Acceleration of the Aging Process by Oxygen. The frequent use of artificial atmospheres for underwater activities as well as for the purposes of ...

The behavior of 138 kV nonceramic line post insulators is investigated by means of clean fog tests conducted before and after aging in a specially designed accelerated aging chamber. The laboratory aging cycles are justified on the basis of actual weather in the coastal regions of Florida. Analytical measurements ...

The authors investigate the aging and strengthening behavior of drill pipes made of aluminium alloy D16 and used in the drilling of oil and gas wells by simulating field operating conditions both in mechanical laboratory tests and on a computer. They find that the operating conditions of drill pipes ensure that in boreholes with elevated temperatures the pipes are subjected to ...

... The Accelerated Ageing of some Commercial Polyurethane Rubbers ,j 4~ ... r The Accelerated Ageing of some Commercial Polyurethane Rubbers by ...

... waveguide accelerators at the Tomsk Polytechnic Institute; High voltage artificial shaping lines for modulators of linear accelerators; A nanosecond ...

First the acceleration on the inclined plane is calculated. Then we view the friction force and the artificial acceleration. We see different cases. There is an english and a german edition.

The artificial iris is the structure responsible for the dissimulation and aesthetics of ocular prosthesis. The objective of the present study was to evaluate the color stability of artificial iris of microwaveable polymerized ocular prosthesis, as a function of paint type, drying method and accelerated aging. A ...

Artificial aging has been used to reproduce natural aging processes in an accelerated pace. Questioned documents were exposed to light or high temperature in a well-defined manner in order to simulate an increased age. This may be used to study the aging processes or to ...

This report describes research conducted to determine the contamination performance of [sup 138] kV transmission line insulators utilized by Florida Power and Light Co. Although test results for both ceramic and nonceramic insulators are reported, emphasis is placed on the performance of nonceramic line posts before and after artificial aging. Since it was ...

The present study was carried out to elucidate the mechanism of seed deterioration in two cotton (Gossypium hirsutum L.) cultivars (HS6 and H1098). The seeds were artificially aged at 40 +/- 1 degree C and 100% relative humidity for 4 days. In both cultivars, germinability decreased, whereas membrane deterioration, as assayed by electrical conductivity of ...

... on Superplastic Behavior of High Strength Aluminium Alloy. ... Artificial aging improved the distribution of ... PROPERTIES OF METALS AND ALLOYS. ...

... ADD878946. Title : COMPUTER MANAGED ACCELERATED WEAR TESTING OF ARTIFICIAL HEART VALVES. Corporate Author : ...

The purpose of this investigation was to determine the practical and clinically useful aspects of a portable 'artificial kidney' that would require no dialysis fluid. The movement of water and small molecules across an artificial membrane was accelerated ...

Sep 13, 2010 ... IGBT accelerated aging data set. A dataset shared by ... Home> Nikunj Oza > Resources> IGBT accelerated aging data set. About DASHlink ...

The chief purpose of the test was to obtain, in a relatively short time, indications of the behavior and any degradation of the optical cable in service. The test was substantially derived from that proposed at CIGRE to represent the long-term behavior of...

... Descriptors : *AGING(MATERIALS), *SEMICONDUCTOR DEVICES, *ACCELERATED TESTING, LIFE EXPECTANCY(SERVICE LIFE), COST ...

... Accession Number : ADD875368. Title : SANDIA LSI ACCELERATED AGING AND DATA ACQUISITION TECHNIQUES. Corporate Author : ...

degradation models and prediction of remaining useful life. The accelerated aging system is designed for the exploration of intrinsic degradation mechanisms ...

... Title : ACCELERATED AGING OF NYLON 66 AND KEVLAR 29 IN ELEVATED TEMPERATURE, ELEVATED HUMIDITY, SMOG, AND OZONE. ...

The ageing behaviour of stainless steel joints bonded with hot-curing adhesives is crucial for their reliability and durability in engineering applications. In industry, accelerated artificial ageing regimes are combined with short-term mechanical tests to simulate the in-service long-term behaviour and to predict ...

Different artificial ageing treatments were applied to fresh incinerator bottom ash with the aim of promoting/accelerating the natural reactions occurring over time on the mineral phases in the material. The weathering treatments included accelerated carbonation, treatment with air and treatment with nitrogen gas. ...

The purpose of this study was to assess color alteration of the paints used for iris painting in artificial eyes. Five disks of heat cured acrylic resin were confectioned by microwave energy for each paint analyzed, in a total of 40 specimens. Each specimen consisted of a colorless acrylic resin disk and another of equal size, of scleral white colored acrylic resin, with the ...

Onion seeds were exposed to l000 r x irradiation and stored in an oven at 42 deg C to hasten the aging process. Artificial aging did not increase the aberration frequency during the first three weeks, but with subsequent aging the aberration frequency increased rapidly and at an ...

