An attempt has been made to partially characterize the substance responsible for the rhythmic incorporation of 35S (inorganic sulfate) in the course of the cell cycle in early Limnaea embryos. This trichloroacetic acid (TCA) insoluble substance is partly pronase sensitive, and dissociable into two fractions after treatment with NaCl. One of these remains TCA-insoluble while the other is TCA sol...

Phosphorus (P) is a major nutrient for plant growth and animal health, its availability in soil influenced by agronomic management properties. This study examined the distribution of labile non-labile P fractions grassland properties that influence their temperate grasslands. Eleven were identified as, (H2O.P NaHCO3.P), moderately (NaOH.P) non-available (NaOH.P, HCl.P residual P). The P, organi...

The efficacy of synthetic inorganic insecticides to control malaria vector mosquitoes is compromised by increased mosquito resistance to insecticides. Furthermore, use of inorganic insecticides raises serious environmental toxicity concerns. The test plants, Oreosyce africana and Piper capense were identified in Ethiopia through ethnobotanical leads obtained on the basis formal and informal fie...

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In acid soils, soluble inorganic phosphorus is fixed by aluminium and iron. To overcome this problem, acid soils are limed to fix aluminium and iron but this practice is not economical. The practice is also not environmentally friendly. This study was conducted to improve phosphorus availability using organic amendments (biochar and compost produced from chicken litter and pineapple leaves, res...

The extracted shale oil by the thermal cracking process of the El-Lujjan oil shale showed that the yield of oil was around 12 wt%. The amount of sulfur in this shale oil was found to increase (from 7 to 9.5 wt%) with the increase of the boiling point for different distillate fractions. Sulfur in Jordanian oil shale was found to be mainly organic sulfur with negligible amounts of inorganic sulfu...

Phosphorus (P) plays an important role in the physiological plant processes; however, tropical soils, P is one of most limiting nutrients for crop yield due to its low mobility, determined by adsorption this element soil. To enhance P-use and P-acquisition efficiency, research aimed evaluate effect cover crops mycorrhizal colonization on changing soil fractions, both organic inorganic. A comple...

Protected deoxyribonucleotides were identified by field desorption mass spectrometry in eluate fractions from high performance liquid chromatography. The production of abundant cationized molecules and the formation of structural significant fragments by thermally/field induced processes allowed a direct and unambiguous identification of the synthesized products. In addition, indications can be...

The types of sulphated macromolecules produced by the exocrine pancrease were investigated. To determine whether this tissue utilized inorganic sulphate for protein production, the in-vitro behaviour of material labelled with 35S-sulphate was compared with material labelled with [3H]leucine (secretory proteins). While incubating tissue slices in the presence of cycloheximide resulted in an imme...

Isolated mitochondria will catalyze many of the oxidative reactions observed with intact cells. However, such enzymatic activity may be only an approximation of the in vivo metabolism. Metabolic studies of reconstituted cells have utilized washed residues which represent simultaneously isolated cellular components (l), the recombination of cellular components in vitro (2), and special media whi...