全文获取类型
收费全文 | 556篇 |
免费 | 2篇 |
国内免费 | 1篇 |
专业分类
教育 | 249篇 |
科学研究 | 265篇 |
各国文化 | 3篇 |
体育 | 2篇 |
文化理论 | 3篇 |
信息传播 | 37篇 |
出版年
2023年 | 2篇 |
2022年 | 7篇 |
2021年 | 19篇 |
2020年 | 5篇 |
2019年 | 10篇 |
2018年 | 37篇 |
2017年 | 25篇 |
2016年 | 24篇 |
2015年 | 30篇 |
2014年 | 30篇 |
2013年 | 59篇 |
2012年 | 17篇 |
2011年 | 19篇 |
2010年 | 24篇 |
2009年 | 29篇 |
2008年 | 25篇 |
2007年 | 17篇 |
2006年 | 29篇 |
2005年 | 21篇 |
2004年 | 14篇 |
2003年 | 24篇 |
2002年 | 11篇 |
2001年 | 9篇 |
2000年 | 8篇 |
1999年 | 6篇 |
1998年 | 11篇 |
1997年 | 6篇 |
1996年 | 4篇 |
1995年 | 6篇 |
1994年 | 4篇 |
1993年 | 5篇 |
1992年 | 5篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1989年 | 2篇 |
1987年 | 1篇 |
1986年 | 2篇 |
1985年 | 1篇 |
1983年 | 2篇 |
1979年 | 1篇 |
1977年 | 1篇 |
1976年 | 2篇 |
1975年 | 1篇 |
1973年 | 1篇 |
1962年 | 1篇 |
排序方式: 共有559条查询结果,搜索用时 15 毫秒
101.
The Cult of Our Lady of Guadalupe, the product of appropriations authored by both the Aztecs and the Roman Catholic Church, has served as a tool of empowerment, dominion, and accommodation. Central to this contested cult is an indigenous reinvention of the Virgin Mary that is simultaneously index, icon, and symbol. This study demonstrates the difficulties in attempting to selectively appropriate the desirable features of such a sign while excluding those deemed undesirable. In attempting to appropriate certain features of the Virgin it deemed desirable, the authors argue, the Church also annexed aspects of the Aztec religious tradition at odds with the teachings of Catholicism. While Catholicism's attempt to co‐opt this Virgin extended the influence of the institutional Catholic Church, the authors suggest, it also undermined the integrity of the faith the Church promotes by fostering a form of popular Catholicism contrary to the teachings and practices of orthodox Catholicism. This study is grounded in data obtained through interviews conducted with pilgrims in the vicinity of the Basilica of Our Lady of Guadalupe immediately prior to, during, and after the Virgin's annual feastday (December 12). The authors also draw upon anthropological, historical, and religious studies scholarship to make sense of the pilgrims’ beliefs and place them within the broader historical and religious contexts in which they operate. 相似文献
102.
Both (a) in-school factors such as over-focus on academic performance, absence of uniform, and corporal punishment, and (b) out-of school factors such as caring for ailing parents, child labour, etc., hinder participation of orphan and vulnerable children (OVC) in Free Primary Education (FPE) system in Nyanza Province, Kenya. In this context Concern Worldwide Kenya undertook an appreciative capacity building approach and appropriately positioned District Education Office (DEO) of the Ministry of Education and local civil society organisations (CSOs) to address in-school and out-of-school factors, respectively, to ensure quality education for OVC. The outcome of the programme is promising and has demonstrated the need for greater cooperation between CSOs and the government to develop creative strategies in overcoming the causes of marginalisation within the contexts of the growing AIDS pandemic and poverty in Kenya. 相似文献
103.
Online open source software platforms, such as Sourceforge.net, play a vital role in creating an ecosystem that enables the creation and growth of open source projects. However, there is little research exploring the interactions between open source stakeholders and the platform. We believe that the sustainability of the platform crucially depends on financial incentives. While platforms can obtain these incentives through multiple means, in this paper we focus on one form of financial incentives—voluntary monetary donations by open source community members. We report findings from two empirical studies that examine factors that impact donations. Study 1 investigates the factors that cause some community members to donate and not others. We find that the decision to donate is impacted by relational commitment with open source software platform, donation to projects and accepting donations from others. Study 2 examines what drives the level of donation. We find that the length of association with the platform and relational commitment affects donation levels. 相似文献
104.
Subir Kumar Das L. Dhanya Sowmya Varadhan Sukhes Mukherjee D. M. Vasudevan 《Indian journal of clinical biochemistry : IJCB》2009,24(3):301-306
Alcohol consumption and health outcomes are complex and multidimensional. Ethanol (1.6g / kg body weight/ day) exposure initially
affects liver function followed by renal function of 16–18 week-old male albino rats of Wistar strain weighing 200–220 g.
Chronic ethanol ingestion increased in thiobarbituric acid reactive substances level and glutathione s-transferase activity;
while decreased reduced gluatathione content and activities of catalase, glutathione peroxidase and glutathione reductase
in a time dependent manner in the hemolysate. Though superoxide dismutase activity increased initially might be due to adaptive
response, but decreased later. Elevation of serum nitrite level and transforming growth factor-b1 activity indicated that long-term ethanol consumption may cause hepatic fibrosis and can elicit pro-angiogenic factors. However,
no alteration in vascular endothelial growth factor-C activity indicated that ethanol consumption is not associated with lymphangiogenesis.
