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本文旨在研究福建闽南地区汉族和畲族指长比(R)的特点。随机选择福建闽南地区汉族506例(男性173例,女性333例),畲族450例(男性231例,女性219例),采用体质测量法,测量并计算左右侧6项指长比(R2/3、R2/4、R2/5、R3/4、R3/5、R4/5)。福建闽南地区汉族和畲族左、右侧指长比均呈R2/3<R2/4<R3/4<R2/5<R4/5<R3/5的趋势;汉族女性指长比左侧R2/3、R2/4、R2/5、R3/4、R3/5和右侧R2/3、R2/4、R2/5高于汉族男性(P<0.05);畲族女性指长比左侧的R2/3、R2/4、R2/5和右侧R2/3、R2/4高于畲族男性(P<0.05);畲族男性指长比左、右侧R2/3、R2/4、R2/5、R3/5、R4/5高于汉族男性(P<0.05);畲族女性指长比左侧R2/3、R2/4和右侧R2/3、R2/4、R2/5、R4/5高于汉族女性(P<0.05)。同民族不同性别两侧R2/4百分比分布差异有统计学意义,不同民族同性别右侧R2/4百分比分布差异有统计学意义。福建闽南地区汉族和畲族指长比存在性别、侧别的不同,与其他地区、族群也存在差异。 相似文献
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C.E. DEANE-DRUMMOND 《Plant, cell & environment》1985,8(2):105-110
Abstract. Net NO3 uptake by NO− 3 deficient Chara cells was used to calculate [NO− 3 ]c assuming that the cytoplasm occupies 10% total volume and that nitrate reduction and storage are negligible (i.e. maximum [NO− 3 ]c was calculated). A linear relationship was found between NO− 3 efflux and [NO− 3 ]c . There was an initial burst of NO− 3 efflux when NH+ 4 was added, followed by a slower efflux rate which matched influx rate such that net NO− 3 uptake was zero. Over 50% of NO− 3 that had been taken up in 2 h was lost within the first 5 min of NH+ 4 addition. The Nernst equation was used to predict the direction of the electrochemical driving force for NO− 3 entry. Under the experimental conditions used NO− 3 efflux is actively transported. The differential involvement of both NO− 3 influx and NO− 3 efflux in the regulation of NO− 3 uptake is discussed and a model is proposed to account for these results which envisages discrete NO− 3 influx and NO− 3 efflux carriers. 相似文献
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1,10-Phenanthroline-5,6-dione (C12H6N2O2 (1)) reacts with V(η6-mesitylene)2 and Ti(η6-toluene)2 affording coordination compounds of general formula M(O,O′---C12H6N2O2)3 (M=Ti (2); M=V (3)) which further react with TiCl4 or TiCp2(CO)2 yielding the tetrametallic species M(O,O′---C12H6N2O2---N,N′)3(M′Ln)3 (M=V, M′Ln=TiCl4 (4); M=Ti, M′Ln=TiCp2 (5); M=V, M′Ln=TiCp2 (6)). The complex salt [Fe(N,N′---C12H6N2O2)3][PF6]2 (7) has been obtained from iron(II) chloride tetrahydrate and 1 in the presence of NH4PF6. The reaction of 7 with TiCp2(CO)2 affords the tetrametallic derivative [Fe(N,N′---C12H6N2O2---O,O′)3(TiCp2)3][PF6]2 (8). TiCl2(THF)2 reacts with MCp2(O,O′---C12H6N2O2) to give MCp2(O,O′---C12H6N2O2---N,N′)TiCl2 (M=Ti (9); M=V (10)). By reaction of TiCp2(O,O′---C12H6N2O2---N,N′)TiCl2 (9) with C12H6N2O2, the bimetallic derivative TiCp2(O,O′---C12H6N2O2---N,N′)TiCl2(O,O′---C12H6N2O2) (11) has been prepared, which readily adds to TiCl4, to give the trimetallic titanium derivative TiCp2(O,O′---C12H6N2O2---N,N′)TiCl2(O,O′---C12H6N2O2---N,N′)TiCl4 (12). VCp2(O,O′---C12H6N2O2---N,N′)TiCl2 (10) reacts with the tris-chelate iron(II) cation 7 affording the heptametallic cationic complex [Fe(N,N′---C12H6N2O2---O,O′)TiCl2(N,N′---C12H6N2O2---O,O′)VCp2]3 +2 isolated as the hexafluorophosphate 13. 相似文献
