نتایج جستجو برای: sediment in drains indicator 221 tonha
تعداد نتایج: 16992816 فیلتر نتایج به سال:
Accumulations of sediment beneath the Antarctic Ice Sheet contain a range of physical and chemical proxies with the potential to document changes in ice sheet history and to identify and characterize life in subglacial settings. Retrieving subglacial sediments and sediment cores presents several unique challenges to existing technologies. This paper briefly reviews the history of sediment sampl...
OBJECTIVE Drains and catheters are used for both prophylactic and therapeutic reasons in clinical practice. This study aimed to investigate the factors that affect safety of drains, catheters, nasogastric tube and central venous line in patients who underwent surgery. MATERIAL AND METHODS Two hundred and four consecutive patients who were operated at the general surgery clinics under general ...
Tile drained land with phosphorus (P)-rich topsoil is prone to P loss, which can impair surface water quality via eutrophication. We used by-products from steel and energy industries to mitigate P loss from tile drains. For each by-product, P sorption maximum (P(max)) and strength (k) were determined, while a fluvarium trial assessed P uptake with flow rate. Although two ash materials (fly ash ...
BACKGROUND Cervical drains have historically been used to avoid postoperative wound and respiratory complications such as excessive edema, hematoma, infection, re-intubation, delayed extubation, or respiratory distress. Recently, some surgeons have ceased using drains because they may prolong hospital stay, operative time, or patient discomfort. The objective of this retrospective case-control ...
Heavy metals and some organic substances which are drained into the aquatic environments and cannot be decomposed or eliminated will sink into sediments or find their way into different levels of food chain. Bioaccumulation is the process of continuous deposition and aggregation of these substances into the body tissue of living organisms. Mollusks are remarkably appropriate to be used as bio-i...
This research was carried out to study the impacts of geomorphologic characteristics of claypan on land use and land degradation. Databank of the study area was constructed and digital terrain model of claypan was prepared. By using GIS techniques spatial distributions of the subsurface drainage network, sediment transportation index and wetness index were calculated. The results indicate tha...
the soil bioengineering is an applied science that it is the composition of structural, biological and environment concepts for soil erosion, sediment and flood control. biotechnical engineering techniques rely on biological knowledge to build geotechnical and hydraulic structures and to secure unstable slopes and banks. the largest enhancement in development of new soil bioengineering methods ...
This research studied an association between dental caries prevalence in the primary dentition and cribra orbitale, an indicator of nutritional stress in archeological populations. Skeletal remains of 221 British children (Pre-Roman to Late Medieval) were examined, of whom 100 had orbital material available. Dental caries, as dmfs, was related to the presence of cribra orbitale (none, slight, m...
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