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2.
Chromosomal translocations and karyotype complexity in chronic lymphocytic leukemia: A systematic reappraisal of classic cytogenetic data
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Panagiotis Baliakas Michalis Iskas Anne Gardiner Zadie Davis Karla Plevova Florence Nguyen‐Khac Jitka Malcikova Achilles Anagnostopoulos Sharron Glide Sarah Mould Kristina Stepanovska Martin Brejcha Chrysoula Belessi Frederic Davi Sarka Pospisilova Anastasia Athanasiadou Kostas Stamatopoulos David Oscier 《American journal of hematology》2014,89(3):249-255
The significance of chromosomal translocations (CTRAs) and karyotype complexity (KC) in chronic lymphocytic leukemia (CLL) remains uncertain. To gain insight into these issues, we evaluated a series of 1001 CLL cases with reliable classic cytogenetic data obtained within 6 months from diagnosis before any treatment. Overall, 320 cases were found to carry ≥1 CTRAs. The most frequent chromosome breakpoints were 13q, followed by 14q, 18q, 17q, and 17p; notably, CTRAs involving chromosome 13q showed a wide spectrum of translocation partners. KC (≥3 aberrations) was detected in 157 cases and significantly (P < 0.005) associated with unmutated IGHV genes and aberrations of chromosome 17p. Furthermore, it was identified as an independent prognostic factor for shorter time‐to‐first‐treatment. CTRAs were assigned to two categories (i) CTRAs present in the context of KC, often with involvement of chromosome 17p aberrations, occurring mostly in CLL with unmutated IGHV genes; in such cases, we found that KC rather than the presence of CTRAs per se negatively impacts on survival; (ii) CTRAs in cases without KC, having limited if any impact on survival. On this evidence, we propose that all CTRAs in CLL are not equivalent but rather develop by different processes and are associated with distinct clonal behavior. Am. J. Hematol. 89:249–255, 2014. © 2013 Wiley Periodicals, Inc. 相似文献
3.
Magda Vytrisalova Leos Fuksa Vladimir Palicka Svatopluk Byma Sarka Blazkova Jan Stepan Tereza Hendrychova Jiri Vlcek Petr Pavek 《Central European Journal of Medicine》2014,9(5):687-693
Rationale and objectives
General practitioners (GPs) play an important role in management of patients at risk of osteoporosis (OP). The objectives were to assess (1) knowledge about OP and use of OP clinical guideline in comparison with other information sources and (2) association between the use of individual information sources and knowledge and self-reported quality of care among GPs.Methods
Survey among random sample of Czech GPs was performed to find out their attitudes and role in OP management. The return rate of the postal questionnaire was 38% (525 respondents). Quality of care was assessed using three indicators: suspicion on OP, referral to the specialist and initial check-up.Results
Respondents (median age 52 years, 59% women) had a very good knowledge of several risk factors, while others, namely low body mass index, history of hip fracture in mother and smoking were perceived as risk factors by only 40%, 45% and 55% of respondents, respectively. 10% of GPs stated the correct answer regarding daily calcium intake recommended for postmenopausal women. The OP guideline was considered accessible by 83% of respondents and used repeatedly by 54%. Use of the guideline correlated positively with knowledge score (P < 0.001), while use of each individual other source of information did not. Use of the guideline correlated with all three indicators of quality of care. Use of each other information source correlated only with a maximum of two indicators.Conclusion
We identified areas of insufficient knowledge that should be targeted in educational activities for GPs. It is recommended to further motivate GPs to use their clinical guidelines regularly. 相似文献4.
Petr Hrubý Luk Kalina Vlastimil Bílek Jr. Sarka Keprdova Jií Msilko Iveta Plkov Jan Koplík Libor Topol 《Materials》2022,15(4)
Alkali-activated systems (AAS) represent an ecologically and economically sustainable inorganic binder as an alternative to ordinary Portland cement (OPC). One of the main benefits of AAS is their durability in aggressive environments, which can be equal or even better than that of OPC. In this paper, the influence of the type of alkaline activator in alkali-activated blast furnace slag (AAS) in terms of resistance to sulfur dioxide corrosion was investigated. The durability testing process was based on the CSN EN ISO 3231 standard and simultaneously compared with mortar samples prepared by using Blastfurnace cement CEM III/A 32.5R. The degradation progress was evaluated by employing several different methods such as observing the compressive strength development, weight change evaluation, non-destructive testing methods like ultrasound or impact echo technique, or visual phenolphthalein technique. Subsequently, fundamental characterization of samples by the XRD method was performed during the degradation test. The obtained results indicate that none of the testing methods used could be prioritized over others to determine the resistance of AAS against the action of sulfur dioxide. For this reason, the durability testing of AAS remains an issue, and the development of specific standards considering the behavior of AAS seems necessary. 相似文献
5.
