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排序方式: 共有175条查询结果,搜索用时 218 毫秒
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Alvarado-Vázquez MA R Foroughbakhch MA Guzmán- Lucio A Rocha-Estrada JL Hernández-Piñero ML Cárdenas-Ávila BM Soto-García 《Phyton》2015,84(1):70-79
Candelilla (Euphorbia antisiphylitica Zucc.) is a very important plant resource in the arid lands of Northern Mexico. This is because the wax content coating the stem has unique properties which have been useful for multiple applications in the food industry, electronics, cosmetics, etc. However, the intensive exploitation of this resource has caused a great decrease in the populations of this species making necessary to consider strategies for their conservation and sustainable use. One of the primary needs with regeneration purposes is to know their reproductive processes, particularly the biotic and/or abiotic factors that determine the viability and germination of seeds. The present study evaluated the (1) germination and seed viability in relation to the ripeness degree of the fruit at the time of collection, (2) weight of the seed (low, medium and high), and (3) storage time (1, 3, and 5 months). Fruits from four locations, two in the State of Coahuila (Las Coloradas and Candela) and two in the State of Nuevo Leon (Icamole 1 and Icamole 2), were collected. Three germination assays were carried out corresponding to each month of storage. Seed viability was determined by the tetrazolium test. The average weight of the candelilla seeds was 0.0029 ± 0.0010 g, with extreme average values of 0.0018 ± 0.0006 g at Las Coloradas and 0.0036 ± 0.0010 g in Icamole 2. Those seeds with heavier weight obtained from red fruits and with 1 month of storage showed the highest average percentage of viability (66.87 ± 24.19%). At the same time, seeds with around average weight, obtained from red fruits and five months of storage, showed the highest average germination percentage (50.00 ± 9.42%). 相似文献
155.
Benvenuti S Cramer R Quinn CC Bruce J Zvelebil M Corless S Bond J Yang A Hockfield S Burlingame AL Waterfield MD Jat PS 《Molecular & cellular proteomics : MCP》2002,1(4):280-292
Normal somatic cells undergo a finite number of divisions and then cease dividing whereas cancer cells are able to proliferate indefinitely. To identify the underlying mechanisms that limit the mitotic potential, a two-dimensional differential proteome analysis of replicative senescence in serially passaged rat embryo fibroblasts was undertaken. Triplicate independent two-dimensional gels containing over 1200 spots each were run, curated, and analyzed. This revealed 49 spots whose expression was altered more than 2-fold. Of these, 42 spots yielded positive protein identification by mass spectrometry comprising a variety of cytoskeletal, heat shock, and metabolic proteins, as well as proteins involved in trafficking, differentiation, and protein synthesis, turnover, and modification. These included gelsolin, a candidate tumor suppressor for breast cancer, and alpha-glucosidase II, a member of the family of glucosidases that includes klotho; a defect in klotho expression in mice results in a syndrome that resembles human aging. Changes in expression of TUC-1, -2, -4, and -4 beta, members of the TUC family critical for neuronal differentiation, were also identified. Some of the identified changes were also shown to occur in two other models of senescence, premature senescence of REF52 cells and replicative senescence of mouse embryo fibroblasts. The majority of these candidate proteins were unrecognized previously in replicative senescence. They are now implicated in a new role. 相似文献
156.
In vivo expansion of functionally integrated GABAergic interneurons by targeted increase in neural progenitors
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157.
Jawahar Lal Jat Swati Ojha Dinesh Bhambi Neelam Dhakar 《Journal of enzyme inhibition and medicinal chemistry》2013,28(6):882-887
A facile synthesis of 5,5′-(1,4-phenylene)bis(3-aryl-2-pyrazolines) 4a-g has been achieved by the cyclo-addition reaction of hydrazine hydrate with bis-substituted chalcones 3a-g, which in turn were prepared by the Clasien-Schmidt condensation of p-substituted acetophenones 1a-g with terephthaldehyde. Condensation of 4a-g with ω-bromoalkoxyphthalimides 5a-b afforded the titled compounds 6a-n, some of which exhibited significant antimalarial as well as antimicrobial activity. 相似文献
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Krishanu Mukherjee Everly Conway de Macario Alberto JL Macario Luciano Brocchieri 《BMC evolutionary biology》2010,10(1):64