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Certified Reference Materials & Proficiency Testing in the 17025 laboratory

Traceable reference materials. RTC have been producing environmental laboratory Proficiency Testing programs and certified reference materials for more than 20 years. More than 20,000 PT samples a year are sent to over 2,500 worldwide participants analysing soil, sediments and both waste and drinking water. This webinar will focus on how Sigma-Aldrich-RTC can support your laboratory with its PT and CRM needs.
Recorded May 29 2012 47 mins
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Presented by
Peter Jenks, Reference Materials and PT Business Development Specialist
Presentation preview: Certified Reference Materials & Proficiency Testing in the 17025 laboratory

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  • 3D Nephrotoxicity applications & Nortis’ microfluidic organ-on-chip technology Jul 25 2017 3:00 pm UTC 120 mins
    Dr. Ed Kelly, Dr. Henning Mann
    1. The kidney proximal tubule is the primary site of drug-induced nephrotoxicity. I will describe the development of a 3-dimensional flow-directed proximal tubule microphysiological system (MPS). The kidney MPS recapitulates the synthetic, metabolic and transport activities of kidney proximal tubule cells. This MPS is as an ideal platform for ex vivo modeling of nephrotoxicity. Towards this goal, we have evaluated nephrotoxicity in response to challenge with multiple toxicants, including the heavy metal pollutant cadmium, antisense oligonucleotides, the antibiotic polymyxin B and the Chinese herbal product aristolochic acid. We believe that MPS technologies will have major impacts on predictive toxicity testing and human risk assessment. Animal and in vitro systems do not always faithfully recapitulate drug and xenobiotic responses in the clinic or occupational/environmental exposures, respectively. MPS technologies will refine safety assessment and reduce our need for surrogate animal testing. An ultimate goal is to create integrated human MPS organ systems that could replace animal models.

    2. Nortis has developed a technology that is used to recapitulate functional units of human organs in microfluidic devices (chips). Such organ models include vasculature, kidney, and liver models for toxicology studies, blood-brain barrier models for drug transport studies, and vascularized tumor microenvironment models for drug efficacy studies.
  • Developing Simplified Methods for Quantifying Analytes using SPME Jul 13 2017 1:30 pm UTC 90 mins
    Robert E. Shirey, M.S.; Principal R&D Scientist
    Solid phase microexatraction or SPME is a green method for extraction of analytes out of a sample. Since SPME is a non-exhaustive extraction technique, some analysts believe that SPME is not quantifiable. This presentation will provide basic information for developing a method to extract and quantify analytes using SPME. Examples will be given on the extraction and quantification of analytes out of various matrices, and SPME will be compared to other extraction techniques such as QuEChERS and SPE. In this webinar, we will discuss some new SPME technologies such as SPME-OC (over-coated) fibers and BioSPME that help to isolate and quantify analytes from interfering compounds in the matrix. Guidelines will be provided for enhancement of precision using SPME.
  • Advanced Cell Culture Technology for Generation of In Vivo-like Tissue Models Jun 30 2017 2:00 pm UTC 75 mins
    Stefan Przyborski, PhD - Professor of Cell Technology, Durham University UK
    The benefits of three dimensional (3D) cell culture are widely appreciated. More cell-based technologies are now becoming available that enable researchers to preserve the native 3D structure of cells in vitro. These can be broadly divided into three areas: aggregate-based methods; hydrogels and extra-cellular matrices; and inert scaffold-based technologies. Each has strengths and weaknesses and there is no one technology that satisfies all applications. Tissues in the body are mostly composed of different cell types that are often highly organized in relation to each other. Often cells are arranged in distinct layers that enable signalling and cell-to-cell interactions. Alternatively in tumours, cancer cells form aggregates and tissue masses composed of different cell types. Recreation of these types of architecture will significantly evolve 3D cell culture to a new level where real tissue-like structures can be generated in vitro.

    This webinar will review the alternative approaches available to researchers and provide an overview of their capabilities and example applications. More sophisticated models are developing as 3D cell culture technology becomes established and accepted as a means of creating more physiologically relevant cell-based assays. Methods that are relatively straightforward to use and that recreate the organized structure of real tissues will become valuable research tools for use in discovery, validation studies, and modelling disease.

