Results 21 to 30 of about 340,488 (358)

Casing cementing in difficult geological conditions [PDF]

Podzemni Radovi, 2015
In extreme environments and remote areas, exploration puts increasing demands on the technology required for developing new reserves. As drilling operations for oil and gas penetrate deeper horizons, wellbore construction faces new challenges. Deeper and
Leković Branko, Karović-Maričić Vesna, Danilović Dušan   +2 more
doaj   +1 more source

Effects of microstructures on the slurry wear properties of X70 pipeline steels

工程科学学报, 2015
Slurry wear tests of three designed pipeline steels with the same chemical composition but different microstructures were performed by utilizing a wet sand/rubber wheel abrasion test apparatus.
JU Biao, WU Hui-bin, PAN Xue-fu, TANG Di
doaj   +1 more source

Research of biological agents effects on reduction of ammonia concentration in stables of intensive farm animals breeding

Research in Agricultural Engineering, 2004
In the study are presented results of experiments using bio-technological agents Amalgerol, Bio-Algeen G-40 and Biostrong 510 in intensive pig, poultry breeding and cattle slurry treatment for ammonia emissions reduction.
A. Jelínek, M. Dědina, P. Plíva, J. Souček   +3 more
doaj   +1 more source

Development of fluorine-free microporous layer composed of thermosetting melamine resin via dry coating process for polymer electrolyte fuel cells

Journal of Power Sources Advances
As polymer electrolyte fuel cells (PEFCs) become more widespread, there is growing demand to reduce the environmental impact of their production and to comply with regulations covering perfluoroalkyl and polyfluoroalkyl substances (PFAS).
Tetsushi Ohmura, Kenji Kudo, Yusuke Akimoto, Takuro Matsunaga, Hiroshi Nakamura   +4 more
doaj   +1 more source

Optimizing Livestock By-Products Storage to Reduce Ammonia and Greenhouse Gas Emissions Using Biochar and Wood Vinegar

Atmosphere
The environmental impact of livestock by-products presents significant challenges, particularly in regions with intensive farming and high pollution levels, such as the Po Valley.
Alessandra Lagomarsino, Edoardo Verga, Massimo Valagussa, Stefano Rispoli, Filippo Rocchi, Claudia Becagli, Alberto Tosca   +6 more
doaj   +1 more source

A low environmental impact system for fertirrigation of maize with cattle slurry [PDF]

, 2016
The applicability of an alternative system for managing and distributing cattle slurry during irrigation on maize was evaluated. An experiment was carried out by equipping a traveller boom with drop tubes and fed from a hose-reel machine.
Bortolini, Lucia
core   +1 more source

Study on crystallization of tetrahydrofuran hydrate and rheological properties of its slurry

You-qi chuyun
Objective Hydrate slurry transportation offers an effective way to save on reagent costs and is expected to be utilized as a safe, economical, and efficient mode for transporting natural gas through submarine pipelines.
Zhenqiang XIE, Qingping LI, Shuo YANG, Haiyuan YAO, Rui QIN   +4 more
doaj   +1 more source

Grassland carbon sequestration and emissions following cultivation in a mixed crop rotation [PDF]

, 2012
Grasslands are potential carbon sinks to reduce unprecedented increase in atmospheric CO2. Effect of age (1 to 4-yr-old) and management (slurry, grazing multispecies mixture) of a grass phase mixed crop rotation on carbon sequestration and emissions upon
Acharya, B.S., Eriksen, J., Rasmussen, J.   +2 more
core   +1 more source

Vat Photopolymerization of Additively Manufactured Zirconia Ceramic Structures from Slurries of Surface Functionalized Particles: A Critical Review

Surfaces
Zirconia (ZrO2) ceramics and composites have attracted much attention in aerospace, biomedical and energy fields due to their high hardness, high wear resistance, excellent chemical stability and biocompatibility. However, the brittleness of ceramics and
Jia-Hao Li, Yun-Zhuo Zhang, Jia-Jun Zhao, Zi-Heng Wang, Wei-Jian Miao, Fan-Bin Wu, Shu-Qi Wang, Jia-Hu Ouyang, Ya-Ming Wang, Yong-Chun Zou   +9 more
doaj   +1 more source

Spring barley yield and nitrogen recovery after application of peat manure and pig slurry [PDF]

, 2006
The effectiveness of peat manure, manufactured of pig slurry and moderately humified Sphagnum peat (slurry:peat ca. 1:1.5 v/v), as nitrogen (N) source for spring barley was investigated in a four.year field experiment on a clay loam soil in south-western
Mattila, Pasi K.
core   +2 more sources