نتایج جستجو برای: and chemical industries

تعداد نتایج: 16874081  

Journal: :Journal of the Society of Chemical Industry 1909

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1389

fluorescence chemical sensors for the highly sensitive and selective determination of pb2+ , hg2+, co2+ and fe3+ ions in aqueous solutions are described. the ion sensing system was prepared by incorporating lipophilic ligand (l) as a neutral ion-selective fluoroionophore in the plasticized pvc membrane containing sodium tetraphenylborate or potasium tetrakis (p-chlorophenyl) borate as a liphoph...

Journal: :Journal of Industrial & Engineering Chemistry 1918

Journal: :CoRR 2012
James McNerney Brian D. Fath Gerald Silverberg

We study the structure of inter-industry relationships using networks of money flows between industries in 20 national economies. We find these networks vary around a typical structure characterized by a Weibull link weight distribution, exponential industry size distribution, and a common community structure. The community structure is hierarchical, with the top level of the hierarchy comprisi...

Journal: :Technometrics 2002
Eric R. Ziegel

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