Dictionary » A » Alkali



Origin: f. Alcali, ultimately fr. Ar. Alqali ashes of the plant saltwort, fr. Qalay to roast in a pan, fry.

1. Soda ash; caustic soda, caustic potash, etc.

2. (Science: chemistry) One of a class of caustic bases, such as soda, potash, ammoma, and lithia, whose distinguishing peculiarities are solubility in alcohol and water, uniting with oils and fats to form soap, neutralising and forming salts with acids, turning to brown several vegetable yellows, and changing reddened litmus to blue. Fixed alkalies, potash and soda. Vegetable alkalies. Same as alkaloids. Volatile alkali, ammonia, so called in distinction from the fixed alkalies.

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genetic engineering- not understanding some concepts

... I can get answered. Thank you :) 1. When making mRNA to DNA, we use reverse transcriptase. When the cDNA is made and we remove the mRNA by adding alkali. Is the complementary DNA strand now made using DNA Polymerase I or III? 2. In genetic engineering, when a recombinant dna enters a host cell, ...

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by radioinahole
Fri Oct 21, 2011 2:38 pm
Forum: Molecular Biology
Topic: genetic engineering- not understanding some concepts
Replies: 2
Views: 2201

Differences Between Inorganic and Organic Catalysts

... conditions as 20-40°C, pH around 7, "normal" pressure, while inorganic catalysts usually require high temperatures, highly acidic or alkali pH and high pressure (think about hydrogenation on Pt or NH3 synthesis)

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by JackBean
Sun Mar 20, 2011 6:04 pm
Forum: Microbiology
Topic: Differences Between Inorganic and Organic Catalysts
Replies: 3
Views: 5712

Fats within the bone marrow of long bones

... course they do not adress the cleaning inside the bones. But some of the advice might be helpful. Otherwise rather than detergent, boiling with an alkali will cause saponification of the fat, which should help with removal. However I do not know if that might damage the structure of the bone. Alternatively ...

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by canalon
Wed Feb 16, 2011 8:04 pm
Forum: General Discussion
Topic: Fats within the bone marrow of long bones
Replies: 2
Views: 2393

Ion uptake in freshwater teleosts?

... concentracion because it decrease and the pH become alkaline. It follows that the measurment of the membrane potential produced/produces an "ALKALI ERROR" because the sites have become occupied by sodium ions (i.e. the quantity of the sodium ions outside is greater than inside) instead ...

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by anastasianikifor
Thu Aug 26, 2010 9:15 am
Forum: Physiology
Topic: Ion uptake in freshwater teleosts?
Replies: 2
Views: 6869

The application of Sodium borohydride

... and thiophenicol. Various steroids and vitamin A are prepared using sodium borohydride in at least one step.Sodium borohydride is a source of alkali, which is corrosive, and hydrogen or diborane, which are inflammable. Spontaneous ignition can result from solution of sodium borohydride in ...

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by wk396
Thu Mar 04, 2010 6:48 am
Forum: Molecular Biology
Topic: The application of Sodium borohydride
Replies: 0
Views: 2395
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