Effect of Sintering Atmosphere on Phase Evolution of Hydroxyapatite Nanocomposite Powders

In the present work, pure hydroxyapatite, hydroxyapatite-20 wt% alumina and hydroxyapatite-20 wt% titanium mixtures were pressed and sintered in air, moist, and reduction atmospheres at 1200 C for 2 h. XRD investigations of sintered samples showed that, pure hydroxyapatite is stable in all three atmospheres. But, moist and reduction atmospheres were preferred to suppress the hydroxyapatite decomposition in hydroxyapatite -alumina and hydroxyapatite – titanium nanocomposites, respectively. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3494

Dielectric properties measurements of brown and white adipose tissue in rats from 0.5 to 10 GHz

Brown adipose tissue (BAT) plays an important role in whole body metabolism and with appropriate stimulus could potentially mediate weight gain and insulin sensitivity. Although imaging techniques are available to detect subsurface BAT, there are currently no viable methods for continuous acquisition of BAT energy expenditure. Microwave (MW) radiometry is an emerging technology that allows the quantification of tissue temperature variations at depths of several centimeters. Such temperature differentials may be correlated with variations in metabolic rate, thus providing a quantitative approach to monitor BAT metabolism. In order to optimize MW radiometry, numerical and experimental phantoms with accurate dielectric properties are required to develop and calibrate radiometric sensors. Thus, we present for the first time, the characterization of relative permittivity and electrical conductivity of brown (BAT) and white (WAT) adipose tissues in rats across the MW range 0.5-10GHz. Measurements were carried out in situ and post mortem in six female rats of approximately 200g. A Cole-Cole model was used to fit the experimental data into a parametric model that describes the variation of dielectric properties as a function of frequency. Measurements confirm that the dielectric properties of BAT (εr = 14.0-19.4, σ = 0.3-3.3S/m) are significantly higher than those of WAT (εr = 9.1-11.9, σ = 0.1-1.9S/m), in accordance with the higher water content of BAT

Influence of zinc incorporation on microstructure of hydroxyapatite to characterize the effect of pH and calcination temperatures

AbstractThis work was focused to study the existence of Zn2+ in structure, chemical composition as well as particle and crystallite size of hydroxyapatite (HAp) to characterize the effect of pH of the solution and calcination temperature. Non-stoichiometric HAp (nHAp) powders containing 4at.% zinc fraction were synthesized via solution–precipitation method. In order to characterize the effect of pH (values: 9 and 10.5) and two calcination temperatures (550 and 1000°C) on chemical composition, molecule internal bonds, particle and crystallite size of the synthesized powders, XRD, EDS, FTIR and SEM techniques were utilized. The results showed that zinc cations could be incorporated in the HAp atomic structure to form low crystalline single phase of nHAP. The pH adjustment to 10.5 caused the formation of powders with smaller particle and crystallite sizes. The results also indicated that calcination temperature up to 1000°C caused decomposition of zinc doped nHAp to β-tri calcium phosphate and tri zinc calcium phosphate phases which are used to control the speed of biodegradation

Refugee Arrivals in the Mountain West, 2017-2021

This fact sheet displays data on the influx of refugee arrivals by nation to five Mountain West States: Arizona, Colorado, Nevada, New Mexico, and Utah. Refugee Processing Center data, selected from annual reports and limited to the years 2017-2021, are presented

A case report of Enteritis Redmouth Disease in cultured rainbow trout (Oncorhynchus mykiss) in Kohkyloyeh va Boyerahmad Province in Iran

An unknown mortality was occurred in some ponds of a farm in an area of Kohgiloyeh-&- Boyerahmad province. Three ponds showed the highest mortality rate, about 5 to 20 dead fish were reported daily for 45 days. Afflicted fish have darkening in the skin and swimming near surface or at the floor of pond and swam unmatched with flock. Some fish showed hemorrhages around and within the oral cavity and exophthalmia occasionally. About 45 moribund rainbow trout were sampled for dissection and bacteriological examination. Kidney, liver and spleen of the fishes were examined for the detection and identification of bacteria causative agent of disease in rainbow trout. They cultivated aseptically on different media (Blood Agar, Tryptic soy Agar, TCBS Agar and MacConkey Agar). All fish have been infected and suffered septicemia. A type of gram's negative bacteria was responsible of infection and mix infection was not confirmed. The bacterium was being able to grow on Mac Conkey agar. It was a bacterium very similar with Yersinia ruckeri which induced infection. Detection was based on clinical finding and bacteriological laboratory results so using of some confirmation methods such as FAT or PCR would be recommended strongly

Homelessness Estimates in the Mountain West, 2020

This fact sheet summarizes a recent report titled, “The 2020 Annual Homelessness Assessment Report (AHAR) to Congress,” by the U.S. Department of Housing and Urban Development. By synthesizing homelessness vulnerability categories to the Mountain West states, this report offers data for Arizona, Colorado, Nevada, New Mexico, and Utah

Operating Solar Projects in Nevada, 2021

The U.S. Energy Information Administration (EIA) and the Solar Energy Industries Association (SEIA) both provide national databases that contain comprehensive lists of active solar projects in the United States. This fact sheet provides a list of operating solar projects in the State of Nevada

Mountain West States Most Dependent on the Federal Government, 2022

This fact sheet synthesizes data from the SmartAsset report, “States Most Dependent on the Federal Government – 2022 Edition.” This fact sheet explores federal government dependency for the following Mountain West states: Arizona, Colorado, Nevada, New Mexico, and Utah

Refugee Arrivals in the Mountain West, FY 2021-2022

This fact sheet explores data on the influx of refugee arrivals by nation to the Mountain West region: Arizona, Colorado, Nevada, New Mexico, and Utah. Refugee Processing Center data, selected from annual reports and limited to the years 2021-2022, are presented in this factsheet

Race Equity in Management Occupations in the Mountain West

In a recent report, “From commitments to action: How CEOs can advance racial equity in their regional economies,” Amy Liu and Reniya Dinkins of the Brookings Institution Metropolitan Policy Program highlight racial equity issues in private sector management occupations. The authors use these data to propose strategies to close equity gaps. This fact sheet examines data for the Mountain West metropolitan areas included in the original report