全文获取类型
收费全文 | 926篇 |
免费 | 0篇 |
专业分类
综合类 | 1篇 |
化学工业 | 2篇 |
建筑科学 | 1篇 |
轻工业 | 1篇 |
冶金工业 | 921篇 |
出版年
2022年 | 1篇 |
2016年 | 1篇 |
2013年 | 1篇 |
1999年 | 26篇 |
1998年 | 266篇 |
1997年 | 144篇 |
1996年 | 105篇 |
1995年 | 65篇 |
1994年 | 50篇 |
1993年 | 53篇 |
1992年 | 6篇 |
1991年 | 8篇 |
1990年 | 9篇 |
1989年 | 12篇 |
1988年 | 9篇 |
1987年 | 6篇 |
1986年 | 10篇 |
1985年 | 3篇 |
1983年 | 2篇 |
1982年 | 3篇 |
1981年 | 8篇 |
1980年 | 8篇 |
1979年 | 1篇 |
1978年 | 2篇 |
1977年 | 44篇 |
1976年 | 78篇 |
1975年 | 1篇 |
1966年 | 1篇 |
1965年 | 1篇 |
1962年 | 1篇 |
1955年 | 1篇 |
排序方式: 共有926条查询结果,搜索用时 15 毫秒
131.
132.
133.
134.
135.
136.
LS Hofstra GB Kristensen PH Willemse A Vindevoghel H Meden M Lahousen F Oberling B Sorbe M Crump I Sklenar WJ Sluiter B Kiese CG Trope EG de Vries 《Canadian Metallurgical Quarterly》1998,16(10):3335-3344
PURPOSE: To determine whether recombinant human interleukin-3 (rhIL-3) reduces bone marrow depression and improves chemotherapeutic schedule adherence in ovarian cancer patients receiving first-line combination chemotherapy. PATIENTS AND METHODS: In a randomized multicenter study, 185 patients received carboplatin (dose based on projected area under the concentration-time curve [AUC]=4) and cyclophosphamide (750 mg/m2) day 1, every 3 weeks for six cycles. Patients were randomized to receive rhIL-3 (5 microg/kg) or placebo once daily subcutaneously on days 3 to 12. RESULTS: Adherence to chemotherapeutic regimen, mean chemotherapy cycle length, tumor response rate, and median survival at 24 months did not differ between groups. The number of side effects-primarily allergic reactions, flu-like symptoms and fever-were higher in the rhIL-3 group, which resulted in 21 discontinuations compared with one in the placebo group. Compared with placebo, the rhIL-3 group had higher platelet counts day 1 of cycles 2 to 6. The number of patients with World Health Organization (WHO) grade IV thrombocytopenia or number of platelet transfusions did not differ. Leukocyte counts differed only in cycles 1 and 2 between groups. The leukocyte nadir occurred earlier in the rhIL-3 (day 12) than in the placebo group (day 15, P=.006). Leukocytes and neutrophils were only higher in the rhIL-3 group day 1 of cycle 2. In cycles 4 and 5, more patients with WHO grade IV neutropenia received rhIL-3 (P < .005). Eosinophil counts were higher day 1 of cycles 2 to 6 in the rhIL-3 group (P < .0001). CONCLUSION: rhIL-3 had stimulatory hematopoietic effects. This did not result either in reduction of platelet transfusions or in improvement of chemotherapeutic schedule adherence. There were more side effects in the rhIL-3 group than in the placebo group. rhIL-3 at 5 microg/kg/d is, therefore, not of clinical benefit in this chemotherapeutic regimen. 相似文献
137.
R Reim?o MM De Gouveia MC Pestana SR Lopes EG Papaiz LF Papaiz 《Canadian Metallurgical Quarterly》1994,52(4):560-565
The case of a 40-year-old male patient with obstructive sleep apnea syndrome (OSAS) is reported, with emphasis on treatment with a dental appliance. This therapeutic approach, which has been focused on recent research, has as its objective, the posturing of the mandibule and, consequently, the tongue more anteriorly, thus in turn leading to an increase in the posterior oropharyngeal airway space (PAS). Cephalometry contributed determining in this case whereby enlargement limits were observed in the PAS with mandibular displacement. Clinical and polysomnographic controls showed subjective reduction of the excessive daytime sleepiness and objective decrease in apneas intensity to normal limits. Eight months follow-up evidenced the steady improvement. 相似文献
138.