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Olavi Junttila Einar Jensen David W. Pearce Richard P. Pharis 《Physiologia plantarum》1992,84(1):113-120
Cessation of shoot elongation in seedlings of Salix pentandra L. is induced by short photoperiod. Gibbereliin A9 (GA9 ) applied either to the apical bud or injected into a mature leaf, induced shoot elongation under a short photoperiod of 12 h, and GA9 could completely substitute for a transfer to a long photoperiod. When [3 H]GA9 or [2 H2 ]GA9 was injected into a leaf, no [3 H]GA9 was detected in the elongating apex and only traces of [3 H]GA9 were found in the shoot above the treated leaf. By the use of gas chromatography-mass spectrometry (GC-MS), [2 H2 ]GA20 was identified as the main metabolite of [2 H2 ]GA9 in both the shoot and the treated leaf. In addition, [2 H2 ]GA1 and [2 H2 ]GA29 were also identified as metabolites of [2 H2 ]GA9 . These results are consistent with the hypothesis that exogenous GA, promotes shoot elongation in Salix through its metabolism to GA20 and GA,. 相似文献
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异担子菌属Heterobasidion种类是北半球针叶树最严重的森林病原菌,在世界范围内能侵染27种针叶树,对欧洲和北美洲的经营林已造成重大损失。基于传统形态学研究,认为异担子菌属有2个种,即多年异担子菌H. annosum和岛生异担子菌H. insulare,然而单孢交配实验研究证明2个种为复合种。分子系统发育分析研究表明:异担子菌属包括15个种,其中5个种为森林病原菌[冷杉异担子菌H. abietinum、多年异担子菌(狭义)H. annosum s. str.、变孔异担子菌H. irregulare、西方异担子菌H. occidentale和小孔异担子菌H. parviporum];10个种为腐生菌(淀粉孢异担子菌H. amyloideum、南洋杉异担子菌H. araucariae、阿曼德异担子菌H. armandii、南方异担子菌H. australe、岛生异担子菌H. insulare、林芝异担子菌H. linzhiense、东方异担子菌H. orientale、拟岛生异担子菌H. subinsulare、拟小孔异担子菌H. subparviporum和西藏异担子菌H. tibeticum)。多年异担子菌(狭义)H. annosum s. str.、小孔异担子菌H. parviporum和冷杉异担子菌H. abietinum分布于欧洲,分别是松属、云杉属和冷杉属林木的病原菌。变孔异担子菌H. irregulare和西方异担子菌H. occidentale分布于北美洲,前者侵染松属和柏属树木,后者侵染冷杉属、铁杉属、黄杉属和巨杉属树木。虽然广义的多年异担子菌H. annosum sensu lato曾在我国报道,但基于目前研究结果表明该种为拟小孔异担子菌H. subparviporum。目前世界上最具侵染力的5种病原菌即狭义的多年异担子菌H. annosum s. str.、小孔异担子菌H. parviporum、冷杉异担子菌H. abietinum、变孔异担子菌H. irregulare和西方异担子菌H. occidentale还未在我国发现,也未列为对外检疫对象,因此建议将其列为进境植物检疫性有害生物。RNA聚合酶II大亚基序列(RPB1)在异担子菌属种类鉴定中敏感性和特异性最高,研究证明该分子方法可应用于鉴别不同异担子菌种类的有效基因标记,在海关部门进行原木和木质产品的检疫中可运用该分子标记进行林木病原异担子菌的检测。 相似文献
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Addition of small amounts of Fe2 + , Zn2 + , Cu2 + and thiamine-HCl to the culture medium was required for promoting the galacto-oligosaccharide (Gal-OS)-producing activity of Sterigmatomyces elviae CBS8119, when the concentration of yeast extract in the medium was lowered to 0·1 g l−1 . Galacto-oligosaccharide production using a recycling cell culture was performed in a medium containing 360 mg ml−1 of lactose supplemented with optimal concentrations of Fe2 + (1·5 mg l−1 of FeSO4 .7H2 O), Zn2 + (15 mg l−1 of ZnSO4 .7H2 O), Cu2 + (0·5 mg l−1 of CuSO4 .5H2 O) and thiamine-HCl (1 mg l−1 ) . Galacto-oligosaccharide production was maintained at high levels during six cycles of production, with the amount of Gal-OS produced in each cycle being more than 216 mg ml−1 (weight yield of more than 60%). 相似文献
