搜索结果: 31-45 共查到“知识库 生物无机化学”相关记录46条 . 查询时间(3.463 秒)
摘要： 本文对高原鼢鼠和高原鼠兔骨骼中的无机常量元素K、N a、Ca、M g、P 和A l 进行了比较分析。研究结果表明, 高原鼢鼠骨骼中Ca、P、A l 的含量极显著地高于高原鼠兔(P <0.01) ,K 含量高原鼢鼠极显著地低于高原鼠兔(P < 0.001) , N a 和M g 的含量两者间无显著差异(P > 0.05) ; 骨骼各部位元素总量的分布顺序为: 高原鼢鼠下肢骨...
高原鼢鼠骨骼脂肪油的化学成分研究
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2007/10/31
题目：高原鼢鼠骨骼脂肪油的化学成分研究
作者：张哓峰, 张宝琛
中国科学院西北高原生物研究所
关键词：高原鼢鼠骨骼脂肪油; 气相色谱-质谱; 气相色谱-红外
高原鼢鼠和高原鼠兔骨骼中非必需微量元素的测定
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2007/10/31
题目：高原鼢鼠和高原鼠兔骨骼中非必需微量元素的测定
作者：索有瑞 李天才
中国科学院兰州化学物理研究所
关键词：高原鼢鼠; 高原鼠兔; 骨骼; 非必需微量元素
pH值和钙离子对尖吻蝮蛇抗血小板凝集素二级结构的影响（Effects of pH Value and Ca2+ Ion on the Secondary Structure of Agkisacutacin from Agkistrodon Acutus Venom）
抗血小板凝集素 二级结构 圆二色谱 拉曼光谱 红外光谱
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2010/8/25
尖吻蝮蛇毒中抗血小板凝集素是凝血因子IX/凝血因子X结合蛋白，它具有抗凝血和抑制血小板凝集双重活性。用红外光谱、拉曼光谱和CD谱研究了抗血小板凝集素的二级结构以及pH值和钙离子对其二级结构的影响。用CD谱测得，在水溶液中，抗血小板凝集素的主要骨架构象为β-折叠(26.3%)和α-螺旋(19.6%)结构。拉曼光谱显示，在粉末状态，其α-螺旋含量显著降低。CD谱还表明，抗血小板凝集素在pH值3.0～1...
Secondary Metabolites from Phlomis syriaca and Their Antioxidant Activities
Phlomis syriaca Lamiaceae Iridoid glucosides Phenylethanoid glycosides
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2010/4/19
An iridoid glucoside, lamiide (1); 4 phenylethanoid glycosides, acteoside (2), b-OH acteoside (3), leucosceptoside A (4) and samioside (5); a caffeic acid ester, chlorogenic acid (6); 2 flavone glucos...
pH值和金属离子对尖吻蝮蛇抗凝血因子Ⅱ二级结构的影响（The Effects of pH and Metal Ions on the Secondary Structure of Anticogulation Factor Ⅱ Studed by CD Spectroscopy）
抗凝血因子Ⅱ 酸度(pH) 二级结构 圆二色谱
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2010/8/25
圆二色谱(CD谱)测量表明，尖吻蝮蛇抗凝血因子Ⅱ(ACF Ⅱ)与抗凝血因子Ⅰ(ACF Ⅰ)的二级结构十分相似，它们的主要骨架构象都为反平行β-折叠和α-螺旋结构。pH值对天然ACF Ⅱ的构象有一定的影响，pH值从3到10增大时，α-螺旋含量逐渐减少，反平行β-折叠含量逐渐增大。钙和其他二价金属离子对ACF Ⅱ的骨架结构没有明显影响。三价稀土离子使ACF Ⅱ的α-螺旋含量升高，同时降低其β-转角和β...
Pyranocoumarins from Seseli gummiferum subsp. corymbosum Growing in Turkey
Umbelliferae corymbocoumarin angular-type pyranocoumarin Seseli gummiferum Pall. ex Sm. subsp. corymbosum (Boiss. & Heldr.) P.H. Davis
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2010/4/20
Seseli gummiferum Pall. ex Sm. subsp. corymbosum (Boiss. & Heldr.) P.H. Davis (Syn: S. corymbosum Boiss. & Heldr.) (Umbelliferae) collected in southern Anatolia was investigated for the presence of co...
Catalytic Spectrophotometric Determination of Manganese in Some Medicinal Plants and Their Infusions
manganese determination catalytic spectrophotometric method medicinal plants infusions
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2010/4/21
The catalytic effect of manganese (II) on the oxidation of the dye 1,3-Dimethyl- 2 [4-N (N,N-dimethylamino) phenylazo] imidazolium perchlorate (BR) with potassium periodate in the presence of 1,10-phe...
Changes in Chlorophyll-Carotenoid Contents, Antioxidant Enzyme Activities and Lipid Peroxidation Levels in Zn-Stressed Mentha pulegium
Antioxidant Enzymes Chlorophyll-Carotenoid Mentha pulegium LPO Zn
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2010/4/21
Changes in Chlorophyll-Carotenoid Contents, Antioxidant Enzyme Activities and Lipid Peroxidation Levels in Zn-Stressed Mentha pulegium.
The Membrane Potentials of Periderm and Cuticular Membranes
Membrane potential periderm membrane cuticular membrane fixed charge concentration asymmetric potential
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2010/4/22
The membrane potentials of periderm and cuticular membranes were measured with KCI and NaCl solution using Ag/AgCI electrodes. For the electromotive force (emf) measurements, the concentration in both...
Phytochemical Studies at the Bulbs of Ornithogalum Umbellatum L.
Ornithogalum umbellatum Liliaceae bulbs new aromatic compounds
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2010/4/22
Phytochemical examination of the bulbs of Ornithogalum umbellatum L. led to the isolation a new steroidal compound. Its structure was determined to be 3-O-(2'-methoxy-4'-(2-pentenal))-phenyl sitostero...
Selenium Speciation in Karakaya Dam Lake's Water (Malatya-Turkey)
Selenium speciation Atomic absorption spectroscopy Enrichment Trace element
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2010/4/23
Concentrations of total inorganic selenium, Se(IV), Se(VI) and organically bonded selenium from samples of Karakaya dam lake\\\'s water were determined using ammonium pyrollidine dithio carbamate (APD...
Evaluation of sample pre-treatment procedures for the determination of Cr, Ni and V in biological matrices by ETAAS
decomposition electrothermal atomic absorption spectrometry Cr Ni V determination biological materials
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2010/4/23
Electrothermal atomic absorption spectrometry (ETAAS) was applied for the determination of chromium, nickel and vanadium in biological materials (earthworms, feather, lucerne). Three different decompo...
BSA-羟基磷灰石可溶性复合物的FTIR光谱。