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The Kappa number estimates the amount of chemicals required during bleaching of wood pulp to obtain a pulp with a given degree of whiteness. Since the amount of bleach needed is related to the lignin content of the pulp, the Kappa number can be used to monitor the effectiveness of the lignin-extraction phase of the pulping process.
the Kappa number, indicating lignin content in pulp; represents: the Von Kármán constant, describing the velocity profile of turbulent flow; the kappa curve, a two-dimensional algebraic curve [39] the condition number of a matrix in numerical analysis; the connectivity of a graph in graph theory [40] curvature [41]
For most people, recommendations are to reduce blood pressure to less than or equal to somewhere between 140/90 mmHg and 160/100 mmHg. [2] In general, for people with elevated blood pressure, attempting to achieve lower levels of blood pressure than the recommended 140/90 mmHg will create more harm than benefits, [3] in particular for older people. [4]
In 1620, Johann Jakob Wepfer, by studying the brain of a pig, developed the theory that stroke was caused by an interruption of the flow of blood to the brain. [6] [page needed] After that, the focus became how to treat patients with stroke. [citation needed] For most of the last century, people were discouraged from being active after a stroke.
Antihypertensive therapy seeks to prevent the complications of high blood pressure, such as stroke, heart failure, kidney failure and myocardial infarction. Evidence suggests that a reduction of blood pressure by 5 mmHg can decrease the risk of stroke by 34% and of ischaemic heart disease by 21%.
The dry matter content of lignins is the residue after drying at specified conditions. Any matter that is volatile at the drying conditions is not included in the dry matter content. The moisture content can be approximated by 100% minus the dry matter content. To determine the dry matter content, The sample is dried at a temperature of 105±2 °C.
The blood volume determines the mean pressure throughout the system, in particular in the venous side where most of the blood is held. The low-pressure baroreceptors have both circulatory and renal effects; they produce changes in hormone secretion, resulting in profound effects on the retention of salt and water ; they also influence intake of ...
Cerebral perfusion pressure, or CPP, is the net pressure gradient causing cerebral blood flow to the brain (brain perfusion).It must be maintained within narrow limits because too little pressure could cause brain tissue to become ischemic (having inadequate blood flow), and too much could raise intracranial pressure (ICP).