Results 41 to 50 of about 182,598 (263)

Experimental and Numerical Analysis of Flow Behavior for Reverse Circulation Drill Bit with Inserted Swirl Vanes

Geofluids, 2022
A swirling drill bit designed with an integrated vane swirler was developed to improve reverse circulation in down-the-hole hammer drilling. Its entrainment effect and influential factors were investigated by CFD simulation and experimental tests.
Cheng Yang, Jianliang Jiang, Bo Qi, Guoqing Cui, Liyong Zhang, Yunwang Chen, Pinlu Cao   +6 more
doaj   +1 more source

Hijacking emergency granulopoiesis: Neutrophil ontogeny and reprogramming in cancer

Molecular Oncology, EarlyView.
Neutrophils are highly plastic innate immune cells; their functions in cancer extend beyond the tumour microenvironment. This Review summarises current understanding of neutrophil maturation and heterogeneity and highlights tumour‐induced granulopoiesis as a systemic programme that expands immature, immunosuppressive neutrophils via tumour‐derived ...
Gabriela Marinescu, Yi Feng
wiley   +1 more source

Simulation Study of the Transport Characteristics of the Ice Core in Ice Drilling with Air Reverse Circulation

Journal of Marine Science and Engineering, 2022
Ice core drilling with air reverse circulation is a promising technology that uses high-speed airflow to transport the ice core from the bottom of the hole along the central passage of the drill pipe to the surface.
Mengke Wang, Wenbo He, Jine Cao, Bo Qi, Jingchao Chen, Pinlu Cao   +5 more
doaj   +1 more source

Reversing circulation patterns in a tropical estuary [PDF]

Journal of Geophysical Research: Oceans, 2003
A combination of current velocity and water density measurements was used to characterize the basic patterns of water exchange in the Gulf of Fonseca, a tropical estuary on the Pacific Ocean side of Central America. The measurements were obtained during spring and neap tides in March (dry season) and June (wet season) of 2001 and consisted of profiles ...
Valle-Levinson, Arnoldo, Bosley, Kathryn T.   +1 more
openaire   +2 more sources

Transcriptional profiling of circulating extracellular vesicles from prebiopsy prostate cancer patients

Molecular Oncology, EarlyView.
RNA profiling of circulating extracellular vesicles (EVs) from blood samples of men undergoing prostate biopsy identifies transcripts associated with clinically significant prostate cancer. Integrative analysis with public tumor datasets links EV‐derived gene signatures to tumor stage and progression‐free survival, highlighting CASP3, XRCC2, and RIT1 ...
Stefan Werner, Pierre Tennstedt, Randi C. Pose, Christian Müller, Katharina Besler, Svenja Schneegans, Malik Alawi, Marie C. Roesch, Sven Peine, Desiree Bonci, Joanna Budna‐Tukan, Evi Lianidou, Catherine Alix‐Panabières, Derya Tilki, Klaus Pantel   +14 more
wiley   +1 more source

Parametrical design and optimization of a reverse circulation drill bit for dust control

Frontiers in Built Environment
The reverse circulation down-the-hole air hammer drilling (RC-DTH) method is renowned for its efficiency in hard rock formations and exceptional dust control performance.
Liming Fan, Zhilin Li, Yongjiang Luo
doaj   +1 more source

Natural Norovirus Infections in Rhesus Macaques

Emerging Infectious Diseases, 2016
Using a recently developed real-time reverse transcription PCR, I retested 500 fecal samples from rhesus macaques collected in 2008. Previous conventional reverse transcription PCR testing identified 1 isolate of GII norovirus; retesting found GI, GII ...
Tibor Farkas
doaj   +1 more source

Metastasis on pause: How dormant tumor cells stay hidden within the tumor microenvironment and evade immune surveillance

Molecular Oncology, EarlyView.
Dormant cancer cells can hide in distant organs for years, evading treatment and the immune system. This review highlights how signals from the surrounding tissue and immune environment keep these cells inactive or trigger their reawakening. Understanding these mechanisms may help develop therapies to eliminate or control dormant cells and prevent ...
Kanishka Tiwary, Jose Javier Bravo‐Cordero   +1 more
wiley   +1 more source

Study on Gas–Solid Particle Dynamics and Optimal Drilling Parameters in Reverse Circulation DTH Drilling Based on CFD and Machine Learning

Applied Sciences
The reverse circulation pneumatic down-the-hole (DTH) drilling system employs percussive drilling to achieve high efficiency and strong adaptability across diverse rock formations. However, its cutting removal efficiency remains suboptimal.
Kunkun Li, Jing Zhou, Peizhi Yu, Hao Wu, Tianhao Xu   +4 more
doaj   +1 more source

The influence of direct intramuscular corticosteroid therapy on parameters of venous circulation in hypoxaemic fetuses [PDF]

Srpski Arhiv za Celokupno Lekarstvo, 2007
Introduction: The influence of glucocorticosteroid therapy on fetal lung maturation is evident but little is known about its effects on parameters of fetal venous circulation. Objective.
Babović Ivana, Plešinac Snežana, Opalić Jasna, Plećaš Darko, Ljubić Aleksandar   +4 more
doaj   +1 more source