Results 21 to 30 of about 399,544 (300)
Advanced Photonics Research, 2023 Optical anticounterfeiting certifies the authenticity of goods using optical information coding units. A Raman tag with Raman peaks serving as copious optical information coding units is optimal for optical anticounterfeiting.
Yau Chuen Yiu, Zhiqin Chu
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The transition zone as a host for recycled volatiles: Evidence from nitrogen and carbon isotopes in ultra-deep diamonds from Monastery and Jagersfontein (South Africa) [PDF]
, 2017 Sublithospheric (ultra-deep) diamonds provide a unique window into the deepest parts of Earth's mantle, which otherwise remain inaccessible. Here, we report the first combined C- and N-isotopic data for diamonds from the Monastery and Jagersfontein ...
Gurney, J.J. +6 more
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JOINT DIAMONDS AND LAVER DIAMONDS [PDF]
The Journal of Symbolic Logic, 2019 Abstract The concept of jointness for guessing principles, specifically ${\diamondsuit _\kappa }$ and various Laver diamonds, is introduced. A family of guessing sequences is joint if the elements of any given sequence of targets may be simultaneously guessed by the members of the family. While equivalent in the case of
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Mathematical Proceedings of the Cambridge Philosophical Society, 2010 AbstractInternal diffusion-limited aggregation is a growth model based on random walk in ℤd. We study how the shape of the aggregate depends on the law of the underlying walk, focusing on a family of walks in ℤ2 for which the limiting shape is a diamond.
Kager, W., Levine, L.
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Selection of reagent compositions for modifying spectral characteristics of weakly and anomalously luminescent diamonds in the process of X-ray luminescence separation [PDF]
Journal of Mining and Metallurgy. Section A: Mining, 2023 The feasibility of targeted modification of the spectral properties of weakly and anomalously luminescent diamonds by modifying reagents containing luminophores based on sulfides and zinc orthosilicate, characterized by medium and low deviation of the ...
Chanturiya V.A. +3 more
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Горные науки и технологии, 2023 One of the research areas focused on improving the efficiency of diamond-bearing kimberlite beneficiation processes involves the utilization of technology aimed at enhancing the recovery of weakly and anomalously luminescent diamonds during the X-ray ...
Chanturiya V. A. +4 more
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Chemical Reviews, 2020 Nitrogen is ubiquitous in both natural and laboratory-grown diamond, but the number and nature of the nitrogen-containing defects can have a profound effect on the diamond material and its properties. An ever-growing fraction of the supply of diamond appearing on the world market is now lab-grown.
Michael N. R. Ashfold +5 more
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Observation of Surface Microstructure of HPHT Synthetic Diamond Crystals and Genesis Discussion
Yankuang ceshi, 2019 BACKGROUND As the world's largest producer of synthetic diamonds, China accounts for more than 90% of the world's total production, of which high pressure-high temperature (HPHT) synthetic diamonds are dominant.
WU Xu-xu +8 more
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Insight into a Fenton-like Reaction Using Nanodiamond Based Relaxometry
Nanomaterials, 2022 Copper has several biological functions, but also some toxicity, as it can act as a catalyst for oxidative damage to tissues. This is especially relevant in the presence of H2O2, a by-product of oxygen metabolism.
Sandeep Kumar Padamati +4 more
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Литосфера, 2020 Research subject. The article presents the results of a microscopic and photogoniometric study of natural rounded diamonds of tetraghexahedral habit from the kimberlite pipe “Internationalnaya” (Yakutia). The diamonds was partially dissolved in a sulphur-
V. M. Sonin +5 more
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