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外置式循环流化床锅炉超低氧量运行讨论
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作者 王俊宏 余闻闻 杨坚 《电力设备管理》 2023年第2期272-274,共3页
本文讨论了循环流化床锅炉正常运行时的氧量控制范围,指出针对带外置式换热器的循环流化床锅炉,因其燃料在炉内的有效停留时间较长,可以在超低氧量状态下运行,相较于常规氧量运行状态,此种方式下锅炉有明显的运行经济性。
关键词 循环流化床锅炉 外置床 超低氧量 运行经济性
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Antiaging activity of low molecular weight peptide from Paphia undulate 被引量:2
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作者 陈忻 蔡冰娜 +3 位作者 陈华 潘剑宇 陈得科 孙恢礼 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2013年第3期570-580,共11页
Low molecular weight peptide (LMWP) was prepared from clam Paphia undulate and its antiaging effect on D-galactose-induced acute aging in rats, aged Kunming mice, ultraviolet-exposed rats, and thermally injured rats w... Low molecular weight peptide (LMWP) was prepared from clam Paphia undulate and its antiaging effect on D-galactose-induced acute aging in rats, aged Kunming mice, ultraviolet-exposed rats, and thermally injured rats was investigated. P. undulate flesh was homogenized and digested using papain under optimal conditions, then subjected to Sephadex G-25 chromatography to isolate the LMWP. Administration of LMWP significantly reversed D-galactose-induced oxidative stress by increasing the activities of glutathione peroxidase (GPx) and catalase (CAT), and by decreasing the level of malondialdehyde (MDA). This process was accompanied by increased collagen synthesis. The LMWP prevented photoaging and promoted dermis recovery and remission of elastic fiber hyperplasia. Furthermore, treatment with the LMWP helped to regenerate elastic fibers and the collagen network, increased superoxide dismutase (SOD) in the serum and significantly decreased MDA. Thermal scald-induced inflammation and edema were also relieved by the LWMP, while wound healing in skin was promoted. These results suggest that the LMWP from P. undulate could serve as a new antiaging substance in cosmetics. 展开更多
关键词 Paphia undulate low molecular weight peptide ANTIAGING antiultraviolet radiation skin woundhealing in scald rats
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