Used as feed supplement for sheep and cattle since it is a good non-protein nitrogen source. In strongly alkaline solution biuret gives a violet color with copper sulfate.
A reaction characterized by a violet color upon the addition of copper sulfate to all compounds with two amide or peptide bonds linked directly or through an intermediate carbon atom. Used in the detection and estimation of proteins and peptides having more than two amino acids.
An enzyme that catalyzes the hydrolysis of allophanic acid to two molecules of ammonia plus two molecules of "active carbon dioxide". EC 3.5.1.54.
Heterocyclic rings containing three nitrogen atoms, commonly in 1,2,4 or 1,3,5 or 2,4,6 formats. Some are used as HERBICIDES.
Any technique by which an unknown color is evaluated in terms of standard colors. The technique may be visual, photoelectric, or indirect by means of spectrophotometry. It is used in chemistry and physics. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
A species of gram-negative, facultatively anaerobic, rod-shaped bacteria that occurs in water, sewage, soil, meat, hospital environments, and on the skin and in the intestinal tract of man and animals as a commensal.

Daily and alternate day supplementation of urea or biuret to ruminants consuming low-quality forage: I. Effects on cow performance and the efficiency of nitrogen use in wethers. (1/12)

Two experiments were conducted to determine the influence of supplemental nonprotein N (NPN) provided daily (D) or every other day (2D) on ruminant performance and N efficiency. Treatments included an unsupplemented control (CON) and a urea (28.7% CP) or biuret (28.6% CP) supplement provided D or 2D at 0700. In Exp. 1, five wethers (39 +/- 1 kg BW) were used in an incomplete 5 x 4 Latin square with four 24-d periods to determine the influence of supplemental NPN source and supplementation frequency (SF) on the efficiency of N use in lambs consuming low-quality grass straw (4% CP). The amount of CP supplied by each supplement was approximately 0.10% of BW/d (averaged over a 2-d period). In Exp. 2, 80 Angus x Hereford cows (540 +/- 8 kg BW) in the last third of gestation were used to determine the effect of NPN source and SF on cow performance. The NPN treatments were formulated to provide 90% of the estimated degradable intake protein requirement. The supplemented treatments received the same amount of supplemental N over a 2-d period; therefore, the 2D treatments received double the quantity of supplemental N on their respective supplementation day than the D treatments. In Exp. 1, total DM, OM, and N intake; DM, OM, and N digestibility; N balance; and digested N retained were greater (P < 0.03) for supplemented than for CON wethers, with no difference (P > 0.05) between NPN sources or SF. Plasma urea-N (PUN) was increased with N supplementation compared with CON (P < 0.01), and urea treatments had greater PUN than biuret (P < 0.01). In addition, PUN was greater (P = 0.02) for D than for 2D treatments. In Exp. 2, pre- and postcalving (within 14 d and 24 h after calving, respectively) cow weight and body condition score change were more positive (P < 0.05) for supplemented groups than for CON. These results suggest that supplements containing urea or biuret as the primary source of supplemental N can be effectively used by lambs and cows consuming low-quality forage, even when provided every other day.  (+info)

Daily and alternate-day supplementation of urea or biuret to ruminants consuming low-quality forage: II. Effects on site of digestion and microbial efficiency in steers. (2/12)