Lesley-Ann Sutton Viktor Ljungstr?m Larry Mansouri Emma Young Diego Cortese Veronika Navrkalova Jitka Malcikova Alice F. Muggen Martin Trbusek Panagiotis Panagiotidis Frederic Davi Chrysoula Belessi Anton W. Langerak Paolo Ghia Sarka Pospisilova Kostas Stamatopoulos Richard Rosenquist 《Haematologica》2015,100(3):370-376
Next-generation sequencing has revealed novel recurrent mutations in chronic lymphocytic leukemia, particularly in patients with aggressive disease. Here, we explored targeted re-sequencing as a novel strategy to assess the mutation status of genes with prognostic potential. To this end, we utilized HaloPlex targeted enrichment technology and designed a panel including nine genes: ATM, BIRC3, MYD88, NOTCH1, SF3B1 and TP53, which have been linked to the prognosis of chronic lymphocytic leukemia, and KLHL6, POT1 and XPO1, which are less characterized but were found to be recurrently mutated in various sequencing studies. A total of 188 chronic lymphocytic leukemia patients with poor prognostic features (unmutated IGHV, n=137; IGHV3-21 subset #2, n=51) were sequenced on the HiSeq 2000 and data were analyzed using well-established bioinformatics tools. Using a conservative cutoff of 10% for the mutant allele, we found that 114/180 (63%) patients carried at least one mutation, with mutations in ATM, BIRC3, NOTCH1, SF3B1 and TP53 accounting for 149/177 (84%) of all mutations. We selected 155 mutations for Sanger validation (variant allele frequency, 10–99%) and 93% (144/155) of mutations were confirmed; notably, all 11 discordant variants had a variant allele frequency between 11–27%, hence at the detection limit of conventional Sanger sequencing. Technical precision was assessed by repeating the entire HaloPlex procedure for 63 patients; concordance was found for 77/82 (94%) mutations. In summary, this study demonstrates that targeted next-generation sequencing is an accurate and reproducible technique potentially suitable for routine screening, eventually as a stand-alone test without the need for confirmation by Sanger sequencing. 相似文献
6.
Preliminary analysis of the mouse cerebellum proteome 总被引:7,自引:0,他引:7
Beranova-Giorgianni S Pabst MJ Russell TM Giorgianni F Goldowitz D Desiderio DM 《Brain research. Molecular brain research》2002,98(1-2):135-140
This paper reports on the initial analysis of protein expression in the mouse cerebellum with the proteomics approach. Proteins from cerebellar tissue homogenates were separated by two-dimensional gel electrophoresis, and the proteins were stained with colloidal Coomassie Blue to produce a high-resolution map of the cerebellum proteome. Selected proteins from this map were digested with trypsin, and the resulting tryptic peptides were analyzed by matrix-assisted laser desorption/ionization mass spectrometry and liquid chromatography-electrospray quadrupole ion trap mass spectrometry. The mass spectrometric data were used to identify the proteins through searches of the SWISSPROT protein sequence database. To date, 30 prominent proteins with various functional characteristics were identified. These data will be used for future studies of differential protein expression in mouse models of neurological disorders. 相似文献
7.
Christina Williams Alicia J. Long Heather Noga Catherine Allaire Mohamed A. Bedaiwy Sarka Lisonkova Paul J. Yong 《Journal of minimally invasive gynecology》2019,26(3):507-515
Study Objective
To investigate ethnic differences for moderate-to-severe endometriosis.Design
Analysis of a prospective registry (Canadian Task Force classification II-2).Setting
Tertiary referral center.Patients
A total of 1594 women with pelvic pain and/or endometriosis.Interventions
NoneMeasurements and Main Results
On logistic regression, adjusting for potential confounders, East/South East Asians were 8.3 times more likely than whites to have a previous diagnosis of stage III/IV endometriosis before referral (adjusted odds ratio [aOR], 8.33; 95% confidence interval [CI], 3.74–18.57), 2.7 times more likely to have a palpable nodule (aOR, 2.66; 95% CI, 1.57–4.52), 4.1 times more likely to have an endometrioma on ultrasound (aOR, 4.10; 95% CI, 2.68–6.26), and 10.9 times more likely to have stage III/IV endometriosis at the time of surgery at our center (aOR, 10.87; 95% CI, 4.34–27.21).Conclusion
Moderate-to-severe endometriosis was more common in women with East or South East Asian ethnicity in our tertiary referral center. This could be explained by East/South East Asians with minimal to mild disease being less likely to seek care or genetic/environmental differences that increase the risk of more severe disease among East/South East Asians. (ClinicalTrials.gov, NCT02911090.) 相似文献8.
