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31.
In this paper, we use Leggett-Williams multiple fixed point theorem to obtain different sufficient conditions for the existence of at least three nonnegative periodic solutions of the first order functional differential equation of the form
y′(t)=-a(t)y(t)+λf(t,y(h(t))). 相似文献
32.
Kalpana Luthra Suman Vasisht Shivani Chhabra K. R. Raju D. P. Agarwal S. C. Manchanda L. M. Srivastava 《Indian journal of clinical biochemistry : IJCB》1998,13(1):12-19
Lipoprotein Lp(a) excess has been identified as a powerful predictor of premature atherosclerotic vascular diseases. To evaluate
this in a North-Indian population, 130 CAD patients and 130 controls were analyzed. The size of the apo(a) phenotypic isoforms
was inversely proportional to Lp(a) concentrations. The mean concentration of Lp(a) in the CAD patients was 42±34 mg/dl whereas
in the normal subjects it was much lower, 27±27 mg/dl. 157 subjects out of the total 260 subjects showed plasma levels of
>20mg/dl. The frequency of high Lp(a) levels was much higher in patients(73%) than controls (43%). These data suggest (1)
that there is heterogeneity of the Lp(a) polymorphism, (2) Higher Lp(a) levels were found in patients than in the controls,
(3) Patients showed 1.5 fold increase in Lp(a) levels as compared to the controls. We conclude that low molecular weight apo(a)
isoforms are significantly associated with increased risk of CAD in the North-Indian population. 相似文献
33.
A. P. Jain A. Mohan O. P. Gupta U. N. Jajoo S. P. Kalantri L. M. Srivastava 《Indian journal of clinical biochemistry : IJCB》1998,13(2):119-122
In view of sufficient body of evidence to substantiate the role of free radical mediated oxidative injury in myocardial infarction
(M.I.), the utility of exogenous supplementation with antioxidant substance, vitamin E was studied. Forty patients of acute
myocardial infarction were divided into two equal groups, one who received vitamin E and the other who did not. Plasma MDA
levels showed a reduction in patients of M.I. who received vitamin E as well as in those who did not, however, the decrease
was significantly more in the vitamin E treated subgroup. 相似文献
34.
35.
S. M. Srivastava 《Resonance》2001,6(7):29-41
This is a two-part article giving a brief introduction to mathematical logic. It will culminate in the so-called completeness theorem of Kurt Gödel, which will be proved in the second part. 相似文献
36.
S M Srivastava 《Resonance》2007,12(5):71-84
After presenting the technique developed by G?del to examine questions about a theory such as Number Theory, Set Theory by
the theory itself, we present the surprising Incompleteness Theorems of G?del. 相似文献
37.
Janardan Krishna Yadav Deepika Chandra Verma Srinivas Jangirala Shashi Kant Srivastava 《The Journal of High Technology Management Research》2021,32(1):100404
The concept of smart tourism remains fuzzy when it comes to practice because of the lack of clarity on the roles and responsibilities of stakeholders in addition to complex institutional ecosystem that exist within the tourism industry. Further, trust and safety of the data generated due to the advancement of smart tourism in varied institutional arrangements pose huge challenges. Extant literature proposes that the application of decentralized ledger promises possible solutions to most of these problems due to the inherent features of the Blockchain technology. This suggestion raises two practical questions. First, does the sophisticated additional layer adds complexity to its practical application? Second, will the suggested solutions really lead to a win-win for all the stakeholders involved? In this study, we use Ostrom's action arena to examine the exchanges (information, contractual and monetary) between various stakeholders in a BCT enabled smart tourism of a Blockchain enabled tourism industry to answer these two questions. 相似文献
38.
Vibha Singh Neena Srivastava Priyanka Srivastava Rama Devi Mittal 《Indian journal of clinical biochemistry : IJCB》2013,28(3):259-264
Chemokine are small, inducible pro-inflammatory cytokines involved in many biological processes, such as migration of leukocytes, atherosclerosis, angiogenesis, tumor growth, and metastasis. Chemokine are also known to influence tumor cell’s activity. Specifically, tumor cells express chemokine receptors in a non random manner suggesting a role of chemokine in metastatic destination of tumor cells. The present study was conducted to determine distribution of (Chemokine receptor 2) CCR2 V64I, Chemokine ligand 2 CCL2 I/D, and CCL2 2518 A>G gene polymorphisms in North Indian population and compare with different populations globally. Polymerase chain reaction (PCR)-based analysis was conducted in 200 normal healthy individuals of similar ethnicity. Allelic frequencies in wild type (GG) of CCR2 V64I G>A were 63 % G; CCL2 I/D 42 % II; CCL2 2518 A>G 40.5 % A. The minor variant allele frequency in our population was as follows: 19.5 % for CCR2 V64I, 35.5 % for CCL2 I/D, 35.3 % for CCL2 2518 A>G. We further compared frequency distribution for these genes with various published studies in different ethnicity. Our results suggested that frequency in chemokine genes exhibit distinctive pattern in India that could be attributed to ethnicity variation. This could assist in high-risk screening of human exposed to environmental carcinogens and cancer predisposition in different ethnic groups. Thus, they signify an impact of ethnicity and provide a basis for future epidemiological and clinical studies. 相似文献
39.
40.
The current epidemic affecting Indians is coronary artery disease (CAD), and is currently one of the most common causes of mortality and morbidity in developed and developing countries. The higher rate of CAD in Indians, as compared to people of other ethnic origin, may indicate a possible genetic susceptibility. Hence, Lp(a), an independent genetic risk marker for atherosclerosis and cardiovascular disease assumes great importance. Lp(a), an atherogenic lipoprotein, contains a cholesterol rich LDL particle, one molecule of apolipoprotein B-100 and a unique protein, apolipoprotein (a) which distinguishes it from LDL. Apo(a) is highly polymorphic and an inverse relationship between Lp(a) concentration and apo(a) isoform size has been observed. This is genetically controlled suggesting a functional diversity among the apo(a) isoforms. The LPA gene codes for apo(a) whose genetic heterogeneity is due to variations in its number of kringles. The exact pathogenic mechanism of Lp(a) is still not completely elucidated, but the structural homology of Lp(a) with LDL and plasmin is possibly responsible for its acting as a link between atherosclerosis and thrombosis. Upper limits of normal Lp(a) levels have not been defined for the Indian population. A cut off limit of 20 mg/dL has been suggested while for the Caucasian population it is 30 mg/dL. Though a variety of assays are available for its measurement, standardization of the analytical method is highly complicated as a majority of the methods are affected by the heterogeneity in apo(a) size. No therapeutic drug selectively targets Lp(a) but recently, new modifiers of apo(a) synthesis are being considered. 相似文献