90-80-2

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Cell culture protocol for freezing cell lines at high cell viabilities using cryopreservation reagents such as DMSO. Cryopreservation is a method whereby cells are frozen, maintaining their viability, until they are defrosted months or years later. Free ECACC handbook download.

Faster Protein and Peptide Liquid Chromatography (FP2LC)

Larger porous shell particles with narrow particle size distribution, used in Supelco's BIOshell™ columns for the reversed-phase U/HPLC analysis of peptides and proteins, provide increased efficiency per unit pressure drop.

Analysis of Active Cannabis Compounds in Edible Food Products: Gummy Bears and Brownies

Potency testing in marijuana-infused edibles is an important problem that analytical labs are facing due to the complexity of the involved matrices. Concentration of active ingredients in these edibles can range from a few parts per million to 3.5 parts

Analysis of Pesticides in Turmeric Powder by LC/MS/MS and GC/MS/MS after Cleanup with Dual-Layer SPE Cartridge

Pesticide residue testing of turmeric and other (dried) spices is challenging due to their complex compositions and high matrix. An efficient SPE clean-up can be achieved by a new Dual-layer cartridge.

Isoprene Biosynthesis

Two metabolic pathways exist for the biosynthesis of isopentenyl pyrophosphate and dimethylallyl pyrophosphate: The mevalonate pathway, predominantly used by plants and in a few insect species. The non-mevalonate pathway or methyl D-erythritol 4-phosphate (MEP) pathway, which occurs in plant chloroplasts

Detection of GST-tagged Proteins with Western Blot

This page describes how to monitor expression and purification of GST-tagged proteins by Western blot analysis using Cytiva products.

Solvent Systems for Thin-layer Chromatography of Novabiochem Products

A guide to create solvent systems used for the thin-layer chromatography assay of Novabiochem products.

Applications of Percoll In Blood Cells

Data was compiled to assist the researcher in selecting references most likely to contain relevant information regarding use of Percoll for a particular cell or tissue type.

Particle Size Conversion Table

Particle size conversion table from our Lab Basics Technical Library

Applications of Percoll in Other Cell Types

The table was compiled to assist the researcher in selecting references most likely to contain relevant information regarding use of Percoll in various cell types.

Phosgene and Phosgene Substitutes

Phosgene is 170 times more reactive than TP, the main phosgene substitute. Therefore, reactions with phosgene can be carried out under much milder conditions than with TP. Compounds will react faster and at lower temperatures (often at -78°C), preserving sensitive

Endothelial Cell Tube Formation Angiogenesis Assay

Cell culture protocol: the endothelial tube formation assay to study angiogenesis using HUVECs and other endothelial cell types. Explore over 350 PromoCell products.

Ascentis® Express F5 (Pentafluorophenyl) U/HPLC Columns

Enhanced selectivity for stereoisomers and closely related compounds with alternate selectivity from C18 phases for basic, acidic, or neutral compounds

Removal of Percoll after Centrifugation

This page shows methods to remove Percoll from a sample after centrifugation.

Analysis of Pesticide Residues in Ginger Powder Using QuEChERS Extraction and Clean-up with a Novel Dual Layer SPE Cartridge

The odor and pungency of ginger is due to the presence of terpenes, gingerols and shogaols. These compounds contribute to the highly complex matrix of ginger, which subsequently presents a challenge in low level analyses of contaminants. A novel 2-layer

Nuclear Protein Extraction Without the Use of Detergent

Detergents can interfere with the labeling efficiency of the extracted proteins. Therefore, a procedure that does not include the use of detergents should be used for the preparation of nuclear proteins.

HighPrep™ PCR Clean Up Kit and Purification System Protocol

HighPrep™ PCR purification magnetic clean-up beads for manual and automated post-PCR, post-enzymatic reaction, NGS library clean-up.

Transmittance to Absorbance Table

Transmittance to absorbance table for fast conversion. Use this chart as a handy reference in the lab, classroom or field. The online transmittance chart is available to download and share.

AOAC Method 2011.11: UHPLC/MS/MS Analysis of Vitamin D2 and Vitamin D3 on Titan™ C18

Separation of Ergocalciferol (D2), analytical standard; Cholecalciferol (D3), analytical standard

Sample Preparation for Size Exclusion Chromatography

Samples for chromatographic purification should be clear and free from particulate matter. Simple steps to clarify a sample before beginning purification will avoid clogging the column, can reduce the need for stringent washing procedures, and can extend the life of

RNA Stabilization at Room Temperature in RNAstable®

Quantitative RT-PCR analysis demonstrates successful amplification of RNA templates that were stored dry in RNAstable® for 29 months at room temperature and under accelerated aging conditions equivalent to 12 years of room temperature storage.

radiello® Diffusive Air Sampling Application - Volatile Organic Compounds (VOCs) Chemically Desorbed With CS2

Flavors and Fragrances New Product Offerings

As a leading global supplier of new flavor and fragrance ingredients, we are dedicated to providing you with high-quality aroma chemicals comprising of certified food grade, IFRA, natural, kosher, and halal ingredients.

Enzymatic Assay of Cholesterol Oxidase

This procedure applies to products that have a specification for the enzymatic activity of cholesterol oxidase. This assay is NOT to be used to assay Cholesterol Oxidase from Schizophyllum commune (Discontinued Product Number C7274) and from Brevibacterium sp. (Discontinued Product

CryoStor® Cryopreservation Protocol

Cryopreservation efficacy which includes post-thaw recovery, viability, and functionality is of importance to both research and clinical applications. The cumulative stresses that result from the cryopreservation process and suboptimal freeze media result in cell death from necrosis and apoptosis.

Nucleases (DNases and RNases)

Nucleases, including high-purity DNase, RNase, and phosphodiesterase enzymes to support your nucleic acid digestion application needs.

Sample Preparation in Ion Exchange Chromatography

This page clarifies sample preparation, buffer exchange and desalting, removal of lipoproteins, phenol red, and low molecular weight contaminants in Ion exchange chromatography.

Thermal Transitions of Homopolymers: Glass Transition & Melting Point

Literature values for the glass transition temperature, (Tg), and melting temperature, (Tm), are given for the more common homopolymers.

Induced Pluripotent Stem Cell Reprogramming Protocols

Stem cell reprogramming protocols to generate human induced pluripotent stem cells (iPSCs) including viral and non-viral RNA based methods.

Imprint ® DNA Modification Kit (MOD50) Protocol

The Imprint DNA Modification Kit provides the reagents needed for bisulfite conversion and post-modification clean-up of DNA samples in less than 2 hours.

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