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排序方式: 共有93条查询结果,搜索用时 15 毫秒
1.
A. B. Martynenko 《Biology Bulletin》2009,36(2):184-192
Species groups formed in light coniferous forests prevailing in southeastern Russia are considered using the example of butterflies. Problems concerning the formation of species composition and its originality in some insects groups are discussed. A classification analysis of species checklists for twelve local faunas of Transbaikalia and the southern Far East of Russia is performed. It is shown that the faunas of areas occupied by light coniferous forests have a common background. 相似文献
2.
V V Smirnov E L Mishenkova Iu A Grinevich G T Petrenko S V Martynenko 《Antibiotiki i khimioterapii͡a》1990,35(6):31-34
It was shown that asterin therapy performed on a model of spontaneous metastasis markedly changed the content of the thymus serum factor in mice and normalized its level. The inducing mechanism of the drug's antitumor action was realized both at the stage of the metastatic postinvasion phase and during its terminal period which was probably due to an increase in the influence of the thymus on the immune system and evident from an increase in the therapeutic action of the drug. 相似文献
3.
Methods for immobilizing champagne yeasts, physiological and biochemical characteristics of the immobilized cells, and problems of their utilization in the production of quality champagne wines are reviewed. Studies aimed at the development of efficient biocatalysts for champaignizing wines using bottle fermentation (method champenoise) and tank processing (bulk, or Charmat process), based on the use of immobilized yeast cells, are described. Data on the industrial use of such biocatalysts in countries manufacturing champagne wines are presented. Problems and prospects of further research in this field are discussed. 相似文献
4.
L D Martynenko E V Vladimirova R G Loverdo E V Chertishcheva 《Antibiotiki i khimioterapii͡a》1990,35(9):45-47
Data on the frequency of intestinal infections caused by Klebsiella spp. in infants at the age of 1 month to 1 year and antibiotic resistance of K. pneumoniae and K. oxytoca isolates from newborns and infants aged 1 month to 1 year are presented. The frequency of the Klebsiella isolates from the newborns and infants at the age of 1 month to 1 year with acute intestinal infections amounted to 17.7 +/- 1.4 and 42.5 +/- 1.4 per cent, respectively. The majority of the clinical strains had a multiple resistance to 7-9 drugs. The overwhelming majority of the strains were sensitive to gentamicin, monomycin, kanamycin, neomycin and polymyxin B. 相似文献
5.
Plasma Physics Reports - It is shown theoretically that under the effect of plasma flows typical of transient processes in tokamaks not only can Kelvin–Helmholtz instability develop and waves... 相似文献
6.
V. P. Budaev Yu. V. Martynenko L. N. Khimchenko A. M. Zhitlukhin N. S. Klimov R. A. Pitts J. Linke B. Bazylev N. E. Belova A. V. Karpov D. V. Kovalenko V. L. Podkovyrov A. D. Yaroshevskaya 《Plasma Physics Reports》2013,39(11):910-924
Targets made of ITER-grade 316L(N)-IG stainless steel and Russian-grade 12Cr18Ni10Ti stainless steel with a close composition were exposed at the QSPA-T plasma gun to plasma photonic radiation pulses simulating conditions of disruption mitigation in ITER. After a large number of pulses, modification of the stainless-steel surface was observed, such as the formation of a wavy structure, irregular roughness, and cracks on the target surface. X-ray and optic microscopic analyses of targets revealed changes in the orientation and dimensions of crystallites (grains) over a depth of up to 20 μm for 316L(N)-IG stainless steel after 200 pulses and up to 40 μm for 12Cr18Ni10Ti stainless steel after 50 pulses, which is significantly larger than the depth of the layer melted in one pulse (~10 μm). In a series of 200 tests of ITER-grade 316L(N)-IG ITER stainless steel, a linear increase in the height of irregularity (roughness) with increasing number of pulses at a rate of up to ~1 μm per pulse was observed. No alteration in the chemical composition of the stainless-steel surface in the series of tests was revealed. A model is developed that describes the formation of wavy irregularities on the melted metal surface with allowance for the nonlinear stage of instability of the melted layer with a vapor/plasma flow above it. A decisive factor in this case is the viscous flow of the melted metal from the troughs to tops of the wavy structure. The model predicts saturation of the growth of the wavy structure when its amplitude becomes comparable with its wavelength. Approaches to describing the observed stochastic relief and roughness of the stainless-steel surface formed in the series of tests are considered. The recurrence of the melting-solidification process in which mechanisms of the hill growth compete with the spreading of the material from the hills can result in the formation of a stochastic relief. 相似文献
7.
