Elastic and total reaction cross sections for the system ..cap alpha..+/sup 208/Pb, /sup 209/Bi are analyzed to obtain a limited set of potentials which are, in turn, used to calculate absolute ..cap alpha.. widths. Existing shell-model calculations give ..gamma../sub ...

It is shown that intense ..cap alpha.. fluxes, when incident on a condenser microphone, produce noise, and that this noise is due to ..cap alpha.. ionization in the capacitor interelectrode space which acts as a tiny ionization chamber. Statistical analysis of random events is presented which leads to relations ...

The absolute energies of the Lyman ..cap alpha.. lines of hydrogenlike iron have been measured with an accuracy of 90 ppm with use of a high-precision plane-crystal spectrometer calibrated directly with Co K..cap alpha.. x rays. A value for the 1s Lamb shift of hydrogenlike iron has been ...

Human ..cap alpha../sub 2/-antiplasmin (..cap alpha../sub 2/AP) has been expressed in Chinese hamster ovary cells and purified from conditioned media. The recombinant protein (r..cap alpha../sub 2/AP) is immunologically identical with natural ..cap ...

The absolute cross sections for the Na 3(n alpha )F/sup 20/ and (n, alpha )Sb/sup 124/ reactions are measured at 14 Mev neutron energy. The alpha particles produced in a Nal crystal were directiy counted by a pulse shape discrimination method. The neutron flux was measured with a standard proton recoil ...

The /sup 10/B(n,..cap alpha..), /sup 10/B(n,..cap alpha../sub 1/) and, increasingly in more recent measurement, the /sup 6/Li(n,..cap alpha..) cross sections are the major references used in low energy experiments. Many data from modern measurements are available for the ...

The Michael addition of acrylonitrile to the pyrrolidine enamine of 1-(S-..cap alpha..-phenyl-ethyl)-4-piperidone proceeds with the formation of a 1:1 mixture of 1-(S-..cap alpha..-phenyl-ethyl)-3-(2-cyanoethyl)-4-piperidone diastereomers. A diastereomer isolated in pure form was shown by x-ray diffraction ...

Neutron diffraction has been used to monitor the absolute stereochemistry of an enzymatic reaction. (-)(2S)malic-3-d acid was prepared by the action of fumarase on fumaric acid in D/sub 2/O. After a large number of cations were screened, it was found that (+)(R)..cap alpha..-phenylethylamine forms the large crystals necessary for a ...

Data were taken for five transitions in the lead region allowing a quantitative comparison with corresponding alpha-decay data via R-matrix theory using the same target + alpha nuclear potential. Good agreement between the absolute reduced widths determined from the two sets of data suggests that in transfer reactions, as in ...

The absolute K-shell ionization probabilities of Pb at very small impact parameters by 25-, 40-, and 74-MeV ..cap alpha.. particles are measured in an ..cap alpha..--x-ray coincidence experiment, using the slight inelasticity of the scattered ..cap ...

Experimental conditions were determined for the absolute counting of alpha particles in the liquid scintillator. Results were compared with those obtained by 4 pi gas proportional counting. From an analysis of the pulse height distributions obtained for polonium alpha particles and Ba/sup 137/ conversion electrons, it ...

We present L..cap alpha.. line profiles obtained with 0''.8 spatial resolution and 50 mA spectral resolution during the first rocket flight of the NRL High Resolution Telescope and Spectrograph (HRTS) instrument. Absolute intensity L..cap alpha.. profiles were obtained for ...

A study was carried out on the reaction of dichloromethyl alkyl ethers and sulfides with ..cap alpha..-brominated esters in the presence of zinc resulting in the formation of either ..cap alpha..-alkyl-..beta..-alkoxyacrylates (or ..cap ...

The hypothesis that the luteolytic interaction between prostaglandin F/sub 2/..cap alpha..(PGF/sub 2/..cap alpha..) and estradiol is independent of the uterus was evaluated in hysterectomized and hysterectomized, ovarian x-irradiated ewes. Hysterectomies and either sham or x irradiations were performed 7 or 8 days ...

Absolute cross sections for emission of Lyman ..cap alpha.. radiation have been determined for low-energy H and H/sup +/ impact on N/sub 2/ and O/sub 2/ targets. Data were obtained for projectile energies between about 0.04 and 2.5 keV. Using previously measured cross sections for Balmer ..cap ...

The small angle neutron scattering from copper and two ..cap alpha..-phase Cu-Al alloys has been investigated after selected thermal and thermal-mechanical treatments in order to test an outstanding argument that there is bulk segregation of aluminium in these alloys. Based on absolute integrated intensity determinations, bulk ...

Cross sections for the /sup 48/Ca(/sup 3/He,..cap alpha../sub 0/)/sup 47/Ca reaction have been measured. A comparative distorted-wave Born approximation analysis of this reaction and of the /sup 48/Ca(d,t/sub 0/)/sup 47/Ca reaction provides a zero-range normalization constant for the (..cap alpha..,/sup 3/He) ...

The gamma spectrum of Po/sup 212/ (ThC') was measured by ( gamma , alpha ) coincidences with a fast-slow coincidence apparatus. The results are in excellent agreement with the conversion lines found by the Latyshev group. The absolute gamma intensities were also determined in order to get spins and parities of the levels by ...

The mechanisms involved in the production of fast ..cap alpha..-particles in /sup 12/C induced reactions have been investigated for the /sup 12/C + /sup 208/Pb system at bombarding energies of E(/sup 12/C) = 132, 187 and 230 MeV. Absolute cross sections have been determined for the reactions /sup 208/Pb (/sup 12/C, /sup 8/Be (g.s.)), ...

Several growth factors and hormones are thought to play a role in the growth control of endometrial cells. The authors have shown that prostaglandin F/sub 2..-->../ (PGF/sub 2..cap alpha../) is a growth factor for primary cultures of rabbit endometrium cultured in chemically-defined serum-free medium and that prostaglandin E/sub 1/ (PGE/sub 1/) ...

