WordNet
- fix or determine the value of; assign a value to; "value the jewelry and art work in the estate"
- the amount (of money or goods or services) that is considered to be a fair equivalent for something else; "he tried to estimate the value of the produce at normal prices" (同)economic value
- (music) the relative duration of a musical note (同)time value, note value
- relative darkness or lightness of a color; "I establish the colors and principal values by organizing the painting into three values--dark, medium...and light"-Joe Hing Lowe
- the quality (positive or negative) that renders something desirable or valuable; "the Shakespearean Shylock is of dubious value in the modern world"
- a numerical quantity measured or assigned or computed; "the value assigned was 16 milliseconds"
- an ideal accepted by some individual or group; "he has old-fashioned values"
- (usually used in combination) having value of a specified kind; "triple-valued"
- held in great esteem for admirable qualities especially of an intrinsic nature; "a valued friend"; "precious memories" (同)precious
- a chemical reaction in which an ester is heated with an alkali (especially the alkaline hydrolysis of a fat or oil to make soap)
- beliefs of a person or social group in which they have an emotional investment (either for or against something); "he has very conservatives values"
PrepTutorEJDIC
- 〈U〉(…の)『価値』,値打ち,有用性,重要性《+of+名》 / 〈U〉〈C〉(…の)『価格』,値段《+of+名》 / 〈U〉〈C〉《米》《修飾語句を伴って》(払った金銭に対する)正当な値打ち / 〈C〉(単語の)意味,意義 / 〈C〉値,数値 / 〈C〉音の長短 / 〈C〉色価,(色の)明暗の度 / 〈C〉《複数形で》(道義・倫理などの)価値基準,価値観 / (ある金額に)…‘を'『評価する』,見積もる《+名+at+名〈金額〉》 / …‘を'『高く評価する』,尊重する,重んじる
- 貴重な,高く評価される,大切な
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2016/10/03 01:17:17」(JST)
[Wiki en表示]
Saponification value (or "saponification number"/"Koettstorfer number",[1] also referred to as "sap" for short) represents the number of milligrams of potassium hydroxide required to saponify 1g of fat under the conditions specified.[2] It is a measure of the average molecular weight (or chain length) of all the fatty acids present. As most of the mass of a fat/tri-ester is in the 3 fatty acids, it allows for comparison of the average fatty acid chain length. The long chain fatty acids found in fats have a low saponification value because they have a relatively fewer number of carboxylic functional groups per unit mass of the fat as compared to short chain fatty acids. If more moles of base are required to saponify N grams of fat then there are more moles of the fat and the chain lengths are relatively small, given the following relation:
Number of moles = mass of oil/relative atomic mass
The calculated molar mass is not applicable to fats and oils containing high amounts of unsaponifiable material, free fatty acids (>0.1%), or mono- and diacylglycerols (>0.1%).
Handmade soap makers who aim for bar soap use NaOH (sodium hydroxide, lye). Because saponification values are listed in KOH (potassium hydroxide) the value must be converted from potassium to sodium to make bar soap; potassium soaps make a paste, gel or liquid soap. To convert KOH values to NaOH values, divide the KOH values by the ratio of the molecular weights of KOH and NaOH (1.403).
Standard methods for analysis are for example: ASTM D5558 for vegetable and animal fats, ASTM D 94 (for petroleum) and DIN 51559.
See also
- Acid number
- EN 14214
- Hydroxyl value
- Iodine number
- Saponification
References
- ^ "Koettstorfer number".
- ^ "Saponification value of Fat and Oil" (PDF). kyoto-kem.com. Retrieved July 8, 2016.
External links
- Estimation of Saponification Value of Fats/Oils
UpToDate Contents
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English Journal
- Effect of the refining process on Moringa oleifera seed oil quality.
- Sánchez-Machado DI1, López-Cervantes J2, Núñez-Gastélum JA3, Servín de la Mora-López G4, López-Hernández J5, Paseiro-Losada P5.
- Food chemistry.Food Chem.2015 Nov 15;187:53-7. doi: 10.1016/j.foodchem.2015.04.031. Epub 2015 Apr 18.
- We evaluated the physicochemical properties and oxidative stability of the oil extracted from the seeds of Moringa oleifera during its refining process. Refining is accomplished in three stages: neutralization, degumming, and bleaching. Four samples were analyzed, corresponding to each step of the p
- PMID 25976997
- Preparation and characterization of foxtail millet bran oil using subcritical propane and supercritical carbon dioxide extraction.
- Shi Y1, Ma Y2, Zhang R2, Ma H1, Liu B1.
- Journal of food science and technology.J Food Sci Technol.2015 May;52(5):3099-104. doi: 10.1007/s13197-014-1311-0. Epub 2014 Mar 6.
- The foxtail millet (Setaria italica Beauv) bran oil was extracted with traditional solvent extraction (SE), supercritical carbon dioxide extraction (SCE) and subcritical propane extraction (SPE) and analyzed the yield, physicochemical property, fatty acid profile, tocopherol composition, oil oxidati
- PMID 25892815
- Report-The fatty acid composition and physicochemical properties of the underutilised Cassia abbreviata seed oil.
- Dangarembizi R1, Chivandi E1, Dawood S2, Erlwanger KH2, Gundidza M3, Magwa ML4, Muredzi P5, Samie A6.
- Pakistan journal of pharmaceutical sciences.Pak J Pharm Sci.2015 May;28(3):1005-8.
- The fatty acid composition of the underutilised Cassia abbreviata seed oil was determined using gas chromatographic methods. C. abbreviata seeds yielded 9.53% of yellowish-green oil consisting mainly of oleic acid (37.8%), palmitic acid (26.5%), linoleic acid (26.7%), stearic acid (4.1%) and elaidic
- PMID 26004707
Japanese Journal
- Flash Extraction and Physicochemical Characterization of Oil from <i>Elaeagnus mollis</i> Diels Seeds
- Characterization of Palm Fatty Acid Distillate of Different Oil Processing Industries of Pakistan
- Physico-chemical Characteristics of Papaya (<i>Carica papaya</i> L.) Seed Oil of the Hong Kong/Sekaki Variety
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- Saponification value (or "saponification number"/"Koettstorfer number", [1] also referred to as "sap" in short) represents the number of milligrams of potassium hydroxide required to saponify 1g of fat under the conditions specified. It is ...
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