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41.
The purpose of this study is to assess the status of public libraries located in Rawalpindi District, Pakistan, in terms of administrative setup, collection, staff, resources, and services. The article is derived from evidence obtained through a questionnaire-based survey carried out in December 2013. This survey was conducted for the preparation of “Directory of Public Library Project” a joint venture of Punjab Library Foundation and Department of Library and Information Science, University of the Punjab. The survey found eleven public libraries in the District of Rawalpindi. Only three of these have professional staff. Overall, libraries have poor and outdated book collections that are not properly classified and cataloged. Information Communication Technology infrastructure exists in libraries with some exceptions. Most of the libraries are facing constraints (e.g., low number of hours, too small in size, and too many users for size of collections) that result in inadequate services. Most of the libraries are facing similar problems, which are being faced by other public libraries of Pakistan (e.g., shortage of professional staff, lack of modern facilities, and insufficient funds). Practical recommendations are made at the end of study.  相似文献   
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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.
  相似文献   
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Studying everyday life information seeking (ELIS) in a variety of contexts contributes to its conceptual development. The primary goal of this study was to understand ELIS in the context of female university students' coping with daily hassles. To identify the dimensions and determinants of ELIS, and to fill this current gap in the literature, a grounded theory study was conducted using Flick's stages of episodic interviewing with 21 Iranian female first-year university students. Data were collected through semistructured interviews and analyzed through open, axial and selective coding. The findings showed that ELIS in coping with daily hassles is a multidimensional phenomenon that is affected by individuals' characteristics and sociocultural norms and values. Three main categories emerged as determinants of ELIS, namely normative status of the daily hassles, normative status of the information resources, and the individual's characteristics. Two main categories emerged as dimensions of ELIS which were type and strategy of action. Results of this study can contribute to the conceptual development of ELIS and may indicate how and in what circumstances ELIS dimensions emerge. The findings can also be used as a basis for developing information and intervention services in the context of coping with daily hassles.  相似文献   
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This study evaluated effect of mental rotation (MR) training on learning outcomes and explored effectiveness of teaching via three-dimensional (3D) software among medical students with diverse spatial intelligence. Data from n = 67 student volunteers were included. A preliminary test was conducted to obtain baseline level of MR competency and was utilized to assign participants to two experimental conditions, i.e., trained group (n = 25) and untrained group (n = 42). Data on the effectiveness of training were collected to measure participants’ speed and accuracy in performing various MR activities. Six weeks later, a large class format (LCF) session was conducted for all students using 3D software. The usefulness of technology-assisted learning at the LCF was evaluated via a pre- and post-test. Students’ feedback regarding MR training and use of 3D software was acquired through questionnaires. MR scores of the trainees improved from 25.9±4.6 points to 28.1±4.4 (P = 0.011) while time taken to complete the tasks reduced from 20.9±3.9 to 12.2±4.4 minutes. Males scored higher than females in all components (P = 0.016). Further, higher pre- and post-test scores were observed in trained (9.0±1.9 and 12.3±1.6) versus untrained group (7.8±1.8; 10.8±1.8). Although mixed-design analysis of variance suggested significant difference in their test scores (P < 0.001), both groups reported similar trend in improvement by means of 3D software (P = 0.54). Ninety-seven percent of students reported technology-assisted learning as an effective means of instruction and found use of 3D software superior to plastic models. Software based on 3D technologies could be adopted as an effective teaching pedagogy to support learning across students with diverse levels of mental rotation abilities.  相似文献   
45.
High-quality professional development is needed to prepare teachers to help students learn how to conduct online academic research and meet Common Core State Standards for English Language Arts. This study created and evaluated a Web-based professional development program with five instructional modules designed to prepare middle-school teachers to teach their students nine strategies for conducting academic research online. The online professional development program was specifically created to help teachers implement the previously developed online SOAR Student Toolkit curriculum with all students in inclusive classrooms. Results of a 2015–2016 pilot study conducted with 13 teachers and 477 students in sixth to eighth grades indicated that most teachers perceived the professional development program to be of high quality and relevant in helping them teach online research skills to their students. Students significantly improved online research skills after learning from trained teachers (27 percentage points improvement, from 18% at pretest to 45% at posttest).  相似文献   
46.
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。  相似文献   
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This article introduces playful learning as part of the decolonising project at institutes of higher learning in South Africa with specific reference to the discipline of communication design. Not only does the article interrogate the content of design education, specifically design for development, but more specifically the way that design for social innovation is taught. The article begins with a contextualisation of the decolonisation debate both locally and internationally, which is followed by a brief historical overview of formal design education. Design education’s trajectory informs the contemporary conception of design as a form of rhetoric. Design and play are then interfaced theoretically, and pragmatically through a case study to explore how deeper learning was made possible by play in a curriculum‐based project. Ultimately, the article aims to highlight the value of playful learning in design higher education to nurture alternate modes of design thinking that favour localised practice, intersubjective relationships between designers and their stakeholders and the enabling of students’ self‐realisation through real world experience.  相似文献   
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