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一、前言 灵猫香是灵猫的分泌物,主要有大灵猫香、小灵猫香。大灵猫的分布区较窄,小灵猫分布广。小灵猫香不仅可作为化学工业上传统的定香剂,而且在医药上也正进行取代麝香的研究。关于灵猫香的疗效,我国民间也有各种传说,在《本草纲目》中早已有记载;1972 相似文献
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中国灵猫科的支序系统学分析 总被引:3,自引:0,他引:3
选取分布于中国境内的8属9种灵猫科动物的88个骨骼性状、31个外部形态性状和1个行为性状,运用替代外群法分别以赤狐(犬科狐属)和青鼬(鼬科貂属)共同或单独作为外群进行支序分析,得出10个支序图,其步长(TL)为:106~136,一致性指数(CI)为0.581—0.660,保留指数(RI)为0.610—0.714。经合意分析得到4个相似的支序图,其TL为41—136,CI为0.581—0.732,RI为0.610—0.818,结果支持:①斑灵狸、大灵猫、小灵猫构成一个单系群,与传统分类一致(均属灵猫亚科);②椰子狸、花面狸、熊狸构成一个单系群,与传统分类一致(均属长尾狸亚科);③红颊獴、食蟹獴与灵猫科其他种为姐妹群关系(Bootstrap检验支持率100%),建议獴类为一亚科;④长颌带狸拥有较多自近裔性状如三个门齿孔,是一个高度特化的种类,其系统地位有待进一步研究。 相似文献
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运用扫描电镜技术对4种犬科动物针毛的结构进行观察,发现4种犬科动物在针毛鳞片结构上具有明显区别,提示利用毛鳞片的类型和排列规律作犬科动物种类鉴别是一种可行的方法.此法在法医物证检验方面的应用需要建立野生动物毛样数据库及先进的图像处理系统来完善. 相似文献
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小灵猫的食性分析与饲养 总被引:1,自引:0,他引:1
一、问题的提出 小灵猫是产在长江以南的一种野生毛皮动物,它的尾毛可以制毛笔,故有笔猫之称;它还能分泌一种灵猫香,又称之为香狸猫或香狸。灵猫香是香料工业上的重要定香剂;在医疗药效方面,有类似麝香作用。《本草纲目》中早有记载。近年来,随着我国医药事业的发 相似文献
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三种鼠针毛表面超微结构的比较研究 总被引:4,自引:0,他引:4
利用扫描电镜技术对棕背(鼠平)Clethrionomys rufocanus、大林姬鼠Apodemus sylvatics和花鼠Eutaraias sibiricus 3种森林害鼠针毛的表面结构进行观察.研究结果认为:3种鼠针毛在鳞片类型、游离缘平滑度、高度、密度等因素上存在一定的差异,其中棕背(鼠平)和大林姬鼠差异不显著,而花鼠与其它两种鼠差异显著,在鼠的分类上具有一定的参考意义. 相似文献
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The investigation of two East African and a Madagascarian Vernonia species afforded several new sesquiterpene lactones. Vernonia colorata subsp. grandis gave 19-hydroxyglaucolide A and three vernodalin derivatives, V. holstii five new cistifoliolides and V. zanzibarensis five lactones closely related to brachycalyxolide. The structures were elucidated by high field NMR techniques. The chemotaxonomic relevance is discussed briefly. 相似文献
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八种野豌豆属植物的核型研究 总被引:8,自引:0,他引:8
本文研究了八种野豌豆的核型,并首次报道了长尖野豌豆的染色体数目及其核型和新疆野豌豆的核型。同时提出了野豌豆属核型进化的两种趋势:原始基数的减少,从x=7→x=6→x=5;从多年生进化到一年生,核型的不对称性也随之增加。 相似文献
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描述了自甘肃南部发现的葡萄属一新种,文县蘡薁(Vitis wenxianensis W. T. Wang)。此新种与特产浙江的三出蘡薁[V. bryoniifolia Bunge var. ternata(W. T. Wang)C. L. Li]有很近的亲缘关系,二者可能是由蘡薁(V. bryoniifolia Bunge)衍生而出的一对姊妹群。基于上述认识,将三出蘡薁由变种提升至种的等级,但由于存在一个于1871年发表的种名(V. ternata Baker),因此,必须为三出蘡薁拟定一新名。 相似文献
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pH Dependences of steady-state kinetic parameters of cytochrome chains of submitochondrial particles have been studied. It has been shown that the lifetimes of activated states (τ) of the pairs of cytochromes b → c1 and a → a3 have different pH dependences; those for the c1 → c and c → a cytochrome pairs being similar. The rate constants for the non-activated state of the respiratory chains decreased for the b → c1 pair and increased for the a → a3 pair when the pH value was increased.The values of pK calculated from these dependences for the pairs b → c1 and a → a3 