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排序方式: 共有356条查询结果,搜索用时 15 毫秒
71.
头皮糠疹是常见病是多发病,临床表现为头皮红斑和脱屑,提示皮损部位表皮结构和功能异常,头皮角质层代谢紊乱,最近对头皮糠疹病因和病理的研究证实马拉色菌,皮脂分泌和个体敏感性是形成上述皮损的3个关键因素,硫氧吡啶锌(PTZ或ZPT)可以有效地杀灭马拉色菌,PTZ的颗粒大小和形状对其在头皮的生物利用度有明显的影响。此外,PTZ的抗菌效果有赖于其分子结构的完整性,在外用制剂中加入附加的游离锌,可以有效防止PTZ解离,从而提高其疗效。 相似文献
72.
PJ Garry ; DJ VanderJagt ; SJ Wayne ; KH Koehler ; RL Rhyne ; TL Simon 《Transfusion》1991,31(8):686-692
Iron stores were observed in 57 healthy elderly volunteers, between 63 and 77 years of age, who donated 5 units of blood over approximately 1 year. An equal number of nondonors who contributed approximately 7 mL of blood at each visit for iron status measurements only were seen at the same frequency as the donor population. At entrance to the study, iron stores in women and men averaged 724 and 875 mg, respectively. After five donations, mean iron stores dropped to 67 mg in women (n = 27) and 362 mg in men (n = 30); four women (15%) became iron deficient, while two (7%) developed iron deficiency anemia. Three men (10%) developed iron deficiency, but none were found to be anemic. Mean intakes of iron were 23.3 and 22.5 mg per day, respectively, for women and men. Iron intakes were adequate to meet iron requirements of nondonors, but they were not sufficient to halt the steady decrease in iron stores among the donor population, in whom iron absorption increased from approximately 5 percent at entrance to 14 percent at the time of the fifth donation. In summary, healthy elderly persons may contribute to the national blood resource; however, donations should probably be limited to less than five per year or donors should regularly take an iron supplement to preserve reasonable amounts of iron reserves. 相似文献
73.
Introduction: Temporary GES (tempGES) can improve both gastric emptying and symptoms in post-surgical gastroparesis (PS-GP). (SSAT 2004). Long-term effects on GI symptoms and gastric emptying are unknown. Since many PS-GP patients have non-delayed emptying, the long-term effect on baseline normal or rapid emptying is also unknown.
Patients: 36 pts (6 M, 30 F, mean age 42 years) with post-surgical: Bilroth I ( n = 11), Bilroth II ( n = 4), other gastric surgery ( n = 21) disordered gastric emptying were evaluated.
Methods: GI symptoms (vomiting = V, Total = TSS), and solid meal gastric emptying (GET) at 1 and 4 h, were compared at baseline (Base), after temporary (tempGES) and permanent (permGES) gastric electrical stimulation as previously described (NGM, 2004; 16: 635.) Long-term follow-up for permanent GES ranged from 6 month to 10 years. Results were compared by t-tests, and are reported as means ± SEM.
Results: 29 of the 36 patients were able to tolerate food for baseline quantitative gastric emptying testing. 20 patients had delayed and 9 patients had non-delayed gastric emptying, with 7/9 being rapid. With both tempGES and permGES, GI symptoms improved (p < 0.05). Both tempGES and permGES showed accelerated GET for delayed patients and generally slowed GET for non-delayed (p < 0.05 for 1 h values). See tables below.
Conclusions: In a large group of post-surgical GP patients, temporary and permanent gastrointestinal electrical stimulation improved GI symptoms independent of gastric emptying and for a prolonged time. GES improves symptoms independent of baseline gastric emptying, and improves GET dependent on the baseline gastric emptying.
Patients: 36 pts (6 M, 30 F, mean age 42 years) with post-surgical: Bilroth I ( n = 11), Bilroth II ( n = 4), other gastric surgery ( n = 21) disordered gastric emptying were evaluated.
Methods: GI symptoms (vomiting = V, Total = TSS), and solid meal gastric emptying (GET) at 1 and 4 h, were compared at baseline (Base), after temporary (tempGES) and permanent (permGES) gastric electrical stimulation as previously described (NGM, 2004; 16: 635.) Long-term follow-up for permanent GES ranged from 6 month to 10 years. Results were compared by t-tests, and are reported as means ± SEM.
Results: 29 of the 36 patients were able to tolerate food for baseline quantitative gastric emptying testing. 20 patients had delayed and 9 patients had non-delayed gastric emptying, with 7/9 being rapid. With both tempGES and permGES, GI symptoms improved (p < 0.05). Both tempGES and permGES showed accelerated GET for delayed patients and generally slowed GET for non-delayed (p < 0.05 for 1 h values). See tables below.
