Xem 1-20 trên 44 kết quả Temporal trends
  • Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Critical Care giúp cho các bạn có thêm kiến thức về ngành y học đề tài: Temporal trends and recent correlates in sedentary behaviours in Chinese children...

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  • The international significance of research into the sources, behaviour, fate, and effects of persistent organic pollutants (POPs) is exemplified by the Stockholm Convention for which the host organisation is the United Nations Environment Programme (UNEP). Following extensive negotiation, it was adopted on 22 May 2001, entered into force 90 days after the 50th party had ratified it on 17 May 2004, and by late 2008 there were over 180 participants (http://chm.pops.int/).

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  • This book proposes a framework for a national-scale program to monitor changes in mercury concentrations in the environment following the reduction of atmospheric mercury emissions. The book is the product of efforts initiated at a workshop held in Pensacola, Florida, in September 2003, involving more than 30 experts in the fields of atmospheric mercury transport and deposition, mercury cycling in terrestrial and aquatic ecosystems, and mercury bioaccumulation in aquatic food webs and wildlife.

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  • Temporal trends in unsafe abortion have been inconsistent internationally (figure 2). Between 1995 and 2000, a decline of 5 or more percentage points took place in the unsafe abortion rate in eastern, middle, and western Africa, the Caribbean, and Central America. Other developing areas had no appreciable change in the rate of unsafe abortion. 6 Unsafe abortions vary substantially by age across regions: adolescents (15–19 years) account for 25% of all unsafe abortions in Africa, whereas the percentage in Asia, Latin America, and the Caribbean is much lower (figure 3).

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  • Presence of epigenetic marks enables cells with the same genotype have potential to display different phenotypes and differentiate into many cell-types with different functions, and responses to environmental and intercellular signaling. For example, DNA methylation is essential for the process of imprinting. Imprinted genes are expressed from only one parental allele. This mono-allelic gene expression is directed by epigenetic marks established in the mammalian germ line and a single mutation, either genetic or epigenetic, can cause disease.

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  • Although there is plenty of literature on destination planning and development of facilities (Inskeep, 1991 and 1994; Pearce, 1989; Gunn, 1994; Davidson and Maitland, 1997), there are few textbooks examining destination marketing (Heath and Wall, 1992; Goodall and Ashworth, 1988) and even fewer illustrate destinations as an experience-provider for tourists and locals (Ryan, 1997 and 1991a). This is also reflected in the academic literature published in journals and other scientific publications.

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  • Accurate statistics on cancer occurrence and outcome are essential both for the purposes of research and for planning and evaluation programmes for cancer control (Parkin, 2006). Although tumours of thyroid account for only 1% of the overall human cancer burden, they represent the most common malignancies of the endocrine system and pose a significant challenge to pathologists, surgeons and endocrinologists. Among epithelial tumors, carcinomas of follicular cell origin far outnumber those of C-cell origin.

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  • Later elaborations on the mechanisms of repression versus dissociation posited that they corresponded to various views of the self-one that is vertically organized (such as in the case of repression) versus one that is horizontally aligned, with areas of incompatibility separated by dissociation (Mitchell & Black, 1995). Many of Janet’s ideas presented above received corroboration later from both clinical observations and neurobiological investigations and have subsequently been incorporated in contemporaneous pathogenetic models of dissociative disorders.

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  • This book will be of interest to anyone interested in the application of Tissue Engineering. It offers a wide range of topics, including the use of stem cells and adult stem cells, their applications and the development of a tailored biomaterial, highlighting the importance of cell-biomaterial interaction. It offers insights into a wide variety of cells and biomaterials, explaining the groundwork required to open the avenue to the next generation biotechnology, which is Tissue Engineering.

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  • The information has been organised thematically in possibly simple way. It concerns social nsurance benefi ts and some of non-insurance benefi ts that are, however, managed by ZUS, as a public institution servicing the social security system in Poland. The study also describes the general principles of operation of separate systems, which are not managed by ZUS: health insurance, family benefi ts, benefi ts in respect of unemployment as well as the scheme of social insurance of farmers.

