Authors: Rufu Wang , Ping Wu , Yong Liu , Rong Wang

In Biochemistry, Chemistry

By Science Publishing Group

Poly-ferric magnesium sulfate coagulant as another water purifying agent besides poly-aluminum multi-salt can be quantitatively produced through ferrous sulfate oxidation with high product concentration. This article starts with the selection of raw material, then elaborates process flow from a small-scale lab simulate experiment to a large-scale production of this high concentration water purifying agent. According to the corporate technical standard of this product, chemical compositions of the primary material (ferrous sulfate heptahydrate) and auxiliary materials (alkalizing agent, oxidizer, etc.), and the alkalinity of the product (B=8%), this article provides calculation of the raw materials’ input and output for producing 1 ton of the product liquid. The reaction is carried out step-by-step in a heating reactor equipped with acidic mist re-flux tower and filtration devices. The first step: ferrous sulfate oxidation by sodium chlorate; the second step: polymerization, precipitation, and filtration separation; the third step: arsenic and heavy metal check and precipitate separation by flocculating precipitant and metal chelating precipitant; last, use the laboratory test results to back calculating alkalinity (B%), coagulation strength (C%), and molecular formula of the final product liquid. This article not only rationalizes the feasibility with chemical/physical mechanisms this technique, formulation, production method, but also guides through the back calculation to provide data of the properties as a documentation of the certificate of analysis for the product.

Authors: Hebah Abdel-Wahab , Tamara Gund

In Chemistry

By Science Publishing Group

Liquids can be flammable, combustible or can be neither flammable nor combustible liquids. Liquids with flash points below 100 F, 37.8 degree Celsius are flammable liquids. Liquids with flash points at or above 100°F, 37.8 degree Celsius are known to be combustible liquids. The lower the flash point is the higher the flammability of the liquid. Some solutions and liquids can conduct an electrical current by producing ions. Solutions are ether electrolytes or non-electrolytes. Electrolyte solutions can conduct electrical current. On the contrary to electrolytes, non-electrolytes don’t conduct an electrical current as they don’t dissociate into ions in solution. A non-halogenated compound is a compound that doesn’t contain a halogen element in their composition. This research is aimed to find a commercially available liquids and solutions that are non- halogenated, non-combustible, are liquids or in liquid-vapor equilibrium at ambient conditions, have a normal boiling point of ≥80°C, and aren’t electrically conductive, and to determine whether some suggested chemical compounds would meet the criterion: chloroform, carbon tetrachloride, bromine, mercury, and 100% concentrated sulfuric acid. Possible classes of compounds that meets the criterion requested are inorganic compounds including acids, bases, and salts, organic compounds including hydrocarbons, alcohols, esters, amines, aldehydes, ketones, carboxylic acids, carbohydrates, amino acids and proteins, and lipids. Most inorganic solvents and soluble inorganic compounds are electrically conductive, and most of classes of organic solvents and organic compounds are either flammable or combustible. It was found that most of the suggested chemical compounds don’t meet the criterion, and some chemical compounds meeting the criterion requested were identified.

Authors: Claude Berenger Ngantchouko Ngalemo , Gisele Laurel Tchiengang Tchoua , Francois Nicaise Bony , Blondin Gatien Tsawo , Patrick Yamen Mbopi , Stephane Kevin Ndengue Langoul , Jean Michel Tekam , Pierre Rene Fotsing Kwetche

In Chemistry, Chemical Engineering

By Science Publishing Group

Erectile dysfunction has become for two decades, a real public health problem. Its prevalence is estimated at 322 million in 2025. Its management is based on the administration of phosphodiesterase inhibitors alone or in combination. Infections have been rarely mentioned although E coli, Staphylococcus aureus, Klebsiella pneumoniae or Serratia marcescens are recognized as factors of erectile dysfunction. The purpose of this study was to evaluate the phytochemical profile of the aqueous (AE) and hydroethanolic (HE) extracts of the fresh leaves of Gardenia aqualla and to determine their antibacterial potential on bacteria involved in male accessory gland infections. The aim of this study was to evaluate phytochemical profile of aqueous (AE) and hydroethanolic (HE) extracts of fresh leaves of Gardenia aqualla and to determine their antibacterial potential on bacteria involved in male accessory gland infections. Phytochemical profile highlighted the presence of alkaloids, polyphenols with concentrations of 434.5 ± 14.5 mgEq Tannic acid/g of dried extract greater than 249.5±18.3 mgEq Tannic acid/g of dried extract found in AE including flavonoids whose concentrations is 184.9 ± 6.3 μgEqRutin/g of dry extract in HE against 183.0±9.1 μgEqRutin/g of dried extract in AE. Antibacterial tests showed equivalence of activity on E coli and S aureus strains with MICs of 100 mg/mL and 50mg/mL respectively and only HE showed activity on Klebsiella pneumoniae and Serratia marcescens which had the lowest MIC 6.25 mg/mL.