Pyromorphite (Pb5(PO4)3Cl), the most stable lead mineral under a wide range of geochemical conditions [1], can form in urban and industrially contaminated soils [2] [3] [4] [5]. It has been suggested that the low solubility of this mineral could reduce the bioavailability of lead, and several studies have advocated pyromorphite formation as a remediation technique for lead-contaminated land [3]...

This experiment was conducted to determine the effect of chopping corn residue prior to baling on the nutrient composition of cornstalk bales. One dryland corn field planted with a single variety of corn was used. After harvest, one half of the field was chopped with a stalk chopper. The remaining half was not chopped. Each half of the field was then raked into windrows, baled, and wrapped with...

The total ribonucleic acid fraction of mature ovarian eggs of amphibia and fish is composed of two gross fractions, one soluble in cold 0.5 M perchloric acid and the other insoluble in the acid (1, 2). Furthermore, on prolonged treatment with mild alkali, about 80% of the acid is converted to mononucleotides, some 20% being recovered as oligonucleotide fragments, a few of which contain labile p...

The leaves of Dendrophthoe falcata growing on different trees had differing dry solid content. With 1 exception, the parasite leaf contained less dry solid than host leaf.A characteristic feature of the loranthus parasite was the accumulation of phosphate in excess of that present in host leaves. Expressed as percent of the total phosphorus, the parasite tissue contained significantly less acid...

This study has been taken up from two viewpoints. First, a study of field and pot experiments, with a view of determining, if possible, the indirect action of various salts when used as fertilizers; to ascertain if the increase in yield obtained from the use of a fertilizer is not due in part to the solvent action which it exerts on the comparatively insoluble phosphorus in the soil. Second, to...

In 1944 Taurog, Entenman, and Chaikoff (13) reported that the ratio of choline to phosphorus in the acetone-insoluble lipides of human and dog plasma was close enough to 1.0 to justify the conclusion that cephalin was almost, if not entirely, absent. Although instances of the absence of cephalin from plasma had been reported before (1, 8, 14), most of the earlier work (cited in (13)) had indica...

Phosphorus (P) is one of the essential macronutrients for plant growth and reproduction. Plants acquire P from the soil solution as phosphate anions. However, phosphate anions are extremely reactive and may be immobilized through precipitation with cations such as Ca2+, Mg2+, Fe3+ and Al3+, depending on the particular properties of the soil and as a result, the phosphate is highly insoluble and...

Submandibular saliva collected from cystic fibrosis patients and control subjects was separated by centrifugation into an insoluble deposit and a clear supernatant. The resulting calcium and phosphorus analyses performed on both fractions warranted a closer investigation as a consistent Ca/P molar ratio of 1.5 was found in the deposit of the cystic fibrosis patients, while no consistent ratio >...

abstract many agricultural researches have been performed to improve soil productivity. nitrogen (n) and phosphorus (p) are essential elements which are utilized by the plants in large amounts. phosphorus can be provided by applying chemical fertilizers. microorganisms convert insoluble phosphate to the soluble form and some bacteria such as rhizobacteria play an important role in this process....

The autolytic enzyme (endo-beta-1,4-N-acetylmuramoylhydrolase) of Streptococcus faecium (S. faecalis ATCC 9790) was released in a soluble form from insoluble cell wall-autolytic enzyme complexes by treatment with dilute NaOH at 0 degree C. Treatment of cell wall-enzyme complexes, obtained from either exponential- or stationary-phase cells, with 0.008 to 0.01 N NaOH gave maximum yields of autoly...