Sex determination

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  • Teleosts possess a variety of mechanisms for sex determination and differentiation. Sex steroids and temperature play an important role in the regulation of sex gonadal differentiation. Patterns of gene-initiated sexual differentiation are diverse, and species may or may not exhibit sexual dimorphic expression depending on spacing and timing of gene expression, organs, species and stage of fi sh.

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  • Gen mã hoá vùng xác định giới tính trên nhiễm sắc thể Y (SRY – sex determining region Y) ở một số các thể người Việt Nam Phát triển công nghệ tế bào gốc phục vụ trị liệu. Xây dựng các hệ thống nuôi cấy tế bào động vật phục vụ công tác chẩn đoán và sản xuất protein tái tổ hợp. Nghiên cứu tạo động vật chuyển gen và động vật nhân bản.

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  • When the groundwork for the fi fth edition of Clinical Periodontology and Implant Dentistry began in early 2007, it became clear that we had reached a fork in the road. It has always been my intention that each successive edition of this work should refl ect the state of the art of clinical periodontology and, in doing such, should run the gamut of topics within this subject area.

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  • Tham khảo sách 'clinical periodontology and implant dentistry fifth edition: volume 1 basic concepts', y tế - sức khoẻ, y học thường thức phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • Moreover, one's labour market status may be expected to have a (reverse) causal effect on current and future health. In this paper we analyse the relative importance of these endogeneity and measurement issues in the context of a model of early retirement decisions. We state assumptions under which we can use relatively simple methods to assess the relative importance of state dependent reporting errors in individual responses to health questions. The estimation results indicate that among respondents...

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  • University students go on field research trips or excursions during the low season. Therefore, destinations have to identify the seasonality patterns of their various markets and attract compatible segments, which will enable them to maximise their total yield (both average expenditure and occupancy levels) (O’Brien, 1996). It is also important to understand other factors that influence the decision of consumers to purchase. The social status and peer groups of consumers often influence what is acceptable and desirable as a destination.

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  • Tham khảo sách 'clinical periodontology and implant dentistry fifth edition: volume 2 clinical concepts_2', y tế - sức khoẻ, y học thường thức phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • Among seniors, food choice and related activities are affected by health status, biological changes wrought by aging and functional abilities, which are mediated in the larger arena by familial, social and economic factors. Determinants of healthy eating stem from individual and collective factors. Individual components include age, sex, education, physiological and health issues, psychological attributes, lifestyle practices, and knowledge, attitudes, beliefs and behaviours, in addition to other universal dietary determinants such as income, social status and culture.

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  • Forensic dentistry, like all the forensic sciences, has come a long way since the publication of the last textbook on forensic dentistry. The editors would like to thank the many students and other interested individuals who, over the years, have asked questions that have stimulated some of the answers found in this text. We appreciate the opportunity to share this material and have assembled, we think, an outstanding list of contributors to this topic of forensic dentistry.

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  • This book is designed to explain to dental students the processes of diagnosis and treatment planning, through consideration of clinical cases and problems associated with aspects of all dental specialties. It presents a series of case histories from all the major areas of dentistry, and uses a question-and-answer format to guide readers through the process of examination, differential diagnosis, investigations, diagnosis and treatment. It prepares readers for the wide variety of problems likely to be encountered in clinical practice.

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  • The Master of Science in Advanced Business Studies is mainly designed to offer students with a background in business or management science an additional and advanced curriculum in business research methodology. The programme allows participants to deepen their knowledge in a number of substantive areas, both conceptually and methodologically. Its courses are not designed to offer a general management background, but instead to provide in-depth, specialised treatment of business research methodology.

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  • Gen giới tính ở người Gen xác định nam giới Gen nam tính SRY (Sex determining region Y) được phát hiện vào năm 1990 trong một số trường hợp ngoại lệ không tuân theo nguyên tắc XX là nữ và XY là nam. Đã tìm thấy người nam bình thường có XX (nhưng bất thụ) có SRY trên một trong 2 nhiễm sắc thể X và người nữ bình thường mang XY nhưng mất SRY trên nhiễm sắc thể Y.

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  • As most societies define adolescence and youth in terms of both age and life circumstances, there is no universal agreement on what is a ‘young person’. The national legal age for political participation and the availability of data on different age groups can also determine how societies define youth. The World Health Organization defines young people as those from 10 to 24 years of age, including adolescents (10–19 years) and youth (15–24 years). IPPF uses the terms young people, youth and adolescents interchangeably to refer to people who are between 10 and 24 years.

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  • Chapter 16 - Gene regulation in eukaryotes. The main contents of this chapter include all of the following: Overview of eukaryotic gene regulation, control of transcription initiation, chromatin structure and epigenetic effects, regulation after transcription, a comprehensive example: sex determination in Drosophila.

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  • Overall, there are marginally more men than women in Europe, with the proportion of women increasing in older age categories. In 2005, there were approximately 15% more women than men among those aged 65-69 and almost two times more women than men aged over 80, leading to a total of 43% more women than men aged 65 and over (EUROSTAT 2008a, 2008b). In all European countries, life expectancy is greater for women than for men, with the largest gap between the sexes in Lithuania (11.7 years) and the smallest in Iceland (3.4) (based on 2006 data). Eurostat predictions indicate that in...

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