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Di Patrizi L Rosati F Guerranti R Pagani R Gerwig GJ Kamerling JP 《Glycoconjugate journal》2006,23(7-8):599-609
Mucuna pruriens seeds are used in some countries as a human prophylactic oral anti-snake remedy. Aqueous extracts of M. pruriens seeds possess in vivo activity against cobra and viper venoms, and protect mice against Echis carinatus venom. It was recently demonstrated that the seed immunogen generating the antibody that cross-reacts with the venom proteins
is a multiform glycoprotein (gpMuc), and the immunogenic properties of gpMuc seemed to mainly reside in its glycan chains.
In the present study, gpMuc was found to contain only N-glycans. Part of the N-glycans could be released with peptide-(N
4-(N-acetyl-β -glucosaminyl)asparagine amidase F (PNGase F-sensitive N-glycans); the PNGase F-resistant N-glycans were PNGase
A-sensitive. The oligosaccharides released were analyzed by a combination of MALDI-TOF mass spectrometry, HPLC profiling of
2-aminobenzamide-labelled derivatives and 1H NMR spectroscopy. The PNGase F-sensitive N-glycans comprised a mixture of oligomannose-type structures ranging from Man5GlcNAc2 to Man9GlcNAc2, and two xylosylated structures, Xyl1Man3GlcNAc2 and Xyl1Man4GlcNAc2. The PNGase A-sensitive N-glycans, containing (α 1-3)-linked fucose, were identified as Fuc1Xyl1Man2GlcNAc2 and Fuc1Xyl1Man3GlcNAc2. In view of the determined N-glycan ensemble, the immunoreactivity of gpMuc was ascribed to the presence of core (β 1-2)-linked
xylose- and core α (1-3)-linked fucose-modified N-glycan chains. 相似文献
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Shun Kobayashi Somsak Panha Teerapong Seesamut Nattawadee Nantarat Natdanai Likhitrakarn Tetsuo Denda Masako Izawa 《Ecology and evolution》2021,11(24):17604
This study aims to identify the flower visitors of Mucuna thailandica (Fabaceae), endemic plant species in montane forests in Thailand, to determine their potential pollinators. The genus Mucuna produces papilionaceous flowers and has an explosive flower‐opening step. Explosive opening rapidly exposes stamens and pistil from keel petals and releases pollen. The flower of this species depends completely on animals to perform this step, essential for pollination success. Using a camera trap survey, we revealed that non‐flying mammals, such as squirrels (Callosciurus sp.) and masked palm civets (Paguma larvata), opened flowers explosively. Thus, these mammals contribute to the pollination of M. thailandica. This is the first report of non‐flying mammals contributing to pollination in montane forests in tropical Asia. 相似文献
5.
L. G. Quintanilla S. Pajarón E. Pangua J. Amigo 《Plant biology (Stuttgart, Germany)》2000,2(6):612-617
Abstract: Spore germination of Culcita macrocarpa C. Presl and Woodwardia radicans (L.) Sm. from nine populations at the northern limit of their distribution, in the northwest Iberian Peninsula, was investigated. In a first experiment, population type and temperature (10, 15, 20, and 25 °C) were both found to affect germination percentage and germination time significantly in both species. There were also significant interactions between the two factors with respect to the percentage germination of C. macrocarpa and the germination time of W. radicans. In C. macrocarpa there was an outstanding increase in germination time at 15 °C and, above all, at 10 °C, whereas in W. radicans the most remarkable result was the existence of two populations with especially low germination percentages. In a second experiment, germination of 20 individuals from each population of W. radicans was compared with similar inter-population differentiation. Although its variability possibly has a genetic basis, these species are able to germinate successfully, and it seems probable that the season in which it occurs depends more on spore release than on thermal conditions in the populations. The effect of temperature on germination in both species does not explain their coastal distribution. Temperature is probably more important in limiting other stages of the life cycle. 相似文献
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An efficient plant regeneration system for Mucuna pruriens L. (DC.) using cotyledonary node explants
Summary The purpose of this study was to develop an efficient micropropagation system for Mucuna pruriens, an important medicinal plant in India. A range of cytokinins was investigated for multiple shoot regeneration with cotyledonary
node explants from 7-d-old aseptic seedlings. Of all the cytokinins, 6-benzyladenine (BA), kinetin (KIN) and 2-isopentenyl
adenine (2-iP) tested in Murashige and Skoog medium (MS), BA was the most effective and 5.0 μM was found to be optimum for inducing maximum shoots. Medium types, medium strength and pH were also investigated for induction
and proliferation of shoots. The highest efficiency of shoot proliferation was observed in 5.0 μM BA and 0.5 μM α-naphthalene acetic acid (NAA) in half-strength MS medium at pH 5.8. The best condition for rooting was half-strength MS
medium solidified with agar and with 2.0 μM indole-3-butyric acid (IBA). After rooting, the plantlets were transferred to plastic pots filled with sterile soilrite where
90% grew and all exhibited normal development. 相似文献
8.
The health-relevant functionality of Mucuna pruriens was improved by priming the seeds with elicitors of the pentose phosphate pathway (PPP) such as fish protein hydrolysates (FPHs), lactoferrin (LF) and oregano extract (OE) followed by dark germination. FPH elicited the highest phenolic content of 19 mg/g FW on day 1, which was 38% higher than control sprouts. OE enhanced Parkinson’s disease-relevant L-DOPA content by 33% on day 1 compared to control sprouts. Anti-diabetes-relevant α-amylase inhibition percent (AIP) and α-glucosidase inhibition percent (GIP) were high in the cotyledons and decreased following elicitation and sprouting. For potential anti-diabetic applications, low AIP and high GIP with moderate L-DOPA content on day 4 of dark germination could be optimal. Improved L-DOPA concentrations in a soluble phenolic and antioxidant-rich M. pruriens background on day 1 sprouts have potential for Parkinson’s disease management. 相似文献
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Cytokinin-like effects of pure caffeine were tested in bioassays specific for this hormonal activity [radish cotyledon growth
and chlorophyll (Chl) biosynthesis in cucumber cotyledon and tobacco cell suspension] and in cell elongation bioassays [elongation
of segments from soybean internode and internode elongation in dwarf cultivars of guandu (Cajanus cajan) and mucuna (Mucuna
deeringiana)]. 6-Benzyl-aminopurine and kinetin (KIN) were used for comparison with caffeine. Although weaker than those given
by cytokinins, positive responses were observed in all specific bioassays and in elongation of soybean internodes. A remarkable
synergistic effect between caffeine and KIN was observed for the synthesis of Chl in the tobacco cell suspension bioassay,
in which different concentrations of the alkaloid were combined with a single concentration of KIN. The hormone-like effect
of caffeine might be related to the resemblance between caffeine and adenine derivatives.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献