1,720,979 research outputs found
The Use of Microorganisms for Gene Transfer and Crop Improvement
No full textKavas, Musa/0000-0001-5903-2873; Gurel, Ekrem/0000-0001-6262-2866WOS: 000463411400001…https://doi.org/10.1016/b978-0-444-63987-5.00001-3https://hdl.handle.net/20.500.12712/11800https://doi.org/10.1016/B978-0-444-63987-5.00001-
Genetically modified organisms and turkish legislation
No full textThe main purpose of my article is to discuss what GMOs are, the controversies about this specific issue and the related regulations that are put forward by the authorities. GMOs are genetically altered organisms which have been widely produced and breeded in certain parts of the world. According to some experts, this special practice of agriculture emerged in order to put an end to famine and prevent food scarcity. As growing GMOs seems to be more convenient than the traditional farming, it is more eligible to produce food in large scale which will be a fine solution for food scarcity. However, there are some oppositions to the GMOs. It is strongly believed that the real causes of famine is not related to production, it is a problem of distribution of food. Moreover, patenting the seeds leads to an unstoppable control and dominance over food by the private enterprises. Therefore, the opponents state that the aims of these companies are solely financial gain and monopolisation in food production. Patenting the seeds is another arguable issue. It poses a great threat for the organic farmers since GMO seeds can contaminate the others through natural ways. This is not the only danger that organic farmers face with; thay can also be sued by the GMO producers for this unintended exposure to GMO seeds. Not only the diminishing of the variety of species but also the possible adverse effects of GMOs on human health create a debate between the two groups. These are not the only topics that are open to discussion. In addition to these, labelling the products creates a huge problem among the poorly educated consumers as they have not been clearly regulated in some countries. Hence, this subject having such a close connection to human health cannot be ignored by the law. In fact, a number of countries have enacted legislation in order to regulate this sensitive field. Turkey, having been dependent on the import of the agricultural goods for a period of time, has to join these countries with a recent legislation. All these contemporary issues for Turkey will be highlighted in my article
Gene expression analysis of bud burst process in European hazelnut (Corylus avellana L.) using RNA-Seq
No full textKavas, Musa/0000-0001-5903-2873WOS: 000456979000002PubMed: 30804627The control of bud burst process depending on temperature is crucial factor in woody perennial plants to survive in unfavorable ecological conditions. Although it has important economic and agronomic values, little information is available on the molecular mechanism of the bud burst process in Corylus avellana. Here for the first time, we conducted a de novo transcriptome-based experiment using eco-dormant leaf bud tissues. Four transcriptome libraries were constructed from the leaf bud tissues and sequenced via Illumina platform. Transcriptome analysis revealed 86,394 unigenes with a mean length of 1189 nt and an N50 of 1916 nt. Among these unigenes, 63,854 (73.78%) of them were annotated by at least one database. De novo assembled transcripts were enriched in phenylpropanoid metabolism, phytohormone biosynthesis and signal transduction pathways. Analyses of phytohormone-associated genes revealed important changesduring bud burst, in response to gibberellic acid, auxin, and brassinosteroids. Approximately 2163 putative transcription factors were predicted, of which the largest number of unique transcripts belonged to the MYB transcription factor family. These results contribute to a better understanding of the regulation of bud burst genes in perennial plants.Research Fund of The Scientific and Technological Research Council of Turkey [114O800]This research was supported by a Research Fund of The Scientific and Technological Research Council of Turkey (114O800)
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
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
Kışlık buğdaylarda (Kızıltan-91 and Bezostaja-01) doku kültürünün, rejenerasyonun ve agrobakteriuma dayalı transformasyon parametrelerinin optimizasyonu
No full textThe objective of this study was to optimize tissue culture and regeneration parameters of immature inflorescence culture of Triticum aestivum cv. Bezostaja- 01 and Triticum durum cv. Kızıltan-91. The effects of callus age and vernalisation time of explants on regeneration success were evaluated. For determination of optimum vernalisation time of immature inflorescence, plants subjected to 4°C for 1, 2, 3, 4, and 5 weeks, respectively. Tillers containing immature inflorescences were collected at the same time. Percentage of inflorescence formed tillers over total explants were reached the highest value, 79 %, at 4 weeks cold treated Kızıltan cultivar and, 73 %, at 5 weeks cold treated Bezostaja cultivar. Isolated immature inflorescences were put onto 2mg /L 2,4-dichlorophenoxyacetic acid and picloram containing callus induction medium for Kızıltan and Bezostaja cultures, respectively. Callus induction rate were found to be 100 % for Kızıltan and Bezostaja. These explants were taken to regeneration after 6, 9, 12 and 15 weeks of dark incubation period. The regeneration capacities of calli were determined as shooting percentage and data were collected after 4, 8, 12, and 15 week regeneration period. The highest shooting percentage of 69 %, were obtained from 6 weeks old calli produced from 4 weeks vernalised explants in Kızıltan cultures at the end of 15 weeks regeneration period. However, shooting percentage was 57.2 % for 9 weeks old calli while it decreases to 37.6 % in 12 weeks old calli and 44.2 % in 15 weeks old calli at the end of 15 weeks regeneration period. This showed that prolonged dark incubation period decreased regeneration capacity of the callus. However, there was no significant difference in regeneration capacities of calli produced from Bezostaja immature inflorescence and the highest shooting percentage was obtained from 9 weeks old calli producedM.S. - Master of Scienc
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