1,721,031 research outputs found
Perbaikan Teknik Kultur Embrio Kelapa Kopyor (Cocos nucifera L.) Asal Sumenep Jawa Timur Melalui Penambahan Bahan Aditif dan Pengujian Periode Subkultur
No full textThe success of culturing of “Kopyor” coconut (matured coconut with broken meat particles due to abnormal
formation of endosperm) through embryo culture depends on the medium used. A revised protocol on medium embryo
culture was done to increase embryo germination and plantlet production of kopyor coconut obtained from Sumenep.
Embryos excised from mature nuts were cultured in solid Eeuwens basal media supplemented with 150 ml coconut
water, 150 ml coconut milk, 50 mg/l thio-urea, and 100 mg/l thio-urea. Germinating embryos were transferred to solid
Eeuwens basal media containing 100, 150, and 200 ml/l coconut water. Subsequent transfers of the germinating
embryos to fresh media to complete seedling development were done at different periods of subculture, i.e., 1, 2, 3, and
4 months. The highest viability of kopyor embryo was shown by 150 ml/l coconut water, about 95% embryos in this
medium germinated. At plantlet phase, addition of coconut water did not give a positive result to the growth of kopyor
plantlets. However, coconut water could increase the complete plantlet, i.e., plantlet with shoot and good root. Growth
and number of kopyor plantlets obtained were the best when the plantlets transferred into fresh medium every 2 months.
Key words: Embryo culture, kopyor coconut, additive agents, period of subcultur
MORPHOLOGICAL CHARACTERS OF KOPYOR COCONUT GROWN IN SUMENEP, MADURA, INDONESIA
No full textOne of the centers of kopyor coconut in Java was located in Sumenep,
Madura. The original kopyor coconuts mostly grown in a home garden and mixed
with the normal palms. Recently, the local goverment has been implementing some
programs to extend the growing area of kopyor coconut. The potentials of kopyor
coconut gemplasm of this area, however, have not been fully explored. The original
kopyor palms were characterized based on their morphological characters. In
Sumenep was found only 1 (one) type of kopyor palm, tall variety, with 3 (three)
colour forms: green, brown, and red form. Except for these tall variety no other
dwarf variety had been observed. The average age of kopyor tall coconut trees was
10-25 years old. The number of nuts per bunch per tree were 9-18, while number
of kopyor nuts per bunch were 1-5. Based on fruit components, Red Kopyor Tall
Coconut smaller than the Green or Brown Kopyor. Observation on the endosperm
revealed three distinct types of endosperm structure. Type A, the endosperm was
separated from the shell and broken into small clumps; coconut milk little or none at
all; very gentle and soft. Type B, some parts of the endosperm remain attached to
the shell, soft, rough and relatively a lot of coconut water. Type C, the endosperm
was soft and still attached to the shell with a lot of coconut water.
Key words: Cocos nucifera, tall variety, endosperm, coconut gemplasm
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
No full text“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
No full textWe 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
No full textWe 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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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