Results 11 to 20 of about 26,318 (233)

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

Thermal behaviour of alum-(Rb) RbAl(SO4)2 · 12H2O from in-situ laboratory high-temperature X-ray powder diffraction data [PDF]

, 2015
The present work investigates in-situ the thermal behaviour of alum-(Rb), RbAl(SO4)2 · 12H2O, by high-temperature X-ray powder diffraction from 303 K to melting, which starts at 359 K and is completed, due to kinetics, at 363 K.
BALLIRANO, Paolo
core   +1 more source

Mulheres pescam, sim: pesca artesanal continental em Porto Said, Botucatu [SP]

Labor & Engenho, 2018
Apesar da negação histórica e do descaso do poder público, as mulheres pescadoras de Porto Said, às margens da represa da Usina Hidrelétrica -UHE Barra Bonita, no Rio Tietê, SP, existem sim. Elas praticam pesca profissional artesanal e mantém uma relação
Berenice Pereira Balsalobre, Mariana Baggio Annibelli, Isadora Balsalobre Athias   +2 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

Microbial community changes induced by Managed Aquifer Recharge activities: linking hydrogeological and biological processes [PDF]

, 2019
Managed Aquifer Recharge (MAR) is a technique used worldwide to increase the availability of water resources. We study how MAR modifies microbial ecosystems and its implications for enhancing biodegradation processes to eventually improve groundwater ...
Barba Ferrer, Maria del Carme, Carrasquilla Gallego, Marc, Folch Sancho, Albert, Gaju Ricart, Nuria, Grau Martinez, Alba, Martínez Alonso, Maira, Sánchez Vila, Francisco Javier   +6 more
core   +2 more sources

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

Contribution of non-exchangeable potassium forms and its accumulation in corn plants

Revista Brasileira de Engenharia Agrícola e Ambiental, 2016
The state of Paraíba, Brazil, has soils from well- to poorly-developed, in which potassium (K) is found in different levels, forms and, consequently, with varying availability to plants. The objective of this study was to evaluate the contribution of non-
Montesquieu da S. Vieira, Fábio H. T. de Oliveira, Hemmannuella C. Santos, Jailma dos S. de Medeiros   +3 more
doaj   +1 more source

Atividades científicas no Império português: um estudo da obra do 'metalurgista de profissão' Manuel Ferreira da Câmara - 1783-1820 Scientific activities under the Portuguese Empire: a study of the works of Manuel Ferreira da Câmara, 'metalworker by profession' - 1783-1820

História, Ciências, Saúde: Manguinhos, 2008
O personagem Manuel Ferreira da Câmara ficou conhecido na historiografia pelo seu perfil político de estadista e parlamentar. Contudo sua trajetória histórica mostra que os interesses políticos e seus estudos das ciências naturais estavam associados ...
Alex Gonçalves Varela
doaj   +1 more source