Strain embrittlement in Ti base alloys during tensile testing was investigated. Results show that in an ..cap alpha..-..beta.. titanium alloy the local activity of H in alpha phase (..cap alpha../sub H//sup ..cap alpha..) increases and activity of H in ...

The folded potential for ..cap alpha.. + nucleus system is discussed from the viewpoint of nuclear deformation. Comparing the folded potential of the ..cap alpha.. + prolate nucleus system (..cap alpha.. + /sup 8/Be, ..cap alpha.. + ...

The alpha particle spectra from the T(t, alpha )n,n reaction were measured at a laboratory angle of 30 deg for triton energles ranging from 0.95 to 2.10 Mev and at laboratory angles of 30, 50, 90, and 120 deg for 1.9-Mev incident tritons. Absolute cross sections are obtained. Analysis of the spectra in terms of a two-stage ...

..cap alpha..-..cap alpha.. and ..cap alpha..-p collisions have been studied at ..sqrt..s = 126 Gev/c and ..sqrt..s = 88 GeV, respectively, using colliding ..cap alpha..-particle and proton beams at the CERN intersecting storage rings. A brief review of ...

Some previous work on alpha transfer reactions in lead isotopes using the reactions (/sup 16/O,/sup 12/C) is considered, and also the decay /sup 212/Po..-->.. /sup 208/Pb + ..cap alpha... Spectra, angular distributions, and the resonance-state wave functions are shown. It is concluded that these transfer reactions indeed proceed ...

... for Absolute Measurements at the ... of a Lyman-alpha photometer on ... MAGNETOSPHERE, ULTRAVIOLET RADIATION), SCIENTIFIC SATELLITES ...

H/sub ..cap alpha../ emission is a useful indicator of hydrogen ionization since the energy required to excite hydrogen to the n = 3 level is approximately the same as to ionize the hydrogen atom. Other aspects of recycling, such as plasma scrape-off parameters, wall particle fluxes, and wall retention rates can be inferred from spatial distributions of ...

The deuterium-protium separation factor, ..cap alpha.., between molecular hydrogen and liquid methylamine in the presence of potassium methylamide catalyst has been measured at low deuterium concentrations over the temperature range -50 to 5/sup 0/C. The separation factor is about 10% larger than that for liquid ammonia, and its dependence upon ...

Neutral transverse energy spectra in pp and ..cap alpha cap alpha.. interactions are analyzed in terms of the Wounded Nucleon Model. Analysis of the ..cap alpha cap alpha.. spectrum by application of a multiple nucleon-nucleon ...

The results of experiments performed at Argonne to determine absolute differential and total cross sections for outgoing protons, ..cap alpha.. particles and neutrons in deuteron-induced reactions on /sup 6/Li at energies between approximately 0.1 and 1.0 MeV are summarized. Discussion of the observed angular and energy distributions ...

We are investigating the decay properties of even-even lead nuclei with A< or =192 in an effort to understand their anomalous ..cap alpha..-decay rates as reported by Hornshoej et al. Our results for /sup 192/Pb were recently published. In this study /sup 190/Pb, T/sub 1/2/=1.2 +- 0.1 min, was produced in the /sup 180/W(/sup 16/O,6n) reaction and its ...

It is shown that the tensor analyzing powers for (d,..cap alpha..) reactions are sensitive to the D-state component in the ..cap alpha..-particle wave function. The D to S-state asymptotic ratio extracted from T/sub 20/ and T/sub 22/ data in J = L +- 1 transitions is discussed using an ..cap ...

Two methods which together allow sensitivity calibration from 20 A to 430 A are described in detail. The first method, useful up to 120 A, uses a low power source to generate K..cap alpha.. x-rays which are alternately viewed by an absolute detector (a proportional counter) and the spectrometer. The second method extends that ...

The evaporation residue yields have been measured for the /sup 12/C+/sup 16/O reaction at five bombarding energies between 62 and 150 MeV. The important contributions of the fusion channels corresponding to 3..cap alpha.. and 4..cap alpha.. emission result in a total fusion cross section which saturates at higher ...

High-energy ..cap alpha.. particles produced a dose-dependent linear increase in different lipid peroxidation products (e.g., malondialdehyde (MDA), conjugated dienes, and hydroperoxides) in the dried thin film state. An inverse dose-rate effect was observed when the dose rate was varied by changing either the ..cap ...

An investigation is made of the effect of toroidal field ripple mirrors on the confinement of ..cap alpha.. particles. It is found that the diffusion of ..cap alpha.. particles into the loss regions of the ripple mirrors during slow down gives rise to significant particle and energy losses.

Synthetic peptides corresponding to 57% of the sequence of ..cap alpha.. subunits of acetylcholine receptors from Torpedo californica electric organ and extending from the NH/sub 2/ to the COOCH terminus have been synthesized. The ..cap alpha..-bungarotoxin binding site on denatured ..cap ...

It is argued that use of the oscillator rule gives an inadequate representation of the effect of the exclusion principle in ..cap alpha..-decay and in similar reactions. The significant separation distance in ..cap alpha..-decay is identified. 6 references.

The coefficients of silicon and germanium linear expansion become negative below 120 and 48 deg K, respectively. Studies were made of the thermal expansion of alpha Sn which crystallizes into a diamond structure simmilar to that of silicon and germanium. The coefficient of alpha Sn linear expansion at temperatures of -130 to 25 deg C was ...

The large-scale magnetic field in a rotating, turbulent gaseous disk will be generated by a dynamo process (the ..cap alpha omega..-dynamo) determined by the differential rotation ..omega..(r) and the spirality function ..cap alpha..(z). The generation is best described by a difference approximation to the dynamo ...

Energies of muonic x rays of the Lyman series of the even sulphur isotopes /sup 32/S, /sup 34/S, and /sup 36/S and of natural phosphorus have been determined with absolute precisions up to 23 parts/10/sup 6/. Equivalent Barrett charge radii R/sub k/,..cap alpha.. have been deduced. Their differences between the sulphur isotopes amount ...

