Showing 4 results for Esmaili Sari
Volume 1, Issue 1 (3-2013)
Abstract
Otters at the top of the food chain and feeding largely on fish are likely to be especially vulnerable to the effects of bioaccumulating pollutants. This research reports the first data on mercury levels found in hairs of river otters (Lutra lutra) from Iran. Between June and December 2007, we collected museum and recent collections of river otter hair. These samples were collected from several provinces of three major regions of Iran. The mean of mercury concentration for all samples (recent and museum) was 5.819±1.557 mg/kg with 95% confidence interval for the mean. The concentrations of Total Hg (THg) in hair ranged from 0.293 to 12.382 mg/kg. No significant variation among the sample regions existed. A comparison of THg concentrations between two decades (1986-1996 and 1996-2006) showed that these differences were significant (p
Volume 2, Issue 3 (9-2014)
Abstract
The objectives for this study were first to understand and estimate energy consumption in each stage of production and processing of milk using regional data and second, suggesting improvement opportunities. A cradle to gate assessment of market milk was performed by separating the system into three stages: agronomy, animal farm and processing plant. Data were collected from multiple sources e.g. questionnaire, published papers, national and international databases, and the processing plant database. Throughout the study, ISO framework and International Dairy Federation guideline on life cycle assessment were used. The functional unit (FU) was one liter of pasteurized milk packaged in plastic pouch at the processing plant gate. The average energy demand for producing 1 kg of fat-protein corrected milk at farm-gate was 10.8 MJ, although for the final packaged milk, it was 12.5MJ. Main stages in overall energy use of FU were agronomy 68 %, animal farm 19 % and processing plant 13%. The average energy use for raw milk production was 2-5 times higher than previous European reports. To enhance efficiency in this sector, we need to assess other regions’ potentials for feed and milk production and then to focus on agronomy stage for lower energy use by optimization of irrigation, or even importing energy intensive feed such as barley and alfalfa from other countries.
Soheila Reza I Tabar, Abbas Esmaili Sari, Nader Bahrami Far,
Volume 13, Issue 53 (5-2015)
Abstract
This study was carried out in order to measuring Hg in some varieties of the most consumed imported and most locally cultured rice and comparing together and assess potential health risk. The correlation between Hg content of soil and rice samples, and effect of cooking and washing treatment on Hg concentration in rice, were investigated. In November 2008, locally most cultured rice and soil samples were collected from the Mazandaran province. High consumption of imported Indian rice with commercial brands collected from source, according to purposed method of standard office of Hormozgan. Advanced mercury analyzer Leco AMA 254 used to determination of Hg levels. The results showed that Hg concentration in Iranian rice (0.044 ± 0.003 µg g-1 d.w) significantly over imported rice (0.039 ± 0.001 µg g-1 d.w). Comparing the tolerable daily intakes (TDI) given by FAO/WHO with the mean estimated daily intakes (EDI) through rice consumption in this study was lower than TDI. In addition, results showed that no relationship was found between Hg concentration in rice and soil samples (r= 0.079, p=0.567), and cooking and washing treatment has not significant effect on mercury concentration. Finally, relationship between Hg concentration in soil and rice samples with soil parameters were studied that was not observed any correlation.
Volume 14, Issue 3 (5-2012)
Abstract
In this study, residues of imidacloprid (Confidor) were measured in greenhouse cucumbers in Mazandaran Province, Iran. Confidor 200 SL was applied at the recommended rate (30.0 g ai ha-1) and its double (60.0 g ai ha-1). Samples were collected at 1 h to 21 days after application and analyzed to determine the content and dissipation rate of Imidacloprid. . Analysis was carried out by the QuEChERS method using HPLC-UV. The average initial deposits of imidacloprid on the cucumber fruits were found to be 1.93 and 3.65 mg kg-1 at the single and double dosages, respectively. Results showed that Imidacloprid was rapidly dissipated in cucumbers following a first order reaction kinetics at both application rates. The amount of dissipation in 21 days was 94.48% and 99.18% for, respectively, the single and double dosages. Residues of imidacloprid dissipated below the maximum residue limit (MRL) of 1 mg kg_1 in 3 days. Half-life (T1/2) for degradation of imidacloprid in cucumber was observed to be 3.40 and 2.70 days at the single and double dosages, respectively. A waiting period of 3 days is suggested for safe consumption of cucumber. Also, results showed that the dissipation was dependent on the initial application dose and followed a first order rate kinetics.
