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1.
Nasal mucociliary clearance was measured in both healthy subjects and patients with chronic sinusitis using saccharin granule technique. Nasal mucociliary transit time (ST) was significantly slower in the patients with chronic sinusitis compared with that in controls (p less than 0.005). Nasal mucus collected from each nasal cavity was used for in vitro bullfrog palate clearance studies and compared to the in vivo nasal ST. Mucociliary clearance rate (MTR) on frog palate was 12.5 +/- 2.5 mm/min in the mucus from control subjects, 6.1 +/- 1.5 mm/min in the mucus from the patients. The difference was statistically significant (p less than 0.005). The MTR on frog palate in the patients whose nasal ST was within normal range was significantly slower than that in controls (p less than 0.005), but not significantly different from that in the patients whose nasal ST was over the normal range. These results suggest that the nasal mucous properties which decreased the mucociliary clearance on frog palate did not contribute to the mucociliary clearance of the patients who had a normal one. No significant correlation existed between MTR on frog palate and nasal ST in both control and chronic sinusitis. In chronic sinusitis patients, decelerated nasal ST was recovered significantly by normal saline nebulization compared with the value before the nebulization (p less than 0.01). None of the significant change of ST was observed in control before and after the nebulization. 相似文献
2.
Histological studies on male sterility of hybrids between laboratory and wild mouse strains 总被引:1,自引:0,他引:1
Atsushi Yoshiki Kazuo Moriwaki Teruyo Sakakura Moriaki Kusakabe 《Development, growth & differentiation》1993,35(3):271-281
In this study the cellular mechanisms of male sterility in F1 hybrids (BNF1) between BALB/c and wild-derived M.MUS-NJL (NJL) was investigated. Cell proliferation and differentiation in the sterile testis were examined by bromodeoxyuridine-labeling and use of germ cell stage-specific antibodies. In BNF1 testes, spermatogonia actively proliferated with a seminiferous epithelial cycle, and were retained in the basal layer of the tubules. However, preleptotene, leptotene and zygotene spermatocytes moved to the adluminal region. Immunohistological data with germ cell stage-specific antibodies indicated the presence of few, if any, pachytene spermatocytes in BNF1 testes. Thus, spermatogenesis seemed to be blocked at the zygotene stage. For examination of germ cell-Sertoli cell interactions, testes of aggregation chimeras between BNF1 and C3H/HeN were analyzed immunohistologically with C3H-specific antibody. Results showed that spermatogenesis of C3H-germ cells was normal, even when these cells in contact with BNF1-Sertoli cells. Differentiation of BNF1-germ cells progressed from zygotene to pachytene stage spermatocytes when these cells were surrounded by C3H-Sertoli cells, but never proceeded beyond the pachytene stage. These observations suggest that at least two different cellular factors may be involved in spermatogenesis, one acting in the germ cells and the other mediated by Sertoli cells. Furthermore, mating experiments revealed that the degree of spermatogenesis varied in different F1 hybrids, and that the major sterility factor was closely linked to the T -locus on chromosome 17. 相似文献
3.
H. Yoshida Shigeyuki Fujita Tadahiko Iizuka Toshimichi Yoshida Teruyo Sakakura 《Histochemistry and cell biology》1997,107(6):479-484
The expression of tenascin (TN) in the temporomandibular joint (TMJ) disc and synovial membrane was examined in 18 human
TMJ samples from patients with internal derangement of the TMJ and ten control specimens by an immunohistological technique
using paraffin-embedded tissue and specific anti-human TN monoclonal antibody (RCB-1). The expression of TN was observed in
all 28 samples, but it was limited to the walls of blood vessels, the perineurium, and the surface of the TMJ disc. The expression
of TN was diffuse in the stroma of mildly hypertrophic synovial membranes and focal in the surface of severely hypertrophic
synovial membranes. The clinical symptoms of internal derangement of the TMJ are thought to be related to the degree of synovitis.
The present study demonstrates that TN is expressed specifically in the portion of the TMJ synovial membrane affected with
internal derangement.
Accepted: 17 December 1996 相似文献
4.
