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1.
灌木,高1—1.8m,茎、枝灰褐色:小枝淡褐色,具圆形小皮孔,嫩枝密被白色星状毛。叶纸质,椭圆形至长圆形,长2.2—10cm,宽1.2—3.4cm,有时两侧稍不对称,上面绿色,被细小星状毛,中脉微凸起,侧脉及细脉微凹,两面淡绿色,密被星状毛,叶脉明显凸起,先端渐尖至长渐尖.少为饨尖,基部近圆形或圆形,  相似文献   

2.
安徽泡果荠属(十字花科)一新种   总被引:3,自引:0,他引:3       下载免费PDF全文
黟县泡果荠 新种 图版1:A Hilliella yixianensis Y. H. Zhang, sp. nov. H. paradoxa (Hance) Y. H. Zhang et H. W. Li ab specie nova recedit foliolis ma-joribus, pedicellis brevioribus c. 2 mm longis sub fructu 2—3 mm longis, sepalis navicu-laribus majoribus c. 2 mm longis 1 mm latis, petalis longioribus (2. 8—3. 3 mm longis), sili-culis valvis irregularibus interdum praeditis.  相似文献   

3.
Hedychium menglianense Y. Y. Qian sp. nov. (Subgen. Euosmianthus)Species affinis H. sino-aureo Stapf, sed plantis ad arbores epiphyticis, laminis (2--)10--27 cm longis, (0.5 -) 1 .7-4 cm latis, petions 2-8 mm longis, ligulis papyraceis,l.5 -2 mm longis, spicis 10- 17-floribus, 5 -- 8 cm longis, bracteis calycis tubos noncircumnexis, apice emarginatis, calycis tubis bractea parum brevioribus, corollae lobislinearibus 11-13 mm longis, labellis ovatis, 8-9 mm longis, basi sessilibus, filamentis…  相似文献   

4.
钱义咏   《广西植物》1997,17(4):295-298
云南扁担杆属二新种@钱义咏¥云南省思茅行暑林业局扁担杆属;思茅扁担杆;景洪扁担杆云南扁担杆属二新种钱义咏(云南省思茅行暑林业局,思茅665000)TWONEWSPECIESOFGREWIAFROMYUNNANQianYiyong(ForestryBurea...  相似文献   

5.
孟连姜花新种图1 Hedychium menglianense Y. Y. Qian sp. nov. (Subgen. Euosmianthus) Species affinis H. sino-aureo Stapf, sed plantis ad arbores epiphyticis, laminis (2-)10-27 cm longis, (0.5-)1.7-4 cm latis, petiolis 2-8 mm longis, ligulis papyraceis,1.5-2 mm longis, spicis 10-17-floribus, 5-8 cm longis, bracteis calycis tubos non circumnexis, apice emarginatis, calycis tubis bractea parum brevioribus, corollae lobis linearibus 11-13 mm longis, labellis ovatis, 8-9 mm longis, basi sessilibus, filamentis7-7.5 mm longis, ventraliter pubescentibus, antheris 4.5-4.9 nm longis differt.  相似文献   

6.
云南扁担杆属植物计有14种3变种,本文对其中9种1变种作了分类学评注,并确认中国新记录2种,云南新记录1种,新组合1变种及新异名6个。  相似文献   

7.
孟连舞花姜 新种 图1Globba menglianensis Y. Y. Qian sp. nov. Fig. lG. heteroacrpa Y. Y. Qian, ined.Species affinis G. racemosae Smith, sed foliorum laminis lanceolatis, 9-30 cm longis,1-6 cm latis, utrinque pubescentibus, paniculis 25 - 50 cm longis, calycis tubis 8 - 10 mmlongis, corollae tubis 1.8-2.2 cm longis, dense pubescentibus, corollae lobis 8.5-9.5 mmlongis, staminodiis lateralibus ovatis, 8-9 mm longis, labellis obovatis 14-18 mm longis,basi auriculatis, filamentis 2--2.5 cm lon…  相似文献   

8.
钱义咏   《广西植物》1990,10(3):184-185
<正> 江城万寿竹 新种 图 Disporum jiangchengense Y. Y. Qian, sp. nov. Species affinis D. calcarato D. Don, sea foliis membranaceis, petiolis 1—2.5 mm longis, umbelis 1—6-floribus, floribus albis vel pallide purpureis, perianthii segmentis 2.1—2.4 cm longis, calcaribus 6.5-8 mm longis differt.  相似文献   