S-Adenosylmethionine decarboxylase is one of a growing class of proteins which use a pyruvoyl group as a cofactor. This enzyme, from E. coli strain HT 527, is composed of two types of subunits, ..cap alpha.. and ..beta.., with the pyruvoyl group covalently linked to the NH/sub 2/-terminal of the ..cap alpha.. ...

The light-harvesting II (LHII) structural genes coding for the (B800-B850 complex) ..beta..- and ..cap alpha..-polypeptides have been cloned and the nucleotide and deduced polypeptide sequences have been determined. This completes the sequencing of all seven structural genes coding for the structural polypeptides of the photosynthetic apparatus that bind ...

Total ..cap alpha.. widths in (n,..cap alpha..) reactions have been measured for the deformed nuclei /sup 151/Eu, /sup 155,157/Gd, /sup 171/Yb, /sup 177/Hf, and /sup 187,189/Os. The experimental data are compared with calculations using the cluster model. The influence of deformation on the ...

A nonlocal, separable, complex, ..cap alpha cap alpha..-interaction potential is proposed, which gives an entirely satisfactory account of the features of the ..cap alpha cap alpha.. interaction over the entire experimentally ...

We propose models for the upper photospheres and lower chromospheres of ..cap alpha.. Cen A and B based on a partial redistribution (PRD) analysis of the Ca II K line cores and damping wings. Coude spectrograms of the Ca II regions in these stars obtained with the Mount Stromlo 74 inch (1.9 m) telescope are calibrated by fitting the far wing profiles of K ...

The compressibility and thermal expansion coefficient of cerium were measured as functions of temperature and pressure.(AIP)

For a given ..cap alpha cap alpha.. potential we show how to calculate in a convenient way the half-off-the-energy-shell cross section sigma/sub half/ for ..cap alpha cap alpha.. scattering. We compute sigma/sub half/ numerically ...

Methyllithium lithiates phenyl vinylic sulfones at -95/sup 0/C in THF solution to yield ..cap alpha..-(phenylsulfonyl)-vinyllithium reagents.

The effect of liquid solution composition, oxygen, and temperature on the alpha / BETA ratio was studied on liquid scintillators. (tr-auth)

A heavy particle transfer mechanism is used here to interpret the anomalous backscattering of ..cap alpha.. particles by light nuclei. (AIP)

A CaF/sub 2/ target was bombarded with 21.9-Mev alpha particles, and the energies of the outgoing protons were measured with a magnetic spectrometer. Proton groups leading to energy levels in Ne/sup 22/ at excitation energies of O, 1.28. 3.37, ground state Q value for the Ca/sup 40/( alpha ,p)Sc/sup 43/ reaction was found to be --3.47 plus or ...

The alpha -decay-constants of certain nuclel near Pb/sup 208/ are calculated by using shell model wave functions with realistic radial functions and considering configurational mixing. Ground state wave functions of Po/sup 211/ and Bi/sup 211/ are coniputed. Close agreement with experiment is obtained for all relative alpha -decay data in even ...

The emission lines H..cap alpha.., H..beta..+(OIII), and L..cap alpha.. have been observed in the high-redshift quasar 1225+31. The ratios of line intensities in 1225+31 are found to be L..cap alpha../H..cap alpha..approx.0.8, ...

cDNA cloning has identified the presence in the human genome of three genes encoding ..cap alpha.. subunits of pertussis toxin substrates, generically called G/sub i/. They are named ..cap alpha../sub i/-1, ..cap alpha../sub i/-2 and ..cap ...

Using a combination of /sup 1/H NMR nuclear Overhauser effect measurements, molecular orbital calculation, and molecular dynamics simulations, the authors have determined the tertiary structure and dynamic properties of the oligomannose oligosaccharide Man..cap alpha..6(Man..cap ...

A spectrophotometric study has been made of twelve binaries by using mean energy distribution data for stars of different spectral classes. Spectrophotometric observations of the twelve binaries, Tau Per, Gamma Per, Epsilon Aur, Zeta Aur, Alpha Aur, Omicron Leo, Beta Cyg, Delta Sge, 31 Cyg, 32 Cyg, Beta Cap, and Eta Peg, were carried out during the period ...

Resonant Raman x-ray scattering on molybdenum was studied using a Mo-anode x-ray tube and a LiF crystal monochromator. Beside the usual resonant Raman peak corresponding to the fluorescent K..cap alpha.. lines, another peak with a smaller energy loss was found. It is attributed to resonant Raman scattering with a final-state M-shell vacancy corresponding ...

Absolute rate constants determined by using the flash photolysis-resonance fluorescence technique are reported for the reactions of hydroxyl radicals with isoprene, ..cap alpha.., and ..beta..-pinene, methyl vinyl ketone, and methacrolein in the temperature range 297-424 K, and with methylglyoxal at 297 K. These results contribute to a ...

Some of the essential features of the experimental results and theoretical interpretations of ..cap alpha..-transfer reactions are summarized. (WHK)

The statistical approach is used to develop a method for obtaining the ..cap alpha..-particle strength functions S/sub ..cap alpha../ of neutron resonances for deformed nuclei. Analysis of the experimental data on the reaction (n,..cap alpha..) on the nuclei /sup 155/Gd, ...

Resonant Raman x-ray scattering on molybdenum was studied using a Mo-anode x-ray tube and a LiF crystal monochromator. Beside the usual resonant Raman peak corresponding to the fluorescent K..cap alpha.. lines another peak with a smaller energy loss was found. It is attributed to resonant Raman scattering with a final state M-shell vacancy corresponding to ...

Intensities of translational lattice mode absorptions of alpha phase solid molecular nitrogen in far

The output signal of a photomultiplier is sensitive to changes in temperature. Two coefficients are required to specify this dependence: the multiplier gain coefficient ..cap alpha../sub m/ and the spectral sensitivity coefficient ..cap alpha..(lambda). ..cap alpha../sub ...

