Habitat fragmentation is the primary cause of the loss of biodiversity and ecosystem services, but its underlying processes and mechanisms remain poorly understood. Studies of islands and insular terrestrial habitats are essential for improving our understanding of habitat fragmentation. We argue that the Three-Gorges Dam, the largest that humans have ever created, presents a unique grand-scale...

The restorative potential of dam removal on ecosystem function depends on the reversibility of dam effects and its operations. While dam removal is an established engineering practice, the need for an understanding of the ecological response remains. We used paleoflood hydrology, hydrologic modeling, and aerial photo interpretation to investigate the long-term ecologic responses to dam failure ...

DNA adenine methyltransferase (Dam) plays an important role in physiological processes of Gram-negative bacteria such as mismatch repair and replication. In addition, Dam regulates the expression of virulence genes in various species. The authors cloned the dam gene of Yersinia enterocolitica and showed that Dam is essential for viability. Dam overproduction in Y. enterocolitica resulted in an ...

In the absence of a transboundary water agreement between riparian states Harirud River Basin, downstream states—Iran and Turkmenistan—have adopted resource-capturing policy through construction Doosti Dam in lower Basin when upstream state—Afghanistan—was engaged social unrest during 1980s to early 2000s. While has high potential supplying for major cities Turkmenistan Iran, its flow declined ...

in this study, application ofweap model (soil moisture method) have been investigated for simulating hydrological behavior in ahar-chai basin. according to the development of pressurized irrigation systems in this basin, since 2005, two models were carried out for two periods, pre-pressurized period (1998-2006) and pressurized period (2006-2013). irrigation method in first model was surface irr...

This paper firstly described the dam break in the aspects of theories and models. Break parameters prediction, the understanding of dam break mechanics, peak outflow prediction were shown as the essential for the dam break analysis, and eventually determined the loss of the damages. Secondly, as an application example, Foster Joseph Sayers Dam break was further modeled and analyzed using USACE ...

BACKGROUND Decision-analytic modelling (DAM) has become a widespread method in health technology assessments (HTA), but the extent to which modelling is used differs among international HTA institutions. In Germany, the use of DAM is optional within HTAs of the German Institute of Medical Documentation and Information (DIMDI). Our study examines the use of DAM in DIMDI HTA reports and its effec...

DNA adenine methylase (Dam(-)) mutants of Salmonella enterica are attenuated in the mouse model and present multiple virulence-related defects. Impaired interaction of Salmonella Dam(-) mutants with the intestinal epithelium has been tentatively correlated with reduced secretion of pathogenicity island 1 (SPI-1) effectors. In this study, we show that S. enterica Dam(-) mutants contain lowered l...

For the 8.2 hectares of Tupolang hydroscheme near dam, measures for its landscaping with help a drip irrigation system have been developed. The source is infiltration water from old riverbed. After natural filtration, clear, without mechanical impurities, salinity 0.2 g/l and flow rate about 50 l/s. At end this pipe, head 4 MPa, which eliminates traditional device pumping station to create requ...

The Ruzizi River, the outlet of Lake Kivu in Albertine Rift, flows into Tanganyika and is important for hydropower generation irrigation. impacts 2 dams River on macroinvertebrate community composition diversity were surveyed every 3 months from December 2015 to October 2017. Macroinvertebrate samples collected at sites upstream downstream additionally two further dams, both comparatively prist...