• After completing all the experiments, transverse microradiography (TMR) analysis was performed to compare and correlate the PTR/LUM signals to the depth of lesions and mineral losses. (uthscsa.edu)
  • The high-penetrating power of hard X-rays and neutrons, the recent advances in instrumentation and computational methods fostered the growth of novel imaging approaches, making microradiography and computed microtomography unique tools to observe internal structures of materials undergoing processes such as melting, vesiculation, growth, dissolution or reaction of crystalline phases, fluid flow. (frontiersin.org)
  • A compact and versatile induction furnace for in situ high-resolution synchrotron and laboratory hard X-ray microradiography and computed microtomography is described. (unict.it)
  • In addition to thousands of laboratory analyses over the past few years, a major focus for both the GIA and Paspaley Pearling Company research teams has been establishing the most important criteria for present and future research: a reliable sample base of natural and cultured pearls of various types. (massoyster.org)
  • While obtaining a definitive sample base for cultured pearls is straightforward, the rarity of natural pearls makes collecting a substantial sample base challenging. (massoyster.org)
  • This sample will provide GIA with a unique and unprecedented opportunity to compare what is understood about natural structures with undrilled pearls known to be natural. (massoyster.org)
  • Each sample was examined with PTR/LUM on the root and enamel before and after treatment at times from 1 to 10 (5 on root) days of demineralization and 2 to 10 days of remineralization. (uthscsa.edu)
  • Comparison of laser fluorescence and longitudinal microradiography for quantitative assessment of in vitro enamel caries. (thieme-connect.com)
  • Following crown removal using diamond disks, the enamel samples were affixed to acrylic blocks, exposing the buccal (outer) surface. (jioh.org)
  • Baseline surface microhardness measurements were acquired for all enamel samples. (jioh.org)
  • Methods: Artificial residual lesions (depth-range: 152-682 μm, n = 34/group) were induced in human dentin samples, and lesion depths evaluated using wavelength-independent microradiography both before and after treatment with one of two tagging materials (70% SnCl2, 30% SnF2). (fu-berlin.de)
  • For 2D contact microradiography, we developed a method which allowed us to achieve image resolutions of up to 7 µm, i.e. a 3.6-fold increase compared to the industrial standard (25 µm resolution). (biomedcentral.com)
  • The method of microradiography is to analyse and exaraine the small and miniature discontinuties nondestructively in thin specimens. (itu.edu.tr)
  • in this method, especially soft X-rays, between 5 and 50 kV is used but voltages up to 50 kV is applied to metallic materials whose mass absorbtion coefficents are high.The exposure position of microradiography technigue is almost same as conventional X-rays radiography. (itu.edu.tr)
  • The conventional approach to investigate the behavior of geomaterials at non-ambient conditions, such as high temperature, high pressure, etc. is based on the study of post-mortem samples, in a "cook-and-look" fashion. (frontiersin.org)
  • This new furnace design is well suited to the study of melting and solidification processes in geomaterials, ceramics and several metallic alloys, allowing fast heating (tested up to 6.5 K s−1) and quenching (up to 21 K s−1) in order to freeze the sample microstructure and chemistry under high-temperature conditions. (unict.it)
  • in this study, microradiography and microfocus radiography technigues, have been evaluated by using a conventional X-ray tube which has a foca l spot of 4mm. (itu.edu.tr)
  • This study aims to investigate TBPs in cattle and ticks at four sampling points using real-time microfluidic PCR. (mdpi.com)
  • Historadiography is a technique formerly utilized in the fields of histology and cellular biology to provide semiquantitative information regarding the density of a tissue sample. (wikipedia.org)
  • A side-by-side comparison with a slide containing radiographs of various substances of known mass can provide a rough mass estimate, and therefore a rough approximation of the concentration of calcium salts in the sample. (wikipedia.org)
  • Several indirect analytical techniques can be used to quantify microstructural properties of natural and experimental samples such as pycnometry that provide estimates of porous media permeability or electron backscatter diffraction providing insights about nucleation and growth mechanism involved in the crystallization process. (frontiersin.org)