Xem 1-20 trên 162 kết quả Compositional changes
  • Evidence grows daily of the rapid changes in climate due to human activities and their impact on plants and animals. Plant function is inextricably linked to climate and atmospheric carbon dioxide concentration. On the shortest and smallest scales the climate affects the plant’s immediate environment and thus directly influences physiological processes. On longer and larger time and space scales climate influ- ences species distribution and community composition and determines what crops can be viably produced in managed agricultural, horticultural and forestry ecosys- tems.

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  • Genetically modified foods and food products derived from genetically engineered organisms are among a number of biotechnological developments intended to improve shelf life, nutritional content, flavor, color, and texture, as well as agronomic and processing characteristics. Although in popular parlance the term genetically modified often is used interchangeably with genetically engineered, in this report genetic modification refers to a range of methods used to alter the genetic composition of a plant or animal, including traditional hybridization and breeding.

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  • The development of concept in structural morphology lets description the location of nickel nanoclusters in conductive organic polymers, which may be a new kind of structure in conductive organic polymer composites family. As a new route, such the development was supported by electrochemical two-pot process, on which polianiline containing nanoclusters of nickel incorporated in layer by layer were prepared, in H2SO4 0.1 M solutions. The presence of nickel nanoclusters in polymer matrix and the changes in morphology were confirmed by SEM/EDS

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  • In conjunction with this instrumental variables approach, we include in- dividual fixed effects to control for observable and unobservable individual characteristics that are fixed over time, such as gender, race, or average risk tolerance over the sample period. Because our sample is restricted to “natives” (whom we also refer to as “nonmovers”), the individual fixed effects also con- trol for time-invariant community characteristics such as the average level of financial sophistication of a community over the sample period.

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  • Triacylglycerols secreted by liver and carried by very low density lipoprotein (VLDL) are hydrolysed in circulation by lipoprotein and hepatic lipases. These enzymes have been shown to have positional and fatty acid specificityin vitro.If there were specificity in basal lipolysisin vivo, triacylglycerol compositionsofcirculatingandnewlysecretedVLDLwould be different. To study this we compared the composition of normal fasting VLDL triacylglycerol of Wistar rats to that obtained after blocking lipolysis by Triton WR1339, which increasedplasmaVLDL triacylglycerol concentrationabout 4.

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  • The biological changes underlying the transition process from gingival health to early inflammatory changes involve local increase in vascular permeability, edema and the recruitment and activation of polymorphonuclear neutrophils (PMN) (Delima and Van Dyke 2003). Acquired immune response becomes involved once antigen-presenting cells interact with immunocompetent cells, such as T and B lymphocytes, leading to the expansion of antibody-secreting plasma cells and the development of the chronic lesion (Gemmell and Seymour 2004).

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  • Histological assessment showed that independently of the etiological factor involved, changes of the mucosa refer both to the gingival epithelium and the lamina propria (Banita et al., 2008, 2011). There is now general agreement that all gingival overgrowth lesions contain fibrotic or expanded connective tissue with various levels of inflammation and an enlarged gingival epithelium. As soon as plaque accumulates adjacent to the gingival margin, inflammatory cells infiltrate in the subjacent connective tissue and initiate its destruction.

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  • Gingivitis and periodontitis are the two main periodontal diseases and may be present concurrently. Gingivitis is a form of periodontal disease in which gingival tissues are inflamed but their destruction is mild and reversible while periodontitis is a chronic inflammatory response to the subgingival bacteria with irreversible changes (Armitage, 1999). Periodontium destruction is characterized by loss of connective tissue attachment and bone around the teeth in conjunction with the formation of periodontal pockets due to apical migration of the junctional epithelium (Champagne et al.

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  • Công nghệ nano đã được phát triển rộng khắp trong thập kỷ qua và có thể chế tạo ra nhiều vật liệu mới có phạm vi ứng dụng tiềm năng chẳng hạn như các ống nano các bon. Ống nano các bon bao gồm các phân tử các bon hình trụ có đường kính vài nano mét - 1 nano mét bằng 1 phần triệu của 1 mm.

