One important requirement for accurate monitoring of radon in working environments, dwellings, and outdoors is to ensure that the measurement instrumentation is properly calibrated against a recognized standard. To achieve this goal, the U.S. Department of Interior Bureau of Mines (BoM) Radiation Laboratory has participated since 1983 in a program to establish international radon measurement st...

The interconversions of C1-substituted folates form the core of plant one carbon metabolism. An analytical method for extraction, purification and liquid chromatography−electrospray-ionization mass spectrometry detection of low level, labile tetrahydrofolate monoglutamates from Arabidopsis thaliana was developed in this study. Under gold fluorescent light, folates were extracted by homogenizing...

A mercury (Hg) saturation assay for measuring metallothionein (MT) in fish liver was modified by optimizing binding conditions to minimize the mercury and tissue consumed. The revised method uses stable Hg at low concentrations instead of 203Hg. At the reduced Hg concentrations used, MT concentrations in livers homogenized in saline appeared to increase systematically with dilution in both blue...

Abstract The chapter explores the way in which people under conditions of movement and change deal with plurality contemporary urban settings by tracing home-making experiences a group Mexican professionals Madrid (postgraduate students, academics, IT professionals, journalists, others). While their idea home aligns discursively within an ideal version cosmopolitanism (“at everywhere”), practic...

A novel method of combined argon gas stirring and bottom-rotating electromagnetic stirring in a ladle refining process is presented in this report. A three-dimensional numerical model was adopted to investigate its effect on improving flow field, eliminating temperature stratification, and homogenizing concentration distribution. The results show that the electromagnetic force has a tendency to...

In recent years, encapsulation of drugs and antigens in hydrogels, specifically in calcium alginate particles, is an interesting and practical technique that was developed widespread. It is well known that alginate solution, under proper conditions, can form suitable nanoparticles as a promising carrier system, for vaccine delivery. The aim of this study was to synthesis alginate nanoparticles ...

The “discouragement effect” (DE) is mentioned routinely as a reason for why heterogeneity detrimental incentives in contests. It serves theoretical argument various policies aimed at homogenizing contestants.We show that static, noisy contests, the DE not generic and robust often implied literature. We divide widely used contest models into two classes. In first class, either decreases or incre...

Exotic species have begun to homogenize the global biota, yet few data are available to assess the extent of this process or factors that constrain its advance at global or continental scales. We evaluate homogenization of vascular plants across America north of Mexico by comparing similarity in the complete native and exotic floras between states and provinces of the USA and Canada. Compared w...