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Intracerebroventricular (icv) injection of hemicholinium-3 (HC-3) in doses of 10–20 μg causes a dose-related decrease in the blood pressure of conscious spontaneous hypertensive (SH) rats but not of normotensive rats. HC-3 also reduces heart rate (HR) in both SH and normotensive rats. The bradycardia was blocked by intravenous injection of methylatropine, implicating increased vagal activity as a cause of the response. The decrease in HR also was blocked by icv injection of atropine but not by icv injection of mecamylamine, suggesting that the bradycardia is mediated via central muscarinic receptors. In contrast, the fall in blood pressure in SH rats was not influenced by intravenous administration of methylatropine or by the icv injection of either atropine or mecamylamine. 相似文献
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Glaciations,deciduous forests,water availability and current geographical patterns in the diversity of European Carabus species 下载免费PDF全文
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María Rupérez Raquel González Ghyslain Mombo-Ngoma Abdunoor M. Kabanywanyi Esperan?a Sevene Sma?la Ouédraogo Mwaka A. Kakolwa Anifa Vala Manfred Accrombessi Valérie Briand John J. Aponte Rella Manego Zoleko Ay?la A. Adegnika Michel Cot Peter G. Kremsner Achille Massougbodji Salim Abdulla Michael Ramharter Eusébio Macete Clara Menéndez 《PLoS medicine》2016,13(2)
Background
Little is known about the effects of intermittent preventive treatment of malaria in pregnancy (IPTp) on the health of sub-Saharan African infants. We have evaluated the safety of IPTp with mefloquine (MQ) compared to sulfadoxine-pyrimethamine (SP) for important infant health and developmental outcomes.Methods and Findings
In the context of a multicenter randomized controlled trial evaluating the safety and efficacy of IPTp with MQ compared to SP in pregnancy carried out in four sub-Saharan countries (Mozambique, Benin, Gabon, and Tanzania), 4,247 newborns, 2,815 born to women who received MQ and 1,432 born to women who received SP for IPTp, were followed up until 12 mo of age. Anthropometric parameters and psychomotor development were assessed at 1, 9, and 12 mo of age, and the incidence of malaria, anemia, hospital admissions, outpatient visits, and mortality were determined until 12 mo of age. No significant differences were found in the proportion of infants with stunting, underweight, wasting, and severe acute malnutrition at 1, 9, and 12 mo of age between infants born to women who were on IPTp with MQ versus SP. Except for three items evaluated at 9 mo of age, no significant differences were observed in the psychomotor development milestones assessed. Incidence of malaria, anemia, hospital admissions, outpatient visits, and mortality were similar between the two groups. Information on the outcomes at 12 mo of age was unavailable in 26% of the infants, 761 (27%) from the MQ group and 377 (26%) from the SP group. Reasons for not completing the study were death (4% of total study population), study withdrawal (6%), migration (8%), and loss to follow-up (9%).Conclusions
No significant differences were found between IPTp with MQ and SP administered in pregnancy on infant mortality, morbidity, and nutritional outcomes. The poorer performance on certain psychomotor development milestones at 9 mo of age in children born to women in the MQ group compared to those in the SP group may deserve further studies.Trial registration
ClinicalTrials.gov NCT00811421相似文献5.
Uzay Gormus Alka Chaubey Suresh Shenoy Yong Wee Wong Lee Yin Chan Bao Ping Choo Liza Oraha Anna Gousseva Fredrik Persson Lawrence Prensky Ephrem Chin Madhuri Hegde 《Current issues in molecular biology》2021,43(2):958
Background: Rolling-circle replication (RCR) is a novel technology that has not been applied to cell-free DNA (cfDNA) testing until recently. Given the cost and simplicity advantages of this technology compared to other platforms currently used in cfDNA analysis, an assessment of RCR in clinical laboratories was performed. Here, we present the first validation study from clinical laboratories utilizing RCR technology. Methods: 831 samples from spontaneously pregnant women carrying a singleton fetus, and 25 synthetic samples, were analyzed for the fetal risk of trisomy 21 (T21), trisomy 18 (T18) and trisomy 13 (T13), by three laboratories on three continents. All the screen-positive pregnancies were provided post-test genetic counseling and confirmatory diagnostic invasive testing (e.g., amniocentesis). The screen-negative pregnancies were routinely evaluated at birth for fetal aneuploidies, using newborn examinations, and any suspected aneuploidies would have been offered diagnostic testing or confirmed with karyotyping. Results: The study found rolling-circle replication to be a highly viable technology for the clinical assessment of fetal aneuploidies, with 100% sensitivity for T21 (95% CI: 82.35–100.00%); 100.00% sensitivity for T18 (71.51–100.00%); and 100.00% sensitivity for T13 analyses (66.37–100.00%). The specificities were >99% for each trisomy (99.7% (99.01–99.97%) for T21; 99.5% (98.62–99.85%) for T18; 99.7% (99.03–99.97%) for T13), along with a first-pass no-call rate of 0.93%. Conclusions: The study showed that using a rolling-circle replication-based cfDNA system for the evaluation of the common aneuploidies would provide greater accuracy and clinical utility compared to conventional biochemical screening, and it would provide comparable results to other reported cfDNA methodologies. 相似文献
6.
