Intended Use
For the isolation and differentiation of sorbitol-negative Escherichia coli serotype O157 from food and animal feed and other materials
Principle and Interpretation
Enzymatic digest of casein and enzymatic digest of animal tissue provides nitrogen source, vitamins and growth factors; sodium chloride maintains balanced osmoticpressure; sorbitol is a fermentable sugar; No. 3 bile salt and crystal violet inhibit Gram-positive bacteria, potassiumtellurite inhibits non-o157 Escherichia coli, and cefixime inhibits Proteus; neutral red is a pH indicator; and agar is the coagulant of the culture medium.
Formulation
Ingredients | /liter |
Enzymatic digest of casein | 17.0g |
Enzymatic digest of animal tissue | 3.0g |
Sorbitol | 10.0g |
Bile salt No.3 | 1.5g |
Sodium chloride | 5.0g |
Neutral red | 0.03g |
Crystal violet | 0.001g |
Agar | 15.0g |
pH 7.1±0.2 at 25°C |
Preparation
Weigh 51.5g of this product, add 1L of distilled water or deionized water, stir, heat and boil until completely dissolved, dispense into Erlenmeyer flasks, and sterilize at 121℃ for 15min. Melt the sterilized culture medium and cool it to about 45℃, add 1 tube of supporting reagent (SR0240) (0.25mg potassium tellurite and 0.005mg Cefixime) to every 100mL of basal culture medium, mix and pour into the plate.
Quality Control
Cultural characteristics observed after incubation at 35-37°C for 18-24hours
Quality control strains | Growth | Colony color |
Escherichia coli ATCC25922 | PR≥0.7 | pale pink to red |
Escherichia coli 0157:H7 NCTC12900 | PR≥0.7 | colorless |
Staphylococcus aureus ATCC 25923 | Total inhibition | – |
Sorage and Shelf Life
Keep container tightly closed, store in a cool, dry place, away from bright light. Storage period of 3 years.
Precautions
1. When weighing the dehydrated medium, please wear masks to avoid causing respiratory system discomfort
2. Keep container tightly closed after using to prevent clumping.
Waste Disposal
Microbiological contamination was disposed by autoclaving at 121°C for 30 minutes.
Intended Use For the isolation and differentiation of sorbitol-negative Escherichia coli serotype O157 from food and animal feed and other materials Principle and Interpretation Enzymatic ……
Norgen’s EXTRAClean Urine Exosome Purification and RNA Isolation Mini Kit constitutes an all-in-one system for the purification of exosomes and the subsequent isolation of RNA from different urine sample volumes ranging from 250 μL to 1 mL. The purification is based on spin column chromatography that employs Norgen’s proprietary resin. The EXTRAClean columns undergo stringent processing and rigorous quality control measures to minimize contamination traces, ensuring optimal results for sensitive applications such as NGS. The kit is designed to isolate all sizes of RNA, including microRNA. The kit provides a clear advantage over other available kits in that it does not require any special instrumentation, protein precipitation reagents, extension tubes, phenol/chloroform or protease treatments. Moreover, the kit allows the user to elute into a flexible elution volume ranging from 50 μL to 100 μL. The purified RNA is free from any protein-bound circulating RNA and of the highest integrity. The purified RNA can be used in a number of downstream applications including real time PCR, reverse transcription PCR, NGS application, Northern blotting, RNase protection and primer extension, and expression array assays.
Figure 1 / 9
Click for expanded view
Minimum Urine Input | 250 μL |
Maximum Urine Input | 1 mL |
Size of Exosomes Purified | 40 nm – 150 nm |
Size of RNA Purified | All sizes, including miRNA and small RNA (< 200 nt) |
Elution Volume | 50-100 μL |
Time to Complete 10 Purifications | 35-40 minutes |
Average Yields | Variable depending on specimen |
Storage Conditions and Product Stability
All buffers should be kept tightly sealed and stored at room temperature. This kit is stable for 2 years after the date of shipment. It is recommended to warm Lysis Buffer A for 20 minutes at 60°C if any salt precipitation is observed.
K-ARGA
SKU: 700004264
115 assays (manual) / 1150 assays (microplate) / 1150 assays (auto-analyser)
Content: | 115 assays (manual) / 1150 assays (microplate) / 1150 assays (auto-analyser) |
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: | L-Arabinose, D-Galactose |
Assay Format: | Spectrophotometer, Microplate, Auto-analyser |
Detection Method: | Absorbance |
Wavelength (nm): | 340 |
Signal Response: | Increase |
Linear Range: | 4 to 80 μg of L-arabinose or D-galactose per assay |
Limit of Detection: | 0.58 mg/L (L-arabinose), 0.69 mg/L (D-galactose) |
Reaction Time (min): | ~ 12 min (L-arabinose), ~ 6 min (D-galactose) |
Application examples: | Analysis of hydrolysates of oligo- and polysaccharides (e.g. arabinan, arabinoxylan, galactan, arabinogalactan), milk, dairy products, foods containing milk (e.g. dietetic foods, bakery products, baby food, chocolate, sweets and ice-cream), food additives (e.g. sweeteners), cosmetics, pharmaceuticals and other materials (e.g. biological cultures, samples, etc.). |
Method recognition: | Novel method |
The L-Arabinose/D-Galactose test kit is a simple, reliable and accurate UV method for the measurement and analysis of L-arabinose and/or D-galactose in various materials including foods, feeds, beverages and plant products.
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).
See more of our monosaccharide assay kits.
Advantages
The L-Arabinose/D-Galactose test kit is a simple, reliable and accurate UV method for the measurement and analysis of L-arabinose and/or D-galactose in various materials including foods, feeds, beverages and plant products.
83, On-nut 88/2 Prawet Sub-district, Prawet District, Bangkok, 10250, Thailand
Tel : 081-875-1869 , 02-328-7179
Email : hej@a3p-scientific.com
Copyright © 2024 A3P Scientific Co., Ltd. All rights reserved. Web by Mountain Studio
Privacy Policy | Terms of Use | Site Map