منابع مشابه
Turned on by genotoxic stress
Genomic stability is crucial to maintain cell viability and avoid errors in control of proliferation that often lead to disease. Cell cycle checkpoints have evolved as molecular mechanisms to prevent this problem. DNA damage or DNA replica-tion stress during S phase activates the intra-S phase checkpoint, which ensures faithful DNA replication by multiple mechanisms, including inducing expressi...
متن کاملPlant retrotransposons: Turned on by stress
Virtually all genomes contain transposable elements. In some organisms, especially plants, transposable elements or sequences derived from them can exceed 50 % of genomic DNA. Some people believe that these elements are simply parasitic entities that flourish because they can out-replicate their host, the genome of which provides numerous safe havens both within and between genes [1]. According...
متن کاملRelationship between Coverage and Surface Residual Stress
Controlled, uniform, peening has been used to impose precise cov onto mild steel plate specimens. This was achieved by using an the specimens under a single, precision-loaded, 2mm diameter studies have revealed a surprising relationship between percent surface residual stress. Stress increases almost linearly with low coverages but reaches a maximum at about 80% coverage. At 100% coverage the i...
متن کاملCharacteristics of Residual Stress Profiles in Hard Turned vs. Ground Surfaces with and Withouta White Layer
There exists some inconsistence regarding the true residual stress profiles by hard turning and grinding AISI 52100 steel (62 HRc). This study aims to clarify the pressing issues for five surface types: hard turned fresh, hard turned with a white layer, ground fresh, ground with a white layer, and as-heat-treated. The key findings are: (i) hard turned fresh surfaces produce surface compressive ...
متن کاملProcessing Effects on Residual Stress
The goal of this paper is to address three key questions. First, what are residual stresses? Second, what causes them? And third, are they good or bad in terms of performance of springs? The first question will be addressed by beginning with some rudimentary definitions and discussion. The second will be addressed with a process-by-process evaluation of spring manufacturing. Each process will b...
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ژورنال
عنوان ژورنال: Journal of the Japan Society of Precision Engineering
سال: 1960
ISSN: 0374-3543
DOI: 10.2493/jjspe1933.26.590