Results 21 to 30 of about 1,551,844 (168)
Metal–Organic Frameworks–Based Surface–Enhanced Raman Scattering Substrates for Gas Sensing
Chemosensors, 2023 Gas sensing holds great significance in environment monitoring, real–time security alerts and clinical diagnosis, which require sensing technology to distinguish various target molecules with extreme sensitivity and selectivity.
Weiqing Xiong +3 more
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Homochirality: a prerequisite or consequence of life? [PDF]
Prebiotic Chemistry and the Origin of Life, edited by Neubeck,
Anna; McMahon, Sean. ISBN: 978-3-030-81039-9. Cham: Springer International
Publishing, 2021, pp. 87-115, 2020 Many of the building blocks of life such as amino acids and nucleotides are chiral, i.e., different from their mirror image. Contemporary life selects and synthesizes only one of two possible handednesses. In an abiotic environment, however, there are usually equally many left- and right-handed molecules.
arxiv +1 more source
Biogenic Metal Nanoparticles: A New Approach to Detect Life on Mars?
Life, 2020 Metal nanoparticles (MNPs) have been extensively studied. They can be produced via different methods (physical, chemical, or biogenic), but biogenic synthesis has become more relevant, mainly for being referred by many as eco-friendly and more ...
Marta Filipa Simões +2 more
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A Subcritical Water Extractor Prototype for Potential Astrobiology Spaceflight Missions
Earth and Space Science, 2019 A top‐level NASA exploration goal is the search for signs of life beyond Earth. Molecular biosignatures can be sought via in situ organic chemical analyses of samples collected from planetary bodies.
F. Kehl +4 more
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Mid-infrared supercontinuum-based Fourier transform spectroscopy for plasma analysis
Scientific Reports, 2022 Broadband mid-infrared (MIR) spectroscopy is a well-established and valuable diagnostic technique for reactive plasmas. Plasmas are complex systems and consist of numerous (reactive) types of molecules; it is challenging to measure and control reaction ...
R. Krebbers +10 more
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False positives and the challenge of testing the alien hypothesis [PDF]
arXiv, 2022 The origin of life and the detection of alien life have historically been treated as separate scientific research problems. However, they are not strictly independent. Here, we discuss the need for a better integration of the sciences of life detection and origins of life. Framing these dual problems within the formalism of Bayesian hypothesis testing,
arxiv
Microscopic Object Classification through Passive Motion Observations with Holographic Microscopy
Life, 2021 Digital holographic microscopy provides the ability to observe throughout a volume that is large compared to its resolution without the need to actively refocus to capture the entire volume.
Devan Rouzie +2 more
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Translational Oncology, 2023 Objective: CKAP4 (Cytoskeleton Associated Protein 4) has been reported as an important regulator of carcinogenesis. A great deal of uncertainty still surrounds the possible molecular mechanism of CKAP4 involvement in GBM.
Kaiyue Xu +11 more
doaj
Molecular Genetics & Genomic Medicine, 2019 Background Colorectal cancer is the third most common cancer worldwide. Recently, an increasing number of evidences suggest that genetic susceptibility plays an important role in the occurrence of colorectal cancer.
Peng Chen +7 more
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Artificial Cells, Nanomedicine, and Biotechnology, 2019 Mitochondrial dysfunction is a major contributory factor for myocardial ischemia-reperfusion (I/R) injury. It has been reported that Pink1-Parkin-mediated mitochondrial autophagy could effectively remove damaged mitochondria and excess ROS to ensure the ...
Wenjin Zhu +10 more
doaj +1 more source