全文获取类型
收费全文 | 584篇 |
免费 | 1篇 |
专业分类
化学工业 | 3篇 |
轻工业 | 2篇 |
无线电 | 1篇 |
一般工业技术 | 1篇 |
冶金工业 | 577篇 |
自动化技术 | 1篇 |
出版年
2018年 | 1篇 |
2017年 | 1篇 |
2011年 | 1篇 |
2010年 | 1篇 |
2009年 | 1篇 |
2006年 | 1篇 |
2003年 | 2篇 |
1999年 | 4篇 |
1998年 | 152篇 |
1997年 | 95篇 |
1996年 | 70篇 |
1995年 | 35篇 |
1994年 | 26篇 |
1993年 | 31篇 |
1992年 | 12篇 |
1991年 | 4篇 |
1990年 | 6篇 |
1989年 | 4篇 |
1988年 | 5篇 |
1987年 | 4篇 |
1986年 | 3篇 |
1985年 | 9篇 |
1982年 | 4篇 |
1981年 | 5篇 |
1980年 | 2篇 |
1978年 | 4篇 |
1977年 | 39篇 |
1976年 | 61篇 |
1975年 | 1篇 |
1972年 | 1篇 |
排序方式: 共有585条查询结果,搜索用时 15 毫秒
61.
OT Titarenko NV Soldatova VS Barinov NA Prokhorovich ME D''iakova 《Canadian Metallurgical Quarterly》1998,18(2):25-27
Improved hemodynamics and blood flow have been reported in patients with IABPs who experience cardiopulmonary arrest and require CPR. The following research questions, however, remain unanswered: Is there a more effective method of using IABP to prevent cardiac arrest and the need for CPR? Is the timing of balloon inflation and deflation the same for patients undergoing CPR as it is for patients who do not require CPR? Would earlier or later inflation or deflation further enhance cerebral or systemic blood flow? What are the most effective ways for healthcare staff to maintain competency skills in CPR in patients with IABPs? 相似文献
62.
SA Honda AP Goldstein T Morita C Sugiyama L Cody CN Rios NV Bhagavan 《Canadian Metallurgical Quarterly》1996,42(11):1785-1788
In light of recent studies showing that prostate-specific antigen (PSA) complexes with certain blood proteins, we studied the effects of acute-phase reactants and alpha 2-macroglobulin (A2MG) on serum concentrations of PSA. Serum samples were obtained from 419 men admitted to an acute-care facility. Various acute-phase reactants-including C-reactive protein, alpha 1-acid glycoprotein, alpha 1-antitrypsin, and alpha 1-antichymotrypsin-and A2MG were measured with a Beckman Array analyzer in parallel with determinations of PSA concentrations by two methods, the Hybritech Tandem RIA and the Abbott PSA IMx. Evaluation by Spearman rank correlation revealed a significant negative correlation of A2MG with PSA values (P < 0.01) and (as expected) a positive correlation of age with PSA values (P < 0.001). The former correlation suggests the possibility that patients with high serum concentrations of A2MG may give falsely decreased results for PSA concentrations in serum. 相似文献
63.
EL Vodovozova GP Gayenko VI Razinkov EY Korchagina NV Bovin JG Molotkovsky 《Canadian Metallurgical Quarterly》1998,44(3):543-553
The overexpression of lectins by malignant cells was applied for in vitro targeting of liposomes equipped with a saccharide vector and loaded in the lipid phase with a lipid derivative of anticancer agent sarcolysine. The lectin specificity of human leukemia HL-60 and human lung adenocarcinoma ACL cells was revealed by tests with fluorescein-labeled sugar probes. With the help of fluorescent lipid dye it was shown that active saccharide ligands increased the level of the vectored liposome binding to malignant cells by 50-80% as compared to liposomes without vector or with inactive one. The degree of liposome/cell membrane fusion was monitored fluorometrically and was shown to be complete and independent of the vectors. The targeted drug-loaded liposomes had the cytotoxic activity 2-4 times higher as compared to the vector-free ones. 相似文献
64.
