منابع مشابه
pH DETERMINATION IN PLANT TISSUE.
In a recent investigation1 a procedure was found that permitted fairly accurate determinations of the pH of soils of low moisture percentages. One of the essentials of the method was the use of a horn spoon in spreading the moisture or soil films uniformly throughout the rather dry soil mass. When plant tissue is finely cut in a grinder, relatively few of the cells are actually opened. The impo...
متن کاملDerivative spectrophotometric determination of nitrate in plant tissue.
A derivative spectrophotometric method was developed to determine NO3(-)-N in plant tissues. The method is based on measurement of the first-derivative spectrum of nitrosalicylic acid in basic solution. The nitrosalicylic acid was obtained by reaction of samples with salicylic acid in concentrated sulfuric acid and was used by Cataldo et al. in nonderivative spectrophotometry. The main strength...
متن کاملDETERMINATION OF pH
Показатель концентрации ионов водорода рН есть мера активности этих ионов в растворах. Зависимость громадного количества химических, биохимических, природных, технологических и многих других процессов от величины рН стимулирует развитие теории и техники измерения этого показателя. Рассмотрено современное состояние способов измерения рН. Трудно отыскать такую область науки, технологии и химии ра...
متن کاملInferred pH in Steam Plant Water Chemistry
Inferred pH means pH calculated from straight and cation conductivity. The calculation can be applied to condensate, feedwater, and boiler water. Although not widely used in the United States, inferred pH is popular in Europe. Some plant chemists find inferred pH useful because it eliminates the need to measure pH directly, which without proper equipment can be a difficult task. This paper disc...
متن کاملPlant Sex Determination
Sex determination is as important for the fitness of plants as it is for animals, but its mechanisms appear to vary much more among plants than among animals, and the expression of gender in plants differs in important respects from that in most animals. In this Minireview, I provide an overview of the broad variety of ways in which plants determine sex. I suggest that several important peculia...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1941
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.16.2.405