Results 31 to 40 of about 53,909 (251)
Natural Gas Industry BLost circulation is a frequent and severe problem in drilling operations. To mitigate fluid loss, lost circulation material (LCM) formulations are widely used.
Heng Yang +7 more
doaj +1 more source
In vitro generation of regulatory T cells: A challenging tool for studying immune aging in humans
FEBS Open Bio, EarlyView.In vitro induction of human regulatory T cells using standard protocols generates suppressive, Foxp3‐expressing CD4+ T cells independently of TGF‐β supplementation and donor age. Regulatory T (Treg) cells play a key role in immune tolerance and homeostasis.
Lynn Muller +3 more
wiley +1 more source
FEBS Open Bio, EarlyView.This minireview explores fluorination as a key strategy to optimize therapeutic molecules and nanocarriers. By incorporating different fluorinated motifs—from single atoms to linear and branched chains—drug delivery, cellular uptake, and colloidal stability can be improved and fine‐tuned.
Martina Beccalli +2 more
wiley +1 more source
Journal of Earth Energy Engineering, 2022 Lost circulation nowadays became one of the major problems in many drilling operations worldwide. This problem is complicated for it can significantly cause non-productive time during drilling operations.
Muhammad Rizqi Al Asy'ari
doaj +1 more source
Ethical Foreground and Background in Adult Educator Work
New Directions for Adult and Continuing Education, EarlyView.ABSTRACT Adult educators work in a complex ethical environment. The very act of contributing to the learning of another is fraught with moral overtones. In this paper we consider the ethical dimensions of adult educator practice by distinguishing the ethical features of the context or ‘background’ of practice from the ethical capabilities and decision ...
Steven Hodge, Sonal Nakar
wiley +1 more source
Research and Application of Elastic Expanding Bridging Efficiency-Enhancing Material
Zuanjingye yu wanjingyeCurrent bridging lost circulation materials (LCMs) exhibit poor lost circulation control performance and limited pressure bearing capacity when used in controlling mud losses into complex fractured formations such as those with multiscale fractures and ...
Kaixiao CUI, Jinhua LIU, Daqi LI
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Journal of Chemistry, 2019 The reservoir in the Central Tarim Basin is a typical high-pressure fracture-vuggy carbonate reservoir with high temperatures, which easily leads to drilling fluid losses and the high-temperature carbonate.
Xiaoming Su +4 more
doaj +1 more source
Sealing Mechanism Based on Force Chain and Experimental Investigation of Sealing Fractures
Lithosphere, 2021 Lost circulation often occurs in fractured formations, which was a main technological problem during drilling. Conventional lost circulation material (LCM) was often used to form a plugging zone to prevent fluid loss during drilling.
Dan Bao +5 more
doaj +1 more source
microRNA‐7‐5p and α‐Synuclein SAA Predict Parkinson's Disease Phenoconversion
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective Corroborate blood neuron‐derived extracellular vesicle (NDEV) alpha‐synuclein (αSyn), the CSF αSyn seed amplification assay (αSyn‐SAA), and blood microRNA‐7‐5p (miR‐7‐5p) as markers for Parkinson's disease (PD) phenoconversion and determine if combining these markers would help select subjects who would be more likely to phenoconvert.
Shayan Zadegan +4 more
wiley +1 more source
Lost circulation control materials. Progress report [PDF]
, 1994 Work in FY 94 continued to investigate the use of calcium phosphate cements as lost circulation control materials for geothermal wells. The calcium phosphate cements were produced by reacting calcium aluminate cement with sodium phosphate compounds. Pumpable formulations with thickening times up to two hours at temperatures between 25 to 90{degrees}C ...
Allan, M. L., Kukacka, L. E.
openaire +2 more sources