Five steers (491 +/- 21 kg BW) were used in an incomplete 5 x 4 Latin square with four 24-d periods to determine the influence of supplemental non-protein N (NPN) source and supplementation frequency (SF) on nutrient intake and site of digestion in steers consuming low-quality grass straw (4% CP). Treatments (TRT) included an unsupplemented control and a urea- or biuret-containing supplement placed directly into the rumen daily (D) or every other day (2D) at 0700. The NPN treatments were formulated to provide 90% of the estimated degradable intake protein requirement. Daily TRT were supplemented CP at 0.04% of BW/d, whereas the 2D TRT were supplemented at 0.08% of BW every other day. Therefore, all supplemented TRT received the same quantity of supplemental CP over a 2-d period. Forage OM intake was not affected (P > 0.05) by NPN supplementation, NPN source, or SF; however, total OM and N intake were increased (P < 0.01) with CP supplementation. Duodenal flow of N was greater (P = 0.04) with CP supplementation compared with the control. In addition, duodenal bacterial N flow was increased with CP supplementation (P = 0.04) and for biuret compared with urea (P < 0.01). Bacterial efficiency (g bacterial N/kg OM truly digested in the rumen) was greater (P = 0.05) for biuret than for urea. Apparent total-tract N digestibility was increased with NPN supplementation (P < 0.01) but not affected by NPN source or SF. These results suggest that urea or biuret can be used effectively as a supplemental N source by steers consuming low-quality forage.  (+info)

Daily and alternate-day supplementation of urea or biuret to ruminants consuming low-quality forage: III. Effects on ruminal fermentation characteristics in steers. (3/12)

Five ruminally and duodenally cannulated steers (491 +/- 21 kg BW) were used in an incomplete 5 x 4 Latin square with four 24-d periods to determine the influence of supplemental nonprotein N (NPN) source and supplementation frequency (SF) on the dynamics of ruminal fermentation in steers consuming low-quality grass straw (4% CP). Treatments (TRT) included an unsupplemented control (CON) and a urea or biuret supplement that were placed directly into the rumen at 0700 daily (D) or every other day (2D). The NPN treatments were formulated to provide 90% of the estimated degradable intake protein requirement; therefore, the urea and biuret treatments received the same amount of supplemental N over a 2-d period. Daily TRT were supplemented with CP at 0.04% of BW/d, whereas the 2D TRT were supplemented at 0.08% of BW every other day. Forage was provided at 120% of the previous 5-d average intake in two equal portions at 0715 and 1900. Ruminal fluid was collected 0, 3, 6, 9, 12, and 24 h after supplementation on a day of and a day before supplementation for all TRT. Ruminal NH3-N increased (P < 0.04) with CP supplementation on the day all supplements were provided and on the day on which only daily supplements were provided compared with the CON. However, an NPN source x SF interaction (P = 0.03) on the day all supplements were provided indicated that NH3-N increased at a greater rate for urea as SF decreased compared with biuret. Ruminal NH3-N on the day only daily supplements were provided was greater (P = 0.02) for D compared with 2D. On the day all supplements were provided, D increased (P = 0.05) ruminal indigestible acid detergent fiber passage rate and ruminal fluid volume compared with 2D. These results suggest that urea or biuret can be used effectively as a supplemental N source by steers consuming low-quality forage without adversely affecting ruminal fermentation, even when provided every other day.  (+info)

Purification and characterization of TrzF: biuret hydrolysis by allophanate hydrolase supports growth. (4/12)

TrzF, the allophanate hydrolase from Enterobacter cloacae strain 99, was cloned, overexpressed in the presence of a chaperone protein, and purified to homogeneity. Native TrzF had a subunit molecular weight of 65,401 and a subunit stoichiometry of alpha(2) and did not contain significant levels of metals. TrzF showed time-dependent inhibition by phenyl phosphorodiamidate and is a member of the amidase signature protein family. TrzF was highly active in the hydrolysis of allophanate but was not active with urea, despite having been previously considered a urea amidolyase. TrzF showed lower activity with malonamate, malonamide, and biuret. The allophanate hydrolase from Pseudomonas sp. strain ADP, AtzF, was also shown to hydrolyze biuret slowly. Since biuret and allophanate are consecutive metabolites in cyanuric acid metabolism, the low level of biuret hydrolase activity can have physiological significance. A recombinant Escherichia coli strain containing atzD, encoding cyanuric acid hydrolase that produces biuret, and atzF grew slowly on cyanuric acid as a source of nitrogen. The amount of growth produced was consistent with the liberation of 3 mol of ammonia from cyanuric acid. In vitro, TrzF was shown to hydrolyze biuret to liberate 3 mol of ammonia. The biuret hydrolyzing activity of TrzF might also be physiologically relevant in native strains. E. cloacae strain 99 grows on cyanuric acid with a significant accumulation of biuret.  (+info)

