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 ……

Introduction

MagPure Circulating DNA Rich Kit designed for purification of high quality circulating DNA (cfDNA) from cell-free body fluids (such as plasma, serum). The purified DNA is suitable for direct use in downstream applications such as PCR, real-time PCR, biochip analysis and NGS.

Details

Specifications

Features	Specifications
Main Functions	Rich small fragment cfDNA from 0.6ml serum plasma, remove DNA fragments＞500bp
Applications	qPCR, NGS, etc.
Purification technology	Magnetic beads technology
Process method	Manual or automatic
Sample type	Serum, plasma
Sample amount	0.6ml
Elution volume
Time per run

Principle

This product is based on the purification method of high binding magnetic particles. The sample is lysedand digested under the action of lysate and Protease. DNA is released into the lysate. After adding magnetic particles and binding solution, Large DNA(>500bp) will be adsorbed on the surface of magBindparticles. After removal of large size, small size of DNA(<500bp) will be adsorbed on the surface ofMagPure Particle F and impurities such as proteins will be removed without adsorption. The adsorbedparticles were washed with washing solution to remove proteins and impurities, washed with ethanol toremove salts, and finally DNA

Advantages

• Economy – less than 50% of the price of Qiagen and other imported products
• Automatic – without labour

Kit Contents

Contents	1292750	12927200
Purification Times	50 preps	200 preps
MagPure Particles F	1.2 ml	4.5 ml
MagBind Particles	1.2 ml	4.5 ml
Proteinase K	24 mg	90 mg
Protease Dissolve Buffer	1.8 ml	10 ml
Buffer MLB	30 ml	120 ml
Buffer GDP	15 ml	60 ml
Buffer MAW1	40 ml	250 ml
Buffer MW2*	20 ml	50 ml
Elution Buffer	15 ml	60 ml

Storage and Stability

Proteinase K, MagBind Particles and MagPure Particles F should be stored at 2–8°C upon arrival. However, short-term storage (up to 12 weeks) at room temperature (15-25°C) does not affect their performance. The remaining kit components can be stored dry at room temperature (15-25°C) and are stable for at least 18 months under these conditions. The entire kit can be stored 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.

MagPure Circulating DNA Rich Kit designed for purification of high quality circulating DNA (cfDNA) from cell-free body fluids (such as plasma, serum). The purified DNA is suitable for direct use in downstream applications such as PCR, real-time PCR, biochip analysis and NGS.

Introduction

Free-circulating nucleic acids, such as tumor-specific extracellular DNA fragments and mRNAs in the blood or fetal nucleic acids in maternal blood, are present in serum or plasma usually as short fragments, <1000bp (DNA). HiPure Circulating DNA Midi Kit enables efficient purification of these circulating nucleic acids from human plasma, serum, or urine.

This product is for research use only.

Video

Details

Specifications

Features	Specifications
Main Functions	Isolation circulating DNA from 1-5ml plasma, serum, body fluids using vacuum protocol
Applications	qPCR, liquid or solid chip analysis, hybridization and SNP detection, etc.
Purification method	Mini spin column
Purification technology	Silica technology
Process method	Manual (vacuum)
Sample type	Serum, plasma and other cell-free fluid samples
Sample amount	1-5ml
Elution volume	≥50μl
Time per run	≤60 minutes
Liquid carrying volume per column	4ml
Binding yield of column	1mg

Principle

This product is based on silica Column purification. The sample is lysed and digested with lysate and protease, DNA is released into the lysate. Transfer to an adsorption column. Nucleic acid is adsorbed on the membrane, while protein is not adsorbed and is removed with filtration. After washing proteins and other impurities, 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 recovered at thelevel of PG by silica gel column purification

Kit Contents

Contents	D318201C	D318202C
Purification Times	10	50
Buffer ACL	50 ml	250 ml
Buffer ACB*	60 ml	300 ml
Buffer DCW1*	4.4 ml	22 ml
Buffer DCW2*	5 ml	10 ml
Proteinase K	110 ml	540 mg
Protease Dissolve Buffer	10 ml	30 ml
Carrier RNA	110 μg	110 μg
Nuclease Free Water	10 ml	20 ml
HiPure CFDNA Mini Columns	10	50
2 ml Collection Tubes	20	100
Extender Tube	10	50
Vac-Connector	10	50

Storage and Stability

Proteinase K, Carrier RNA should be stored at 2-8°C upon arrival. However, short-term storage (up to 12 weeks) at room temperature (15-25°C) does not affect their performance. The remaining kit components can be stored dry at room temperature (15-25°C) and are stable for at least 18 months under these conditions. The entire kit can be stored 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.

Experiment Data

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