a chemical added to a water sample to keep it stable and prevent compounds in it from changing to other forms or to prevent microorganism densities from changing prior to analysis
A substance used to prevent the growth of microorganisms in or on an organic base An example is an ingredient in latex paint used to prevent spoilage
Gum, glue and egg media all putrefy if kept for any length of time without a preservative The level of the preservative used is kept low in order not to damage the painting in the long term Alcohol is an extremely effective preservative for the above-mentioned media, if it is present in a high enough concentration It evaporates off when the medium is used, leaving behind no active ingredient in the painting However, it is never added directly to the mixtures, as it will cause them to congeal Instead it is added to the water used in the making of the gum, glue and egg media
A preservative is a chemical that prevents things from decaying. Some preservatives are added to food, and others are used to treat wood or metal. Nitrates are used as preservatives in food manufacture. a chemical substance that is used to prevent things from decaying, for example food or wood. Any of numerous chemical additives used to prevent or slow food spoilage caused by chemical changes (e.g., oxidation, mold growth) and maintain a fresh appearance and consistency. Antimycotics (e.g., sodium and calcium propionate, sorbic acid) inhibit mold growth; antioxidants (e.g., butylated hydroxytoluene or BHT) delay rancidity in foods containing fats and oils; antibiotics (e.g., tetracyclines) prevent bacterial growth; humectants retain moisture in products like shredded coconut; and antistaling agents (e.g., glyceryl monostearate) maintain moisture and softness in baked goods. Some preservatives also improve the appearance of the product (e.g., sodium nitrate and nitrite in meats)
a chemical compound that is added to protect against decay or decomposition tending or having the power to preserve; "the timbers should be treated with a preservative
Food presevative - Any additive that help maintain a food's freshness and keep it from spoiling or oxidizing
Any substance effective in preventing the development and action of wood-rotting fungi, borers of various kinds, and harmful insects that cause the deterioration of wood
Substance that will prevent the development of wood-destroying fungi, borers of various kinds, and other harmful insects that deteriorate wood
Any substance which can be introduced into wood to prevent the development or action of decay or deterioration by insects and other organisms for a reasonable length of time
any agent, natural or artificial that acts to preserve, especially when added to food
A chemical applied to logs or timbers to protect them from decay and the effects of weathering Preservatives may contain a mixture of chemicals designed to protect against different threats such a mold, mildew or ultraviolet light
Any substance that, for a reasonable length of time, will prevent the action of wood-destroying fungi, borers of various kinds, and similar destructive agents when the wood has been properly coated or impregnated with it
Having the power or quality of preserving; tending to preserve, or to keep from injury, decay, etc
tending or having the power to preserve; "the timbers should be treated with a preservative"
fekondasyona engelolmak için kullanılan lastik kılıflar, kaput, prezervati