were 7.2 and 8.9, respectively. It has been supposed that the ratio of activated to non-activated electron carriers may be controlled by the local pH value in the mitochondrial membrane, the latter being dependent upon the rate of electron transfer. The kinetic model based on this assumption allows one to explain the experimental dependences on pH of the rate constants for cytochromes b → c, and a → a3.The values of the diffusion rate constants for H+ and OH? ions in the mitochondrial membrane estimated from these kinetic data obtained in this study weree 104–105 s?1 and 102–103 s?1, respectively. 相似文献
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Discovery of pheophytin function in the photosynthetic energy conversion as the primary electron acceptor of Photosystem II 总被引:2,自引:2,他引:0
Klimov VV 《Photosynthesis research》2003,76(1-3):247-253
This minireview describes the discovery of participation of pheophytin, a metal-free derivative of chlorophyll, in the early
steps of photosynthetic solar energy conversion as the primary electron acceptor of Photosystem II.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
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Bioluminescence is a biochemical process occurring in many organisms. Bacterial bioluminescence has been investigated extensively that lead to many applications of such knowledge. Quorum sensing in the bioluminescent bacteria is a chemical signal process to recognize the strength of its own population to start luminescence in harmony. There is a mechanism in these bacteria to also recognize inter‐species strength. When there is a higher number of these bacteria, the possibility and frequency of cell–cell physical contact will be high. In this study, the physical proximity was artificially enhanced between cells and the effect on luminescence in the concentrated cells in the normal culture medium and in the presence of other non‐bacterial cell‐free supernatants was investigated. The role of such physical contact in the quorum sensing in the bioluminescence is not known. Increase in the luminescence of V. fischeri when concentrated shows that the presence of physical proximity facilitates the quorum sensing for their bioluminescence. Copyright © 2009 John Wiley & Sons, Ltd. 相似文献
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本文对草菇、银丝草菇菌丝原生质体制备的最佳条件作了探讨。结果表明,培养两天的草菇菌丝,以0.5MKCI或0.5MMgSO_(4.7)H_2O作渗透压稳定剂,1.5%Lywallzyme(v/m),35℃下酶解1.5—2小时,原生质体产量可达1.5×10~6个/ml以上,培养3天的银丝草菇菌丝,以0.5MKCl作渗透压稳定剂,1.5%Lywallzyme,28℃酶解2—3小时,原生质体产量可达2.8×10~6个/ml以上。此研究对以后的原生质体融合育种打下了基础。 相似文献
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本文报道了国产北野豌豆Vicia ramuliflra(Maxim.)Ohwi和日本产V.fauviei Franch.和V.nipponica Matsum.的核型。北野豌豆古莲居群2n=12=2m(2SAT)+8sm+2st, 千山居群2n=12=6m+6sm。V.fauriei 2n=12=2m+8sm+2st, V.nipponica 2n=12=6m(4SAT)+4sm+2st, 核型分析表明核型主要由'm'、'sm'和'st'三种染色体组成, 核型对称性高(2A或3A)。染色体倍性分布格局, 形态特征和现代分布式样揭示黄山-西天目山-庐山-带山地可能是柳叶野豌豆复合种及其近缘种的起源中心和多样化中心, 四倍体的发生可能与第四纪山地冰川有关。 相似文献