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Eva Ludvigsen Carina Carlsson Eva Tiensuu Janson Stellan Sandler Mats Stridsberg 《Upsala journal of medical sciences》2015,120(3):157-168
Background
Somatostatin acts through five receptor subtypes (SSTRs 1–5). We aimed to investigate SSTRs mRNA expression and protein distribution in whole rat embryos, with special emphasis on the pancreas.Material and methods
Rat embryos were collected on embryonal days 10, 11, 12, 14, 15, 17, 19, 21, and at birth. Presence of SSTRs was investigated with RT-PCR techniques and immunohistochemistry.Results
There was no SSTR5 mRNA expression in the whole rat embryos. All SSTR1–5 proteins were observed at embryonal day 10, but the localization varied between the different subtypes. From day 11 to birth SSTRs protein presence increased with time in major structures such as skin and cartilage. It remained similar over time in the heart and liver. In the fetal pancreas mRNA expression of SSTR2 and 4 was detected at day 14, and there was an increase up to birth. Only SSTR1 protein co-localized to a higher extent with the islet hormones studied. SSTR2 was present in all islet endocrine cells except for β-cells. In contrast, the immunostaining for SSTR3–4 was co-localized with insulin and PP, and, finally, SSTR5 with glucagon and pancreatic polypeptide. In mRNA isolated from whole rat embryos SSTR1-2 and SSTR4 expression showed a peak at day 14, while SSTR3 mRNA was not present until day 15.Conclusion
The present data suggest a role for SSTRs during the development of the rat embryo. Subsequent functional studies may elucidate regulatory roles of specific SSTRs for the growth and differentiation of the pancreas as well as other organs. 相似文献3.
Bjartling C Osser S Persson K 《European journal of obstetrics, gynecology, and reproductive biology》2007,134(1):95-100
OBJECTIVES: The role of persistent chlamydial infection of the Fallopian tubes in ectopic pregnancy is still unresolved. Therefore, we examined tissue of the Fallopian tubes from patients with ectopic pregnancy for the presence of Chlamydia trachomatis. In addition, other markers of C. trachomatis infection implicated in the pathogenesis of tubal damage were studied including antibodies to heat shock protein 60 of chlamydial and human origin. STUDY DESIGN: Fresh frozen tubal tissue from 55 patients with ectopic pregnancy in a hospital setting were examined for the presence of C. trachomatis DNA by polymerase chain reaction (PCR) and blood sample were analysed for antibodies to C. trachomatis including heat shock protein 60 (hsp60). RESULTS: Chlamydial DNA was not detected in any of the 55 tubal specimens using a commercial test, Cobas Amplicor, Roche, and an in-house real time PCR able to detect a few copies of the organism. Logistic regression showed that chlamydial IgG antibodies were more common in a subgroup of patients with previous PID than in controls (OR=7.84, CI 1.78-34.6). Specific antibodies to hsp60 of chlamydial (OR=7.00, CI 1.50-32.6) but not of human origin (OR=2.13, CI 0.14-31.6) were associated with ectopic pregnancy in this group. CONCLUSIONS: No evidence of persistent infection of C. trachomatis in the fallopian tubes at the time of ectopic pregnancy was found in this study. 相似文献
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Markus V. Björkström Lina Hall Stina Söderlund Eva Grahn Håkansson Stellan Håkansson Magnus Domellöf 《Acta paediatrica (Oslo, Norway : 1992)》2009,98(11):1762-1767
Aim: To study the early faecal microbiota in very low-birth weight infants (VLBW, <1500 g), possible associations between faecal microbiota and faecal calprotectin (f-calprotectin) and to describe the faecal microbiota in cases with necrotizing enterocolitis (NEC) before diagnosis.
Methods: Stool samples from the first weeks of life were analysed in 48 VLBW infants. Bacterial cultures were performed and f-calprotectin concentrations were measured. In three NEC cases, cultures were performed on stool samples obtained before diagnosis.
Results: Bifidobacteria and lactobacilli were often identified in the first stool sample, 55% and 71% of cases, respectively within the first week of life. A positive correlation between lactic acid bacteria (LAB) and volume of enteral feed was found. Other bacteria often identified were Escherichia coli , Enterococcus and Staphyloccus sp. F-calprotectin was not associated with any bacterial species. All NEC cases had an early colonization of LAB. Prior to onset of disease, all cases had a high colonization of non- E. coli Gram-negative species.
Conclusion: In contrast to the previous studies in VLBW infants, we found an early colonization with LAB. We speculate that this may be due to early feeding of non-pasteurized breast milk. 相似文献
Methods: Stool samples from the first weeks of life were analysed in 48 VLBW infants. Bacterial cultures were performed and f-calprotectin concentrations were measured. In three NEC cases, cultures were performed on stool samples obtained before diagnosis.
