نتایج جستجو برای: grab sampling
تعداد نتایج: 213607 فیلتر نتایج به سال:
Macrobenthos are benthic animals that live in or on the bottom sediments which used as a bioindicators to assess the presence of contaminants, in natural aquatic systems. This study aimed to achieve the relationship between sediment composition and macrobenthic communities, distribution. Sampling was done monthly in 2011-12 by a powerboat, and VanVeen grab with 0.04 cross section, were used for...
Recently the world governing body of aquatic sport has approved the use of a new starting platform (Omega OSB11), and it is currently being used at all international events. Due to the recent approval, swimmers are modifying their start techniques to be able to maximize performance from the new platform. This study investigated the effectiveness of the grab and track competitive swimming start ...
We describe here the first working prototype of a novel display for viewing 3D medical images. The position and orientation of a freely movable touch-screen display are optically tracked and used to continuously determine which slice to display within a 3D data set. The slice is registered “in situ” relative to a fixed coordinate system, through which the display is moved. We have coined the te...
This study examined the relationships between the performances of a swimming grab start and each of countermovement jump for distance, countermovement jump for height, squat jump for distance, and squat jump for height. Nine elite and 7 recreational female swimmers performed 6 trials in each of the 4 jumping techniques and six 25-m freestyle sprints after a grab start. Elite participants perfor...
Sediment particle size is an important environmental parameter that influences benthic species composition and frequently used in habitat ecosystem classification systems. In South Africa, grabs are regularly to collect seafloor sediment samples for analysis. However, grab sample failures a common, time-consuming costly exercise, particularly deep-sea work. This study compares replicate collect...
Benthic organisms and substrates in the Great Salt Lake, Utah, were sampled during one week in June 2006 to test collection methodologies for biostromes and soft substrates and to get preliminary information on the selenium concentrations of benthic organisms. The sampling was focused on biostromes, as these solid reef-like structures cover 23% of the oxic benthic area of the lake and are the p...
Catalytically inactive pseudophosphatases are able to signal in the absence of enzymatic activity. Analyzing the oocyte-to-zygote transition in the worm, Cheng et al. (2009) and Parry et al. (2009) now show how two pseudophosphatases, EGG-4 and EGG-5, can regulate signaling by the DYRK family kinase MBK-2.
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