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191.
Dyspessa peri sp. n. (Lepidoptera: Cossidae) is described from Sarobi in Central Afghanistan. The new species is closely related to D. tristis A. Bang-Haas, 1912, and is distinguished by peculiarities of the wing pattern and structure of the male genitalia.
http://www.zoobank.org/urn:lsid:zoobank.org:pub:D58AAAC5-90F2-4D06-9DB2-C4D3CDE36265 相似文献
192.
Yamouna Makhlouf Ahmed Nedjari Anissa Dahoumane Elise Nardin Martina Nohejlová Bertrand Lefebvre 《Annales de Paléontologie》2018,104(4):301-307
Several specimens of the genus Ascocystites (Blastozoa, Eocrinoidea) are described for the first time in Late Ordovician deposits (Bou M’Haoud Formation) from the Ougarta Range, Algeria. This genus was previously known in Darriwilian–Sandbian deposits of four other areas of the Mediterranean Province (Czech Republic, France, Morocco and Portugal). The Algerian material completes its palaeobiogeographic distribution in the peri-Gondwanan area, restricted in shallow water settings. 相似文献
193.
Development of a diagnostic system for detection of specific antibodies and antigens against Middle East respiratory syndrome coronavirus
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Kunse Lee Hae Li Ko Eun‐Young Lee Hyo‐Jung Park Young Seok Kim Yeon‐Sook Kim Nam‐Hyuk Cho Man‐Seong Park Sang‐Myeong Lee Jihye Kim Hun Kim Baik Lin Seong Jae‐Hwan Nam 《Microbiology and immunology》2018,62(9):574-584
194.
M. B. Jørgensen M. Kanneworff 《Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology》1997,182(1):59-64
The anuran middle ear serves to transmit eardrum vibrations to the inner ear. In order to do this efficiently, the eardrum
and middle ear must operate as an impedance transformer matching the low impedance of air to the higher impedance of the fluid-filled
inner ear. In amniotes, one of the mechanisms used to achieve impedance transformation is to have the middle ear work as a
force-amplifying lever system. Here, we present evidence that the grass frog middle ear also implements a lever system. The
columellar footplate, which sits in the oval window, is firmly connected to the otic capsule along its ventral edge. Therefore,
simple in-out movement of the columella is prevented while a rotational movement around the footplate's ventral edge is possible.
The latter movement pattern was confirmed by laser vibrometry measurements of eardrum and footplate vibrations. The results
showed that the footplate vibrations were 20–30 dB weaker than those of the eardrum and that the two structures vibrated 180°
out of phase (at low frequencies). The lever ratio was approximately 6, i.e. somewhat higher than lever ratios reported for
amniotes. Hence, the middle ear lever probably makes a significant contribution to impedance matching in frogs.
Accepted: 1 July 1997 相似文献
195.
Leaf anatomy was studied by light and electron microscopy and the leaf activities of RUBP carboxylase, PEP carboxylase, and malic enzyme were assayed in: Salsola australis and S. oreophila grown on the West Pamirs at 1800 m altitude; in S. australis grown on the East Pamirs at 3860 m; and in S. arbusculiformis grown in the Kisil-Kum desert in Middle Asia near 500 m. Carbon isotope fractionation ratio values also were measured on whole leaf tissue for 18 Salsola species field collected in these and other regions of the former USSR. S. australis leaves are cylindrical and in cross section exhibit a peripheral ring of mesophyll and then an inner ring of bundle sheath type cells; and its biochemical characteristics and deltaC values are typical of a C4 species of the NADP-malic enzyme malate-forming group. These traits were expressed independent of the plant growth altitude up to 4000 m. C4 type deltaC values were obtained in 14 of the Salsola species. Anatomical, structural, and biochemical features typical of the C4 syndrome were absent in S. oreophila and S. arbusculiformis. Four Salsola species, including these two, had C3-type deltaC values. Their cylindrical leaves in cross section exhibited two to three peripheral rings as layers of palisade parenchyma. Although their vascular bundles were surrounded by green bundle sheath cells, their organelle numbers were comparable to those in mesophyll cells. Neither bundle sheath cell wall thickenings nor dimorphic chloroplasts in two leaf cell types were observed. In S. oreophila, there was a high activity of RuBP carboxylase, but a low activity of C4 cycle enzymes. Interpretation of these data lends evidence to the hypothesis that a small group of C3 Salsola species, including S. oreophila, S. arbusculiformis, S. montana, and S. pachyphylla, arose as the result of a reversion of a C4 to a C3 type of photosynthetic CO2 fixation in the cooler climates of Middle Asia. 相似文献
196.
