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111.
该文对桃蚜Myzus persicae(Sulzer)各型触角感器进行了比较研究。扫描电镜观察结果表明桃蚜具有钟形感器、毛形感器、原生感觉圈和次生感觉圈4种类型的触角感器。桃蚜各型触角感器的最大差异主要表现在次生感觉圈上,雄蚜、雌性母和有翅孤雌蚜具有次生感觉圈,雌性蚜、干母和无翅孤雌蚜无;但雄蚜具有的次生感觉圈数目多于雌性母和有翅孤雌蚜,且不仅仅分布在触角第3节,第4、5节也有分布。本文探讨了桃蚜触角感器在化学生态学上的功能作用,各型触角感器的差异与桃蚜寄主选择、迁移及交配行为的关系,并进一步分析了桃蚜触角感器的性二型现象。 相似文献
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Mosaics have been used in Drosophila to study development and to generate mutant structures when a mutant allele is homozygous lethal. New approaches of directed somatic recombination based on FRT/FLP methods, have increased mosaicism rates but likewise multiple clones in the same individual appeared more frequently. Production of single clones could be essential for developmental studies; however, for cell-autonomous gene function studies only the presence of homozygous cells for the target recessive allele is relevant. Herein, we report the number and extension of antennal mosaics generated by the MARCM system at different ages. This information is directed to obtain the appropriated mosaic type for the intended application. By applying heat shock at 10 different developmental stages from 0-12 h to 6-7 days after egg laying, more than 50% of mosaics were obtained from 5,028 adults. Single recombinant clones appeared mainly at early stages while massive recombinant areas were observed with late treatments. 相似文献
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Ken Izumori Yumiko Watanabe Shigeru Sugimoto 《Bioscience, biotechnology, and biochemistry》2013,77(6):1443-1446
The full-length cDNA sequence of a new pheromone-binding protein (AscrPBP2) was determined from a geometrid moth, Ascotis selenaria cretacea, which secreted a Type II sex pheromone, and an antiserum against its recombinant protein overexpressed in Escherichia coli was prepared. In addition to this antiserum against AscrPBP2, antibodies against AscrPBP1 and general odorant-binding proteins of Bombyx mori were used in Western blotting experiments to analyze the proteins in the antennae of several lepidopteran species secreting Type II sex pheromone components. 相似文献
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Elisabeth Sulger Nola McAloon Susan J. Bulova Joseph Sapp Sean O'Donnell 《Biological journal of the Linnean Society. Linnean Society of London》2014,113(2):415-422
Brain investment is evolutionarily constrained by high costs of neural tissue. Several ecological factors favour the evolution of increased brain investment; we predict reduced brain region investment will accompany the evolution of organismal or social parasitism when parasites rely on host behaviour and cognition to solve ecological problems. To test this idea we investigated whether brain region investments differed between obligate slave‐making Polyergus mexicanus ant workers and their Formica fusca slave workers. Polyergus workers perform little labour for their colonies; enslaved workers of Formica host species forage, excavate nests and tend the brood. We focused on the calyces of the mushroom bodies, central processing brain regions that are larger in social insect workers that perform complex tasks. As predicted we found lower relative investment in mushroom body calyx in P. mexicanus workers than in F. fusca workers; by contrast, enslaved and free F. fusca workers did not differ in mushroom body calyx volume. We then tested whether slave‐makers and hosts differed in brain investment among sensory modalities. Polyergus slave‐makers employ several unique classes of pheromones during raids, and eye size relative to head size was smaller in P. mexicanus workers than in F. fusca workers. The size of antennal brain tissues relative to visual tissues was greater in Polyergus, both in the peripheral sensory lobes and in the mushroom body calyx, suggesting greater relative investment in antennal processing by slave‐makers. © 2014 The Linnean Society of London, Biological Journal of the Linnean Society, 2014, 113 , 415–422. 相似文献
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Christian Lohr Eric Tucker Lynne A. Oland Leslie P. Tolbert 《Developmental neurobiology》2002,52(2):85-98
Changes in the intracellular Ca2+ concentration ([Ca2+]i) induced by depolarization have been measured in glial cells acutely isolated from antennal lobes of the moth Manduca sexta at different postembryonic developmental stages. Depolarization of the glial cell membrane was elicited by increasing the external K+ concentration from 4 to 25 mM. At midstage 5 and earlier stages, less than 20% of the cells responded to 25 mM K+ (1 min) with a transient increase in [Ca2+]i of approximately 40 nM. One day later, at late stage 5, 68% of the cells responded to 25 mM K+, the amplitude of the [Ca2+]i transients averaging 592 nM. At later stages, all cells responded to 25 mM K+ with [Ca2+]i transients with amplitudes not significantly different from those at late stage 5. In stage 6 glial cells isolated from deafferented antennal lobes, i.e., from antennal lobes chronically deprived of olfactory receptor axons, only 30% of the cells responded with [Ca2+]i transients. The amplitudes of these [Ca2+]i transients averaged 93 nM and were significantly smaller than those in normal stage 6 glial cells. [Ca2+]i transients were greatly reduced in Ca2+‐free, EGTA‐buffered saline, and in the presence of the Ca2+ channel blockers cadmium and verapamil. The results suggest that depolarization of the cell membrane induces Ca2+ influx through voltage‐activated Ca2+ channels into antennal lobe glial cells. The development of the depolarization‐induced Ca2+ transients is rapid between midstage 5 and stage 6, and depends on the presence of afferent axons from the olfactory receptor cells in the antenna. © 2002 Wiley Periodicals, Inc. J Neurobiol 52: 85–98, 2002 相似文献
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蚜虫触角感受器结构及功能研究进展 总被引:1,自引:0,他引:1
本文综述了蚜虫触角上感受器在形态和生理功能方面的研究进展;介绍了常用的触角感受器研究方法;文中对分布于蚜虫触角上的感受器种类进行了阐述,描述了各类感受器的外部形态特征,及其内部超微结构.此外,探讨了不同类型的感受器的生理功能,及其在分子水平上的化学感受接收的机制. 相似文献
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