Electroosmotic sampling. Application to determination of ectopeptidase activity in organotypic hippocampal slice cultures. (5/12)

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Defining sequence space and reaction products within the cyanuric acid hydrolase (AtzD)/barbiturase protein family. (6/12)

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Effects of dextran on five biuret-based procedures for total protein in serum. (7/12)

We evaluated the effect of dextran on values for total protein in serum as measured by the biuret method with five widely used automated instruments: the American Monitor Parallel; the Du Pont aca II; the Roche Cobas-Bio; the Kodak Ektachem 400; and the Beckman Astra 8. Dextran concentrations as great as 25 or 30 g/L had relatively little or no influence on total protein measurements by the latter three instruments. Dextran concentrations exceeding 6 g/L caused falsely low results with the aca, whereas the Parallel gave falsely high results when the dextran concentration exceeded 2 g/L. The aca total protein procedure could be protected from the interference by dextran concentrations up to 30 g/L by injecting 0.4-0.8 mL of ethylene glycol directly into the reagent pack before sampling. However, we could not eliminate the interference with the Parallel procedure by any simple means; we thus recommend that it not be used for measuring total protein in serum samples from patients who are being treated with dextran.  (+info)

Application of a silver-binding assay to the determination of protein in cerebrospinal fluid. (8/12)

We evaluated a silver-binding assay for use in measuring total protein in cerebrospinal fluid. The advantage of this procedure over other methods is that, because of its sensitivity, it requires only a 0.5-microL sample. The procedure, which takes approximately 40 min to complete, involves dilution of 0.5-microL samples to 1 mL with distilled water containing sodium dodecyl sulfate, followed by addition of glutaraldehyde and an ammoniacal silver solution. After color development for 30 min, the reaction is terminated with sodium thiosulfate and the absorbance is measured at 420 nm. This assay displayed within-run and day-to-day precision (CV) of 3.1% to 13% over the range of 210 to 1370 mg/L. It showed substantially less protein-to-protein variation than the Coomassie Blue dye-binding procedure when tested with albumin, globulin, and transferrin. It also yielded an accurate estimation of hemoglobin. Moreover, preliminary studies suggested that it was capable of quantifying immunoglobulin light chains and glycoproteins. In a study of 54 human cerebrospinal fluid samples, results of the silver-binding assay corresponded more closely with those obtained with a rate biuret assay (intraclass correlation coefficient = 0.91) than did either the dye-binding or classical Lowry methods.  (+info)

Biuret is a chemical compound that is commonly used as a reagent in medical and biological laboratories to detect the presence of proteins in a sample. It is a blue-colored compound that reacts with proteins to form a purple-colored complex, which can be easily detected by visual inspection or spectrophotometry. In medical applications, the biuret test is often used to determine the concentration of proteins in blood, urine, or other bodily fluids. It is also used in the diagnosis of certain medical conditions, such as kidney disease, liver disease, and diabetes, where protein levels in the blood or urine may be elevated. Overall, the biuret test is a simple and reliable method for detecting and quantifying proteins in biological samples, and it plays an important role in many areas of medical research and clinical practice.

Allophanate hydrolase is an enzyme that plays a role in the metabolism of certain drugs and toxins. It is responsible for breaking down a compound called allophanate, which is a byproduct of the metabolism of certain drugs, such as penicillamine and mercaptopurine. Allophanate hydrolase is found in the liver and other organs, and its activity is regulated by a number of factors, including genetic variations and the presence of certain drugs. In the medical field, the activity of allophanate hydrolase is often measured as a way to assess the effectiveness of certain drugs and to monitor the progression of certain diseases.

