共查询到20条相似文献,搜索用时 31 毫秒
1.
M. Chippaux D. Giudici A. Abou-Jaoudé F. Casse M. C. Pascal 《Molecular & general genetics : MGG》1978,160(2):225-229
Summary Mutants of E. coli, completely devoid of nitrite reductase activity with glucose or formate as donor were studied. Biochemical analysis indicates that they are simultaneously affected in nitrate reductase, nitrite reductase, fumarate reductase and hydrogenase activities as well as in cytochrome c552 biosynthesis. The use of an antiserum specific for nitrate reductase shows that the nitrate reductase protein is probably missing. A single mutation is responsible for this phenotype: the gene affected, nir R, is located close to tyr R i.e. at 29 min on the chromosomal map.Abbreviations BV
Benzyl-Viologen
- NTG
N-methyl-N-nitro-N-nitrosoguanidine
- NR
nitrate reductase
- NIR
nitrite reductase
- FR
fumarate reductase
- HYD
hydrogenase
- CYT c552
cytochrome c552 相似文献
2.
3.
Before the antibiotic’s era, the clinicians have shown the relation between epididymitis and Infertility. At the moment, venerial diseases are the principal cause of Epididymitis by the young man. The early diagnosis of the urethral infection (acute or not) associated with a suitable antibiotherapy will allow to protect the fertility. 相似文献
4.
5.
6.
7.
8.
9.
10.
11.
J. Rubtzov 《BioControl》1957,2(2):125-128
Summary The biological control in the U.S.S.R. is used against about 20 insect pests. The development of biological control realized
in these lines:a) guarding and accumulation of useful entomophagous insects in nature;b) laboratory breeding, seasonal colonization and overflooding in breeding places of pests;c) introduction and acclimatization of the effective foreign entomophagous insects;d) inland distribution;e) use of indigenous entomophagous insects and raising of their effectivness by selection and hybridization.
Резюме Биологический метод боръбы в СССР исполъзуется примерн о против 20 видов вредних насекомых. Развитие биологического метода борщбы с вредителями идет в направлениях: а) охраны и “накопления” энтомофагов в природе; б) искусственного размножения энтомофагов в лаборатории и сезонной колонизации их в очагах размножения вредителей; в) интродукции и акклиматизации испытанных иноземных энтомофагов; г) внутриареeлъного расселения эффективных, но локалъно распространенных полезных видов энтомофалов; д) исполъэования местных, абориленных энтомофагов, путем повыщения их эффективности методами отбора и гибридизации.相似文献
12.
Two new species of Magnoliaceae, Magnolia jaenensis and M. manguillo, from the Department of Cajamarca, Peru, are described. Magnolia jaenensis is similar to M. yarumalensis but differs in the shape of the leaves and sepals, number of petals, stem and carpels. Magnolia manguillo differs from M. henaoi, M. bankardiorum, and M. virolinensis in the length of the petiole, number of secondary leaf veins, shape and length of the vaginal hypsophyll, shape of sepals, and number of carpels. Both species are the first records of Magnolia for the Peruvian montane forest at elevations above 2100 m. Furthermore, information about phenology, habitat, and conservation status are provided for each species. 相似文献
13.
14.
15.
16.
《昆虫分类学报》编辑部 《昆虫分类学报》2003,25(4):318-318
Prof.ManiwasbornatTanjorein1910andaafterbrillianteducationalcareer,settledintoavariedprofessionalcareer,mainlyasateacherandguideforhundredsofstudentsofresearchinEntomology,spanningawidevarietyofinstitutessuchasZoologicalSurveyofIndia,Calcutta,ImperialAgriculturalInstituteofPusainDelhi(astheIndianAgiculturalResearchInstitutewasthenknown),ProfessorofZoologyinSt.JohnsCollege,AgraandProfessorEmeritus,BotanyDepartmentofPresidencyCollege,Madras.HefoundedtheprestigiousSchoolofEntomologyIn… 相似文献
17.
18.
Tim Doherty 《Ecological Management & Restoration》2014,15(3):e9-e9
19.