Results 31 to 40 of about 10,701 (165)

Quasi-Periodic Oscillatory Motion of Particles Orbiting a Distorted, Deformed Compact Object

open access: yesUniverse, 2021
This work explores the dynamic properties of test particles surrounding a distorted, deformed compact object. The astrophysical motivation was to choose such a background as to constitute a more reasonable model of a real situation that arises in the ...
Shokoufe Faraji, Audrey Trova
doaj   +1 more source

The economics of microgravity research [PDF]

open access: yesnpj Microgravity, 2015
In this introduction to the economics of microgravity research, DiFrancesco and Olson explore the existing landscape and begin to define the requirements for a robust, well-funded microgravity research environment. This work chronicles the history, the opportunities, and how the decisions made today will shape the future.
DiFrancesco, Jeanne M, Olson, John M
openaire   +2 more sources

Experimental and numerical study on capillary flow along deflectors in plate surface tension tanks in microgravity environment

open access: yesAIP Advances, 2019
Surface tension tanks are the most widely used satellite propellant tanks, which use liquid surface tension for liquid transportation and gas-liquid separation to provide pure propellant for thruster.
Shangtong Chen   +3 more
doaj   +1 more source

Simulated microgravity compromises mouse oocyte maturation by disrupting meiotic spindle organization and inducing cytoplasmic blebbing. [PDF]

open access: yesPLoS ONE, 2011
In the present study, we discovered that mouse oocyte maturation was inhibited by simulated microgravity via disturbing spindle organization. We cultured mouse oocytes under microgravity condition simulated by NASA's rotary cell culture system, examined ...
Changli Wu   +7 more
doaj   +1 more source

Bioinformatic analysis of the RNA expression patterns in microgravity-induced bone loss

open access: yesFrontiers in Genetics, 2022
Researchers have linked microgravity in space to the significant imbalance between bone formation and bone resorption that induces persistent bone loss in load-bearing bones.
Xiaoyan Zhang   +11 more
doaj   +1 more source

Investigation on the Band Gap and Negative Properties of Concentric Ring Acoustic Metamaterial

open access: yesShock and Vibration, 2018
The acoustic characteristics of 2D single-oscillator, dual-oscillator, and triple-oscillator acoustic metamaterials were investigated based on concentric ring structures using the finite element method.
Meng Chen   +3 more
doaj   +1 more source

The Study of the Mechanism of Protein Crystallization in Space by Using Microchannel to Simulate Microgravity Environment

open access: yesCrystals, 2018
Space is expected to be a convection-free, quiescent environment for the production of large-size and high-quality protein crystals. However, the mechanisms by which the diffusion environment in space improves the quality of the protein crystals are not ...
Yong Yu, Kai Li, Hai Lin, Ji-Cheng Li
doaj   +1 more source

SARS‐CoV‐2 and hypertension

open access: yesPhysiological Reports, 2021
The objective of this review is to give an overview of the pathophysiological effects of the Coronavirus Disease 2019 (COVID‐19) in relation to hypertension (HT), with a focus on the Renin–Angiotensin–Aldosterone System (RAAS) and the MAS receptor. HT is
Briyanth Ravichandran   +5 more
doaj   +1 more source

Parameter Design for Inter-Satellite Laser Link Acquisition Under Weak Light Conditions

open access: yesRemote Sensing
For the Taiji program or other LISA-like space-based gravitational wave (GW) detection missions, establishing laser links is a prerequisite for entering the normal science mode.
Mengyang Zhao   +5 more
doaj   +1 more source

Microgravity protein crystallization [PDF]

open access: yesnpj Microgravity, 2015
AbstractOver the past 20 years a variety of technological advances in X-ray crystallography have shortened the time required to determine the structures of large macromolecules (i.e., proteins and nucleic acids) from several years to several weeks or days.
Mcpherson, Alexander, DeLucas, Lawrence
openaire   +4 more sources

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