Results 11 to 20 of about 899,395 (304)

Cerium anomaly as a tracer for paleo-oceanic redox conditions: A thermodynamics-based Ce oxidation modeling approach

Frontiers in Earth Science, 2022
Reconstructing redox conditions in the paleo-ocean is essential to understand the Earth’s biogeochemical evolution. Cerium (Ce) anomaly in marine sediments has been used to distinguish oxic versus anoxic depositional environments in the Paleo-ocean ...
Cheng Cao, Cheng Cao, Xiao-Ming Liu, Jun Chen   +3 more
doaj   +1 more source

The dependence of the consumption of dissolved oxygen on lake morphology in ice covered lakes

Hydrology Research, 2020
The consumption of oxygen in ice-covered lakes is analyzed and related to biological oxygen demand and sediment oxygen demand. An approach for computing dissolved oxygen concentration is suggested assuming horizontally mixed waters and negligable ...
Lars Bengtsson, Osama Ali-Maher
doaj   +1 more source

Dissolved oxygen determination in sewers using flow hydraulic parameters as part of a physical-biological simulation model

Journal of Hydroinformatics, 2022
This paper aims to develop a model for calculating the hydraulic and water quality parameters of wastewater within sewers. Information from the wastewater collection network and the transmission line in Birjand were used to verify the model performance ...
Reza Heydarzadeh, Massoud Tabesh, Miklas Scholz   +2 more
doaj   +1 more source

Dissolved oxygen sensing using an optical fibre long period grating coated with hemoglobin [PDF]

, 2016
A long period grating fiber optic sensor coated with hemoglobin is used to detect dissolved oxygen. The sensitivity of this sensor to the ratio of dissolved carbon dioxide to dissolved oxygen is demonstrated via the conversion of carboxyhemoglobin to
James, Stephen W., Partridge, Matthew, Tatam, Ralph P.   +2 more
core   +1 more source

Dissolved Oxygen

, 2014
The amount of dissolved oxygen in seawater is measured using the Carpenter modification of the Winkler method. Carpenters modification (1965) was designed to increase the accuracy of the original method devised by Winkler in 1889. Using Carpenters modification, the significant loss of iodine is reduced and air oxidation of iodide is minimized.
Usman Latif, Franz L. Dickert
openaire   +3 more sources

Net community production in the North Atlantic Ocean derived from Volunteer Observing Ship data [PDF]

, 2014
The magnitude of marine plankton net community production (NCP) is indicative of both the biologically driven exchange of carbon dioxide between the atmosphere and the surface ocean and the export of organic carbon from the surface ocean to the ocean ...
Bates, Behrenfeld, Benson, Boyer, Carol Robinson, Cianca, Clare Ostle, Cooper, Dickson, Ducklow, Ducklow, Emerson, Emerson, Emerson, Emerson, Emerson, Emerson, Falkowski, Garcia, Garcia, García, Giorgio, Glover, Grasshoff, Gruber, Gruber, Hooker, Johnson, Johnson, Keeling, Key, Körtzinger, Körtzinger, Landschützer, Laws, Lee, Lefèvre, Lefèvre, Liang, Longhurst, Luz, Martin Johnson, Mathis, McKinley, Najjar, Najjar, Neuer, Peter Landschützer, Quay, Quay, Redfield, Robinson, Sarmiento, Schuster, Schuster, Serret, Serret, Sharqawy, Sokal, Spitzer, Stanley, Susan Hartman, Sverdrup, Takahashi, Takahashi, Tom Hull, Uppala, Ute Schuster, Wanninkhof, Watson, Williams, Williams, Williams, Winkler, Woolf, Zhang   +75 more
core   +1 more source

A Fluorescence Based Dissolved Oxygen Sensor

智慧农业, 2020
The measurement of dissolved oxygen content in water is of great significance to aquaculture. However, the dissolved oxygen sensors on the market in China are expensive, and are difficult to maintain continuous online measurement and update parts, so ...
GU Hao, WANG Zhiqiang, WU Hao, JIANG Yongnian, GUO Ya   +4 more
doaj   +1 more source

Dissolved oxygen microelectrode sensors for analysis of trace amounts of dissolved oxygen

Journal of the College of Basic Education, 2022
يصف هذا البحث تطوير مستشعر قطب كهربائي جديد (MES) للقياسات الموضعية للأكسجين المذاب (DO) باستخدام تقنيات التصنيع الدقيق. تم استخدام تقنية الحفر الديناميكي لتصنيع مجسات استشعار بطول 20 مم وشحذها إلى أبعاد ميكرومتر. استخدمت المستشعرات قطبًا كهربائيًا لاستشعار الذهب داخل تجويف مُصنع عند طرف كل قطب كهربي صغير.
null Dr. Jasim Hilo Nema, null Zeid Abdulmajieed, null Huda Abdul Kareem Hussein   +2 more
openaire   +1 more source

Effect of temperature on the measurement of dissolved oxygen in the package.

Kvasný průmysl, 2014
The article deals with the measurement of dissolved oxygen in beverages using electronic probe and the influence of time and temperature changes on the result of measurement in a sample standing at a rest.
Jan ŠAVEL, Petr KOŠIN, Adam BROŽ
doaj   +1 more source

Effect Of Dissolved Oxygen Concentration On Activated Sludge Settleability In Sequencing Batch Reactor

Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2010
In this study, the effects of dissolved oxygen concentration and sudden decrease and increase in dissolved oxygen concentration on the settleability of activated sludge was examined in lab-scale Sequencing Batch Reactor (SBR).
Engin Gürtekin
doaj   +1 more source