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101.
102.
I V Samarina I F Taran V A Proskurina L V Liapustina 《Antibiotiki i khimioterapii͡a》1991,36(4):22-23
In vitro activity of 13 antibiotics and drug preparations as well as some of their combinations was studied with respect to Brucella melitensis. It was shown that the strains of B. melitensis were sensitive to sisomicin, amikacin, gentamicin, cefotaxime, rifaprim +, nitroxoline and trimethoprim. Variations in the doxycycline sensitivity depending on the strain were observed. The strains of B. melitensis were resistant to cephalexin, phosphomycin, chinoxydine, dioxydine and oxolinic acid. Combinations of sisomicin and trimethoprim at a ratio of 1:10 and sisomicin and nitroxoline at a ratio of 1:2 had a summation effect. 相似文献
103.
104.
The lack of fossil tetrapod bearing deposits in the earliest Carboniferous (‘Romer’s Gap’) has provoked some recent discussions regarding the proximal cause, with three explanations being offered: environmental, taphonomic, and collection failure. One of the few, and earliest, windows into this time is the locality of Blue Beach exposed in the Tournaisian deposits at Horton Bluff lying along the Avon River near Hantsport, Nova Scotia, Canada. This locality has long been known but, because the fossils were deposited in high energy settings they are almost always disarticulated, so the fauna has not been described in detail. Recent intensive collection has revealed a diverse assemblage of material, including for the first time associated elements, which permits an evaluation of the faunal constituents at the locality. Although not diagnosable to a fine taxonomic level, sufficient apomorphies are present to identify representatives from numerous clades known from more complete specimens elsewhere. The evidence suggests a diverse fauna was present, including whatcheeriids and embolomeres. A single humerus previously had been attributed to a colosteid, but there is some uncertainty with this identification. Additional elements suggest the presence of taxa otherwise only known from the late Devonian. Depositional biases at the locality favor tetrapod fossils from larger individuals, but indirect evidence from trackways and tantalizing isolated bones evidences the presence of small taxa that remain to be discovered. The fossils from Blue Beach demonstrate that when windows into the fauna of ‘Romer’s Gap’ are found a rich diversity of tetrapods will be shown to be present, contra arguments that suggested this hiatus in the fossil record was due to extrinsic factors such as atmospheric oxygen levels. They also show that the early tetrapod fauna is not easily divisible into Devonian and Carboniferous faunas, suggesting that some tetrapods passed through the end Devonian extinction event unaffected. 相似文献
105.
Yevheniia Konotop Patrik Mészáros Nadine Spie? Veronika Mistríková Beáta Pir?elová Jana Libantová Jana Morav?íková Natalia Taran Pavol Hauptvogel Ildikó Matu?íková 《Molecular biology reports》2012,39(12):10077-10087
Heavy metal pollution is a serious environmental problem in agricultural soils since the uptake of heavy metals by plants represents an entry point into the food chain and is influenced by the form and amount of nitrogen (N) fertilization. Here we studied the defense responses in soybean roots exposed to ions of cadmium (applied as 50?mg?l?1 Cd2+) when combined with an excessive dose of N in form of NH4NO3. Our data indicate that despite of stunted root growth, several stress symptoms typically observed upon cadmium treatment, e.g. peroxidation of lipid membranes or activation of chitinase isoforms, become suppressed at highly excessive N. At the same time, other defense mechanisms such as catalases and proline accumulation were elevated. Most importantly, the interplay of ongoing responses resulted in a decreased uptake of the metal into the root tissue. This report points to the complexity of plant defense responses under conditions of heavy metal pollution combined with intensive fertilization in agriculture. 相似文献
106.
Y. Anbessa Bunyamin Taran T. D. Warkentin A. Tullu A. Vandenberg 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》2009,119(4):757-765
Ascochyta blight (AB) caused by Ascochyta rabiei (teleomorph, Didymella rabiei) Pass. Lab. is an important fungal disease of chickpea worldwide. Only moderate sources of resistance are available within
the cultivated species and we hypothesized that the available sources may carry different genes for resistance, which could
be pyramided to improve field resistance to AB. Four divergent moderately resistant cultivars CDC Frontier, CDC Luna, CDC
Corinne, and Amit were each crossed to a highly susceptible germplasm ICCV 96029. Parents, F1 and F2 generations were evaluated under controlled conditions for their reactions to AB. A total of 144 simple sequence repeat (SSR)
markers were first mapped to eight linkage groups (LG) for the CDC Frontier × ICCV 96029 population. Then based on the evidence
from this population, 76, 61, and 42 SSR markers were systematically chosen and mapped in CDC Luna, CDC Corinne, and Amit
populations, respectively. Frequency distributions of the AB rating in the F2 generation varied among the four populations. Composite interval mapping revealed five QTLs (QTL1–5), one on each of LG 2,
3, 4, 6, and 8, respectively, distributed across different sources, controlling resistance to AB. CDC Frontier contained QTL2,
3, and 4 that simultaneously accounted for 56% of phenotypic variations. CDC Luna contained QTL 1 and 3. CDC Corinne contained
QTL 3 and 5, while only QTL 2 was identified in Amit. Altogether these QTL explained 48, 38, and 14% of the estimated phenotypic
variations in CDC Luna, CDC Corinne, and Amit populations, respectively. The results suggested that these QTLs could be combined
into a single genotype to enhance field resistance to AB.