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  • Nature creates the best ingredients and combining them is a mixture materials. So, get inspiration for new designs of their intended use. We make new construction, the new artificial materials and evaluate them before use. Composites are formed from components with high-tech materials potential. This potential is wide is wide variation of materials and structures construction when new updates are invented every day.

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  • Composite applications aid businesses by stitching together various componented business capabilities. In the current enterprise scenario, empowering business users to react quickly to the rapidly changing business environment is the top most priority. With the advent of composite applications the 'reuse' paradigm has moved from the technical aspect to the business aspect. You no longer re-use a service but re-use a business process. Now, enterprises can define their own behaviors optimized for their businesses through metadata and flows.

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Trichoderma viride cellulase induces resistance to the antibiotic pore-forming peptide alamethicin associated with changes in the plasma membrane lipid composition of tobacco BY-2 cells

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  • Beer has been a popular beverage for thousands of years and brewing is often described as the oldest biotechnological process. Over the years the brewmaster’s art has been supplemented by vast increases in our knowledge of the chemistry and biochemistry both of the ingredients and of the changes taking place to those ingredients during brewing. Together these contribute to give the products we recognise today - a wide range of different but consistently high quality beer types.

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  • Nhờ vào sự ưu đãi của thiên nhiên, Đồng Bằng Sông Cửu Long (ĐBSCL) với tổng diện tích mặt nước 954.350 ha, chiếm gần 1/4 diện tích của ĐBSCL, trong đó diện tích mặt nước ngọt chiếm tới 641.350 ha với hệ thống sông ngòi chằng chịt thuộc hai nhánh sông Tiền và sông Hậu, là điều kiện thuận lợi cho nghề nuôi thủy sản nước ngọt phát triển mạnh mẽ.

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  • The late Neogene (the period between − 14 and − 2.4 Ma) is one of the most interesting phases in understand the present conWguration of terrestrial ecosystems. It was during this time that the change took place from the middle Miocene dominant subtropical forests that stretched across southern Europe and western Asia to a more open but still wooded biotope that now prevails in warm–temperate areas. This change in vegetation, which strongly aVected the composition of mammalian faunas, seems to be linked to the rapid spread of grasses around 8–10 Ma ago....

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  • The broad aim of this research is to strengthen the link between the social and environmental sciences, and to foster a change in observed practices by stimulating a dialogue among those involved in the industry, thereby contributing to sustainable development of the local economy. Our scientific aim is to combine a systematic study of the dynamics of the firms involved in the Jepara industrial complex with a quantitative analysis of flows among them, and between them and markets elsewhere. In this report, we summarise the main features of this complex.

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  • The current study was undertaken in a new manufactured house set up as a research facility. The plan was to conduct longitudinal measurements of VOC concentrations in the house along with measurements of key physical parameters including house air change rate, indoor and outdoor temperature and relative humidity, and wind conditions over a period of approximately one year. The primary objective was to evaluate changes in the emissions of formaldehyde and other VOCs in response to time, house air change rate, and the other parameters.

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  • The decline in the economy, particularly in the second half of 2008, likely contributed to smaller gains in participants relative to previous years and a number of programs reported losses in the total number of participants. Perhaps surprisingly, nonresidential participant growth was on par with 2007; while the reason for this increase is unclear, one possible explanation could be heightened interest in renewable energy issues in an election year in which renewables and climate change were a focus.

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  • One of the most fundamental Dodd-Frank changes affecting private funds is the elimination of the “private advisers” exemption from registration with the SEC as an investment adviser (also known as the “15-client” exemp- tion). In its place, Dodd-Frank created several new, but less comprehensive, exemptions, with the result that most U.S.

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  • The following sections provide an overview of the technical and qualitative characteristics of a wide range of alternative fuels that can replace coal in cement kilns. These fuels include agricultural and non-agricultural biomass, chemical and hazardous wastes, petroleum-based wastes, and miscellaneous waste fuels. Each of these alternatives are described in detail, including a discussion of average substitution rates, energy and water content of the fuels, carbon dioxide emissions factors, and change in carbon emissions per ton1 of coal replacement.

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