The plasma red shifts of H/sub ..cap alpha../ and D/sub ..cap alpha../ were measured in an atmospheric-pressure wall-stabilized arc, which was operated in argon with a small admixture of either hydrogen or deuterium. The measurements have yielded, within the experimental uncertainties, the same red shifts for H/sub ...

Cross sections have been measured for the production of /sup 6/He, /sup 6/Li, /sup 7/Li, and /sup 7/Be in the ..cap alpha.. + ..cap alpha.. reaction between 61.5 and 158.2 MeV. The insignificance of these measurements for theories of lithium nucleosynthesis is discussed.

Four B stars, ..cap alpha.. Vir, ..beta.. Cen, ..cap alpha.. Gru, and ..beta.. Lib, were observed with the Copernicus Princeton Telescope Spectrometer at a resolution of 0.1 A in order to investigate the presence of chromospheric emission. Emission was observed in ..beta.. Cen and ..cap ...

Particle capture by a slowly varying one-dimensional periodic potential is studied by the method of averaging. For large time intervals t approx. 1/..cap alpha.. (..cap alpha.. is the small parameter which characterizes the rate of change of the potential), including the point of intersection of the separatrix, the ...

Preliminary results are presented for the total neutral energy spectra in the central region from ..cap alpha cap alpha.. and pp collisions at center-of-mass energies of ..sqrt..s = 31 GeV per nucleon pair. (WHK)

Antisera directed against specific subunits of guanine nucleotide-binding regulatory proteins (G proteins) were used to immunoprecipitate these polypeptides from metabolically labeled cells. This technique detects, in extracts of a human astrocytoma cell line, the ..cap alpha.. subunits of G/sub s/ (stimulatory) (..cap ...

The effect of ..cap alpha..' and ..cap alpha..'' phases on the mechanical properties of commercial titanium alloys of the martensite type (VT6, VT14, VT3-1, VT16) was investigated. A substantial strengthening effect (as much as 30 percent) in alloys VT6, VT14, and VT3-1 is due to the ...

Interleukin 1..cap alpha.. (lL-1..cap alpha..), tumor-necrosis factor ..cap alpha.. (TNF..cap alpha..), granulocyte colony-stimulating factor (G-CSF), and granulocyte-macrophage colony-stimulating factor (GM-CSF) are molecularly ...

The investigations showed that increasing the ..cap alpha../sub 1/ content of the pitch retards the formation, growth and consolidation of mesophase spherules during low-temperature carbonization. The quinoline-soluble ..cap alpha../sub 2/ fraction accelerates the formation, growth, and consolidation of the ...

Using photoaffinity labeling, they have found a form of the NaK-ATPase catalytic subunit, ..cap alpha..(-), in the rat brain that is distinct from the ..cap alpha.. and ..cap alpha..(+) forms. Strong radiolabeling of ..cap ...

In the reaction of sterically hindered Grignard reagents with 1-..cap alpha..-naphthyl-1-chloro-1-silacyclobutane, the Si-Cl bond is reduced to Si-H with the formation of 1-..cap alpha..-naphthyl-1-silacyclobutane. When the reaction is conducted in toluene, metallization of the solvent is the basic transformation, ...

The inclusion of 0.05 to 20 mol% of ..cap alpha..-hydroxyacetamide in single crystals of ..cap alpha..-chloroacetamide has shown that the four line ESR pattern observed for x-ray irradiated ..cap alpha..-chloroacetamide single crystals at 77 K is due to the alkoxy radical ...

It was established by radioimmunological methods based on the use of mono- and polyclonal antibodies against interferon ..cap alpha..A that the latter react quantitatively not only with this protein, but also with interferons ..cap alpha..F and ..cap alpha..N, whereas all ...

The carbon-13 nuclear magnetic resonance spectra and substituent effects of several acyclic disulfides and their oxidized derivatives are reported. Oxidation of a disulfide to a thiosulfinate or a thiosulfonante has a deshielding effect on the ..cap alpha..-carbon atom and a shielding effect on the ..cap ...

Paired correlations of nucleons of the superconducting type play an important role in nuclear BETA and gamma transitions, and should also be important in alpha decay. A theory of alpha decay was formulated within the framework of a superfluid model of the nucleus, and the effect of paired correlations of the superconducting type on the ...

The /sup 13/C(..cap alpha..,n)/sup 16/O and /sup 13/C(..cap alpha..,..cap alpha..)/sup 13/C reactions are investigated through the generator-coordinate method. Two bands with marked ..cap alpha..+ /sup 13/C structure are found in the /sup 17/O spectrum. ...

An extension of the Lee model in quantum field theory is presented which has some of the features of mesic atoms. The model has three fermions V, N/sub 1/, and N/sub 2/, and two bosons theta/sub 1/ and theta/sub 2/ which interact according to Varrow-right-leftN/sub ..cap alpha../+theta/sub ..cap alpha../, ...

At least 20 genes encode the structurally related collagen chains that comprise > 10 homo- or heterotrimeric types. Six members of this multigene family have been assigned to five chromosomes in the human genome. The two type I genes, ..cap alpha..1 and ..cap alpha..2, are located on chromosomes 17 and 7, ...

We present observational evidence that two newly observed transient solar phenomena, EUV macrospicules and X-ray bright-point flares, are closely related.Time-lapse H..cap alpha.. filtergram observations of the limp in quiet regions show small surgelike eruptions. We report our observations of these H..cap alpha.. ...

A peripheral model is proposed for calculations of the quasielastic knockout (..cap alpha.., 2..cap alpha..) in which one includes explicitly the contributions to the reaction amplitude from the pole and triangle Feynman diagrams corresponding to rescattering in the final state. The peripheral character of the ...

To establish whether the diurnal decrease in the density of ..cap alpha..1 receptors observed in the medial preoptic nucleus (MPN) of estrogen (E/sub 2/)-treated rats is related to the concomitant diurnal increase in norepinephrine (NE) turnover rates, we quantitiated the density of (/sup 3/H)-Prazosin binding to ..cap ...

