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排序方式: 共有194条查询结果,搜索用时 15 毫秒
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Río P Agirre X Garate L Baños R Álvarez L San José-Enériz E Badell I Casado JA Garín M Prósper F Bueren JA 《Blood》2012,119(13):3042-3049
Fanconi anemia (FA) is an inherited genetic disorder associated with BM failure and cancer predisposition. In the present study, we sought to elucidate the role of microRNAs (miRNAs) in the hematopoietic defects observed in FA patients. Initial studies showed that 3 miRNAs, hsa-miR-133a, hsa-miR-135b, and hsa-miR-181c, were significantly down-regulated in lymphoblastoid cell lines and fresh peripheral blood cells from FA patients. In vitro studies with cells expressing the luciferase reporter fused to the TNFα 3'-untranslated region confirmed in silico predictions suggesting an interaction between hsa-miR-181c and TNFα mRNA. These observations were consistent with the down-regulated expression of TNFα mediated by hsa-miR-181c in cells from healthy donors and cells from FA patients. Because of the relevance of TNFα in the hematopoietic defects of FA patients, in the present study, we transfected BM cells from FA patients with hsa-miR-181c to evaluate the impact of this miRNA on their clonogenic potential. hsa-miR-181c markedly increased the number and size of the myeloid and erythroid colonies generated by BM cells from FA patients. Our results offer new clues toward understanding the biologic basis of BM failure in FA patients and open new possibilities for the treatment of the hematologic dysfunction in FA patients based on miRNA regulation. 相似文献
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Rodríguez-Castro Emilio Arias-Rivas Susana Santamaría-Cadavid María López-Dequidt Iria Rodríguez-Yáñez Manuel Mosqueira Antonio Jesús Blanco Ulla Miguel Vázquez Herrero Fernando Castiñeira José Antonio Martínez-Sáez Elena Pérez Béliz Edurne Mosquera Nilo Caicedo Diego Fraga Máximo Pumar José Manuel 《Journal of neurology》2022,269(10):5629-5637
Journal of Neurology - Determining the cause of acute ischemic stroke is crucial for patient management, particularly for preventing future stroke. In recent years, carotid web (CW), a... 相似文献
5.
Ramos E Piñeiro D Soto M Abanades DR Martín ME Salinas M González VM 《Laboratory investigation; a journal of technical methods and pathology》2007,87(5):409-416
Aptamers are short single-stranded DNA or RNA oligonucleotides that are selected in vitro by their affinity and specificity for the target. Binding is a consequence of the particular tertiary structure that they are able to acquire, depending on their sequence. Parasites of the genus Leishmania belongs to the lower eukaryote order Kinetoplastida that causes leishmaniosis in man and animals. Histone genes in Leishmania are of considerable interest because these flagellates do not condense their chromatin during mitosis. Thus, the study of the structural features of histones has been considered of particular interest and, as a result, in recent years a great number of histone genes have been characterized in trypanosomatids. Histones are extremely conserved proteins, reflecting their apparent universality of function. Sequence similarity of kinetoplastid core histones those of higher eukaryotes is found predominantly in the globular region with high sequence divergences in the N- and in the C-terminal domains. These divergences indicate that they may be potential diagnostic and/or therapeutics targets. We have successfully isolated a pool of DNA sequences, named SELH2A, which specifically binds to Leishmania infantum H2A. When tested in an enzyme-linked oligonucleotide assay, slot blot and Western blot analysis, the aptamer pool exhibited specificity in its ability to bind only to H2A antigen but not to other proteins from L. infantum including other histones. Thus, it appears that this novel anti-H2A aptamer population may be of potential application as a diagnostic system for leishmaniosis. 相似文献
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Miriam Araña Juan J. Gavira Estefanía Peña Arantxa González Gloria Abizanda Myriam Cilla Marta M. Pérez Edurne Albiasu Natalia Aguado Mayte Casado Begoña López Susana González Mario Soriano Cristina Moreno Juana Merino José M. García-Verdugo Javier Díez Manuel Doblaré Beatriz Pelacho Felipe Prosper 《Biomaterials》2014
Although transplantation of adipose-derived stem cells (ADSC) in chronic myocardial infarction (MI) models is associated with functional improvement, its therapeutic value is limited due to poor long-term cell engraftment and survival. Thus, the objective of this study was to examine whether transplantation of collagen patches seeded with ADSC could enhance cell engraftment and improve cardiac function in models of chronic MI. With that purpose, chronically infarcted Sprague–Dawley rats (n = 58) were divided into four groups and transplanted with media, collagen scaffold (CS), rat ADSC, or CS seeded with rat ADSC (CS-rADSC). Cell engraftment, histological changes, and cardiac function were assessed 4 months after transplantation. In addition, Göttingen minipigs (n = 18) were subjected to MI and then transplanted 2 months later with CS or CS seeded with autologous minipig ADSC (CS-pADSC). Functional and histological assessments were performed 3 months post-transplantation. Transplantation of CS-rADSC was associated with increased cell engraftment, significant improvement in cardiac function, myocardial remodeling, and revascularization. Moreover, transplantation of CS-pADSC in the pre-clinical swine model improved cardiac function and was associated with decreased fibrosis and increased vasculogenesis. In summary, transplantation of CS-ADSC resulted in enhanced cell engraftment and was associated with a significant improvement in cardiac function and myocardial remodeling. 相似文献