A Yoshiki M Hanazono S Oda N Wakasugi T Sakakura M Kusakabe 《Development (Cambridge, England)》1991,113(4):1293-1304
This study investigates the primary effect of the eye lens obsolescence (Elo) gene of the mouse. Morphological features of the Elo lens were defined as follows: (1) deficient elongation of lens fiber cells, (2) morphological abnormality of nuclei of lens fiber cells, (3) lack of eosinophilic granules in the central fiber cells and (4) rupture of lens capsule in the posterior region. We have immunohistologically examined, by means of an in vivo BrdU incorporation system, whether or not the Elo gene regulates cell proliferation during lens development. The lens fiber cells were morphologically abnormal in day 13 embryonic Elo lens. However, there were no significant differences in morphology or cell proliferation between normal and Elo lens epithelium until day 14 of gestation. After day 15, the total cell number in the Elo lens epithelium was significantly less than that in the normal, but the total numbers of S-phase cells in the two genotypes were not significantly different. The ratio of the total S-phase cell number to the total number of lens epithelial cells may be affected by the developmental stage, but not directly by the genotype. The genotype, however, may be having a direct influence at later ages because malformation of Elo lens fiber cells must cause reduction of the total number of lens epithelial cells in older embryos. Although, at 30 days old, Elo lens cells were externally extruded through the ruptured capsule into the vitreous cavity, BrdU-labelled lens epithelial cells were detectable. To investigate whether the Elo lens phenotype is determined by its own genotype or by its cellular environment, we produced aggregation chimeras between C3H-Elo/+(C/C) and BALB/c(c/c). Most lenses of BALB/c dominant chimeras were oval in shape without the ruptured lens capsule. However, they were opaque in the center and slightly smaller in size than normal. The lenses of C3H-Elo/+ dominant chimeras were morphologically similar to the Elo lens. Although normal nuclei were regularly arranged in the anterior region, Elo-type nuclei were located in the posterior region. Immunohistological staining by using anti-C3H strain-specific antibody demonstrated that the lens fiber cells with abnormal nuclei were derived only from C3H-Elo/+, not from BALB/c. These observations suggest that the primary effect of the Elo gene in the developing lens may be specific to the fiber cell differentiation rather than to the cell proliferation.(ABSTRACT TRUNCATED AT 400 WORDS) 相似文献
5.
Vasilyeva A. D. Ivanov V. S. Yurina L. V. Indeykina M. I. Bugrova A. E. Kononikhin A. S. Nikolaev E. N. Rosenfeld M. A. 《Doklady. Biochemistry and biophysics》2021,501(1):419-423
Doklady Biochemistry and Biophysics - Plasminogen is a zymogenic form of plasmin, an enzyme that plays a fundamental role in the dissolution of fibrin clots as well as in many other physiological... 相似文献
6.
Current ideas of plant mitochondrial genome organization are presented. Data on the size and structural organization of mtDNA, gene content, and peculiarities are summarized. Special emphasis is given to characteristic features of the mitochondrial genomes of land plants and photosynthetic algae that distinguish them from the mitochondrial genomes of other eukaryotes. The data published before the end of 2014 are reviewed. 相似文献
7.
Backbone resonance assignment for the outer membrane lipoprotein receptor LolB from Escherichia coli
Shingo Nakada Masayoshi Sakakura Hideo Takahashi Hajime Tokuda Ichio Shimada 《Biomolecular NMR assignments》2007,1(1):121-123
LolB, which is anchored to the outer membrane of Gram-negative bacteria, receives outer-membrane-directed lipoproteins from
LolA, and incorporates them into the outer membrane. We established backbone resonance assignments of 2H/13C/15N labeled LolB from Escherichia coli. 相似文献
8.
9.
Hisahiro Yoshida Shin-Ichi Nishikawa Hitoshi Okamura Teruyo Sakakura Moriaki Kusakabe 《Development, growth & differentiation》1993,35(2):209-220
In order to investigate the role of the c- kit oncogene in the melanoblast development, a rat monoclonal antibody (ACK2) against the mouse c-kit protein was used to localize cells expressing c-kit during fetal development. ACK2 was also injected directly into the amniotic cavity of mouse fetuses at successive developmental stages. After birth, the offspring were examined to determine the resulting coat color patterns. c-kit positive melanoblasts first appeared in dermis of fetuses at 11.5 days postcoitum (dpc). Subsequently, these cells increased in number and migrated dorsolaterally to the ventral region, and by 12.5 dpc some of them began to invade the epidermis. Treatment of fetuses by ACK2 microinjection appeared to affect the pigmentation in the coat, inducing a variety of spotting patterns in offspring, and the location of the spots was closely correlated with gestational stage. ACK2 injection of early fetuses produced major changes in coat color even though few c-kit positive cells were detectable in the dermal mesenchyme at the time of injection. Large spots were also induced when mid-stage fetuses with a only few c-kit positive cells in the dorsal region were injected. By contrast, except for spot formation in the center of ventral region, ACK2 injection did not appear to affect melanogenesis in late stage fetuses that had many c-kit positive cells. 相似文献
10.
Jun Moriya Masayoshi Sakakura Yuji Tokunaga R. Scott Prosser Ichio Shimada 《Biochimica et Biophysica Acta (BBA)/General Subjects》2009