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91.
Ichiro Tamaki Katsushige Nomura Reiko Nomura Chieko Tate Chikara Watanabe Yoshihiro Miyakami Yumiko Yabe 《Landscape and Ecological Engineering》2018,14(2):269-276
Magnolia stellata is a rare subcanopy tree species that grows in secondary forests in warm temperate zones. It is now endangered due to habitat degradation by vegetation succession. In an attempt to improve the habitat, a 30 m?×?10 m plot (0.03 ha) was set up with all vegetation including M. stellata being clear-cut in January 2012. The number of sprouts increased for 1–2 years after clear-cutting and then gradually decreased or remained constant. Five years after clear-cutting, the numbers of individuals and stems, and the total basal area (BA), were 87.0, 165.5 and 3.2%, respectively, of the values before clear-cutting. BA was highest for Ilex pedunculosa, followed by M. stellata and Hydrangea paniculata. Some sprouted individuals of M. stellata produced flower buds in the second year after clear-cutting, and flowered and fruited in the spring and summer of the third year, respectively. The densities of potential canopy species were 18,533 ha?1 (height >?0.5 m) and 7,267 ha?1 (height >?1.2 m), vastly exceeding the value of the criterion for successful natural regeneration after clear-cutting of warm temperate forests in the region (3,000 ha?1). Based on this criterion, it is thus considered that the natural regeneration has reached completion. However, 45.1% (height >?0.5 m) and 95.5% (height >?1.2 m) of M. stellata individuals were regenerated by sprouting. Further research is needed into how individuals, regenerated from seedlings, develop and reach sexual maturity, and how successive generations change. 相似文献
92.
HKR1 encodes a cell surface protein that regulates both cell wall beta-glucan synthesis and budding pattern in the yeast Saccharomyces cerevisiae. 总被引:3,自引:1,他引:2
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T Yabe T Yamada-Okabe S Kasahara Y Furuichi T Nakajima E Ichishima M Arisawa H Yamada-Okabe 《Journal of bacteriology》1996,178(2):477-483
We previously isolated the Saccharomyces cerevisiae HKR1 gene that confers on S. cerevisiae cells resistance to HM-1 killer toxin secreted by Hansenula mrakii (S. Kasahara, H. Yamada, T. Mio, Y. Shiratori, C. Miyamoto, T. Yabe, T. Nakajima, E. Ichishima, and Y. Furuichi, J. Bacteriol. 176:1488-1499, 1994). HKR1 encodes a type 1 membrane protein that contains a calcium-binding consensus sequence (EF hand motif) in the cytoplasmic domain. Although the null mutation of HKR1 is lethal, disruption of the 3' part of the coding region, which would result in deletion of the cytoplasmic domain of Hkr1p, did not affect the viability of yeast cells. This partial disruption of HKR1 significantly reduced beta-1,3-glucan synthase activity and the amount of beta-1,3-glucan in the cell wall and altered the axial budding pattern of haploid cells. Neither chitin synthase activity nor chitin content was significantly affected in the cells harboring the partially disrupted HKR1 allele. Immunofluorescence microscopy with an antibody raised against Hkr1p expressed in Escherichia coli revealed that Hkr1p was predominantly localized on the cell surface. The cell surface localization of Hkr1p required the N-terminal signal sequence because the C-terminal half of Hkr1p was detected uniformly in the cells. These results demonstrate that HKR1 encodes a cell surface protein that regulates both cell wall beta-glucan synthesis and budding pattern and suggest that bud site assembly is somehow related to beta-glucan synthesis in S. cerevisiae. 相似文献
93.
A new species of sculpin,Icelus ecornis (Scorpaeniformes: Cottidae) from the southwestern Okhotsk Sea 总被引:1,自引:1,他引:0
A new cottid species,Icelus ecornis, is described on the basis of 31 specimens collected from 159–226 m in the southwestern Okhotsk Sea off Hokkaido, Japan.
