Scandix pecten-veneris L.的植物素、生物学潜力及酶抑制活性研究（英文）

目的:本研究旨在测定Scandix pecten-veneris L.的植物素和评价其生物学潜力。方法:测定S.pecten-veneris提取物中植物素的含量,包括生物碱、黄酮、多酚和单宁。使用2,2-二苯基-1-苦肼基(DPPH)测定抗氧化活性;同时通过铁还原/抗氧化能力(FRAP)测定还原能力;使用琼脂扩散测定法评价对七种细菌和四种真菌菌株的抗微生物活性。同时,对脲酶、磷酸二酯酶-Ⅰ和过氧化氢酶-Ⅱ进行酶抑制研究。结论:沙门氏菌显示出适度的抗自由基活性;羟基自由基的潜能降至初始值的20%左右。S.pectenveneris多种提取物的抗氧化活性与总酚含量呈线性相关。S.pecten-veneris叶对金黄色葡萄球菌表现出最高的抑制活性;对白色念珠菌表现出到最高的抗真菌活性。植物提取物对脲酶的活性最有效;对磷酸二酯酶-Ⅰ和碳酸酐酶-Ⅱ显示出中等活性。结果表明,S.pecten-veneris具有良好的药用潜力,可用于治疗一些特定的疾病。     

The effects of group stereotypes on adolescents' reasoning about peer retribution

This study examined the effects of negative group stereotypes on adolescents' reasoning about peer retribution. The sample of adolescents was drawn from central and northern Israel and consisted of 2,604 Arab and Jewish students (ages 13-17; grades 7-11). A quasi-experimental, between-subject design was used, in which the students in each grade were assigned randomly to 1 of 4 peer retribution scenarios. The findings provide evidence that Arab and Jewish students have stereotypes about one another and that in-group bias affected their approval and reasoning about peer retribution only in specific situations. This inquiry provides evidence that it was the number of justifications endorsed within a specific domain that distinguished Arab and Jewish respondents. Theoretical and practical implications are discussed.     

Implementation of co-teaching approach in an inclusive classroom: overview of the challenges,readiness, and role of special education teacher

The objective of this study was to determine the relationship aspect of the challenge, readiness, and the role of special education teacher (SET) in implementing common approaches in inclusive classrooms. Experiences as a moderator were used to see the effect of the co-teaching component. This study used a sampling method that involved 240 respondent’s representatives of the population of SET in Malaysia. The findings of this study showed that there was a high positive tendency in choosing the approach that is likely to progress than the existing ones. In this area, there were challenges and readiness of positive selection than teacher experience. Overall, this study could impact the implementation of co-teaching approach than the implementation of the existing programme.     

Managing Relationships: Insights from a Student Gratitude Model

Research in Higher Education - This paper develops a student relationship model which highlights the role of gratitude in impacting students’ positive perceptions, attitudes, and behavioral...     

Exploring the interrelationships between technological predictors and behavioral mediators in online tax filing: The moderating role of perceived risk

This study investigates the interrelationships between technological predictors and behavioral mediators in explaining users' continuance intention for online tax filing. Building on information systems (IS) success and IS continuance literature, this study proposes an extended conceptual framework by adding perceived functional benefit (PFB) as mediating, perceived risk as moderating, and demographic characteristics as control variables. The data collected, through a web-based survey, from 409 users of e-tax services in an emerging economy are analyzed through covariance-based structural equation modeling. Results confirm that PFB, confirmation of expectation, and satisfaction are the major antecedents of continuance intention for e-tax filing. The study also finds the evidence for the indirect effects of IS success factors on continuance intention through such antecedents. In addition, results suggest that the relationships between PFB and satisfaction as well as between PFB and continuance intention are contingent on the users' levels of perceived risk. The study concludes with the useful implications for academicians and policymakers in the context of an emerging economy.     