Conclusions: In a large group of post-surgical GP patients, temporary and permanent gastrointestinal electrical stimulation improved GI symptoms independent of gastric emptying and for a prolonged time. GES improves symptoms independent of baseline gastric emptying, and improves GET dependent on the baseline gastric emptying.
74.
75.
Gestational exposure to chlorpyrifos: dose response profiles for cholinesterase and carboxylesterase activity 总被引:3,自引:2,他引:1
This study investigates the in vivo dose response profiles of the target
enzyme cholinesterase (ChE) and the detoxifying enzymes carboxylesterase
(CaE) in the fetal and maternal compartments of pregnant rats dosed with
chlorpyrifos [(O,O'-diethyl O-3,5,6-trichloro- 2-pyridyl)
phosphorothionate], a commonly used organophosphorus insecticide. Pregnant
rats were dosed daily (po) with chlorpyrifos in corn oil (0, 3, 5, 7, or 10
mg/kg) on gestational days (GD) 14-18. Animals were sacrificed 5 h after
the last chlorpyrifos dose (time of maximum brain cholinesterase
inhibition) for analysis of ChE and CaE activity in maternal blood, liver,
brain, placenta, and fetal liver and brain. The in vitro sensitivity (i.e.,
IC50, 30 min, 26 degrees C) of CaE also was determined by assaying the
activity remaining after incubation with a range of chlorpyrifos-oxon
concentrations. In vivo exposure to 10 mg/kg chlorpyrifos from GD14-18
caused overt maternal toxicity, with dose-related decreases in ChE activity
more notable in maternal brain than fetal brain. Dose-related effects were
also seen with chlorpyrifos-induced inhibition of fetal liver ChE and
maternal brain CaE activities. Gestational exposure caused no inhibition of
placental ChE or CaE, fetal brain CaE, or maternal blood CaE. ChE
activities in the maternal blood and liver, as well as fetal and maternal
liver CaE, however, were maximally inhibited by even the lowest dosage of
chlorpyrifos. The in vitro sensitivity profiles of CaE to chlorpyrifos-oxon
inhibition were valuable in predicting and verifying the in vivo CaE
response profiles. Both the in vivo and in vitro findings indicated that
fetal liver CaE inhibition was an extremely sensitive indicator of fetal
chlorpyrifos exposure.
相似文献
76.
KL Cassidy GJ Reid PJ McGrath DJ Smith TL Brown GA Finley 《Acta paediatrica (Oslo, Norway : 1992)》2001,90(11):1329-1336
The effectiveness of a eutectic mixture lidocaine-prilocaine topical anaesthetic cream (EMLA) patch compared with a placebo patch in the reduction of pain associated with intramuscular immunization was evaluated. As part of the study, 161 children (aged 4-6-y) undergoing routine diphtheria, pertussis, tetanus and polio (DPTP) immunization in five urban and five rural private office settings were randomly assigned to an EMLA patch (n = 83) or a placebo patch control group (n = 78). Pain measurements included: child's self-report on a Faces Pain Scale; facial action on the Child Facial Coding System; the Children's Hospital of Eastern Ontario Pain Scale and parent and technician ratings on a Visual Analogue Scale. Parents also rated their own and their child's immunization-related anxiety on a Visual Analogue Scale. The EMLA patch group had significantly less pain on all four pain measures compared with the placebo group. Of the children in the placebo group, 43% had clinically significant pain, compared with 17% of children in the EMLA patch group. No severe adverse symptoms occurred as a result of either EMLA or placebo patch application. CONCLUSION: The EMLA patch reduced immunization pain in 4 to 6-y-old children during needle injection. 相似文献
77.
TL Economopoulos PA Asvestas GK Matsopoulos K Gr?ndahl H-G Gr?ndahl 《Dento maxillo facial radiology》2010,39(5):300-313
Contrast correction is often required in digital subtraction radiography when comparing medical data acquired over different time periods owing to dissimilarities in the acquisition process. This paper focuses on dental radiographs and introduces a novel approach for correcting the contrast in dental image pairs.The proposed method modifies the subject images by applying typical registration techniques on their histograms. The proposed histogram registration method reshapes the histograms of the two subject images in such a way that these images are matched in terms of their contrast deviation. The method was extensively tested over 4 sets of dental images, consisting of 72 registered dental image pairs with unknown contrast differences as well as 20 dental pairs with known contrast differences. The proposed method was directly compared against the well-known histogram-based contrast correction method.The two methods were qualitatively and quantitatively evaluated for all 92 available dental image pairs. The two methods were compared in terms of the contrast root mean square difference between the reference image and the corrected image in each case. The obtained results were also verified statistically using appropriate t-tests in each set.The proposed method exhibited superior performance compared with the well-established method, in terms of the contrast root mean square difference between the reference and the corrected images. After suitable statistical analysis, it was deduced that the performance advantage of the proposed approach was statistically significant. 相似文献
78.
