Propargyl-PEG8-t-butyl ester is a PEG reagent with an alkyne group and a t-butyl group. The alkyne group enables the formation of triazole linkage with azide-bearing compounds or biomolecules; copper is required as a catalyst. The t-butyl group can be hydrolyzed under acidic conditions. The hydrophicility of the molecule is improved by having 8 units of PEG. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
Detail
Propargyl-PEG8-t-butyl ester is a PEG reagent with an alkyne group and a t-butyl group. The alkyne group enables the formation of triazole linkage with azide-bearing compounds or biomolecules; copper is required as a catalyst. The t-butyl group can be hydrolyzed under acidic conditions. The hydrophicility of the molecule is improved by having 8 units of PEG. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
Other Products
Total Dietary Fiber Assay Kit
Product Info
Document
Product Info
K-TDFR-200A
SKU: 700004347
Content:
100 assays / 200 assays
Shipping Temperature:
Ambient
Storage Temperature:
Short term stability: 2-8oC, Long term stability: See individual component labels
Stability:
> 2 years under recommended storage conditions
Analyte:
Dietary Fiber
Assay Format:
Enzymatic
Detection Method:
Gravimetric
Signal Response:
Increase
Limit of Detection:
0.5 g/100 g
Total Assay Time:
~ 100 min
Application examples:
Food ingredients, food products and other materials.
Method recognition:
AACC Method 32-05.01, AACC Method 32-06.01, AACC Method 32-07.01, AACC Method 32-21.01, AOAC Method 985.29, AOAC Method 991.42, AOAC Method 991.43, AOAC Method 993.19, CODEX Method Type I and GB Standard 5009.88-2014
The Total Dietary Fiber Assay Kit for the analysis of Total, Soluble and Insoluble Dietary Fiberaccording to AOAC and AACC approved methods.
Dietary fiber can generally be described as the carbohydrate content of food that is not digested in the human small intestine. It passes into the large intestine where it is partially or fully fermented. These characteristics of dietary fiber are associated with its numerous well documented health benefits.
Dietary Fiber is a mixture of complex organic substances, including hydrophilic compounds, such as soluble and insoluble polysaccharides and non-digestable oligosaccharides, as well as a range of non-swellable, more or less hydrophobic, compounds such as cutins, suberins and lignins. The procedures for the determination and analysis of total dietary fiber as outlined in our assay protocol are based on the methods of Lee et al.1 and Prosky et al.2,3 (AOAC 991.43, AOAC 985.29, AACC 32-07.01 and AACC 32-05.01). However, the enzymes in the Megazyme Total Dietary Fiber Kit can also be used in other dietary fiber analytical methods such as AACC Method 32-21.01 and AACC Method 32-06.01.
1. Association of Official Analytical Chemists. (1985). Official Methods of Analysis, 14th ed., 1st suppl. Secs. 43, A14-43, A20, p.399. 2. Association of Official Analytical Chemists. (1986). Changes in methods. J. Assoc. Off. Anal. Chem., 69, 370. 3. Association of Official Analytical Chemists. (1987). Changes in methods. J. Assoc. Off. Anal. Chem., 70, 393.
See General Referee Reports: Journal of AOAC INTERNATIONAL, Vol. 81, No. 1, 1998.
Two separate methods are described in the associated assay protocol:
METHOD 1: DETERMINATION OF TOTAL, SOLUBLE AND INSOLUBLE DIETARY FIBER Based on AOAC Method 991.43 “Total, Soluble, and Insoluble Dietary Fiber in Foods” (First Action 1991) and AACC Method 32-07.01 “Determination of Soluble, Insoluble, and Total Dietary Fiber in Foods and Food Products” (Final Approval 10-16-91).
METHOD 2: DETERMINATION OF TOTAL DIETARY FIBER Based on AACC method 32-05.01 and AOAC Method 985.29.
Note that a letter of endorsement from the original method developer, Dr. Leon Prosky, is included in the Documents Tab.
A reagent dispensing device which allows a full liter of constant reagent delivery
Permagen Reagent Trough Birdfeeder Kit with Bottle
The Permagen Reagent Trough Birdfeeder Cartridge and Bottle is a device to deliver 1 liter of reagent on the Biomek FX and NX Laboratory Automation Workstations. The unit fits on any standard ALP stand as well
Extended version or Standard available, extended designed to be refilled outside liquid handler, modification to machine may be necessary
Self-leveling fluid line assures the trough will have adequate volume
Hooks onto a Beckman® ALP stand or deck
ANSI/ SBS compliant footprint
Will stand up on bench to refill etc.
Available in white or black trough
Made in the USA
Pull down menu to choose product. Available in Extended version (black or white), standard version in white, or valve only
Please contact us for volume discounts, OEM opportunities, or private labeling.
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A reagent dispensing device which allows a full liter of constant reagent delivery