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Science in China Series B-Chemistry, Biological, Agricultural, Medical & Earth Sciences最新文献

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小麦条锈病(Puccinia striiformis)慢锈品种抗性组份的研究I 小麦条锈病(Puccinia striiformis)慢锈品种抗性组份的研究I
Science in China Series B-Chemistry, Biological, Agricultural, Medical & Earth Sciences Pub Date : 1988-01-10 DOI: 10.1360/ZB1988-18-1-51
骆勇 曾士迈
{"title":"小麦条锈病(Puccinia striiformis)慢锈品种抗性组份的研究I","authors":"骆勇 曾士迈","doi":"10.1360/ZB1988-18-1-51","DOIUrl":"https://doi.org/10.1360/ZB1988-18-1-51","url":null,"abstract":"1984,1985两年在田间测定了6个小麦品种与3个条锈菌小种组合在不同生育时期下的抗病性组份:侵染机率、产孢量、潜育期、病斑扩展速度和传染期。5个慢锈品种分别同对照相比,在5个组份上的差异均极显著,品种间差异方差占总方差的绝大部分。各组份中,品种×小种互作或不显著,或虽显著但在总方差中所占比例很小。各品种组份参值测定结果和各品种田间流行表观速率是相符的。","PeriodicalId":223601,"journal":{"name":"Science in China Series B-Chemistry, Biological, Agricultural, Medical & Earth Sciences","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121333156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Interaction and regulation of plasminogen activators and their inhibitor in rat follicles during periovulatory periods. 大鼠卵泡围排卵期纤溶酶原激活剂及其抑制剂的相互作用和调控。
Science in China Series B-Chemistry, Biological, Agricultural, Medical & Earth Sciences Pub Date : 1988-01-10 DOI: 10.1360/YB1988-31-1-47
Liu Yx
{"title":"Interaction and regulation of plasminogen activators and their inhibitor in rat follicles during periovulatory periods.","authors":"Liu Yx","doi":"10.1360/YB1988-31-1-47","DOIUrl":"https://doi.org/10.1360/YB1988-31-1-47","url":null,"abstract":"Ovarian follicles produce two types of plasminogen activator (tPA and uPA), and their inhibitor (PAI). We have examined the interaction and regulation of these factors in ovarian intact follicles as well as granulosa and theca-interstitial cells. The results show that only tPA, but not uPA, is regulated by the gonadotropins and reaches maximum prior to ovulation. PAI is secreted mainly by theca-interstitial cells and is stimulated also by the gonadotropins. The formation of complexes between PA and PAI completely blocks or decreases PA activity. It is suggested that the interaction between plasminogen activators and their inhibitor in the follicles may play a very important role in maintaining normal ovarian function and the machnism of ovulation.","PeriodicalId":223601,"journal":{"name":"Science in China Series B-Chemistry, Biological, Agricultural, Medical & Earth Sciences","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122559112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 13
中国汉族、维吾尔族、哈萨克族和回族群体线粒体DNA多态性的研究 中国汉族、维吾尔族、哈萨克族和回族群体线粒体DNA多态性的研究