IN Klots SA Rezikian LV Indzhiia VG Chalian NV Me?shvili BA Lapin 《Canadian Metallurgical Quarterly》1998,(3):67-68
To form the colony of monkeys, free of herpes B virus, the serological study was made with the aim of finding out the carriers of this virus. 482 rhesus macaques (Macaca mulatta) from the Adler monkey house were examined for the presence of antibodies to herpes B virus by the method of point immunoblotting with the use of Herpes virus simiae as antigen. The contamination of monkeys in different open-air cages varied from 12.5% to 92%. In different age groups, it was 27% in nonpubescent monkeys (49 out of 182 animals), 55% in adolescent monkeys (55 out of 99), 73% in pubescent monkeys (131 out of 179) and 95% in monkeys over 15 years (21 out of 22 animals). 9 groups of rhesus macaques (comprising altogether 81 animals), free of herpes B virus, were selected. The monkeys were repeatedly tested within a year; after that 10-17% of formerly seronegative monkeys were rejected and removed from the selected group. After the third testing 2.5% more of the animals were found to have seroconversion. The colony of rhesus macaques thus created exists at present. The animals are subjected to constant serological observation. 相似文献
65.
VN Vecherko PP Konoplia FA Gredzhev AD Zubov NV Momot 《Canadian Metallurgical Quarterly》1995,154(3):42-44
Under analysis is an experience with examining and treatment of 167 patients with focal lesions of the liver using computed tomography. Percutaneous transhepatic puncture and draining the hepatic abscesses and cysts under control of computed tomography is an independent method of treatment used in 53 patients. The technique of performing the puncture and drainage is described. Specific features of surgical treatment of focal lesions of the liver are described. Decompression of bile ducts in the postoperative period is shown to be necessary. A conclusion is made about high efficiency of computed tomography in diagnosis and treatment of focal lesions of the liver. 相似文献
66.
STUDY OBJECTIVE: To estimate the financial costs incurred by outpatient surgical centers in managing postoperative nausea and vomiting (PONV). DESIGN: Prospective, observational study. SETTING: 6 hospital-based outpatient surgery centers. PATIENTS: 211 adult patients undergoing outpatient surgery for laparoscopy, dilatation and curettage, knee arthroscopy, or hernia repair. MEASUREMENTS AND MAIN RESULTS: Of the 211 patients studied, 34 experienced PONV in the recovery room. For those patients experiencing PONV, personnel, supply, and drug costs for management of this condition averaged $14.94 per patient. In addition, PONV increased the centers' operating costs by delaying patient discharge by an average of 24 minutes. A minimum estimate of this cost, based on nurses' wage rates, was $7.12. This estimate is appropriate only for short-run considerations in outpatient surgery centers that operate at low capacity. An appropriate valuation for long-run considerations and for centers operating near capacity is based on the revenue that centers lose as a result of extended stays. Lost revenue was estimated to be $415 per patient experiencing PONV. CONCLUSIONS: PONV substantially increases the costs incurred by outpatient surgical centers. 相似文献
67.
68.
69.
KS Ternovo? TN Selezneva AV Akleev IA Pashkov LA Noskin NV Klopov VA Noskin NF Starodub 《Canadian Metallurgical Quarterly》1998,70(3):81-85
The effects of an alternative chelation program in thalassemic patients with severe iron overload are investigated. The schedule of treatment, feasible at home, consists in the administration of deferoxamine intravenously (100 mg/kg/die 8 hours 10 days a month), followed by 50 mg/kg/die subcutaneously in the remaining 20 days of the month. The results in 34 patients who underwent this program over 8 months are reported. After intensive chelation therapy serum ferritin and transaminase levels were significantly lower, and daily urinary iron excretion values were significantly higher when compared to the levels observed before the treatment. After the period of study, echocardiography revealed an ejection fraction (EF) significantly higher in 15 out of 34 cardiopathic patients. In conclusion, the alternative chelation program is effective in reducing iron overload of thalassemic patients, protecting them also against cardiac disease. 相似文献
70.