جستجوی مقالات مرتبط با کلیدواژه « “Iodine” » در نشریات گروه « محیط زیست »

Iodine is one of the most important essential micronutrients throughout life. Salt is the most important and inexpensive iodized foods in Iran. This study aims to investigate the concentration of iodine of salt in Gorgan and compare it with standards. This study was descriptive-analytical. The sampling was performed on 11 brands of iodized salt in Gorgan,s stores. The iodine content was measured by titration with three replications. The data were analyzed using SPSS software. In this study, the lowest average iodine concentration was observed in the K brand (15.05 µg/g). It did not meet the Ministry of Health standards (30-60 µg/g and 20-50µg/g). It met the WHO, UNICEF, ICCDD standards(15-55µg/g). Also, the brand of J (21.68 µg/g), F (24.62 µg/g), I (28.23 µg/g), and E (23.62 µg/g) did not meet the new standards of the Ministry of Health. The amount of iodine in the salt can be due to its quality in the production stage (e.g. purity) and the time interval from production to consumption. Therefore, continuous monitoring is very important in the chain of production and distribution timely.

Drought stress is a limiting factor for plant production. In order to minimize the adverse effects of stress, different modifying compounds have been used. In this study, the role of iodine in reducing the effect of drought stress on morphological characteristics of Carthamus tinctorius L. was investigated in laboratory conditions. The experiment was performed as a factorial experiment based on a completely randomized design with 3 replications. Four levels of drought stress (0, -0/4, -0/8, -1/2, -1/6 MPa ( and three levels of iodine (0, 40, 80 μΜ) were considered as first and second factors, respectively. Results showed that all studied traits significantly (p<0.01) affected by drought stress. With increasing drought stress, germination percentage, germination rate, seed vigor, shoot, and root length, as well as seedling weight, were significantly decreased but the use of iodine leads to improve the adverse effect of drought stress. Overall results indicate that iodine could be considered a possibly beneficial element to diminish the harmful effects of drought stress.

Iodine is an essential micronutrient for human health, hence iodine deficiency causes various damages such as thyroid disorders. Climate and geological settings are the causes of the incidence and prevalence of the mentioned disorder. A bibliographic survey showed that no studies have been undertaken so far in this area with regard to geological setting, so in this research we focused on geological reason(s) with investigation on soil and water. In response to reports on the high incidence of iodine disorders in Dehdasht area, 16 ground water samples were taken from agricultural wells, drinking water and springs in the area to analyze anions, cations and iodine. The results showed that iodine levels were high in some water samples. To study the effect of soil on iodine, 20 soil samples were taken from various formations and pH, iodine as well as organic matter were measured. iodine can exist in several species. In different environments, the mobility of iodine depends on the type of iodine.The results showed that due to the presence of calcareous formations, high pH and calcium can lead to low mobility of iodine Also the alkaline and reduction conditions, can cause high mobility and enrichment of iodine in groundwater.