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排序方式: 共有155条查询结果,搜索用时 15 毫秒
81.
A. El Ibrahimi A. Daoudi M. Shimi A. Elmrini F. Boutayeb 《Médecine et Chirurgie du Pied》2009,25(1):9-12
Subungual exostosis is an unusual, benign, osteocartilaginous tumor with a tendency to recurrence. The authors report a retrospective series of 15 cases of subungual exostosis of the big toe. There were nine male and six female patients, with a mean age of 18 years. A history of trauma or repetitive microtrauma was noted in 8 cases. Surgical treatment was performed using the most direct approach. The tumor was completely excised and the ungual apparatus was reconstructed. All patients were monitored without recurrence. 相似文献
82.
83.
Sinha RK Aggarwal Y Upadhyay PK Dwivedi A Keshri AK Das BN 《Annals of biomedical engineering》2008,36(5):839-851
The effects of chronic exposure (2 h daily for 21 days) of 1 kHz square wave-modulated 2450 MHz microwave radiation (non-thermal)
on sleep-EEG, open field behavior, and thyroid hormones (T3, T4, and TSH) have been analyzed in an animal model. Results revealed significant changes in these pathophysiological parameters
(p < 0.05 or better), except body temperature, grooming behavior, and TSH levels. The sleep-EEG power spectrum data for slow
wave sleep (SWS), rapid eye movement (REM) sleep, and awake (AWA) states in two experimental groups of rats (microwave exposed
and the control) were tested by an artificial neural network (ANN), containing 60 nodes in input layer, weighted from power
spectrum data from 0 to 30 Hz, 18 nodes in hidden layer and an output node. The target output values for this network were
determined with another five-layered neural network (with the structure of 6-14-1-14-6). The input and output of this network
was assigned with the six confirmed pathophysiological changes. The most important feature for chronic exposure of 2450 MHz
microwave exposure and for control subjects was extracted from the third layer single neuron and used as the target value
for the three-layered ANN. The network was found effective in recognizing the EEG power spectra with an average of 71.93%
for microwave exposure and 93.13% for control subjects, respectively. However, the lower percentage of pattern identification
agreement in the microwave-exposed group in comparison to the control group suggest only mild effects of microwave exposure
with this experimental setup. 相似文献
84.
L K Nathanson S Shimi A Cuschieri 《Journal of the Royal College of Surgeons of Edinburgh》1992,37(4):215-220
In a series of acute and chronic experiments conducted in young pigs during a 2-year period, we have evolved a quick knotting technique to start and end a suture line and developed a curved 'Endoski' needle to improve needle passage through the tissues. These have been employed in the construction of cholecystojejunal anastomoses using a semi-closed technique with a single layer (deep seromuscular) of continuous polyglactin sutures. In chronic experiments in pigs, patent well healed bilioenteric anastomoses, which conveyed bile satisfactorily after ligation of the common bile duct, distal to the cystic duct, were achieved. A virtual absence of adhesions in these animals was noted. 相似文献
85.
Abstract: In the 11‐residue long dark‐color‐inducing neurohormone (DCIN = [His7]‐corazonin), of locusts, from residue 2 to residue 11, one amino acid at each time was substituted by d ‐phenylalanine (d ‐Phe). The dark‐color‐inducing effect of these peptides was investigated in comparison with unaltered DCIN by a bioassay based on nymphs of a DCIN‐deficient albino mutant of the migratory locust, Locusta migratoria. Substitution of any single amino acid by d ‐Phe always reduced the activity, but did not abolish it completely. Maximum inactivation was obtained after substitution of Gln4, Ser6, or Trp9. The latter two residues are within the partial sequence ‐Ser‐Xxx‐Gly‐Trp‐ (Xxx = His in the DCIN) that seems to be important for the dark‐color‐inducing activity, as found also in another study (Insect Biochem. Mol. Biol. 32, 2002, 909). Gln4, however, is outside of this partial sequence. Minimal, although still considerable, inactivation occurred after substitution of Gly8, Phe3, or Asn11, despite the fact that Gly8 is within the ‐Ser‐Xxx‐Gly‐Trp‐ partial sequence. In conclusion, no single active core was found, indicating that the whole sequence of the DCIN is necessary to induce maximum darkening effect. No difference was found in the activity of the peptides in which Gly8 was substituted by d ‐Phe or by l ‐Phe. Therefore the ‐Ser‐Xxx‐Gly‐Trp‐ partial sequence does not seem to be stabilized by a type II β‐turn. Nevertheless, existence of another kind of turn that includes this partial sequence is feasible. A single unsuccessful attempt was made to discover an antagonist to the DCIN. 相似文献
86.
