全文获取类型
收费全文 | 71篇 |
免费 | 1篇 |
出版年
2023年 | 1篇 |
2022年 | 2篇 |
2021年 | 1篇 |
2018年 | 3篇 |
2016年 | 1篇 |
2014年 | 2篇 |
2013年 | 1篇 |
2012年 | 4篇 |
2011年 | 2篇 |
2010年 | 2篇 |
2007年 | 3篇 |
2006年 | 3篇 |
2005年 | 3篇 |
2003年 | 6篇 |
2002年 | 4篇 |
2000年 | 1篇 |
1998年 | 1篇 |
1997年 | 1篇 |
1990年 | 2篇 |
1989年 | 2篇 |
1988年 | 4篇 |
1986年 | 5篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1981年 | 1篇 |
1980年 | 1篇 |
1979年 | 1篇 |
1975年 | 1篇 |
1974年 | 2篇 |
1973年 | 3篇 |
1972年 | 2篇 |
1971年 | 2篇 |
1970年 | 1篇 |
1964年 | 2篇 |
排序方式: 共有72条查询结果,搜索用时 15 毫秒
31.
Gum katira, an insoluble gum derived from the bark of Cochlospermum religiosum, has been successfully used as a gelling agent in tissue culture media for in vitro shoot formation and rooting in Syzygium cuminii and somatic embryogenesis in Albizzia lebbeck. The epicotyl segments, excised from in vitro grown seedlings of S. cuminii, developed shoots when cultured on MS medium (Murashige and Skoog, 1962), supplemented with 4% sucrose and 1 mg l–1 BA. The so-developed shoots were rooted on Knop's medium, augmented with 2% sucrose and 1 mg l–1 IAA. For somatic embryogenesis, hypocotyl segments derived from in vitro developed seedlings of A. lebbeck were cultured on B5 medium containing 2% sucrose. Media were gelled with either 3% gum or 0.9% agar. The quantitative response obtained on media fortified with either of the gelling agents was not significantly different. The media gelled with gum katira were almost as transparent as the liquid medium. However, viscosity of gum katira gelled medium was less than one-sixth of the viscosity of agar-gelled media, and therefore, shaking ofthe culture vessel often resulted in submersion of the explants. Nevertheless, even these submerged explants responded positively. To increase the firmness of the gum katira-gelled medium, various combinations of agar (0.2–0.6%) and gum (1–3%) were used. However, the viscosities of the media gelled with 3% gum katira as well as different concentrations of agar (0.2–0.6%) were lower than that of the medium containing only gum katira (3%). Moreover, the explant productivity obtained in neither of these combinations was more than those recorded on the control media, which were gelled either with 0.9% agar or 3% gum alone. 相似文献
32.
By using the hindered tris(pyrazolyl)borate ligand TpiPr2 (hydrotris(3,5-diisopropyl-1-pyrazolyl))borate, both mono- and binuclear complexes of cobalt [TpiPr2Co](X) (X = NO3 and OBz) and [TpiPr2Co]2(μ-X)(μ-OBz) (X = OH, N3) were synthesized. The nitrato complex, [TpiPr2Co](NO3) (1), which could be converted to (2), was prepared by reaction of KTpiPr2 with hydrated Co(NO3)2 and its molecular structure was determined by X-ray crystallography. The dinuclear di(μ-hydroxo) complex, [TpiPr2Co]2(μ-OH)2 (2), which was obtained by treatment of 1 with aqueous NaOH, reacted with one equivalent of benzoic acid to give the (μ-benzoato)(μ-hydroxo) complex, [TpiPr2Co]2(μ-OH)(μ-OBz) (3). X-ray crystallography shows the presence of both hydroxy and carboxylate group as bridging ligands and both cobalt metals are in five coordination environment in 3. The μ-azido complex, [TpiPr2Co]2(μ-N3)(μ-OBz) (5), was prepared by reaction of 3 with one equivalent of aqueous sodium azide. The spectroscopic studies suggested μ-1,1-bridging nature of group in this complex. The reaction of 2 with excess amount of benzoic acid resulted in the destruction of the bimetallic core to give the mononuclear carboxylato complex, [TpiPr2 Co](OBz) (4), which was characterized by X-ray crystallography. 相似文献
33.
34.
35.
36.
Rajeev K. Varshney S. Murali Mohan Pooran M. Gaur N.V.P.R. Gangarao Manish K. Pandey Abhishek Bohra Shrikant L. Sawargaonkar Annapurna Chitikineni Paul K. Kimurto Pasupuleti Janila K.B. Saxena Asnake Fikre Mamta Sharma Abhishek Rathore Aditya Pratap Shailesh Tripathi Subhojit Datta S.K. Chaturvedi Nalini Mallikarjuna G. Anuradha Anita Babbar Arbind K. Choudhary M.B. Mhase Ch. Bharadwaj D.M. Mannur P.N. Harer Baozhu Guo Xuanqiang Liang N. Nadarajan C.L.L. Gowda 《Biotechnology advances》2013
37.
The paper reports stimulatory effect of nitric oxide (NO) on in vitro caulogenesis in Albizzia
lebbeck, a tree legume. Exogenously supplied NO donor, sodium nitroprusside (SNP) stimulated shoot differentiation from hypocotyl
explants of Albizzia lebbeck, excised from its in vitro seedlings. Potassium ferrocyanide, a structural analog of SNP incapable of releasing NO, did not
promote shoot organogenesis. Likewise, metabolic products of NO, NO2
− and NO3
−, provided as NaNO2 and NaNO3 did not enhance shoot differentiation. The NO scavenger, 2-(4-carboxy-phenyl)-4, 4, 5, 5-tetramethylimideazoline-1-oxyl-3-oxide
(cPTIO), supplemented along with SNP, at equimolar concentration, reversed the stimulatory effect of the latter, thus, confirming
the role of NO in promotion of in vitro caulogenesis. The transfer of explants cultured on the basal medium (BM) to the same
containing SNP and vice versa after different time intervals revealed that for its enhancing effect, SNP was required only
during the initial phase (5 days) of culture. Its presence or administration beyond 5 days neither promoted nor inhibited
the caulogenic response. 相似文献
38.
39.
Effect of Carbon Source on the Shoot Proliferation Potential of Epicotyl Explants of Syzygium cuminii 总被引:2,自引:0,他引:2
Black plum (Syzygium cuminii) explants were grown in vitro on Murashige and Skoog medium. Among the various saccharides tested, the best caulogenic response was afforded by sucrose
both in terms of explant response and shoot developing potential. Within monosaccharides, mannose was totally inhibitory as
on the medium supplemented with this the shoot buds failed to develop, while, fructose and xylose completely inhibited the
opening as well as the elongation of shoot buds. Glucose and galactose did not completely inhibit the caulogenic response.
Among disaccharides, other than sucrose, maltose totally inhibited the elongation of the developed shoot buds while lactose
supported it to a limited extent. Sugar alcohols, though not as good as sucrose, proved better sources of carbon and energy
than the other tested sugars. Sucrose at concentration 4 % proved to be the best in developing 4.2 shoots per explant.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
40.