نتایج جستجو برای: 1307
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در مقالۀ حاضر به مسئلۀ آموزشگاهها و هنرستانهای فنی و حرفهای مخصوص رشتۀ آهن طی سالهای 1304-1320ش پرداخته شده و ضرورتهای تأسیس این مؤسسات و نقش آنها در تربیت نیروی انسانی برای صنعت راهآهن به بحث گذاشته شده است. فرضیۀ اصلی مقاله این است که به دلیل حضور افرادی مثل علیاکبرخان داور که به مقولۀ اقتصاد ملی به مثابه تأمین کننده دولت ملی تأکید میکردند، مقولۀ راهآهن به عنوان مصداق بارز شکلگیری ا...
Geographic maldistribution of dermatologists in the U.S is suggested to contribute racial and ethnic disparities access dermatologic care based on limited evidence. We evaluated associations between dermatologist supply population sociodemographic geographic factors. performed a cross-sectional analysis 3,108 counties from contiguous U.S. County-level data counts were obtained 2018 American Com...
This work encompasses the development of low-viscosity cyclic oligomer underfill formulations that cure without heat evolution. Boron nitride, silica-coated aluminum nitride, and alumina ceramic powders were used as fillers in cyclic butylene terephthalate oligomer melts. The melts were heated with a suitable catalyst to induce polymerization. The effects of the filler type and composition on t...
Relating molecular variation to phenotypic diversity is a central goal in evolutionary biology. In Arabidopsis thaliana, FLOWERING LOCUS C (FLC) is a major determinant of variation in vernalization--the acceleration of flowering by prolonged cold. Here, through analysis of 1307 A. thaliana accessions, we identify five predominant FLC haplotypes defined by noncoding sequence variation. Genetic a...
2014 We consider the effects of partial frustration, i.e. frustration in a restricted number of dimensions ; they are investigated in a typical model, the stacked triangular antiferromagnetic Ising model. For this purpose we studied its quantum equivalent, the 2D-triangular model with a transverse field, through finite size analysis. They both exhibit true long range order. These considerations...
Zygosaccharomyces bailii ISA 1307 and the type strain of this spoilage yeast show a diploid DNA content. Together with a rather peculiar life cycle in which mitotic but no meiotic spores appear to be formed, the diploid DNA content explains the observed difficulties in obtaining auxotrophic mutants. Mitotic chromosome loss induced by benomyl and selection on canavanine media resulted in three h...
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