1,720,968 research outputs found
Analisis Informasi Tanaman Herbal melalui Media Sosial ditengah Masyarakat pada Pandemi Covid-19: Sebuah Tinjauan Literatur
Full text linkTanaman herbal sebagai bahan utama obat tradisional memiliki kandungan yang berfungsi sebagai imunomodulator, mengurangi gejala dan mengatasi komorbid Covid-19. Tanaman herbal sangat baik digunakan dalam kondisi pandemi saat ini. Meskipun memiliki banyak fungsi, penggunaan tanaman herbal perlu pengolahan yang benar, kadar yang sesuai kebutuhan tubuh serta perlu uji fitofarmaka. Kondisi yang tepat guna seperti ini, tidak tersampaikan pada informasi melalui media sosial, sehingga pengguna tidak mengetahui efek negatif penggunaan tanaman herbal berlebih seperti menyebabkan sariawan, alergi dan penyakit lainnya. Selain itu penyebaran informasi yang salah menyebabkan resiko dari segi ekonomi seperti terjadinya kenaikan harga dan kelangkaan bahan herbal yang dibutuhkan sehingga dapat mempengaruhi sosial ekonomi masyarakat. Penulisan ini bertujuan menganalisiskajian mengenai fungsi dan efek negatif tanaman herbal yang tersebar luas di masyarakat pada pandemi seperti saat ini, pengaruh tanaman herbal untuk Covid-19 serta dampak pemberitaan melalui sosial media dari segi sosial, ekonomi dan hukum yang berpengaruh. Hasil studi menunjukan adanya pengaruh penyebaran informasi fungsi tanaman herbal melalui media sosial ditengah masyarakat khususnya di Indonesia. Penyebaran informasi tersebut mempengaruhi segi sosial dimana masyarakat lebih mempercayai jamu daripada obat. Selain itu, kenaikan harga bahan herbal mempengaruhi perekonomian, hingga terjadi pemberian informasi yang salah sehingga memicu penyalahgunaan hukum
Solid state fermentation method for production of laccase enzyme with bagasse, cornstalk and rice husk as substrates for adrenaline biosensor
No full textAdrenaline is an important neurotransmitter in the body that will be released from the body when someone is in emotional state or in state of physical and emotional stress, such as hypoglycemia, work out, and excessive pain in the body. Early diagnosis based on the determination of adrenaline concentration in plasma and urine can prevent unnecessary drug use (Hollenbach et al., 1998 [1]). In adrenaline, there is an enzyme, called laccase. Laccase has wide application in industry and medical application. Moreover, the producing of laccase is need to be more develop to produce high activity of enzyme. The high activity enzyme will be affected to the determination of adrenaline concentration. Therefore, the aim of this research is to extract extracellular laccase from fermentation of Trametes versicolor with solid state fermentation method on lignocellulosic waste in the form of bagasse, corn stalk and rice husk. A utilization of biomass waste had applied in this work. We investigated the best pre-treatment condition to produce laccase. Steam explosion is used for the treatment of raw substrates. The best substrate for producing laccase was cornstalk with additional treatment of steam explosion and nutrient addition. Finally, investigation of substrates selection had been done and obtained 6.885 U/mL of laccase activity
Production of methyl caffeate as an intermediate product to produce caffeic acid phenethyl ester by esterification using cation-exchange resin
No full textCaffeic acid (CA) could be considered as an important natural anti-oxidant. However, the low solubility and stability of CA in various solvent is limiting the application in industry. It is advantageous to synthesize alkyl ester of caffeic acid based on both their biological function and potential application. One of the caffeic acid derivatives called caffeic acid phenethyl ester (CAPE) is a compound with numerous important biological activities. To synthesize CAPE one of the method used is catalyzed esterification of caffeic acid and phenethyl alcohol using ion exchange resin catalyst. The first step of the process is to perform esterification of caffeic acid and methanol to produce methyl caffeate (MC). MC would then be used to produce CAPE in the presence of phenethyl alcohol. Herein, the reaction condition and kinetic parameters for the synthesis of MC using cation-exchange resin as a catalyst were investigated, and the product was confirmed by high-performance liquid chromatography (HPLC). The highest yield of MC catalyzed by cation-exchange resin attained under the optimum condition as follows: reaction temperature of 60 °C and a reaction time of 4 h. The esterification kinetics of CA and methanol is described by the pseudo-homogeneous first order model. The relationship between temperature and the forward rate constant gives activation energy of 51 kJ/mol. These results indicated that cation-exchange resin possesses high catalytic activity in the synthesis of MC, which is an efficient catalyst suitable for MC production
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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