Therefore, we conclude that long-term ethanol-induced toxicity is linked to an oxidative stress, which may aggravate to fibrosis
and elevate pro-angiogenic factors, but not associated with lymphangiogenesis. 相似文献
105.
Vinita Ailani R. C. Gupta Sunil Kumar Gupta Kapil Gupta 《Indian journal of clinical biochemistry : IJCB》2009,24(4):426-429
This study was conducted to find out the level of oxidative stress and effect of supplementation of vitamin C, D and Calcium
on levels of SOD, serum and urinary fluoride in children residing in endemic fluorosis area. For this the fluoride belt of
Jaipur district was selected. The parameters selected were Super oxide dismutase, serum fluoride and urinary fluoride. The
study was conducted on one hundred children, selected from four areas (25 from each area) consuming water containing 1.2,
2.4, 5.6 and 13.6 mg/l of fluoride. Drinking water fluoride, serum and urinary fluoride were measured by Ion selective electrode
method. Serum SOD by Xanthine oxidase method using kit of Ransod (kit cat. No. SD125). The post treatment values showed a
significant reduction in serum fluoride and SOD. Urinary fluoride levels increased significantly in post treatment stage.
The results revealed a normal SOD levels in all groups but an increasing trend was observed with increasing fluoride concentration.
Treatment with Calcium, Vitamin D and Vitamin C showed a significant reduction in serum fluoride and SOD and increase in urinary
fluoride. A high positive correlation between pretreatment and post treatment group was observed in serum fluoride, SOD and
urinary fluoride (P < 0.05). The study indicated an increasing oxidative stress in cases of fluorosis with increasing drinking
water fluoride concentration. Treatment with Calcium, Vitamin D and Vitamin C resulted a significant reduction in serum fluoride
and SOD and increase in urinary fluoride. 相似文献
106.
Subir Kumar Das Sukhes Mukherjee Gaurav Pandey V. Balakrishnan D. M. Vasudevan 《Indian journal of clinical biochemistry : IJCB》2009,24(2):155-158
Non-alcoholic fatty liver disease and its more aggressive form, non-alcoholic steatohepatitis are entities that are becoming
more and more interesting to the medical community in general. A total of 93 Non-alcoholic fatty liver disease patients (64
male and 29 female) within the age range between 28 to 63 years were studied. All of them showed elevated alanine aminotransferase
level (104.07 ± 56.04). Aspartate aminotransferase level (58.13 ± 31.96) was elevated more than its normal level in 82% cases
and AST to ALT ratio was found 0.59 ± 0.26. Predisposing factors were diabetes mellitus (37%), obesity (13%) and hyperlipidemia
(41%). In addition, 32% of the subjects were overweight.18% of the patients had elevated serum bilirubin. Our findings recommend
a lower cutoff value than suggested by the World Health Organization for overweight and obesity among this racial-ethnic group. 相似文献
107.
108.
Hemant Kumar Ashok Kumar Poonam Kumari N. B. Tulsani 《Indian journal of clinical biochemistry : IJCB》2000,15(2):124-127
We have developed a biostrip for determination of urea in serum. The test strip is based on enzymatic assay where urease has
been immobilized on the chromatographic paper along with chromogen, phenol red. The chromogen is easily soluble in water and
does not require other components for the color change. Serum urea reacts with urease and water to liberate ammonia and carbon
dioxide. The liberated ammonia changes the pH of the reaction medium, which is monitored by the chromogen phenol red. A single
step working reagent strip has been developed and the reaction is completed within 50 seconds at room temperature. With this
test strip urea concentration is measured in serum as low as 0.15 g/L. The speed and convenience of determining urea in serum
by this strip instantly makes it well suited for individuals, physicians and emergency centres. 相似文献
109.
Rohit Kumar Gupta Sagar Jayantilal Dholariya Smita Kaushik S. K. Gupta Reva Tripathi Shyam Lata Jain 《Indian journal of clinical biochemistry : IJCB》2021,36(2):221
Ovarian cancer has been emerged as a most common and lethal gynecological malignancy in India. High serum insulin and low adiponectin have been associated with increased risk of ovarian cancer. But their role in development of ovarian cancer is conflicting and little evidence is available. We aimed to evaluate blood levels of insulin and adiponectin in epithelial ovarian cancer (EOC) patients and their association with the risk to develop EOC. The study included following three groups; Group 1: fifty cases of cytohistopathologically confirmed cases of EOC, Group 2: fifty age matched cases of benign ovarian conditions and Group 3: fifty ages matched healthy controls with no evidence of any benign or malignant ovarian pathology as ruled out by clinical examination and relevant investigations. Cytohistopathologically confirmed and newly diagnosed cases of EOC and benign ovarian cancer were included in this study. The median value of fasting serum insulin was significantly high (15.0 µlU/ml, P = 0.02) and adiponectin were significantly low (5.1 µg/ml, P < 0.001) in ovarian cancer patients compared to benign ovarian tumors and healthy controls group. A significant increase risk of ovarian cancer was found in high tertile (≥ 18.7 µlU/ml) of serum insulin level (OR = 2.7; 95% CI = 1.00–6.67, P = 0.04) and lower tertile (≤ 5.45 µg/ml) of adiponectin level (OR = 3.2; 95% CI = 1.10–9.71, P = 0.03). High serum insulin level and low adiponectin levels were significantly associated with increased risk for development of ovarian cancer. 相似文献
110.