-
- دوشنبه تا شنبه: 10:00 - 16:00 / یکشنبه تعطیل است
The molecular‐beam‐epitaxial technique has been used to grow a high‐quality GaAs negative electron affinity photocathode structure with a p‐type beryllium doping concentration of 3×10 1 9 cm − 3.The reflection mode photoemission characteristics such as the white light sensitivity, the quantum efficiency, the minority carrier (electron) …
به خواندن ادامه دهید
Gallium arsenide-based multijunction solar cells are the most efficient solar cells to date, reaching the record efficiency of 42.3% with a triple-junction metamorphic cell [48].They were originally developed for special applications such as satellites and space investigation. Their high efficiency comes from the possibility to grow three or more junctions for the …
به خواندن ادامه دهید
Gallium arsenide is of importance technologically because of both its electrical and optical properties. It is well suited for a wide range of device applications and as a consequence …
به خواندن ادامه دهید
For gallium arsenide itself, no data on human cancer were available, and the evidence of carcinogenicity in experimental animals was considered limited on the basis of increased incidence of bronchioloalveolar neoplasms observed in rats in one study. ... Monographs Volume 84; 1987, Supplement 7). The gallium moiety may be …
به خواندن ادامه دهید
We are pleased to announce IARC Monographs Meeting 137: Hydrochlorothiazide, voriconazole, and tacrolimus, which will be held on 5–12 November... More 24.10.2023. NEWS Aspartame hazard and risk assessment results released. IARC website . IARC Monographs Newsletter. Find out more ...
به خواندن ادامه دهید
Gallium arsenide (GaAs), for example, is a binary III-V compound, which is a combination of gallium (Ga) from column III and arsenic (As) from column V. Ternary compounds can be formed by elements from three different columns—for instance, mercury indium telluride (HgIn 2 Te 4), a II-III-VI compound.
به خواندن ادامه دهید
Gallium arsenide has a similar structure to silicon and is a useful silicon substitute for the electronics industry. It is an important component of many semiconductors. It is also used in red LEDs (light emitting diodes) because of its ability to convert electricity to light. Solar panels on the Mars Exploration Rover contained gallium arsenide.
به خواندن ادامه دهید
Gallium Arsenide, Indium Phosphide and Vanadium Pentoxide. This publication represents the views and expert opinions of an IARC Working Group on the Evaluation of Carcinogenic Risks to Humans, which met in Lyon, 7–14 October 2003 2006 IARC Monographs on the Evaluation of Carcinogenic Risks to Humans WORLD HEALTH ORGANIZATION …
به خواندن ادامه دهید
Cover design: Georges Mollon, IARC 1 1 Leaded gasoline: tetraethyl lead has been used as an additive in gasoline for decades. 2 Exposure to lead-based paint in older homes: a major source of lead exposure for children 3 Products like surma and kohl, used in some cultures for cosmetic purposes and in traditional medicine, often contain large amounts of lead.
به خواندن ادامه دهید
IARC Monographs on the Evaluation of Carcinogenic Risks to Humans Volume 86 Cobalt in Hard Metals and Cobalt Sulfate, Gallium Arsenide, Indium Phospide and Vanadium …
به خواندن ادامه دهید
Cobalt in Hard Metals and Cobalt Sulfate, Gallium Arsenide, Indium Phosphide and Vanadium Pentoxide/IARC Working Group on the Evaluation of Carcinogenic Risks to …
به خواندن ادامه دهید
Gallium Arsenide. Molecular formula. AsGa. Molecular weight. 144.64. Percent composition. As 51.80%, Ga 48.20% Please choose one of the options below to gain …
به خواندن ادامه دهید
What is Gallium Arsenide? Gallium arsenide (GaAs) is a compound built from the elements gallium and arsenic. It is often referred to as a III-V compound because gallium and arsenic are in the III group and V group of the periodic table, respectively. Figure 1. The gallium arsenide compound. Brown represents gallium and purple …
به خواندن ادامه دهید
Gallium arsenide holds record efficiency for single junction solar cells, but high production costs limit applications. Here Metaferia et al. show high quality GaAs and GaInP at rates exceeding ...
به خواندن ادامه دهید
Introduction to the Monographs on Gallium Arsenide and Indium Phosphide. Gallium Arsenide 1. Exposure Data 2. Studies of Cancer in Humans 3. Studies of Cancer in Experimental Animals 4. Other Data …
به خواندن ادامه دهید
22 important, and the Monographs identify cancer hazards even when risks are very low at 23 current exposure levels, because new uses or unforeseen exposures could engender risks that 24 are significantly higher. 25 In the Monographs, an agent is termed 'carcinogenic' if it is capable of increasing the
به خواندن ادامه دهید
Gallium arsenide (GaAs), for example, is a binary III-V compound, which is a combination of gallium (Ga) from column III and arsenic (As) from column V. In crystal: Conducting properties of semiconductors. In gallium arsenide the critical concentration of impurities for metallic conduction is 100 times smaller than in silicon.