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  • It was definitely a capital-K Knock, the kind of knock they Foley in for police flicks, with a lot of ominous reverb that cuts off sharply, whang, whang, whang. The thunder of authority on two legs. It even penetrated my headphones, shook all the way down to my balls with the premonition of something awful about to come.

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  • The changes discussed above under the three headings of the agricultural sector, the gender shift and veterinary education have significant implications for the veterinary business landscape across the broader veterinary sector, impacting beyond the practice wing of the profession. As mentioned at the outset of this chapter, to date, robust academic attention has not been paid to the implications of changes in these areas. Such implications will now be discussed under the relevant headings below. ...

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  • The USFS Forest Inventory and Analysis (FIA) program seeks to assess the condition and trend of the forests of the U.S. FIA recently assumed responsibility for all former Forest Health Monitoring program (FHM) plot work on a national level, and is currently active in 32 states. Lichen community monitoring was included in FIA in order to address key assessment issues such as the impact of air pollution on forest resources, spatial and temporal trends in biodiversity, and the sustainability of timber harvesting.

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  • The dataset contains information on name, date of birth, date of arrival in Germany, sex, country of origin, first city of residence and a unique code that identified members of the same family. After sample size calculation the cohort was restricted to a representative sample of 34,393 Aussiedler who were at least 15 years old when they migrated to Germany. To ascertain vital status of each cohort member until the 31st December 2005 a follow up procedure was performed: Letters were sent to local registry offices in the cities of residence.

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  • The papers of Long and Merton suggested interest rates and infla- tion as risk factors, but their models did not fully specify what all the hedge portfolios should be, or how many there should be. The APT specifies the factors only in a loose statistical sense. This leaves it up to empirical research to identify the risk factors or hedge portfolios. Chen et al. (1986) empirically evaluated several likely economic factors, and Chen et al. (1987) used these in an evaluation of equity mutual funds.

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  • With international funding, Dr. Mocumbi has already seen national lead- ership in pockets of Africa come together to refine strategies to improve health, and with local ingenuity, he avers, much more is possible. For example, an effort to train non–physicians to deliver care has the potential, Dr. Mocumbi believes, to help plug a gaping and deleterious hole in human resources capacity.

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  • the prevalence of HiV/aiDS among pregnant women is 0.9% (i.e. low for the region). Whilst 57% and 71% of women and men respectively have ever heard about aiDS, knowledge of prevention of transmission through the use of condoms was very low. there are currently no national guidelines for Prevention of Mother to child transmission (PMtct) or Highly active antiretroviral therapy (Haart). coverage for PMtct is accordingly very low: only 11 pregnant women living with HiV received PMtct services in 2007, an estimated coverage of 1% (11/940 women).

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  • Recent reviews have addressed issues of cigarette smoke exposure and various facets of reproduction including delayed time to conception, ovarian effects and premature menopause, implantation failure, fetal growth restriction and growth retardation, placental abnormalities, reduced fecundity, congenital abnormalities, and effects on male reproduction [32-34]. However, most prior reviews have not considered smoke's interaction with the oviduct, an organ vital to reproduction.

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  • Respondents were also asked about the importance of religion for them and about their religious practices. Results are shown in Table 10 for Buddhists and Moslems. Given the small number of Moslems in the sample, caution is appropriate when interpreting the results. Clearly religion is very important for a substantial majority of Cambodian elders. Three fourths of Buddhists and over 90% of Moslems in our sample indicated that religion was very important for them. This varied very little across gender and residence.

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  • Most of the VOCs probably derived from indoor sources. However, the wall cavity was an apparent source of acetaldehyde, toluene and xylenes and the belly space was a source of 2-butanone, lower volatility aldehydes and aromatic hydrocarbons. Indoor minus outdoor VOC concentrations varied with time. Adjusted formaldehyde concentrations exhibited the most temporal variability with concentrations ranging from 25 µg m-3 to 128 µg m-3 and the lowest concentrations occurring in winter months when indoor RH was low.

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