... OF ALCOA'S NEW ARTIFICIAL AGING TREATMENT FOR 7079 ALUMINUM ALLOY. ... Immediate artificial aging of aluminum alloys, 7075 and 7178 ...

Purpose: The purpose of this study was to investigate the effect of extraoral human and environmental conditions on the mechanical properties (tensile strength and modulus, elongation, tear strength hardness) of maxillofacial silicone elastomer. Materials and Methods: Specimens were fabricated using TechSil-S25 silicone elastomer (Technovent Ltd, Leeds, UK). Eight groups were prepared (21 ...

The accelerated corrosion (erosion) of 70/30 cupro-nickel alloy was investigated as a function of environment using a laboratory recirculation loop. The environments utilized were unpolluted artificial sea water and artificial sea water polluted with sulf...

Paper and papyrus endurance depends on their intrinsic properties that are related to the manufacture processes and to the environmental conditions (temperature, humidity, presence of micro-organisms, etc.). During the time, paper and papyrus undergo unavoidable ageing processes causing mainly the degradation of the cellulose. In the framework of the European Project ...

of snow mold diseases. Breeding snow-mold-resistant cultivars could be accelerated with artificial snow

... saturated fatty acids are known to accelerate blood clotting and artificial thrombus formation in vitro, and to produce massive thrombosis and death ...

The feasibility of generating artificial auroras by injecting electrons into the upper atmosphere was investigated by using an electron accelerator aboard an Aerobee 350 rocket. Four of the artificial auroral rays were detected and recorded by two geophys...

The discharge and tracking phenomena induced on the polymer dielectric materials by acid rain are investigated by the accelerated aging of acrylonitrile-butadiene-styrene copolymer in artificial rainwater in this article. Based on the investigation of acid rain, the artificial rainwater is chosen to agree well with ...

Gerodontology 2011; doi: 10.1111/j.1741-2358.2010.00473.x Influence of artificial accelerated ageing on the colour stability of paints used for ocular prosthesis iris painting Objectives:? To evaluate the colour stability of paints used for ocular prosthesis iris painting submitted for accelerated ...

We present volume, density, and tensile property change observed from both naturally and accelerated aged plutonium alloys. Accelerated alloys are plutonium alloys with a fraction of Pu-238 to accelerate the aging process by approximately 18 times the rat...

IGBT accelerated aging data set. A Dataset, Nikunj Oza's Collection - 8 months, 2 weeks ago. Preliminary data from thermal overstress accelerated aging ...

IGBT accelerated aging data set. A Dataset, Nikunj Oza's Collection - 8 months ago. Preliminary data from thermal overstress accelerated aging using the ...

IGBT accelerated aging data set. A Dataset, Nikunj Oza's Collection - 10 months, 2 weeks ago. Preliminary data from thermal overstress accelerated aging ...

Sep 1, 2011 ... The phenolic- bonded flakeboards retained enough strength and stiffness during accelerated aging to indicate they might be used satisfactorily ...

... Accession Number : ADD438667. Title : Accelerated Heat Age Testing of Phenolics: Morphological Changes Related to Fracture and Voids,. ...

... Accession Number : ADD422666. Title : Accelerated Aging of Poly(methyl Methacrylate) Copolymers and Homopolymers,. Corporate Author : ...

... Accession Number : ADA496361. Title : Accelerated Aging Study of PBXN-109 Formulated With Insensitive RDX. Descriptive Note : Briefing charts. ...

Accelerated aging is one of the well-known consequences of exposure to ionizing radiation. This phenomenon is apparent to a greater or lesser degree in all of the populations contaminated by the Chernobyl radionuclides. PMID:20002044

This paper presents evidence that damage to nuclear DNA (nDNA) is a direct cause of aging in addition to the effects of nDNA damage on cancer, apoptosis, and cellular senescence. Many studies show significant nDNA damage with age, associated with declining nDNA repair, and this evidence for the decline of nDNA repair with age is also ...

A technique based on Fourier transform infrared microscope (FT-IRM) was developed to detect the corresponding changes in chemical composition associated with thermostress among aging tissues of the desert moss Tortula desertorum. The results indicated that wild leaves could accelerate the rate of carbohydrate synthesis and decrease the permeability of ...

The effect of UVA-UVB irradiation on the mechanical properties of three different industrial types of polydimethylsiloxane and chlorinated polyethylene samples, used in maxillofacial prostheses, was investigated in this study. Mechanical properties and thermal analysis are commonly used to determine the structural changes and mechanical strength. An aging chamber was used in ...

... Zender, GW (CROSS REFERENCES, Aluminum alloys - Aging (10575.5) AUTHOiMS ... effect of artificial aging on the ... 2i^-T and 2liS-T aluminum alloy ...

... EPDM and EPM rubbers (used in overhead powerline composite insulators), which were submitted to accelerated aging in a Weatherometer ...