Comparison between Water Hyacinth and Waste Cooking Oils as Source of Biofuel Production

The problem of fossil fuel increases by time around the world, Biodiesel is an environmentally friend renewable diesel fuel alternative. The present work aims to determine the possibility for biofuel production from non-edible plant (Water hyacinth) and waste cooking oils in addition to potential uses as source for glycerol, pigments and antioxidant compound sources. this study aimed to investigate the feasibility of biodiesel production from water hyacinth using two solvent systems (chloroform: methanol, 2:1v/v and Hexane), Moreover, WCO applying one steps alkaline transesterification process using methanol, NaOH (0.25) and KOH (0.25, 0.5 and 1g) as a catalyst and hot distilled water for purification. both produced biodiesel (from Eichhornia and WCO) was characterized using FTIR and some chemical constant such as IV, SV and AV. The highest biodiesel produced from Eichhornia recorded with chloroform: methanol system when compared with Hexane. However, the highest biodiesel produced from WCO was recorded when using KOH (0.25g). Also, the obtained results reported the possibility for use glycerol produced from the both biofuel sources in body butter (makhmaria) production, Authors concluded that, the produced biodiesel from both sources was within the recommended standards of biodiesel fuel. Also, water hyacinth became useful in antioxidant compounds production, the contained pigments may be used as natural coloring substances in different fields.

Advantages and Disadvantages of using Food Grate Stainless Steel Rods for Internal Fixation of Femoral Transverse Fractures in Rabbits (Review Study)

The present study designed to focus on the advantages and disadvantages of using food grate stainless steel rods (FGSR) as internal fixation methods for induced transverse fractures in the mid shift of the femoral bones in rabbits.200 cases were collected from 2007 to 2020, all these cases were employed to induced transverse fractures in the mid shift of femoral bone, 100 of them used the rods for internal fixation, 80 of the cases used the rods for fixation the natural xen- bony implantation from sheep or calves, and the others 20 cases used the rods for internal fixation of the synthetics nano bony implantation .The physical, chemical, clinical and radiographic parameters were used for evaluation, the physical and chemical analysis showed that the rods not change during sterilization, implantation or when exposed to different types of ray besides the chemical constant is about the same level measurement of the medical intramedullary pins (IMP), while the clinical observation revealed that the rods can used strongly and successfully for fracture fixation and support the animal to bear the weight, the limb used for walking gradually after 24-48 hours p. o. with some cases shown the FGSR pulled from the bone, other suffer from infection with pus formation with lateral deviation of the stifle joint or re-fracture. While the radiological finding revealed that the FGSR insert and fix the fractures fragment and the bony implantation, the pins seemed stable and fit the intramedullary canal and fracture fragments, while some cases shows that the pin not insert properly inside the femoral bone with case of multible and comminuted fractures, other case shown the FGSR pass and penetrate the stifle joint. The conclusion is, there are many advantages with minor or very little disadvantages for using the FGSR as internal fixation of the induced transverse fractures in the mid shift of the femoral bones and for natural and synthetics bony implantation in rabbits.

Alkaloids of Buxus sempervirens var rotundifolia BAILLON

Twenty one alkaloids were isolated from the leaves of Buxus sempervirens var rotundifolia BAILLON. Buxaminol-B, cyclobuxine-D, cyclovirobuxine-D, cycloprotobuxine-C, buxamine-E, buxtauine-M and buxpiine-K were those already known. New alkaloids, the constitution and configuration of which were inferred from physical data and corroborated by interconversion and correlation, were denominated buxithienine-M and cyclobuxophylline-O. The remaining bases were characterized by physico-chemical constant and/or spectral data.

A study of the vapour pressures of magnesium, thallium, and zinc, and the determination of their chemical constants

The thermodynamical vapour pressure equation log p = - ^ + Cp/nT - j* J^ 5 j* cp <rr + c , where y 0 is the latent heat of vaporization at absolute zero, C p the specific heat of the vapour at constant pressure and c p that of the condensate, involves knowledge of many thermal constants, and accurate determination of the vapour pressure of an element is therefore of considerable importance. The constant of integration C, known as the “chemical constant,” can be calculated, for statistical theory indicates that C = C0 + f log M + log g /g ', where C 0 is a universal constant ( = ^ ■, iS -j..'), r N ' M is the molecular weight, and g/g' is the ratio of the statistical weights in the vapour and condensed state respectively (monatomicity of the vapour is assumed), g' is taken to be unity, and g is obtained from spectroscopic data where g = 2 j + 1, the value being supported by the Stern and Gerlach magnetic experiments. Although it is possible to estimate the value of the constant in this way, and therefore from a knowledge of the vapour pressure to determine the entropy and other thermal constants of the metal, it has been necessary to check the validity of the statistical theory by careful measurement of the vapour pressure and energy terms of the thermodynamical equation, and so to evaluate the constant and compare it with the theoretical value.

The chemical constants of the vapours of hydrogen and of hydrogen chloride; and the entropy change accompanying the reaction H 2 + Cl 2 ⇄ 2HCl

In a paper called “The Chemical Constant of Hydrogen Vapour, and the Entropy of Crystalline Hydrogen,” the writer has investigated the vapour pressure of crystalline hydrogen at very low temperatures. He used the Einstein-Bose statistics for the hydrogen gas, and obtained results slightly different from those of Fowler, who had used the classical statistics for the vapour phase. The result found by the writer for the chemical constant i ' was in slightly better agreement with experiment than Fowler’s result, being larger than Fowler’s by log 10 1·04 = 0·02 at the temperatures of Eucken’s experiments. Also, the writer found that when hydrogen gas was condensed to the solid phase at these very low temperatures, the ratio of the number of ortho-hydrogen molecules to the number of para-hydrogen molecules in the crystalline phase, provided that most of the molecules were in the gaseous phase, was not 3 : 1 but instead about 3 ⅙ : 1. However, there was a mistake in the writer’s calculations. He carelessly omitted, from equations (5) and (5') of his paper on hydrogen, the factors involving the work of evaporation χ at the absolute zero, per molecule.