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A tick mattress, bed tick or tick is a large bag made of strong, stiff, tightly-woven material [1] . This is then filled to make a mattress , with material such as straw, chaff , horsehair , coarse wool or down feathers , [ 2 ] : 674–5 vol1 and less commonly, leaves, grass, reeds, bracken, or seaweed. [ 3 ]
In geology, a graded bed is a bed characterized by a systematic change in grain or clast size from bottom to top of the bed. Most commonly this takes the form of normal grading, with coarser sediments at the base, which grade upward into progressively finer ones. Such a bed is also described as fining upward. [1]
Capillary refill time (CRT) is defined as the time taken for color to return to an external capillary bed after pressure is applied to cause blanching. [3] It can be measured by holding a hand higher than heart-level and pressing the soft pad of a finger or fingernail until it turns white, then taking note of the time needed for the color to ...
A streambed or stream bed is the bottom of a stream or river and is confined within a channel, or the banks of the waterway. [1] Usually, the bed does not contain terrestrial (land) vegetation and instead supports different types of aquatic vegetation ( aquatic plant ), depending on the type of streambed material and water velocity.
Stimulus control therapy is intended to limit behaviors intended to condition the body to sleep while in bed. [185] The main goal of stimulus control and sleep restriction therapy is to create an association between bed and sleep. Although sleep restriction therapy shows efficacy when applied as an element of cognitive-behavioral therapy, its ...
Moving bed biofilm reactors can efficiently treat hospital wastewater and remove pharmaceutical micropollutants. A 2023 study has shown that a strictly anaerobic MBBR, combined with an aerobic biofilm reactor can achieve high removal rates of pharmaceuticals, such as metronidazole , trimethoprim , sulfamethoxazole , and valsartan .
Valley fill sites can be characterized by high sulfur concentrations from the weathering process of mountaintop sulfur-rich debris. Additionally, acid mine drainage (AMD) increases the concentration of sulfate, iron, aluminum and manganese in surrounding streams. Some of the most common treatments include plugging mine openings, altering the ...
A dry lake bed, also known as a playa (/ ˈ p l aɪ-ə /), is a basin or depression that formerly contained a standing surface water body, which disappears when evaporation processes exceed recharge. If the floor of a dry lake is covered by deposits of alkaline compounds, it is known as an alkali flat.