Results 121 to 130 of about 2,712 (288)

Dyotropic Rearrangement of Hypervalent Iodine Species: Migrative Heterofunctionalization of Quaternary Carbons

Angewandte Chemie, EarlyView.
1,2‐Aryl migration involving in situ‐generated alkyl iodine(III) species proceeds through a previously unrecognized 1,2‐C/I(III) dyotropic rearrangement. Migratory aryl fluorination, acetoxylation, and alkoxylation of 2‐alkyl‐2‐aryl‐3‐iodopropanoates provide α‐heterofunctionalized products, accompanied by aryl migration from the α‐ to the β‐position ...
Chen‐Xu Liu, Qian Wang, Matthew D. Wodrich, Jieping Zhu   +3 more
wiley   +2 more sources

Gemstones And Kartal Amethyst Formations

, 1996
Tez (Yüksek Lisans) -- İstanbul Teknik Üniversitesi, Fen Bilimleri Enstitüsü, 1996Thesis (M.Sc.) -- İstanbul Technical University, Institute of Science and Technology, 1996These man-made gemstones are not "imitations" or "fakes" but ...
Gözüpek, Banu
core  

Deep Learning–Based Extraction of Promising Material Groups and Common Features from High‐Dimensional Data: A Case of Optical Spectra of Inorganic Crystals

Advanced Intelligent Discovery, EarlyView.
We report a novel interpretation method for deep learning models based on feature extraction and clustering. Applying this method to an atomistic line graph neural network (ALIGNN) model trained on optical absorption spectra of 2,681 inorganic compounds obtained from first‐principles calculations, we successfully identify key factors underlying ...
Akira Takahashi, Yu Kumagai, Arata Takamatsu, Fumiyasu Oba   +3 more
wiley   +1 more source

The Gemstones of Roman Bath: Exploring the Global and Glocal Affordances of the Materials and Images of the Gemstones from Aquae Sulis

80 pagesAquae Sulis, a Roman settlement in modern Bath, England, was home to a temple and bath complex beginning in the late first century CE. In 1895, thirty-three Roman gemstone intaglios and one glass intaglio were identified in the complex’s drainage
Joyce, Maggie
core   +1 more source

Double Helix Structure for Stable Flexural Actuation in Soft Robotics

Advanced Intelligent Systems, EarlyView.
This work introduces a double‐helical architecture for soft robotic actuators that enhances twisting resistance, increases output force, and minimizes undesired deformation. Actuators driven by shape‐memory alloy wires exhibit a roughly fivefold higher torsional/flexural stiffness ratio and 50% greater force output.
Louis Plottel, Richard Desatnik, Dinesh K. Patel, Philip LeDuc, Carmel Majidi   +4 more
wiley   +1 more source

Carat, clarity, colour, and cut: grading the DIAMOND trial. [PDF]

Eur Heart J, 2023
Butler J, Budden J, Pitt B, Anker S.
europepmc   +1 more source

Necklace of metal and gemstones.

Necklace of metal and ...
Unknown
core  

Evaluation of Jewellery Gemstones for Optically Stimulated Luminescence Retrospective Dosimetry

Retrospective dosimetry enables dose assessment following accidental or unplanned exposure to ionizing radiation when personal dosimeters are unavailable. This study evaluates the suitability of gemstones commonly used in jewelry as fortuitous dosimeters
Dagmara Kulig, Aleksandra Jung
core   +1 more source

Hellenistic and Roman gems and jewellery from south-western Turkey

Materiale și Cercetări Arheologice
In this paper, 19 Hellenistic and Roman engraved gemstones are discussed, all of which are in the collections of local museums at Aydın and Marmaris in south‑western Turkey.
Lafli, E., Henig, M.
doaj   +1 more source

Man-Made gemstones, par D. Elwell, 1979

, 1980
Lagache Hubert. Man-Made gemstones, par D. Elwell, 1979. In: Bulletin de Minéralogie, volume 103, 6, 1980.
Lagache, Hubert
core