水稻外观品质稳定性分析及G×E互作与气候因子的关系

基于AMM I模型,研究了25个水稻品种外观品质性状与环境的交互作用,并对参试品种垩白品质性状的稳定性、G×E互作与气候因子的关系及气候生态适应性进行了探讨。结果表明,稻米长、宽及长宽比的G×E互作效应差异不显著,垩白率和垩白度的G×E互作效应达到了1%的显著水平。在此基础上将参试品种分为稳定性最好垩白适中、稳定性适中垩白较小及稳定性和垩白性状均较差三类。垩白品质性状的iPCA与水稻生育期内的气温、日照、降雨的相关分析表明气候因子是决定G×E互作的一项重要环境因子。据此得到不同品种对气候因子的最佳品质适应性,如品种V 9和V 24(沈农9819和0142)的垩白率对温度较低的环境,V 23(盐优5858)的垩白度对相对寡照高温的环境具有特殊适应性,在实际生产中选择与这些品种有负向互作的地点可获得较低的稻米垩白率和垩白度。

Rare earth complexes with Ge-132 and their catalytic hydrolysis to phosphatide bond of mononucleotide

The complexes of a series of rare earths with Ge-132 have been prepared. The carboxyl anions of Ge-132 molecule were coordinated to rare earth ion with chelate style. In the complexes molecule, the GeO3/2 group of Ge-132 were hydrolyzed to become -Ge(OH)(3) group, and later does:not coordinate with rare earth ions. All of the complexes possess similar properties. In aqueous solution of pH 6 and 50 degrees C, these complexes can obviously selectively catalytically hydrolize the phosphatide bond of 5'-AMP and 5'-dAMP into phosphatic acid and riboside.

The suppression of Ge-132 on the Maillard reaction of BSA by fluorescence spectrum

The fluorescences of BSA and glycosylated BSA were observed respectively. The lambda(cm) of BSA was 340 nm; while the lambda(cm) of glycosylated BSA was 436 nm. Because the fluorescence spectra of them were different greatly, we can observe the suppression of Ge-132 on the Maillard reaction of BSA without any interference of itself. It was showed that the fluorescence intensity of glycosylated BSA increased continuously with the cultured time, Ge-132 may suppress the Maillard reaction of BSA greatly, and the suppressing efficicency would be 32 %. The key site of the Maillard reaction of BSA is free amino groups of alanine residues on N-terminal amino group, besides the epsilon-amino groups of intrachain Lysine residues.

Ge-132稀土配合物及其对单核苷酸磷酯键的催化水解作用

Ｇｅ－１３２是具有广泛生物活性的一元羧酸有机锗倍半氧化物的低聚物，分子中存在类似冠醚的Ｇｅ－Ｏ－Ｇｅ大环结构．因此，有人认为Ｇｅ－１３２的生物活性可能与这种大环结构与体内金属离子形成配合物有关［１］，但尚无直接的实验证据．因此，合成Ｇｅ－１３２稀土配…

荧光法研究Ge-132对牛血清白蛋白Mailard反应的抑制作用

人体内氨基酸及蛋白质的非酶糖化反应（Ｍａｉｌａｒｄ反应）与糖尿病及其并发症的关系已经引起广泛注意［１］．有机锗化合物β－羧乙基锗倍半氧化物（Ｇｅ－１３２）具有预防糖尿病及调节糖代谢的作用［２］．研究Ｇｅ－１３２对Ｍａｉｌａｒｄ反应的抑制作用，对于开发…

荧光法研究 Ge-132 对苯丙氨酸 Maillard 反应的抑制作用

哺乳动物体内氨基酸及蛋白质的非酶糖化反应（Ｍａｉｌａｒｄ反应）与糖尿病及其并发症的关系已引起广泛关注［１］，β－羧乙基锗倍半氧化物（Ｇｅ－１３２）具有预防糖尿病和调节糖代谢的作用［２］，研究Ｇｅ－１３２对Ｍａｉｌａｒｄ反应的抑制作用对于开发防治糖尿病…

Ge-132与稀土离子的配合物及其对单核苷酸磷酯键的催化水解作用

Ge－132的羧酸阴离子与稀土离子螯合配位，生成3：1型配合物。在配合物中，Ge－132的GeO3/2基因水解为Ge（OH）3，并且不参与稀土配位，系列稀土离子配合物的结构性质基本相同，在50℃，pH值为6的水溶液中，该配合物选择性地催化5’－AMP或5’－dAMP的磷酯键水解断裂，生成相应的核苷和磷酸，而不影响碱基与戌糖之1间的苷键。

Synthesis, structures and antitumor activities of beta-phenolester propyl germanium sesquioxides

Eight new compounds of (GeCH2CH (CH3) COOAr)(2)O-3 type were synthesized. Four of them were tested for antitumor activities against Hela cells in vitro, showing considerable tumor inhibitory activities.

CRYSTAL AND MOLECULAR STRUCTURES AND MS ANALYSE OF beta-CARBOXYLETHYL (OR alpha-METHYLETHYL) GERMANIUM TRICHLORIDES

This paper reports the results of the crystal and molecular structures, CI-MS and FAB-MS analyse of Cl3GeCH2CH2COOH and Cl3GeCH(CH3)CH2COOH. The characters and active parts of these molecules are also discussed

The distribution, enrichment and source of potential harmful elements in surface sediments of Bohai Bay, North China

A geochemical study of Bohai Bay surface sediments was carried out to analyze the potential harmful element (PHE: Ge, Mo, In, Sn, Sb,Te, Tl, Bi and V) concentrations, transportation and deposition, enrichment factors and sources. Germanium, Mo, In, Sn, Sb, Te, Tl, Bi and V concentrations in the surface sediments were: 1.43-1.71, 0.52-1.43, 0.04-0.12, 2.77-4.14, 1.14-2.29, 0.027-0.085, 0.506-0.770, 0.27-0.63 and 70.35-115.90 mu g/g, respectively. The distributions of total PHE concentrations, together with sequential extraction analyses, showed that the PHEs were mainly due to natural inputs from the continental weathering delivered to the bay by rivers and atmospheric transportation and deposition. However, high Mo, Sb, Te, Bi and V occurred in non-residual fractions, suggesting some anthropogenic inputs in addition to the natural inputs. Besides sources, the distributions of PHEs were influenced by the coupling of physical, chemical and biological processes. Enrichment factor (EF) was computed for each site for each element in order to assess the polluting elements and the degree of pollution at each site. Results revealed that the EFs were generally lower than 1.0, particularly for Ge, Mo, In, Sn, Tl and V; however, the EFs were higher (>1.5), particularly for Sb, Te and Bi, revealing moderate contamination. (C) 2010 Elsevier B.V. All rights reserved.

扬子地块西南缘铅锌矿床Cd、Ge与Ga富集规律初步研究

扬子地块西南缘分布着大量富含Cd、Ge与Ga的铅锌矿床，已成为我国Pb、Zn及Cd、Ge与Ga矿产资源的重要生产基地。对代表性铅锌矿床进行野外地质调查和系统采样鉴定后．应用电子探针微区分析手段，研究主要矿石矿物闪锌矿、方铅矿和黄铁矿中分散元素的富集特征。结果显示．各类矿床中闪锌矿均相对富集Cd，方铅矿富集Ge与Ga，而黄铁矿中Cd、Ge与Ga的富集系数均相对较低．未呈现出选择性富集的趋势；赋存于震旦纪一寒武纪地层且以脉状、网脉状产出的矿体中闪锌矿的Cd含量明显高于赋存于晚古生代并以层状产出的矿体中闪锌矿的Cd含量。