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1.
Applications of platinum complexes as phosphorescent emitters in high efficiency organic light-emitting diodes (OLEDs) were
shortly discussed in this paper. Key recent studies on highly efficient blue, green, red and white-phosphorescent OLEDs based
on Pt complexes are presented in terms of efficiency and color quality. 相似文献
2.
分析了八面体配合物和四面体配合物畸变的原因,给出了判断八面体配合物和四面体配合物畸变的一般方法:配合物是否发生畸变要看中心离子电子云是否对称分布,若对称分布,就具有规则的八面体或四面体构型,否则,将会发生变形. 相似文献
3.
采用水溶液法,合成了铁配合物[Fe（C12H8N2）3]（C6H6N2S2O6）.4H2O,该配合物晶体属三斜晶系,P-1空间群,晶胞参数是：a=12.8789（12）,b=13.3808（13）,c=14.859（2）,α=104.558（2）°,β=100.780（2）°,γ=107.5760（10）°,V=2264.8（5）3,Z=2.铁离子周围有6个由1,10-邻菲罗啉提供的氮原子与之配位形成畸变的八面体的配位构型.相邻结构单元中的邻菲罗啉分子存在着弱的π-π堆积作用,没有参与配位的邻苯二胺-3,5-二磺酸根离子与结晶水分子通过氢键将配合物扩展为二维超分子结构. 相似文献
4.
为了给消费者提供乳制品质量参考,对山东省某乳制品企业的原料乳和成品乳随机抽样,用原子吸收光谱法和原子荧光光谱法测定了其中铅、铬、汞和砷等重金属的含量．结果表明,该企业的原料乳和成品乳都存在不同程度的铅、铬、汞和砷等重金属污染,其中,部分原料乳铅含量严重超出国家食品质量安全标准,成品乳铅含量轻微超标． 相似文献
5.
BackgroundArsenic contamination in the ground water of rural India is a recurrent problem and decontamination is mostly based on the chemical or physical treatments until now. Microbial bioremediation is eco-friendly, cheap, time-efficient and does not produce any toxic by-products.ResultIn the present study, a high arsenic tolerant bacteria Brevundimonas aurantiaca PFAB1 was isolated from Panifala hot spring located in West Bengal, India. Previously Panifala was also reported to be an arsenic-rich hot spring. B. aurantiaca PFAB1 exhibited both positive arsenic reductase and arsenite oxidase activity. It was tolerant to arsenite up to 90 mM and arsenate up to 310 mM. Electron microscopy has proved significant changes in cellular micromorphology and stalk appearance under the presence of arsenic in growth medium. Bioaccumulation of arsenic in As (III) treated cells were 0.01% of the total cell weight, while 0.43% in case of As (V) treatment.ConclusionsAll experimental lines of evidence prove the uptake/accumulation of arsenic within the bacterial cell. All these features will help in the exploitation of B. aurantiaca PFAB1 as a potent biological weapon to fight arsenic toxicity in the near future.How to cite: Banerjee A, Sarkar S, Gorai S, et al. High arsenic tolerance in Brevundimonas aurantiaca PFAB1 from an arsenic-rich Indian hot spring. Electron J Biotechnol 2021:52. https://doi.org/10.1016/j.ejbt.2021.05.006 相似文献
6.
合成了2-氨甲基吡啶缩2,4-二羟基苯甲醛 Schiff碱及其 Cd（II）、Ni（II）配合物,利用红外光谱、紫外光谱、热重分析、元素分析及摩尔电导对配合物结构进行了表征,根据表征结果推测化合物的组成为[CdL（H2 O）3]NO3、[NiL（H2O）]NO3（HL＝ C13H13N2O2）,并研究了该化合物的荧光性和抗氧化活性。 相似文献
7.
过渡金属钯催化的Heck反应是碳碳偶联反应中最重要的反应之一．绿色化学是当前化学领域研究的热点和前沿,离子液体是理想的绿色溶剂．近年来在离子液体中进行Heck反应受到广泛关注并取得了一定进展．文巾就近几年离子液体中的Heck反应进行了综述． 相似文献
8.
Cynthia Jane A. V. Nerurkar F. R. Karjodkar 《Indian journal of clinical biochemistry : IJCB》2007,22(2):114-117
Oral Cancer is one of the five leading sites of cancer in Indian population. The circulating immune complexes were investigated
in 100 serum samples of 60 oral cancer patients having different grades of the disease and 40 patients with precancerous lesions
obtained from Nair Hospital Dental collage, Mumbai. The results obtained were compared with those of group of 40 healthy blood
donors. Elevated levels of Circulating Immune Complexes were observed in oral cancer patients and patients with oral precancerous
lesions. 92% positive samples were observed in well differentiated squamous cell carcinoma whereas 100% positive samples were
observed in both moderately and poorly differentiated squamous cell carcinoma. Oral leukoplakia and oral submucous fibrosis
showed 15% and 90% positivity respectively. Increased level of Circulating Immune complexes in high grade tumor suggest that
Circulating Immune complexes is likely to contribute in evaluating the degree of malignancy, but follow up study is needed
to draw any conclusion regarding it's prognostic role 相似文献
9.
论产学研联合技术创新风险承担的合理性 总被引：1，自引：0，他引：1
本文认为风险承担不够合理是目前制约产学研联合技术创新发展的重要问题，并结合调查对该问题进行了认识、能力、制度和支持等方面的分析，提出了相应的解决办法。 相似文献
10.
Study on arsenic level in ground water of Delhi using hydride generator accessory coupled with atomic absorption spectrophotometer 总被引：1，自引：0，他引：1
Sanjeev Lalwani T. D. Dogra D. N. Bhardwaj R. K. Sharma O. P. Murty Aarti Vij 《Indian journal of clinical biochemistry : IJCB》2004,19(2):135-140
Surveillance of drinking water is essentially a health measure intended to protect the public from water borne diseases. Hydride
generator accessory coupled with atomic absorption spectrophotometer was used to analyze arsenic level in 49 ground water
samples collected from different areas of Delhi. Arsenic level in ground water samples was in the range of 0.0170 to 0.100
ppm (Mean-0.0431, Standard Deviation-0.0136, Std. error of Mean-0.00194) with minimum concentration at Raney Well No. 7 (0.0170
ppm) and maximum at Kotla Mubarak Pur (0.100 ppm). Arsenic containing sediments and percolation of chemicals into soil as
the result of dumping of garbage rich in chemicals into open landfills could be the possible source of arsenic in ground water
of Delhi. Extensive survey and continuous monitoring is required to be made to assess the magnitude of problem and earlier
intervention. 相似文献