Manfred Accrombessi Sma?la Ouédraogo Gino Cédric Agbota Raquel Gonzalez Achille Massougbodji Clara Menéndez Michel Cot 《PloS one》2015,10(6)
Background
Anaemia is an increasingly recognized health problem in Africa, particularly in infants and pregnant women. Although malaria is known to be the main risk factor of anaemia in both groups, the consequences of maternal factors, particularly malaria in pregnancy (MiP), on infant haemoglobin (Hb) concentrations during the first months of life are still unclear.Methods
We followed-up a cohort of 1005 Beninese pregnant women from the beginning of pregnancy until delivery. A subsample composed of the first 400 offspring of these women were selected at birth and followed until the first year of life. Placental histology and blood smear at 1st clinical antenatal visit (ANC), 2nd ANC and delivery were used to assess malaria during pregnancy. Infant Hb concentrations were measured at birth, 6, 9 and 12 months of age. A mixed multi-level model was used to assess the association between MiP and infant Hb variations during the first 12 months of life.Results
Placental malaria (difference mean [dm] = - 2.8 g/L, 95% CI [-5.3, -0.3], P = 0.03) and maternal peripheral parasitaemia at delivery (dm = - 4.6 g/L, 95% CI [-7.9, -1.3], P = 0.007) were the main maternal factors significantly associated with infant Hb concentrations during the first year of life. Poor maternal nutritional status and malaria infection during infancy were also significantly associated with a decrease in infant Hb.Conclusion
Antimalarial control and nutritional interventions before and during pregnancy should be reinforced to reduce specifically the incidence of infant anaemia, particularly in Sub-Saharan countries. 相似文献7.
8.
Matteo Ferrari Benjamin Tamilselvan Nachimuthu Roberto Antonio Donnianni Hannah Klein Achille Pellicioli 《DNA Repair》2013,12(5):347-355
Saccharomyces cerevisiae cells with a single double-strand break (DSB) activate the ATR/Mec1-dependent checkpoint response as a consequence of extensive ssDNA accumulation. The recombination factor Tid1/Rdh54, a member of the Swi2-like family proteins, has an ATPase activity and may contribute to the remodelling of nucleosomes on DNA. Tid1 dislocates Rad51 recombinase from dsDNA, can unwind and supercoil DNA filaments, and has been implicated in checkpoint adaptation from a G2/M arrest induced by an unrepaired DSB.Here we show that both ATR/Mec1 and Chk2/Rad53 kinases are implicated in the phosphorylation of Tid1 in the presence of DNA damage, indicating that the protein is regulated during the DNA damage response. We show that Tid1 ATPase activity is dispensable for its phosphorylation and for its recruitment near a DSB, but it is required to switch off Rad53 activation and for checkpoint adaptation. Mec1 and Rad53 kinases, together with Rad51 recombinase, are also implicated in the hyper-phosphorylation of the ATPase defective Tid1-K318R variant and in the efficient binding of the protein to the DSB site.In summary, Tid1 is a novel target of the DNA damage checkpoint pathway that is also involved in checkpoint adaptation. 相似文献
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Sophie Borgella Nadine Fievet Bich-Tram Huynh Samad Ibitokou Gbetognon Hounguevou Jacqueline Affedjou Jean-Claude Sagbo Parfait Houngbegnon Blaise Guezo-Mévo Achille Massougbodji Adrian J. F. Luty Michel Cot Philippe Deloron 《PloS one》2013,8(11)