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churchman A. T. 대한전기협회 1972 電氣協會誌 Vol.5 No.-
업무를 수행 할때에는 조명의 효과각 극히 중요시 되어야 함에도 불구하고 이것이 거의 무시되고 있다. 특정한 업무에 따라 적절한 조명속에서 일하는 것은 일의 능율을 올리고 피로 격감시키는 것이다. 이러한 점은 고용주나 고용인 모두에게 이익을 주는 것이다.
Kumar, Narender,Harashima, Hirofumi,Kalve, Shweta,Bramsiepe, Jonathan,Wang, Kai,Sizani, Bulelani L.,Bertrand, Laura L.,Johnson, Matthew C.,Faulk, Christopher,Dale, Renee,Simmons, L. Alice,Churchman, M American Society of Plant Biologists 2015 The Plant cell Vol.27 No.11
<P>Although they play roles in many different developmental processes, the biochemical function of SMR-type CDK inhibitors is conserved among land plants.</P><P>The best-characterized members of the plant-specific SIAMESE-RELATED (SMR) family of cyclin-dependent kinase inhibitors regulate the transition from the mitotic cell cycle to endoreplication, also known as endoreduplication, an altered version of the cell cycle in which DNA is replicated without cell division. Some other family members are implicated in cell cycle responses to biotic and abiotic stresses. However, the functions of most SMRs remain unknown, and the specific cyclin-dependent kinase complexes inhibited by SMRs are unclear. Here, we demonstrate that a diverse group of SMRs, including an SMR from the bryophyte <I>Physcomitrella patens</I>, can complement an <I>Arabidopsis thaliana siamese</I> (<I>sim</I>) mutant and that both Arabidopsis SIM and <I>P. patens</I> SMR can inhibit CDK activity in vitro. Furthermore, we show that Arabidopsis SIM can bind to and inhibit both CDKA;1 and CDKB1;1. Finally, we show that <I>SMR2</I> acts to restrict cell proliferation during leaf growth in Arabidopsis and that <I>SIM</I>, <I>SMR1/LGO</I>, and <I>SMR2</I> play overlapping roles in controlling the transition from cell division to endoreplication during leaf development. These results indicate that differences in SMR function in plant growth and development are primarily due to differences in transcriptional and posttranscriptional regulation, rather than to differences in fundamental biochemical function.</P>