The delta phase stabilized with 2 at.% aluminum transforms to a monoclinic ..cap alpha..' phase at low temperatures by a thermally activated nucleation and displacive/diffusionless mechanism. The ..cap alpha..' phase is an expanded monoclinic lattice suggesting a valence change in the ...

A radioenzymatic assay for the activity of acetohydroxy acid synthase on one of its substrates, ..cap alpha..-ketobutyrate, was developed. Advantage was taken of the fact that acidification of the product of the enzymatic reaction releases /sup 14/CO/sub 2/, which is derived from the carboxyl group of ..cap ...

..cap alpha../sub 2/-Antitrypsin (..cap alpha../sub 1/AT) deficiency is a hereditary disorder characterized by reduced serum levels of ..cap alpha../sub 1/AT, resulting in destruction of the lower respiratory tract by neutrophil elastase. As an approach to augment ...

The recent suggestion that the effects of a D-state component of the ..cap alpha.. particle are being seen in (d, ..cap alpha..) reaction tensor analyzing power data is reexamined using exact finite range distorted-wave Born approximation calculations. Results for /sup 32/S(d,..cap ...

The results of measurements of alpha-particle spectra at seven distinct resonances of /sup 67/Zn are presented, and the presence of ..cap alpha../sub 0/-transitions is demonstrated. These data eliminate the assumption of the violation of statistical rules for ..cap alpha../sub 0/ and ...

The differential cross section for the (d, alpha ) reaction is given together with the effect of the nuclear radius and the form of the wave function of the alpha particle on the shape of the angular distribution. (auth)

Embryonic hemoglobins in ..cap alpha..-thalassemic heterozygotes and normal fetuses were compared to study the effects of the deficient ..cap alpha.. chain on the synthesis of hemoglobins in the nucleated embryonic erythrocytes derived from the fetal yolk sac. Acrylamide gel electrophoresis showed that less ...

A source of ..cap alpha.. particles is described in which each ..cap alpha.. particle emitted causes the appearance of an electrical pulse in the output circuits of an electronic source circuit. This source may be used to calibrate the detector path in the presence of extraneous radiation.

This paper examines the possibility of the existence of cosmological cosmic rays (CCR), in the framework of big-bang cosmology. The model assumes a total energy spectrum similar to that observed at Earth at high energies, a composition of protons and ..cap alpha..-particles only, with ..cap alpha../p=0.1. Following ...

The final data and analysis of the Coulomb explosion of two molecular systems, C/sub 3//sup +/ /sup 0/ /sup -/ and NCO/sup +/ /sup 0/ /sup -/, each measured in the positive, neutral and negative charge state are reported. In addition, a new measurement has been made with the CH/sub 2//sup +/ ion and preliminary results are reported. All of these complex molecules are produced as negative ions by ...

The (d,..cap alpha..) reaction on /sup 208/ /sup 206/ /sup 204/Pb has been studied at 80 MeV bombarding energy. The experimental angular distributions are structured and the transferred angular momentum L could be determined without ambiguity from a comparison of distorted-wave Born-approximation calculations with the experimental angular distributions. ...

Single crystals of x-irradiated ..cap alpha..-D-glucopyranose (..cap alpha..Glu) and ..cap alpha..-methyl-D-glucopyranoside (..cap alpha..MeGlu) were studied to determine products and reaction mechanisms in carbohydrate radiation ...

Absolute alpha-decay widths for the alpha-decays of 212, 214, 216Po are calculated within the framework of the nuclear field theory. A tremendous enhancement factor produced by configuration mixing is found.

The loss of ..cap alpha..-globin gene transcriptional activity rarely occurs as an acquired abnormality during the evolution of myeloproliferative disease or preleukemia. To test whether the mutation responsible for the loss of ..cap alpha..-globin gene expression (hemoglobin H disease) in these patients is linked ...

It is assumed that /sup 8/Be consists of two ..cap alpha.. particles which are close to each other in configuration space. A spectroscopic density of /sup 8/Be cluster in the residue nuclei is then obtained, which is proportional to the square of the preformation probability of ..cap alpha.. particle at nuclear ...

F/sub 1/(..cap alpha..) is defined as the contribution of the one-fermion-loop diagrams to the divergent part of the photon propagator in massless quantum electrodynamics. To sixth order, the perturbation expansion of F/sub 1/(..cap alpha..) has rational coefficients: F/sub 1/(..cap ...

Catalytic dehydrochlorination (DHC) of polychloroalkanes containing the CCl/sub 3/ group by use of metal chlorides is one of the most widely used methods for synthesizing compounds containing the dichlorovinyl group. In this study the authors have compared the catalytic activity of metal carbonyls and related catalytic systems in the absence of hydrogen donors on the DHC reactions of ...

..cap alpha../sub 1/-Antichymotrypsin belongs to a supergene family that includes ..cap alpha../sub 1/-antitrypsin, antithrombin III, ovalbumin, and angiotensinogen. The human chromosomal ..cap alpha../sub 1/-antichymotrypsin gene has been cloned and its molecular structure ...

We have performed the coincidence experiments (..cap alpha..,..cap alpha..'f) and (..cap alpha..,..cap alpha..'nf) on /sup 238/U for a beam energy E/sub ..cap alpha../ = 120 MeV and for ..cap ...

The interactions of ..cap alpha..-cyclodextrin-analyte responsible for the luminescence phenomenon observed from compounds adsorbed on an 80% ..cap alpha..-cyclodextrin-sodium chloride mixture were compared with the interactions of the prepared solid-phase ..cap ...

Thymosin ..cap alpha../sub 1/(T..cap alpha../sub 1/) is a biologically active thymic peptide currently undergoing trials as an immunomodulator in cancer patients and patients with immunodeficiencies. Abnormally elevated levels of T..cap alpha../sub 1/ have been found in the ...

