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11.
Identification of a novel 74-kiloDalton immunodominant antigen of Pythium insidiosum recognized by sera from human patients with pythiosis 下载免费PDF全文
Krajaejun T Kunakorn M Pracharktam R Chongtrakool P Sathapatayavongs B Chaiprasert A Vanittanakom N Chindamporn A Mootsikapun P 《Journal of clinical microbiology》2006,44(5):1674-1680
The oomycetous, fungus-like, aquatic organism Pythium insidiosum is the etiologic agent of pythiosis, a life-threatening infectious disease of humans and animals that has been increasingly reported from tropical, subtropical, and temperate countries. Human pythiosis is endemic in Thailand, and most patients present with arteritis, leading to limb amputation and/or death, or cornea ulcer, leading to enucleation. Diagnosis of pythiosis is time-consuming and difficult. Radical surgery is the main treatment for pythiosis because conventional antifungal drugs are ineffective. The aims of this study were to evaluate the use of Western blotting for diagnosis of human pythiosis, to identify specific immunodominant antigens of P. insidiosum, and to increase understanding of humoral immune responses against the pathogen. We performed Western blot analysis on 16 P. insidiosum isolates using 12 pythiosis serum samples. These specimens were derived from human patients with pythiosis who had different forms of infection and lived in different geographic areas throughout Thailand. We have identified a 74-kDa immunodominant antigen in all P. insidiosum isolates tested. The 74-kDa antigen was also recognized by sera from all patients with pythiosis but not by control sera from healthy individuals, patients with thalassemia, and patients with various infectious diseases, indicating that Western blot analysis could facilitate diagnosis of pythiosis. Therefore, the 74-kDa antigen is a potential target for developing rapid serodiagnostic tests as well as a therapeutic vaccine for pythiosis. These advances could lead to early diagnosis and effective treatment, crucial factors for better prognosis for patients with pythiosis. 相似文献
12.
Suradej Hongeng Samart Pakakasama Ampaiwan Chuansumrit Nongnuch Sirachainan Pimpan Kitpoka Umaporn Udomsubpayakul Artit Ungkanont Saengsuree Jootar 《Biology of blood and marrow transplantation》2006,12(6):683-687
Recently published reports indicate that the outcome of unrelated donor transplantations in patients with leukemia is currently comparable to that of transplantation from identical family donors. We investigated the possibly favorable outcomes of related and unrelated transplantation in children with severe thalassemia. We reviewed transplantation outcome in 49 consecutive children with severe thalassemia who underwent allogeneic stem cell transplantation with related-donor (n=28) and unrelated-donor (n=21) stem cells between September 1992 and May 2005 at the Faculty of Medicine, Ramathibodi Hospital, Mahidol University (Bangkok, Thailand). Analysis of engraftment, frequency of procedure-related complications, and thalassemia-free survival showed no advantage from use of related-donor stem cells. The 2-year thalassemia-free survival estimate for recipients of related-donor stem cells was 82% compared with 71% in the unrelated-donor stem cell group (P=.42). The present study provides evidence to support the view that it is quite reasonable to consider unrelated-donor stem cell transplantation an acceptable therapeutic approach in severe thalassemia, at least for patients who are not fully compliant with conventional treatment and do not yet show irreversible severe complications of iron overload. 相似文献
13.
Nuanchan Jutapakdeegul Szeifoul Afadlal Nongnuch Polaboon Pansiri Phansuwan-Pujito Piyarat Govitrapong 《International journal of developmental neuroscience》2010
In the offspring of prenatal stress animals, overactivity and impaired negative feedback regulation of the hypothalamic–pituitary–adrenal axis are consistent finding. However, little was known about how prenatal stress can permanently alter developmental trajectories of pup's brain. Growth-associated protein-43 (GAP-43) is a presynaptic membrane phosphoprotein whose expression increases during developmental events such as axonal outgrowth or remodeling and synaptogenesis. Phosphorylation of GAP-43 by protein kinase C was correlated with enhanced axonal growth and transmitter release. In adult animals, increase of GAP-43 correlated with monoaminergic deficit in neuropsychiatric disorders. The present study examines the effects of repeated maternal restraint stress on the level of GAP-43 in the brain of rat pups. The results showed that prenatal stress significantly increased GAP-43 level in the PFC of rat pup during PND 7–14 as compared to control but not significant difference when observed at PND 21. Increased GAP-43 expression was also observed in the pup's hippocampus during the same postnatal periods. However, when observed at PND 60, pups born from stressed mother showed a significant lower (p < 0.001) GAP-43 expression as compare with control group. These changes indicate the direct effect of corticosteroid hormone, since repeated maternal injection with corticosterone (CORT, 40 mg/kg) during GD 14–21 also gave the same results. PND 7–14 is the peak period of synaptogenesis in these brain areas and abnormal axon sprouting and reorganization may lead to a defect in synaptic pruning at later stage of life. The results suggested that maternal stress is harmful to the developing brain and upregulation of GAP-43 indicated a protective mechanism against the toxicity of maternal stress hormone. Prenatal stress alter the normal developmental trajectories in the pup's brain may underlies the mechanism link between early life stress and neuropsychopathology in later life. 相似文献
14.
