نتایج جستجو برای: international migration

تعداد نتایج: 445197  

Journal: :پژوهش های علوم و صنایع غذایی ایران 0
pages 1-10 k. abrari p. zandi m. ghadiri m.t mazlumi

in iran, the majority of vegetable oil producers , use pet for packaging their products . due to high solubility of pet oligomers in the oils , and shelf life of liquid oils , it is expected that some compounds migrate into the oil . this study was carried out to determine the amount of migration of terephtalates from pet bottles into sunflower oil and the effect of temperature and storage time...

Journal: :Demographic research 2016
Mao-Mei Liu Mathew J Creighton Fernando Riosmena Pau Baizán Mun Oz

BACKGROUND Longitudinal micro-level data about international migration behavior are notoriously difficult to collect, but data collection efforts have become more frequent in recent years. Comparative research of the patterns and processes of international migration, however, remains quite rare, especially that which compares across regions. OBJECTIVE We highlight the promises and difficultie...

Journal: :Journal of Population Economics 2000

Journal: :Population and Development Review 2020

Journal: :Center for Migration Studies special issues 2008

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