The high pressure form of cerium metal stable above 51 kbar, ..cap alpha..'-Ce, is found to be orthorhombic with the ..cap alpha..-U type of structure. At 58 kbar the cell dimensions of ..cap alpha..'-Ce are: a = 3.049 A, b = 5.998 A, c = 5.215 A. A ...

A new polyclonal antibody against the ..cap alpha..-polymerase catalytic polypeptide was prepared by using homogeneous HeLa cell..cap alpha..-polymerase. The antibody neutralized ..cap alpha..-polymerase activity and was strong and specific for the ...

Two-nucleon-transfer reactions induced by heavy ions have been particularly successful in pointing out contributions of inelastic two-step processes. They provide a way to investigate the overlap between the wave functions of excited states of the target and residual nuclei. However, calculations of absolute cross sections must take into account sequential transfer. The ...

We report on a search for neutrino oscillations of the type nu/sub ..mu../ ..-->.. nu/sub e/ in a detector located an effective distance of 96m from the neutrino source in the wide band neutrino beam at the Brookhaven AGS. No excess of electron events was observed. The resulting upper limit on the strength of the mixing between nu/sub ..mu../ and nu/sub e/ in the case of large mass difference ...

The scattering function S (Q,..omega..) for droplets of superfluid helium near absolute zero is calculated. Assuming that the surface tension tau=tau/sub 0/+tau-tilde (t) is fluctuating with correlation strength ..cap alpha.., a wave diffusion decay mechanism for a nondissipative system is found. For each lth multipole of droplet shape ...

Differential cross sections for ..cap alpha.. particles elastically scattered from /sup 142/,/sup 144/,/sup 146/,/sup 148/,/sup 150/Nd have been measured at six angles over the energy region 11--19 MeV. The cross sections were analyzed using the optical model, the incoming-wave boundary condition model, and the coupled-channels model. The radius at which ...

Pemphigus vulgaris in Israeli Ashkenazi and non-Ashkenazi Jews and in Austrian non-Jewish patients is strongly associated with the DR4 and DRw6 alleles of the HLA-D region class II genes. Restriction fragment length polymorphism analysis was undertaken with DQ..beta.., DQ..cap alpha.., and DR..beta.. cDNA probes. Hybridization with the DQ..beta.. probe ...

On the basis of the results of kinetic investigations, two binding sites for hydroxythiamine diphosphate were determined in apotransketolase, with sharply differing values of K/sub i/: (7-22) x 10/sup -9/ and (13.0-19.7) x 10/sup -8/ M. A study was made of the turnover rate of thiamine diphosphate in holotransketolase in rat liver tissue by a radioisotope method, using (/sup 14/C) thiamine as the ...

A tritium extraction facility has been built for the purpose of measuring the absolute tritium concentration in neutron-irradiated lithium metal samples. Two independent calibration procedures have been used to determine what fraction, if any, of tritium is lost during the extraction process. The first procedure compares independently measured /sup 4/He and /sup 3/H ...

The (p,p..cap alpha..) cluster knockout reaction on /sup 9/Be was investigated using polarized incident protons. Coincident data for eight quasifree angle pairs were obtained at a bombarding energy of 150 MeV. Both differential cross sections and analyzing powers were measured for the energy-sharing distribution. Distorted wave impulse approximation ...

Untransformed bovine anterior pituitary cells cultured in serum-free defined medium secrete an epidermal growth factor (EGF)-like peptide with an amino acid composition similar to rat or human ..cap alpha..-transforming growth factor (..cap alpha..TGF). To further characterize the bovine pituitary ...

Recent data reported on ..cap alpha..-emitting isotopes in the mass region above 140 are reviewed, ..cap alpha..-decay energies are compared with predictions of mass formulae, and ..cap alpha..-decay rates of even-even nuclei are discussed. 19 references.

The method of Osinki et al. was used to synthesize n analysis of peripheral blood. 1-Dehydroaldosterone 21-acetate in dioxane was reduced with tritium over 5% palladiumon-charcoal. Aldosterone acetate-1 alpha ,2 alpha -H/ sup 3/ was separated from the products by chromatography and hydrolyzed with lipase or bicarbonate to give aldosterone-1 ...

Experimental results are reported on measurement of the energy spectra, production cross section, and angular distributions of ..cap alpha.. particles in coincidence with fission fragments produced in the reaction /sup 197/Au+/sup 22/Ne (178 MeV). It is shown that in this reaction ..cap alpha.. particles are ...

X irradiation of cells induces damage in the DNA, which can be detected as fragmentation of the DNA in alkali. To examine whether DNA polymerase ..cap alpha.. plays a role in the X-ray-induced fragmentation of the DNA, cells with and without functioning DNA polymerase ..cap alpha.. have been compared. We have used ...

The polarization dependence of magnetic neutron scattering is shown to depend on the imaginary part of the symmetric generalized susceptibility, chi/sub s//sup ..cap alpha beta../ = /sup 1///sub 2/(chi/sup ..cap alpha beta../(Q,..omega..) + chi/sup ..beta cap ...

The competition between pn and d as well as between ..cap alpha..pn and ..cap alpha..d evaporation leading to the production of the same residual nuclei has been measured for nine and five heavy-ion-induced nuclear reactions, respectively, each at several bombarding energies. The deduced sigma/sub pn//sigma/sub d/ ...

The authors isolated a cDNA clone from a human skeletal muscle library which contains the complete protein-coding sequence of a skeletal muscle ..cap alpha..-tropomyosin. This cDNA sequence defines a fourth human tropomyosin gene, the hTM..cap alpha.. gene, which is distinct from the hTM/sub nm/ gene encoding a ...

The reaction /sup 51/V(..cap alpha..,..cap alpha..'p) at E/sub ..cap alpha../ = 172.5 MeV is studied by measuring in-plane correlations at large angles. The data show the presence of two different reaction mechanisms: a direct proton knockout which was analyzed under the assumption of ...

