搜索结果: 136-150 共查到“理学 biological”相关记录232条 . 查询时间(0.062 秒)
Synthesis and Biological Activity of 4-(4-Hydroxybenzylidene)-2- (substituted styryl) oxazol-5-ones and Their o-glucosides
Oxazolone a -acetobromoglucose decetylation o-glucosides antimicrobial antifungal activity
2010/4/9
The 4-(4-hydroxybenzylidene)-2-methyl oxazol-5-ones 1 were treated with various aldehydes in the presence of acetic acid to form 4-(4-hydroxybenzylidene)-2-(substituted styryl) oxazol-5-ones 2a-i, whi...
Microbiology and atmospheric processes:biological,physical and chemical characterization of aerosol particles
Microbiology atmospheric processes chemical characterization aerosol particles
2010/1/19
The interest in bioaerosols has traditionally been linked to health hazards for humans, animals and plants. However, several components of bioaerosols exhibit physical properties of great significance...
Symposium of Nuclear Magnetic Resonance for Biological Macromolecules, 2009（生物大分子核磁共振研讨会）
物大分子 核磁共振 研讨会
2009/4/20
“Symposium of Nuclear Magnetic Resonance for Biological Macromolecules, 2009” will be held from June 25th to June 29th, 2008 in the city of Hefei, Anhui, P. R. China, organized by University of Scienc...
An evaluation of iron bioavailability and speciation in western Lake Superior with the use of combined physical, chemical, and biological assessment
iron bioavailability western Lake Superior
2014/4/18
An iron-dependent cyanobacterial bioreporter (Synechococcus strain KAS101) was used in unison with sizefractionated iron content (.0.45, ,0.45, ,0.02 mm), and chemical characterization of iron complex...
Biological consumption of dimethylsulfide (DMS) and its importance in DMS dynamics in the Ross Sea, Antarctica
dimethylsulfide DMS dynamics Ross Sea
2014/4/18
We studied the biological consumption of dimethylsulfide (DMS) and its role in controlling DMS
concentrations in the Ross Sea, Antarctica, during the spring (Nov) and summer (Jan) of 2005. Surface DM...
Variability of biological production in low wind-forced regional upwelling systems: A case study off southeastern Australia
Variability of biological production regional upwelling systems
2014/4/17
Temporal variability of upwelling activity and primary production is examined for a southeastern Australian
upwelling system off the Bonney Coast (36.5uS–38.5uS, 138uE–142uE). Three indices of upwell...
Symposium of Nuclear Magnetic Resonance for Biological Macromolecules, 2009 （生物大分子核磁共振研讨会）
生物大分子 核磁共振
2009/3/31
“Symposium of Nuclear Magnetic Resonance for Biological Macromolecules, 2009” will be held from June 25th to June 29th, 2008 in the city of Hefei, Anhui, P. R. China, organized by University of Scien...
Seasonality, water quality trends and biological responses in four streams in the Cairngorm Mountains, Scotland
hydrochemistry hydrology trends
2009/3/24
The chemical composition and invertebrate communities found in four streams in the Cairngorms, Scotland, were monitored between 1985-1997. Stream waters were mildly acidic (mean pH ca. 6.5), with low ...
Short-scale temporal variability of physical,biological and biogeochemical processes in the NW Mediterranean Sea:an introduction
Short-scale temporal variability biogeochemical processes NW Mediterranean Sea
2010/1/19
In the framework of the PROOF-PECHE project (http://www.obs vlfr.fr/proof/vt/op/ec/peche/pec.htm) a multi-disciplinary team performed experiments and collected samples during the DYNAPROC 2 cruise abo...
Synthesis and Biological Activity of Allosteric Modulators of GABAB Receptors. Part 4. Synthesis of Potentially Fluorescent Acridines and Conformationally Restricted N-(arylpropyl)-1-arylethylamines
Fendiline analogues acridines acridones aminotetralins aminoindanes GABA
2010/4/15
A series of 8 new derivatives of fendiline was prepared for evaluation as allosteric modulators of GABAB receptors: 4 based on acridine and 4 with restricted distance between the 2 aryl moieties.
Spatial and temporal variations in dissolved and particulate organic nitrogen in the equatorial Pacific:biological and physical influences
Spatial and temporal variations organic nitrogen equatorial Pacific
2010/1/18
To quote Libby and Wheeler (1997), "we have only a cursory knowledge of the distributions of dissolved and particulate organic nitrogen" in the equatorial Pacific. A decade later, we are still in need...
The CO2 exchange of biological soil crusts in a semiarid grass-shrubland at the northern transition zone of the Negev desert,Israel
CO2 exchange biological soil crusts semiarid grass-shrubland transition zone
2010/1/18
Biological soil crusts (BSC) contribute significantly to the soil surface cover in many dryland ecosystems. A mixed type of BSC, which consists of cyanobacteria, mosses and cyanolichens, constitutes m...
Microbiology and atmospheric processes:chemical interactions of primary biological aerosols
Microbiology atmospheric processes chemical interactions primary biological aerosols
2010/1/18
This paper discusses the influence of primary biological aerosols (PBA) on atmospheric chemistry and vice versa through microbiological and chemical properties and processes. Several studies have show...
Synthesis, Spectroscopic and Biological Investigation of Cyclic Octapeptide: Cherimolacyclopeptide G
Cyclic octapeptide cherimolacyclopeptide G antibacterial activity antifungal activity anthelmintic activity cytotoxicity
2010/4/16
A natural cyclic octapeptide cherimolacyclopeptide G (8) was synthesized by coupling of tetrapeptide units Boc-Gly-Ala-Val-Pro-OMe (5) and Boc-Ile-Tyr-Ala-Pro-OMe (6) after proper deprotection at carb...
Biological Effectiveness of Methionine Hydroxy-analogue Calcium Salt in Relation to DL-Methionine in Broiler Chickens
Broiler Methionine Sources Relative Efficiency Performance
2016/4/28
Two feeding trials were conducted to assess the relative bioavailability (RBV) of methionine hydroxy analogue calcium salt (MHA-Ca) in comparison to DL-methionine (DL-Met). Male Ross 308 (1-38 days) a...