به خواندن ادامه دهید
Cobalt in hard metals and cobalt sulfate, gallium arsenide, indium phosphide and vanadium pentoxide. 2006;86:1-294. IARC Working Group on the Evaluation of Carcinogenic Risks to Humans. PMC4781610. gallium arsenide. vanadium pentoxide. cobalt sulfate. indium phosphide.
به خواندن ادامه دهید
c In reaching an overall evaluation of Group 1, the working group noted the potential for gallium arsenide to cause cancer through releases of a small amount of its arsenic, which behaves as inorganic arsenic at the sites where it is distributed. Arsenic and arsenic compounds have been evaluated as IARC Group 1, carcinogenic to humans. For arsenic …
به خواندن ادامه دهید
Globally, primary gallium is recovered as a byproduct of processing bauxite and zinc ores. One company in Utah recovered and refined high-purity gallium from imported low-grade primary gallium metal and new scrap. Imports of gallium metal and gallium arsenide (GaAs) wafers were valued at about $700,000 and $170 million, respectively.
به خواندن ادامه دهید
The typical impurity levels of gallium zone refined in this manner are given in Table 6.12.1 6.12. 1. Table 6.12.1 6.12. 1: Typical analysis of gallium obtained as a side product from the Bayer process. Element. Bayer process (ppm) After acid/base leaching (ppm) 500 zone passes (ppm) aluminum. 100-1,000.
به خواندن ادامه دهید
Cobalt in hard metals and cobalt sulfate, gallium arsenide, indium phosphide and vanadium pentoxide Author(s) International Agency for Research on Cancer :: IARC Year. 2006 Publisher. International Agency for Research on Cancer ... IARC Monographs on the Evaluation of Carcinogenic Risks to Humans, vol. 86 ISBN. 9789283212867 Conference …
به خواندن ادامه دهید
Biomonitoring of exposure to gallium arsenide by measuring arsenic in human tissues or body fluids has several limitations. Firstly, gallium arsenide has a low solubility and is …
به خواندن ادامه دهید
Princeton researchers have created the world's purest sample of gallium arsenide, a semiconductor used in devices that power such technologies as cell phones and satellites. The team baked their material down to one impurity for every 10 billion atoms, reaching a level of quality that outstrips even the world's purest silicon sample used in ...
به خواندن ادامه دهید
GALLIUM ARSENIDE, INDIUM PHOSPHIDE AND VANADIUM PENTOXIDE Lyon, 7–14 October 2003 LIST OF PARTICIPANTS pp 001-006 ok.qxp 31/05/2006 08:37 Page 3. 4 IARC MONOGRAPHS VOLUME 86 Inge Mangelsdorf, Chemikalienbewertung, Fraunhofer-Institut fur Toxikologie und Experi-mentelle Medizin, Nikolai-Fuchs-Strasse 1, ...
به خواندن ادامه دهید
Introduction to the Monographs on Gallium Arsenide and Indium Phosphide - Cobalt in Hard Metals and Cobalt Sulfate, Gallium Arsenide, Indium Phosphide and Vanadium …
به خواندن ادامه دهید
Two compounds evaluated in this volume of the IARC Monographs, gallium arsenide and indium phosphide, are predominantly used in the semiconductor industry. However, only parts of the workforce in this industry are exposed to these compounds, and there is also potential for exposure to several other carcinogens in this industry. As none of the …
به خواندن ادامه دهید
IARC Vol 86: Cobalt in Hard Metals and Cobalt Sulfate, Gallium Arsenide, Indium Phosphide and Vanadium Pentoxide p. 197 (2006); IARC Monographs provide critical reviews of data on carcinogenicity for agents to which humans are known to be exposed and on specific exposure situations.[IARC. Monographs on the Evaluation of the …
به خواندن ادامه دهید
MONOGRAPHS ON GALLIUM ARSENIDE AND INDIUM PHOSPHIDE. INTRODUCTION TO THE MONOGRAPHS ON GALLIUM ARSENIDE AND INDIUM PHOSPHIDE. …
به خواندن ادامه دهید
166 IARC MONOGRAPHS VOLUME 86 pp 163-196.qxp 31/05/2006 10:18 Page 166. that much of it will not be mined for many decades; hence, most of the gallium in the ... Gallium arsenide single crystals are more difficult to fabricate than those of silicon. With silicon, only one component needs to be controlled, whereas with gallium arsenide, ...
به خواندن ادامه دهید