The /sup 12/C(p,..cap alpha..)/sup 9/B and /sup 32/S(p,..cap alpha..)/sup 29/P reactions have been studied at incident energies of 42.77 and 41.9 MeV, respectively. The experimental (p,..cap alpha..) relative cross sections are well reproduced by distorted wave direct ...

For T/sub ..cap alpha..//T/sub i/ < 150 (where T/sub ..cap alpha../ is the ..cap alpha..-mean energy and T/sub i/ the ion temperature) the trapped ..cap alpha..-precession resonance destabilizes the kinetic ballooning mode of the ...

The binding of ..cap alpha../sub 2/-macroglobulin (..cap alpha../sub 2/M) to human peripheral blood monocytes was investigated. Monocytes, the precursors of tissue macrophages, were isolated from fresh blood by centrifugal elutriation or density gradient centrifugation. Binding studies were performed using /sup ...

The ..cap alpha.., ..beta../sub 2/, and ..cap alpha beta.. forms of the RNA-dependent DNA polymerase of avian sarcoma virus B77 grown in duck embryo fibroblasts have been compared with respect to several kinetic properties. The K/sub m/ values for dTTP and dGTP for enzyme forms ..cap ...

In vitro, genital skin 5..cap alpha..-reductase activity (5..cap alpha..-RA) was measured in ten hirsute women with normal androgen levels (idiopathic hirsutism (IH)) and in ten hirsute women with elevated androgen levels (polycystic ovary syndrome (PCO)) in order to determine the influence of secreted androgens on ...

The authors characterized the effect on human lung fibroblast proliferation of recombinant interferons (gamma (..gamma..), alpha/sub A/ (..cap alpha../sub A/), alpha/sub D/ (..cap alpha../sub D/) and beta (..beta..)). Quiescent and log phase fibroblasts were used. ...

The structure of (+)/sub 579/-(eta/sup 5/-C/sub 5/H/sub 5/Mo(CO)/sub 2/(NN*))PF/sub 6/ with NN* = the Schiff base derived from pyridine-2-carbaldehyde and (S)-(--)-..cap alpha..-phenylethylamine was determined using standard single-crystal x-ray diffraction methods. The absolute configuration was determined by refinement of the data ...

Results reported for ..cap alpha..-diketone-sensitized photooxidation of pyrimidines indicate that pyrimidine epoxides may be formed as initial photooxidation products. These intermediates are shown to be exceedingly susceptible to the attack of neucleophiles. This mechanism is proposed as an alternative mechanism for the formation of protein-nucleic acid ...

We have derived a theoretical expression for Warman et al.'s parameter ..cap alpha.. in electron scavenging in the radiolysis of hydrocarbon solutions.

(6-/sup 3/H)-1..cap alpha..-Hydroxyvitamin D/sub 3/ was chemically synthesized and its full biological activity and radiochemical purity were demonstrated. With the use of this preparation it has been possible to demonstrate in vivo that in rats the (6-/sup 3/H)-1..cap alpha..-hydroxyvitamin D/sub 3/ is converted ...

A comment (1) has been made concerning statements made in a paper entitled Variable Low-Temperature Martensitic Behavior of ..cap alpha..-Phase Uranium (2). The following technical note is presented as a reply to that comment.

This is a short summary of results obtained in experiments performed with the Orsay Synchrocyclotron on the (p,p..cap alpha..) reaction on several even-even nuclei.

Column-purified monoiodinated, diiodinated, and tritiated derivatives of ..cap alpha..-bungarotoxin (..cap alpha..-Bgt) are distinguished on the basis of their ultraviolet absorption and circular dichroism (CD) spectra. The pattern of changes in CD spectra on incorporation of iodine into a single tyrosine residue ...

Energy transfer was investigated in the ..cap alpha beta.. monomer and separated ..cap alpha.. and ..beta.. subunits of C-phycocyanin from Anabaena variabilis and Anacystis nidulans, using steady-state and picosecond spectroscopy. Fluorescence excitation polarization spectra were consistent with a sensitizing (s) - ...

The habit plane shift phenomenon of ..cap alpha..'' nitride (Fe/sub 16/N/sub 2/) precipitate in ..cap alpha..-Fe is discovered by TEM observation. The habit plane of ..cap alpha..'' precipitate shifts from (100) toward (102). The angular ...

The method of molecular mechanics is used to investigate the structural and electrostatic features of molecular recognition by Beta-cyclodextrin and capped Beta -cyclodextrin models of alpha -chymotrypsin. Since capped Beta -cyclodextrin has been shown to...

The mobility of ..cap alpha.. particles in helium gas is calculated using the zeroth-order Viehland-Mason theory with interaction potentials recently computed by Cohen and Bardsley. The results show a dependence on field strength similar to the measurements of Johnsen and Biondi but are lower in magnitude by about 5%.

Ever since the initial description of ..cap alpha../sub 1/-proteinase inhibitor (..cap alpha../sub 1/PI), the role of this plasma glycoprotein and its allelic polymorphism in disease and in healthy physiology has been the subject of much investigation, ..cap alpha../sub ...

The influence of alpha -alanine on the distribution coefficient in TBP- aqueous nitrate extraction of Zr was investigated. It was found that 0.1 M alanine had no influence on the distribution. (R.V.J.)

This invention relates to compositions which are the reaction products of phenol-formaldehyde resins, ..cap alpha..-olefins epoxides derived from ..cap alpha..-olefins of 4 or more carbons and alkylene oxides such as ethylene and propylene oxides; and to the use of these compositions as dehazers for petroleum ...

Determination of invariant-plane strain crystallographic solutions for martensitic transformation between the FCC delta and monoclinic ..cap alpha.. phases in plutonium alloys, using three possible lattice correspondences and 53 possible lattice-invariant shear systems, identifies the most probable delta-..cap ...

The infrared and Raman spectra of ..cap alpha..-resorcinol crystals are investigated at low temperatures. Fine structure in the vibrational exciton states are resolved. Symmetry assignments of the crystal and molecular transitions are proposed based on the polarization properties of the bands. Most of the earlier assignments are revised.