87.
Modulation of interactions between activated GPCRs (G-protein coupled receptors) and the intracellular (IC) signal transducers, heterotrimeric G-proteins, is an attractive, yet essentially unexplored, paradigm for treatment of certain diseases. Regulating downstream signaling for treatment of congenital diseases due to constitutively active GPCRs, as well as tumors where GPCRs are often overexpressed, requires the development of new methodologies. Modeling, experimental data, docking, scoring, and experimental testing (MEDSET) was developed to discover inhibitors that target the IC loops of activated GPCRs. As proof-of-concept, MEDSET developed and utilized a model of the interface between photoactivated rhodopsin (R*) and transducin (Gt), its G-protein. A National Cancer Institute (NCI) compound library was screened to identify compounds that bound at the interface between R* and its G-protein. High-scoring compounds from this virtual screen were obtained and tested experimentally for their ability to stabilize R* and prevent Gt from binding to R*. Several compounds that modulate signal transduction have been identified. 相似文献
88.
Kanoun ML Chebil M Ben Maitig M Ayadi H Haddad N Shimi N Khorbi A Hachem A 《La Tunisie médicale》2007,85(7):586-590
BACKGROUND: Unicondylar femoral fractures are rare. They form a particular entity of the femoral lower extremity fractures. THE PURPOSE of this work was to evaluate the anatomical and functional results of unicondylar femoral fractures on pain, mobility, walking and stability of the knee. METHODS: We reviewed, retrospectively, 28 patients presenting unicondylar femoral fracture. There were 19 men and 9 women, with average age of 54 years (22 - 87 years), victims essentially of domestic accident. The fracture was alone in 65 % of cases. According to Nordin's classification, the fracture was of type I in 3% of cases, type II in 35 % of cases, type III in 20 % of cases and type IV in 42 % of cases. Twenty five patients had a surgical treatment after a median period of 7 days post-accident, 3 patients were treated orthopedically. RESULTS: After 3 years follow up, results were noted according to MEGY's score which takes into account walking, mobility, pain and the stability. Clinically, we noted 26 good and very good results and 2 moderate results. Anatomically, we obtained 75 % of satisfactory reductions. CONCLUSION: Unicondylar femoral fractures remain rare. It is important to recognize them and to make the exact diagnosis of their type. Surgical treatment exposes old subjects to risk of dismantling anatomical osteosynthesis because of osteoporoses. 相似文献
89.
Di Giorgio C Shimi K Boyer G Delmas F Galy JP 《European journal of medicinal chemistry》2007,42(10):1277-1284
Two new series of diaminoacridinic derivatives obtained from proflavine and N-(6-amino-3-acridinyl)acetamide were synthesised and assessed for their cytotoxic and antileishmanial activities. Two compounds, N-[6-(acetylamino)-3-acridinyl]acetamide and N-[6-(benzoylamino)-3-acridinyl]benzamide demonstrated highly specific antileishmanial properties against the intracellular amastigote form of the parasite. Structure-activity relationships established that the antiproliferative activity against human cells was greatly enhanced by the presence of a benzoylamino group in 6-mono-substituted acridines, while the presence of two acetylamino or benzoylamino groups in 3,6-di-substituted acridines strongly increased the specificity of the molecules for Leishmania parasite, suggesting that symmetric conformations could preferentially interfere with Leishmania metabolism. 相似文献
90.
4,4′-Isopropylidine-Bis[2-Isopropyl]Phenol,a New Inhibitor for Cell Wall Formation of Bacillus subtilis 下载免费PDF全文
4,4′-Isopropylidine-bis[2-isopropyl]phenol was found to possess antimicrobial activity against gram-positive bacteria and some fungi, whereas it had no effect on gram-negative organisms. The drug has a potent inhibitory action on the synthesis of cell wall mucopeptides of Bacillus subtilis by inhibiting the enzyme d-glutamate ligase, which is responsible for the incorporation of d-glutamic acid into uridine 5′-diphosphate-muramyl-l-alanine. The drug had a weak lytic effect on protoplasts and inhibited protein synthesis, whereas no significant effect on the synthesis of deoxyribonucleic acid and ribonucleic acid was found. 相似文献