    Key areas covered:
    • 2D vs 3D cell culture debate
    • Review of alternative approaches and the development of new technologies
    • Challenges facing 3D culture methods, in terms of technologies available and methods used
    • Showcase applications where 3D technology makes a difference
    • Future perspective for 3D cell culture technology and further development
  • Winning Westerns: Proven Strategies to Optimize Your Western Blots Recorded: Jun 21 2017 53 mins
    Natasha L. Pirman, Ph.D.
    Does western blotting give you more trouble than expected? Do you feel like your precious samples are being wasted on bad westerns? Join us and find out how you can improve your western blots! In this seminar, you will learn general guidelines for performing and troubleshooting your westerns, such as:

    • Choice of different blotting membranes
    • Parameters affecting blotting efficiency
    • Conditions for optimizing your immunodetection
    • Information on SNAP i.d.® 2.0 system: A faster way to perform immunodetection
  • Amplified Detection of Proteins and their Interactions using Duolink PLA Recorded: Jun 15 2017 44 mins
    Manpreet Mutneja, Ph.D, MBA Sr. Product Manager, Molecular Platforms Life Science Research, MilliporeSigma
    Understanding the movements, modifications and interactions of proteins within a cell is key to unraveling the fundamental tenets of biology. However, the low-level expression of many proteins, combined with the transient nature of their interactions and movements, makes analyzing and understanding these processes quite difficult. Duolink® PLA, which is based on the principles of the proximity ligation assay (PLA), offers a solution to overcome these hurdles and to study the actions of endogenous proteins within cells and tissues. Combining the specificity of antibodies with the sensitivity afforded by rolling circle amplification, Duolink® PLA allows you to detect, visualize, and quantitate proteins and their interactions (even single events) where they happen within cells or tissue, all without overexpression or genetic manipulation. This seminar will cover the basic assay principle and advantages of the Duolink® PLA technology, and discuss recent applications and developments of the technology that make it an excellent tool to understand the fundamental mechanisms of biology, as well as disease states. Applications of Duolink® PLA include the investigation of cellular responses to varying stimuli, receptor dimerization and signalling cascades, post-translational modifications, and regulation of protein expression. New developments include use in flow cytometry and multiplexed detection.
  • Basic Principles of Solid Phase Microextraction (SPME) Method Development Recorded: May 31 2017 74 mins
    Emanuela Gionfriddo, Ph.D.; Research Associate under Prof. Janusz Pawliszyn, University of Waterloo (ON, Canada)
    For the past two decades, Solid Phase Microextraction (SPME) has represented a convenient alternative to conventional sample prep procedures. SPME allows the simultaneous extraction and enrichment of analytes of interest from a given matrix in a single step while avoiding, or drastically minimizing, the use of organic solvents and time-consuming cleanup procedures.
    Like any other analytical method, the various parameters governing the SPME process need to be carefully optimized in order to achieve robustness and sensitivity. However, certain aspects of SPME method development are often overlooked by many users, leading to unsatisfactory performance of the technique.
    This webinar will shed light into several aspects of SPME method development. The presentation will include a theoretical explanation of SPME fundamentals and practical suggestions to overcome common errors and bias encountered when using SPME.
    The webinar is divided in three main sections: 1) optimization of extraction conditions 2) matrix modifications 3) optimization of desorption conditions for gas and liquid chromatography. Each section is divided in various subsections dedicated to each parameter affecting the performance of the SPME technique. The webinar attendees will be guided through comprehensive understanding of the technology and the critical parameters that influence the extraction process with practical examples from already existing methods.
  • Lung Cancer and IHC Recorded: May 12 2017 67 mins
    Jeff Gordon, Cell Marque- Rocklin, CA
    Lung cancer is the most commonly diagnosed non-skin cancer in the United States. Each year, over 222,000 people are diagnosed with lung cancer, and over 150,000 succumb each year to the illness, making it also the deadliest cancer in the country. With constant advancement of treatment options, the importance of accurate diagnosis and detection of lung cancer becomes more and more relevant to the survival of the patient. Immunohistochemistry has served as the catalyst for these advancements in lung cancer diagnosis. This presentation covers many of the basic science, facts, and statistics of lung cancer, as well as the utility of immunohistochemical testing with markers such as TTF-1, napsin A, desmoglein-3, and p40 in the accurate diagnosis and survival rates of lung cancer.
  • Sample Preparation for Food Analysis: New Technologies and Techniques Recorded: Apr 27 2017 75 mins
    Jennifer Claus, Product Manager, Franchise Marketing Sample Preparation (Non-Bio)
    In typical analytical workflows, sample preparation accounts for over 60% of the time taken to generate results and 30% of any errors generated. To help analytical chemists maintain the cornerstones of all analytical processes, namely; speed, specificity, sensitivity, and reproducibility, considerable resources have been devoted to the development of new and unique technologies in the sample preparation field. With specific reference to solid phase extraction and solid phase microextraction, this presentation will outline new technologies and techniques developed in sample preparation for food analysis.
  • Sanger Arrayed CRISPR Screening in partnership with Evotec Recorded: Mar 16 2017 50 mins
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  • REACh Regulation Update Recorded: Mar 10 2017 17 mins
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    As you are aware, Triton will soon be included in the Authorization list (Annex XIV) of REACh. In order to continue to supply this material, we need some detailed information from you. In anticipation of your questions, we are hosting a webinar to answer as many of these queries as we can.
  • SygRNA™-Synthetic Two Part CRISPR RNA system Recorded: Nov 16 2016 58 mins
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    The CRISPR/Cas genome editing system has revolutionized almost every aspect of the life science industry. Until recently, the most used formats for this technology have been plasmids, mRNA, or lentivirus. Each reagent has been successful in its own right, however, each approach has limitations. SygRNATM, the two-part synthetic crRNA and tracrRNA, increases the pace of research, decreases costs, and can be used with Cas9 protein, Cas9 mRNA and Cas9 expressing cells/models.

