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原卵黄目(Prolecithophora)柱口科(Cylindrostomidae)肠口涡虫属(Enterostomula)为海栖涡虫,全球记录3种,在中国未见报道。作者在广东省深圳市深圳湾海边(22°31'N,113°56'E)采集到一种海栖涡虫。本文对该种涡虫进行了较为详细的比较研究,鉴定为柱口科肠口涡虫属格氏肠口涡虫(E.graffi de Beauchamp,1913),为中国新纪录科新纪录属一新纪录种。该种涡虫多数个体背部具2条黑色横纹,部分个体背部花纹有明显变化。眼点2对。雌雄同体,精巢、卵巢各1个。受精囊位于卵巢与子宫之间;子宫位于体末端,后接一微小的外阴道。本文发现:①该涡虫的尾部腹面具有一个交配囊及一根雌性生殖管,交配囊是一个由肌肉层组成的袋状囊,同时与子宫、雌性生殖管相连;②雌性生殖管外围有明显的生殖腺包裹;③雌性生殖管孔、阴茎孔与口孔一起通往体外;④此种涡虫喜分泌黏液将微小杂质粘结呈半球状窝,虫体隐藏于窝内。 相似文献
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中国涡虫一新纪录科(扁形动物门,单肠目,盲扁虫科)背睾涡虫属一新种 总被引:1,自引:0,他引:1
记述了中国涡虫单肠目1新纪录科背睾涡虫属1新种,即中国背睾涡虫Phaenocor asinensis sp.nov.。新种的主要鉴别特征是:外轮廓呈长子弹形,后缘呈刀切状;精巢长度占体长的2/3,位于卵黄腺的背部。阴茎表面小刺呈犬牙状,其内折部中段具4个矩形的粗刺。子宫有2个开口,一端连接卵巢,另一端连接生殖腔。卵黄腺呈条形,具短分支,左右卵黄腺无衔接。生活于淡水。标本保存在深圳大学生命科学学院形态学研究室。 相似文献
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本研究报道单肠目Rhabdocoela斯库台科Scutariellidae斯库台涡虫属Scutariella新种:中国斯库台涡虫,新种Scutariella sinensis sp.nov.,对其进行了形态学、分子系统学等研究。新种的主要鉴别特征:(1)二支卵黄腺在背部两侧沿肠管分布,在近肠后部愈合,整体呈"U"型;(2)生殖孔位于肠前端腹侧;(3)咽腺丰富,位于咽肠交界处的两侧;(4)精巢、卵巢位于肠道前1/3腹侧。新种的18S rDNA和28S rDNA分子系统发生研究首次提供了切头类斯库台科的分子数据,确定切头亚目Temnocephalida的分类地位及该亚目与吸虫类的进化关系。 相似文献
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澳洲异尾涡虫(无肠目,盘旋科)新纪录及描述 总被引:1,自引:0,他引:1
本文对分布于广东省深圳市深圳湾体育中心海边(22°30'58″N,113°56'1″E)的一种褐绿色涡虫的形态、发育、行为等做了详细观测,并对其进行了分类学与动物地理方面的讨论。结果表明,此涡虫表皮内具共生的虫黄藻(Zooxanthella microadriatica),另具菌丝状分布的棕色颗粒。头部钝圆,具1对米粒状棕色眼点和1个平衡囊。尾后两侧具2条并列的尾垂,其形状和大小与涡虫尾部的舒展状态相关。雌雄同体,生殖孔2个,位于口后,雌孔在前,雄孔在后。卵巢、精巢成双,分别位于腹侧与背侧。受精囊呈哑铃型,囊内具2~12根囊管。阴道呈倒"T"形,其表皮由柱状细胞构成。精巢内精子集聚成束,向体后两侧延伸成假储精囊,汇入储精囊。储精囊环抱阴茎球。涡虫利用纤毛的摆动在水底滑动,或利用两侧身体的摆动呈蝶状游泳。喜捕食微型涡虫与轮虫,人工饲养可摄食水蚤或水溞。经比较,鉴定为无肠目盘旋科(Convolutidae)异尾属(Heterochaerus)澳洲异尾涡虫(H.australis Haswell,1905),属中国涡虫1新纪录目1新纪录种。 相似文献
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《四川动物》2016,(1)
本文记述淡水涡虫类单肠目Rhabdocoela达氏科Dalyelliidae小达氏涡虫属Microdalyellia一新种,广东小达氏涡虫Microdelyellia guangdongensis Wang et Rong,sp.nov.,模式标本由卢彦宏于2013年6月9日采自广东省深圳市石岩水库(22°40'58″N,113°53'42″E);杰氏涡虫属Gieysztoria一新种,七星岩杰氏涡虫Gieysztoria qixingyanensis Wang et Rong,sp.nov.,模式标本由刘旭坤于2014年8月6日采自广东省肇庆市七星岩风景区(23°04'32″N,112°28'46″E)。对2个涡虫新种的形态特征作了详细描述,并分别与小达氏涡虫属和杰氏涡虫属近似物种进行了比较。所有标本保存于中国科学院国家动物博物馆。 相似文献
