Many colorimetric tests for indole have been described since Gnezda (1899) first described the oxalic acid test. These have been ably discussed and compared by Fellers and Clough in 1925, together with a very complete bibliography. They concluded, as a result of comparative studies, that the Ehrlich test (1901) was the most accurate, reliable and simple for indole and skatole when unmixed. The ...

as an insecticide or for other purposes, and is kept in many homes. Kerosene poisoning is, therefore, a common cause of admission to children's hospitals in many parts of the world, for example the United States, Canada (Report of Subcommittee on Accidental Poisoning, 1962), Australia (Southby, 1965), Malta (Cachia & Fenech, 1964), and Turkey (Coruh & Inal, 1966). It is estimated that in the Un...

It goes without saying that crude oil is important for both developed and emerging economies, with crude oil-related expenditures representing a significant proportion of total economic inputs, and an even more substantial share of total energy consumption. For example, energy expenditures of about $1,233 billion in the US currently account for some 8.8% of its GDP (from a high of 13.7% in 1981...

Balanced equations of a binary mixture for molecular distillation (MD) were derived on the basis of relation of heat and mass transfer in liquid films on both the evaporating and condensing surface. Effects of feed temperature and condenser temperature on film thickness, film surface temperature and concentration, degree of evaporation and concentration of distillate were analyzed for MD. The l...

THE PURPOSE . A complex of various physico-chemical methods has been studied to explore the possibilities reuse oil residues (oil sludge) low-sulfur high-paraffin deposits Mangyshlak peninsula (Kazakhstan) as a promising raw material for boiler and marine fuel with improved operational environmental characteristics. METHODS. Determination conditional viscosity sludge (in degrees Engler, ° E) wa...

Biodiesel produced from vegetable oils, animal fats and algae oil is a renewable, environmentally friendly and clean alternative fuel that reduces pollutants and greenhouse gas emissions in marine applications. This study investigates the influence of biodiesel blend on the characteristics of residual and distillate marine fuels. Adequate correlation equations are applied to calculate the fuel ...

To examine the toxicity of cyclosiloxanes (CSs), the predominant low molecular weight cyclic silicones found in breast implants, we injected female CD-1 mice intraperitoneally with different doses of distillate (3.5-35 g/kg body weight) containing cyclosiloxane D3 (hexamethylcyclotrisiloxane; CS-D3), cyclosiloxane D4 (octamethylcyclotetrasiloxane; CS-D4), cyclosiloxane D5 (decamethylcyclopentas...

background  apnea is one of the most common problems in preterm neonates. this study aimed to evaluate the effectiveness of aromatherapy on the reduction of apnea, bradycardia, and pulse oximetry (spo2) in premature infants. materials and methods in a clinical trial study, 60 preterm neonates randomly divided in two groups and exposed to aromatherapy with rosa damascenes distillate or distilled...

The aim of the research was to study features distribution impurity metals in distillates several types heavy oil produced Uzbekistan, mixed with gas condensate. It has been revealed that basic mass impurities original is represented mainly by calcium salts petroleum acids. Thermal decomposition metal naphthenates accompanied formation highly corrosive organic concentration organometallic compo...

12 Some guidelines to evaluate distillation columns, considering only basic 13 thermodynamic data and principles, are provided in this paper. The method allows a 14 first insight to the problem by simple calculations, without requiring column variables 15 to ensure rational use of energy and low environmental impact. The separation system is 16 approached by two complementary ways: minimum and ...