目的:观察褪黑素对体外培养淋巴细胞增殖及促进细胞因子分泌的作用。方法:实验于2004-10/2006-10在解放军第一二三医院南京军区肝病中心实验室完成。①实验材料:Wistar大鼠,雄性,3月龄,体质量(230±20)g,购自上海斯莱克实验动物有限责任公司。褪黑素:美国Sigma公司产品。②实验方法:采用弗氏完全佐剂加肝细胞特异性脂蛋白法建立自身免疫性肝炎大鼠模型。分别抽取正常大鼠及模型大鼠的外周血,实验室常规培养,并将其分为3组:褪黑素组培养基中加褪黑素使终浓度为2mg/L;促肝细胞生长素组培养基中加促肝细胞生长素使终浓度为2mg/L;空白对照组培养基中不加任何细胞分裂刺激剂。③实验评估:培养48h后,对外周血淋巴细胞进行常规计数并采用液体闪烁计数仪记录1min计数结果值。用于观察褪黑素与促肝细胞生长素促进外周血淋巴细胞增殖的效果。并检测培养上清液中的各细胞因子浓度,用于观察褪黑素与促肝细胞生长素促进外周血淋巴细胞分泌细胞因子的作用。结果:①褪黑素对正常大鼠外周血淋巴细胞有促进增殖作用,细胞数与1min计数值较空白对照组明显升高(P<0.05),促肝细胞生长素无促进外周血淋巴细胞增殖作用。②褪黑素对模型大鼠外周血淋巴细胞有促进增殖作用,细胞数与1min计数值较空白对照组明显升高(P<0.05),促肝细胞生长素无促进外周血淋巴细胞增殖作用。③在褪黑素作用下,正常大鼠Th1细胞因子IL-2和IFN-γ水平明显高于空白对照组和促肝细胞生长素组(P<0.01),Th2细胞因子IL-6明显升高(P<0.05),IL-4水平与空白对照组比较,差异不显著(P>0.05),促肝细胞生长素组Th1和Th2细胞因子与空白对照组无明显差异(P>0.05)。④在褪黑素作用下,模型大鼠Th1细胞因子IL-2和IFN-γ水平较空白对照和促肝细胞生长素组明显升高(P<0.05),Th2细胞因子IL-4和IL-6水平与空白对照和促肝细胞生长素组无明显差异(P>0.05)。结论:褪黑素对自身免疫性肝炎大鼠外周血淋巴细胞有较强的刺激分裂作用。 相似文献
79.
BACKGROUND: Chloramphenicol-dependent antibodies are a rare cause of interference in pretransfusion serologic testing. Their presence can be confirmed by the testing of red cells in both the presence and absence of chloramphenicol. CASE REPORT: A 29-year-old, group A, Rh-positive man with no history of chloramphenicol exposure was found to have a chloramphenicol-dependent panagglutinin in his serum. The antibody was IgM with a titer of 8. It showed no blood group specificity when tested with common and rare red cell phenotypes, and it failed to react with platelets and granulocytes. Confirmation attempts using a chloramphenicol sodium succinate solution as the cell-suspending medium led to negative results. The antibody reacted serologically only in the presence of chloramphenicol, which arises from the succinate derivative by the action of blood esterases. CONCLUSION: This case is an additional example of a chloramphenicol-dependent antibody. It demonstrates how the laboratory investigation of drug-related phenomena is dependent on testing the drug from that reacts in vivo. 相似文献
80.
Improvement in lipids after switch to boosted atazanavir or darunavir in children/adolescents with perinatally acquired HIV on older protease inhibitors: results from the Pediatric HIV/AIDS Cohort Study 下载免费PDF全文
J Jao W Yu K Patel TL Miller B Karalius ME Geffner LA DiMeglio A Mirza JS Chen M Silio EJ McFarland RB Van Dyke D Jacobson the Pediatric HIV/AIDS Cohort Study Adolescent Master Protocol study 《HIV medicine》2018,19(3):175-183