macro-Kjeldahl method

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mac·ro-Kjel·dahl meth·od

(kyel'dahl),

a procedure for analyzing the content of nitrogenous compounds in urine, serum, or other specimens, usually to determine relatively large amounts of nitrogen (for example, 20-100 mg); the specimen is treated with a digestion mixture (copper sulfate and sulfuric acid), heated thoroughly, and made alkaline with a solution of sodium hydroxide; ammonia is then distilled from the mixture, trapped in a boric acid-indicator solution, and titrated with standard hydrochloric or sulfuric acid.

[Johan G. C. Kjeldahl]

Farlex Partner Medical Dictionary © Farlex 2012

Kjeldahl,

Johan G.C., Danish chemist, 1849-1900.

Kjeldahl apparatus - an apparatus used in nitrogen analysis.

Kjeldahl method

macro-Kjeldahl method - a procedure for analyzing the content of nitrogenous compounds in urine, serum, or other specimens.

micro-Kjeldahl method - a modification of the macro-Kjeldahl method designed for the analysis of nitrogenous compounds in relatively small quantities.

Medical Eponyms © Farlex 2012

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(8) Type 1 DM (1) The total protein was determined by the Kjeldahl method, lactose by enzymatic hydrolysis and fat by gravimetry after extraction with methylene chloride by the modified Roese-Gottlieb method Bitman et al.

Do maternal morbidities change the nutritional composition of human milk? A systematic review

The ammonia nitrogen (N-NH3) concentration was determined after samples were centrifuged at 3,000 rpm/15 min, using the supernatant for analysis by Kjeldahl method INCT-CA N-007/1 [14].

Can cactus (Opuntia stricta [Haw.] Haw) cladodes plus urea replace wheat bran in steers' diet?

The first test was ammonia determination by Kjeldahl method; six bacterial cultures were kept in soil for two weeks to find the microorganism, which could highly produce ammonia.

Screening of Microorganisms from Homemade Biofertilizers to Promote Plant Growth

The a-amino nitrogen was determined by formol titration according to the method as described by Taylor [10], and the total protein nitrogen was determined by the Kjeldahl method [11].

Angiotensin-I-Converting Enzyme Inhibitory Activity and Antioxidant Properties of Cryptides Derived from Natural Actomyosin of Catla catla Using Papain

roseapbrunner for WSPP and WSPC, respectively, in comparison with that of its protein content, which was determined by the Kjeldahl method [16].

Characteristics, Functional Properties, and Antioxidant Activities of Water-Soluble Proteins Extracted from Grasshoppers, Patanga succincta and Chondracris roseapbrunner

Nitrogen, Sulfur, pectin, lignin, cellulose and hemicellulose were determined for acid digestion according to Kjeldahl method, which consists in the destruction of the sample with concentrated sulfuric acid in boiling, thus separating the nitrogen from its bond matrix and transforming into ammoniacal nitrogen, with a heating period of 4.5 h at 400[grados]C (15).

Caracterizacion de carbon activado sintetizado a baja temperatura a partir de cascara de cacao (Theobroma cacao) para la adsorcion de amoxicilina

Protein determination: Protein in the sample was determined by Kjeldahl method (Barbano and Clark, 1990).

NUTRITIONAL VALUE ASSESSMENT AND PROXIMATE COMPOSITION OF GAMMA IRRADIATED GRAPES

The protein content of the samples was analyzed using the analytical Kjeldahl method. A protein-peptide profile analysis was conducted using sodium-dodecyl-sulfate polyacrylamide gel electrophoresis (SDS-PAGE) and imaging analysis software.

Changes in protein, peptide composition affected by fermentation, non-fermentation processing

The percentage of carbon was determined by dichromatometry and [N.sub.total] by the Kjeldahl method. Sodium was determined by dilute hydrochloric acid solution and was subsequently determined using flame spectrophotometric apparatus.

Viability of polycultures of arugula-carrot-coriander fertilized with hairy woodrose under different population densities/Viabilidade de policultivos de rucula-cenoura-coentro adubados com jitirana sob diferentes densidades populacionais

The protein content in the supernatant was determined by the Kjeldahl method and percent protein solubility was calculated as follows:

IN-VITRO PROTEIN DIGESTIBILITY, CHEMICAL AND FUNCTIONAL PROPERTIES OF PROTEIN ISOLATES FROM RAW, DEFATTED AND UNDEFATTED FERMENTED MUNG BEAN

The N contents of grains were obtained by the kjeldahl method [15] and multiplied by 6.25 based on dry weight to calculate grain protein content (%).

Effect of poultry litter on protein, oil and mineral contents of Maize (Zea mays L)

Nitrogen content of dried camel milk was determined by Kjeldahl method and then multiplying that by a factor 6.37.