Results 1 to 10 of about 7,690 (220)

Histovariability and fossil diagenesis of Pissarrachampsa (Pseudosuchia, Notosuchia, Baurusuchidae) from the Upper Cretaceous of Southeast Brazil. [PDF]

Anat Rec (Hoboken)
Abstract Notosuchians were key components of western Gondwanan Cretaceous ecosystems in terrestrial predator niches and exhibited remarkable taxonomic and ecological diversity. Previous research has explored their physiology, metabolism, and histology, revealing varied growth patterns and life history strategies.
Aureliano T, Maciel V, Buck PV, Montefeltro FC, Marinho TDS, Ghilardi AM.   +5 more
europepmc   +2 more sources

Common misconceptions in crystallography and crystal optics. [PDF]

J Appl Crystallogr
Six recurrent misconceptions in crystallography, some involving mineral and crystal optics, are analyzed and discussed. The explanation of these and similar misconceptions could serve as educational resources for teachers.Did you know that an X‐ray diffraction pattern is not a spectrum?
Casas L.
europepmc   +2 more sources

Biosynthesis of Silver Nanoparticles Using Black Pepper (Piper nigrum) Seed Extract and Evaluation of Their Cytotoxicity. [PDF]

Chem Biodivers
This study reports the green biosynthesis of piperine‐functionalized silver nanoparticles from Piper nigrum seed extract, followed by comprehensive physicochemical characterization and in vitro cytotoxic evaluation. The results confirm successful nanocomposite formation and demonstrate a marked enhancement of cytotoxic activity against gastric cancer ...
Maciel NF, do Lago GV, da Silva Pereira GV, de Farias Ramos IN, Bastos AC, Barreto IAR, Moraes NS, Dos Santos MN, Pereira da Rocha JA, Machado AK, Junior WGP, da Silva Pessoa MM, Uesugi MNM, Khayat AS, Cruz JN, do Rêgo JA, Joele MRSP, Brasil DDSB.   +17 more
europepmc   +2 more sources

Ru-Doped Fe₂TiO₅ as a High-Performance Electrocatalyst for Urea-Assisted Water Splitting. [PDF]

Small
Ru doping in Fe₂TiO₅ enhances urea oxidation reaction (UOR) kinetics by inducing structural distortion and creating favorable adsorption sites. The optimized 2−xRuxTiO5 exhibits superior performance with a lower onset potential and robust durability, demonstrating its potential as an efficient electrocatalyst beyond traditional photocatalytic ...
Ibrahim KB, Harrath K, Hamrang M, Bordin M, Bruyère S, Horwat D, Rodríguez-Castellón E, Sendeku MG, Shinde P, de Souza DO, Olivi L, Vomiero A, Moretti E, Shifa TA.   +13 more
europepmc   +2 more sources

Chrysoprase – history and present

Mineralogia, 2023
The authors present the history of chrysoprase discovery and the progress of knowledge about this material over the millennia, based on the extended review of world literature. Tracing the oldest archaeological artifacts from before 9,000 years, the lens
Sachanbiński Michał, Kuleba Mirosław, Natkaniec-Nowak Lucyna   +2 more
doaj   +1 more source

Thorite inclusions in zircon of the monzogranite, Lower Nubia, SW Egypt

Mineralogia, 2023
This report presents the results of a petrographical and mineralogical (optical microscopy, BSE-EDS image analysis) study of zircon in samples from the Lower Nubian monzogranite.
Hassan Kamaleldin M., Brunarska Irena
doaj   +1 more source

Minerals discovered in Poland – a review

Mineralogia, 2023
Among nearly 6,000 minerals approved by the International Mineralogical Association (IMA), 34 have been discovered on Polish territory. The article describes the history of these discoveries and the procedure for submitting and approving new minerals. It
Pieczka Adam, Dumańska-Słowik Magdalena, Kierczak Jakub   +2 more
doaj   +1 more source

Isotopic fractionation associated to nitrate attenuation by ferrous iron containing minerals [PDF]

E3S Web of Conferences, 2019
Biotic and abiotic laboratory experiments of nitrate and nitrite reduction by Fe-containing minerals were performed and the isotopic fractionation of the different reactions was calculated in order to determine whether it is possible to distinguish ...
Margalef-Marti Rosanna, Carrey Raul, Soler Albert, Otero Neus   +3 more
doaj   +1 more source

Synthesis and solubility of hopeite Zn3(PO4)2·4H2O

Mineralogia, 2023
Minerals from the phosphate groups are used in environmental engineering as thermodynamically stable vehicles for heavy metals such as zinc. The hopeite Zn3(PO4)2·4H2O was synthesized and characterized by X-ray diffraction and scanning electron ...
Bajda Tomasz, Rogowska Melania, Pawłowska Agnieszka   +2 more
doaj   +1 more source

Geological and Mineralogical Analysis of Phosphorites in the Jebel Dhyr Syncline, Eastern Algerian Atlas

Mineralogia, 2023
The characterization of phosphorite features within specific North African sedimentary series remains incomplete. Hence, the primary aim of this research is to determine the composition of powder patterns and phosphatic allochem fragments within the ...
Boulemia Salim, Hadji Riheb, Bouhlal Salah, Hamed Younes, Besser Houda, Ncibi Kaouther   +5 more
doaj   +1 more source