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Infrared (IR) and near-infrared (NIR) spectroscopy are fast, easy-to-use techniques with a history of being used for food applications such as those for measuring protein, moisture, and fat content. Food fraud and adulteration has become of particular concern to the industry over the past few years following reports of incidents in the media, with herbs and spices identified as one of the key problem areas.
This paper explores the numerous challenges materials scientists and engineers face, from the time it takes to bring new materials to market to the difficulties delivering suitable formulations and testing against specified criteria, and how those can be resolved.
Analyzing transport of biliary metabolites is essential to predict pharmacokinetics and hepatotoxicity during drug development. A functional impairment of hepatobilary transporters, such as bile salt export pump (BSEP) and multidrug resistance-associated protein 2 (MRP-2), is strongly associated with an increased risk of cholestatic liver injury. Here, we describe a 3D high-content screening assay to study hepatobiliary transporter function in InSphero human liver microtissues. Confocal imaging and automated image analysis were used to quantify BSEP and MRP-2-mediated efflux of fluorescent substrates into bile canaliculi.
This work demonstrates a robust method using SP-ICP-MS technology to detect CeO2 NPs which were extracted from soil samples with tetrasodium pyrophosphate (TSPP). Over the past few decades, engineered nanoparticles (ENPs) have been increasingly used in many commercial products. As a result, more and more ENPs have been released into the environment, which raises concerns over their fate, toxicity and transport therein.
X-ray CT imaging is commonly used for skeletal imaging as bones are densely mineralized tissues with excellent x-ray attenuation properties. In contrast, soft, less dense tissues often prove to be challenging to image due to their lack of sufficient tissue density. Soft tissues such as muscle, blood vessels and internal organs share similar x-ray attenuation characteristics and are not distinguishable under typical CT settings. In order to introduce density that would improve soft tissue contrast, several contrast agents have been developed for use in clinical and preclinical settings. This application note outlines the use of iodine and nanoparticle-based contrast agents for imaging soft tissues and vasculature in various organs using the Quantum GX to gain further insights into disease and therapeutic response.
Fundamental processes in living cells, such as apoptosis and signal transduction are controlled by proteins, often acting in concert with other protein partners through protein-protein interactions (PPIs). Inappropriate protein-protein recognition can fundamentally contribute to many diseases, including cancer. Therefore, inhibiting protein-protein interactions represents an emerging area in drug design.
Cisplatin, carboplatin, and oxaliplatin are the most widely used of platinum-based cancer chemotherapy drugs in the Western world. Cisplatin's effectiveness is due to its ability to bind to the DNA, resulting in DNA-platinum (Pt) adducts, which bend the DNA. The cells must then repair the DNA damage, otherwise DNA replication is blocked resulting in cell death. Many cancers are initially sensitive to platinum-based treatment, but patients frequently relapse with tumors displaying resistance to further cisplatin therapy.
Cells constantly sense their environment and their response is a spatio-temporal summation of all signals. To maintain physiological stability, cells need to adjust to environmental changes, a process called homeostasis. One of the most important processes involved in maintaining homeostasis is autophagy, and its significance was recognized by the award of the Nobel Prize for Physiology in 2016 to Yoshinori Ohsumi for the discovery of its underlying mechanisms. Although this is not fully understood, it is believed that autophagy can prevent tumor development by degrading, for example, damaged organelles and protein aggregates.
Quantitative pre-clinical fluorescence imaging transcends the boundaries of traditional optical imaging of biological structures and physiology by providing information at the molecular level about disease states and therapeutic response. Fluorescent Pre-clinical Imaging Agents and FMT® (Fluorescence Molecular Tomography) Quantitative Pre-clinical Imaging Systems represent powerful tools for research and drug development in the imaging of biological processes and pharmaceutical activity in living animals.
Optical-based in vivo imaging of vascular changes and vascular leak is an emerging modality for studying altered physiology in a variety of different cancers and inflammatory states. A number of fluorescent imaging probes that circulate with the blood, but have no target selectivity, have been used to detect tumor leakiness as an indication of abnormal tumor vasculature. Inflammation is also characterized by distinct vascular changes, including vasodilation and increased vascular permeability, which are induced by the actions of various inflammatory mediators. This process is essential for facilitating access for appropriate cells, cytokines, and other factors to tissue sites in need of healing or protection from infection. This application note investigates the use of three fluorescent imaging probes, to detect and monitor vascular leak and inflammation in preclinical mouse breast cancer models.
NIR Spectroscopy is a useful technique for raw materials identification and verification, but the sophistication of the technique might differ based on the sample. If the materials to be identified are spectroscopically dissimilar, it is often only necessary to use a simple distance measure such as a spectral difference for identification. If the spectra are similar, on the other hand, it may be necessary to use more sophisticated techniques which take into consideration both the intra- and inter-material spectral variation for identification and classification. The SIMCA (Soft Independent Modelling of Class Analogy) algorithm, a Principal Component Analysis (PCA) method, provides such an example.
The United States Pharmacopeia (USP) has announced that its new standards for elemental impurities in drug products has been implemented since January 1, 2018. General Chapters <232> and <2232> specify the list of elements and their permissible daily exposure (PDE) limits based on the route of administration.
1-12 of 613 Products & Services
The ViewLux® is the gold standard, ultra high-speed microplate imager, ideal for high throughput screening of compound libraries requiring the ultimate in speed, reliability and high quality data.
The ViewLux uHTS microplate imager is available outside the EU. Please contact your local representative to discuss alternative products.
The EnVision 2105 multimode plate reader provides exceptional speed, ultra-high throughput, and maximum sensitivity across all detection technologies. Tried and tested, the EnVision microplate reader gives you robust performance and reliable data for high throughput screening, time after time.
The EnVision 2105 model delivers even higher sensitivity for time-resolved fluorescence (TRF) applications, and the Enhanced Security software option includes tools to facilitate 21 CFR Part 11 compliance for integration into regulated environments (GxP). In addition, the Alpha 775 laser module is designed for plant assays.