9.
1 贵南棘豆 新种 图1 Oxytropis guinanensis Y. H.Wu,sp. nov. Species nova affinis O. stracheyanae Bunge, sed foliolis 4~7-jugis,5~16mm longis,bracteis 5~7mm longis, calycibus 12~14mm longis,vexillis c. 24mm longis, 12mmlatis, limbo ovato, supra medium constricto, apice truncato, alis c. 20 mm longis differt. Perennis, c. 11 cm alta, basi stipulis et petiolis dense persistibus. Radix palar is glan-dacea. Caulis nullus. Folia 3~10 cm longa; petioli 2~5 cm longi, cum rhachidibus supra sul-  相似文献   

10.
广西清风藤属一新种   总被引:2,自引:0,他引:2  
卵叶清风藤新种图1 Sabia ovalifolia S. Y. Liu, sp. nov. Fig. 1 Species affinis S. swinhoei Hemsl. ex Forb. et Hemsl. cui ramulis verticaliter villosis, foliisellipticis, ovato-ellipticis vel ovalibus, apice acuminatis vel caudato-acuminatis, cymis 2-7-floris,penduculis 7-15 mm longis, calycibus exms rubide puncticulatis, petalibus 3.5-5.5 mm longis,ovaris perfectis differt.  相似文献   

11.
The natural susceptibility of 131 Yersinia strains of Y. frederiksenii (n=38), Y. intermedia (n=48), Y. kristensenii (n=26) and Y. rohdei (n=19) to 70 antibiotics was tested. Minimum inhibitory concentration (MIC) values were determined with a microdilution procedure in IsoSensitest broth (all strains) and cation-adjusted Mueller Hinton broth (some strains). All species were naturally sensitive or sensitive and of intermediate susceptibility to tetracyclines, aminoglycosides, acylureidopenicillins, numerous cephalosporins, carbapenems, aztreonam, quinolones, chloramphenicol, folate-pathway inhibitors, nitrofurantoin, and fosfomycin. Uniform natural resistance was found with penicillin G, oxacillin, several macrolides, lincosamides, streptogramins, glycopeptides, rifampicin and fusidic acid. Species-specific differences in susceptibility affecting clinical assessment criteria were seen with aminopenicillins (in the presence and absence of beta-lactamase inhibitors), ticarcillin and some cephalosporins. Major medium-dependent susceptibilities were found with fosfomycin. beta-Lactam MIC susceptibility patterns suggested that most strains of the species tested produce both class A and class C (AmpC) beta-lactamases that are characteristic for the species. The present study describes a database concerning the natural susceptibility of some Y. enterocolitica-like species to a wide range of antibiotics, which can be applied to validate forthcoming antibiotic susceptibility tests of these strains and might contribute to their identification. An evaluation of 30 biochemical tests that secured phenotypic identification to the Yersinia species level is presented.  相似文献   

12.
The genus Yersinia is composed of 11 species, of which three (Y. pestis, Y. pseudotuberculosis, and Y. enterocolitica) have been exhaustively characterized. The remaining eight species (Y. frederiksenii, Y. intermedia, Y. kristensenii, Y. bercovieri, Y. mollaretii, Y. rohdei, Y. ruckeri, and Y. aldovae) have not been studied extensively and, because of the absence of classical Yersinia virulence markers, are generally considered to be nonpathogenic. However, recent data suggest that some of these eight species may cause disease by virtue of their having virulence factors distinct from those of Y. enterocolitica. These data raise intriguing questions about the mechanisms by which these species interact with their host cells and elicit human disease.  相似文献   

13.
I.C.Y     
《CMAJ》1965,92(3):136
  相似文献   

14.
Acid phosphatase, esterases, and glutamate and malate dehydrogenases of 192 strains of Yersinia enterocolitica, Y. intermedia, Y. aldovae, Y. frederiksenii, Y. kristensenii and Y. pseudotuberculosis were analysed by horizontal polyacrylamide agarose gel electrophoresis and by isoelectrofocusing in thin-layer polyacrylamide gels. The six species were clearly separated from each other by their distinct enzyme electrophoretic polymorphism. For Y. enterocolitica, the strains of biotype 5 were differentiated from the other biotypes by the mobility of glutamate dehydrogenase. For Y. frederiksenii, six zymotypes were delineated by pI and by the mobility of the enzymes. Variation in number or mobility of esterases within each species could represent a marker for epidemiological and ecological analyses. A linear relationship was obtained between the mean genetic diversity coefficient of enzymes and the mean percentage DNA-DNA relatedness of Y. intermedia, Y. aldovae, Y. enterocolitica and Y. frederiksenii.  相似文献   

