N-(Propargyl-PEG2)-PEG3-t-butyl ester is a branched PEG linker with an alkyne group and a t-butyl ester. The alkyne group reacts with azide-bearing compound in coppper catalyzed azide-alkyne Click Chemistry reaction. The amino group is reactive with carboxylic acids, activated NHS esters, and carbonyls. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
N-(Propargyl-PEG2)-PEG3-t-butyl ester is a branched PEG linker with an alkyne group and a t-butyl ester. The alkyne group reacts with azide-bearing compound in coppper catalyzed azide-alkyne Click Chemistry reaction. The amino group is reactive with carboxylic acids, activated NHS esters, and carbonyls. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
K-LACGAR
SKU: 700004307
115 assays per kit
| Content: | 115 assays per kit |
| 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: | D-Galactose, Lactose |
| Assay Format: | Spectrophotometer |
| Detection Method: | Absorbance |
| Wavelength (nm): | 340 |
| Signal Response: | Increase |
| Linear Range: | 4 to 80 µg of D-galactose (or 8 to 160 µg of lactose) per assay |
| Limit of Detection: | 2.96 mg/L |
| Reaction Time (min): | ~ 15 min |
| Application examples: | Milk, dairy products (e.g. cream, milk / whey powder, cheese, condensed milk and yogurt), foods containing milk (e.g. dietetic foods, bakery products, baby food, chocolate, sweets and ice-cream), food additives, feed, cosmetics, pharmaceuticals and other materials (e.g. biological cultures, samples, etc.). |
| Method recognition: | Methods based on this principle have been accepted by AOAC Method 2006.06, NBN, DIN, GOST and IDF |
The Lactose/Galactose (Rapid) test kit is used for the rapid test of lactose, D-galactose and L-arabinose in food and plant products. Galactose dehydrogenase can be used the measurement and analysis of both D-galactose and L-arabinose. Suitable for the analysis of lactose in “low-lactose” or “lactose-free” samples which contain high levels of monosaccharides. The reagents provided in this kit are also suitable for use with AOAC method 2006.06 – Lactose in milk.
Note for Content: The number of manual tests per kit can be doubled if all volumes are halved. This can be readily accommodated using the MegaQuantTM Wave Spectrophotometer (D-MQWAVE).
View our full range of mono/disaccharide test kits.
Advantages
The Lactose/Galactose (Rapid) test kit is used for the rapid test of lactose, D-galactose and L-arabinose in food and plant products. Galactose dehydrogenase can be used the measurement and analysis of both D-galactose and L-arabinose. Suitable for the analysis of lactose in “low-lactose” or “lactose-free” samples which contain high levels of monosaccharides. The reagents provided in this kit are also suitable for use with AOAC method 2006.06 – Lactose in milk.
Usages:
For isolation and enumeration of coagulase-positive staphylococci in foodstuffs.
Principle:
Tryptone, beef extract powder and yeast extract powder provides carbon and nitrogen sources, vitamins and growth factors; sodium pyruvate and glycine to stimulate the growth of Staphylococcus aureus; lithium chloride and potassium tellurite inhibit the non-staphylococcal microorganisms; containing lecithinase staphylococcal colonies produce degradation yolk make transparent circle, while the role of the lipase produced an opaque precipitate ring; coagulase-positive staphylococci can restore potassium tellurite and produce black colonies; agar is medium coagulant.
Formulation（per liter）:
Pancreatic Digest of Casein 10g
Beef Extract 5g
Yeast Extract 1g
Sodium Pyruvate 10g
Glycine 12g
Lithium Chloride 5g
Agar 20g
Final pH7.0 ± 0.2
How to use：
1.Suspend 63g in 950ML of distilled water , stirring heated to boiling ,autoclave at 121℃ for 15 minutes.
2.Diluted and treated samples.
Quality control：
| Item | The name and number of strain | Growth | Colony Color |
| 1 | Staphylococcus aureus ATCC6538 | Good | black |
| 2 | Staphylococcus epidermidis CMCC (B) 26069 | Good | Green-blue |
| 3 | Escherichia coli ATCC25922 | Not growth | — |
Storage: Keep container tightly closed, store in a cool, dry place, away from bright light. Storage period of 3 years.
Specifications: 250g/bottle
*Supplement: 029190 Egg Yolk Tellurite Emulsion
250g
DADPS (dialkoxydiphenylsilane) Biotin Alkyne probes eliminate a major limitation of the streptavidin-biotin affinity purification. This reagent contains a biotin moiety and an azide reactive moiety. DADPS probe can be used in biomolecular labeling and proteomic studies. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
DADPS (dialkoxydiphenylsilane) Biotin Alkyne probes eliminate a major limitation of the streptavidin-biotin affinity purification. This reagent contains a biotin moiety and an azide reactive moiety. DADPS probe can be used in biomolecular labeling and proteomic studies. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