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  • H&E and PAS Troubleshooting and Technical Advice Recorded: Nov 14 2016 62 mins
    Ute Schmidt- Global Product Manager Microscopy at Merck
    H&E is the most frequently used stain in histology and is the basis for diagnostics and further selected methods. Thus it is important to have brilliant staining. We will show which minor factors can give a negative effect or spoil the result completely. Tips will be given on improving the sensitivity of the stain. For PAS, we will give advice on how to avoid common errors and always get colourful results.
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    •Technical tricks
    •How to prevent "critical situations"
  • New Guava and Muse Algae Kits for Flow Cytometry Recorded: Nov 2 2016 39 mins
    Katherine Gillis- Sr. Research Scientist at MilliporeSigma
    In research areas such as academic, biofuel, food and pharmaceutical industries the determination of algal viability, lipid content, and cell concentration is important in the selection, monitoring, and maintenance of algal cultures. Flow cytometry has been shown to be an ideal method to assess health and lipid content of cultures but has been challenging to adopt due to high complexity and cost of traditional technologies. In this webinar, we present novel simplified methods for algal characterization using microcapillary cytometry on either a simple touch screen based cytometer, the Muse® Cell Analyzer, or a higher throughput cytometric platform, the compact Guava® easyCyte platforms. The MilliporeSigma algae kits utilize simple mix and read protocols, dedicated software modules, and provide quick results for the of count and viability measurements or relative lipid content on algae strains. The optimized and dedicated algae kits allow for high precision and comparable results to predicate methods. Data from applications to multiple common algal strains such as Chlorella vulgaris and Chlamydomonas reinhardti under different culture conditions will be presented. Availability of dedicated kits for algae research on simple and easy to use cytometric platforms will empower and enable algae researchers to rapidly select optimal culture conditions and strains for downstream experiments.
  • Multispectral Imaging Flow Cytometry: Illuminating T cell – APC Interactions Recorded: Oct 5 2016 56 mins
    Haley R. Pugsley, Ph.D, Senior Scientist at MilliporeSigma
    Interaction between antigen-specific T cells and antigen presenting cells (APC) cognate ligand involve reorganization of the cytoskeleton and recruitment of adhesive and signaling molecules to the site of intercellular contact. Sustained adhesion of T cells to APCs and formation of the immunological synapse after T cell receptor stimulation are required for the antigen-specific response. One way to measure an immunological synapse is by fluorescently labeling the molecules that have been recruited to the synapse and imaging by fluorescence microscopy. However, immunological synapses are rare and therefore difficult to analyze objectively and statistically by traditional microscopy methods. To overcome these problems, we employed the Amnis brand imaging flow cytometers to objectively collect imagery of large numbers of cells. We report the percentage of T cells involved in an organized immunological synapse, the recruitment of adhesion molecule LFA-1 and signaling molecule Lck to the synaptic complex and subsequent translocation of NFkB from the cytoplasm to the nucleus in the T cell. In this study, Raji B cells loaded with Staphylococcal enterotoxin B (SEB) were incubated with human T cells to create T cell-APC conjugates. Cells were stained in various combinations for CD3, CD19, Actin, LFA-1, Lck and NFkB. Results from the FlowSight and the ImageStream imaging flow cytometers are compared. Using the FlowSight imaging flow cytometer we demonstrate image-based parameters that were used to assess the frequency of conjugates with an organized immunological synapse in an objective and statistically significant manner. Employing the ImageStream imaging flow cytometer we further evaluate the specific location of the adhesion and signaling molecules LFA-1 and Lck within the immunological synapse complex in T cells and measure the nuclear localization of NFkB in the T cell.