Martynenko NN Gracheva IM Sarishvili NG Zubov AL El'-Registan GI Lozinskiĭ VI 《Prikladnaia biokhimiia i mikrobiologiia》2004,40(2):186-193
Wine champagnizing, a process involving the use of champagne yeasts immobilized by inclusion into cryogels of polyvinyl alcohol, has been studied. Treatment of yeast cells with the autoregulatory factor d1 was proposed as a means of preventing the cell escape from the carrier matrix. Such a treatment inhibited growth and proliferation processes in yeasts cells, without affecting the activity of fermentation; the resulting champagne had the same organoleptic and chemical characteristics as its counterparts obtained using traditional techniques. 相似文献
8.
Genetic analysis of the short-stem populations of rye (Secale cereale L.) for the plant height trait
The process and results of genetic analysis of the short-stem rye populations (Secale cereale L.) for the trait "plant height" are described. The analysis has been performed with the joint scaling test using data of estimation of the parental and hybrid populations developed in the cyclic reciprocal crosses between four initial populations. Monogenic, digenic, and trigenic differences between parental rye populations for two genes of incomplete dominance and one multiallelic gene with additive allelic interaction were determined. 相似文献
9.
Mason T. MacDonald Rajasekaran R. Lada Alex I. Martynenko Martine Dorais Steeve Pepin Yves Desjardins 《Trees - Structure and Function》2010,24(5):879-886
Post-harvest needle abscission is a major challenge for Christmas tree and greenery industries. It was hypothesized that ethylene
triggers abscission in balsam fir. Three experiments were conducted to test this hypothesis. In experiment 1, 70 balsam fir
branches were collected, placed in water, and ethylene evolution was observed over time. In experiment 2, a 2 × 5 factorial
experiment was designed to determine the effect of exogenous ethylene and an ethylene receptor blocker, 1-methylcyclopropene
(1-MCP), on needle abscission. In experiment 3, a 2 × 6 factorial experiment was designed to determine the effect of exogenous
ethylene and an ethylene inhibitor, aminoethoxyvinylglycine (AVG), on needle abscission. It was found that ethylene evolution
was the highest 1–2 days prior to needle abscission, which was consistent in untreated branches and branches exposed to exogenous
ethylene. Exposure to exogenous ethylene significantly decreased needle retention by 63%. When ethylene receptors were blocked
by 1-MCP, needle retention increased by 147% despite the presence of ethylene and increased by 73% in the absence of ethylene
when compared to the respective controls. When endogenous ethylene synthesis was inhibited by AVG, there was no improvement
in needle retention in the presence of ethylene, but there was a 113% increase in needle retention in the absence of exogenous
ethylene. Ethylene is strongly implicated as the signal triggering abscission in root-detached balsam fir. 相似文献
10.
Using yeast genome databases and literature data, phylogenetic analysis of pectinase PGU genes from 112 Saccharomyces strains assigned to the biological species S. arboricola, S. bayanus (var. uvarum), S. cariocanus, S. cerevisiae, S. kudriavzevii, S. mikatae, S. paradoxus, and the hybrid taxon S. pastorianus (syn. S. carlsbergensis) was carried out. A superfamily of divergent PGU genes was found. Natural interspecies transfer of the PGU gene both from S. cerevisiae to S. bayanus and from S. paradoxus to S. cerevisiae may, however, occur. Within the Saccharomyces species, identity of the PGU nucleotide sequences was 98.8–100% for S. cerevisiae, 86.1–95.7% for S. bayanus (var. uvarum), 94–98.3% for S. kudriavzevii, and 96.8–100% for S. paradoxus/S. cariocanus. For the first time, a family of polymeric PGU1b, PGU2b, PGU3b and PGU4b genes is documented for the yeast S. bayanus var. uvarum, a variety important for winemaking. 相似文献