The IR and UV absorption spectra of the ammonium salt of cupferrone and manganese, cobalt, nickel, copper and zinc divalent cupferrate complexes are investigated. The IR absorption bands identified in the region 400-4000 cm '1 are given and assigned, especially those three related to M -0 vibrations. In the UV absorption spectrum of the cupferrone m etal complexes a characteristic shift in the ...

Hydroxyl free zinc oxide nanorods have been synthesized by a catalyst free surfactant based one-step solid state reaction process. The powder X-ray diffraction studies reveal well defined wurtzite peaks due to crystalline ZnO, while optical absorption spectra represent prominent exciton absorption and remarkable blueshift in the onset of absorption. As predicted by transmission electron microsc...

Abstract Background: Convulsion in neonatal period is a considerable clinical issue because of its potential brain damage.One of the benign neonatal seizures known as the  fifth day fits ,is due to zinc deficiency. Zinc is a rare element which has spread throughout the body fluids and tissues especially central nervous system. Reduction of neurons’ stimulation has been ascribed as the main eff...

introduction: zinc is an essential rare element that plays an important role in synaptic plasticity and modulation of the activity of central nervous system and is involved in learning and memory. increasing zinc intake may protect against conditions associated with zinc deficiency, such as diabetes. some studies have revealed that zinc deficiency in diabetic subjects is due to hogher excretion...

zinc is one of the elements necessary for growth and health in human. some evidences indicate that the zinc deficiency is one of real difficulties for the public health in developed and developing countries. since the pregnant women are more at risk by the zinc deficiency, and this can cause many problems, in this study we tried to find out the rate of zinc deficiency in pregnant women within t...

1. The absorption of zinc by the duodenum of the rat was greatly enhanced at late stages of pregnancy and during lactation. 2. During pregnancy no increase in lysine uptake could be demonstrated, but during lactation, when further increases in Zn absorption occurred, uptake of lysine was increased. 3. The increased absorption of Zn at different stages of pregnancy and lactation appeared to be r...

Zinc plays critical roles during embryogenesis, fetal growth, and milk secretion, which increase the zinc need for pregnancy and lactation. Increased needs can be met by increasing the dietary zinc intake, along with making homeostatic adjustments in zinc utilization. Potential homeostatic adjustments include changes in circulating zinc, increased zinc absorption, decreased zinc losses, and cha...

lead, copper, cobalt, nickel, iron and zinc ions form monocitrate complexes (negative charge) in citrate solution which is absorbed on the citrate form of anion-exchange resins (citrate as counter ion) y exchange of citrate ion with citrate complexes. these are subsequently recovered from the resin by 0.5m ammonium citrate eluent at ph 2.0. under optimized conditions, quantitative recovery was ...

The ingestion of iron-containing products is a potential toxicological emergency. It is a leading cause of pediatric unintentional ingestion fatalities because some iron-containing compounds are readily available (vitamin mixtures, iron pills). Among adults, it has been described as accidental overdoses (mainly in pregnancy) and as suicidal attempts. We report a 42 years old woman, admitted due...