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ARGET ATRP: Procedure for PMMA Polymer Brush Growth

Bocheng Zhu Steve Edmondson Department of Materials, Loughborough University, Loughborough, LE11 3TU, UK Surface preparation before polymer brush growth consists of two steps: surface cleaning and initiator monolayer deposition. There are many common techniques for rigorous surface cleaning; however...

Concentrations of Common Reagents Chart

Composition of concentrated reagent grade acids, ammonium hydroxide, and sodium and potassium hydroxide solutions (with dilution directions to prepare 1N solution) Chemical Name Molecular Formula Approx. Strength of Concd. Reagenta Molarity of Concd. Reagent Milliliters of Concd. Reagent Necessary t...

BRAND Dispensette S Bottletop Dispenser

The new bottle-top dispenser Dispensette® S: • New discharge tube with or without recirculation valve • New valve system, no sealing rings necessary • Faster priming due to improved flow technology • Less force needed during dispensing especially for instruments with large volumes • Volume selection...

ELISA Procedures

To search our entire portfolio of antibodies for your research needs, use our Antibody Explorer Tool. • Indirect ELISA • Capture ELISA • Troubleshooting Guide (PDF) • References • Reagents and Equipment • Procedure Reagents and Equipment 1. Phosphate buffered saline (PBS) tablet: 10 mM phosphate buf...

Technical Literature for Derivatization Reagents

General Literature & Books Handbook of Analytical Derivatization Reactions – D. Knapp Guide to Derivatization Reagents for Gas Chromatography (GC) Handbook of Derivatization reagents for HPLC (Book & CD) - Lunn & Hellwig Silylation Reagents BSA (PDF 107 KB) BSA + TMCS (PDF 108 KB) BSA + TMCS + TMSI ...

Alkylation and Esterfication Derivatization Reagent

Alkylation is the replacement of a active hydrogen in R-COOH, R OH, R-SH, and R-NH2 with an alkyl group or, sometimes aryl group. The gas chromatographic properties of compounds are enhanced because of the decreased polarity of the derivatives as compared with the parent compound. Esterification is ...

Tap into Safety

Most acids and bases used in lab applications and chemical production are highly corrosive, and pose severe health hazards. Using larger containers for higher volumes also increases the chance of accidents. Eliminate these risks with our new manual dispensing systems for acids and bases. Request Lit...

Preparing Self-Assembled Monolayers

Self-assembled monolayers (SAMs) of thiols are prepared by immersing a clean gold substrate into a dilute solution of the desired thiol. Figure 1. Schematic showing an ordered self-assembled monolayer of densely packed alkane thiols. Although self-assembly takes place rapidly, good experimental proc...

Acid and Base Chart

Use this acids and bases chart to find the relative strength of the most common acids and bases. This acid-base chart includes the Ka value for reference along with the chemical's formula and the acid’s conjugate base. The acid and base chart is a reference table designed to make determining the str...

Synonyms
Species Mouse (97122) , Species Rat (295277) , Species dog (448780)

Kjeldahl Method Standard

Michaela Buffler, Product Specialist Kjeldahl Solutions, Büchi Labortechnik AG, Meierseggstr. 40, CH-9230 Flawil, Switzerland buffler.m@buchi.com Nicole Amann, Product Manager Analytical Standards For almost 130 years the determination of nitrogen using the method developed by Danish chemist Johan G...

Assay Procedure for Invertase

The appearance of reducing sugars is measured by the modified Fehling-Lehmann-Schoorl method.7) One unit causes the formation of one milligram of reducing sugars equivalent to the glucose at 3 minutes under the conditions described below (This activity is equivalent to the international unit that hy...

A Step-by-Step Guide for Solution Based Self-Assembly

Material Matters 2006, 1.2, 18. Dr. Dan Graham, Assemblon; Dr. Sean Dingman, Sigma-Aldrich Self-assembled monolayers of thiols are prepared by immersion of a clean gold substrate into a dilute solution of the desired thiol. Although self-assembly takes place very quickly, good experimental procedure...

Sublimed Materials for Organic Electronic Devices

Related Products • Sublimed Materials • Organic Field Effect Transistor (OFET) Materials • Organic and Printed Electronics Related Articles • Soluble Pentacene Precursors • TIPS Pentacene: Dip Coating Procedure • Solution Processable Polytriarylamine Semiconductors • Organic Field Effect Transistors...

Alternative Energy Tutorial

Introduction Batteries Fuel Cells Conducting Polymers High-Purity Inorganics Liquid Electrolytes Plasticizers and Binders Solid Polymeric Electrolytes References Fuel cells and batteries are electrochemical cells used to generate an external electrical current. They consist of an anode, where oxidat...

