A Cameca IMS 300 ion analyzer has been used to measure fluorine concentrations in tooth material. Samples of human and shark teeth were studied. Negative oxygen primary ions produce secondary mass spectra in which positive as well as negative fluorine ion peaks are well re­ presented. With constant measuring conditions, the reproducibility of the F/Ca ion ratios is satis­ factory. Fluorine conc...

Core rocks recovered from the main hole (5158 m deep) of the Chinese Continental Scientific Drilling (CCSD-MH) project, southern Sulu UHP terrane, east-central China, consist of eclogites, various gneisses and minor metaperidotite cumulates; this lithological section underwent subduction-zone UHP metamorphism. Coesite-bearing eclogites are mainly present between the depths of 100–2000 m, but be...

The purpose of the study was to investigate the cultural specificity of guanxi, wasta, and jeitinho, each of which has been identified as an indigenous process of informal influence. Students in Brazil, China, Lebanon, and the United Kingdom were presented with three scenarios derived from each of the nations sampled. They rated the extent to which each scenario was representative of the locall...

The efficacy of phosphine has been established for numerous major stored product insects. However, data related to the evaluation effect on Tenebrio molitor L and Alphitobius diaperinus Panzer are limited. present study aims evaluate susceptibility these species by using following protocols: (a) all life stages were exposed 3 days different concentrations phosphine, (b) adults 3000 ppm until in...

Salinity is one of the most abiotic stress destructive factors which limit growth and production of date palm offshoots considerably. In order to investigate the effects of antioxidant compounds on growth parameters as indicters to salt tolerance at the date palm offshoots cultivars of Kabkab (female) and Ghannami ahmer (male). Experiment was conducted with seven treatments and four replication...

Iron is a vital element in life. Because of the insolubility of iron oxides and sulfides the implication is that dissolved iron was fairly abundant and that oxygen and sulfide were rare in the atmosphere and ocean. Iron and its compounds present as pollutants in the atmosphere can cause deleterious effects to humans, animals, and materials. Analyses of urban air samples show that the iron conte...

background : within the framework to control mosquitoes, ovicidal, larvicidal and pupicidal activity of annona senegalensis leaf extract and its 4 fractions against anopheles gambiae and culex quinquefasciatus were evaluated in the laboratory conditions. methods : ovicidal test was performed by submitting at least 100 eggs of mosquitoes to 125, 250, 500, 1000 and 2000 ppm concentrations, while ...

Man has known that iron plays an important role in health and disease for considerable time (Loosli, 1978). Bryan (1931) stated that documented therapeutic use of iron date back as far as 1500BC. Iron was recognised as vital nutrient for animal (Boussingault, 1872). Braasch (1981) was the first to describe anaemia in nursing pigs that were being reared in confinement in Germany. However, he did...