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61.
Abdul Wahab Syed Aleem Jan Abdur Rauf Zia ur Rehman Zahid Khan Aftab Ahmed Fatima Syed Sher Zaman Safi Hamayun Khan Muhammad Imran 《Journal of Zhejiang University. Science. B》2018,19(2):120-129
Objective
Scandix pecten-veneris L. is a less studied wild edible herb and is considered an extinct plant species in many parts of the world. This study was designed to evaluate its phytochemical composition and biological potential of S. pecten-veneris L.Methods
Phytochemicals including alkaloids, flavonoids, polyphenols, and tannins were determined in extracts of S. pecten-veneris. Antioxidant activity was determined using 2,2-diphenyl-1-picrylhydrazyl (DPPH), while reducing power was tested by ferric reducing/antioxidant power (FRAP) assay. Antimicrobial activity against seven bacterial and four fungal strains was evaluated using agar well diffusion assay. Enzymes inhibition study was performed for urease, phosphodiesterase-I, and catalase-II.Results
S. pecten-veneris showed moderate antiradical activity and reducing potential of hydroxyl radicals to about 20% of the initial value. The antioxidant activity of various extracts of S. pecten-veneris showed a linear correlation with total phenolic contents in the order of water>n-butanol>chloroform>ethyl acetate>methanol extracts. S. pecten-veneris leaves showed the highest inhibitory activity against Staphylococcus aureus while the highest antifungal activity was observed against Candida albicans. The plant extract was most potent against urease enzymes but showed moderate activity against phosphodiestrase-I and carbonic anhydrase-II.Conclusions
Our data demonstrate that in addition to its culinary uses, S. pecten-veneris has good medicinal potential and hence could be used for treating some specific health ailments.62.
Syed Mazher Husain M. P. J. S. Anandaraj 《Indian journal of clinical biochemistry : IJCB》1995,10(2):122-125
Hemoglobin E (beta-26Glutamic acid→Lysine) is the second most prevalent hemoglobin variant in the world. 293 blood samples from cases referred from several hospitals in the region of Andhra Pradesh were screened for the detection of hemoglobinopathies. Four samples were found to be in heterozygous state for Hb E condition. Mutation in two of these heterozygotes was analysed using a 722 base pair (bp) amplified DNA fragment from beta-globin gene and restriction enzyme Mnl 1. A 232bp DNA fragment was found to be associated with the Hb E mutation. 相似文献
63.
M. Shafi Dar A. A. Pandith A. S. Sameer M. Sultan A. Yousuf Syed Mudassar 《Indian journal of clinical biochemistry : IJCB》2010,25(2):208-212
Hypertension is the most important public health problem in developing countries and one of the major risk factors for cardiovascular
diseases, and it has been reported that hypertension is in part an inflammatory disorder and several workers have reported
elevated levels of CRP in hypertensive individuals. The main aim of the present study was to evaluate the association between
blood pressure and serum CRP levels across the range of blood pressure categories including prehypertension. A total of 104
patients and 63 control subjects were included in the present study. The level of CRP in the serum samples was estimated by
a high sensitivity immunoturbidometric assay. Standard unpaired student’s ‘t’ test was used for comparison of hs-CRP levels
between hypertensive patients and normotensive control subjects and between patient groups with different grades of hypertension
and different durations of hypertensive histories. The mean serum hs-CRP level in hypertensive patients was 3.26 mg/L compared
with 1.36 mg/L among normotensive control subjects (P<0.001). On comparison with normotensive control subjects, the hs-CRP
levels vary significantly both with grades and duration of hypertension, with most significant difference found in patients
with prehypertension (P<0.001), followed by Stage-I (P=0.01) and Stage-II(P=0.02) hypertensives. Significant difference in
hs-CRP levels was also found in patients with shorter duration of hypertensive history (≤ 1year) when compared with those
with ≥5 years of hypertensive history (P<0.01). Our study reveals a graded association between blood pressure and CRP elevation
in people with hypertension. Individuals with prehypertension or with shorter duration of hypertension (≤1 Year) had significantly
a greater likelihood of CRP elevation in comparison to chronic stage-I or stage-II hypertensives. 相似文献
64.
65.
