an important factor. It is well known that uptake of C02 from the tissue depends upon the following reactions: Thus, the uptake of CO2 from the tissues is dependent upon the supply of hydrogen acceptors so that the reaction can proceed towards the right. Hence, the pH of urine is provided by the excretion of H+ into the tubular fluid. To assist in maintaining the proper reaction, a system of buffering Several kinds of GUS reporter gene assay are available, depending on the substrate used. 90:179-188. A buffer is a mixture of an acid that does not ionize completely in water and its corresponding base-for example, carbonic acid (H 2 CO 3) and sodium bicarbonate (NaHCO 3 ). Buffer width may be positively related to nitrogen removal ef-fectiveness by inﬂuencing nitrogen retention through plant sequestration or removal through microbial denitriﬁcation. Plant buffer systems in relation to the absorption of bases by plants. The most important examples of biological buffer systems are as follows: The major buffer of extracellular fluid is the HCO3/ H2CO3) system. 6:103-125. For example, an ammonium buffer (NH4OH + NH4CI) is used to determine Ca and Mg ions in water (triionometric method). New Jersey Agr. DOI: 10.1104/pp.2.3.303 [CrossRef]. Jour. 79:233-264. DOI: 10.1007/BF01603030 [CrossRef],  Martin S. H. Hydrion concentration of plant tissues. DOI:10.3733/hilg.v07n05p207, Animal, Aquaculture and Veterinary Science, Cotton-potato farms: Costs, returns, and relationships to scale of operation in Kern County, Mechanized cotton growing: Effects of mechanization on yield and quality studied in tests on planting, thinning, flaming and harvesting, Cotton fertilizers: Kind and amount needed for best production studied in field tests, Spider mite on cotton: Under leaf coverage obtained with low volume, low pressure sprayers, Pest control by seed treatment: Wireworms and seed-corn maggots can be controlled by treating seed with lindane prior to planting, Grape leaf skeletonizer: Two parasites of the western skeletonizer colonized in successful search for natural enemies of pest, Thinning tokay grapes: Results of a study on the relationship of thinning practices to lugs shipped, total yield and net income, Landscaping for summer shade: Good planning uses cooling influence of plants to reduce summer temperatures in living areas, Cracked stem of celery: Boric acid sprays reduced incidence of disorder in field trials with nitrogen and potash fertilization, Pre-packaged and bulk spinach: Survey of Berkeley housewives reveals buying practices and opinions on price and quality of spinach at retail, Studies in pigeon nutrition: Addition of vitamin supplements to commercial pigeon ration investigated for effect on squab production, Sugar beet by-product tested: Alternate for molasses palatable to cows when mixed with concentrates and does not affect milk quality, © 2020 Regents of the University of California. This tends to return the HOC3−/H2CO3 ratio to its normal value of 20:1 and thus to restore pH toward 7.4.  Vickery H. B., Pucher G. W. A source of error in the determination of amide nitrogen in plant extracts. 1. tissues be kept in a healthy condition. sap obtained from plants grown in definitely controlled nutrient solutions. The Henderson Hasselbalch equation is important, for it enables us to appreciate that the blood pH is dependent on the ratio of the concentration of free acid to the concentration of the buffer anion (bicarbonate).  Martin S. H. Hydrion concentration of plant tissues. The buffer system of plasma can withstand the addition of 16 meq of acid or 29 meq of alkali per litre and still maintain the pH within the range compatible with life. 15:181-204. Many factors influence the determina-tion of a buffer width that is effective, including the targeted function of the buffer (e.g., to reduce erosion or protect raptor nesting habitat) and landscape characteristics, like slope, geology and vegetation. The buffers of bean stem and root. A Biological Buffer solution maintains the optimum pH ranges in living systems; changes in blood pH could disrupt biochemical With a high plasma pH, the respiratory rate falls, alveolar pCO2 and hence plasma [H2CO3] rise, and the pH moves toward 7.4. 1931. Plant Physiol. New Jersey Agr. BLOCK CAPITALS. Buffering is important in living systems as a means of maintaining a fairly constant internal environment, also known as homeostasis. in the vacuolar sap with respect to hydrogen ion is presumably necessary. The special feature of the investigation was the use of plants grown under controlled conditions of solution or sand-culture technique. Abstract does not appear. Inherent factors related to absorption of mineral elements by plants. Exp. First page follows. In cellular physiology, buffers are an important way for the cell to maintain constant or smoothly changing conditions.
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