The COVID‐19 (Coronavirus) pandemic: reflections on the roles of librarians and information professionals

This Regular Feature explores the role of health science librarians in the coronavirus pandemic. COVID‐19 has spread rapidly all over the world. All major cities around the globe are in lockdown. In Pakistan, the first case was diagnosed on 26 February 2020, and currently, there are more than 2039 diagnosed cases and 26 deaths as on 31 March 2020. Across the country, there are further 12 000 suspected cases. This will undoubtedly increase if precautionary measures are not taken. Pakistani universities, colleges and schools were in lockdown. The role of university librarians in this emergency included raising awareness through public health education, providing support to medical staff, researchers and providing ongoing traditional services to regular library patrons in Pakistan. The Regular Feature also provides links to useful resources. JM.     

Impact of light intensity on flowering time and plant quality of<Emphasis Type="Italic">Antirrhinum majus</Emphasis> L. cultivar Chimes White

Shades of different light intensities (29%, 43%, 54%, 60% or 68%) along with control (no shade) were studied to observe their effects on the flowering time and plant quality. A hyperbolic relationship was observed between different light intensities under shade, and time to flowering. The total number of flower buds showed a curvilinear relationship with light intensities. Growth parameters related to the plant characteristics such as plant height, leaf area and plant fresh weight were improved under shading treatments at the expense of flowering time and number of flower buds. However, both linear and polynomial models applied assumed that cultivar Chimes White was equally sensitive to light intensity throughout development.     

Characterization of 17th Century Mughal tile glazes from Shahdara Complex,Lahore-Pakistan

The glazed tile decorative art was one of the widely used ornamental techniques for the monumental buildings during the Mughal period, in Pakistan. Coloured tile samples from Jahangir tomb were analyzed to know the glaze composition and to identify the colouring phases used at that time. The study was performed using light microscopy (OM), scanning electron microscopy equipped with energy dispersive X-ray analyzer (SEM-EDS), Raman spectroscopy (RS) and electron microprobe analysis (EMPA). These complementary analytical techniques allowed characterizing the samples as alkali glazes made from plant ashes. The results indicated the use of lead-tin yellow type II for yellow glazes, cobalt and copper for blue glazes, mixtures of yellow and blue glazes for the green glazes, manganese for purple glazes, and a transparent glaze layer for white glazes.     

Following the Footsteps of Specialist Physical Education Teachers in Singapore’s Primary Schools

This study explored the footsteps of specialist physical education teachers in Singapore’s primary schools. In particular, this paper uncovered the physical education teacher training in Singapore during post-colonial days, ground situations leading to the rise of the specialist physical education teachers and government policies influencing the increase of them in primary schools. Document analysis was employed to trace the development of teachers teaching physical education in Singapore’s primary schools since the 1950s. The focus was on how this development influences the position of specialist physical education teachers in primary schools. The key role of the primary school physical education teacher has changed from a teacher whose focus was on physical fitness to a teacher who looks to develop pupils holistically through pupil-centric sports and outdoor activities. A generalist teacher that did not specialize in physical education is no longer suitable to teach physical education. Government policies and initiatives such as the robust recruitment of physical education teachers and the continuation of the Diploma in Physical Education programme have had a direct impact on the increasing number of primary school specialist physical education teachers. However, this increase is still insufficient. A concerted effort must be made by the school management to prioritize the quality of physical education lessons and sports programmes.     

Use of digital media and demand for digitized contents in higher education sector of Pakistan

The use of digital media is on rise around the world and same phenomenon is emerging in Pakistan. The study was intended to explore the use of digital media and demand for digitized contents in higher education sector of Pakistan. The research questions were answered by a comprehensive literature review along with semi-structured in-depth interviews of 25 library experts. The findings conferred that the use of digital media in higher education is on rise and demand for digitized contents is growing increasingly. The findings of the study made a good case for the libraries to focus more on acquisition of information resources in digital formats as well as initiate digitization initiatives.