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Miklos D. Kertai Sreekanth Cheruku Wenjing Qi Yi-Ju Li G. Chad Hughes Joseph P. Mathew Jörn A. Karhausen 《The Journal of thoracic and cardiovascular surgery》2017,153(1):68-76.e2
Objective
Aortic surgeries requiring hypothermic circulatory arrest evoke systemic inflammatory responses that often manifest as vasoplegia and hypotension. Because mast cells can rapidly release vasoactive and proinflammatory effectors, we investigated their role in intraoperative hypotension.Methods
We studied 31 patients undergoing proximal aortic repair with hypothermic circulatory arrest between June 2013 and April 2015 at Duke University Medical Center. Plasma samples were obtained at different intraoperative time points to quantify chymase, interleukin-6, interleukin-8, tumor necrosis factor alpha, and white blood cell CD11b expression. Hypotension was defined as the area (minutes × millimeters mercury) below a mean arterial pressure of 55 mm Hg. Biomarker responses and their association with intraoperative hypotension were analyzed by 2-sample t test and Wilcoxon rank sum test. Multivariable logistic regression analysis was used to examine the association between clinical variables and elevated chymase levels.Results
Mast cell-specific chymase increased from a median 0.97 pg/mg (interquartile range [IQR], 0.01-1.84 pg/mg) plasma protein at baseline to 5.74 pg/mg (IQR, 2.91-9.48 pg/mg) plasma protein after instituting cardiopulmonary bypass, 6.16 pg/mg (IQR, 3.60-9.41 pg/mg) plasma protein after completing circulatory arrest, and 7.64 pg/mg (IQR, 4.63-12.71 pg/mg) plasma protein after weaning from cardiopulmonary bypass (each P value < .0001 vs baseline). Chymase was the only biomarker associated with hypotension during (P = .0255) and after (P = .0221) cardiopulmonary bypass. Increased temperatures at circulatory arrest and low presurgical hemoglobin levels were independent predictors of increased chymase responses.Conclusions
Mast cell activation occurs in cardiac surgery requiring cardiopulmonary bypass and hypothermic circulatory arrest and is associated with intraoperative hypotension. 相似文献45.
Frederick L. Grover Sreekanth Vemulapalli John D. Carroll Fred H. Edwards Michael J. Mack Vinod H. Thourani Ralph G. Brindis David M. Shahian Carlos E. Ruiz Jeffrey P. Jacobs George Hanzel Joseph E. Bavaria E. Murat Tuzcu Eric D. Peterson Susan Fitzgerald Matina Kourtis Joan Michaels Barbara Christensen David R. Holmes 《The Annals of thoracic surgery》2017,103(3):1021-1035
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O. Sreekanth Reddy M.C.S. Subha T. Jithendra C. Madhavi K. Chowdoji Rao 《Journal of Pharmaceutical Analysis》2021,11(2):191
The aim of the present work is fabrication of dual cross linked sodium alginate (SA)/montmorillonite (MMT) microbeads as a potential drug vehicle for extended release of curcumin (CUR). The microbeads were prepared using in situ ion-exchange followed by simple ionotropic gelation technique. The developed beads were characterized by Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), X-ray diffraction (X-RD) and scanning electron microscopy (SEM). The effect of MMT on encapsulation efficiency of CUR and intercalation kinetics was investigated. Dynamic swelling study and in vitro release study were investigated in simulated intestinal fluid (pH 7.4) and simulated gastric fluid (pH 1.2) at 37 °C. Results suggested that both the swelling and in vitro release studies were influenced by the pH of test media, which might be suitable for intestinal drug delivery. The release mechanism was analyzed by fitting the release data into Korsmeyer-Peppas equation. 相似文献
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Selvaraj Sreekanth M. Christina Judith J. Gurumoorthy Sinthuja Jayaraman Bagavad Gita Vellaichamy Adaikkalam 《Inflammation research》2019,68(5):347-349
Inflammation Research - CRP gene polymorphism is common in inflammatory diseases, but such association has not been reported in periodontitis. Our objective was to interrogate SNPs of crp in... 相似文献
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Coteron JM Marco M Esquivias J Deng X White KL White J Koltun M El Mazouni F Kokkonda S Katneni K Bhamidipati R Shackleford DM Angulo-Barturen I Ferrer SB Jiménez-Díaz MB Gamo FJ Goldsmith EJ Charman WN Bathurst I Floyd D Matthews D Burrows JN Rathod PK Charman SA Phillips MA 《Journal of medicinal chemistry》2011,54(15):5540-5561
Drug therapy is the mainstay of antimalarial therapy, yet current drugs are threatened by the development of resistance. In an effort to identify new potential antimalarials, we have undertaken a lead optimization program around our previously identified triazolopyrimidine-based series of Plasmodium falciparum dihydroorotate dehydrogenase (PfDHODH) inhibitors. The X-ray structure of PfDHODH was used to inform the medicinal chemistry program allowing the identification of a potent and selective inhibitor (DSM265) that acts through DHODH inhibition to kill both sensitive and drug resistant strains of the parasite. This compound has similar potency to chloroquine in the humanized SCID mouse P. falciparum model, can be synthesized by a simple route, and rodent pharmacokinetic studies demonstrated it has excellent oral bioavailability, a long half-life and low clearance. These studies have identified the first candidate in the triazolopyrimidine series to meet previously established progression criteria for efficacy and ADME properties, justifying further development of this compound toward clinical candidate status. 相似文献