Results 41 to 50 of about 852,283 (182)

Real‐Time Metabolic Magnetic Resonance Spectroscopy of Pancreatic and Colon Cancer Tumor‐Xenografts with Parahydrogen Hyperpolarized 1‐13C Pyruvate‐d3

Chemistry – A European Journal, Volume 30, Issue 51, September 11, 2024.
1‐13C‐pyruvate‐d3 hyperpolarized via parahydrogen can be used to study altered metabolism with MRI in pancreatic as well as colon cancer human tumor‐xenografts. Abstract Parahydrogen‐induced polarization (PHIP) is an emerging technique to enhance the signal of stable isotope metabolic contrast agents for Magnetic Resonance (MR).
Lisa M. Fries, Theresa L. K. Hune, Sonja Sternkopf, Salvatore Mamone, Kim Lucia Schneider, Ramona Schulz‐Heddergott, Dorothea Becker, Stefan Glöggler   +7 more
wiley   +1 more source

Molecular Dynamic Simulation of Gas-oscillation Refrigeration Mechanism in a Basic-type Pulse Tube

Zhileng xuebao, 2019
Pulse-tube refrigerators are widely used in our society today, but research on the microscopic mechanism of the dynamic process of gas flow inside the pulse tube is lacking.
Wang Yuhe, Qi Yingxia, Che Yanjin, Chen Xi, Zhang Hua   +4 more
doaj   +2 more sources

MODELLING AND FAILURE ANALYSIS OF FLEXURE SPRINGS FOR A STIRLING CRYOCOOLER [PDF]

Journal of Engineering Science and Technology, 2017
In the range of milliwatt to a few watts cooling capacity, Stirling cycle and pulse tube coolers are most suitable for producing cryogenic temperatures owing to their eco-friendliness, high efficiency, cooling capacity to mass ratio etc.
RAJESH V. R., BIJU T. KUZHIVELI
doaj  

Cryogen‐free 400‐MHz nuclear magnetic resonance spectrometer as a versatile tool for pharmaceutical process analytical technology

Magnetic Resonance in Chemistry, Volume 62, Issue 7, Page 512-534, July 2024.
High temperature superconducting (HTS) ceramic materials provide magnets with liquid cryogen‐free working environment, no need of oxygen sensors and exhaust ventilation system, reducing the magnet footprint compared to low temperature superconducting (LTS) magnets, reducing long‐term maintenance costs, and enabling installation at smaller facilities ...
Maria Victoria Silva Elipe, Ikenna Edward Ndukwe, James I. Murray   +2 more
wiley   +1 more source

Development of a High Efficiency Pulse Tube Cryocooler Using Room Temperature Displacers for HTS Applications [PDF]

, 2017
The compact and high efficiency coolers working in the liquid nitrogen temperature region play an important role in HTS Applications. Stirling type pulse tube cooler servers as a promising candidate for cooling HTS devices for its advantages such as low ...
Wang, Xiaotao, Yang, Zhaohui, Pang, Xiaomin, Zhang, Yibing, Dai, Wei, Luo, Ercang   +5 more
core   +1 more source

Ultrashort large‐bandwidth X‐ray free‐electron laser generation with a dielectric‐lined waveguide

Journal of Synchrotron Radiation, Volume 31, Issue 2, Page 243-251, March 2024.
Ultrashort large‐bandwidth X‐ray free‐electron laser generation is proposed using a dielectric‐lined waveguide. With this modulation scheme through strong terahertz wakefield self‐excited, a cheap and flexible large‐bandwidth operation mode is researched for free‐electron‐laser complexes.Large‐bandwidth pulses produced by cutting‐edge X‐ray free ...
Yiwen Liu, Zhen Wang, Lingjun Tu, Chao Feng, Zhentang Zhao   +4 more
wiley   +1 more source

Multi-Parameter Collaborative Optimization of a Coaxial Pulse Tube Cryocooler Integrating Acoustic–Mechanical–Electrical Coupling and Physical Boundary Constraints

Energies
Complex parameter interactions and acoustic–mechanical–electrical (AcME) impedance mismatches restrict coaxial pulse tube cryocooler (CPTC) performance, whereas previous studies typically optimized isolated cold fingers without compressor dynamic ...
Ruming Liu, Changpei Zhuang, Chunjie Yan, Haipeng Du, Bo Wang   +4 more
doaj   +1 more source

Performance Improvement of Low Pressure Inertance Pulse tube Cryocooler

International audienceMiniaturized Pulse tube Cryocoolers integrated with knudsen pump are designed for operations under minimal vibration and low thermal noise where piston movement replaced by rarefied movement of gas molecules within small channels ...
Baldas, Lucien, Rafique, Maimuna, Korvink, Jan, Brandner, Juergen, J.   +3 more
core   +5 more sources

Parametric analysis of miniature pulse tube cryocooler regenerators at very high frequencies using REGEN 3.3

Scientific Reports
In space applications, the Miniature Pulse Tube Cryocooler (MPTC) is widely used due to its compact design and efficient performance. The regenerator is crucial for the MPTC’s performance, as it experiences maximum pressure and temperature drops.
Chetan O. Yadav, P. V. Ramana, Choon Kit Chan, Chandrakant Sonawane, Arunkumar Bongale, Subhav Singh, Deekshen Varshney   +6 more
doaj   +1 more source

Theoretical and Experimental Investigation of Flow Straighteners in U-type Pulse Tube Cryocoolers

, 2008
Presented at the 16th International Cryocooler Conference, held May 17-20, 2008 in Atlanta, Georgia.The U-type Pulse Tube Cryocooler (PTC) involves a change in the direction of gas flow as it proceeds from the regenerator to the pulse tube.
Atrey, M. D., Badgujar, A. D.
core   +1 more source