1,721,213 research outputs found
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
PRODUCTION AND CHARACT RIZATION OF CRUD INTRAC LLUL R PHYTAS FROM R COMBINANT BACT RIA pEAS1AMP
Full text linkThis research was aimed a producing a crude intracellular phy ase charac erized from recombinan
bac eria.The recombinan bac eria (pEAS1AMP )was produced by way of ransforming pET-22b(+)
+pEAS1 in o compe ent E.coli BL21 and E.coli BL21(DE3)cells.Crude in racellular phy ase
produc ion was induced using 1,5 mM Isopropyl-β-D-thiogalactopyranosid (IPTG).Recombinant
bac eria produc and enzyme ac ivi y es followed he Sajidan me hod.E.coli BL21(+)pEAS1 and E.
coli BL21 (DE3)(+)pEAS1 recombinan bac eria showed grow h af er 20 hours and 10 hours of
ransforma ion.Phy ase ac ivi y of E.coli BL21 (DE3)(+)+pEAS1 showed higher han hose of E.coli
BL21(+)+pEAS1 .Crude intracellular phy ase of pEAS1AMP recombinan bac eria has an op imum
ac ivi y a pH 5,40 o C,incuba ion period of 60 minutes,subs ra e concen ra ion of 2%,molecular weigh
(MW)of 47.3 kDa,Km =15.91 u and Vm =2.41 u second.Mg 2+ ac s as a cofac or bu Fe 3+ (10 -4
M)ac s as an inhibi or.
K ywords:bact ria r combinant pEAS1AMP,compet nt c lls,crud intrac llular phytas
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
Protein expression on Cr resistant microorganism using electrophoresis method
Full text linkAbstrak. Fatmawati U, Suranto, Sajidan. 2009. Ekspresi protein pada mikroorganisme resisten Cr dengan metode elektroforesis.
Nusantara Bioscience 1: 31-37. Krom heksavalen (Cr(VI)) dikenal sebagai logam berat beracun, sehingga perlu direduksi menjadi
Cr(III) yang lebih rendah toksisitasnya. Pseudomonas aeruginosa, Pseudomonas putida, Klebsiella pneumoniae, Pantoea sp. dan
Saccharomyces cerevisiae adalah mikroorganisme resisten dan mampu mereduksi Cr(VI). Tujuan penelitian ini adalah mengetahui
kemampuan mikroorganisme dalam mengurangi Cr(VI) dan mengetahui pola pita protein antara mikroorganisme resisten Cr(VI) dan
mikroorganisme tidak resisten yang diinokulasi pada medium kaldu LB. SDS-PAGE digunakan untuk mengetahui ekspresi protein,
sementara konsentrasi Cr(VI) diidentifikasi dengan metode 1,5 difenilkarbazid. Data kuantitatif dianalisis dengan ANAVA dua faktorial
dilanjutkan dengan uji jarak berganda Duncan pada taraf 1%. Data kualitatif yaitu ekspresi protein dianalisis dengan mobilitas relatif
(Rf). Hasil penelitian menunjukkan bahwa kemampuan mikroorganisme dalam mereduksi Cr(VI) pada konsentrasi awal 0.5 ppm, 1 ppm,
5 ppm dan 10 ppm berbeda-beda, persentase rata-rata kemampuan masing-masing mikroorganisme dalam mereduksi Cr(VI) adalah: P.
putida (65%) > S. cerevisiae (64,45%) > P. aeruginosa (60,73%) > Pantoea sp. (50,22%) > K. pneumoniae (47,82%) > tanpa
mikroorganisme (34,25%). Penambahan mikroorganisme secara nyata mempengaruhi reduksi Cr(VI). SDS-PAGE menunjukkan bahwa
ekspresi protein antara mikroorganisme resisten dan tidak resisten tidak berbeda, tetapi mikroorganisme resisten memiliki lebih banyak
protein (pita protein lebih tebal).
Kata kunci: logam berat Cr, mikroorganisme, protein, elektroforesis
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
Variation of Morphological and Protein Pattern of Cassava (Manihot Esculenta) Varieties of Adira1 and Cabak Makao in Ngawi, East Java
Full text linkTribadi, Suranto, Sajidan. 2009. Variation of morphological and protein pattern of cassava (Manihot esculenta) varieties ofAdira1 and Cabak makao in Ngawi, East Java. Nusantara Bioscience 2: 14-22. This research is intended to find out the morphologicaland anatomical variation as well as the protein band pattern of cassava (Manihot esculenta Crantz) widely spread in three different areasof height. The sample collecting is done using simple random sampling in the three different areas of height that is 50, 300, 1000 metersasl in Ngawi District, East Java while the analysis of protein band pattern is done using SDS-PAGE. The result of the reseach ofmorphology and anatomy is analyzed descriptively and presented in the form of tabels, histograms and figures. The analysis of proteinband pattern is done using quantitative and qualitative analysis that is based on the appearance or not the gel band pattern by countingthe molecular weights based on code marker S 8445 and qualitative method based on the quality of the band formed. The band patternformed is istimated and presented in the form of zimogram. The result of the research shows that the height of the cultivating site verymuch influences toward variations of root, stem and leaf morphology. The longest root is at 50 meter heights asl (Cabak makao localvariety, the widest stem diameter is at 50 meters asl (Cabak makao local variety) the longest leaf and branch is at 300 meters asl (Cabakmakao local variety) and 1000 meters asl (Cabak makao local variety). There is no difference of anatomy in the root, stem and leaf andno difference of protein band pattern either in Adira1 or Cabak makao local variet
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