Enzymatic Assay of Pectinase

To standardize a procedure for determining the enzymatic activity of Pectinase. This procedure applies to Sigma-Aldrich Product Numbers P4716, P0690, P2401, and P4300. 3.1 Purified Water = water from a deionizing system, resistivity > or = 18MΩ•cm @ 25ºC 3.2 Unit Definition = = One unit will liberat...

Enzymatic Assay of 5’-Nucleotidase

To standardize a procedure for determining the enzymatic activity of 5’-Nucleotidase. This procedure applies to all products that have a specification for 5’-Nucleotidase. This procedure is NOT to be used to assay 5’-Nucleotidase from bovine liver, Sigma-Aldrich Product Number N2779, or 5’-Nucleotid...

Working with BRAND® Liquid Handling Instruments

The ever increasing demands on the quality of analytical results, and the growing number of samples to be processed result in a need for volumetric instruments which help to handle the routine work in sample preparation as efficiently as possible. Manufacturers of laboratory equipment have responded...

Molarity Calculator & Normality Calculator for Acids & Bases

The molarity calculator tool provides lab-ready directions describing how to prepare an acid or base solution of specified Molarity (M) or Normality (N) from a concentrated acid or base solution. To prepare a solution from a solid reagent, please use the Mass Molarity Calculator. To dilute a solutio...

Negative Photoresist Procedure

Our photoresist kit was designed to have the necessary chemical components for each step in the lithographic process. The component materials are provided in pre-weighed quantities for your convenience. Etchants are available separately so that the proper etchant can be chosen for a variety of subst...

Tetrahydrofuran - High Purity Solvents

Tetrahydrofuran, THF, is a heterocyclic compound with oxygen. The molecular formula for THF is (CH2)4O. It is a colorless liquid. Heterocyclic compounds are cyclic hydrocarbons that contain an atom in the ring of a cyclic other than a carbon atom, hence the prefix "hetero". — These atoms could be su...

Synthesis and Applications of Graphene Nanoribbons Synthesized

1 Department of Chemistry, 2 Smalley-Curl Institute and The NanoCarbon Center, 3 Department of Materials Science and NanoEngineering, Rice University, 6100 Main Street MS 222, Houston, Texas 77005, USA *Email: tour@rice.edu Article Sections • Introduction • Top-Down Synthesis of GNRs from Unzipping ...

Determination of Organic Acids in Wine and Fruit Juices with Ion Exclusion Chromatography

Senior Scientist R&D Applications … ihayenga@europe.sial.com The measurement of organic acids in wines is complementary to sensorial and microbiological quality assessment in fermentation control, for example, because the types and concentrations of the different acids influence the resulting color ...

MXenes: A Tunable Family of 2D Carbides and Nitrides

Related Content • Synthesis and Applications of Graphene Nanoribbons Synthesized • Advancements in the Fabrication of Integrated Organic Electronics • Progress for High Performance Tandem Organic Solar Cells A. J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering, Dr...

Trace Analysis - Ion Chromatography

Certified Standard Solutions (TraceCERT®) • PRIMUS (Primary Multi-ion Standards) • Multi-ion Standards • Inorganic Anion Standards • Inorganic Cation Standards • Organic Anion Standards • Carbohydrate and Sugar Alkohol Standards Certified Eluent Concentrates • Single Concentrates • Binary Concentrat...

Single-Walled Carbon Nanohorn Properties & Applications

Categories • Carbon Nanomaterials • Carbon Nanotubes • Graphene Technology • Bioelectronics • Drug Delivery Introduction Large-scale production of SWCNHs Material properties of SWCNHs - As-grown SWCNHs - SWCNHs with holes (Holey-SWCNHs) Applications Materials References Single-walled carbon nanohorn...

Frequently Asked Questions

• General • Analytical • Chemistry • Life Science • Labware • Ordering • Shipping / Delivery • Documentation • Regulatory • Storage • Packaging / Labeling • Solubility / Stability Why are products discontinued and how can I find alternatives? Products are discontinued for a variety of reasons. It ma...

Protocols for Membrane Scaffold Proteins and Nanodisc Formation

The following material related to Nanodisc Technology is adapted from on-line content of the research group of Professor Stephen Sligar of the University of Illinois at Urbana-Champaign, with the kind permission of Professor Sligar. The concept of membrane scaffold proteins was originally derived fr...

Certified Reference Materials for Atomic absorption spectroscopy

TraceCERT® and Certipur® Productportfolio and Product Features AAS and ICP Single Element Standards (TraceCERT® and Certipur®) Titrisol® Concentrated Single-Element Standards for AAS Multielement Standards for ICP (TraceCERT® and Certipur®) TraceCERT® mixes for special applications • Mixes acc. to I...