Muhammad Rehan Muhammad Tufail Shakeel Ahmed 《Journal of The Franklin Institute》2021,358(12):6217-6239
This paper deals with the leaderless consensus controller design for nonlinear multi-agent systems (MASs) subject to the input saturation nonlinearity by using an event-triggered (ET) mechanism. An adaptive ET scheme has been established with variable threshold parameter for attaining an efficient control bandwidth. Linear parameter varying (LPV) formulation and region of stability investigation for dealing with the inherent nonlinearity and input saturation, respectively, are focused in the study. A consensus controller design condition has been formulated to ensure the regional stability, to determine the consensus protocol gains, to choose the parameters of ET mechanism, and to select an appropriate adaptation law for ET control. Elimination of Zeno behavior, based on nonlinearity bounds, for the adaptive ET mechanism has been ensured through a rigorous analysis. In contrast to excising methods, a directed communication topology, adaptive ET mechanism, and removal of Zeno behavior as well as elimination of the windup effect of saturation have been considered in our work. A simulation study has been provided for six robotic agents and comparison results with the existing method are revealed. 相似文献
66.
This paper addresses the face recognition problem through a modification of the Fuzzy Fisherface classification method. In conventional methods, the relationship of each face to a class is assumed to be crisp. The Fuzzy Fisherface method introduces a gradual level of assignment of each face pattern to a class, using a membership grading based upon the K-Nearest Neighbor (KNN) algorithm. This method was further modified by incorporating the membership grade of each face pattern into the calculation of the between-class and within-class scatter matrices, termed as Complete Fuzzy LDA (CFLDA). The present work aims at improving the assignment of class membership by improving the parameters of the membership functions. A genetic algorithm is employed to optimize these parameters by searching the parameter space. Furthermore, the genetic algorithm is used to find the optimal number of nearest neighbors to be considered during the training phase. The experiments were performed on the Olivetti Research Laboratory (ORL) face image database and the results show consistent improvement in the recognition rate when compared to the results from other techniques applied on the same database and reported in literature. 相似文献
67.
Goodwin R Haque S Hassan SB Dhanoa A 《Public understanding of science (Bristol, England)》2011,20(4):477-490
Novel influenza viruses are seen, internationally, as posing considerable health challenges, but public responses to such viruses are often rooted in cultural representations of disease and risk. However, little research has been conducted in locations associated with the origin of a pandemic. We examined representations and risk perceptions associated with swine flu amongst 120 Malaysian pig farmers. Thirty-seven per cent of respondents felt at particular risk of infection, two-thirds were somewhat or very concerned about being infected. Those respondents who were the most anxious believed particular societal "out-groups" (homosexuals, the homeless and prostitutes) to be at higher infection risk. Although few (4%) reported direct discrimination, 46% claimed friends had avoided them since the swine flu outbreak. Findings are discussed in the context of evolutionary, social representations and terror management theories of response to pandemic threat. 相似文献
68.
Nostalgic Emotional Appeals for Smoking Prevention 总被引：1，自引：1，他引：0
Nostalgia-evoking messages are used to promote consumer products, but their use for encouraging healthy behaviors is not well understood. This study examines the use of nostalgia as an emotional appeal to influence attitudes and reduce smoking behavior. The study hypothesized that exposure to a nostalgic public service announcement (PSA) will result in (a) more negative attitude toward smoking; and (b) increased intention to limit smoking, relative to a control. Participants exposed to the nostalgia-evoking PSA expressed more negative attitudes toward smoking and stronger intentions to limit smoking than did participants exposed to nonnostalgic messages. The findings suggest nostalgic appeals as a promising strategy for smoking prevention messages. 相似文献
69.
Shupei Yuan Syed A. Hussain Kayla D. Hales Shelia R. Cotten 《Educational gerontology》2013,39(3):163-174
ABSTRACTWith the development of information and communication technologies (ICTs), there are increasingly more Internet-based communication methods available for older adults besides traditional methods (e.g., in-person or landline phone). However, older adults’ preferred communication methods remain under-investigated. The purpose of this study is to explore the communication preferences and patterns of older adults in the United States, with emphasis on technologically-mediated environments. In this study, 17 semistructured interviews were conducted with participants from a midwestern state in the United States. The goal was to examine older adults’ communication patterns and preferences with family members and friends, as well as their views about the impacts of modern technology on communication. Three themes (communication preferences and reasons, communication barriers, and the impacts of technology) were generated from the interviews. The findings showed that although face-to-face communication is the most preferred method, telephone communication is the most commonly adopted method. Interviewees also shared different opinions regarding Internet-based communication. The current study illustrated the importance of understanding the preferences and patterns of older adults’ communication needs and desires. 相似文献
70.
The Community College Leadership Consortium is building the Bellwether Coalition for Instructional Leadership toward the development of a voluntary system of accountability for community colleges. In response to the Spellings Commission's national call for accountability in higher education, the consortium and its partners convened an Independent Policy Forum at the 2008 Community College Futures Assembly in Orlando, Florida. The Independent Policy Forum began to develop a set of recommendations to be communicated to the American Association of Community Colleges (AACC) during its 2009 annual meeting. Recommendations put forth by the forum will contain the founding principles for the nascent voluntary system of accountability for community colleges. 相似文献