Results 91 to 100 of about 921,124 (210)

The effect of soil quality on phosphate, nitrite, nitrate, pH, water retuention and its effects on germination, leaf production and flowering of Arabidopsis thaliana [PDF]

open access: yes, 2012
Arabidopsis thaliana (Columbia) was exposed to 4 different soil types (100% sand, 50/50 sand and perlite, 50/50 sand/charcoal and standard potting mix) in the presence and absence of fertilizer.
Colon, Carlos   +3 more
core  

Numerical Simulation of the Plant Shelterbelt Configuration Based on Porous Media Model

open access: yesAtmosphere
Low-coverage line-belt-pattern protective forests offer significant advantages in terms of wind and sand control measures. It is important to study the windbreak effectiveness of sand-fixing forests with different spacing for the construction and ...
Yuhao Zhao   +6 more
doaj   +1 more source

Experimental Study on Optimized Sand Control in Sandstone-Mudstone Interbedded Reservoirs

open access: yesShiyou jixie
The unconsolidated sandstone reservoirs in the WC oilfield in the South China Sea is characterized by severe sand production,strong reservoir heterogeneity and staggered distribution of sandstone-mudstone interbeds.However,traditional sand control ...
Liang Yukai   +5 more
doaj  

Teknologi Budidaya Tanaman Tomat Melalui Inverted Gardening Dan Conventional Gardening Berbasis Pemanfaatan Bakteri Indigenus [PDF]

open access: yes, 2012
. Widawati, S, Sudiana, IM, Sukara, E, and Muharam, A 2012. The Technology of Tomato Plant Cultivation Through Inverted and Conventional Gardening Based on Utilization of Indigenous Bacteria.
Muharam, A. (Agus)   +3 more
core  

Integrity and Performance Evaluation of Offshore Gravel-Pack Sand Control Completions in Unconsolidated Sandstone Reservoirs

open access: yesJournal of Marine Science and Engineering
Unconsolidated sandstone reservoirs, particularly in offshore and marine environments, are highly susceptible to sand production, which leads to flow-capacity degradation, plugging evolution, sand-retention instability, and erosion–corrosion damage in ...
Guolong Li   +5 more
doaj   +1 more source

Geothermal ground heat exchangers in Malta : thermal performance assessment of infill grouts [PDF]

open access: yes, 2013
The aim of this paper was to assess the thermal conductivity of proprietary grout mixes versus local ones in Malta. Ground source heat pump (GSHP) systems consume 75% less electricity than conventional environmental control systems and have lower ...
Buhagiar, Vincent   +3 more
core  

Study on Perforation Parameters Optimization for Packing Sand Control in Unconsolidated Formations

open access: yesCejing jishu
After packing for sand control in unconsolidated sandstone formations, additional pressure drop will generate when the fluid passes through the gravel zones in the perforation tunnels and casing-screen annulus, which is one of the important factors ...
SUN Dawei   +3 more
doaj   +1 more source

Recycled Glass Fiber Reinforced Polymer Composites Incorporated in Mortar for Improved Mechanical Performance [PDF]

open access: yes, 2017
Glass fiber reinforced polymer (GFRP) recycled from retired wind turbines was implemented in mortar as a volumetric replacement of sand during the two phases of this study.
Englund, Karl   +4 more
core  

Sand Control Performance Measure System for Full Size Sand Control Screen

open access: yesShiyou jixie, 2018
To meet the sand control requirements of oil and gas well completion and evaluate the sand retaining performance of sand control screen, a set of sand control performance measure system for full size sand control screen was developed.
Wang Yao   +6 more
doaj  

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