Results 81 to 90 of about 549,109 (310)

Electrical Conductivities of Conductors, Semiconductors, and Their Mixtures at Elevated Temperatures

Advanced Engineering Materials, EarlyView.
This article presents a comprehensive review of temperature‐dependent electrical conductivity data for multiple material classes at elevated temperatures, highlighting a persistent conductivity gap between metals and semiconductors in the range of 102$\left(10\right)^{2}$– 107$\left(10\right)^{7}$ S/m. Metal–ceramic irregular metamaterials are proposed
Valentina Torres Nieto, Marcia A. Cooper
wiley   +1 more source

Dissolved Organic Carbon Cycling in Forested Watersheds: A Carbon Isotope Approach [PDF]

Water Resources Research, 1990
Dissolved organic carbon (DOC) is important in the acid‐base chemistry of acid‐sensitive freshwater systems; in the complexation, mobility, persistence, and toxicity of metals and other pollutants; and in lake carbon metabolism. Carbon isotopes (13C and 14C) are used to study the origin, transport, and fate of DOC in a softwater catchment in central ...
Schiff, SL, Aravena, R, Trumbore, SE, Dillon, PJ   +3 more
openaire   +4 more sources

Use of stable isotopes, organic and inorganic chemistry to identify pollution sources and weathering processes in two small tropical rivers in southwestern India [PDF]

, 2012
The two main objectives of this study were to assess pollution dynamic from organic and inorganic major ion chemistry and stable isotopes (δ15N and δ18O) and to determine the weathering processes using carbon isotopes in two tropical river basins, i.e ...
Balakrishna, Keshava, Gurumurthy, G. P., Lambs, Luc, Probst, Jean-Luc, Teisserenc, Roman, Tripti, Mondal   +5 more
core  

In Situ Constructed Magnetic Core‐Shell Hydrogen‐Bonded Organic Framework‐on‐Metal–Organic Framework Structure: an Efficient Catalyst for Peroxymonosulfate Activation

Advanced Functional Materials, EarlyView.
In this work, a magnetic core‐shell catalyst (HOF‐on‐Fe3O4/ZIF‐67) is successfully synthesized, consisting of a metal–organic framework (ZIF‐67) with magnetic Fe3O4 as the core and a porous hydrogen‐bonded organic framework (HOF) as the shell. The catalyst efficiently activated peroxymonosulfate, resulting in rapid and effective removal of water ...
Yingying Du, Chenhui Ding, Chao Deng, Susanta Banerjee, Seema Agarwal   +4 more
wiley   +1 more source

Non-Redfield carbon and nitrogen cycling in the Arctic: Effects of ecosystem structure and dynamics [PDF]

, 1999
The C:N ratio is a critical parameter used in both global ocean carbon models and field studies to understand carbon and nutrient cycling as well as to estimate exported carbon from the euphotic zone.
Anderson, Annelie Skoog, Antia, Ashjian, Bamstedt, Bamstedt, Bamstedt, Bamstedt, Banse, Banse, Banse, Barthel, Barthel, Bauerfeind, Bedo, Beers, Benner, Bidigare, Booth, Budeus, Børsheim, Campbell, Carlson, Carlson, Carlson, Chen, Claustre, Cochran, Conover, Conover, Conover, Conover, Conover, Copin-Montegut, Copping, Corkett, Daly, Douglas W. R. Wallace, Drebes, Dugdale, Dugdale, Dugdale, Eilertsen, Eppley, Eva Falck, Gerber, Hansell, Hansell, Hansen, Haq, Harrison, Hasle, Honjo, Huntley, Ikeda, Ikeda, Jahnke, Johnson, Johnson, Kattner, Kendra L. Daly, Kepkay, Koroleff, Kristiansen, Lara, LeBorgne, Lewis, Longhurst, Mayzaud, McArdle, Michel Gosselin, Murray, Najjar, NEWATER Steering Committee and Principal Investigators, Patricia L. Yager, Pesant, Platt, Platt, Poulet, Redfield, Ricker, Ritzau, Rubén Lara, Sakshaug, Sambrotto, Shaffer, Siegenthaler, Six, Small, Smith, Smith, Smith, Smith, Smith, Smith, Smith, Smith, Strom, Takahashi, Tande, Tande, Toggweiler, Walker O. Smith, Wallace, Walsh, Wassman, Wheeler, Wheeler, Williams, Williams, Yager, Zar   +111 more
core   +2 more sources

Bias‐Free Highly Efficient and Stable Dye‐Sensitized Photoelectrochemical Cells via Cascade Charge Transfer

Advanced Functional Materials, EarlyView.
A buried‐junction DSPEC design is introduced that leverages cascade charge transfer to enhance efficiency, stability, and versatility. This approach facilitates effective charge transfer and minimizes recombination losses, leading to significant improvements.
Jun‐Hyeok Park, Kyounglim Kim, Jinyoung Lee, Sarang Kim, Gwangsu Yoon, So Yeon Yoon, Jeong Kyeong Lee, Ji‐Wook Jang, Tae‐Hyuk Kwon   +8 more
wiley   +1 more source

Spectral Analysis of Dissolved Organic Carbon in Seawater by Combined Absorption and Fluorescence Technology

Journal of Marine Science and Engineering
Dissolved organic carbon refers to soluble carbon substances in water bodies and can be used as an important indicator for water pollution. Spectroscopic detection is commonly used to detect dissolved organic carbon in seawater.
Xuan Cao, Feng Xiong, Yang Wang, Haikuan Ma, Yanmin Zhang, Yan Liu, Xiangfeng Kong, Jingru Wang, Qian Shi, Pingping Fan, Yunzhou Li, Ning Wu   +11 more
doaj   +1 more source

Isotopes of Carbon in a Karst Aquifer of the Cumberland Plateau of Kentucky, USA

Acta Carsologica, 2010
In this study, the concentration and isotopic composition of dissolved organic carbon (DOC) and dissolved inorganic carbon (DIC) are measured in the karst groundwater of the Otter Creek watershed of the Cumberland Plateau of Kentucky, USA.
Lee J. Florea
doaj   +1 more source

Some effects of tropical storm Agnes on water quality in the Patuxent River estuary [PDF]

, 1976
A post Agnes study emphasizing environmental factors...weekly sampling at eight stations from 28 June to August 30, 1972. Spatial and temporal changes in the distribution of many factors, e.g., salinity, dissolved oxygen (DO), seston, particulate carbon
Flemer, David A., Taylor, Donald L. Jr., Ulanowicz, Robert E.   +2 more
core  

Effect of biostimulation on biodegradation of dissolved organic carbon in biological filters [PDF]

, 2012
The addition of labile organic carbon (LOC) to enhance the biodegradation rate of dissolved organic carbon (DOC) in biological columns was studied. Acetate standard solution (NaAc) and Luria Bertrani (LB) medium were used as LOC as biostimulants in glass
A. Briedis, J. Rubulis, K. Tihomirova, T. Juhna   +3 more
core   +1 more source