Triazines are a class of organic compounds that contain a three-membered nitrogen ring. They are commonly used as herbicides, pesticides, and fungicides. In the medical field, triazines have been studied for their potential use in the treatment of various conditions, including cancer, viral infections, and inflammatory diseases. Some specific examples of triazines that have been studied for medical use include protriptyline, a tricyclic antidepressant, and terbinafine, an antifungal medication. However, it is important to note that the use of triazines in medicine is still in the experimental stage, and more research is needed to fully understand their potential therapeutic benefits and risks.

The biuret test is a chemical test for proteins and polypeptides. It is based on the biuret reagent, a blue solution that turns ... The test and reagent do not actually contain biuret; they are so named because both biuret and proteins have the same response ... This notice reports that biuret reacts with alkaline copper sulfate to produce a red solution - the so-called "Biuret test" ... Wiedemann, G. (1848). "Biuret. Zersetzungsprodukt des Harnstoffs" [Biuret: decomposition product of urea]. Justus Liebig's ...
In enzymology, a biuret amidohydrolase (EC 3.5.1.84) is an enzyme that catalyzes the chemical reaction biuret + H2O ⇌ {\ ... The systematic name of this enzyme class is biuret amidohydrolase. This enzyme participates in atrazine degradation. Cook AM, ... displaystyle \rightleftharpoons } urea(CH4N2O) + CO2 + NH3 Thus, the two substrates of this enzyme are biuret and H2O, whereas ...
The biuret reaction can be used to assess the concentration of proteins because peptide bonds occur with the same frequency per ... In chemistry, the Biuret test (IPA: /ˌbaɪjəˈrɛt/, /ˈbaɪjəˌrɛt/), also known as Piotrowski's test, is a chemical test used for ... Despite its name, the reagent does not in fact contain biuret [(H2N−CO−)2NH]. The test is named so because it also gives a ... The Biuret reagent is made of sodium hydroxide (NaOH) and hydrated copper(II) sulfate, together with potassium sodium tartrate ...
Prior to winning the K-Pop India Contest, Techi toured with the Korean pop-rock band BIURET on their maiden visit to India. ... BIURET' Tour". The Pioneer. 1 November 2013. Retrieved 16 November 2013. K-Pop Entertainment Note: Tour commence on 2013-11-29- ...
"Feed-grade biuret". Food and Drug Administration. 1 April 2006. Archived from the original on 29 September 2007. Retrieved 6 ... NPN are given to ruminants in the form of pelleted urea, ammonium phosphate and/or biuret. Sometimes slightly polymerized ... For example, Archer Daniels Midland manufactures an NPN supplement for cattle, which contains biuret, triuret, cyanuric acid ...
The Biuret assay utilizes a biuret reagent which turns purple in the presence of proteins due to the chelation of copper salts ... "Biuret - an overview , ScienceDirect Topics". www.sciencedirect.com. Retrieved May 13, 2023. (Articles with short description, ...
Biuret Spofford, W. A.; Amma, E. L. (1972). "Crystal and molecular structure of dithiobiuret". Journal of Crystal and Molecular ...
"21CFR573.220 Feed-grade biuret". U.S. Food and Drug Administration. April 1, 2006. Retrieved 2007-05-06. "Roughage Buster Plus ... The first appearance of ammeline occurs prior to 225 °C and is suspected also to occur from decomposition of biuret but is ... Intermediates in the dehydration include both isocyanic acid, biuret, and triuret: H2N-CO-NH2 → HNCO + NH3 H2N-CO-NH2 + HNCO → ... For example, Archer Daniels Midland manufactures an NPN supplement for cattle, which contains biuret, triuret, cyanuric acid ...