Sirachainan N Thongsad J Pakakasama S Hongeng S Chuansumrit A Kadegasem P Tirakanjana A Archararit N Sirireung S 《Thrombosis research》2012,129(6):765-770
The hypercoagulable state is well recognized in patients with severe β-thalassemia disease. One of the mechanisms of chronic hypercoagulable state is the abnormal expression of phosphatidylserine on red blood cells (RBC). This study aimed to determine the coagulable state in patients with severe β-thalassemia disease following successful stem cell transplantation (SCT). Subjects were classified into three groups: normal controls (NC), β-thalassemia disease receiving regular transfusion (Thal-RT) and β-thalassemia disease post SCT (Thal-SCT). Sixty eight subjects, aged 3-17 years, consisting of 21 NC, 28 Thal-RT and 19 Thal-SCT were enrolled. After SCT, the annexin V level in Thal-SCT was normalized. At the median follow-up time of 70.3 (50.9-84.2) months after SCT, the levels of coagulation markers (thrombin antithrombin complex, prothrombin fragment and D-dimer) and anticoagulation proteins (protein C, S and antithrombin activities) returned to the levels similar to controls. 相似文献
15.
Patcharee Komwilaisak Werasak Sasanakul Ampaiwan Chuansumrit Somjai Kanjanapongkul Somporn Wangruangsathit Apasri Lusawat Pimlak Charoenkwan Nongnuch Sirachainan 《Pediatric blood & cancer》2017,64(5)
The prevalence of protein S (PS) deficiency in Asian patients with venous thromboembolism is around 8–30%, higher than that in Caucasian populations. The present study reports the genotypes (including one novel mutation) and phenotypes of children with PS deficiency at a tertiary care institute. A total of six patients were included, three with arterial ischemic stroke, two with cerebral venous sinus thrombosis, and one with deep vein thrombosis. PS mutations were identified in four patients: p.R355C, p.G336D, p.E67A, and p.N188KfsX9. p.N188KfsX9 is a novel mutation with less than 20% PS activity noted in heterozygotes. 相似文献
16.
17.
A. Nongnuch M. Assanatham V. Sumethkul P. Chalermsanyakorn C. Kitiyakara 《Transplantation proceedings》2014
Early-onset nephrotic range proteinuria is an extremely rare presentation of an acute rejection episode. Herein, we have reported a patient who developed nephrotic range proteinuria 7 days after receiving a renal allograft from his sister despite minor changes in serum creatinine levels. A kidney biopsy spcimen revealed a T cell–mediated acute rejection process concomitant with minimal change disease (MCD). Proteinuria and renal dysfunction improved dramatically in response to corticosteroids. The possibility of acute cellular rejection and coexisting MCD should be considered in patients with early posttransplantation nephrosis and normal serum creatinine levels. The coexistence of these entities provides support for the role of T cells in the pathogenesis of MCD. 相似文献
18.
Jatuporn Wichitsranoi Suphannika Ladawan Suchart Sirijaichingkul Nongnuch Settasatian Naruemon Leelayuwat 《Journal of Physical Therapy Science》2015,27(11):3503-3509
[Purpose] This research aimed to investigate the relationship between aerobic capacity
(VO2,peak) and cardiovascular risk factors in normolipidemic and dyslipidemic
Thai men and women. [Subjects and Methods] We recruited 104 dyslipidemic and 100 healthy
participants. Fasting blood samples were analyzed for lipid and blood glucose levels.
Anthropometry, blood pressure, and body composition were measured before exercise. Each
subject underwent exercise testing to determine VO2, peak. Heart rate (HR) was
recorded throughout the exercise test. [Results] Dyslipidemic participants had a lower
VO2, peak than normolipidemic participants (p<0.01). In normolipidemic
male participants, VO2, peak was positively correlated with high density
lipoprotein cholesterol (HDL-C) levels and negatively correlated with low density
lipoprotein cholesterol (LDL-C) levels and triglycerides to HDL-cholesterol (TG/HDL-C)
ratios; in females, VO2, peak was negatively correlated with age, total
cholesterol, and LDL-C. In dyslipidemic males, VO2, peak was positively
correlated with HDL-C levels and negatively correlated with age, LDL-C and TG levels, and
percent body fat; in females, VO2, peak was positively correlated with resting
HR and heart rate recovery and negatively correlated with age, TG/HDL-C, and waist
circumference. [Conclusion] There was a relationship between aerobic capacity and
cardiovascular disease risk factors in both normolipidemic and dyslipidemic participants.
This relationship was affected by gender.Key words: Peak oxygen consumption, Lipid profiles, Heart rate 相似文献
19.
Miao HZ Sirachainan N Palmer L Kucab P Cunningham MA Kaufman RJ Pipe SW 《Blood》2004,103(9):3412-3419
Factor VIII (FVIII) functions as a cofactor within the intrinsic pathway of blood coagulation. Quantitative or qualitative deficiencies of FVIII result in the inherited bleeding disorder hemophilia A. Expression of FVIII (domain structure A1-A2-B-A3-C1-C2) in heterologous mammalian systems is 2 to 3 orders of magnitude less efficient compared with other proteins of similar size compromising recombinant FVIII production and gene therapy strategies. FVIII expression is limited by unstable mRNA, interaction with endoplasmic reticulum (ER) chaperones, and a requirement for facilitated ER to Golgi transport through interaction with the mannose-binding lectin LMAN1. Bioengineering strategies can overcome each of these limitations. B-domain-deleted (BDD)-FVIII yields higher mRNA levels, and targeted point mutations within the A1 domain reduce interaction with the ER chaperone immunoglobulin-binding protein. In order to increase ER to Golgi transport we engineered several asparagine-linked oligosaccharides within a short B-domain spacer within BDD-FVIII. A bioengineered FVIII incorporating all of these elements was secreted 15- to 25-fold more efficiently than full-length FVIII both in vitro and in vivo. FVIII bioengineered for improved secretion will significantly increase potential for success in gene therapy strategies for hemophilia A as well as improve recombinant FVIII production in cell culture manufacturing or transgenic animals. 相似文献
20.