منابع مشابه
Phthalates and heavy metals as endocrine disruptors in food: A study on pre-packed coffee products
Phthalate plasticizers and heavy metals are widely recognized to be pollutants that interfere with key developmental processes such as masculinization. We investigated the release of phthalates and heavy metals in coffee brewed from coffee packed in single-serve coffee containers made from different types of materials: metal, biodegradable and plastics. We detected with GC-MS small amounts phth...
متن کاملPre-packed vacuum bone cement mixing systems. A further step in reducing methylmethacrylate exposure in surgery.
OBJECTIVES Polymethylmethacrylate bone cements are widely used in orthopaedic and trauma surgery as well as in dentistry. The toxic side effects of inhaled methylmethacrylate (MMA) fumes generated during mixing have been well studied. Vacuum cement mixing systems have been shown to reduce the risk of airborne MMA significantly compared to handmixing. In an effort to further reduce MMA exposure,...
متن کاملPre-packed reverse phase columns for isolation of complex lipids synthesized from radioactive precursors.
Pre-packed reverse phase columns (Bond Elut) were used for the separation of complex lipids, such as phosphatidylcholine, cerebrosides, sulfatides, and gangliosides, from their respective water-soluble radioactive precursors after their in vitro biosynthesis. After an incubation in vitro, the entire reaction mixture is passed through the column, where complex lipids are retained and the hydroph...
متن کاملKnife grid size reduction to pre-process packed beds of high- and low-moisture switchgrass.
A linear knife grid device was developed for first-stage size reduction of high- and low-moisture switchgrass (Panicum virgatum L.), a tough, fibrous perennial grass being considered as a feedstock for bioenergy. The size reduction is by a shearing action accomplished by forcing a thick packed bed of biomass against a grid of sharp knives. The system is used commercially for slicing forages for...
متن کاملAre proteins well-packed?
The average packing density inside proteins is as high as in crystalline solids. Does this mean proteins are well-packed? We go beyond average densities, and look at the full distribution functions of free volumes inside proteins. Using a new and rigorous Delaunay triangulation method for parsing space into empty and filled regions, we introduce formal definitions of interior and surface packin...
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ژورنال
عنوان ژورنال: Acta Oeconomica Pragensia
سال: 2018
ISSN: 0572-3043,1804-2112
DOI: 10.18267/j.aop.608