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Haim Hacham Steven E. Freeman Richard W. Gange Daniel J. Maytum John C. Sutherland Betsy M. Sutherland † 《Photochemistry and photobiology》1990,52(4):893-896
A previous report [Freeman et al. (1986) Photochem. Photobiol. 43S, 93S] indicated that irradiation of human skin in situ with 385 or 405 nm radiation produced detectable levels of pyrimidine dimers in DNA. Since these wavelengths are absorbed poorly by DNA, these results suggested that DNA damage was sensitized by other absorbing molecules present in skin. Examination of two experimental aspects of the previous work indicates that (1) the static gel electrophoresis method for DNA dispersion used in lesion determination gave accurate values of the levels of induced dimers, and (2) the DNA damage apparently induced by 385 nm was actually induced by shorter wavelength UV present in the 20 nm bandpass beam of the monochromator. The current results indicate that monochromatic 385 and 405 nm radiation are ineffective in dimer production in human skin in situ. 相似文献
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Accumulative evidence suggests that the implementation of international standard operating procedures, induce, by their virtues, major organizational changes. These changes are both cultural and behavioral including changes in decision-making processes, organizational norms, and values. The decision of any organization to adopt quality assurance, specifically via accreditation, should be regarded as a strategic one. As such, it prerequisites top management commitment, budgeting the process and promoting active inter-collaboration of all organizational members. The accreditation process according to ISO/IEC 17025:1999 of the Haifa Public Health Laboratory, will be used as a case study. A number of practical benefits of such organizational changes will be demonstrated and discussed, among them improved quality customer service and handling customer's complaints, establishing multichannel communication, enhanced interlaboratory collaboration and coordination. It is important to note that the accreditation process was accompaniment by extensive training of both management and employees on-site and off-site. 相似文献
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Haim Hacham Nurit Tetro Salit Kochavi-Azolai Nava Stern Dana Mizrahi Anna Lisenker Emanuel Gazit 《Accreditation and quality assurance》2007,12(8):409-413
The Department of Public Health Laboratories consists of five major laboratories located across the country of Israel: four
environmental laboratories performing microbiological and chemical testing of food and water products [accredited according
to International Organization for Standardization (ISO) 17025 since 1999) and a fifth laboratory that is dedicated to virology
testing (certified according to ISO 9000 since 2003). Historically, each laboratory operated independently and developed its
own quality assurance (QA). On November 2004, an important strategic decision was made: to unify all five laboratories’ QA
systems conformed to ISO 17025, ISO 15189, and ISO 9000—a transition from five laboratories operating independently in the
field of QA toward establishing a multisite laboratory. This process was considered and visualized as a major organizational
change and therefore raised some resistance among both QA managers and the professional laboratories’ management. Thus, it
was necessary to overcome the resistance and at the same time induce thoughts of ways of reshaping and formatting the new
and uniform quality manual and uniform standard operating procedures (SOPs). In September 2005, the first phase of the process
was completed, and all four environmental public health laboratories successfully passed a reaccreditation audit using a uniform
QA manual guide and partially uniform SOPs. We shall share our experience and discuss the major contributions of this process
to overall laboratory management.
Presented at the 3rd International Conference on Metrology, November 2006, Tel Aviv, Israel. 相似文献
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