Soap is sodium or potassium salt of fatty acid produced by saponification reaction. Soap is used on a day to day basis by households. The physicochemical properties of soaps determine their quality and hence determine...Soap is sodium or potassium salt of fatty acid produced by saponification reaction. Soap is used on a day to day basis by households. The physicochemical properties of soaps determine their quality and hence determine their efficiency and their cleansing properties. It remains obscure the quality of the soaps that are sold in the local markets in Kenya and thus the need to assess them. Eight commercial washing soaps were analyzed for Matter insoluble in alcohol, moisture content, total fat matter, free caustic alkalinity, Percentage chloride, pH and Total alkali according to documented methods of analysis. Values of matter insoluble in alcohol ranged between 6.22% to 61.80%, moisture content ranged between 10.91% to 22.69%, total fat matter ranged between 22.64% to 70.51%, free caustic alkali ranged between 0.00% to 0.06%, percentage chloride ranged between 0.07% to 1.01%, pH ranged between 10.63 to 11.71 and total alkali ranged between 0.00% to 0.99%. This study showed that the free caustic alkalinity of all the analyzed soap samples were below the KEBS set limits hence no adverse effects on the cloth or skin, and the pH values for all analyzed soaps were within KEBS limits.展开更多
The aim of our study was to use a biosurfactant produced by Bacillus and Lactobacillus isolates as an antiseptic in the formulation of local soap. A total of 60 isolates were characterized by microbiological technique...The aim of our study was to use a biosurfactant produced by Bacillus and Lactobacillus isolates as an antiseptic in the formulation of local soap. A total of 60 isolates were characterized by microbiological techniques (30 Bacillus and 30 Lactobacillus) and the ability to produce biosurfactants was demonstrated by a hydrocarbon emulsification index (E24). The emulsification indexes (E24) varied from 9% to 100% for Bacillus and from 33% to 100% for Lactobacillus as well. The antagonistic assay showed that biosurfactants were able to inhibit the formation of biofilms and growth of pathogens such as Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, Bacillus cereus, Salmonella typhirium, Shigella boydii and Proteus mirabilis. The biosurfactant consortium (BioC) from Bacillus consortium and from Lactobacillus was able to inhibit biofilm formation and the pathogens growth. The BioC was stable to alkaline pH and the temperatures stability of Biosurfactant was ranging from 50°C to 90°C. The soap was made by the cold saponification process using one biosurfactant consortium formulated. This soap has a pH of 10 and showed good cleaning power and good foam stability. Similarly, the soap showed good antiseptic power and disinfection power against all pathogens tested. Handwashing is critical to preventing disease transmission. The persistence of pathogens in waste water was evaluated. The BioS produced showed good disinfection power against all pathogens tested. The valor of reduction on the hands and in the waste water was significantly more than compared to the control soaps used. This soap could be used in the prevention, fighting, and treatment of bacterial and viral infections.展开更多
有一种肥皂称Antibacterial(抗菌的)soaps,此外,还有其他声称能够抗菌的日常用品,如:lotions(洗液)and mouthwashes(漱口水)。本文对其广告宣传的作用(advertise themselves as fighting bacteria or microbes)表示了质疑。主要 原因在...有一种肥皂称Antibacterial(抗菌的)soaps,此外,还有其他声称能够抗菌的日常用品,如:lotions(洗液)and mouthwashes(漱口水)。本文对其广告宣传的作用(advertise themselves as fighting bacteria or microbes)表示了质疑。主要 原因在于:personal-care products may cause antibiotic resistance.本文提出一个重要的概念:excessive use of antibiotics。这使我们想起了中国的一句老话:过犹不及。展开更多
"Soap making is the perfect medium for me to combine the science of exact chemistry formulation with the art of creating an experience through shapes,colors,textures and scents that harness the natural goodness o..."Soap making is the perfect medium for me to combine the science of exact chemistry formulation with the art of creating an experience through shapes,colors,textures and scents that harness the natural goodness of botanical oils and extracts",says Ruth Ng,the founder of Sapo Soap Works.展开更多
文摘Soap is sodium or potassium salt of fatty acid produced by saponification reaction. Soap is used on a day to day basis by households. The physicochemical properties of soaps determine their quality and hence determine their efficiency and their cleansing properties. It remains obscure the quality of the soaps that are sold in the local markets in Kenya and thus the need to assess them. Eight commercial washing soaps were analyzed for Matter insoluble in alcohol, moisture content, total fat matter, free caustic alkalinity, Percentage chloride, pH and Total alkali according to documented methods of analysis. Values of matter insoluble in alcohol ranged between 6.22% to 61.80%, moisture content ranged between 10.91% to 22.69%, total fat matter ranged between 22.64% to 70.51%, free caustic alkali ranged between 0.00% to 0.06%, percentage chloride ranged between 0.07% to 1.01%, pH ranged between 10.63 to 11.71 and total alkali ranged between 0.00% to 0.99%. This study showed that the free caustic alkalinity of all the analyzed soap samples were below the KEBS set limits hence no adverse effects on the cloth or skin, and the pH values for all analyzed soaps were within KEBS limits.
文摘The aim of our study was to use a biosurfactant produced by Bacillus and Lactobacillus isolates as an antiseptic in the formulation of local soap. A total of 60 isolates were characterized by microbiological techniques (30 Bacillus and 30 Lactobacillus) and the ability to produce biosurfactants was demonstrated by a hydrocarbon emulsification index (E24). The emulsification indexes (E24) varied from 9% to 100% for Bacillus and from 33% to 100% for Lactobacillus as well. The antagonistic assay showed that biosurfactants were able to inhibit the formation of biofilms and growth of pathogens such as Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, Bacillus cereus, Salmonella typhirium, Shigella boydii and Proteus mirabilis. The biosurfactant consortium (BioC) from Bacillus consortium and from Lactobacillus was able to inhibit biofilm formation and the pathogens growth. The BioC was stable to alkaline pH and the temperatures stability of Biosurfactant was ranging from 50°C to 90°C. The soap was made by the cold saponification process using one biosurfactant consortium formulated. This soap has a pH of 10 and showed good cleaning power and good foam stability. Similarly, the soap showed good antiseptic power and disinfection power against all pathogens tested. Handwashing is critical to preventing disease transmission. The persistence of pathogens in waste water was evaluated. The BioS produced showed good disinfection power against all pathogens tested. The valor of reduction on the hands and in the waste water was significantly more than compared to the control soaps used. This soap could be used in the prevention, fighting, and treatment of bacterial and viral infections.
文摘有一种肥皂称Antibacterial(抗菌的)soaps,此外,还有其他声称能够抗菌的日常用品,如:lotions(洗液)and mouthwashes(漱口水)。本文对其广告宣传的作用(advertise themselves as fighting bacteria or microbes)表示了质疑。主要 原因在于:personal-care products may cause antibiotic resistance.本文提出一个重要的概念:excessive use of antibiotics。这使我们想起了中国的一句老话:过犹不及。
文摘"Soap making is the perfect medium for me to combine the science of exact chemistry formulation with the art of creating an experience through shapes,colors,textures and scents that harness the natural goodness of botanical oils and extracts",says Ruth Ng,the founder of Sapo Soap Works.
