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    Search term:"ultraviolet_visible_spectroscopy"

    30 matches found for ultraviolet_visible_spectroscopy

    Enhanced Separation Capability in SIC using a Fused-Core® Column

    Enhanced Separation Capability in Sequential Injection Chromatography using an Ascentis® Express Column Based on Fused-Core® Particle Technology The following was generated with the assistance of an outside source using Sigma-Aldrich products. Technical content was generated and provided by: Petr Ch...

    siRNA Frequently Asked Questions for General siRNA Use

    What is siRNA? What is the molecular weight of my siRNA? What are the recommended storage conditions for siRNA duplexes? How long are siRNA’s Stable? How many times can I freeze and thaw reconstituted siRNAs? What level of purification do I need for my siRNAs? Do you offer GMP siRNA? How does Sigma ...

    Boron Nitride Nanotubes: Properties, Synthesis and Applications

    Products • Nanopowders and Nanoparticle Dispersions • Carbon Nanotubes Related Links • Carbon Nanomaterials: Elemental Analyses and Quantification of Their Accumulation in Living Cells • CoMoCAT® Single-wall Carbon Nanotubes • Carbon Nanofiber Applications & Properties • Single, Double, MultiWall Ca...

    Gold Nanoparticles: Properties and Applications

    Related Products • Gold Nanoparticles • Silver Nanoparticles • Nanomaterials • Specialty Polymers and Nanomaterials for Drug Delivery Related Articles • Gold Nanostructures • Silver Nanoparticles: Properties and Applications • Silver Nanomaterials: Properties & Applications • Silica Coated Gold Nano...

    Sensitive Determination of Iron in Drinking Water, Mineral Water, Groundwater, and Spring Water Using Rapid Photometric Tests

    The quality of drinking water is regulated by a variety of guidelines, such as the EU Council Directive 98/831,2 and WHO guideline.3 The key principles used to define these limits consider both health hazards and sensory and technical reasons. Iron, for example, does not exhibit a risk for health in...

    Quantum Dots for Electronics and Energy Applications

    What are Quantum Dots? Perovskite Quantum Dots PbS Quantum Dots Quantum Dot Applications Light Emitting Diodes (LEDs) Lighting Solar Cells Photodectors Biomedical Imaging Quantum dots (QDs) are nanometer sized (~2-10 nm) semiconducting material. Owing to their small size, QDs exhibit quantum confine...

    New Conducting and Semiconducting Polymers for Plastic Electronics

    Related eTool • OLED eFabricator • • Download PDF • TDA Research, Inc. In the emerging field of organic printable electronics, such as OLEDs and organic photovoltaics (OPVs), there is a significant need for improved organic conducting and semiconducting materials. This paper reports our recent progr...

    Analytical Characterization / Certifications

    Cerilliant operates a state-of-the-art analytical laboratory providing custom services to its clients including: characterization and certification of client materials, material stability studies, analytical method development, and impurity and structure elucidation studies. Our expertise spans a wi...

    Single Walled Carbon Nanotubes

    Richard Jansen and Philip Wallis* SouthWest NanoTechnologies, Inc. 2501 Technology Place Norman, OK 73071 *Email: pwallis@swentnano.com Carbon nanotubes are materials that possess remarkable properties and offer extraordinary possibilities. This article gives a brief overview of the physico-chemical...

    Clean-up of Antibody Labeling Reactions Using Amicon® Ultra Filters

    Using a standard Amicon® Ultra centrifugal filter, a few rounds of diafiltration can efficiently remove unincorporated label from an antibody labeling reaction without diluting the sample. Use the protocol below to remove unreacted fluorescent labels using centrifugal ultrafiltration devices. Remova...

    Sample Purification & Quality Assessment - PCR Technologies Guide

    • Introduction and Historical Timelines • Polymerase Chain Reaction • Quantitative PCR • Digital PCR • Quantitative PCR and Digital PCR Detection Methods • PCR qPCR dPCR Assay Design • Sample Purification and Quality Assessment • Reverse Transcription • Assay Optimization and Validation • Data Analy...

    Melting Temperatures of Oligonucleotides

    The melting temperature (Tm) of an oligonucleotide is the temperature at which 50% of the oligonucleotide is duplexed with its perfect complement and 50% is free in solution. Awareness of the Tm is critically important for numerous techniques in molecular biology, e.g. PCR, Southern blotting, in sit...

    Optoelectronic Devices Based on Diketopyrrolopyrrole (DPP)-containing Conjugated Small Molecules

    Jianhua Liu and Thuc-Quyen Nguyen* Center for Polymers and Organic Solids Department of Chemistry & Biochemistry University of California, Santa Barbara, California 93106, United States *Email: quyen@chem.ucsb.edu Optoelectronic devices such as light-emitting diodes (LEDs), solar cells, and light-em...

    Universal Platform for Surface Modification Employing Grafted Polymer Layers

    • • Download PDF • Bogdan Zdyrko,1 Viktor Klep1 and Igor Luzinov*1,2 1School of Materials Science and Engineering, and 2Center for Optical Materials Science and Engineering Technologies, Clemson University, Clemson, SC 29634 E-mail: luzinov@clemson.edu Ultrathin (end-) grafted polymer layers are wel...