TM Sullivan BH Gray JM Bacharach J Perl MB Childs L Modzelewski EG Beven 《Canadian Metallurgical Quarterly》1998,28(6):1059-1065
A new macrocyclic of the bis(benzylisoquinoline) alkaloid family, d-(+)-tubocurarine chloride (DTC), has been evaluated as a chiral selector for the separation of optical isomers of organic carboxylates using capillary electrophoresis (CE). The pertinent physicochemical properties, such as absorption spectrum, isoionic point, and solution conformation, of DTC were determined. The effects of varying such experimental parameters as DTC concentration, pH, and methanol content in the running buffer were assessed. CE separation of the enantiomers of 18 different compounds was achieved using DTC as the chiral selector under optimized background electrolytic conditions. 相似文献
139.
E Kiss AG Brittsan I Edes IL Grupp G Grupp EG Kranias 《Canadian Metallurgical Quarterly》1998,83(6):608-613
Total serum IgE, Phadiatop, and the skin prick test (SPT) are commonly used to diagnose atopic diseases. However, no large study has ever been done to test their diagnostic efficiency. We studied the diagnostic value of these three atopic markers in 8329 well-randomized adults from the Swiss Population Registry. The prevalence of current allergic asthma (CAA) was 1.8% and of current allergic rhinitis (CAR) 16.3%. The prevalences of positive Phadiatop, positive SPT (at least, one out of eight SPT to common aeroallergens with a wheal of > or = 3 mm), and positive total IgE (IgE > or = 100 kU/l) were 29, 23, and 23%, respectively. To diagnose CAA and CAR, the sensitivity of Phadiatop was significantly higher than that of SPT (72.5% vs 65.4%, 77.1% vs 68.4% respectively; P < 0.01 and < 0.001) and IgE (72.5% vs 56.9%, 77.1% vs 43.9%, respectively; both P < 0.001). The sensitivity of SPT was significantly higher (68.4% vs 43.9% P < 0.001) than that of IgE to diagnose CAR. When CAA and CAR were excluded, the SPT specificity was significantly higher than that of Phadiatop (77.8% vs 71.9% and 85.9% vs 80.5%, respectively; both P < 0.001): when CAR was excluded, SPT was significantly higher than IgE (85.9 vs 81.4%; P < 0.001). SPT had significantly the best positive predictive value for CAA (5.2% for SPT vs 4.6% for both IgE and Phadiatop; both P < 0.001) and CAR (48.7% for SPT vs 43.5% for Phadiatop and 31.6% for IgE; both P < 0.001). The three markers of atopy had roughly the same negative predictive value (NPV) for CAA, but IgE had a significantly lower NPV for CAR than SPT and Phadiatop (88.1% vs 93.3% and 94.7%, respectively; both P < 0.001). The diagnostic efficiency of SPT was significantly higher than that of Phadiatop (83.1% vs 79.9% and 77.6 vs 71.9%, respectively; both P < 0.001) to diagnose CAR and CAA. IgE and SPT had equal efficiency (77.6%), which was significantly higher than that of Phadiatop, to diagnose CAA (71.9%; both P < 0.001). In conclusion, SPT have the best positive predictive value and the best efficiency to diagnose respiratory atopic diseases. Furthermore, SPT give information on sensitivity to individual allergens and should therefore be used primarily by clinicians to assess respiratory allergic diseases. Moreover, they are cheaper and provide immediate, educational information for both patient and physician. 相似文献
140.
Carbamazepine (CAS 298-46-4), an iminostilbene derivative and a structural congener of the tricyclic antidepressant drugs, has been used in the treatment of epileptic seizures since 1963. The bioavailability/bioequivalence of a carbamazepine sustained release formulation (Timonil retard) was compared with a reference formulation in an open 2-period crossover study in 21 healthy male volunteers (including 1 drop-out) after multiple dose administration. During a run-in phase of 6 days the daily dose was gradually increased from 100 to 400 mg. On days 9 to 15, either the test or the reference formulation was administered twice daily, followed by a switch of preparation for a further 7 days of treatment (days 16 to 22). On the pharmacokinetic profiling days 15 and 22 blood samples were drawn over a 24-h period. In addition, blood samples were withdrawn before morning administrations for determination of carbamazepine and carbamazepine-10,11-epoxide trough values. Plasma concentrations of carbamazepine and its metabolite carbamazepine-10,11-epoxide were determined using a specific and sensitive HPLC method with UV detection. The results showed that autoinduction of carbamazepine metabolism under the chosen dosage regimen was complete within 14 days after start of treatment and that the criteria for bioequivalence were met. The 90% confidence intervals of all ratios were included by a range of 80-125% (AUC0-12: 103-120; AUC12-24: 105-119; Cmax0-12: 104-118; Cmax12-24: 104-118). During the study, 12 subjects experienced a total of 24 adverse events with mild to moderate intensity. Due to a significant increase of liver enzyme activity in serum during the course of the study, one subject was excluded from further study participation. There were no serious adverse events. It was concluded that the test formulation is bioequivalent to the reference formulation with respect to rate and extent of absorption. 相似文献