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The influence of tooth shade on near-infrared light transmission through human dentine and enamel: an in-vitro study.
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School of Medicine and Dentistry, Griffith University, Gold Coast, QLD, Australia.
This in-vitro study assessed the influence of the shade of human teeth on the transmission of near-infrared light. A total of 40 teeth were used. After cleaning the root surface and removing cementum, the teeth were sectioned into slices 3 mm thick, with each comprising a portion of the crown (enamel-dentine (ED)) and of the root (dentine only).
View Article and Find Full Text PDFOptical assessment of heroin using laser-induced fluorescence spectroscopy based on modified Beer-Lambert formalism.
Spectrochim Acta A Mol Biomol Spectrosc
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Department of Chemistry, Isfahan University of Technology P. O. Box 84156-833111 Isfahan, Iran.
Heroin as a derivative of morphine contains the alkaloids and flavonoids with plenty of three to five aromatic rings. The latter is known as the main source of fluorescence emission after laser excitation. Here, laser induced fluorescence (LIF) spectroscopy at excitation line of 405 nm with the solvent densitometry method is introduced based on modified Beer-Lambert (MBL), for the rapid and reliable identification of street heroin samples.
View Article and Find Full Text PDFMagnetic nanoparticles of Nd2Fe14B prepared by ethanol-assisted wet ball milling technique.
Sci Rep
January 2025
Environmental and Occupational Hazards Control Research Center, Research Institute for Health Sciences and Environment, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
The magnetic material Nd2Fe14B is one of the strongest magnetic materials found in nature. The demand for the production of these nanoparticles is significantly high due to their exceptional properties. The aim of the present study is to synthesize magnetic nanoparticles of Nd2Fe14B using ethanol in the wet ball milling technique (WBMT).
View Article and Find Full Text PDFResearch of mesoporous silica loaded lignin to enhance the anti-corrosion and anti-weathering performance of epoxy surface.
Int J Biol Macromol
January 2025
Key Laboratory of Automobile Materials, Ministry of Education, and College of Materials Science and Engineering, Jilin University, Changchun 130025, China. Electronic address:
A new type of filler was added to epoxy resin to prepare a composite coating with excellent corrosion and weathering resistance. The simple synthesis process and nonpolluting raw materials of this filler contribute to the development of green chemistry. Specifically, lignin was encapsulated in mesoporous silica, the synergistic effect between the two resulted in the formation of lignin/mesoporous silica composite particles (MSN-L) with excellent ultraviolet (UV) resistance.
View Article and Find Full Text PDFEstablishment and evaluation of rabbit model for corneal ectasia by photorefractive keratectomy.
Exp Eye Res
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Department of Ophthalmology, Zhongshan Hospital, Fudan University, Shanghai, China. Electronic address:
The study aimed to compare the effects of different types of excimer laser keratectomy on rabbit corneas and to identify the optimal disease model for corneal ectasia. Additionally, investigating the structural and molecular alterations in the novel disease model helped explore the mechanisms underlying biomechanical cues in corneal ectasia. 2.
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