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    Jeff Gordon, Director of OEM Sales, Cell Marque Corporation
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    Brian Hall, Senior Scientist at Millipore Sigma
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  • Skin Cancer and Immunohistochemistry Recorded: Jun 22 2016 63 mins
    Jeff Gordon, Director OEM Sales - Cell Marque Corporation, Rocklin CA
    Skin cancer is by far the most prevalent cancer. Each year, approximately 3.4 million people in the US alone are diagnosed with some form of skin cancer. Skin cancer can be highly treatable if it is detected and classified early, and this detection and classification is often aided by immunohistochemistry. This presentation covers many of the basic science, facts, and statistics of skin cancer, as well as the utility of immunohistochemical testing with markers such as S-100, SOX-10, Ber-Ep4, and HHV-8 in the accurate diagnosis and survival rates of skin cancer. Continuing education credits for attending this webinar will be offered through the National Society of Histotechnology
  • Growing Cell Line Potential: From Lab To Licence S2 Recorded: Jun 9 2016 26 mins
    Dr. Lily Chan, Cambridge Enterprise
    A scientific overview of the portfolio of cell lines University of Cambridge has deposited at ECACC with a focus on the KARPAS 299 and KARPAS 422 cell lines; the HeLa Mitotrap cell lines; and CHO cell lines. We will also provide an overview of the process of partnering with ECACC and Sigma-Aldrich for the storage and distribution of cell lines for research purposes. Topics include: The scientific applications of the cell lines; The types of companies and institutions we license to; Advantages of partnering with culture experts and specialised distributors; Our experience of working with ECACC and Sigma-Aldrich.
  • Growing Cell Line Potential: From Lab To Licence S1 Recorded: Jun 9 2016 24 mins
    Dr. Lily Chan, Cambridge Enterprise
    A scientific overview of the portfolio of cell lines University of Cambridge has deposited at ECACC with a focus on the KARPAS 299 and KARPAS 422 cell lines; the HeLa Mitotrap cell lines; and CHO cell lines. We will also provide an overview of the process of partnering with ECACC and Sigma-Aldrich for the storage and distribution of cell lines for research purposes. Topics include: The scientific applications of the cell lines; The types of companies and institutions we license to; Advantages of partnering with culture experts and specialised distributors; Our experience of working with ECACC and Sigma-Aldrich.
  • Sample Preparation for Food Analysis- Part 3 Recorded: May 27 2016 42 mins
    Matthias Nold, Product Manager- Merck
    Part 3 of a 3-part presentation series about food analysis focused on sample preparation and including information about Reference Material
Focusing on new / innovative technologies and industry challenges
The Life Science Business of Merck KGaA, Darmstadt, Germany Webinar Channel features scientific presentations from key specialists in analytical chemistry, biology, chemistry and life sciences on the practical and technical aspects of new developments and innovations, to help advance your research.

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  • Title: Certified Reference Materials & Proficiency Testing in the 17025 laboratory
  • Live at: May 29 2012 9:00 am
  • Presented by: Peter Jenks, Reference Materials and PT Business Development Specialist
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