1,720,955 research outputs found
DETERMINATION OF BORAX CONTENT IN VARIOUS FOOD MATERIALS CIRCULATING IN AMBON CITY
No full textFood safety is a critical issue for public health, especially in developing countries like Indonesia, where the use of unauthorized food additives still occurs frequently. This study aims to analyze the presence of borax, or sodium tetraborate, in food circulating in Ambon City. The methods employed include qualitative analysis using turmeric paper and quantitative analysis through UV-Vis spectrophotometry. Out of 10 samples tested, 4 samples (40%) were positively detected to contain borax in the qualitative test. Quantitative analysis revealed borax concentrations ranging from 2.461 to 3.051 ppm, with the following details: Wayame Market Noodles (2.858 ppm), OM Supermarket Noodles (2.641 ppm), OM Supermarket Meatballs (2.935 ppm), and Mardika Market Meatballs (3.051 ppm). These findings indicate a serious health risk due to the consumption of borax-containing foods, which can lead to various health issues in both the short and long term
DEVELOPMENT OF CACAO VARIETY IDENTIFICATION METHOD USING COMBINATION OF FTIR SPEKTROSCOPY AND MULTIVARIATE ANALYSIS
No full textAbstract
Indonesia is the third largest cocoa producing country after Ivory Coast and Ghana. Indonesian cocoa agribusiness still faces obstacles, among others, the low quality of cocoa beans caused by different types of cocoa plant varieties. The amount of phenolic compounds in cocoa depends on the variety. There are 3 variety of cocoa plants, namely Criollo (fine flavoured cocoa) Forestero (bulk cocoa) and Trinitario (Criollo and Forestero hybrids). This study aims to identify cocoa varieties quickly and efficiently to control the quality of cocoa bean production. The method used in this study is a combination of Fourier Transform Infrared (FTIR) Spectroscopy Method and Multivariate Analysis Method. The combination of these two methods has been widely developed for the identification and authentication of types of plants that have similar or close ties. Based on the results of FTIR (Fourier Transform Infrared) analysis at a wave number of 4000-400 cm-1 to 15 samples of cocoa beans, a spectrum that is multicomponent and relatively the same is obtained. The spectrum data is processed by the multivariate analysis method, Principle Component Analysis (PCA) and obtained that the 3 variety of cocoa can be clearly distinguished where the value of the main components (PC-1 and PC-2) is 92.03%
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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
PHYTOCHEMICAL PROFILE AND ANTIOXIDANT POTENTIAL OF ETHANOL EXTRACT FROM GATAL LEAVES (Laportea Decumana) OF MALUKU
No full textAbstract
This study aimed to evaluate the phytochemical profile and antioxidant activity of ethanol extract from Gatal leaves (Laportea decumana) sourced from Maluku. Dried leaf powder was extracted with 96% ethanol over three cycles of 24 hours, followed by concentration using a rotary evaporator. Qualitative phytochemical screening confirmed the presence of phenols, flavonoids, alkaloids, tannins, and terpenoids, while saponins and steroids were not detected. Phenols and flavonoids were identified as the dominant bioactive compounds responsible for strong antioxidant properties. Antioxidant activity was assessed using the DPPH assay, yielding an IC₅₀ value of 55.31 ppm slightly higher than the positive control, vitamin C (IC₅₀ = 47.20 ppm) indicating potent free radical scavenging ability. These findings confirm that the ethanol extract of Gatal leaves is rich in bioactive phytochemicals, particularly antioxidants, and holds significant potential as a natural raw material for the development of herbal or nutraceutical products
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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