Evaluation of environmental stress by comet assay on freshwater snail Lymnea luteola L. exposed to titanium dioxide nanoparticles

The use of aquatic organisms to monitor for contamination is well-established. Therefore, this study was designed to assess the adverse effects of titanium dioxide nanoparticles (TiO2NP) in freshwater snail Lymnea luteola L. (L. luteola). For TiO2NPs ecotoxicity tests, snails were exposed for seven days. A dose and timeresponse relationship was observed for TiO2NP-induced genotoxicity. Induction of oxidative stress in digestive gland was observed by a decrease in glutathione and gluthathions-S-transferase levels accompanied by elevated malondialdehyde levels at TiO2NP (9 and 28 mg/mL).

Ecotoxicity of Single-Wall Carbon Nanotubes to Freshwater Snail Lymnaea luteola L.: Impacts on Oxidative Stress and Genotoxicity

Mammalian studies have raised concerns about the toxicity of carbon nanotubes, but there is very limited data on ecogenotoxicity to aquatic organisms. The aim of this study was to determine ecogenotoxic effects of single walled carbon nanotubes (SWCNTs) in fresh water snail, Lymnea luteola (L. luteola). A static test system was used to expose L. luteola to a freshwater control, 0.05, 0.15, 0.30, 0.46 mg/L SWCNTs for up to 4 days. SWCNTs changed a significant reduction in glutathione, glutathione- S-transferase, and glutathione peroxidase with in hepatopancreas of L. luteola.

I n vivo DNA damaging and apoptotic potential of silver nanoparticles in Swiss albino mice

Nanoparticles can potentially cause adverse effects on organs, tissue, cell levels, and protein levels because of their physicochemical properties. Silver nanoparticles (AgNPs) are being used on a wide scale in world consumer markets; their potential hazards for humans remain largely unknown. This study aimed to investigate the intraperitoneal toxicity of AgNPs (26 mg per kg of body weight, 52 mg per kg of body weight, and 78 mg per kg of body weight) over 72 hours in Swiss albino mice.

Potential histopathological and molecular changes in rat vas deferens inhaled by Boswellia papyrifera and Boswellia carterii

Boswellia papyrifera and Boswellia carterii released from smoke contaminate indoor environment and consequently adversely affect humans as evidenced by respiratory disturbances. The aim of this study was to determine the effects of these plants on pathological and biochemical changes in vas deferens of albino rats. Animals were administered 4 g/kg body weight B. papyrifera and B. carterii daily for 120 days along with controls. Significant changes were observed in epithelial cell types and some cells showed signs of degeneration.

Math 481

MATH 481 : Real Analysis II (E) 4 (3+1+0) credit hours

Riemann Integrations: the definition, Darboux theorem, Riemann sums, the fundamental theorem. Sequences and series of functions: uniform convergence for the sequences and series of functions, power series. Lebesgue measure: Borel algebra, outer measure, Lebesgue measurable sets, Properties of Lebesgue measure. Lebesgue integral: simple functions, measurable functions, definition of Lebesgue integral, Monotone convergence theorem, bounded convergence theorem, the relation between Lebesgue and Riemann integrals.

ملحقات المادة الدراسية
Excersises

دراسة كيمياء المنتجات الطبيعية

The objective of the course is to give the studens basic knowledge within natural product chemistry, including the distribution of selected secondary metabolites, their biosynthesis and bioactivity.

ملحقات المادة الدراسية
الإختبارات
المحاضرات

الصفحات

اشترك ب KSU Faculty آر.إس.إس