Results 221 to 230 of about 1,123,828 (350)

Rock-Drilling Machine [PDF]

Scientific American, 1877
openaire   +1 more source

Late Quaternary climatic variability in the Eastern Mediterranean recorded in Hermes Cave, Corinth Rift, Greece

Journal of Quaternary Science, EarlyView.
ABSTRACT The Greek peninsula lies at the intersection of major atmospheric circulation systems, making it a key location for reconstructing past climate variability in the Eastern Mediterranean. In this study, we present a new high‐resolution multi‐proxy speleothem record from Hermes Cave, located on the shoulder of the Corinth Rift in southern Greece.
Ch. Pennos, S. Pechlivanidou, S. Modestou, A. Persoiu, S.F.M. Breitenbach, U. Ninnemann, R.L. Gawthorpe, J. Maccali, S‐E. Lauritzen, R.Ø. Skoglund, Th. Thuesen   +10 more
wiley   +1 more source

Study on evaluation method for hydromechanical properties of hard and brittle shale based on indentation hardness. [PDF]

Sci Prog
Cui S, Jianfa W, Zeng B, Huang H, Chen L, Liu H, Zhang Z.   +6 more
europepmc   +1 more source

A new, ~4500‐year varve record and high‐resolution tephrochronology from lake Hämälänlampi, eastern Finland, provides age constraints for the Furnas C and the Glen Garry/Askja A‐2000 eruptions

Journal of Quaternary Science, EarlyView.
ABSTRACT The northern European distal cryptotephra framework is constantly developing both in terms of identification of new tephra horizons and improved age constraints for the already well‐established tephra marker horizons. However, many prehistoric tephra layers have only been dated by the radiocarbon method, with its inherent problems.
Maarit Kalliokoski, Veera Erola, Saija Saarni   +2 more
wiley   +1 more source

Research and engineering practice on mechanical reaming for pressure relief and rock burst prevention technology in hard coal seam roadways. [PDF]

Sci Rep
Xie JH, Ding ZW, Zhu GA, Hao XQ, Jia JD.
europepmc   +1 more source

Raman Line Scan Analyses and a New Hypothesis for the Formation of Anatase‐Hosting Microbialites: Study of the Stromatolites From Saint‐Jean‐de‐la‐Rivière, Cotentin, France

Journal of Raman Spectroscopy, EarlyView.
Micrometer analysis of millimeter lines of Raman spectra concludes in the association of anatase and graphitized organic matter (graphogen). The photosynthetic microorganisms at the origin of the microbialites produce O2, which is transformed by TiO2 into reactive species that, in turn, decompose the organic matter of the microorganisms. ABSTRACT Raman
Marie‐Paule Bassez
wiley   +1 more source

The deformation characteristics and the prefabricated crack pressure relief stability control of a small coal pillar roadway under stress superposition. [PDF]

Sci Rep
Cheng S, Ma Z, Li Y, Zhang X.
europepmc   +1 more source

Microemulsion‐Based Drilling Fluids Incorporating Seashell Residue Powder: A Sustainable Approach to Fluid Loss Control

Journal of Surfactants and Detergents, EarlyView.
Two microemulsion‐based drilling fluids incorporating SSRP were formulated using pine oil, the nonionic surfactant Alkonat L100W, and a glycerol/water solution. The results provide valuable insights into how surfactant‐assisted microemulsion systems can be engineered to enhance the performance and eco‐efficiency of drilling fluids.
Luara Ribeiro Viana, Raphael Ribeiro da Silva, João Pedro Gonçalves de Souza Soares, José Cavalcante de Queiroz Neto, Maria Eduarda Araújo Pessoa, Rafael Peixoto Alves, Fabiola Dias da Silva Curbelo   +6 more
wiley   +1 more source

Stability analysis of deep and large vertical shaft excavation by raise boring machine method through upper soft and lower hard strata. [PDF]

Sci Rep
Wang G, Fang Y, Deng F, Ren K, Xu H.
europepmc   +1 more source

Salt‐induced nutritional and metabolic shifts in halophytes: implications for food security

Journal of the Science of Food and Agriculture, EarlyView.
Abstract Plant species vary in their response to salinity: some crops show a degree of salt tolerance, while halophytes – whether wild or cultivated – are characterized by a high capacity to thrive under saline conditions. Halophytes are considered a source of valuable secondary metabolites with potential economic value, yet they might also produce ...
Giulia Atzori, Pedro Garcia Caparros, Antonella Castagna, Luisa Custódio, Valentina Lazazzara, Claus Krogh Madsen, Felicia Menicucci, Maria João Rodrigues, Katalin Solymosi, Jose Ramon Acosta Motos   +9 more
wiley   +1 more source