1,720,960 research outputs found
Uji Aktivitas Anti-Hiperglikemik, dan Penghambatan Stres Oksidatif Ekstrak Etanol Daun Jeruk Nipis (Citrus aurantifolia) pada Tikus Diabetes yang Diinduksi Aloksan
Full text linkPada keadaan patologik seperti diabetes, peningkatan stress oksidatif dalam tubuh akan menyebabkan penurunan aktivitas antioksidan endogen dalam tubuh sehingga tubuh tidak mampu mendetoksifikasi radikal bebas dan mencegah kerusakan sel. Salah satu sumber antioksidan alami sebagai antidiabetes adalah daun jeruk nipis (Citrus aurantifolia). Tujuan penelitian ini adalah untuk mengetahui aktivitas anti hiperglikemia ekstrak etanol daun jeruk nipis dan aktivitas enzim antioksidan SOD dan GPX.
Penelitian ini adalah penelitian eksperimental laboratorium dengan menggunakan rancangan post test only group design. Subyek penelitian ini adalah 30 ekor tikus putih jantan galur Wistar yang dikondisikan DM tipe 2 dengan induksi aloksan. Tikus dikelompokkan menjadi 6 kelompok : kelompok I netral, kelompok II tanpa perlakuan, kelompok III kontrol positif glibenklamid 80 mg/Kg BB, Kelompok IV, V dan VI adalah kelompok perlakuan dengan dosis berturut- turut 62,5 mg/Kg BB, 125 mg/Kg BB dan 250 mg/Kg BB. Kemudian dilakukan uji aktivitas SOD dan GPX
Measuring the Antioxidant Effect of Limnocharis Flava on Malondialdehyde Activities in Livers of Alloxan-induced Diabetic Rats
No full textAntioxidants are substances counteracting the effects of free radicals. Antioxidants are formed in several forms, encompassing vitamins, minerals, and phytochemicals. Genjer or yellow velvet leaves (Limnocharis Flava) is an aquatic plant potentially beneficial alternative to natural antioxidants. This study aims to measure the antioxidant effect from the yellow velvetleaf ethanol extract on malondialdehyde (MDA) activities in livers of diabetic rats (Rattus novergicus) induced by alloxan in three different doses. The tested animals were randomly divided into five groups comprising six white rats previously induced with alloxan by intra-peritoneal injection. Group 1 was the negative control provided 0.5% CMC Na while group 2 was a positive control administered 0.45 mg glibenclamide. On the other hand, groups 3, 4, and 5 were the experimental groups that provided the extract of yellow velvetleaf as many as 32.5 mg/kg body weight (BW) ethanol, 65 mg/kg BW ethanol extract, and 130 mg/kg BW, respectively. Furthermore, the extracts were administered once on the 7th, 14th, and 21st days; the parameters observed were MDA activities in the rats’ livers. The Thiobarbituric Acid Reactive Substances (TBARs) method was then employed to investigate these actions. The one-way ANOVA was administered to examine the acquired data from the examination, followed by a post hoc test. The average points of the MDA level from group 1 to group 5 were 10.78 0.33, 3.71 + 0.19, 7.25 + 0.26, 5.76 + 0.25, and 4.01 + 0.22, correspondingly, according to the results. The one-way ANOVA test revealed that MDA levels in each test group were significantly different (p 0.05). Based on these findings, it may be concluded that feeding ethanol extract from yellow velvet leaves to diabetic rats reduces MDA levels in their livers, therefore preserving cells from harm.Antioxidants are substances counteracting the effects of free radicals. Antioxidants are formed in several forms, encompassing vitamins, minerals, and phytochemicals. Genjer or yellow velvet leaves (Limnocharis Flava) is an aquatic plant potentially beneficial alternative to natural antioxidants. This study aims to measure the antioxidant effect from the yellow velvetleaf ethanol extract on malondialdehyde (MDA) activities in livers of diabetic rats (Rattus novergicus) induced by alloxan in three different doses. The tested animals were randomly divided into five groups comprising six white rats previously induced with alloxan by intra-peritoneal injection. Group 1 was the negative control provided 0.5% CMC Na while group 2 was a positive control administered 0.45 mg glibenclamide. On the other hand, groups 3, 4, and 5 were the experimental groups that provided the extract of yellow velvetleaf as many as 32.5 mg/kg body weight (BW) ethanol, 65 mg/kg BW ethanol extract, and 130 mg/kg BW, respectively. Furthermore, the extracts were administered once on the 7th, 14th, and 21st days; the parameters observed were MDA activities in the rats’ livers. The Thiobarbituric Acid Reactive Substances (TBARs) method was then employed to investigate these actions. The one-way ANOVA was administered to examine the acquired data from the examination, followed by a post hoc test. The average points of the MDA level from group 1 to group 5 were 10.78 0.33, 3.71 + 0.19, 7.25 + 0.26, 5.76 + 0.25, and 4.01 + 0.22, correspondingly, according to the results. The one-way ANOVA test revealed that MDA levels in each test group were significantly different (p 0.05). Based on these findings, it may be concluded that feeding ethanol extract from yellow velvet leaves to diabetic rats reduces MDA levels in their livers, therefore preserving cells from harm
The Assay of Blood Plasma’s Malondialdehyde (MDA) Activity in Alloxan-Induced Diabetic Rat Given Yellow Velvet Leaf Extract (Limnocharis flava)
No full textIt has been well-known that Genjer or yellow velvet leaf (Limnocharis flava) has a potential as an alternative source to natural antioxidants. Antioxidants, such as flavonoids, alkaloids, phenols, tannins, and others are substances which can block the presence of free radicals coming into the body. It has also been examined to be beneficial in treating metabolic syndrome diseases such as diabetes, as it improves insulin’s performance. The objective of this study is to examine the antioxidant effect of yellow velvet leaf’s ethanolic extract (Limnocharis Flava) on blood plasma’s MDA activity in alloxan-induced diabetic rats (Rattus novergicus) in three different doses. The testing animals were randomly divided into five groups, each group consisted of 6 white rats. Group 1 was the negative control and given CMC Na 0.5%, while group 2 was a positive control and given glibenclamide 0.45 mg, group 3 was yellow velvet leaf’s ethanolic extract of 32.5 mg/kg, group 4 was yellow velvet leaf’s ethanolic extract of 65 mg/kg, group 5 was yellow velvet leaf’s ethanolic extract of 130 mg/kg. Previously, all groups were induced with alloxan through intra peritoneal injection. Ethanol extract was provided once on the day of 7th, 14th, and 21st. The observed parameters were blood plasma’s MDA activity in the alloxan-induced diabetic rats (Rattus novergicus). Blood plasma’s MDA activities were assessed by using Thiobarbituric Acid Reactive Substance (TBARs) method. Then, data were collected and analyzed by using One Way ANOVA followed by a Post hoc test. The results showed that the mean values of MDA levels in the testing groups of 1,2,3,4 and 5 were 9.30 ± 0.462, 2.17 ± 0.121, 6.11 ± 0.381, 4.07 ± 0.327, and 2.75 ± 0.121, respectively. One Way ANOVA test showed a significant difference in the blood plasma’s MDA levels among the groups (p = 0,000). It is concluded that the blood plasma’s MDA levels in alloxan-induced diabetic rats can be lowered by the yellow velvet leaf’s ethanolic extract (Limnocharis Flava). Therefore, it can be employed as a traditional treatment for diabetes
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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