Biuret is undesirable in urea fertilizer because it is toxic to crop plants to varying degrees, but it is sometimes desirable ... Biuret is formed when two molecules of urea combine with the loss of a molecule of ammonia. 2 NH2CONH2 → NH2CONHCONH2 + NH3 ... The most common impurity of synthetic urea is biuret, which impairs plant growth. Urea breaks down in the soil to give ammonium ... Fonnesbeck, Paul V.; Kearl, Leonard C.; Harris, Lorin E. (1975). "Feed Grade Biuret as a Protein Replacement for Ruminants. A ...
Retrieved 19 December 2017.[permanent dead link] Mikkelsen, R.L. (2007). "Biuret in Urea Fertilizers" (PDF). Better Crops. 91 ( ...
first (first ed.). Biuret, Lebanon: دار الغرب الإسلامي. p. 52. Archived from the original on 24 September 2020. Ibn Abi Usaibia ... Biuret, Lebanon: دار الكتب العلمية. p. 310. Archived from the original on 24 September 2020. Mahfouz, Muhammad (1982). تراجم ... 1995). عيون الأنباء في طبقات الأطباء (in Arabic) (first ed.). Biuret, Lebanon: دار مكتبة الحياة. p. 564. Archived from the ...
He received a PhD in 1957 for his work on the structure of biuret hydrate, where he completed most of the calculations for the ... His research group extended its interests beyond purely organic compounds and on to metal complexes (such as copper biuret, one ... Hughes, E. W.; Yakel, H. L.; Freeman, H. C. (1961). "The Crystal Structure of Biuret Hydrate". Acta Crystallogr. 14 (4): 345- ... "Crystallographic Studies of the Biuret Reaction". Nature. 184 (4687): 707-710. Bibcode:1959Natur.184..707F. doi:10.1038/ ...
Biuret test Bradford protein assay Van Noorden, R.; Maher, B.; Nuzzo, R. (2014). "The top 100 papers". Nature. 514 (7524): 550- ... The method combines the reactions of copper ions with the peptide bonds under alkaline conditions (the Biuret test) with the ...
A further effort to prepare a colorless biuret reagent. Biochemical Bulletin (New York), 2, 556-8. Thomas, A. W. (1914). A ...
Biuret can be viewed as the amide of allophanic acid. The compound can be prepared by treating urea with sodium bicarbonate: ...
Urea Biuret Cyanuric acid International Union of Pure and Applied Chemistry (2014). Nomenclature of Organic Chemistry: IUPAC ...
He also worked in the field of amino acids and the Biuret reagent. Born in Frankfurt am Main, Schiff was a student of Friedrich ...
... is also used in the Biuret reagent to test for proteins. Copper sulfate is used to test blood for anemia. ...
And he obtained a patent for the use of biuret for animal feed (Kamlet, 1956). Dow Chemicals bought this patent from Kamlet ... and a synthesis of biuret that could be used as an element of fodder, along with hundreds of other patents. His wife, Edna ...
Reagent B 4% w/v CuSO4·5H2O The BCA Micro BCA assay is a 3-component protocol which uses concentrated stocks of the Biuret ... This proprietor chelator and presumed optimized Biuret reaction formulation allows the assay to provide rapid (. ... Bradford protein assay or biuret reagent. The total protein concentration is exhibited by a color change of the sample solution ...
Other more accurate spectrophotometric procedures for protein quantification include the Biuret, Lowry, BCA, and Bradford ...
HDI is also sold oligomerized as the trimer or biuret which are used in automotive refinish coatings. Although more viscous in ...
Franz Hofmeister made the proposal in the morning, based on his observations of the biuret reaction in proteins. Hofmeister was ...
Lowry assay is similar to biuret assays, but it uses Folin reagent which is more accurate for quantification. Folin reagent is ...
Therefore, the biuret test or the ninhydrin reaction are used along with it to confirm the presence of proteins. Benedict's ...
Since biuret has the formula NH2-CO-NH-CO-NH2, that suggested the presence of similar peptide bonds in proteins. primary ... Hofmeister also argued for peptide bonds based on the biuret reaction observed with all proteins but never with free amino ...
... is used to analyze to monitor cuprous ion presence due to its purple coloration via a biuret reaction. In ...
... can be synthesized by the pyrolysis of urea or the condensation reaction among 2 moles of dicyandiamide and 1 mole of biuret. 2 ...
