نتایج جستجو برای: organic compounds cnh2n 2

تعداد نتایج: 2831252  

Journal: :Chemical reviews 2001
S D Richardson

A. Organic Analyses 218 1. General Organic Analyses 218 2. Pesticides 219 3. PAHs and PCBs 221 4. Dioxin 222 5. VOCs 223 6. Textile Dyes 223 7. Surfactants 223 8. Disinfection Byproducts 224 9. Taste and Odor Compounds 226 10. Algal and Bacterial Toxins 226 11. Other Organic Pollutants 227 B. Inorganic Analyses 229 1. Disinfection Byproducts 229 2. Perchlorate and Dissolved Gases 230 3. Multipl...

Journal: :Autoimmunity reviews 2005
Said Havarinasab Per Hultman

Based on in vitro studies and short-term in vivo studies, all mercurials were for a long time considered as prototypic immunosuppressive substances. Recent studies have confirmed that organic mercurials such as methyl mercury (MeHg) and ethyl mercury (EtHg) are much more potent immunosuppressors than inorganic mercury (Hg). However, Hg interacts with the immune system in the presence of a susce...

Journal: :Plant physiology 1949
R M Muir C H Hansch A H Gallup

A large and diverse group of organic compounds is reported to "regulate" plant growth. Many of the determinations of growth regulation, however, do not measure the accelerating effects on growth but the inhibition of growth or toxicity effects. Such evidence does not suffice to identify the substances as growth regulators which may either accelerate or inhibit the growth process depending upon ...

2003
R. MARCUS Noyes

The last Faraday Society Discussions on Electrode Processes were held in 1947 and marked the onset of an extensive fruitful post-war development of fast reaction techniques in electrochemistry. Considerable information has since been obtained on rate constants of simple inorganic electron transfers, paralleling a similar development in homogeneous reactions, and on electron transfer theory. A t...

2016
Urban J. Wünsch Kathleen R. Murphy Colin A. Stedmon

Citation: Wünsch UJ, Murphy KR and Stedmon CA (2016) Corrigendum: Fluorescence Quantum Yields of Natural Organic Matter and Organic Compounds: Implications for the Fluorescence-based Interpretation of Organic Matter Composition. Front. Mar. Sci. 3:9. doi: 10.3389/fmars.2016.00009 Corrigendum: Fluorescence Quantum Yields of Natural Organic Matter and Organic Compounds: Implications for the Fluor...

M. Hussain, S. Mahboob, S. Nadeem, Z. Iqbal,

Volatile organic compounds in farmed and wild rohu, Labeo rohita, were extracted by Likens-Nickerson concurrent distillation apparatus. The farmed raised rohu of two weight categories designated as FW1 (1001-1200g) and FW2 (501-700g) were procured from the Fish Seed Hatchery, Faisalabad. Concurrently, wild rohu of two weight categories designated as WW1 (1001-1200g) and WW2 (501-700g) were capt...

2007
FRANK MCCAPRA FRANK McCAPRA

The chemiluminescence of organic compounds in solution is briefly surveyed with some emphasis on the mechanisms which result in relatively efficient population of an excited state of a product molecule. This is done in terms of the relation = x 'E 1F with particular reference to peroxide compositions. iNTRODUCTION The study of chemiluminescence mechanism in a persistent and systematic fashion i...

2005
Akira Uchida Rumiko Sakurai Tetsutaro Hattori Masanori Yamaura Muharrem Dinçer

C293 physico-chemical properties. NN414 is a very weak acid with pKa = 8.5, log P = 1.6, and molar weight Mw = 291.8 g/mol. Two true polymorphs, A and B, of this compound have been identified. Polymorph A crystallizes in needleshaped crystals with a triclinic unit cell by precipitation from a variety of solvents such as acetic acid, acetonitrile, diluted ammonia, methanol, N-methyl-pyrrolidone,...

Journal: :Angewandte Chemie 2009
Lantao Liu Wen-Xiong Zhang Chao Wang Congyang Wang Zhenfeng Xi

Cyclic dianions are considered to be useful synthons for the construction of a wide variety of cyclic organic compounds and organometallic complexes. However, reported patterns of substituted cyclic dianions are very much limited owing to the lack of synthetic methods. Furthermore, information on the structure of dianion species is very rare, which also to some extent blocks the development of ...

Journal: :Natural product reports 2002
Mark A Sephton

The carbonaceous chondrite meteorites are fragments of asteroids that have remained relatively unprocessed since the formation of the solar system 4.6 billion years ago. These carbon-rich objects contain a variety of extraterrestrial organic molecules that constitute a record of chemical evolution prior to the origin of life. Compound classes include aliphatic hydrocarbons, aromatic hydrocarbon...

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