Al-Qaeda and Taliban leadership and membership appear to have been motivated, inspired, and guided by certain dreams. Their understanding of dreams seems to draw at least partly on traditional and contemporary Islamic dream theories. If this hypothesis is correct, then there is a need for the urgent study of Islamic Jihadist political/religious conversion and guidance dreams across the Middle East. The dream-as experienced, reported, and interpreted-is now a significant aspect of the global conflict between Al-Qaeda and its associates versus the core value system of Western civilization. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
197.
河南内乡晚奥陶世石燕河组牙形石及其地质意义 总被引:3,自引:0,他引:3
将河南内乡晚奥陶世石燕河组牙形石自下而上建立了Oulodusuirichi-Aphelognathusshoshonensis带,Onodusrobustus带,Aphelognathusgrandis带,Aphelognathusdivergens带和Aphelognathuszuoquensis带。这个序列与北美中大陆的很相似,两者可详细对比。充分证实了北美中大陆型牙形石动物群以及中国合此类型牙形石的最高奥陶纪地层在华北地台以南的武当地块北缘的存在,并指明了其古生物地理分区和构造意义。 相似文献
198.
199.
Jason Sumich 《Ethnos》2016,81(5):821-841
In this essay, I examine the moral basis of a ‘middle class’ in Maputo, Mozambique, the narratives, forms of dependence and types of hegemony that the social hierarchy rests upon. I argue that the political and economic processes that have given rise to ‘new’ middle classes in the global south also create conditions of precariousness. In recent years, it has been argued that these ‘emerging middle classes’ are central for economic growth and the safeguarding of a stable, liberal order. The case of Mozambique complicates this assertion and demonstrates an occurrence now taking place across the globe. When the relationships of dependence and obligation and the narratives that justify them erode, the structures of power that may have once been mutually constitutive between an emerging middle class and the state can become damaging as the system they once upheld loses its legitimacy. 相似文献
200.
《Geobios》2016,49(5):349-354
87Sr/86Sr values from otoliths of the worldwide-distributed fish Hygophum hygomii are used for the purpose of isotope chemostratigraphy. In order to evaluate the potential of H. hygomii otoliths for strontium (Sr) isotopic studies, we first compare the 87Sr/86Sr ratio of current representatives of the species with that of modern sea water. Then, three fossil otoliths of H. hygomii collected in middle Miocene sediments of the Aquitaine Basin (Lafaurie locality, SW France) and the Carpathian Foredeep of the Central Paratethys (Brno-Kralovo Pole locality, SE Czech Republic) are analysed. The age inferred from the 87Sr/86Sr ratio at Lafaurie places the two analysed otoliths within the time interval of 15.5–15.1 Ma. This time interval matches the published early Langhian age obtained from the 87Sr/86Sr ratio of bivalves measured at the same locality. At the Brno-Kralovo Pole, the 87Sr/86Sr ratio of the analysed otolith returns a wider timespan of 14.78–13.10 Ma, falling into an interval of poor time resolution of the 87Sr/86Sr chemostratigraphy. Comparisons with published biostratigraphic and paleoclimatic data suggest that the analysed fossil otoliths of H. hygomii were mineralized during the late part of the Langhian, at ∼14.2 Ma. This work represents a first attempt to use otoliths for 87Sr/86Sr chemostratigraphy, and indicates that such a use may represent a powerful tool for testing stratigraphic correlations in the future. 相似文献