Science in China Series B-Chemistry, Biological, Agricultural, Medical & Earth Sciences Pub Date : 1988-01-10 DOI: 10.1360/ZB1988-18-1-60
俞民澍, 邱信芳, 薛京伦, 刘祖洞, 谈家桢, 李厚均, 刘德祥, 李力, 余伍忠, 唐仙珍, 周美蓉
{"title":"中国汉族、维吾尔族、哈萨克族和回族群体线粒体DNA多态性的研究","authors":"俞民澍, 邱信芳, 薛京伦, 刘祖洞, 谈家桢, 李厚均, 刘德祥, 李力, 余伍忠, 唐仙珍, 周美蓉","doi":"10.1360/ZB1988-18-1-60","DOIUrl":"https://doi.org/10.1360/ZB1988-18-1-60","url":null,"abstract":"本文应用线粒体(mtDNA)作为研究工具,对我国汉族、维吾尔族、哈萨克族和回族群体的遗传结构进行了系统分析。通过对四个民族群体mtDNA限制性类型的调查,发现了一批新的类型,其中包括一些只存在于某一种族和民族中的突变类型,表明mtDNA限制酶切片段多态性类型的分布在不同民族和种族中有显著差别。在与灵长类动物比较后发现,现代世界上只有少数东方人种中保留着mtDNA的祖先类型,这为亚洲可能是人类的起源地之一提供了间接证据。我们根据限制性位点差计算出各民族间的遗传距离,绘制成系统树,表明维吾尔族和哈萨克族群体最先汇聚成一支,而汉族与回族汇聚成一支,最后两支再汇聚在一起。同时发现,维吾尔族和哈萨克族群体内部交异比汉族和回族大,从分子水平揭示了这四个民族群体问的相互关系。","PeriodicalId":223601,"journal":{"name":"Science in China Series B-Chemistry, Biological, Agricultural, Medical & Earth Sciences","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134048976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
修饰核苷酸的生物功能——II.酵母tRNA Ala 类似物(A 34 或G 34 代替I 34 )的合成及生物活性 修饰核苷酸的生物功能——II.酵母tRNA Ala 类似物(A 34 或G 34 代替I 34 )的合成及生物活性
Science in China Series B-Chemistry, Biological, Agricultural, Medical & Earth Sciences Pub Date : 1987-12-10 DOI: 10.1360/ZB1987-17-12-1272
裘慕绥, 金由辛, 李文琴, 包俊菇, 龚佩娟, 吴仁龙, 郑可沁, 王德宝
{"title":"修饰核苷酸的生物功能——II.酵母tRNA Ala 类似物(A 34 或G 34 代替I 34 )的合成及生物活性","authors":"裘慕绥, 金由辛, 李文琴, 包俊菇, 龚佩娟, 吴仁龙, 郑可沁, 王德宝","doi":"10.1360/ZB1987-17-12-1272","DOIUrl":"https://doi.org/10.1360/ZB1987-17-12-1272","url":null,"abstract":"酵母tRNA Ala 的5′-半分子类似物(A 34 或G 34 代替I 34 )与3′-半分子在T 4 RNA连接酶催化下连接成酵母tRNA Ala 类似物(A 34 或G 34 代替I 34 )的整分子。合成的酵母tRNA Ala 类似物,在凝胶电泳上具有与天然酵母tRNA Ala 相同长度位置,其纯度为95％左右,连接点、末端分析都是对的。测定了这类似物的生物活力,即在大鼠肝氨酰基tRNA合成酶的催化下,接受丙氨酸的能力与天然重组的酵母tRNA Ala 没有明显变化,而在兔网织细胞裂解液体系中能将所携带的丙氨酸参入到蛋白质中去的能力,A 34 代替I 34 的只有天然或天然重组酵母tRNA Ala 的1/3,而G 34 代替I 34 的为90％左右。着重讨论了A或G代替I 34 后,参入活力变化不同的原因。","PeriodicalId":223601,"journal":{"name":"Science in China Series B-Chemistry, Biological, Agricultural, Medical & Earth Sciences","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122251090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
钼铁混合金属原子簇的研究——I. ( η 5 -C 5 H 5 ) 2 Mo 2 Fe 2 (μ 4 -Te)(μ 3 -Te) 2 (CO) 6 的合成和结构表征 钼铁混合金属原子簇的研究——I. ( η 5 -C 5 H 5 ) 2 Mo 2 Fe 2 (μ 4 -Te)(μ 3 -Te) 2 (CO) 6 的合成和结构表征
Science in China Series B-Chemistry, Biological, Agricultural, Medical & Earth Sciences Pub Date : 1987-12-10 DOI: 10.1360/ZB1987-17-12-1266
杨小广, 黄锦顺, 黄金陵