    Cosmetics & Personal Care

    All great cosmetic actives and products start with safe, reliable and compliant ingredients. Whether you are a perfumer looking for fragrance ingredients that follow the IFRA guidelines or a cosmetic formulator looking for hard to find ingredients or innovative products like our Strat-M® membrane sk...

    cGMP Manufacturing – SAFC - Buchs

    SAFC Buchs, Switzerland specializes in complex, multi-step, organic custom synthesis of intermediates and raw materials from Phase I to Phase III clinical trials. This cGMP, ISO certified site provides a wide range of development and production capabilities, including Simulated Moving Bed (SMB) chro...

    CoMoCAT® Single-wall Carbon Nanotubes

    Related Products • Carbon Nanomaterials • Graphene Technologies • Nanomaterials Resources Related Articles • Carbon Nanomaterials: Elemental Analyses and Quantification of Their Accumulation in Living Cells • Boron Nitride Nanotubes: Properties, Synthesis and Applications • Novel Properties and Appl...

    Water for Spectrophotometry

    Many molecules absorb in the ultraviolet (UV) and visible (Vis) range of the electromagnetic spectrum. UV radiation covers the range from 190-350 nm, while visible radiation covers the 350-800 nm range. The absorption of radiation corresponds to the excitation of outer electrons in the molecule. In ...

    Glycine Hydrochloride for Cell Culture

    • • Download PDF • PharmaGrade, manufactured under appropriate controls for use as a raw material in pharma or biopharmaceutical production. Suitable for cell culture. • Product Regulatory Datasheet • Cherokee Buffers Quality Overview • Cherokee Buffers Site and Supply Chain Security Overview 1. Gen...

    Oligonucleotide FAQ (Frequently Asked Questions)

    Our customer service representatives and technical service scientists are more than happy to answer any questions that you may have regarding oligonucleotides. However, you may find the answer you need here. Designs Do you offer design assistance? Yes, you can perform real-time PCR / qPCR designs us...

    Manufacturing, Characterization and Use of Single Walled Carbon Nanotubes

    • • Download PDF • SouthWest NanoTechnologies, Inc. 2501 Technology Place Norman, OK 73071 *Email: pwallis@swentnano.com Carbon nanotubes are materials that possess remarkable properties and offer extraordinary possibilities. This article gives a brief overview of the physico-chemical nature and cha...

    Development of Organic Semiconductors from Highly Ordered Oligo and Polythiophenes

    Nicholas S. Colella, Lei Zhang, Alejandro L. Briseño* Polymer Science & Engineering Department, University of Massachusetts, Amherst, Massachusetts 01003 *Email: abriseno@mail.pse.umass.edu The soaring global demand for energy, coupled with the limited supply of fossil fuels, has increased the need ...

    A Fluorescence Derivatization Reagent for the Liquid Chromatographic Determination of Airborne Isocyanates

    Hartmut Henneken, Uwe Karst and Martin Vogel m.vogel@utwente.nl ......... Faculty of Science and Technology and MESA+ Institute for Nanotechnology, University of Twente, Enschede, The Netherlands. Currently, mono- and diisocyanates are widely applied for the industrial production of pharmaceuticals,...

    Ultra-High Efficiency Perovskite-Perovskite Tandem Solar Cells

    Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, Colorado 80401, USA *Email: Kai.Zhu@nrel.gov Next generation solar cells have the potential to achieve conversion efficiencies beyond the Shockley-Queisser (S-Q) limit while also significantly lowering production costs. ...

    Direct Detect® Infrared Spectrometer for Total Protein Quantitation

    How to use infrared spectroscopy to measure total protein concentration consistently (from one experiment to the next) and without knowing the sequence of the protein(s) being measured Accurately and consistently measuring the total protein concentration in a sample can generate more reliable immuno...

    Rapid Separation of Anthocyanins and Flavonol Glycosides Utilising Discovery® DSC-MCAX Solid Phase Extraction

    • • Download PDF • Contributed Article Rockhurst University, Kansas City, MO, USA Introduction Flavonols and anthocyanins are water-soluble vacuolar fl avonoid compounds that are synthesized by organisms of the plant kingdom. Flavonoids are widely distributed in plants fulfi lling many functions inc...

    Test Kits and Photometric Methods Webinars

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    Reactive Silver Inks for High-Performance Printed Electronics

    S. Brett Walker,1,2 Bok Yeop Ahn,3* Jennifer A. Lewis1,3,4 1Materials Science and Engineering Department University of Illinois at Urbana-Champaign, Urbana, IL 61801 2Electroninks Incorporated, Champaign, IL 61820 3Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, ...

    Graphene Quantum Dots: Properties, Synthesis & Applications

    Colloidal semiconductor quantum dots (QDs) have numerous potential applications in solar cells, light emitting diodes, bioimaging, electronic displays, and other optoelectronic devices due to their unique size-dependent electro-optical properties, and have thus been of significant research interest....

    An Alternative to the USP and EP Methods for the Analysis of Riboflavin (Vitamin B2)

    Related Articles • Reporter US Volume 33.3 (4 Mb PDF) • UHPLC Analysis of Taxanes Using A Titan C18 Column and UV Detection • LC-MS Analysis of Vitamin D Metabolites • HPLC Separation of Nine Key Silymarin Components of Milk Thistle Using a Titan™ C18 Column with LC/MS/MS Detection An alternative to...