1,722,929 research outputs found
Biocontrol of Bacterial Fruit Blotch by Bacillus subtilis 9407 via Surfactin-Mediated Antibacterial Activity and Colonization
Get PDFIn this study, Bacillus subtilis 9407 showed a strong antibacterial activity against Acidovorax citrulli in vitro and 61.7% biocontrol efficacy on melon seedlings 4 days post inoculation under greenhouse conditions. To understand the biocontrol mechanism of B. subtilis 9407, identify the primary antibacterial compound and determine its role in controlling bacterial fruit blotch (BFB), a srfAB deletion mutant (ΔsrfAB) was constructed. The ΔsrfAB which was deficient in production of surfactin, not only showed almost no ability to inhibit growth of A. citrulli but also decreased biofilm formation and reduced swarming motility. Colonization assay demonstrated that B. subtilis 9407 could conlonize on melon roots and leaves in a large population, while ΔsrfAB showed a four- to ten-fold reduction in colonization of melon roots and leaves. Furthermore, a biocontrol assay showed that ΔsrfAB lost the biocontrol efficacy. In summary, our results indicated that surfactin, which consists of C13- to C16-surfactin A was the primary antibacterial compound of B. subtilis 9407, and it played a major role in biofilm formation, swarming motility, colonization and suppressing BFB. We propose that the biocontrol activity of B. subtilis 9407 is the results of the coordinated action of surfactin-mediated antibacterial activity and colonization. This study reveals for the first time that the use of a B. subtilis strain as a potential biological control agent could efficiently control BFB by producing surfactin
Skid test evaluation of PBX 9407. Period covered: January--March 1976. Normal process development endeavor No. 216
No full textSkid testing was done on PBX 9407 (nominal composition 94/6 RDX/Exon 461 by weight) to determine its sensitivity. Sensitivity of PBX 9407 appears to be similar to that of LX-04-1
California Poll: 9407 -- October 21-30, 1994
No full textThe Field Poll, established in 1945 as The California Poll by Mervin Field, has operated continuously as an independent, non-partisan, media-sponsored public opinion news service. Each year the Field Polls cover a wide range of political and social topics examining California public opinion. Continuing measures are made of voter support for leading political figures vying for major state and federal offices, job ratings of important political figures and reactions to significant political events. Voter awareness, understanding and predispositions of major campaign issues and salient statewide ballot propositions are also tracked over time. For poll 9407 N=1404
PENGARUH SUDU HYDROFOIL NACA 9407 TERHADAP EFISIENSI TURBIN ALIRAN SILANG (CROSS-FLOW) PEMBANGKIT LISTRIK TENAGA MIKROHIDRO (PLTMH)
Get PDFPerancangan dan pembuatan runner turbin cross flow mempunyai pengaruh yang besar terhadap efisiensinya. Hal-hal yang harus dipertimbangkan dalam perancangan dan kontruksi roda jalan turbin aliran silang diantaranya adalah jumlah sudu, ketebalan sudu, kelengkungan sudu dan bentuk profil sudu. Penelitian ini bertujuan untuk mengetahui efisiensi penggunaan jenis sudu hydrofoil NACA 9407 dan sudu radius pada konstruksi mikrohidro aliran silang. Manfaat dari penelitian ini yaitu untuk mendapatkan informasi penggunaan hydrofoil NACA 9407 pada runner turbin air crossflow pembangkit listrik tenaga mikrohidro. Hasil penelitian diharapkan dapat dijadikan bahan pertimbangan dalam menentukan jenis sudu turbin yang tepat agar kinerja turbin menjadi optimal. Penelitian dilakukan dengan studi eksperimental menggunakan runner berdiameter 120 mm, panjang 120 mm, jumlah sudu 12 buah. Pengujian dilakukan pada sistem Pembangkit Listrik Tenaga Mikrohidro (PLTMH) skala laboratorium dengan membandingkan runner dengan mengunakan sudu Hydrofoil NACA 9407 dan sudu radius biasa. Dalam penelitian ini ketinggian muka air/head hasil pengukuran pada pengujian adalah 4 m dan variasi pembebanan pada runner dari 0 kg (tanpa pembebanan) 1 kg dan 2 kg menggunakan alat uji timbangan tarik (rope brake). Putaran runner diukur menggunakan tachometer. Hasil dari penelitian didapatkan efisiensi yang tertinggi pada turbin crossflow sudu NACA 9407 dapat mencapai nilai 0,75 % pada putaran poros sebesar 128,4 (RPM) pada pembebanan poros 2 kg dan daya turbin tertinggi sebesar 1,344 Watt
Pengaruh Sudu Hydrofoil Naca 9407 Terhadap Efisiensi Turbin Aliran Silang (Cross-flow) Pembangkit Listrik Tenaga Mikrohidro (Pltmh)
No full textPerancangan dan pembuatan runner turbin cross flow mempunyai pengaruh yang besar terhadap efisiensinya. Hal-hal yang harus dipertimbangkan dalam perancangan dan kontruksi roda jalan turbin aliran silang diantaranya adalah jumlah sudu, ketebalan sudu, kelengkungan sudu dan bentuk profil sudu. Penelitian ini bertujuan untuk mengetahui efisiensi penggunaan jenis sudu hydrofoil NACA 9407 dan sudu radius pada konstruksi mikrohidro aliran silang. Manfaat dari penelitian ini yaitu untuk mendapatkan informasi penggunaan hydrofoil NACA 9407 pada runner turbin air crossflow pembangkit listrik tenaga mikrohidro. Hasil penelitian diharapkan dapat dijadikan bahan pertimbangan dalam menentukan jenis sudu turbin yang tepat agar kinerja turbin menjadi optimal. Penelitian dilakukan dengan studi eksperimental menggunakan runner berdiameter 120 mm, panjang 120 mm, jumlah sudu 12 buah. Pengujian dilakukan pada sistem Pembangkit Listrik Tenaga Mikrohidro (PLTMH) skala laboratorium dengan membandingkan runner dengan mengunakan sudu Hydrofoil NACA 9407 dan sudu radius biasa. Dalam penelitian ini ketinggian muka air/head hasil pengukuran pada pengujian adalah 4 m dan variasi pembebanan pada runner dari 0 kg (tanpa pembebanan) 1 kg dan 2 kg menggunakan alat uji timbangan tarik (rope brake). Putaran runner diukur menggunakan tachometer. Hasil dari penelitian didapatkan efisiensi yang tertinggi pada turbin crossflow sudu NACA 9407 dapat mencapai nilai 0,75 % pada putaran poros sebesar 128,4 (RPM) pada pembebanan poros 2 kg dan daya turbin tertinggi sebesar 1,344 Watt
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
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
- …
