نتایج جستجو برای: molybdenum diselenide

تعداد نتایج: 14293  

Journal: :journal of nanostructures 2015
a. khajesarvi g. h. akbari

in the present study, nanocrystalline ni50al50-xmox (x = 0, 0.5, 1, 2.5, 5) intermetallic compound was produced through mechanical alloying of nickel, aluminum, and molybdenum powders. alni compounds with good and attractive properties such as high melting point, high strength to weight ratio and high corrosion resistance especially at high temperatures have attracted the attention of many rese...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2002
Susumu Kawakubo Sumito Ichikawa Masaaki Iwatsuki

A speciation scheme of trace molybdenum was proposed for river water based on size fractionation by filtration and ultrafiltration and the catalytic spectrophotometric determination of the reactive molybdenum concentration (CR). The total concentration (CT) of molybdenum was determined by the same method after acid decomposition to obtain the concentration (CT - CR) of unreactive molybdenum. Mo...

Journal: :پژوهش های تولید گیاهی 0
مریم توکلی دانشجوی دانشگاه علوم کشاورزی و منابع طبیعی گرگان کامبیز مشایخی دانشیار گروه باغبانی، دانشگاه علوم کشاورزی و منابع طبیعی گرگان فرشید قادری فر استادیار گروه زراعت، دانشگاه علوم کشاورزی و منابع طبیعی گرگان

one of the important methods of plant propagation in large scale so as genetic manipulation and artificial seed production is somatic embryogenesis technique. the obtained results from this methods related to different factors including condition of culture medium. therefore, the aim of this study conduction were determining the role of molybdenum during carrot petiole somatic embryogenesis. at...

Journal: :Organic & biomolecular chemistry 2012
Letiére C Soares Eduardo E Alberto Ricardo S Schwab Paulo S Taube Vanessa Nascimento Oscar E D Rodrigues Antonio L Braga

The ephedrine-based diselenide appears as a new promiscuous catalyst, able to generate optically active alcohols by addition of organozinc to aldehydes (up to 97% ee), and shows powerful GPx like activity, reducing H(2)O(2) to water in only 16.33 min (eleven times faster than PhSeSePh).

2011
David B. Cordes Guoxiong Hua Alexandra M. Z. Slawin J. Derek Woollins

The title mol-ecule, C(10)H(6)O(4)Se(2), lies on a twofold rotation axis. The Se-Se bond length of 2.305 (3) Å is similar to that in diphenyl diselenide [2.3066 (7) and 2.3073 (10) Å for the P and M isomers, respectively] and longer than that in 1,8-diseleno-naph-thalene [2.0879 (8) Å]. The mol-ecule adopts a gauche conformation with respect to the C=O groups.

Journal: :Journal of visualized experiments : JoVE 2015
Ruei-San Chen Chih-Che Tang Wei-Chu Shen Ying-Sheng Huang

Layer semiconductors with easily processed two-dimensional (2D) structures exhibit indirect-to-direct bandgap transitions and superior transistor performance, which suggest a new direction for the development of next-generation ultrathin and flexible photonic and electronic devices. Enhanced luminescence quantum efficiency has been widely observed in these atomically thin 2D crystals. However, ...

Journal: :The Journal of biological chemistry 1977
J L Johnson H P Jones K V Rajagopalan

A molybdenum cofactor which is capable of reconstituting demolybdosulfite oxidase purified from livers of tungstentreated rats has been identified in rat liver and various organisms. Reconstitution with the rat liver cofactor is directly proportional to cofactor and demolybdoenzyme concentrations and proceeds most efficiently in 0.01 M potassium phosphate buffer, pH 7.4. The activation process ...

Ali Faghihi Zarandi, Asghar Amirri, Majid Akhondipour, Nasser Gommnami, Reza Vazirinejad,

Background: With the spread of nanotechnology, various nanoparticles with new and emerging properties have been produced and the potential toxic effects of the majority of these particles remains still unknown. The present study was conducted to determine the toxicity of Molybdenum Trioxide nanoparticles in blood and body tissues of male Wistar rats. Materials and Methods: Thirty Wistar rats w...

Journal: :Cancer research 1990
H Komada Y Kise M Nakagawa M Yamamura K Hioki M Yamamoto

The influence of dietary molybdenum on esophageal carcinogenesis induced by N-methyl-N-benzylnitrosamine (2.5 mg per kg of body weight once a week for 20 wk s.c.) was studied in male F344 rats. The tumor incidence and tumor development in the esophagus were significantly lower in the rats in the high-molybdenum (2 ppm) diet group than in the rats in the low-molybdenum (0.032 ppm) diet group; i....

2006
Feng Gao Yilin Wang W. T. Tysoe

The ethylene hydrogenation activity is compared for molybdenum oxycarbides, molybdenum carbides and a molybdenum alloy formed by reaction of molybdenum hexacarbonyl with alumina in ultrahigh vacuum using temperature-programmed desorption. It is found that molybdenum oxycarbides are inactive for ethylene hydrogenation. It is shown by forming carbides by reaction between alumina and ethylene that...

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