Zinc coatings, A comparative analysis of process and performance characteristics, American Galvanizers Association , 2011, https://www.galvanizeit.org/uploads/publications/Zinc_Coatings.pdf (last visited 4 October 2017
Authors:J. Marešová, L. Remenárová, M. Horník, M. Pipíška, J. Augustín, and J. Lesný
The aim of this paper was to obtain quantitative data of foliar uptake kinetics and long distance transport of zinc in tobacco
(Nicotiana tabacum L.) and hop (Humulus lupulus L.) plants. Zinc was used as a model of microelement and toxic metal, tobacco and hop as a representatives of agriculturally
important plants. A tip of leaf blade was immersed in the solution spiked with 65ZnCl2 and foliar uptake and translocation to other parts of the plant grown in nutrient solution was measured by gamma-spectrometry
and autoradiography. We found that foliar zinc uptake by both plants is dependent on the initial metal concentration within
the range C0 = 10–100 μmol dm−3 ZnCl2. Zinc is immobilized mainly in immersed part of the contact leaf and only <1% is transported to non-immersed parts of the
leaf. At C0 = 0.1 mmol dm−3 ZnCl2 concentrations >2.5 mg/g Zn and 4.8 mg/g Zn (dry wt.) in immersed part of tobacco and hop leaf plant, respectively were found
after 5 days of exposure. Low mobility of zinc entering the plant via the leaf surface can be attributed to the immobilization
of zinc into Zn–ligand complexes with high stability constants log K at pH 6.0–8.0, such as the reaction products of Zn2+ ions with citric acid, histidine or phosphates. Zinc can be extracted from dried leaves by the solutions of inorganic salts,
carboxylic acids, amino acids and synthetic complexing ligands such as EDTA. Anionic (SDS) and non-ionic (Tween 40) surfactants
causes the decrease of the Zn foliar uptake, but not translocation of Zn from the contact leaf area. Obtained data are discussed
from the point of view of possible limited efficiency of liquid formulations designed for practical applications as Zn foliar
Authors:M. R. Latha, P. Savithri, R. Indirani, and S. Kamaraj
photosynthetic enzymes and zinc deficiencies on Oryza sativa and Pennisetum americanum. Soil Fertil. , 48, 108-149.
Photosynthetic activities of C3 and C4 photosynthetic enzymes and zinc deficiencies on Oryza sativa and Pennisetum
To understand the role of Cu and Zn in human blood both in controls as well as in cardiovascular (CVD) patients, whole blood
samples of 181 CVD and 185 controls between the ages of 20–66 years were investigated. Instrumental neutron activation analysis
(INAA) and flame atomic absorption spectrophotometric techniques were successfully employed to quantification Cu and Zn levels.
The mean blood-Cu levels (1.50 mg L−1) were found as enhanced whereas Zn levels (5.88 mg L −1) were reduced in cardiovascular patients group as compared to 0.90 and 6.70 mg L−1 for Cu and Zn respectively in controls. Cu/Zn ratios for CVD patients are also higher than in control subjects. Negative
correlation exists between Cu and Zn levels in both controls and patient groups. However, when the CVD patients were checked
for their systolic and diastolic pressure it was found that copper concentrations in these patients was significantly increased
(p < 0.001) with the rise of blood systolic pressure so a positive correlation was observed between copper and systolic pressure.
Zn on the other hand has an inverse relation with systolic as well as diastolic pressure (p < 0.001). Total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol, and
triglyceride (TG) in blood samples have also been determined and their probable role in the CVD complication has been observed.
A positive correlation of blood-Cu with TC, TG, and LDL-C indicates that rise in blood-Cu levels may initiate the development
of CVD. An increase in Cu/Zn ratio can instigate the cardiovascular risk factor. The findings from this study can definitely
update our knowledge of the role of Cu and Zn in the development of CVD risk in humans.
Authors:T. Kośla, M. Skibniewski, E. Skibniewska, and G. Urbańska-Słomka
. Diss. Dr.habil., Fac. Med. Vet., Univ. Leipzig.
Koşala, T. (1992): The contens of macro- and microelements in the fodder, blood serum and hair of European bison. Part II. Iron, copper and zinc. Ann. Warsaw
Authors:Sevdiye Atakul Savrık, Devrim Balköse, and Semra Ülkü
The interest in the production of zinc borate has steadily grown because of the great expectations for the applications including polymer additive as flame retardants, the preservative in wood composites and