Classical logistics systems supports only processes carried out in material flow from manufacturer to final user. Recently it has been a striking growth of interest in optimizing logistics processes that supports recapturing value from used goods. The process of planning, implementing, and controlling the efficient, cost effective flow of raw materials, in-process inventory, finished goods and ...

Functionalized nanocompartments (Synthosomes) are nanometer sized (50-1000 nm) hollow spheres consisting of a mechanically stable block copolymer membrane and an engineered transmembrane protein controlling compound fluxes in and out of the polymer vesicles. Progress in Synthosome research and potential applications of Synthosomes will be summarized in the following paragraphs. Achieved progres...

The motility mutant of Chlamydomonas reinhardtii pf14 lacks radial spoke structures in its flagellar axonemes, and 12 proteins present in wild type are missing from a two-dimensional map (isoelectrofocusing/sodium dodecyl sulfate electrophoresis) of its (35)S-labeled flagellar proteins. Six of these same proteins are missing in pf1, which lacks spoke-heads. To determine whether any of the missi...

Ores and concentrates often contain enrichments of scarce or critical elements such as Te, Bi and Sb, but there are few financial incentives or competitive technologies that allow their recovery. They may be lost to tailings or roasted off (becoming an environmental liability), or can incur smelter penalties. Even when recovered during smelting and refining, the value may not be returned to the...

Increased uncertainty is one of the characteristics of product recovery networks. In particular the strategic design of their logistic infrastructure has to take uncertain information into account. In this paper we present stochastic programming based approaches by which a deterministic location model for product recovery network design may be extended to explicitly account for the uncertaintie...

Technical Aid Centers (TACs) in Norway supply devices, such as wheelchairs and hearing aids, to people with handicaps. When a device is returned to a TAC, the TAC staff must decide whether to scrap it or to refurbish it so that it can be used again. The Norwegian National Insurance Administration (NNIA) found that decision makers were scrapping units too frequently, basing their decisions mainl...

Ores and concentrates often contain enrichments of scarce or critical elements such as Te, Bi and Sb, but there are few financial incentives or competitive technologies that allow their recovery. They may be lost to tailings or roasted off (becoming an environmental liability), or can incur smelter penalties. Even when recovered during smelting and refining, the value may not be returned to the...

We study inventory systems with product recovery. Recovered items are as-good-as-new and satisfy the same demands as new items. The demand rate and return fraction are deterministic. The relevant costs are those for ordering recovery lots, for ordering production lots, for holding recoverable items in stock, and for holding new/recovered items in stock. We derive simple formulae that determine ...

a rapid, sensitive and reproducible hplc method using amperometric detector was developed and validated for the analysis of clarithromycin in human plasma. the separation was achieved on a monolithic silica column (mz- c8 125×4.0 mm) using acetonitrile- methanol-potassium dihydrogen phosphate buffer (40:6:54,v/v), with ph of 7.5, as the mobile phase at a flow rate of 1.5 ml/min. the assay enabl...

In this paper, a new model is proposed for the integrated logistics network designing problem. In many research papers in this area, it is assumed that there is only one option for the capacity of each facility in the network. However, this is not a realistic assumption because generally there may be many possible options for the capacity of the facility that is being established. Usually the c...