Results: Bifidobacteria and lactobacilli were often identified in the first stool sample, 55% and 71% of cases, respectively within the first week of life. A positive correlation between lactic acid bacteria (LAB) and volume of enteral feed was found. Other bacteria often identified were Escherichia coli , Enterococcus and Staphyloccus sp. F-calprotectin was not associated with any bacterial species. All NEC cases had an early colonization of LAB. Prior to onset of disease, all cases had a high colonization of non- E. coli Gram-negative species.
Conclusion: In contrast to the previous studies in VLBW infants, we found an early colonization with LAB. We speculate that this may be due to early feeding of non-pasteurized breast milk. 相似文献
6.
Delaney Hines Neena Modi Shoo K. Lee Tetsuya Isayama Gunnar Sj?rs Luigi Gagliardi Liisa Lehtonen Maximo Vento Satoshi Kusuda Dirk Bassler Rintaro Mori Brian Reichman Stellan H?kansson Brian A. Darlow Mark Adams Franca Rusconi Laura San Feliciano Kei Lui Naho Morisaki Natasha Musrap Prakesh S. Shah the International Network for Evaluating Outcomes of Neonates 《Acta paediatrica (Oslo, Norway : 1992)》2017,106(3):366-374
7.
Bock KW Bock-Hennig BS Münzel PA Brandenburg JO Köhle CT Soars MG Riley RJ Burchell B von Richter O Eichelbaum MF Swedmark S Orzechowski A 《Biochemical pharmacology》2002,63(9):1683-1690
UDP-glucuronosyltransferases (UGTs) are regulated in a species- and tissue-dependent manner by endogenous and environmental factors. The present study was undertaken to further our knowledge about regulation of UGTs in dogs, a species widely used in preclinical safety evaluation. beta-Naphthoflavone (BNF) was selected as a known aryl hydrocarbon receptor agonist and antioxidant-type inducer. The latter group of inducers is intensively investigated as dietary chemoprotectants against colon cancer. Dog UGTs were investigated in comparison with related human UGTs by examples, (i) expression of dog UGT1A6, the first sequenced dog phenol UGT, and (ii) morphine UGT activities, responsible for intestinal and hepatic first-pass metabolism of morphine. The following results were obtained: (i) dog UGT1A6 was found to be constitutively expressed in liver and marginally increased by BNF treatment. Expression was low in small intestine but ca. 6-fold higher in colon than for example in jejunum. Conjugation of 4-methylumbelliferone, one of the substrates of dog UGT1A6, was also enhanced 7-fold in colonic compared to jejunal microsomes. (ii) Compared to the corresponding human tissues, canine 3-O- and 6-O-morphine UGT activities were found to be >10-fold higher in dog liver and ca. 10-fold lower in small intestinal microsomes. Small intestinal morphine and 4-hydroxybiphenyl UGT activities appeared to be moderately (2- to 3-fold) induced by oral treatment with BNF. (iii) In contrast to dogs, morphine UGT activities were found to be similar in homogenates from human enterocytes and liver. The results suggest marked differences in tissue-specific regulation of canine vs. human hepatic and intestinal phenol or morphine UGTs. 相似文献
8.
The effect of ventilation on airborne contamination was studied in a new operating suite containing operating rooms with conventional ventilation (17-20 turnovers/h) and operating rooms with zonal ventilation, where the turnover in the central part of the room was ~ 80/h. The efficacy of the ventilation was first examined with gas tracer experiments and found satisfactory. Experiments using potassium iodide particles showed the transfer between adjacent rooms in the suite to be less than 10-3% with closed doors and from 1% to 2·5 × 10-2% when the doors were opened once a minute. The transfer between two adjacent operating rooms was calculated to be ~ 10-4%. There is thus little risk of spread of airborne infection between operating rooms. 相似文献
9.
Lindqvist P Waldenström A Henein M Mörner S Kazzam E 《Echocardiography (Mount Kisco, N.Y.)》2005,22(4):305-314
The aim of the present study was to describe regional and global right ventricular (RV) function in a wide age range of healthy subjects of both sexes. We studied 255 (125 females) healthy individuals randomly selected from the Umeå General Population Register, age 58 ± 19 (range 22–89) years. RV function was studied using myocardial tissue Doppler imaging of the RV free wall. Isovolumic contraction (IVCv), systolic (Sv), early (Ev), and late (Av) diastolic velocities were measured. Furthermore, isovolumic periods and ejection time intervals were also measured. Conventional Doppler was used to study RV global filling properties. While systolic myocardial velocities were conserved over age, there was a decrease in myocardial E/A ratio with increasing age (r =?0.67, P < 0.001, for base) taken from the RV free wall. A similar age relation was found in RV global filling velocities with a reduced tricuspid E/A ratio (r =?0.57, P < 0.001). Furthermore, a significant correlation was found between global and regional E/A ratios at the basal (r = 0.58, P ≤ 0.001) and mid‐segmental levels (r = 0.46, P ≤ 0.001). Systolic myocardial velocities behaved independent of age whereas regional as well as global E/A ratio were age‐related. No relationship was found between regional isovolumic time intervals and age. Knowledge of these age‐dependent relationships is fundamental when evaluating RV function in patients. 相似文献
10.