Introduction

Intended Use

For the selective separation and enumeration of enterococci in food and water.

Principle and Interpretation

Tryptone and peptone are the sources of nitrogen and essential growth factors. Yeast extract acts as well nitrogenous compounds and additionally the vitamin B12 complex. Sodium azide acts largely inhibits the growth of gram-negative bacteria while sparing enterococci, staphylococci and streptococci. Ox bile inhibits most gram positives but not enterococci. Enterococci hydrolyse esculin to esculetin and dextrose, which reacts with ferric citrate producing a brownish black precipitate around the colonies. Tolerance to bile and the ability to hydrolyze esculin is the traditional and reliable test for the identification of enterococci. (4). Sodium chloride maintains the osmotic balance of the medium and Agar is the solidifying agent.

Formulation

Preparation

Weigh 56.6g of dry powder of this product, add 1 L of distilled water or deionized water, stir, heat and boil until completely dissolved, and sterilize at 121℃ for 15 min.

Quality Control

Cultural characteristics observed after incubation at 35-37°C for 20-24hours.

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 selective separation and enumeration of enterococci in food and water. Principle and Interpretation Tryptone and peptone are the sources of nitrogen and essential grow……

Propargyl-PEG7-t-butyl ester comprises a propargyl group and a t-butyl protected carboxyl group. The propargyl group reacts with azide compounds via copper catalyzed Click Chemistry to form a stable triazole linkage. Under acidic conditions, the carboxyl group can be deprotected. The hydrophilic PEG units enhance solubility of the molecule in aqueous media. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.

Propargyl-PEG7-t-butyl ester comprises a propargyl group and a t-butyl protected carboxyl group. The propargyl group reacts with azide compounds via copper catalyzed Click Chemistry to form a stable triazole linkage. Under acidic conditions, the carboxyl group can be deprotected. The hydrophilic PEG units enhance solubility of the molecule in aqueous media. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.

Introduction

The Kit provides fast purification of high-quality RNA from whole blood, cells and tissues using silica-membrane spin columns with a binding capacity of 100μg RNA. There is no need for phenol / chloroform extractions and time-consuming steps such as CsCl gradient ultracentrifugation or isopropanol precipitation. The purified RNA can be used for applications such as RT-PCR, Northern blotting, poly A+ RNA (mRNA) purification, nuclease protection and in vitro translation.

Details

Specifications

Principle

The Kit simplifies isolation of RNA from blood with a fast spin-column procedure. Red blood cells are selectively lysed and white cells collected by centrifugation. White cells are then lysed using highly denaturing conditions which immediately inactivate RNases. After homogenization using the DNA spin column, the sample is applied to the RNA column. Total RNA binds to the membrane and contaminants are washed away, leaving pure RNA to be eluted in 30–100µl RNase-free water (provided with the kit) for direct use in any downstream application.

Advantages

• High quality – high purity total RNA can be directly used in various sensitive downstream applications
• Fast – isolation of several samples can be completed in 20 minutes by using column purification method
• Sensitive – RNA can be purified at the level of PG

Kit Contents

Storage and Stability

HiPure Blood RNA Mini Kit components can be stored dry at room temperature (15-25°C) and are stable for at least 18 months under these conditions. Make sure that all buffers are at room temperature when used. During shipment, crystals or precipitation may form in the RTL Lysis Buffer. Dissolve by warming buffer to 37°C.

The Kit provides fast purification of high-quality RNA from whole blood, cells and tissues using silica-membrane spin columns with a binding capacity of 100μg RNA. There is no need for phenol / chloroform extractions and time-consuming steps such as CsCl gradient ultracentrifugation or isopropanol precipitation. The purified RNA can be used for applications such as RT-PCR, Northern blotting, poly A+ RNA (mRNA) purification, nuclease protection and in vitro translation.