Results 71 to 80 of about 409,894 (333)

Hydrogen nanobubbles in a water solution of dietary supplement [PDF]

arXiv, 2013
Using gas chromatography, proton nuclear magnetic resonance and qualitative experiments, we demonstrate that a water solution of dissolved dietary supplement, creating negative redox potential, contains invisible hydrogen nano-bubbles, which remain in the solution for several hours.
arxiv  

Biodegradable, Humidity‐Insensitive Mask‐Integrated E‐Nose for Sustainable and Non‐Invasive Continuous Breath Analysis

Advanced Functional Materials, EarlyView.
This study introduces a paper‐based biodegradable, humidity‐insensitive e‐nose for real‐time breath analysis, addressing challenges in existing technologies such as humidity interference, high costs, and environmental impact. Featuring hydrophobic polymer coatings, these sensors reliably detect VOCs even in high‐moisture environments.
Indrajit Mondal, Adan Zoabi, Hossam Haick   +2 more
wiley   +1 more source

New Method for Quantitative Determination of Volatile Compounds in Spirit Drinks by Gas Chromatography. Ethanol as Internal Standard [PDF]

arXiv, 2012
The new methodical approach of using ethanol as internal standard in gas chromatographic analysis of volatile compounds in spirit drinks in daily practice of testing laboratories is proposed. This method provides determination of volatile compounds concentrations in spirit drinks directly expressed in milligrams per liter (mg/L) of absolute alcohol ...
arxiv  

Sono‐Piezo‐Photosynthesis of Ethylene and Acetylene from Bioethanol under Ambient Conditions

Advanced Functional Materials, EarlyView.
A novel sono‐piezo‐photocatalytic strategy enables the conversion of bioethanol to ethylene (C2H4) and acetylene (C2H2) under ambient conditions, addressing the limitations of conventional methods that are high‐temperature and energy‐intensive. By using an advanced graphene oxide/sodium bismuth titanate heterostructure catalyst, this work achieved ...
Yue Jiang, Jiajun Zhang, Hongyang Ma, Shujie Zhou, Hsun‐Yen Lin, Sajjad S. Mofarah, Mark Lockrey, Teng Lu, Hangjuan Ren, Xiaoran Zheng, Maichael Gunawan, Suchen Huang, Yu‐Chun Huang, Fenglin Zhuo, Dali Ji, Judy N. Hart, Yun Liu, Jyh Ming Wu, Muthupandian Ashokkumar, Danyang Wang, Pramod Koshy, Charles C. Sorrell   +21 more
wiley   +1 more source

Alleviation of Aging‐Related Hallmarks in a Mouse Model of Progeria via a Nanoparticle‐Based Artificial Transcription Factor

Advanced Functional Materials, EarlyView.
Oct4‐nanoscript, a biomimetic nanoparticle‐based artificial transcription factor, precisely regulates cellular rejuvenation by activating Oct4 target genes, restoring epigenetic marks, and reducing DNA damage. In a progeria model, it effectively rescued aging‐associated pathologies and extended lifespan.
Hongwon Kim, Junyeop Kim, Euiyeon Lee, Brandon Conklin, Yannan Hou, Sumin Kim, Yerim Hwang, Ki‐Bum Lee, Jongpil Kim   +8 more
wiley   +1 more source

Desenvolvimento de metodologia para determinação de piretroides em manteiga Development of a metodology for analysis of pyrethroids in butter

Química Nova, 2010
The objective of this study was to evaluate the use of the matrix solid-phase dispersion technique associated with purification at low temperature for the determination of pyrethroids in butter. Evaluated parameters included: sample/adsorbent ratio, type
Deyse de Brito Marthe, Leila Moreira Bittencourt, Maria Eliana Lopes Ribeiro de Queiroz, Antônio Augusto Neves   +3 more
doaj   +1 more source

Mars Spectrometry 2: Gas Chromatography -- Second place solution [PDF]

arXiv
The Mars Spectrometry 2: Gas Chromatography challenge was sponsored by NASA and run on the DrivenData competition platform in 2022. This report describes the solution which achieved the second-best score on the competition's test dataset. The solution utilized two-dimensional, image-like representations of the competition's chromatography data samples.
arxiv  

Strong Stability with respect to weak limit for a Hyperbolic System arising from Gas Chromatography [PDF]

arXiv, 2009
We investigate a system related to a particular isothermal gas-solid chromatography process, called ?Pressure Swing Adsorption?, with two species and instantaneous exchange kinetics. This system presents the particularity to have a linearly degenerate eigenvalue: this allows the velocity of the gaseous mixture to propagate high frequency waves. In case
arxiv  

Studies of sebum. 6. The determination of the component fatty acids of human forearm sebum by gas–liquid chromatography [PDF]

, 1956
A. T. James, Victor R. Wheatley
openalex   +1 more source

Built‐In Electric Field in 2D/2D LDH/Antimonene Heterostructure to Induce Stable β‐NiOOH at Ultralow Potential for Cost‐Effective Water Electrolysis

Advanced Functional Materials, EarlyView.
In this paper, a built‐in electric field (BEF) strategy is proposed to fabricate NiFe‐LDH/antimonene heterostructure as bifunctional electrocatalysts for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). The formed BEF generates a local potential that reduces the potential for the formation of β‐NiOOH, thereby enabling ultra‐low ...
Jingkun Wang, Xiaoning Li, Haojie Liang, Chenxi Zhang, Huayun Du, Ying Sun, Hui Li, Hongge Pan, Yuying Hao, Min Zhao, Tianbao Li, Tianyi Ma   +11 more
wiley   +1 more source