1,720,992 research outputs found
The homeodomain-leucine zipper ATHB23, a phytochrome B-interacting protein, is important for phytochrome B-mediated red light signaling
No full textPhytochromes are red (R)/far-red (FR) photoreceptors that are central to the
regulation of plant growth and development. Although it is well known
that photoactivated phytochromes are translocated into the nucleus where
they interact with a variety of nuclear proteins and ultimately regulate
genome-wide transcription, the mechanisms by which these photoreceptors
function are not completely understood. In an effort to enhance our
understanding of phytochrome-mediated light signaling networks, we
attempted to identify novel proteins interacting with phytochrome B (phyB).
Using affinity purification in Arabidopsis phyB overexpressor, coupled with
mass spectrometry analysis, 16 proteins that interact with phyB in vivo
were identified. Interactions between phyB and six putative phyB-interacting
proteins were confirmed by bimolecular fluorescence complementation
(BiFC) analysis. Involvement of these proteins in phyB-mediated signaling
pathways was also revealed by physiological analysis of the mutants defective
in each phyB-interacting protein.We further characterized the athb23 mutant
impaired in the homeobox protein 23 (ATHB23) gene. The athb23 mutant
displayed altered hypocotyl growth under R light, as well as defects in phyBdependent
seed germination and phyB-mediated cotyledon expansion. Taken
together, these results suggest that the ATHB23 transcription factor is a novel
component of the phyB-mediated R light signaling pathway.121411sciescopu
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
식물 소기관 간의 소통을 통한 잎 노화 조절: 전행성 신호 전달
No full textLeaf senescence, Anterograde signaling, Sigma factors, Pentatricopeptide repeat proteinⅠ. General Introduction 1
1.1 Introduction to leaf senescence 1
1.2 Introduction to organelle coordination 1
1.3 Chloroplast-encoded gene expression by sigma factors in transcriptional level 2
1.4 Chloroplast-encoded gene expression by pentatricopeptide repeat protein at post-transcriptional level 2
1.5 Object 3
ⅠI. Identification of the Regulatory Factor that Controls Sigma Factors
Expression During Leaf Senescence in Arabidopsis thaliana 4
2.1 Literature survey 4
2.2 Method and Material 4
2.3 Results 7
2.3.1 Investigation of upstream regulators of SIGs during senescence 7
2.3.2 PIF4 and PIF5 are direct transcription factors of some sigma factors 9
2.3.3 PIF4 and PIF5 suppress the expression of SIG2, SIG3, and SIG5 during darkness-induced senescence 10
2.3.4 SIG3 exhibits a delayed senescence phenotype under natural conditions 11
2.3.5 Deficiency of SIG3 causes leaf senescence due to decreased function of PSII 13
2.4 Discussion 14
IIⅠ. Investigation of the Senescence Phenotypes of Various Pentatricopeptide Repeat Proteins 16
3.1 Literature survey 16
3.2 Method and Material 16
3.3 Results 18
3.3.1 PPR genes regulate leaf senescence under natural conditions 18
3.3.2 svr7 is sensitive to oxidative stress 20
3.3.3 Impairment of chloroplast protein complex composition of svr7 is associated with leaf senescence 21
3.4 Discussion 23
References 25
요약문 28MasterdCollectio
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
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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