日光温室牡丹花石榴光合特性研究   总被引：1，自引：0，他引：1  

王彪郭修武  蒋锦标王国栋 那颖 《北方园艺》2007,(6):96-98

以LI-6400光合作用测定系统对日光温室牡丹花石榴的光合特性进行测定。结果表明,在晴天条件下,牡丹花石榴光合速率日变化呈双峰曲线,最高峰在8时,次峰在15时,中午有明显的“午休”现象。光合作用的光补偿点和饱和点分别为32μmol/m2/s和1200μmol/m2/s,CO2补偿点和饱和点分别为16μmol/mol和850μmol/mol。  相似文献   

Red clover mottle virus from Ukraine is an isolate of RCMV strain S     

L.G. Lapchic  A.J. Clark  G.P. Lomonossoff  M. Shanks 《European journal of plant pathology / European Foundation for Plant Pathology》1998,104(4):409-412

The relationship between red clover mottle virus (RCMV) isolated in the Ukraine (designated RCMV-Uk) and well-characterised strains from Sweden has been investigated. Nucleic acid hybridisation indicate that both RNAs from RCMV-Uk are highly homologous to their counterparts from RCMV strain S, a conclusion supported by protein sequence analysis of the two viral capsid proteins. Nucleic acid sequence analysis of a portion of RCMV-Uk RNA2 confirmed the high degree of similarity between RCMV-Uk and RCMV strain S. This information suggests that RCMV-Uk should be considered an isolate of RCMV strain S.  相似文献   

Affinity of detomidine, medetomidine and xylazine for alpha-2 adrenergic receptor subtypes     

D.D. Schwartz  & T.P. Clark 《Journal of veterinary pharmacology and therapeutics》1998,21(2):107-111

α₂-Adrenergic receptor agonists are widely used in veterinary medicine as sedative/hypnotic agents. Four pharmacological subtypes of the α₂-adrenergic receptor (A, B, C and D) have been identified based primarily on differences in affinity for several drugs. The purpose of this study was to examine the affinities of the sedative agents, xylazine, detomidine and medetomidine at the four α₂-adrenergic receptor subtypes. Saturation and inhibition binding curves were performed in membranes of tissues containing only one subtype of a₂-adrenergic receptor. The K_D for the α₂-adrenergic receptor radioligand, [³H]-MK-912, in HT29 cells (α_2A-), neonatal rat lung (α_2B-), OK cells (α_2C-) and PC12 cells transfected with RG20 (α_2D-) were 0.38 ± 0.08 n m , 0.70 ± 0.5 n m , 0.07 ± 0.02 n m and 0.87 ± 0.03 n m , respectively. Detomidine and medetomidine had approximately a 100 fold higher affinity for all the α₂-adrenergic receptors compared to xylazine but neither agonist displayed selectivity for the α₂-adrenergic receptor subtypes. These data suggest that available sedative/hypnotic α₂-adrenergic receptor agonists can not discriminate between the four known α₂-adrenergic receptor subtypes.  相似文献   

云南省生物资源开发创新产业信息网络建设   总被引：3，自引：1，他引：2  

陈良正  沈钰  李兵  王亚泓  纳涵 《农业图书情报学刊》2004,15(3):11-17

本文简单介绍了云南省生物资源开发创新产业信息网络建设规划研究和实施情况 ,如网络设计目标、体系结构选择、信息资源建设规划、网络的搭建以及数据库的建设构想等  相似文献   

Environmental role of nitrogen-fixing blue-green algae and asymbiotic bacteria: U. Granhall (Editor). Ecological Bulletins NFR,Stockholm, No. 26 1978, 391 pp     

Francis Clark 《Geoderma》1979,22(4):337

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Further studies of the origin of russeting in the potato     

Charles F. Clark 《American Journal of Potato Research》1933,10(5):88-91

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Artificial light as an aid in potato breeding     

F. J. Stevenson  C. F. Clark 《American Journal of Potato Research》1933,10(6):103-107

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The fungicidal activity of substituted 1,4-naphthoquinones. Part III: Amino,anilino and acylamino derivatives     

Nigel G. Clark 《Pest management science》1985,16(1):23-32

A variety of 2-amino-, 2-anilino- and 2-acylamino-1, 4-naphthoquinones, with hydrogen, chlorine, alkoxy, phenoxy, methylthio or phenylthio as the 3-substituent, have been synthesised and assayed against Botrytis cinerea, Cladosporium fulvum and Venturia inaequalis. With few exceptions, only the 2-acylamino compounds possessed appreciable fungicidal activity: this was of a high order in the cases of 2-prop-ionamido-, 2-N-methylacetamido-3-methylthio-, and 3-methoxy-2-N-methylacetamido-1, 4-naphthoquinones.  相似文献   

两种常温固化木材胶粘剂胶接强度分析     

岳孔  卢晓宁  黄河浪  那斌 《林业科技开发》2007,21(2):54-57

对两种木材用常温固化胶粘剂--单宁-甲醛胶粘剂和聚氨酯胶粘剂胶接的速生杨木的静态剪切强度进行了测试与分析.研究结果表明,以速生杨I-72为被胶接对象,自制的双组分型单宁胶压缩剪切强度范围为8.08～8.92MPa,但木破率较低,要满足日本集成材JAS标准中用胶规定,需进一步研究改进.相比较而言,聚氨酯胶粘剂的胶接强度较高,其压缩剪切强度值均在9.8MPa以上,木破率在75%以上,能够满足日本集成材JAS标准中用胶的规定.  相似文献   

Diagnosis of ovine fascioliasis by a dot enzyme-linked immunosorbent assay: a rapid microdiagnostic technique     

G L Zimmerman  M J Nelson  C R Clark 《American journal of veterinary research》1985,46(7):1513-1515

A microenzyme-linked immunosorbent assay (dot-ELISA) was modified for making an immunodiagnosis of Fasciola hepatica infections in sheep. Sheep were alloted as follows: group I-3 controls and 4 principals, each inoculated with 500 metacercariae; group II-3 controls and 7 principals, each inoculated with 250 metacercariae; and group III-3 controls and 7 principals, each inoculated with 500 metacercariae. Blood and fecal samples were collected from each animal every 2 weeks for 16 weeks. Presence (or absence) of flukes was confirmed by fecal examinations and examination of dissected livers at necropsy of the sheep. The dot-ELISA incubations were done at ambient room temperature. Nitrocellulose disks dotted with 1 microliter (50 ng of protein) of F hepatica excretory/secretory products were placed in 96-well tissue culture plates. After nonspecific binding sites on the disks were bound with bovine serum albumin-triethanolamine-buffered saline solution, dilutions (1:2) of positive- and negative-control serum samples or experimental serum samples were placed in appropriate wells for a 30-minute incubation. Wells were washed (3 times), and 50 microliters of horseradish peroxidase conjugated rabbit anti-sheep immunoglobulin G was added to each well for a 30-minute incubation and then aspirated. Substrate solution (4-chloro-1-naphthol, methanol, triethanolamine-buffered saline solution, and H2O2; 50 microliters) was added for a 30-minute incubation and then aspirated. Disks were air dried for visualization: solid purple dot = positive sample, or no dot = negative sample.(ABSTRACT TRUNCATED AT 250 WORDS)  相似文献