Results 51 to 60 of about 1,047,819 (346)

Assessment of the Plastic Inputs From the Seine Basin to the Sea Using Statistical and Field Approaches

Frontiers in Marine Science, 2019
Global estimations state that between 0.5 and 12.7 million metric tons of plastic enter the oceans each year. They are, however, associated with great uncertainties due to methodological difficulties to accurately quantify land-based plastic fluxes into ...
Romain Tramoy, Johnny Gasperi, Rachid Dris, Rachid Dris, Laurent Colasse, Cédric Fisson, Sarah Sananes, Vincent Rocher, Bruno Tassin   +8 more
doaj   +1 more source

Glacier Mass Balance in the Manas River Using Ascending and Descending Pass of Sentinel 1A/1B Data and SRTM DEM

Remote Sensing, 2022
Mountain glaciers monitoring is important for water resource management and climate changes but is limited by the lack of a high-quality Digital Elevation Model (DEM) and field measurements.
Lili Yan, Jian Wang, Donghang Shao
doaj   +1 more source

Direct Detection of Dark Matter Debris Flows

, 2012
Tidal stripping of dark matter from subhalos falling into the Milky Way produces narrow, cold tidal streams as well as more spatially extended "debris flows" in the form of shells, sheets, and plumes. Here we focus on the debris flow in the Via Lactea II
David N. Spergel, M. Boylan-Kolchin, Mariangela Lisanti, Michael Kuhlen, S. R. Majewski   +4 more
core   +1 more source

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Rise velocity of small polyolefin plastics in a seawater tank exposed to natural conditions in Hawai’i

Environmental Research Communications
Floating plastic is ubiquitous at the ocean surface, but the transport mechanisms associated with the type of particle and the effect of environmental parameters, including the presence of a biofilm on the polymers, are very limited.
Sarah-Jeanne Royer, Kayla C Brignac, Ferenc Ronkay, Kellie Teague, Granya Morris, Jennifer Lynch, Laurent Lebreton   +6 more
doaj   +1 more source

STar-DETR: A Lightweight Real-Time Detection Transformer for Space Targets in Optical Sensor Systems

Sensors
Optical sensor systems are essential for space target detection. However, previous studies have prioritized detection accuracy over model efficiency, limiting their deployment on resource-constrained sensors.
Yao Xiao, Yang Guo, Qinghao Pang, Xu Yang, Zhengxu Zhao, Xianlong Yin   +5 more
doaj   +1 more source

Comparative analysis of cleaning ability of three nickel-titanium rotary systems: ProTaper universal, K3 and Mtwo: An in vitro scanning electron microscopic study

Nigerian Postgraduate Medical Journal, 2016
Background: Endodontic instruments including the nickel-titanium (NiTi) instruments produce debris and smear layer during instrumentation. The study was carried out to evaluate and compare the cleaning effectiveness of root canal preparation using three ...
Ambar W Raut, Vijay Mantri, Aparna Palekar, Rupal Gadodia, Shubham Kala, Radha A Raut   +5 more
doaj   +1 more source

A numerical study on the effect of debris layer on frettingwear [PDF]

, 2016
Fretting wear is the material damage of two contact surfaces caused by micro relative displacement. Its characteristic is that debris is trapped on the contact surfaces.
Abdel Wahab, Magd, Yue, Tongyan
core   +3 more sources

In vitro models of cancer‐associated fibroblast heterogeneity uncover subtype‐specific effects of CRISPR perturbations

Molecular Oncology, EarlyView.
Development of therapies targeting cancer‐associated fibroblasts (CAFs) necessitates preclinical model systems that faithfully represent CAF–tumor biology. We established an in vitro coculture system of patient‐derived pancreatic CAFs and tumor cell lines and demonstrated its recapitulation of primary CAF–tumor biology with single‐cell transcriptomics ...
Elysia Saputra, Shamsudheen Karuthedath Vellarikkal, Lixia Li, Hong Sun, Khoa Nguyen, Amber Montano, Suchitra Natarajan, Federica Piccioni, Alex Michael Tamburino, Xin Yu, Aleksandra Katarzyna Olow   +10 more
wiley   +1 more source

A new data assimilation procedure to develop a debris flow run-out model [PDF]

, 2015
Parameter calibration is one of the most problematic phases of numerical modeling since the choice of parameters affects the model\u2019s reliability as far as the physical problems being studied are concerned. In some cases, laboratory tests or physical
Bossi, G., Brezzi, Lorenzo, Cola, Simonetta, Gabrieli, Fabio, Marcato, G., Pastor, M.   +5 more
core   +1 more source