Chromatography on immobilized monoclonal antibodies NK-2 from a bacterial producer strain yielded pure human leukocytic ..cap alpha..-interferon A (..cap alpha..-INF-A), homogeneous in polyacrylamide gel electrophoresis in the presence of SDS and in reversed-phase high-performance liquid chromatography. The ...

A simple heuristic model for the valence of Pu in its various phases is used to explain the large positive deviations from Vegard's Law in ..cap alpha..-Pu(Al), ..cap alpha..-Pu(Ti), and delta-Pu(Sc).

In this report the order-..cap alpha.. correction to the lowest-order orthopositronium decay rate due to the two outer-vertex graphs is obtained in analytic form.

Attempted coupling of 6..beta..-methoxy-3..cap alpha..,5-cyclo-5..cap alpha..-23,24-bisnorcholan-22-yl tosylate with gamma,gamma/sup -/ dimethylallyl bromide in the presence of magnesium leads to the formation of 22,22'-bis-6..beta..-methoxy-3..cap ...

The method developed by Brandt and Reinheimer which explicitly includes the effect of the semiconductor gap has been used to calculate the proton and ..cap alpha..-particle stopping powers of the valence-electron gas of C (diamond), ZnTe, and U. These values, as well as those existing for Si and Ge, have been combined with the stopping contribution of the ...

Absolute spectrophotometric observations of the dwarf nova SS Cygni have been obtained at maximum light, during the subsequent decline, and at minimum light. In order to provide a critical test of accretion disk theory, a model for a steady-state ..cap alpha..-model accretion disk has been constructed which utilizes a grid of stellar ...

A Ra- Be neutron source with a graphite moderator was used for the preparation of a reference standard for thermal neutron fluxes. The work involved the measurement of the spatial distribution of the slowing-down density on the basis of the activation of In foils along the principal axis of the graphite prism for determining the spatial distribution of the thermal neutrons. The prism ...

Alpha-ketobutyrate (..cap alpha..KB), an intermediate in the catabolism of threonine and methionine, is decarboxylated to propionyl-CoA. The authors have reported that propionate (PROP) inhibits oxidative metabolism in rate hepatocytes. Based on these observations, the present study examined the effects of ..cap ...

We suggest that there may be different precursors of the alpha phase of plutonium in the martensitic delta ..-->.. ..cap alpha.. transformation, depending upon whether the metastable delta-phase alloy is compressed or cooled below ambient. The precursors may be either the orthorhombic (..gamma..) phase, which is observed, or an hcp ...

If the alpha spectra of the separated isotopes of natural uranium are known, the isotopic abundance of a sample of enriched uranium can be deduced. The alpha spectra are obtained by the pulsed ionization chamber method. alpha spectrometry is of particular interest for all measurements where the influence of U/sup 2//sup ...

Results are presented of a theoretical study to calculate the alpha / BETA ratio of filter-collected natural airborne radioactivity. The detection of airborne Pu contamination by noting increases in this alpha / BETA ratio is discussed. A modification of this approach which provides a more uniform response to alpha ...

By using a gamma -spectrometric absolute method the following effective cross sections were determined in the Rossendorf Reactor WWR-S: Ti/sup 46/(n,p)Sc/ sup 46/, 17 450 deg C in a 3 mb; Ti/sup 47/(n,p)Sc/sup 47/, 18 450 deg C in a 3 mb; Ti/sup 48/(n,p)Sc/sup 48/, 0.44 450 deg C in a 0.08 mb; Ge/sup 72/(n, alpha )Zn/sup 69m/, 0.020 450 deg ...

The excitation functions and absolute cross sections for the P/sup 31/ (n,p)Si/sup 31/ and Al/sup 27/(n, alpha )Na/sup 24/ reactions have bee n measured by the activation method for neutron energies below 9.5 Mev and at 14.1 Mev. The excitation function for P/sup 31/(n,p)Si/sup 31/ rises from 1.6 Mev to 5.5 Mev, is fairly constant at 0.14 barn to ...

Cell killing and the frequency of mutation to thioguanine resistance (HGPRT enzyme deficiency) were measured after irradiation of cultured hamster cells with 250-kV X rays and with /sup 238/Pu ..cap alpha.. particles. The frequency of mutants induced by these ..cap alpha.. particles, for a given level of cell ...

An approximate X..cap alpha.. functional is proposed from which the charge density fitting equations follow variationally. LCAO X..cap alpha.. calculations on atomic nickel and diatomic hydrogen show the method independent of the fitting (auxiliary) bases to within 0.02 eV. Variational properties associated with ...

The effect of high longitudinal particle velocities or strong radial electric fields on transport processes in an axisymmetric tokamak is analyzed. As the parameter ..cap alpha.. = V/sup 2//sub parallel//c/sup 2//sub s/ increases, the heat flux averaged over a magnetic surface increases, while the particle fluxes may change in magnitude and direction. In ...

The Mov-13 mouse strain carries a retroviral insertion in the pro..cap alpha..1(I) collagen gene that prevents transcription of the gene. Cell lines derived from homozygous embryos do not express type I collagen although normal amounts of pro..cap alpha..2 mRNA are synthesized. The authors have introduced genomic ...

The concentrations of ..cap alpha..-, ..beta..- and ..gamma..-endorphin were determined by radioimmunoassay in HPLC fractionated extracts of post mortem hypothalamic tissue obtained from schizophrenic patients and controls. The hypothalamic concentration of ..cap alpha..- and ..gamma..-endorphin was significantly ...

The reaction of benzo(..cap alpha..)phenothiazin-5-one with aromatic amines proceeds under mineral acid activation of the substrate to generate 6-arylamino derivatives exclusively. N-Alkylanilines give, in addition to the corresponding 6-N-alkyl-N-arylamino-benzo(..cap alpha..)phenothiazin-5-ones, the dealkylation ...