{"title":"钼铁混合金属原子簇的研究——I. ( η 5 -C 5 H 5 ) 2 Mo 2 Fe 2 (μ 4 -Te)(μ 3 -Te) 2 (CO) 6 的合成和结构表征","authors":"杨小广, 黄锦顺, 黄金陵","doi":"10.1360/ZB1987-17-12-1266","DOIUrl":"https://doi.org/10.1360/ZB1987-17-12-1266","url":null,"abstract":"本文用Fe 3 (μ 3 -Te) 2 (CO) 9 同Mo 2 (CO) 6 ( η 5 -C 5 H 5 ) 2 反应合成出标题化合物。结晶学参数如下:空间群Imm2,620个I≥2σ(I)的独立衍射参加最小二乘法修正结构,最终 R 因子值为0.022。X射线分析表明Mo 2 Fe 2 形成一蝴蝶型结构,其中两钼原子占据两蝴蝶翼的交界处,Mo—Mo=2.819。两个铁则处于蝴蝶翼的顶端,Mo—Fe=2.932(2)。每个钼原子与一个环成二烯基键联,三个羰基配体以端基的形式与每个铁原子键联。一碲原子处在蝴蝶型开口的上方键联四个金属原子,Mo—Te(μ 4 )=2.625(2),Fe—Te(μ 4 )=2.713(2)。两个μ 3 -碲原子处在μ 4 -Te原子的对面,分别处在二个FeMo 2 三角面上,Mo—Te(μ 3 )=2.678(1),Fe—Te(μ 3 )=2.513(3)。整个分子具有严格的 C 2 v 对称性,整个簇骼结构可看成双帽三角双锥构型。","PeriodicalId":223601,"journal":{"name":"Science in China Series B-Chemistry, Biological, Agricultural, Medical & Earth Sciences","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125913968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
美登素全合成的研究——IV.美登素的合成 美登素全合成的研究——IV.美登素的合成
Science in China Series B-Chemistry, Biological, Agricultural, Medical & Earth Sciences Pub Date : 1987-12-10 DOI: 10.1360/ZB1987-17-12-1301
顾学钦, 潘百川, 周启霆, 白东鲁, 高怡生
{"title":"美登素全合成的研究——IV.美登素的合成","authors":"顾学钦, 潘百川, 周启霆, 白东鲁, 高怡生","doi":"10.1360/ZB1987-17-12-1301","DOIUrl":"https://doi.org/10.1360/ZB1987-17-12-1301","url":null,"abstract":"本文报道光学纯美登醇、美登素的合成。合成的美登醇、美登素的各项物理常数和光谱数据包括薄层层析行为、熔点、比旋度、高速液相、紫外光谱、圆二色散谱、红外光谱、核磁共振和质谱等与天然美登醇、美登素的完全一致。生物试验表明合成的美登素与天然的美登素具有相同的抗肿瘤活性。","PeriodicalId":223601,"journal":{"name":"Science in China Series B-Chemistry, Biological, Agricultural, Medical & Earth Sciences","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124857621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
美登素全合成的研究——III.C 5 —N片段的合成 美登素全合成的研究——III.C 5 —N片段的合成
Science in China Series B-Chemistry, Biological, Agricultural, Medical & Earth Sciences Pub Date : 1987-12-10 DOI: 10.1360/ZB1987-17-12-1294
顾学钦, 潘百川, 周启霆, 白东鲁, 高怡生学钦
{"title":"美登素全合成的研究——III.C 5 —N片段的合成","authors":"顾学钦, 潘百川, 周启霆, 白东鲁, 高怡生学钦","doi":"10.1360/ZB1987-17-12-1294","DOIUrl":"https://doi.org/10.1360/ZB1987-17-12-1294","url":null,"abstract":"","PeriodicalId":223601,"journal":{"name":"Science in China Series B-Chemistry, Biological, Agricultural, Medical & Earth Sciences","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131931643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
簇合物反应性能的研究Cu(+2)夺取钼簇合物配基的反应及产物Cu 8 Cl 2 [S 2 P(OEt) 2 ] 6 的晶体结构 簇合物反应性能的研究Cu(+2)夺取钼簇合物配基的反应及产物Cu 8 Cl 2 [S 2 P(OEt) 2 ] 6 的晶体结构
Science in China Series B-Chemistry, Biological, Agricultural, Medical & Earth Sciences Pub Date : 1987-11-10 DOI: 10.1360/ZB1987-17-11-1151
吴鼎铭, 黄建全, 林玉辉, 黄金陵
