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- BookDavid Mortimer and Sharon T. Mortimer.Summary: This essential survival guide for successfully managing the modern-day IVF clinic condenses a wealth of expertise and experience from the authors in troubleshooting and implementing quality management in the IVF laboratory. with high-profile media coverage of mistakes at IVF clinics, and escalating regulatory scrutiny, there is increasing pressure for professional accreditation. Modern accreditation schemes, which are largely based on the principles of ISO 9001 and related standards, require Quality Systems. Yet quality management beyond basic assay quality control is often poorly understood by biomedical scientists outside clinical chemistry laboratories. Quality and risk management are thus becoming hot topics for those working in IVF clinics and this book brings together, for the first time in one place, the basics of these essential aspects of laboratory management. The focus on taking a holistic approach to 'prophylactic management' - prevention rather than cure - will be welcomed by all scientists working in IVF.Digital Access Cambridge 2005
- ArticleAĭzenberg OA, Samoĭlenko II, Fradkin GE.Genetika. 1977;13(11):1988-96.Thymine requiring mutants of rec+ and recB- Escherichia coli strains have been tested for their response to thymine deprivation. Exonuclease V-deficient mutant is less sensitive to thymine deprivation than the wild type strain, because there is no lag period at thymineless death of recB- thy- cells. However, the mechanism of thymineless death of thy- rec+ and thy- recB- cells may be different. Two types of thymineless death are proposed to exist. The first type is due to DNA primary structure damages (single-strand breaks or gaps), accompanied by DNA degradation. The restoration of the balance disturbed by the thymine deprivation between DNA and protein synthesis rates by their balanced inhibition promotes a complete repair of structural damages in DNA and prevents the death of rec+ cells. The second type of thymineless death is not linked with the formation of DNA damages, and this is observed in recB- thy- mutant, defective in exonuclease V.