1,720,956 research outputs found
Analisa Fitokimia dan Kandungan Bahan Aktif dari Lima Aksesi Tanaman Handeuleum (Graptophyllum pictum (L.) Griff)
Get PDFHandeuleum ( Graptophyllum pictum (L.) Griff) constituting acknowledged dill useful to cure some types disease as pile. This plant have color pattern performance leaf which variably. This research is done at Observational Hall examination laboratory Dill and Achromatic, Bogor in july until September 2008. To the effect research is get phytochemical content picture and active component of 5 accession handeleum's plants. Phytochemical is obstetric analysis (alkaloid, saponin, tanin, glikocide, flavonoid, fenolik, triterpenoid, steroid) done at Observational Hall Examination Laboratory Dill and Achromatic (Balitro) Bogor, meanwhile GC MS'S analysis is done at Laboratory Dopes Jakarta. Of compound analysis result phytochemical is gotten that 5 accession handeuleum contain alkaloid's compounds, saponin, tanin, glikosida with notation 4 + or herculean. Accession with patterns green leaf turn white at green erect periphery and brown have phytochemical content same, while accession with colour patterns green leaf turn white to be intermediated have flavonoid's content is contemned 2 +. Of GCMS'S analysis result apparently exhaustive accession handeleum contains kindred active component with vitamin e,Neophytadiene, tocopherol's gamma, Ergost - 5 en 3 ol (3. beta.) and stigmast - 5 en 3 ol. Key words: Graptophyllum pictum, phytochemical, active component, accessio
Pengaruh Kehalusan Bahan Dan Lama Ekstraksi Terhadap Mutu Ekstrak Tempuyung (Sonchus arvensis L.)
Get PDFUtilization of medicinal plants both for health and treatment increased at this time. Number of Traditional Medicine Industry (IOT), Small Industries Traditional Medicine (IKOT) and Industrial Appliances (PIRT) is increasing. Thus the demand for raw materials is increasing, one of which is tempuyung. Good quality raw material in the form of crude drugs and extracts need to be considered as related to the efficacy and quality of products for further processing. The study aims to determine the effect size and the old material extraction to the yield and quality of the extract. Activity consists of two sub-activities (1). How to drying (a) the sun covered with black cloth, (b) the sun combination of tools, and (c) drier. Sub-activities (2) extraction technique which consists of two factors: the fineness of materials (20,40 and 60 mesh) and the second factor is the length of the extraction (2, 4, and 6 hours). The study design using factorial completely randomized design with three replications. Parameter observations consisted of yield bulbs, phytochemical screening, quality characteristics, extract yield, and quality extracts. The results showed levels of water extract Sonchus arvensis L. greater than the levels of alcohol cider. Quality simplicia Sonchus arvensis L. dried using a dryer is not different from the quality of the dried under the sun. Fineness of materials and time of extraction affects the yield of the extract Sonchus arvensis L Keywords: Subtlety material, extraction, quality</jats:p
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
Pengaruh Pelayuan Dan Penyulingan Terhadap Rendemen Dan Mutu Minyak Serai Wangi (Cymbopogom nardus)
Get PDFDemand for essential oils is increasing one of them is citronella oil. In addition to the cosmetic industry, aromatherapy, medicine and pesticide plant, citronella oil can also be used as a biofuel that can support the development of agricultural systems-bioindustry and waste for livestock feed. To fulfill demand for quality citronella oil, needed an effectiveprocessing technology.The research aims to gain processing technology to increase the production and quality citronella oil. The research using completely randomized design consisting of two factors and replications. The first factor is the time of wilting (A) consists of 5 levels: a1 (fresh), a2 (2 days), a3 (4 days), a4 (6 days), a5 (8 days), and a6 (dried). The second factor is distillation time (B) consists of 3 levels: b1 (2 hours), b2 (4 hours), and (6 hours). Parameters observed were water content, oil yield, oil quality, and physico-chemical properties of the oil. The results showed, wilting time and refining effect on the yield and quality of citronella oil. The essential oil yield ranged from 0.28 to 0.69% of fresh ingredients, wilt and dry from 1.30 to 2.17% from 1.09 to 1.42%. The longer it wilting, the resulting oil yield higher. Total geraniol fresh citronella 78.23%, wilted material 83.12 to90.22% and dry matter 83.68%, while sitronellal content each by 38.40%, 31.11 to 34.82%, and 33,36%. Citronella oil of processing technology effectively is wilting for two days and 4 destilation time 4 hours.Keywords: Cymbopogon nardus), withering, distillation, geraniol, citronella
Teknik Pelayuan dan Penyulingan Untuk Menghasilkan Minyak Timi Berkualitas
Get PDFThe utilization of medicinal plants for health and increasing treatment at this time. The number of traditional medicine industry is increasing so the demand for medicinal plants as raw material for the drug also increased. The quality of raw materials is very important to note because the drugs associated with efficacy. And refining research techniques to produce a withering thyme oil quality testing has been carried out in the Laboratory of the Research Institute for Spices and Medicinal Crops, Bogor from January to December 2013. The objectives research was to obtain raw materials that meet the standards. The thyme, the first factor is the length of withering (0, 2, 4, and 6 days) and a long second distillation (2, 4 and 6 hours). The research design using factorial completely randomized design with three replications. Observation parameters consist of oil yield, refractive index and content thyme oil thymol. Thyme oil quality is affected by withering and distillation. The optimal distillation techniques found in withering thyme for 6 days and 6 hours distillation. Keywords: Thymus vulgaris L, withering, distillation, extraction and thymo
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
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