Development Of a Wearable for Remote Health Monitoring in Infants

The extremely undesired occurrence of sudden infant death syndrome (SIDS) begins with an infant who is put without constant check, although most of the infants are apparently healthy. The need to circumvent such occurrences demands at least keeping a constant check on the child’s vital physiological changes by all means, most importantly remotely. When a child is going through distress the most likely change observed instantly is their heart rate and temperature. The device designed and built in this work would help keep check on the body temperature as well as heart rate. This health monitoring device would get signals from the wearable worn by the child whenever there is a change in temperature and heart rate, and send the vital parameters to the guardians wirelessly. With this kind of device in place, presented simply in form of a wearable, the growing rate of infant mortality due to lack of care givers and close attention or any form of negligence would be curbed

EFFICACY OF HYDROTROPES ON THE SOLUBILITY OF FORSKOLIN IN WATER

Objective: The main purpose of this study is to assess quantitatively, the effect of the addition of hydrotropes, namely urea, sodium salicylate, and sodium benzoate on the solubility of forskolin in water, and to compare the efficacy of hydrotropes in increasing aqueous solubility of forskolin. Hydrotropes were chosen for this study, based on their wavelengths, and physical properties. Methods: The maximum wavelength of absorption of forskolin was determined spectrophotometrically, using a UV-Vis spectrometer. It was found to be 220 nm and was instrumental in the selection of hydrotropes for this experiment. Physical properties (viscosity, specific gravity and surface tension) of the chosen hydrotropes, namely sodium salicylate, urea, and sodium benzoate, were measured, over a range of concentrations and they indicated the approximate value of the minimum hydrotrope concentration of each hydrotrope. Stock solutions (1M) of the hydrotropes chosen, were prepared, and this was followed by, preparation of standard samples of forskolin, in hydrotropic solutions. These samples were analyzed spectroscopically, to obtain the characteristic calibration curves, for each hydrotrope. Solubility studies were then conducted, and the data obtained, was used to calculate enhancement ratios, which is a measure of the efficacy of a hydrotrope, in increasing aqueous solubility of a solute. Results: The addition of hydrotropes showed a remarkable increase in aqueous solubility of forskolin. Sodium salicylate proved more effective registering an enhancement ratio of 297.02, compared to sodium benzoate, which recorded a ratio of 296.97 and urea which showed a ratio of 43.35. Conclusion: Sodium salicylate and sodium benzoate showed very high enhancement ratios when compared to urea. This enhanced performance can be attributed to the large number of carbon atoms and the cyclic structure, which increases the hydrophobic nature of the hydrotrope. Higher efficacy of sodium salicylate can be ascribed to, the presence of hydroxyl group which increases the aqueous solubility of sodium salicylate, leading to better hydrotropic action. Keywords: Forskolin, Hydrotropy, Solubility, UV Spectrometry, Sodium salicylate, Sodium benzoate, Ure

A highly stable bimetallic transition metal phosphide catalyst for selective dehydrogenation of n‐heptane

In this work, we demonstrate RuP2-MoP catalystsbeing highly stable and selective for the dehydrogenation of longchainalkanes like n-heptane. Compared to a monometallic MoPcatalyst, the bimetallic system substantially increases n-hepteneselectivity from 40% towards 80%. This effect can be traced backto a reduced surface acidity, suppressing the competitivehydrogenolysis reaction. The active transition metal phosphide is,furthermore, compared to its phosphorous-free RuMo-counterpart.As revealed by STEM-EDX investigations, incorporation ofphosphorous results in the formation of separated metalphosphide clusters instead of an intermetallic alloy. In thedehydrogenation of n-heptane the phosphorous modificationclearly avoids catalyst deactivation and maintains the highn-heptene selectivity. X-ray diffraction, elemental analysis andSTEM-EDX further reveal that catalyst coking and the formationof less active molybdenum carbide phases is effectivelysuppressed by phosphorous incorporation, making RuP2-MoP anattractive system for selective dehydrogenation of long-chainalkanes

Stable and Selective Dehydrogenation of Methylcyclohexane using Supported Catalytically Active Liquid Metal Solutions – Ga 52 Pt/SiO 2 SCALMS

The use of gallium‐rich, Supported Catalytically Active Liquid Metal Solution (SCALMS) is a promising new concept to achieve catalysis with atomically dispersed active metal atoms. Expanding our previous work on short alkane dehydrogenation, we present here the application of SCALMS for the dehydrogenation of methylcyclohexane (MCH) to toluene (TOL) using a Ga52Pt alloy (liquid under reaction conditions) supported on silica. Cycloalkane dehydrogenation catalysis has attracted great attention recently in the context of hydrogen storage concepts using liquid organic hydrogen carrier (LOHC) systems. The system under investigation showed high activity and stable conversion of MCH at 450 °C and atmospheric pressure for more than 75 h time‐on‐stream (XMCH=15 %) with stable toluene selectivity (STOL) of 85 %. Compared to commercially available Pt/SiO2, the SCALMS system resulted in higher yields and robustness. Baseline experiments with Pt‐free Ga/SiO2 under identical conditions revealed the decisive influence of Pt dissolved in the liquid Ga matrix

Stable and Selective Dehydrogenation of Methylcyclohexane using Supported Catalytically Active Liquid Metal Solutions – Ga 52 Pt/SiO 2 SCALMS

The use of gallium‐rich, Supported Catalytically Active Liquid Metal Solution (SCALMS) is a promising new concept to achieve catalysis with atomically dispersed active metal atoms. Expanding our previous work on short alkane dehydrogenation, we present here the application of SCALMS for the dehydrogenation of methylcyclohexane (MCH) to toluene (TOL) using a Ga52Pt alloy (liquid under reaction conditions) supported on silica. Cycloalkane dehydrogenation catalysis has attracted great attention recently in the context of hydrogen storage concepts using liquid organic hydrogen carrier (LOHC) systems. The system under investigation showed high activity and stable conversion of MCH at 450 °C and atmospheric pressure for more than 75 h time‐on‐stream (XMCH=15 %) with stable toluene selectivity (STOL) of 85 %. Compared to commercially available Pt/SiO2, the SCALMS system resulted in higher yields and robustness. Baseline experiments with Pt‐free Ga/SiO2 under identical conditions revealed the decisive influence of Pt dissolved in the liquid Ga matrix