Journal of Raman Spectroscopy | Year: 2014
This article compares the quality of Raman images obtained using metallurgical and oil immersion objectives to map complex structures in two and three dimensions. While the performance of these objectives for depth profiling planar structures has been discussed at length in the literature, the same comparison has not yet been made for 3D mapping of complex objects, where additional complications are introduced by non-planar geometries. Studying samples with increasing complexity shows that the oil immersion objective is strongly preferred because it yields brighter images with better contrast, and eliminates some new and confusing artefacts that do not arise with simple planar objects. Copyright © 2013 John Wiley & Sons, Ltd.
Physiology and Behavior | Year: 2016
Low calorie sweeteners are some of the most thoroughly tested and evaluated of all food additives. Products including aspartame and saccharin, have undergone several rounds of risk assessment by the United States Food and Drug Administration (FDA) and the European Food Safety Authority (EFSA), in relation to a number of potential safety concerns, including carcinogenicity and more recently, effects on body weight gain, glycemic control and effects on the gut microbiome. The majority of the modern day sweeteners; acesulfame K, advantame, aspartame, neotame and sucralose have been approved in the United States through the food additive process, whereas the most recent sweetener approvals for steviol glycosides and lo han guo have occurred through the Generally Recognized as Safe (GRAS) system, based on scientific procedures. While the regulatory process and review time of these two types of sweetener evaluations by the FDA differ, the same level of scientific evidence is required to support safety, so as to ensure a reasonable certainty of no harm. © 2016 Elsevier Inc.
Analyst | Year: 2010
Confocal Raman microscopy is a powerful tool for research and analysis in the chemical, materials and life sciences, particularly for non-destructive depth profiling of transparent systems. Unfortunately, many Raman microscopes are not optimally configured for this purpose, and so yield unnecessarily low signal-to-noise spectra with poor spatial resolution and grossly incorrect depth scales. This review discusses the aberrations and artefacts that can arise and describes how these can be avoided by adhering to a few basic principles that are well known to optical microscopists but which were largely ignored in the spectroscopic community for many years. © The Royal Society of Chemistry 2010.
Intertek | Date: 2012-07-02
An apparatus and method for assessing a hazard associated with an object are disclosed. The apparatus includes a haptic input/output device coupled to a computer with haptic modeling software and a display device. A virtual object and a virtual passageway are displayed on the display device. The virtual passageway includes a haptic layer along a surface thereof. Force applied by a user to the haptic input/output device causes a cursor on the display device to move the virtual object into the virtual passageway. An interaction of the virtual object with the haptic layer generates a virtual contact force which may be determined by the user sensing a corresponding tactile feedback force generated by the haptic input/output device and/or by the computer processor. The magnitude of the virtual contact force may be used to assess a hazard associated with the virtual object.
Intertek | Date: 2011-01-07
Systems and methods are provided for generating a certificate of compliance for a product. A product control system (PCS) retrieves specification and/or regulatory data for a particular product and compares the retrieved data to test result data obtained for that particular product. The PCS generates a product certification if the test result data indicates that the product is in compliance with the specification data and/or the regulatory data. A product test plan generation system (PTPGS) enables a user to interact with a user interface to retrieve a test plan for a particular product. The test plan can be used to obtain test results for the particular product.