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OBJECTIVE: To characterize meiotic anomalies in infertile men by multiplex fluorescence in situ hybridization (M-FISH) and to determine whether synaptic problems affect specific bivalents or whether anomalies are random. DESIGN: Analysis of meiotic preparations with standard techniques and M-FISH. SETTING: Assisted reproduction centers and Universitat Autònoma de Barcelona. PATIENT(S): Three fertile men undergoing vasectomy, four sterile patients with oligoasthenoteratozoospermia, and one patient with a Robertsonian translocation t(13;14). INTERVENTION(S): Unilateral testicular biopsy in controls and patients with oligoasthenoteratozoospermia and collection of a semen sample from the translocation carrier. MAIN OUTCOME MEASURE(S): Identification of bivalents in metaphase I and chromosomes in metaphase II and characterization of chromosome abnormalities. RESULT(S): All bivalents in metaphase I and all chromosomes in metaphase II could be identified. In controls and in one patient with oligoasthenoteratozoospermia, meiosis was normal. Other patients with oligoasthenoteratozoospermia showed different types of anomaly: desynapsis, breaks, precocious XY separation, or cryptic reorganizations. The Robertsonian translocation t(13;14) was easily identified. CONCLUSION(S): Results confirm the high incidence of synaptic errors in oligoasthenoteratozoospermia patients. Bivalents in metaphase I and chromosomes in metaphase II were individually identifiable. Nondisjunctional errors or small reorganizations overlooked in classic meiotic preparations were identified. Synaptic anomalies seem to affect meiotic bivalents at random. 相似文献
8.
Jose Perea Edurne Alvaro Yolanda Rodríguez Cristina Gravalos Eva Sánchez-Tomé Barbara Rivera Francisco Colina Pablo Carbonell Rogelio González-Sarmiento Manuel Hidalgo Miguel Urioste 《World journal of gastroenterology : WJG》2010,16(29):3697-3703
AIM:To characterize clinicopathological and familial features of early-onset colorectal cancer(CRC) and compare features of tumors with and without microsatellite instability(MSI).METHODS:Forty-five patients with CRC aged 45 or younger were included in the study.Clinical information,a three-generation family history,and tumor samples were obtained.MSI status was analyzed and mismatch repair genes were examined in the MSI families.Tumors were included in a tissue microarray and an immunohistochemical study w... 相似文献
9.
Elizondo E Sala S Imbuluzqueta E González D Blanco-Prieto MJ Gamazo C Ventosa N Veciana J 《Pharmaceutical research》2011,28(2):309-321
Purpose
To investigate, for the first time, the viability of compressed antisolvent methodologies for the preparation of drug-loaded particles of the biodegradable and bioadhesive polymer poly (methyl vinyl ether-co-maleic anhydride) (PVM/MA), utilizing gentamicin (Gm) as a model drug. 相似文献10.
Bathen TF Jensen LR Sitter B Fjösne HE Halgunset J Axelson DE Gribbestad IS Lundgren S 《Breast cancer research and treatment》2007,106(2):181-189
The purpose of the study was to evaluate the use of metabolic phenotype, described by high-resolution magic angle spinning
magnetic resonance spectroscopy (HR MAS MRS), as a tool for prediction of histological grade, hormone status, and axillary
lymphatic spread in breast cancer patients. Biopsies from breast cancer (n = 91) and adjacent non-involved tissue (n = 48) were excised from patients (n = 77) during surgery. HR MAS MR spectra of intact samples were acquired. Multivariate models relating spectral data to histological
grade, lymphatic spread, and hormone status were designed. The multivariate methods applied were variable reduction by principal
component analysis (PCA) or partial least-squares regression-uninformative variable elimination (PLS-UVE), and modelling by
PLS, probabilistic neural network (PNN), or cascade correlation neural network. In the end, model verification by prediction
of blind samples (n = 12) was performed. Validation of PNN training resulted in sensitivity and specificity ranging from 83 to 100% for all predictions.
Verification of models by blind sample testing showed that hormone status was well predicted by both PNN and PLS (11 of 12
correct), lymphatic spread was best predicted by PLS (8 of 12), whereas PLS-UVE PNN was the best approach for predicting grade
(9 of 12 correct). MR-determined metabolic phenotype may have a future role as a supplement for clinical decision-making-concerning
adjuvant treatment and the adaptation to more individualised treatment protocols. 相似文献