GaP：（Bi,N）的时间分辨光致发光谱

在9.3K到83K温度范围内测量了GaP:(Bi)和GaP:(Bi,N)样品的时间分辨光致发光谱。实验结果表明,在GaP:(Bi,N)中,由孤立N中心和NN_i(i≥3)中心到Bi中心的能量转移过程导致Bi发射带的增强。     

Importance de l'étude des transferrines sériques dans la différenciation des espèces. Résultats acquis dans le genreAnguilla

Summary A study of transferrins of the eel by paper electrophoresis, using a serum labelled with Iron 59, was carried out on 340 different individuals. The phenotypes of transferrins thus determined are differently distributed in the European eel (Anguilla anguilla) and in the American eel (A. rostrata); the difference between these 2 species is thereby made clear. Within the same species (A. anguilla), it is also possible to observe different distributions of phenotypes according to the geographical origin of the individuals under study (French Atlantic coasts, French and Greek Mediterranean coasts).     

Regression Modeling with ANN and Its Application in Analyzing Dynamics of Groundwater Level

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Étude immunologique des Haptoglobines humaines individuelles

Summary Immunological studies of the haptoglobin-hemoglobin complexes of different serum groups show different mobility by immuno-electrophoretic technique, and the antigenic relationship of these haptoglobins.     

反应性染料结构与性能间的关系Ⅵ.应用SCF-MO方法研究反应性染料的活泼性

利用NMO方法和SCF-MO方法,计算了14个模拟化合物(模拟反应性染料和模拟反应性染料-纤维化合物)的超离域度S_(rN)、电荷密度。讨论了利用SCF-MO方法计算S_(rN)的过程。基于Klopman理论和福井谦一关于“超离域度”的理论,本文认为,反应性染料及其染色物的磁性水解反应过程,属于轨道控制类型。     

Volcanic carbon dioxide vents show ecosystem effects of ocean acidification

The atmospheric partial pressure of carbon dioxide (p(CO(2))) will almost certainly be double that of pre-industrial levels by 2100 and will be considerably higher than at any time during the past few million years. The oceans are a principal sink for anthropogenic CO(2) where it is estimated to have caused a 30% increase in the concentration of H(+) in ocean surface waters since the early 1900s and may lead to a drop in seawater pH of up to 0.5 units by 2100 (refs 2, 3). Our understanding of how increased ocean acidity may affect marine ecosystems is at present very limited as almost all studies have been in vitro, short-term, rapid perturbation experiments on isolated elements of the ecosystem. Here we show the effects of acidification on benthic ecosystems at shallow coastal sites where volcanic CO(2) vents lower the pH of the water column. Along gradients of normal pH (8.1-8.2) to lowered pH (mean 7.8-7.9, minimum 7.4-7.5), typical rocky shore communities with abundant calcareous organisms shifted to communities lacking scleractinian corals with significant reductions in sea urchin and coralline algal abundance. To our knowledge, this is the first ecosystem-scale validation of predictions that these important groups of organisms are susceptible to elevated amounts of p(CO(2)). Sea-grass production was highest in an area at mean pH 7.6 (1,827 (mu)atm p(CO(2))) where coralline algal biomass was significantly reduced and gastropod shells were dissolving due to periods of carbonate sub-saturation. The species populating the vent sites comprise a suite of organisms that are resilient to naturally high concentrations of p(CO(2)) and indicate that ocean acidification may benefit highly invasive non-native algal species. Our results provide the first in situ insights into how shallow water marine communities might change when susceptible organisms are removed owing to ocean acidification.