Results 31 to 40 of about 1,697,755 (307)

Electrochemical Biosensor Based on ds-DNA/N-G@CS/GCE for Highly Sensitive and Rapid Measurement of Antioxidant Activity

open access: yesECS Advances, 2023
Antioxidants remove free radicals and inhibit the oxidation of oxygen-sensitive substances, which are of great significance in disease prevention and food preservative.
Bolu Sun   +9 more
doaj   +1 more source

Correlation Analysis of the Hydrodynamic Characteristics and Stability of a Self-balancing Multistage Pump [PDF]

open access: yesJournal of Applied Fluid Mechanics
The BB5 series multistage centrifugal pump is commonly utilized for its capacity to deliver a large head. However, due to the long rotor system in the BB5 series multistage pump, the unsteady flow field structure of each impeller at every stage ...
W. S. Ma   +4 more
doaj   +1 more source

Partitioning of CH(4) and CO(2) production originating from rice straw, soil and root organic carbon in rice microcosms. [PDF]

open access: yesPLoS ONE, 2012
Flooded rice fields are an important source of the greenhouse gas CH(4). Possible carbon sources for CH(4) and CO(2) production in rice fields are soil organic matter (SOM), root organic carbon (ROC) and rice straw (RS), but partitioning of the flux ...
Quan Yuan, Judith Pump, Ralf Conrad
doaj   +1 more source

Optimization of High Uniformity Steady-State Magnetic Field Generator

open access: yes南方能源建设, 2022
[Introduction] To evaluate the anti magnetic interference ability of electrical and electronic devices, it is necessary to carry out the corresponding magnetic field immunity test, in which the high uniformity steady-state magnetic field generator is the
Yan HE
doaj   +1 more source

High Efficiency Cross-Coupled Charge Pump Circuit with Four-Clock Signals [PDF]

open access: yes, 2018
© Allerton Press, Inc. 2018A fully integrated cross-coupled charge pump circuit for boosting dc-to-dc converter applications with four-clock signals has been proposed. With the new clock scheme, this charge pump eliminates all of the reversion power loss
Cai, Xinglong   +3 more
core   +2 more sources

Thin-disk laser pump schemes for large number of passes and moderate pump source quality

open access: yes, 2015
Novel thin-disk laser pump layouts are proposed yielding an increased number of passes for a given pump module size and pump source quality. These novel layouts result from a general scheme which bases on merging two simpler pump optics arrangements ...
Antognini, A.   +8 more
core   +1 more source

Calculation of Parameters of Technological Equipment of Hydraulic Elevator Installation for Removing Sand Plugs from Wells

open access: yesНаука и техника, 2022
The paper considers the technological scheme of the hydraulic elevator installation, according to which water from a pressure tank is supplied by a working pump to the well through two parallel pipelines: a hydraulic monitor with a washing nozzle for ...
J. A. Medvedeva   +2 more
doaj   +1 more source

A numerical investigation on the vortex formation and flow separation of the oscillatory flow in jet pumps [PDF]

open access: yes, 2015
A two-dimensional computational fluid dynamics model is used to predict the oscillatory flow through a tapered cylindrical tube section (jet pump) placed in a larger outer tube.
ANSYS   +8 more
core   +3 more sources

Study on Pressure Pulsation Characteristics of Integrated Pump Gate [PDF]

open access: yesJournal of Applied Fluid Mechanics
Integrated pump-gates serve as crucial infrastructure in hydraulic engineering, urban flood control, and water transfer projects, playing a key role in enhancing engineering efficiency and ensuring public safety.
G. He   +11 more
doaj   +1 more source

DEVELOPMENT OF A SYSTEM FOR ANALYSIS AND UNLOADING OF ROAD TRAFFIC USING INFORMATION SYSTEMS

open access: yesInternational Journal of Advanced Studies, 2021
Greenhouse technology has improved significantly in recent years and the cost of associated electronic components has been steadily declining. The growing popularity of open-source software platforms and microcontrollers such as the Arduino are making ...
Linar M. Akhmetov   +3 more
doaj   +1 more source

Home - About - Disclaimer - Privacy