We have investigated the proliferative responses of rat thyroid follicular cells in serum-free culture to a range growth factors including TSH, epidermal factor, and insulin, added singly or combination. Follicles released from normal thyroids by collagenase/dispase digestion were cultured suspension agarose-coated microtiter plates prevent monolayer formation. Growth measured [3H] thymidine incorporation autoradiography over successive 24- 36-h periods. Insulin, even absence other factors,...

Current efforts are underway to quantify the chemical concentration in a treated air space that elicits spatial repellent (deterrent) response vector population. Such information will facilitate identifying optimum active ingredient (AI) dosage and intervention coverage important for development of tools – one several novel strategies being evaluated vector-borne disease control. This study reports initial findings from sampling experiments conducted under field conditions describe...

In this paper we describe a new structural type of metaborate anion. It consists three-dimensional framework in which the boron atoms are situated at vertices Fedorow's truncated octahedron. Each atom is surrounded by four oxygen forming tetrahedra linked to form This anion, appears Zn4O(BO2)6, very similar (Al3Si3O12)3− ion sodalite.

Abstract A rapid detection method for the chemical warfare nerve agent VX was developed using SPME and gas chromatography/mass spectrometry (GC/MS). Five commercially available fiber coatings were evaluated to determine optimal coating conditions extraction. The use of silanized vials found be necessary limit interaction basic tertiary amine component with acidic silanols present in standard glass vials. polydimethylsiloxane (PDMS) ultimately selected completion this work extractions being...

The highly luminescent bimetallic cyanide materials, Gd(terpy)(H2O)(NO3)2M(CN)2 (M = Au, Ag; GdAu and GdAg, respectively) are quick easy to synthesize under ambient conditions. A characteristic feature exhibited by both solid-state compounds is an intense red emission when excited with UV light. Additionally, exhibits a broad-band green upon excitation in the near region. combination of structural spectroscopic results for helps explain underlying conditions responsible their unique...

Hazardous atmospheres in confined spaces may be obvious when a source of air contamination or oxygen (O2) deficiency is recognized. Such often the case general industry settings, especially with work processes which create hazardous that anticipated. Hazards present active sewers are also well recognized; but possibility O2 high airborne contaminant concentrations exist new construction storm drains has been repeatedly ignored deadly results. Low and carbon dioxide (CO2) manholes have not...

theory has been developed to predict the average inter-fibre pressure in a twisted fibre assembly that is subjected tension. This extended rupture force an assembly, such as worsted roving, where takes place only by slippage. A wide range of experimental determinations have made and it shown that, general, there very close agreement between experiment. The was also calculate drafting caused roller-drafting on Bradford System. measured experimentally newly method and, again, found these...

o-Chlorobenzylidenemalonitrile, more commonly called CS, is grouped with several other irritant agents referred to as "tear gas." It a riot-control agent used frequently in military settings test the ability and speed of personnel donning their gas masks. When are exposed CS without proper personal protective equipment, it has potent effects. We report unique cluster hospitalizations nine U.S. Marines who developed transient pulmonary syndrome. All patients had symptoms cough shortness...

A portable dynamic air sampler and solid phase microextraction were used to simultaneously detect, identify, quantify airborne sarin with immediate analysis of samples using a field gas chromatography-mass spectrometry system. mathematical model was knowledge the mass trapped, linear velocity past exposed sampling fiber, sample duration allowing calculation concentration estimates. For organizations suitable instrumentation, these methods are potentially useful for rapid onsite detection...

Abstract The genotoxicity of nitrogen heterocycles isolated from a sediment taken the Black River near Loraine, Ohio, in an area that received effluents coking ovens steel plant was studied. These compounds were by gel permeation chromatography and silicic acid adsorption moderately polar fraction organic extract this sediment. Two complex mixtures secondary tertiary containing three to five aromatic rings characterized using capillary column gas with selective detection. Both induced...

Abstract Suitable detectors are needed to support survey needs of incident responders and health care personnel who may receive patients from an with exposures hazardous chemicals. In the setting, such a detector would avoid cross-contamination workers, patients, treatment facility associated equipment. An ideal be sensitive, hand-held, capable extended battery operation, provide nearly immediate response on exposure broad range high-concern For responders, important capabilities include...