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Showing 3 results for Nitrate
The Evaluation of Serum Nitrite, Nitrate and Malonyldialdehyde Levels in Smokers
M Rostami, M Jarfi,
Volume 3, Issue 2 (10-2009)
Abstract
Abstract Background and objectives: Smokers are exposed to significant quantities of ROS (Reactive Oxygen Species) and The Level of Nitric Oxide (NO), the primary vasodilator produced by endothelial cells, is changed by cigarette smoking. Cigarette smoking is associated with impaired endothelium-dependent vasodilatation and cardiovascular disease (CVD). The aim of this study is to determine the level of serum nitrite, nitrate and malondialdehyde (MDA) levels in smokers. Material and Methods: In this descriptive analytical study, 60 healthy male smokers and 60 male non-smokers (control group) were selected by a Purposive sampling and then serum levels of nitrite, nitrate and MDA in all patients were determined and compared to together. Results: Serum nitrite and nitrate level in smokers are 10.4±3.1 and 19.6±5.9 and in non-smokers is 14.6±4.4 and 29.3±6.7 (p<0.00001) μmol/L, respectively. The results show that smokers’ are significantly lower than non-smokers’. Serum MDA level in smokers (11.7±2.6 μmol/L) is significantly higher (p<0.00001) than non-smokers (8.3±1.9 μmol/L). Conclusion: Based on the results, serum level of nitrite and nitrate are lower and MDA is higher in smokers. This difference can be related to CVD in smokers. Keywords: Smokers, Non-smokers, Nitrite, Nitrate, Malodialdehyde (MDA), cardiovascular disease (CVD).
Effect of Chitosan, Aluminum Oxide and Silver Nanoparticles on Antibacterial, Deodorizing and Moisture Absorption Properties of Nonwoven Polyester Fabrics for Use in Medical Textiles
Mohammad Khajeh Mehrizi , Hasan Mashroteh, Narges Nabizadeh Moghadam Noghabi,
Volume 10, Issue 4 (7-2016)
Abstract

ABSTRACT

         Background and Objective: Hospital clothing and textiles have a great role in providing medical services to patients. Hospital services would not be possible without using these textiles. The aim of this study was to prepare non-woven polyester for use in medical textiles.

         Methods: In this study, most important expected properties of hospital clothing were created on polyester fabrics via various stages of finishing using chemicals such as calcium chloride, sodium alginate, chitosan and nanoparticles of silver nitrate and aluminum oxide. Antibacterial (activity against Staphylococcus aureus), deodorizing and wicking properties of samples were evaluated using nano-biomaterials via standard tests.

          Results: The water absorption rate of nonwoven samples that were finished with chitosan significantly improved. The results also showed favorable level of antimicrobial activity caused by silver nitrate and chitosan. In addition, deodorizing activity was observed in all samples. However, silver nitrate-finished samples had higher deodorizing activity. The capillary action of all samples reduced after completion of all finishing procedures.

          Conclusion: The results show that the use of chitosan and alginate along with nanoparticles of silver nitrate and aluminum oxide can be effective in achieving the desired properties of medical textiles.

        Keywords: Medical textiles, antibacterial substances, chitosan, silver nitrate.


Effect of Different Concentrations of Lead Nitrate on Biochemical Parameters of Alfalfa
Reihaneh Sabbaghzadeh,
Volume 14, Issue 3 (5-2020)
Abstract
Background and objectives: Polyphenols can exert free radical scavenging effects by naturalizing dangerous reactive oxidants. Formation of reactive oxygen species can cause oxidative damage to human cells, leading to various diseases such as cancer, cardiovascular disease, osteoporosis and degenerative diseases. In this study, we investigated effect of treatment with various concentrations of lead (II) nitrate, a toxic and an oxidizing agent, on growth and biochemical parameters of alfalfa (Medicago sativa L.).
Methods: Total phenol content was estimated by the Folin-Ciocalteu method. The 1,1-diphenyl-2-picrylhydrazyl (DPPH) stable free radical was used for assessment of free radical-scavenging activity. Changes in the activity of catalase and peroxidase as well as in the level of proteins, phenol content and malondialdehyde (as marker of lipid peroxidation) were investigated following treatment with different concentrations (0, 8, 12 and 16 mg/l) of lead nitrate for 21 days. All experiments were done in triplicate. Butylated hydroxytoluene and quercetin were used as standard controls.
Results: Treatment with lead significantly altered the level of total phenolic content, proteins, malondialdehyde and the activity of catalase and peroxidase (P<0.05).
Conclusion: Our results indicate that lead-contaminated soil can significantly alter biochemical and growth parameters of alfalfa.

 
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