Results 141 to 150 of about 49,905 (304)

Nonhazardous acid etches weld samples [PDF]

open access: yes, 1966
Nonhazardous citric acid solution used with 24 volt dc power supply etches weld samples.
Allen, B. C
core   +1 more source

Investigation on the fatigue strength of threaded titanium bolts Untersuchung der Ermüdungsfestigkeit von Titangewindebolzen

open access: yesMaterialwissenschaft und Werkstofftechnik, EarlyView.
New test setup for the fatigue testing of threads and the thermochemical etching of titanium alloys. Extending the service life of mechanical components is a key strategy for enhancing sustainability. This study investigates the fatigue strength of M12 threads manufactured from the titanium aluminium 6 vanadium 4 alloy.
P. du Maire   +4 more
wiley   +1 more source

Chemically etched ultrahigh-Q wedge-resonator on a silicon chip [PDF]

open access: yes, 2012
Ultrahigh-Q optical resonators are being studied across a wide range of fields, including quantum information, nonlinear optics, cavity optomechanics and telecommunications.
Chen, Tong   +6 more
core  

Ultra‐Thin Bipoly Solar Cells With Front Selective n$$ n $$‐Type TOPCon and Rear Blanket p$$ p $$‐Type TOPCon Layers

open access: yesProgress in Photovoltaics: Research and Applications, EarlyView.
Large area crystalline silicon solar cells fabricated on ultra‐thin (80 μ$$ \upmu $$m) Si wafer featuring polysilicon‐based passivating contacts on both sides can further increase the energy output per unit weight. In this work, the large area, screen‐printed solar cells with high temperature fire‐through contacts, yielded an exceptional efficiency‐to ...
Yuchi Lan   +5 more
wiley   +1 more source

Crop genotypic richness enhances biomass production and phosphorus acquisition in maize‐mycorrhiza symbiosis

open access: yesPLANTS, PEOPLE, PLANET, EarlyView.
Our study tests how soil and plant biodiversity can enhance sustainability of crop production in Kenya. We tested whether mixtures of maize varieties performed better than monocultures and tested their response to arbuscular mycorrhizal fungi. Mycorrhizal responsiveness differed significantly by maize variety, and genetic mixtures outperformed ...
Grace Ng'endo Kanyita   +3 more
wiley   +1 more source

Critical care management of hydrofluoric acid burns with a negative outcome. [PDF]

open access: yesBMJ Case Rep, 2021
Prasad A   +3 more
europepmc   +1 more source

Micropaleontological studies of lunar samples. A search for biogenic structures in the Apollo 12 lunar samples [PDF]

open access: yes
Biogeochemical and microstructural analyses on lunar rock and dust samples for biological ...
Schopf, J. W.
core   +1 more source

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