{"title":"簇合物反应性能的研究Cu(+2)夺取钼簇合物配基的反应及产物Cu 8 Cl 2 [S 2 P(OEt) 2 ] 6 的晶体结构","authors":"吴鼎铭, 黄建全, 林玉辉, 黄金陵","doi":"10.1360/ZB1987-17-11-1151","DOIUrl":"https://doi.org/10.1360/ZB1987-17-11-1151","url":null,"abstract":"钼簇合物Mo 3 (μ 3 —S)(μ—S) 2 [μ—SOP(OEt) 2 ][S 2 P(OEt) 2 ] 3 (O) 2 和CuCl 2 ·2H 2 O进行氧化还原反应,其产物组成为Cu 8 Cl 2 [S 2 P(OEt) 2 ] 6 。该晶体属三斜晶系,空间群为P(?)。晶胞参数 a =11.578(5), b =12.663(3), c =14.317(4); α =55.54(2), β =57.35(3), r =72.23(3)(°); Z =1; D calc .=1.926g·cm -3 。对3573个 Ⅰ ≥3 σ (Ⅰ)的独立衍射的偏离因子 R =0.075。研究表明,晶体是由以Cu 8 Cl 2 [S 2 P(OEt) 2 ] 6 为结构单元的链式分子所构成。其中,8个Cu原子组成一个立方体笼腔,每个Cu(+1)配位氛围为四配位四面体构型,Cu—Cu间距为3.018—3.437,未形成金属一金属键。这种Cu(+2)夺取Mo簇合物配基的现象,值得进一步研究。","PeriodicalId":223601,"journal":{"name":"Science in China Series B-Chemistry, Biological, Agricultural, Medical & Earth Sciences","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130221155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mg 2+ 通过磷脂影响脂酶体中H~+-ATP酶的慢运动 Mg 2+ 通过磷脂影响脂酶体中H~+-ATP酶的慢运动
Science in China Series B-Chemistry, Biological, Agricultural, Medical & Earth Sciences Pub Date : 1987-11-10 DOI: 10.1360/ZB1987-17-11-1166
王金凤, 卢景雰, 张斌贤, 杨福愉
{"title":"Mg 2+ 通过磷脂影响脂酶体中H~+-ATP酶的慢运动","authors":"王金凤, 卢景雰, 张斌贤, 杨福愉","doi":"10.1360/ZB1987-17-11-1166","DOIUrl":"https://doi.org/10.1360/ZB1987-17-11-1166","url":null,"abstract":"本文研究Mg 2+ 对H + -ATP酶在脂酶体中慢运动的影响。在不同Mg 2+ 浓度及不同温度下,测量了运用保温法嵌入脂酶体中的马来酰亚胺自旋标记的H + -ATP酶的ST-EPR谱。由ST-EPR谱的诊断参数 L″/L,C′/C 与Mg 2+ 浓度以及温度的关系,并对照根据相同条件下测得的5NS-EPR谱超精细分裂而得到的序参数S与Mg 2+ 浓度以及温度的关系,分析得出:增加脂酶体中的Mg 2+ 浓度与降低测量温度都导致H + -ATP酶在膜脂中的运动相关时间增加。进一步分析还得到H + -ATP酶在膜脂中旋转扩散运动的快慢与周围膜脂的活化能大小有关。在脂酶体中Mg 2+ 浓度的变化将导致膜脂活化能发生改变,从而影响H + -ATP酶在膜中的慢运动状态。","PeriodicalId":223601,"journal":{"name":"Science in China Series B-Chemistry, Biological, Agricultural, Medical & Earth Sciences","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117279610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
药物离子选择性电极响应规律的系统研究——II.使用季鏻与季鉮化合物的磺胺类药物离子选择性电极 药物离子选择性电极响应规律的系统研究——II.使用季鏻与季鉮化合物的磺胺类药物离子选择性电极
Science in China Series B-Chemistry, Biological, Agricultural, Medical & Earth Sciences Pub Date : 1987-11-10 DOI: 10.1360/ZB1987-17-11-1203
姚守拙, 肖俊, 聂利华
{"title":"药物离子选择性电极响应规律的系统研究——II.使用季鏻与季鉮化合物的磺胺类药物离子选择性电极","authors":"姚守拙, 肖俊, 聂利华","doi":"10.1360/ZB1987-17-11-1203","DOIUrl":"https://doi.org/10.1360/ZB1987-17-11-1203","url":null,"abstract":"本文合成了多种磺胺的季鏻及季鉮盐型离子缔合物,以此为电活性物,系统地研究了电极性能。发现:电极性能主要决定于定域体阳离子,阴离子部分无显著影响,电极性能次序为十六烷基三辛铵>十六烷基三苯锛>十六烷基三苯钟。电极对不同磺胺的选择性次序为ST>SMZ>SDM,SDM′>SA>SD>SN;选择性系数不单与分子连接性指数X有关,且与N 1 原子电荷密度 σ 及 pKa 有关,符合关系式:log K ij = ax + bσ - cpKa - d 。在文献中首次提出可用磺胺类药物离子选择性电极测定磺胺类药物。","PeriodicalId":223601,"journal":{"name":"Science in China Series B-Chemistry, Biological, Agricultural, Medical & Earth Sciences","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122184909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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