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Frank J. Femia Xiaoyuan Chen Kevin P. Maresca John W. Babich Jon Zubieta 《Inorganica chimica acta》2000,310(2):210-216
The reaction of perrhenate with 2-hydrazinopyrimidine in MeOH–HCl yields [ReCl3(η1-NNC4H3N2H)(η2-HNNC4H3N2)] (1). The analogous reaction with Na2MoO4 yields [MoCl3(η1-NNC4H3N2H)(η2-HNNHC4H3N2)] (1a). The reaction of 1 with pyrimidine-2-thiol and triethylamine produces [Re(η1-C4H3N2S)(η2-C4H3N2S)(η1-NNC4H3N2)(η2-HNNC4H3N2)] (2), while reaction of 1 with the Schiff base HSC6H4N=C(H)C6H4OH provides [Re(η3-SC6H4N=C(H)C6H4O)(η1-NNC4H3N2)(η2-HNNC4H3N2)]·0.6CH2Cl2 (3·0.6CH2Cl2). The analogous hydrazinopyridine complex of the Schiff base, [Re(η3-SC6H4N=C(H)C6H4O)(η1-NNC5H4N)(η2-HNNC5H4N)] (4), was also synthesized by reacting [ReCl3(η1-NNC5H4NH)(η2-HNNC5H4N)] with HSC6H4N=C(H)C6H4OH. The crystal structures of 1–4 have been determined. 相似文献
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目的 甲型H1N1流感病毒A/California/7/2009分别与A/Brisbane/10/07和A/ShenZhen/406H/06共感染小型香猪,预测甲流病毒在与季流H3N2病毒/甲流病毒与禽流感病毒共感染时是否会发生变异.方法 分别将A/California/7/2009(CA7)与A/Brisbane/10/07(H3N2),A/California/7/2009与A/Shenzhen/406H/06(H5N1)对5~6月龄小型猪共感染,小型猪经复方氯胺酮0.1 mL/kg麻醉后进行滴鼻感染,感染后第5天安乐死动物,取动物肺组织作病毒测序分析.结果 A/California/7/2009(CA7)与A/Brisbane/10/07(H3N2)共感染后,A/California/7/2009病毒PB1基因993位G→A突变,PA基因1659位G→A突变,没有氨基酸的变异.A/California/7/2009与A/Shenzhen/406H/06(H5N1)共感染后A/California/7/2009病毒PB2基因1711位T→C突变.碱基的突变未引起氨基酸的变异.结论 A/California/7/2009(CA7)与A/Brisbane/10/07(H3N2),A/California/7/2009与A/Shenzhen/406H/06(H5N1)共感染后在猪的体内没有发生病毒重组、变异. 相似文献
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Abstract The utilization of NO− 3 , NO− 2 and NH+ 4 was studied in whole filaments and isolated heterocysts of Anabaena 7120 (ATCC27893). NO− 3 - and NO− 2 -uptake were detectable in whole filaments but not in heterocysts, whereas NH+ 4 -uptake was detectable in both. Activity of NO− 3 -reductase was present in cell-free extracts of whole filaments but not of heterocysts, whereas activities of NO− 2 -reductase and glutamine synthetase were present in both. NO− 3 -uptake and reductase activities could not be induced in heterocysts even after prolonged incubation in NO− 3 medium. It is suggested that NO− 3 -metabolism in heterocysts is impaired due to a selective and irreversible loss of NO− 3 -uptake and reductase systems resulting in the abolition of competition for molybdenum cofactor (Mo-Co) and reductant between nitrogenase and NO− 3 -reductase, and an increase in glucose 6-phosphate dehydrogenase and 6-phosphogluconate dehydrogenase levels. 相似文献