Iodine species in the troposphere are linked to ozone depletion and new particle formation. In this study, a full year of iodine monoxide (IO) columns retrieved from measurements of the SCIAMACHY satellite instrument is presented, coupled with a discussion of their uncertainties and the detection limits. The largest amounts of IO are found near springtime in the Antarctic. A seasonal variation ...

This paper provides a preliminary analysis of the supercritical Brayton cycle, a power generation system for space exploration. Supercritical working fluids increase efficiency due to increased compressibility at the critical point but have not been investigated at the high temperatures necessary for space power generation. Through computer simulation, the viability of the supercritical Brayton...

background: to assess accessibility of iodinated salt and urinary iodine concentrations (uic) during pregnancy. this cross-sectional study was carried out between october and december, 2009 in urmia county, west azerbaijan (wa), iran. methods: data on demographic characteristics and iodinated salt accessibility were gathered through a questionnaire at 1st trimester. household salt samples and u...

Iodine-129, the long-lived radioisotope of iodine, occurs naturally, but anthropogenic generated 129 I has dominated the environment in the past 60 years. Due to active chemical and environmental properties of iodine and the enhanced analytical capacity for 129 I measurement, the application of 129 I as an environmental tracer has highly increased in the past 10 years. Neutron activation analys...

iodine is an essential trace element in the human diet. the following work presents the latest information concerned with iodine determination in raw milk, in iran. iodine content of milk was determined by sandell-kolthoff method where the samples were taken from holstein dairy cows, in shahrkord, the central part of iran. thirty six samples were taken from transportation tanks in semi industri...

␮g/L). We also analyzed an aliquot of each of the three samples for 13 consecutive days (a total of 39 samples); 38 of the 39 (97.5%) were placed correctly, and the 39th was placed in the category immediately above the correct category. We diluted a urine sample containing 6.3 ␮mol/L mmol/L added to a sample containing 1.15 ␮mol/L (146 ␮g/L) iodine did not change the iodine concentration measur...

background: the aim of the study was to evaluate the third trimester urinary iodine excretion and to assess its relation with newborns thyroid function. materials and methods: a total  of  208 healthy third trimester pregnant women without previous history of thyroid disease were included in the study. urinary iodine levels of mothers were measured and neonatal tsh levels were screened on the 3...