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1.
Diversion colitis refers to the inflammatory changes that occur in the defunctioned segment of the large intesting following diversion of the faecal stream. We report the histological features in the defunctioned rectums from seven patients: one each with severe constipation and Behcet's disease, two with Crohn's disease with rectal sparing and three with ulcerative colitis. The appearances of diversion colitis in a previously normal rectum are compared with diversion colitis with superimposed inflammatory bowel disease. Lymphoid follicular hyperplasia was found in all cases. This was marked in patients with inflammatory bowel disease. with or without initial rectal involvement. Other changes comprised surface epithelial degeneration and ulceration, mucosal inflammation including crypt abscesses, and crypt branching. Inflammatory and crypt changes were mild, except in ulcerative colitis where changes were marked and resembled those of the proximal colon. Lymphoid hyperplasia is a distinctive feature in diversion colitis. The term follicular proctitis, previously used to indicate chronic ulcerative colitis exclusively, should be re-examined. 相似文献
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PRASAD N.; O'KANE K.P.J.; JOHNSTONE H.A.; WHEELDON N.M.; McMAHON A.D.; WEBB D.J.; MacDONOLD T.M. 《QJM : monthly journal of the Association of Physicians》1994,87(11):659-662
An insertion/deletion polymorphism in the angiotensin-convertingenzyme (ACE) gene accounts for approximately 50% of the variancein plasma ACE concentration: deletion homozygotes (DD) havethe highest, and insertion homozygotes (II) the lowest ACE concentrations.ACE is responsible for the generation of angiotensin II, whichis implicated in the development of left ventricular hypertrophy,an independent risk factor for morbidity and mortality in hypertension.The aim of this study was to investigate the contribution ofACE genotype to the development of left ventricular hypertrophyin patients with essential hypertension. Eighty-five patientswith essential hypertension underwent echocardiographic assessmentof left ventricular mass index (LVMI) and determination of ACEgenotype from leukocyte DNA by polymerase chain reaction. Therewas no significant difference in LVMI among the genotypes (II,ID, DD). Analysis of covariance modelled for LVMI showed a significantinteraction with systolic blood pressure (p = 0.036). but notdiastolic blood pressure (p = 0.453). The relationship betweenLVMI and systolic blood pressure was strongest in the deletionhomozygotes (p = 0.002, R2 = 0.47), and also present in theheterozygotes (p = 0.013, R2 = 0.40). No relationship was seenin the insertion homozygotes (p = 0.914, R2 = 0.23) These findingssuggest that the effect of blood pressure on LVMI in essentialhypertension is expressed only in the presence of the ACE genedeletion allele. 相似文献
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Objective To investigate the role of surfactant protein (SP) - A and SP - D in urinary tract infection mouse model, and evaluate the effects of SP-A and SP-D absence on urinary tract infection. Methods SP-A and SP-D double knockout (SP-A/D KO) mice were made. SP-A/D KO and wild-type (WT) C57BL/6 female mice were used for this study. The expression of SP-A and SP-D in kidney was detected by immunohistochemistry (IHC). The levels of p - p38 and p38 protein in kidneys were measured by Western blotting. Uropathogenic Escherichia coli or buffer was delivered into the bladder of female mice. At 24 and 48 h after inoculation, CFU of Escherichia coli in the kidney and urine of the treated and control mice were measured. Histological, cellular and molecular analysis were performed by several methods of H/E staining, IHC and Western blotting. The effects of SP-A and SP-D on bacterial growth were studied in vitro. Results SP-A and SP-D in kidney were located in the proximal tubules and collecting tubules. Compared with WT mice, infected SP - A/D KO mice with UPEC had higher CFU in kidneys and urine at 24 h and 48 h, increased inflammatory cells infiltration in kidneys(P<0.05). Compared with WT mice, SP - A/D KO mice had higher p38 MAPK phosphorylation levels in kidneys(P<0.05). Growth of Escherichia coli was greatly inhibited by both SP-A and SP-D(P<0.05). Conclusions Both SP-A and SP-D are expressed in kidney. SP-A and SP-D can attenuate UTI induced by UPEC which may be through inhibiting bacterial growth and modulating renal inflammation. 相似文献
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Benign tumours of the epididymis, which are very rare, are variously regarded as adenomas, mesotheliomas and lymphangiomas, but an alternative opinion considers them to be of Müllerian vestigial origin. Their malignant counterparts are extremely rare, and this case is probably the second authentic instance to be reported in the English literature. Complete excision of the mass with wide resection of the cord followed by prophylactic local deep X-ray therapy has provided total relief to the patient over the year which has elapsed since these measures were undertaken. 相似文献
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D.W. URRY T.L. TRAPANE S.A. WOOD J.T. WALKER R.D. HARRIS K.U. PRASAD 《Chemical biology & drug design》1983,22(2):164-175
The d ° Ala5 analog, (l · Val1-l · Pro2-Gly3-l · Val4-d · Ala5)n, of the polypentapeptide (PPP) of elastin is synthesized and characterized by a series of physical methods. Carbon-13 and proton nuclear magnetic resonance spectroscopies are used to verify purity and, by means of solvent dependence of peptide C -O chemical shift and of temperature dependence of peptide NH chemical shift, to establish by comparison with the PPP of elastin the presence and increased stability of the Type II Pro2-Gly3 β-turn. The temperature dependence of aggregation in water to form a viscoelastic phase called the coacervate is reported for several concentrations. Comparison of carbon-13 nuclear magnetic resonance spectra obtained under identical conditions for the coacervate states of the PPP of elastin and the d · Ala5 analog shows the effect of replacing the Gly5 residue by a d · Alas residue to be one of greatly restricting mobility of the polypeptide chain. Scanning electron micrographs, of the coacervate alone and of the coacervate cross-linked and compounded to a Dacron fabric before and after stress-strain studies, are reported which show the d · Ala5 PPP matrix to rupture during the stresses of drying and of stretching while wet. Thus, the effect of adding a methyl moiety to the Gly5 residue of the PPP of elastin is to decrease markedly the mobility of the polypeptide chain and to destroy elasticity. The results are presented as a test of the proposed librational entropy mechanism of elasticity of the PPP of elastin. 相似文献
8.
The coupling of Boc-Val-OH to either H-Pro-OBzl or H-Pro-Gly-Val-Gly-OBzl by the mixed anhydride method leads to the formation of a urethane by-product in yields of 40–60%. This side reaction can be suppressed by the addition of HOBt to the reaction mixture before the amino component is added. This results in a substantially increased yield of the desired peptide. 相似文献
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