It is distinguished from all other members of the genusIcelus by the following combination of characters: no supraocular and parietal spines; short blunt nuchal spine; cirri absent from
head and body, except for supraocular, parietal and nuchal regions; platelike scales of dorsal row bearing 6–10 long uniform
spinules; tubular lateral line scales bearing small spines on dorsal and posterior margins; large oval black spot on first
dorsal fin; 16–20 anal fin rays. 相似文献
94.
Juvenile development ofSuggrundus meerdervoortii was described, based on twelve specimens (12.9–43.8 mm SL) collected from off Yamagata Prefecture, Japan Sea. Two exterior
openings in the lateral line scales were completed at ca. 35 mm SL, with the interopercular flap and iris lappet being visible
at ca. 44 mm SL, these all being useful taxonomic characters. In juveniles and additional young and adult specimens (ca. 70–191
mm SL), the proportions of head length, snout length, orbital diameter, caudal peduncle depth and caudal fin length decreased
with growth; interorbital width decreased rapidly until ca. 70 mm SL, but more or less stabilised thereafter (70–191 mm SL). 相似文献
95.
Hattan Jun-ichiro Shindo Kazutoshi Ito Tomoko Shibuya Yurica Watanabe Arisa Tagaki Chie Ohno Fumina Sasaki Tetsuya Ishii Jun Kondo Akihiko Misawa Norihiko 《Planta》2016,243(4):959-972
Planta - A novel terpene synthase ( Tps ) gene isolated from Camellia brevistyla was identified as hedycaryol synthase, which was shown to be expressed specifically in flowers. Camellia plants are... 相似文献
96.
97.
Subgroups of type A blood, named A1, A2, and A1-A2 intermediate (Aint), are specifically characterized by their peculiar A alleles and have their own A1-, A2- or Aint-forms of alpha-N-acetyl-D-galactosaminyltransferase (A-transferase). It is known, however, that certain type A2B persons exhibit A1-transferase. The reason may be an unusual alpha-galactosyltransferase (B-transferase). This strong B-transferase competes with A-transferase for the substrate, H antigen, so as to decrease the A and H antigens on the red cells. We studied this blood group over three generations and found that the strong B-transferase is, in fact, inherited with the B gene and is dominant over normal B-transferase. In AB blood groups in Tokyo, the frequency of people with a strong B-transferase is 5% for A1B and 22% for A2B. This enzyme does not always cause weak H or A antigens. 相似文献
98.
Noritsugu Yabe Miwa Kato Yutaka Matsuya Isao Yamane Muneaki Iizuka Hiroyuki Takayoshi Kiyokazu Suzuki 《In vitro cellular & developmental biology. Plant》1987,23(12):815-820
Summary The role of various iron chelators on the multiplication of mouse hybridoma cells in an albumin-free, transferrin-deficient
defined medium was investigated. Fe(III)-dihydroxyethylglycine, Fe(III)-glycylglycine, Fe(III)-ethylenediamine-N,N′-dipropionic acid, or Fe(III)-iminodiacetic acid supported the excellent growth of the cells. In addition, the growth of the
iron-starved cells, which had been preincubated in a protein-, iron- and chelator-free defined medium, restored rapidly when
the medium was supplemented with holotransfeerrin, ferric iron, and chelator compared to that when supplemented with holotransferin,
but without iron and chelator. The results suggest that such chelators modulate a progression of transferrn cycle in the presence
of transferin and ferric iron. An alternative explantation is that there is a decrease in generation of iron-catalyzed free
radicals. 相似文献
99.
100.
S Honjo F Cho T Fujiwara Y Yoshioka K Masuko K Kurihara M Yabe Y Noguchi 《Japanese journal of medical science & biology》1978,31(3):301-310
Vital statistics on the breeding through successive generations were presented for the cynomolgus monkey colony of NIH, Tokyo. The results of this retrospective survey clearly demonstrated the third (F2) and the fourth (F3) generations could be bred and reared successfully by the indoor caged-breeding system in which either individual timed-mating or group mating procedure was adopted. Several important and difficult problems involved in the production of successive generations of the cynomolgus monkey by our breeding system were discussed from the standpoint of laboratory animal science. 相似文献