Daniel Darbyshire MBBS PGDip MRCS FHEA Daniel Rowbotham BA Sarka Grayson Julia Taylor MSc RGN David Shackley MBChB MD FRCS 《International Journal of Urological Nursing》2016,10(1):14-20
About 15–20% of hospital inpatients are catheterized, and it has been estimated that in an average sized hospital 10–15 patients will die each year from catheter‐related sepsis. Reducing catheterization rates or indwell times has been shown to reduce associated sepsis. This study examined patient experience of catheterization; the rationale for the study was to broaden understanding of catheter impact as part of a wider quality improvement agenda. Fifty patients completed a detailed catheter‐experience patient questionnaire. The patients were all inpatients from 17 wards across a range of specialties. Data were sought on demographics, catheter status, experience and their knowledge of and involvement in the catheter care. Fifty percent gender split. Median catheter time was 5 d (range 2 h to long term). Median age 72 years (range 22–92). Thirty‐four percent (n = 17) of patients did not have the process and options discussed before catheterization. Eighteen percent did not know why they were catheterized. Patients experienced leaking (32%), ‘pain’ (26%), inconvenience (26%), embarrassment (24%), blocking (24%) with 8% finding their catheters ‘restrictive’. Fourteen percent felt they could have coped without the catheter. Urinary catheters have a profound and often negative effect on the inpatient experience. This information can help support and empower colleagues to push for less urinary catheter use in the non‐urological inpatient population and start to better understand the patient experience. 相似文献
9.
Josef Bednarik Eva Vlckova-Moravcova Sarka Bursova Jana Belobradkova Ladislav Dusek Claudia Sommer 《Journal of the peripheral nervous system : JPNS》2009,14(3):177-183
The aim of this study was to evaluate the etiology in a group of 84 patients with painful sensory neuropathy with predominant small-fiber dysfunction (54 men and 30 women, median: 58; range: 25–83 years) recruited from a population of the South Moravian region of the Czech Republic. Involvement of small nerve fibers was verified by abnormal thermal thresholds and/or reduced intraepidermal nerve fiber densities. Motor signs or symptoms or significant clinical signs of sensory large-fiber involvement were exclusionary; 33 patients, however, had sensory nerve conduction abnormalities. For comparison, the prevalence of risk factors was assessed in a group of 47 asymptomatic age- and sex-matched controls (30 men and 17 women, median: 59; range: 29–85 years). The multivariate regression model disclosed that diabetes mellitus (odds ratio [OR] = 4.08), chronic alcoholism (OR = 5.31), and serum cholesterol levels (OR = 4.51) were the only parameters independently associated with small-fiber involvement. No possible etiology was detected in 19 patients (22.6%). In conclusion, the spectrum of risk factors and proportion of idiopathic cases in geographically defined small-fiber polyneuropathy sample is similar to that referred in large-fiber polyneuropathy. 相似文献
10.
Bendova S Krepelova A Petrak B Kinstova L Musova Z Rausova E Marikova T 《Journal of molecular neuroscience : MN》2007,31(3):273-279
Neurofibromatosis type 1 (NF1) is one of the most common inherited human disorders, with an estimated incidence of 1 per 3500 births. In most cases, the disease is caused either by mutation in the NF1 gene, or by a particular or complete deletion of the NF1 gene. The NF1 gene exhibits one of the highest mutation rates of any human disorder. In this experimental study of the NF1 gene, we screened the mutational spectrum of 22 unrelated patients from the Czech Republic using the denaturing high-performance liquid chromatography (DHPLC) and multiplex ligation-dependent probe amplification (MLPA) methods. We found NF1 mutations in 17 patients: 15 causal mutations were detected with the use of the DHPLC method (15/20, 75%). With the MPLA method, we also confirmed and specified two large deletions that were previously genotyped by microsatellite markers. Twelve of the above-mentioned mutations were newly found: c.1_2delATinsCC, c.1185+1G>C, c.1757_1760delCTAG, c.1642-7A>G, c.2329 T>G, c.2816delA, c.3738_3741delGTTT, c.4733 C>T, c.5220delT, c.6473_6474insGAAG, ex14_49del, ex28_49del. We present this study as a first effectual step in the routine diagnosis of the NF1 in patients from the Czech Republic. 相似文献