15.
四川蜘蛛抱蛋的甾体皂甙   总被引:5,自引:0,他引:5  
从四川蜘蛛抱蛋(Aspidistra sichuanensis K。Y。Lang et Z。Y。Zhu)根状茎中分离得到三个甾体皂甙,经光谱和化学方法分别鉴定为22-甲氧基-5β-呋喃甾烷-1β,3β,4β,5β,26-五羟基26-O-β-D吡喃葡萄糖甙(1),蜘蛛抱蛋皂甙(2)和原蜘蛛抱蛋皂甙(3)。(1)是一个呋喃甾醇型单糖链的新皂甙,(3)是本植物的主要皂甙。  相似文献   

16.
17.
本文发表了一苏铁属新种,即秀叶苏铁,对其特征进行了阐述。  相似文献   

18.
Neuropeptide Y (NPY) is a 36-amino acid neuropeptide that exerts its activity by at least five different receptor subtypes that belong to the family of G-protein-coupled receptors. We isolated an aptamer directed against NPY from a nuclease-resistant RNA library. Mapping experiments with N-terminally, C-terminally, and centrally truncated analogues of NPY revealed that the aptamer recognizes the C terminus of NPY. Individual replacement of the four arginine residues at positions 19, 25, 33, and 35 by l-alanine showed that arginine 33 is essential for binding. The aptamer does not recognize pancreatic polypeptide, a highly homologous Y4 receptor-specific peptide of the gut. Furthermore, the affinity of the aptamer to the Y5 receptor-selective agonist [Ala(31),Aib(32)]NPY and the Y1/Y5 receptor-binding peptide [Leu(31),Pro(34)]NPY was considerably reduced, whereas Y2 receptor-specific NPY mutants were bound well by the aptamer. Accordingly, the NPY epitope was recognized by the Y2 receptor, and the aptamer was highly similar. This Y2 receptor mimicking effect was further confirmed by competition binding studies. Whereas the aptamer competed with the Y2 receptor for binding of [(3)H]NPY with high affinity, a low affinity displacement of [(3)H]NPY was observed at the Y1 and the Y5 receptors. Consequently, competition at the Y2 receptor occurred with a considerably lower K(i) value compared with the Y1 and Y5 receptors. These results indicate that the aptamer mimics the binding of NPY to the Y2 receptor more closely than to the Y1 and Y5 receptors.  相似文献   

19.
Five neuropeptide Y receptors, the Y1-, Y2-, Y4-, Y5- and y6-subtypes, have been cloned, which belong to the rhodopsin-like G-protein-coupled, 7-transmembrane helix-spanning receptors and bind the 36-mer neuromodulator NPY (neuropeptide Y) with nanomolar affinity. In this study, the Y2-receptor subtype expressed in a human neuroblastoma cell line (SMS-KAN) and in transfected Chinese hamster ovary cells (CHO-hY2) was characterized on the protein level by using photoaffinity labeling and antireceptor antibodies. Two photoactivatable analogues of NPY were synthesized, in which a Tyr residue was substituted by the photoreactive amino acid 4-(3-trifluoromethyl)-3H-diazirin-3-ylphenylalanine ((Tmd)Phe), [Nalpha-biotinyl-Ahx2,(Tmd)Phe36]NPY (Tmd36), and the Y2-receptor subtype selective [Nalpha-biotinyl-Ahx2,Ahx5-24,(Tmd)Phe27]N PY (Tmd27). Both analogues were labeled with [3H]succinimidyl-propionate at Lys4 and bind to the Y2-receptor with affinity similar to that of the native ligand. A synthetic fragment of the second (E2) extracellular loop was used to generate subtype selective antireceptor antibodies against the Y2-receptor. Photoaffinity labeling of the receptor followed by SDS-PAGE and detection of bound radioactivity and SDS-PAGE of solubilized receptors and subsequent Western blotting revealed the same molecular masses. Two proteins correspondingly have been detected for each cell line with molecular masses of 58 +/- 4 and 50 +/- 4 kDa, respectively.  相似文献   

20.
A novel class of potent and selective non-peptide neuropeptide Y (NPY) Y1 receptor antagonists, having benzazepine nuclei, have been designed, synthesized, and evaluated for activity. Through a blind screening we found the compound 1-N-(3-(N'-(tert-butoxycarbonyl)amino)benzyl)-7-methoxy-(3-(3)-methyl ureido)-2,3,4,5-tetrahydro-1H-1-benzazepin-2-one (9: IC50 = 1.6 microM). Chemical modifications of 9 gave a potent NPY Y1 antagonist 3-(N-(4-hydroxyphenyl)-N'-methylguanidino)-1-N-(3-(N'-(tert-butoxy carbonyl)amino)benzyl)-2,3,4,5-tetrahydro-1H-1-benzazepin-2-one (14c: IC5(0=43 nM), which had no affinity for NPY Y2 and Y5 receptors.  相似文献   

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