The traditional method for measuring total protein uses the biuret reagent, but other chemical methods such as dye-binding and ...
It is a common precipitant in protein crystallography and is also an ingredient in the Biuret reagent which is used to measure ...
Biuret Test Solution, 100 mL. Flinn Lab Chemicals, Your Safer Source for Science ...
How is Biuret reagent prepared. What are the results of Biuret test. ... Find out about Biuret test. What is it used for. What are its theory, principle & procedure. ... Definition: What is Biuret Test?. Biuret test is a chemical test used to determine the presence of peptide bond in a substance ... Importance of the Biuret Reaction. Biuret test is important mainly because it can detect the amount of protein in urine. Excess ...
Determination of biuret content of urea-based fertilizers - HPLC method ... ISO 18643:2016 specifies the test procedure for determination of the biuret content in liquid and solid urea-based fertilizers ... Fertilizers and soil conditioners - Determination of biuret content of urea-based fertilizers - HPLC method. ...
Protein, ≥15% biuret condição de armazenamento. (Keep container tightly closed in a dry and well-ventilated place.) ...
Examples of widely used polyisocyanates include HDI biuret and HDI isocyanurate. ...
... with a median of 129 microg biuret/pair and maximum of 60.8 mg biuret/pair. The most frequently used PPEs in the workplace were ... Results: Breathing zone concentrations were the highest for biuret (median, 18.4 microg/m3), followed by 1,6-HDI monomer ( ... 8,240 microg/m3 biuret; and 947 microg/m3 1,6-HDI. Twenty percent of samples were above the NIOSH ceiling exposure limit for 1, ... biuret, isocyanurate and uretdione) were measured among 30 workers performing painting of bridges and other metal structures in ...
Biuret Solution. Hydrochloric Acid Solution. Sodium Hydroxide Solution. Starch. Glucose. Protein. Lipase. Pepsin. Teachers ...
Albumin-based or albumin-linked calibrators cause a positive bias in serum protein analysis by the biuret method CHROMÝ ...
The total protein method utilizes the biuret reaction with measurement of the final product at 546 nm. Divalent copper reacts ... in alkaline solution with protein peptide bonds to form the characteristic purple-colored biuret complex. Sodium potassium ...
Protein assay was done by the biuret method. The permissible level for organic and bioburden residuals is less than 6.4 µg/mL ...
Serum and plasma analysis: The serum total protein concentration was determined using Biuret reagent as described by King and ...
Dissolved urea question - does it have to be feed-grade? Well, no, but do watch the biuret levels (it can burn if the levels ...
The most significant finding was a low plasma and serum protein both on refractometry and using the biuret method of analysis. ...
The experiment is conducted by laboratory method (Biuret Test) and using spectrophotometer to analyze the absorbance of ...
Different side products such as biuret, nitrate, cyanuric acid, ammelide, and others were formed. In the anodic compartment, ...
These results were compared by use of Bland-Altman plots with those obtained from a commercial laboratory that used a biuret ...
Biuret method) and albumin (BCG method) (Hitachi automated analyzer, Model 7150); sodium and potassium (flame photometry: ...
This substance was isolated as electrophoretically single compound, positive to the Molish reaction, negative to the biuret ...
Formation of 5-azauridine, ribosyl N-formylbiuret, ribosyl biuret, and their 5-phosphates in Escherichia coli culture from 5- ... Formation of the ribonucleoside of 5-azauracil by Escherichia coli and isolation of ribosyl biuret as the main decomposition ... Antagonism of N-substituted biuret derivatives and nucleic acid pyrimidine precursors. 1964, Vol. 29, Issue 5, pp. 1322-1325 [ ...
