Introduction to Air Monitoring
Whether your laboratory uses passive sampling, or active air sampling, this webinar will run through the basics of air monitoring, giving some advice on the best equipment to use for your laboratories application.
Recorded
Jun 19 2012
60 mins
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Presented by
Mr Klaus Buckendahl, European Tactical Marketing Manager, Sample Handling
Mr Klaus Buckendahl, European Tactical Marketing Manager, Sample Handling
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Characterization of sub-visible particles with Amnis imaging flow cytometry Nov 30 2017 4:00 pm UTC 75 mins
Christine Probst, Application Scientist - Merck KGaA, Darmstadt, GermanyMulti-spectral imaging flow cytometry (MIFC) is an established analytical method for cellular analysis, however has only recently been evaluated for characterization of sub-visible particles in therapeutic formulations despite numerous favorable attributes including:
• Simultaneous collection of bright-field, side-scatter, and fluorescent imagery
• Sensitive detection of particles 100 nm-100 μm
• High image quality using 20X-60X magnification objectives
• 100% sampling efficiency using hydrodynamic focusing
• Small sample volume requirement (20 μL)
• Linear concentration range up to 100 million/mL
• Wide flow cell (250 μm) minimizes clogs
Assorted case studies using MIFC for analysis of protein and vaccine formulations will be presented, with an emphasis on measurements and samples that pose challenges for current techniques- including detection of small and transparent particles, direct analysis of highly concentrated formulations, and fluorescence characterization of particle type, chemical composition, and heterogeneous interactions. -
Automation of the in vitro micronucleus assay using imaging flow cytometry Oct 24 2017 3:00 pm UTC 75 mins
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In this webinar, adaptation of the in vitro MN assay to an imaging flow cytometry-based method will be described. Using the ISX Mark II imaging flow cytometer, images of micronucleated mono- and binucleated cells as well as polynucleated cells can be captured at a high flow rate and automatically identified and scored in the Image Data Exploration and Analysis Software (IDEAS®) that accompanies the ISX. A data analysis template created specifically for this application allows for the determination of both genotoxicity and cytotoxicity following treatment with known clastogens and aneugens. This work is the first demonstration of fully automated method for performing the in vitro MN assay on an imaging flow cytometry platform. -
Recent developments in RAFT agents Oct 11 2017 7:00 pm UTC 75 mins
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Stable Isotope-Labeled Protein Internal Standards Recorded: Sep 20 2017 56 mins
James Walters, Ph.D.Mass spectrometry-based protein assays impart increased specificity and more rapid development times versus traditional methods, such as ELISA. Coupled with immunoaffinity enrichment, LC-MS/MS is becoming a powerful tool for the quantitation of proteins in plasma. Such methods typically rely on synthetic stable isotope labeled (SIL) peptide internal standards to correct for instrumental variability. For more accurate protein quantitation by LC-MS/MS, experimental variations throughout the entire sample preparation workflow, including protein fractionation, immunoaffinity enrichment, and enzymatic digestion, must be accounted for. An ideal way of improving assay reproducibility is to add a full-length stable isotope labeled recombinant protein, that is equivalent to the native target protein, to the sample at the initial stage of the assay workflow. We have developed a set of stable-isotope-labeled monoclonal antibodies expressed in CHO cells as well as SIL versions of several clinically-relevant human proteins expressed in E. coli, such as IGF1, and in mammalian HEK293 cells, such as Thyroglobulin (manufactured as a Certified Reference Material). We will present data to demonstrate that the use of full-length SIL proteins and antibodies as internal standards allows for more accurate and rapid quantitation of biotherapeutic antibodies and clinically-relevant human protein biomarkers in plasma by LC-MS/MS. -
Guava Flow Cytometry and Duolink Recorded: Aug 10 2017 42 mins
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3D Nephrotoxicity applications & Nortis’ microfluidic organ-on-chip technology Recorded: Jul 25 2017 97 mins
Dr. Ed Kelly, Dr. Henning Mann1. 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 Recorded: Jul 13 2017 75 mins
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Advanced Cell Culture Technology for Generation of In Vivo-like Tissue Models Recorded: Jun 30 2017 64 mins
Stefan Przyborski, PhD - Professor of Cell Technology, Durham University UKThe 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:
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• Information on SNAP i.d.® 2.0 system: A faster way to perform immunodetection -
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Basic Principles of Solid Phase Microextraction (SPME) Method Development Recorded: May 31 2017 74 mins
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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, CALung 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
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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
Dr Joachim Buenger-Associate Director of Corporate Regulatory Affairs & Dr Lisa Fitzpatrick, WEU Field Marketing ManagerAs 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
Dr. Gurpreet Singh Balrey- Global Technical Applications Manager at MerckThe 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.
This webinar discusses the development of the SygRNATM system, protocol optimization, and proposes workflows that enable scientists to quickly incorporate CRISPR technologies into their research. -
H&E and PAS Troubleshooting and Technical Advice Recorded: Nov 14 2016 62 mins
Ute Schmidt- Global Product Manager Microscopy at MerckH&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.
We will discuss:
•Troubleshooting
•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 MilliporeSigmaIn 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 MilliporeSigmaInteraction 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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- Title: Introduction to Air Monitoring
- Live at: Jun 19 2012 9:00 am
- Presented by: Mr Klaus Buckendahl, European Tactical Marketing Manager, Sample Handling
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