Y. Anbessa and B. Taran contributed equally to this work. 相似文献
107.
Har-Shai Y Karmeli R Saute M Mayblum S Taran A Barak A Loberman Z Naveh U Eyal A Schramek A 《Plastic and reconstructive surgery》2001,107(2):514-518
Successful reconstructive surgery with muscle flaps depends on adequate arterial supply and undisturbed venous drainage. Combining such surgery with reconstructive vascular surgery of a large-caliber vein that is responsible for the venous drainage of the flap poses an additional challenge--the repaired vein's susceptibility to thrombosis. Every attempt must be made to prevent venous outflow obstruction following muscle flap surgery. Data from the vascular surgery literature demonstrate a low success rate for subclavian vein repair. The success rate with venous reconstructive surgery has been greater when a distal arteriovenous fistula accompanied the repair. The present case described the use of a temporary distal cephalic-brachial arteriovenous fistula to maintain the patency of the venous drainage of a pedicled latissimus dorsi muscle flap, following subclavian vein repair, for one-stage coverage of a large chest wall defect. 相似文献
108.
Stability, sensitivity, science and heurism 总被引:1,自引:0,他引:1
Taran Grant Arnold G. Kluge 《Cladistics : the international journal of the Willi Hennig Society》2005,21(6):597-604
We examine recently proposed justifications of sensitivity analysis sensu Wheeler (1995 ), here referred to as weighted‐classes sensitivity analysis (WCSA). We refute Giribet's (2003a) claim that WCSA is the strictest possible test for a given phylogenetic hypothesis. Giribet's (2003a) classification of data exploration methods as evaluating “nodal stability” or “nodal support” is arbitrary, at odds with common usage and actually obscures the relationships between the methods he examined, all of which seek to assess the sensitivity of results to variation in analytical conditions. Stability, whether statistical or taxonomic, is not a goal of phylogenetic science. Statistical stability necessarily involves trial repetition, which is impossible in ideographic sciences like phylogenetics. Taxonomic stability can be nothing more than an unintended by‐product of scientific inquiry, i.e., the repeated failure to refute a hypothesis. Schulmeister's (2003 ) “robust‐choice” defense of WCSA does not succeed in placing non‐arbitrary bounds on parameters, and her interpretation of this approach as simultaneously verificationist and falsificationist is logically inconsistent. WCSA is neither scientific nor heuristic and therefore does not contribute to the advancement of objective knowledge claims. © The Willi Hennig Society 2005. 相似文献
109.
Ye. O. Konotop M. S. Kovalenko V. Z. Ulynets A. O. Meleshko L. M. Batsmanova N. Yu. Taran 《Cytology and Genetics》2014,48(2):99-102
Phytotoxicity of colloidal solutions of metal-containing nanoparticles (Ag, Cu, Fe, Zn, Mn) was investigated using a standard Allium cepa (L.) test system. Toxicity of experimental solutions at the organism level was evaluated in terms of biomass growth of onion roots, and cytotoxicity was estimated by proliferative activity of root meristem cells. The colloidal solutions of metal nanoparticles inhibited the growth of Allium cepa (L.) roots due to their ability to penetrate into cells and interact with their components and, thus, to inhibit mitosis. According to our results, cytotoxicity of test solutions decreases in the following order: Cu ≥ Zn ≥ Ag ≥ Fe. Solution of Mn-containing nanoparticles contributed to root growth reaction. 相似文献
110.
Ramyani Taran Murali Krishna Mamidi Gurbind Singh Susmita Dutta Ishwar S Parhar John P John Ramesh Bhonde Rajarshi Pal Anjan Kumar Das 《Journal of biosciences》2014,39(1):157-169
Regenerative medicine is an evolving interdisciplinary topic of research involving numerous technological methods that utilize stem cells to repair damaged tissues. Particularly, mesenchymal stem cells (MSCs) are a great tool in regenerative medicine because of their lack of tumorogenicity, immunogenicity and ability to perform immunomodulatory as well as anti-inflammatory functions. Numerous studies have investigated the role of MSCs in tissue repair and modulation of allogeneic immune responses. MSCs derived from different sources hold unique regenerative potential as they are self-renewing and can differentiate into chondrocytes, osteoblasts, adipocytes, cardiomyocytes, hepatocytes, endothelial and neuronal cells, among which neuronal-like cells have gained special interest. MSCs also have the ability to secrete multiple bioactive molecules capable of stimulating recovery of injured cells and inhibiting inflammation. In this review we focus on neural differentiation potential of MSCs isolated from different sources and how certain growth factors/small molecules can be used to derive neuronal phenotypes from MSCs. We also discuss the efficacy of MSCs when transplanted in vivo and how they can generate certain neurons and lead to relief or recovery of the diseased condition. Furthermore, we have tried to evaluate the appropriate merits of different sources of MSCs with respect to their propensity towards neurological differentiation as well as their effectiveness in preclinical studies. 相似文献