Biuret Reagent - 500ml STS Supplies. CSA0726-M. €12.29 Login to add to cart. ...
5. PHOTOMETRIC DETERMINATION OF BIURET IN MELTED UREA USING FLOW INJECTION ANALYSIS. ...
"Daily and alternate-day supplementation of urea or biuret to ruminants consuming low-quality forage: III. Effects on ruminal ...
Today we are going to do the determination of Plasma Protein by Biuret Method. Before we move on to the test, we will need to ... Determination of Plasma Protein by Biuret Method. November 16, 2016. by Admin Leave a Comment ... tell you about Biuret method. The presence of peptide bonds and other things such as Plasma Proteins can be checked with the ...
Sell Ion Exchange Resin Styrax Benzoin CAS NO 119-53-9 Minyak Esensial Benzoin at a price of Rp 53000.00 from Mitra Tsalasa Jaya
Biuret. %. -. 0.3. Alkalinity as NH3. %. -. 0.26. Aldehydes. mg/kg. -. 2. Insoluble. mg/kg. -. 10. ...
Biuret test:. This test is used for detecting the presence of proteins in a solution. When there are proteins present, the ... If Biuret cant be used, Fehlings Solutions A and B and Sodium hydroxide and copper (II) sulphate solutions can be used. ... The Biuret reagent has both KOH (potassium hydroxide) and CuSOâ‚„ (copper sulfate). The solutions pH is raised to an alkaline ... Starch showed no different changes than water with the Sudan III and Biuret test, thus we assume it to be negative. While with ...
Nitrogen from urea formaldehyde (4) If the biuret content is less than 0,2 %, the words low in biuret may be added ...
Native human calprotectin is a complex of the proteins S100A8 and S100A9, a suitable biomarker for local or systemic inflammation. Read more!
  • 13. Gornall AG, Bardawill CJ, David MM. Determination of serumproteins by means of the biuret reagent. (bvsalud.org)
  • The most significant finding was a low plasma and serum protein both on refractometry and using the biuret method of analysis. (vin.com)
  • Today we are going to do the determination of Plasma Protein by Biuret Method. (allmedtests.com)
  • Examples of widely used polyisocyanates include HDI biuret and HDI isocyanurate. (cdc.gov)
  • Methods: Exposures to aliphatic isocyanate s based on 1,6-hexamethylene diisocyanate (1,6-HDI) and its higher oligomers (biuret, isocyanurate and uretdione) were measured among 30 workers performing painting of bridges and other metal structures in several construction sites in the Northeastern USA. (cdc.gov)
  • Results: Breathing zone concentrations were the highest for biuret (median, 18.4 microg/m3), followed by 1,6-HDI monomer (median, 3.5 microg/m3), isocyanurate (median, 3.4 microg/m3) and uretdione (median, 1.7 microg/m3). (cdc.gov)
  • These results were compared by use of Bland-Altman plots with those obtained from a commercial laboratory that used a biuret method for TP concentration and electrophoresis for albumin concentration. (avma.org)
  • Before we move on to the test, we will need to tell you about Biuret method. (allmedtests.com)
  • The presence of proteins in a substance can be detected using a test called the Biuret test. (chemistrylearner.com)
  • 2) Learn about the various food tests - namely the iodine test, Benedict's test, Biuret test and emulsion test. (nus.edu.sg)
  • All, her characteristic biuret reaction hardly an indurated other lung appears in our patients. (biosferatajotejointernacional.org)
  • Other methods for the analysis of collagenous preparations were as follows: total protein by quantitative biuret reaction (7), hexosamine by the Elson-Morgan reaction (8)) amino acids by the method of Moore and Stein (9) after hydrolysis for 48 hr. with 6 N HCl in a sealed tube at 105'C. (coek.info)
  • In strongly alkaline solution biuret gives a violet color with copper sulfate. (nih.gov)
  • Isocyanate loading on the gloves was generally high, with a median of 129 microg biuret/pair and maximum of 60.8 mg biuret/pair. (cdc.gov)