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中国涡虫一新纪录科达氏涡虫属一新种(单肠目,达氏科) 总被引:8,自引:7,他引:1
记述了中国涡虫纲单肠目1新纪录科达氏科达氏涡虫属1新种,即中国达氏涡虫Dalyellia sinensis sp.nov..新种的主要鉴别特征是:表皮下有许多单细胞绿藻Chlorella sp.,体表呈绿色;体长2 200 μm,体中部宽475μm,几丁质阴茎长178 μm,柄2根,柄长100μm,柄宽13~15 μm,两柄间距188 μm,分支2条,呈心形排列,阴茎上有几丁质刺22根,分支末端的刺长是基部刺长的1/5.标本保存在深圳大学生命科学学院形态学研究室. 相似文献
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杰氏涡虫属一新种及中国一新纪录种(扁形动物门,单肠目,达氏科) 总被引:3,自引:2,他引:1
报道中国杰氏涡虫属1新种:丽杰氏涡虫Gieysztoria pulchra sp.nov.,标本采于广东省梅州市郊区鱼塘,对新种涡虫的形态特征作了详细描述,并与杰氏涡虫属所有物种进行了比较;中国1新纪录亚种:大变杰氏涡虫九刺亚种Gieysztoria macrovariata 9-spinosa Luther,1955,标本分别采自安徽芜湖市和湖北省武汉市东湖.所有标本保存在深圳大学生命科学学院形态学研究室. 相似文献
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小达氏涡虫属一新种(扁形动物门,单肠目,达氏科) 总被引:1,自引:1,他引:1
报道中国小达氏涡虫属1新种:湖南小达氏涡虫Microdalyellia humanensis nov.sp.,模式标本采集于湖南新宁县莨山镇黄背村(26°44′N,110°84′E),对新种涡虫的形态特征作了详细描述,所有标本保存在深圳大学生命科学学院. 相似文献
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BACKGROUND:
Hemophilia A (HA), being an X-linked recessive disorder, females are rarely affected, although they can be carriers.AIMS:
To study the mutation in F8 gene in an extended family with a homozygous female HA.MATERIALS AND METHODS:
All the seven affected members (six males and one female) were initially screened by Conformation Sensitive Gel Electrophoresis (CSGE) and direct DNA sequencing.RESULTS:
A homozygous missense mutation c.1315G>A (p.Gly420Ser) was identified in exon 9 of F8 gene in homozygous state in the affected female born of 1° consanguinous marriage and in all the affected male members of the family. Her factor VIII levels was found to be 5.5%, vWF:Ag 120%.CONCLUSION:
In India, as consanguineous marriages are very common in certain communities (up to 30%), the likelihood of encountering female hemophilia is higher, although this is the first case of HA out of 1600 hemophilia families registered in our Comprehensive Haemophilia Care Center. Genetic diagnosis in such cases is not necessary as all the male children will be affected and daughters obligatory carriers. 相似文献13.
