Introduction

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 ……

N-Boc-N-bis(PEG2-propargyl) enables Click Chemistry reactions with azide-bearing compounds or biomolecules via copper catalyzed Click Chemistry. The Boc-protected amine can be deprotected under acidic conditions. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.

N-Boc-N-bis(PEG2-propargyl) enables Click Chemistry reactions with azide-bearing compounds or biomolecules via copper catalyzed Click Chemistry. The Boc-protected amine can be deprotected under acidic conditions. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.

Introduction

Free-circulating nucleic acids, such as tumor-specific extracellular nucleic acid fragments and mRNAs in the blood or fetal nucleic acids in maternal blood, are present in serum or plasma usually as short fragments, <1000bp(Nucleic Acid). The HiPure Circulating Nucleic acid Micro Kit enables efficient purification of these circulating nucleic acids from human plasma, serum, or urine. Samples can be either fresh or frozen (provided that they have not been frozen and thawed more than once). Free-circulating cell-free DNA, RNA or viral nucleic acids are eluted in Nuclease Free Water, ready for use in amplification reactions or storage at -30 to -15°C. Purified nucleic acids are free of proteins, nucleases, and other impurities.

Details

Specifications

Features	Specifications
Main Functions	Isolation circulating DNA from 0.6ml plasma,serum, body fluids
Applications	qPCR, liquid or solid chip analysis, hybridization and SNP detection, etc.
Purification method	Mini spin column
Purification technology	Silica technology
Process method	Manual (centrifugation or vacuum)
Sample type	Serum, plasma and other cell-free fluid samples
Sample amount	0.6ml
Elution volume	≥30μl
Time per run	≤40 minutes
Liquid carrying volume per column	800μl
Binding yield of column	100μg

Principle

This product is based onsilica column purification. The sample is lysed and digested with lysate andprotease, DNA is released into the lysate. Transfer to an adsorption plate andfilter column. Nucleic acid is adsorbed on the membrane, while protein is notadsorbed and is removed with filtration. After washing proteins and otherimpurities, Nucleic acid was finally eluted with low-salt buffer.

Advantages

• High yield – most optimal process, free DNA (>50bp) can be obtained to the maximum extent
• High concentration – low elution volume, ensuring high nucleic acid concentration
• High purity – low alcohol binding method, completely removing inhibitor and protein pollution
• High recovery – DNA can be recoveredat the level of PG by silica gel column purification

Kit Contents

Contents	D318002	D318003
Purification Times	50 Preps	250 Preps
Buffer ACL	40 ml	200 ml
Buffer DCW1	22 ml	110 ml
Buffer DCW2*	20 ml	2 x 50 ml
Proteinase K	34 mg	180 mg
Protease Dissolve Buffer	1.8 ml	10 ml
Carrier RNA	110 μg	310 μg
Nuclease Free Water	10 ml	30 ml
HiPure CFDNA Mini Columns	50	250
2 ml Collection Tubes	100	5 x 100

Storage and Stability

Proteinase K, Carrier RNAshould be stored at 2-8°C upon arrival. However, short-term storage (up to 12weeks) at room temperature (15-25°C) does not affect their performance. Theremaining kit components can be stored dry at room temperature (15-25°C) andare stable for at least 18 months under these conditions. The entire kit can bestored at 2-8°C, but in this case buffers should be redissolved before use.Make sure that all buffers are at room temperature when used.

Free-circulating nucleic acids, such as tumor-specific extracellular nucleic acid fragments and mRNAs in the blood or fetal nucleic acids in maternal blood, are present in serum or plasma usually as short fragments,