in this study the application of zno nanoparticles to uv photocatalytic degradation of nonionic surfactanttriton x-100 in aqueous media was investigated. the affecting factors on the photodegradation such as tritonx-100 initial concentration, nanocatalyst weight, ph, temperature and other parameters were studied anddescribed in details. the degradation rate was found to be strongly influenced b...

zinc has previously been reported to alleviate salinity stress in plants. in this study, we monitored various biomass and chlorophyll fluorescence parameters to determine the optimum zinc sulfate concentration that can be used as foliar spray to alleviate salinity stress in glycine soja. the plants subjected to a series of salinity levels (nacl concentration of 0, 100, 200, and 300 mmol l-1), a...

the lead and zinc sample from goosh-e-fill mine with 2.4%pb, 8.0%zn and 10.0% fe, was used in different flotation experiments to recover lead and zinc minerals. the valuable minerals in prepared sample were oxidized and the results showed that the lead minerals floated at ph= 9.5 and 11.5, probably it can be due to existence of two or more types of lead minerals. the best result was achieved fo...

BACKGROUND: Zinc (Zn) is one of the most important essential elements in the body of animals and plants. Zinc plays a significant role in the structure of more than 300 different proteins and in many life supporting biochemical and metabolic processes such as cellular respiration and protection against free radicals. Nanoparticles of zinc are the new form of Zinc used in cosmetic and personal c...

some reports indicate a wide range for zn requirements for broiler chickens i.e. from 10.6 to 105 mg kg-1. a number of factors other than dietary zn concentration determine the need for supplementation, principally dietary phytate. therefore, the objective of the present investigation was reevaluation of the zinc requirement for broiler, fed practical diet supplemented with phytase in a dose-re...

introduction: osteoporosis as a public health problem affects the quality of life of many postmenopausal women. a high concentration of zinc is found in bones. it works as a cofactor of some key enzymes essential in bone synthesis and reconstruction.having considered the importance of zinc and calcium for healthy bones and also the prevalence of zinc deficiency, this study was designed to deter...

zinc and iron nano-oxides (100 ppb) were promoted the hypericin and hyperforin production in hypericum perforatum cell suspension culture. high performance liquid chromatography method was used for detectection and identification of hypericin and hyperforin in h. perfuratum cell suspension cultures elicited with different concentrations of zinc and iron nano-oxide (0, 50, 100 and 150 ppb) after...

Zinc and iron nano-oxides (100 ppb) were promoted the hypericin and hyperforin production in Hypericum perforatum cell suspension culture. High performance liquid chromatography method was used for detectection and identification of hypericin and hyperforin in H. perfuratum cell suspension cultures elicited with different concentrations of zinc and iron nano-oxide (0, 50, 100 and 150 ppb) after...