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P. Kugler 《Histochemistry and cell biology》1982,74(2):229-245
Summary Quantitative histochemical measurements of aminopeptidase A (APA; E.C.3.4.11.7) were done kinetically in the kidney glomeruli of rat and mouse with an instrumental setup consisting of a microdensitometer and a computer-supported morphometric system. The histochemical demonstration of APA was carried out using the simultaneous azo coupling technique (purest-grade Fast Blue B as coupling agent and -l-glutamic acid-4-methoxy-2-naphthylamide as substrate). The methodological studies show that APA activity is calcium-ion-dependent and increases linearly with the thickness of the tissue section (3–12 m) and that the time-course of APA activity as determined by linear regression is linear only for the first 1 to 2 min of the reaction. — Kinetic measurements indicate a 40% decrease in APA activities when -l-glutamic acid-4-methoxy-2-naphthylamide (-l-Glu-MNA) is replaced by -l-aspartic acid-4-methoxy-2-naphthylamide. When -l-Glu-MNA is replaced with l-alanine-4-methoxy-2-naphthylamide, which is a substrate of aminopeptidase M (APM) only very low reaction rates are measurable (about 1.4% of those with -l-Glu-MNA). 100 and 130 mM NaCl in the incubation medium increase APA activities by approximately 16%–17%. — To clarify the functional importance of APA in the kidney, their activities were measured under the influence of angiotensins. The glomerulus was selected as the measuring site, for besides APA it contains no APM or other peptidases that could degrade angiotensins (the glomerular dipeptidyl peptidase IV is not inhibited by angiotensin II). Using the Lineweaver-Burk plot, we determined a K
m of 0.16 mM for the APA in rat glomeruli and 0.14 mM in mouse glomeruli. The V
max in mouse glomeruli is 1.6 times higher than in rat glomeruli. Ang iotensin I, II and III competitively inhibit APA in the rat and mouse glomeruli. — With quantitative histochemical techniques it was possible to show that APA is equivalent to angiotensinase A (splitting off the N-terminal aspartic acid from angiotensin I and II).Supported by the Deutsche Forschungsgemeinschaft (SFB 105) 相似文献
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N.A.Abdel Salam Zeinab F. Mahmoud Jürgen Ziesche Ferdinand Bohlmann 《Phytochemistry》1982,21(11):2746-2747
The aerial parts of Urospermum picroides afforded, in addition to urospermal A a p-hydroxylphenyl acetate of a glucoside of urospermal A. 相似文献
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Replacement of two to four guanines by adenines in the human telomere DNA repeat dG3(TTAG3)3 did not hinder the formation of quadruplexes if the substitutions took place in the terminal tetrad bridged by the diagonal loop of the intramolecular antiparallel three‐tetrad scaffold, as proved by CD and PAGE in both Na+ and K+ solutions. Thermodynamic data showed that, in Na+ solution, the dG3(TTAG3)3 quadruplex was destabilized, the least by the two G:A:G:A tetrads, the most by the G:G:A:A tetrad in which the adenosines replaced syn‐guanosines. In physiological K+ solution, the highest destabilization was caused by the 4A tetrad. In K+, only the unmodified dG3(TTAG3)3 quadruplex rearranged into a K+‐dependent quadruplex form, none of the multiple adenine‐modified structures did so. This may imply biological consequences for nonrepaired A‐for‐G mutations. © 2010 Wiley Periodicals, Inc. Biopolymers 93: 880–886, 2010. 相似文献
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A monoclonal antibody to ochratoxin A 总被引:1,自引:1,他引:0
The production of patulin by P. expansum Link ex Gray growing in apple juice was determined over a range of pH. Patulin was found to be produced in large quantities over a narrow range of pH from 3-2 to 3–8. The biomass produced increased with increasing pH. The changes in pH due to growth of the organism were found to be small. 相似文献