Environmental heterogeneity

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  • Foreword for Cary Conference X, “Ecosystem Function in Heterogeneous Landscapes.” Among the most difficult problems in the life sciences is the challenge to understand the details of how ecosystems/watersheds/landscapes function. Yet, the welfare of all life, not just the human species, depends upon the successful functioning of diverse and complicated ecosystems, each with various dimensions and compositions.

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  • Mining wastes can cause significant ecological destruction. Often, solid mine wastes are dumped into streams, destroying habitat and causing siltation and heavy metal and other contamination. Even when such wastes are stored out of water channels, trace materials can leach into surface waters and infiltrate into local groundwater. Fine- grained tailings can wash into local waterways and degrade streams by covering and filling coarser-grained substrates.

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  • Due to this very detrimental environmental hazard experienced during this period by Zanzibar islands, with very sensitive and fragile ecosystem the Ministry of Health and Social Welfare in collaboration with WHO decided to develop these official and very comprehensive guidelines based on the National Drug Policy, WHO guidelines and the Zanzibar Food, Drugs and Cosmetics Act No 2/2006. Therefore these guidelines give appropriate measures of safe disposal to minimize the risks that could happen due to pharmaceutical waste. ...

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  • Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài: Across-site heterogeneity of genetic and environmental variances in the genetic evaluation of Eucalyptus globulus trials for height growth...

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  • Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài: "Across-site heterogeneity of genetic and environmental variances in the genetic evaluation of Eucalyptus globulus trials for height growth"

    pdf9p toshiba5 19-09-2011 27 3   Download

  • While many studies have focused on estimating a relationship between pollution and health, they have largely neglected to consider that pollution exposure is endogenously determined if individuals make choices to maximize their well-being. People with high preferences for clean air may choose to live in areas with better air quality. People can respond to a wide range of readily available information on pollution levels by adjusting their exposure. Failing to appropriately account for such actions can yield misleading estimates of the causal effect of pollution on health. ...

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  • Alterations to fire regimes have resulted in many changes to the biological communities including changes in vegetation composition and structure and vegetation type conversions or ecosystem migrations. This text details many of these changes, explains how fire has changed as an ecosystem process, and provides insights for determining the direction that the changes might take in the future.

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  • Our final set of results addresses heterogeneity in the effects of television on test scores. The effects on verbal, reading, and gen- eral knowledge scores are most positive for children from house- holds where English is not the primary language, for children whose mothers have less than a high school education, and for nonwhite children.

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  • Protein glycation by methylglyoxal is a nonenzymatic post-translational modification whereby arginine and lysine side chains form a chemically heterogeneous group of advanced glycation end-products. Methylglyoxal-derived advanced glycation end-products are involved in pathologies such as diabetes and neurodegenerative diseases of the amyloid type.

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  • Although the psychosocial oncology literature is strong, substantial limitations and unanswered questions remain. Much of the research has focused on heterogeneous samples of patients who vary widely across disease site (e.g., melanoma vs. breast cancer), stage of progression (e.g., localized vs. metastatic), and phase of illness (e.g., initial diagnosis vs. long-term survival). The challenges patients face vary widely across these dimensions, and therefore, it is crucial for research designs to take this into consideration....

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  • There are strong interdependencies between banks and governments, through both balance sheet and contingent claim exposures. These interdependencies mutually reinforce the macroeconomic propagation of banking or sovereign market tensions. Second, given the fragmentation of some market segments and the setback to European banking sector integration, persistent cross-country heterogeneity needs to be considered. Third, a proper assessment of fi nancing conditions hinges on the distinction between demand and supply-side factors in credit intermediation.

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  • bR, N-like and O-like intermediate states of [ 15 N]methionine-labelled wild type and D85N⁄T170C bacteriorhodopsin were accumulated in native membranes by controlling the pH of the preparations. 15 N cross polariza-tion and magic angle sample spinning (CPMAS) NMR spectroscopy allowed resolution of seven out of nine resonances in the bR-state. It was possible to assign some of the observed resonances by using 13 C⁄ 15 N rota

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  • Heterogeneous nuclear ribonucleoprotein (hnRNP) D⁄AUF1 functions in mRNA genesis in the nucleus and modulates mRNA decay in the cyto-plasm. Although it is primarily nuclear, it shuttles between the nucleus and cytoplasm. We studied the nuclear import and export of the last exon-enco-ding sequence common to all its isoforms by its expression as a green fluor-escent protein-fusion protein in HeLa cells and by heterokaryon assay.

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  • Structural elucidation of the lipopolysaccharide (LPS) from three nontypeable Haemophilus influenzaeclinical isolates, 1209, 1207 and 1233 was achieved using NMR spectro-scopy and ESI-MS on O-deacylated LPS and core oligo-saccharide (OS) material as well as ESI-MS n on permethylated dephosphorylated OS. It was found that the organisms expressed a tremendous heterogeneous glyco-form mixture resulting from the variable length of the OS chains attached to the common structural element of H.

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  • Tyrosine hydroxylase (TH) demonstrates by two-dimen-sional electrophoresis amicroheterogeneitybothas a soluble recombinant humanTH(hTH1) andas amembrane-bound bovine TH (bTHmem). Part of the heterogeneity is likely due to deamidation of labile asparagine residues. Wild-type (wt)-hTH1was foundtobeasubstrate for theubiquitin(Ub) conjugating enzyme systemina reconstitutedin vitrosystem.

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  • The main focus of the book is the advances in telecommunications modeling, policy, and technology. In particular, several chapters of the book deal with low-level network layers and present issues in optical communication technology and optical networks, including the deployment of optical hardware devices and the design of optical network architecture. Wireless networking is also covered, with a focus on WiFi and WiMAX technologies.

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  • The epidemiology of infectious diseases is one of the great triumphs of applied ecology. In particular, the public health importance of parasites has lead to a large literature, exploring their impact on the population dynamics, population genetics and evolutionary biology of human populations. An important milestone was the Dahlem Conference on population biology of infectious diseases, held in 1981. The resulting book (Anderson and May 1982) lucidly summarised the contemporary state of parasite ecology and epidemiology.

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  • Some say that ‘the cockroach’ will be the last species on Earth to survive. Then it has been calculated that one gravid aphid, left to reproduce with zero mortality, will, after one year, cover the globe with an aphid layer over 140 km thick. Not forgetting too, that flies and fleas vector disease. So, why should we even consider conserving insects? Quite simply, without insects, the likelihood is that the world as we know it would be radically changed in a matter of days. Besides, it is only a tiny minority of insects that harm our lives.

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  • Complex Genetic Disorders The expression of many common diseases such as cardiovascular disease, hypertension, diabetes, asthma, psychiatric disorders, and certain cancers is determined by a combination of genetic background, environmental factors, and lifestyle. A trait is called polygenic if multiple genes contribute to the phenotype or multifactorial if multiple genes are assumed to interact with environmental factors. Genetic models for these complex traits need to account for genetic heterogeneity and interactions with other genes and the environment.

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  • Event detection is one of the required services in sensor network applications such as environmental monitoring and object tracking. Composite event detection faces several challenges.The first challenge is uncertainty caused by variety of factors, while the second one is heterogeneity of sensor nodes in sensing capabilities. Finally, distributed detection,which is vital to facilitate uncovering composite events in large scale sensor networks, is challenging.

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