1,720,959 research outputs found
Scaffold 3D Kitosan dan Kolagen Sebagai Graft pada Kasus Kerusakan Tulang
Get PDFKerusakan tulang alveolar dalam kasus kedokteran gigi dapat disebabkan oleh penyakit periodontal, trauma pasca pencabutan gigi, post enukleasi kista, dan post operasi tumor. Kitosan merupakan bahan yang sering digunakan sebagai bahan graft namun penggunaannya sendiri kurang osteokonduktif apabila tidak dikombinasikan dengan bahan lain. Kitosan dapat dikombinasikan dengan kolagen dalam bentuk sediaan scaffold 3D untuk penyembuhan kasus kerusakan tulang. Untuk mengetahui sifat osteokonduktifitas bahan kitosan dan kolagen berupa sediaan scaffold 3D. Scaffold 3D kitosan dan kolagen dapat menirukan struktur dan fungsi alami dari protein ekstraseluler matriks, membentuk struktur unik yang dapat meningkatkan kekuatan mekanik, menurunkan tingkat biodegradasi, dan kombinasi keduanya dapat menghasilkan ion kompleks yang berperan untuk merangsang proliferasi dan diferensiasi sel sehingga dapat mempercepat proses penyembuhan tulang. Scaffold 3D kitosan dan kolagen berperan dalam proses penyembuhan tulang karena kedua bahan tersebut membentuk senyawa ion kompleks yang dapat meningkatkan sifat osteokonduktifitas
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
Agen Crosslink dalam Pembuatan Biomimetic Scaffold Sebagai Material Rekayasa Jaringan Tulang: Crosslink Agents in Biomimetic Scaffold Fabrication as a Material Of Bone Tissue Engineering
No full textCase of bone destruction such as socket of post-tooth extraction and periodontitis can cause pain and disrupt the function of mastication, so it takes a tissue engineering material in the form of biomimetic scaffold by mimicking the structure and the original function of bone. Material for bone tissue engineering that has grown widely include the use of collagen, gelatin, chitosan, and hydroxyapatite. These materials can be mutually combined using crosslink agents in the scaffold fabrication process. Determine the role of crosslink agents in the manufacture of biomimetic scaffolds as bone tissue engineering materials in the field of dentistry. Material in the scaffold fabrication is a polymer which can be modified by the incorporation of other polymers. Additionally, polysaccharides have abundant functional groups such as hydroxyl groups, amino groups and/or carboxylic acid groups, amenable to various types of chemical modifications. Modification with other polymers can be done by adding crosslink agents by irradiation or through chemical reactions. The role of a crosslink agent in a material modification can increase the material resistance to heat, light, other physical properties, and can increase the degree of dimensional stability and mechanical strength so these values are important to consider for the survival of cells in scaffolds at early time points. Different forms of crosslink agents can be utilized to obtain good biomimetic scaffold so that optimize the osteoconductivity properties of bone tissue engineering
Penggunaan Scaffold Kitosan-Aloe Vera Terhadap Proliferasi Sel Fibroblas pada Penyembuhan Luka Pasca Pencabutan Gigi Cavia Cobaya
Get PDFAloe vera has been investigated potential use in tissue engineering. Its bioactive compounds interact with growth factor receptor on the fibroblast and stimulate cells proliferation. The aim of this study was to investigate the proliferation of fibroblast cells on wound healing process of Cavia cobaya dental extraction using scaffold combination chitosan and Aloe vera. Cavia cobaya male with 300-350 grams of weight and in the age of 3 to 3.5 months. It divided into ten groups (n=5). For Treatment groups, Aloe vera scaffold(Av); Chitosan Scaffold (Ch); Scaffold combination chitosan-Aloe vera (Ch-Av) and scaffold combination chitosan- Aloe vera- hidroksiapatit(Ch-Av-HA) were applied into the socket of dental extraction. For control group, which were not given scaffold. Cavia cobaya were decaputated at 7 and 14 days and the jaw in the treated regions and control group were cut for Histopatology Anatomy examination to investigate the proliferation of fibroblast cells. Data were analyzed using One way Anova test. The proliferation of fibroblast cells were found higher in the group which given Av-Ch and Av-Ch-HA scaffold. The result showed significant differences in proliferation of fibroblast cells for 7 and 14 days observation compared to control group (p<0,05). The application of scaffold combination Chitosan and Aloe vera accelerate the wound healing process of Cavia cobaya dental extraction
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
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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