Article
Biochemistry & Molecular Biology
Amiu Shino, Maina Otsu, Koji Imai, Kaori Fukuzawa, Ella Czarina Morishita
Summary: Interest in small molecules targeting RNA is growing, but challenges remain. This study demonstrates the use of a fluorescence-based assay to screen small molecule libraries for binding and stabilization of an RNA stem-loop. The results show that fluoroquinolones bind to the target in a similar manner, supported by biophysical assays. Fragment molecular orbital calculations are used to dissect the interactions between fluoroquinolones and RNA, predicting binding free energies. The study highlights the importance of orthogonal assays in compound selection and the usefulness of FMO calculations in rational design of RNA-targeted small molecules.
ACS CHEMICAL BIOLOGY
(2023)
Article
Energy & Fuels
Qingquan Liu, Biao Lv, Yuanyuan Liu, Xiaohang Ma, Xiaodong Lu, Liang Wang, Hongxing Zhou
Summary: In this study, a coupled gas flow model considering the hysteresis effect of adsorption and desorption was constructed, and the reliability of the model was verified. The results show that the hysteresis effect has a significant influence on gas extraction.
Article
Acoustics
Maoliang Shen, Xuexi Chen, Yong Xu
Summary: The study found that the pore characteristics of coal samples fluctuate with the increase of vibration frequency, with 75 Hz vibration showing a significant improvement in coal mass permeability, promoting the diffusion and seepage of coalbed methane and its production.
SHOCK AND VIBRATION
(2021)
Article
Engineering, Chemical
Lingyu Cao, Xueyang Zhang, Yue Xu, Wei Xiang, Rui Wang, Fangjun Ding, Pizheng Hong, Bin Gao
Summary: This study found that wood biochar has better adsorption performance and higher CO2 adsorption capacity than straw biochar, due to its advanced pore structure. Linear correlation analysis showed that CO2 adsorption is controlled by both specific surface area and basicity.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Rutuja Bhusari, Jean-Sebastien Thomann, Jerome Guillot, Renaud Leturcq
Summary: This study investigates the adsorption and desorption kinetics of oxygen on CuO nanowire bundle networks by analyzing the electrical response and recovery curves of sensing devices exposed to oxygen. The diffusion of oxygen defects into the material is found to be the main reason for the observed large time constants. Additionally, the junctions between nanostructures and the hydroxylated CuO surface play important roles in the sensor performance.
ACS APPLIED NANO MATERIALS
(2022)
Article
Energy & Fuels
Hamid Sharifigaliuk, Syed Mohammad Mahmood, Reza Rezaee, Funsho Ayobami Afolabi, Izhar Ul Haq
Summary: The pore characteristics of shale and clay samples were analyzed, and the effect of shale particle size on methane sorption capacity and diffusion was investigated.
Article
Energy & Fuels
Xing Wang, Zengchao Feng, Dong Zhou, Dong Zhao, Jianmei Wang, Linjie Hu
Summary: Coalbed methane (CBM) extraction is challenging due to its strong adsorption to coal. This study proposes a thermal-enhanced extraction method using superheated water injection. Laboratory experiments were conducted to examine the temperature change during adsorption/desorption, quantify the adsorption heat, and understand the physical mechanisms of temperature modulation on methane adsorption. Pilot field tests validated the feasibility and effectiveness of this method. The results show that energy conversion occurs during adsorption/desorption, increasing temperature facilitates the desorption process, and high temperature eliminates water lock effect and shortens equilibrium time. Further field tests demonstrate significantly reduced drainage period using thermal injection compared to the conventional method. Thus, thermal-enhanced CBM extraction is disruptive and this study provides the theoretical and engineering basis for it.
Article
Chemistry, Analytical
Yu Guo, Lingling Zhang, Hongjun You, Jixiang Fang
Summary: In this study, a solution-based SERS sensing method was reported, achieving highly sensitive detection through a molecule enrichment strategy. Various types of molecules can be effectively captured in solution by adjusting the pH value, and their Raman signals are enhanced through enrichment, improving the performance of ultra-trace detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Energy & Fuels
Man Wang, Junpeng Zou
Summary: Coalbed methane (CBM) is recognized as an important fuel and chemical feedstock that should be recovered. Permeability is a key factor controlling CBM transport in coal, and the slippage effect is influential, especially in low-permeable media. A new analytical model is derived based on the cubic law, considering gas slippage and matrix shrinkage/swelling due to gas desorption/adsorption, to improve the understanding of permeability under different stress conditions.
Article
Energy & Fuels
Xiaowei Li, Chaojie Wang, Yujia Chen, Haonan Li
Summary: With the ongoing deep coal mining operations, temperature has emerged as a crucial factor impacting coal methane recovery and gas dynamic disaster prevention. Research on the influence of coal temperature on gas desorption throughout the entire process, including the initial phase, and the released gas energy has been limited. This study used a specially designed gas desorption device to explore the gas desorption characteristics under varying temperatures, revealing that higher coal temperatures result in increased gas desorption capacity, such as desorption quantity and rate. The findings also show that the impact of increased temperature on gas desorption is more pronounced with the same gas adsorption amount compared to the same gas pressure.
Article
Engineering, Environmental
Haiyang Tao, Yingshu Liu, Jinjuan Li, Chuanzhao Zhang, Chunyu Zhao, Xiong Yang, Ralph T. Yang, Ziyi Li
Summary: Adsorption is a promising technology for deep purification of nitrogen oxides (NOx) from flue gases and simultaneously recycling NO2. This study conducted experimental evaluations on practical NOx sorption performances on series of zeolites, revealing the impact of zeolite typological structure, compensating cation, and SiO2/Al2O3 ratio on purification efficacy and regenerability. The findings provide insights into the relationships between NOx adsorption performances and zeolite properties.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Thomas M. Attard, Christopher Goodwin, Povilas Nalivaika, Jennifer Attard, Vitaliy L. Budarin, Alexandra Lanot, Damien Bove, James H. Clark, Con Robert McElroy
Summary: The current process to purify cannabidiol (CBD) is time-consuming and generates toxic waste. The proposed solid phase extraction (SPE) method offers a fast and reusable way to obtain CBD, with simplicity and ease of implementation.
MATERIALS CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Analytical
Yashashwa Pandey, Daniel F. Abbott, Victor Mougel, Naresh Kumar, Renato Zenobi
Summary: Tip-enhanced Raman spectroscopy (TERS) is a powerful tool for molecular characterization at the nanoscale. This study investigates the influence of environmental factors and sample characteristics on TERS measurements. The results reveal enhanced TERS signals, reduced spurious signals, and improved probe longevity in an inert environment, as well as the impact of sample characteristics on signal enhancement.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
A. Bothe, S. E. M. Pourhosseini, P. Ratajczak, F. Beguin, A. Balducci
Summary: This study investigates the impact of operating voltage on the electrochemical performance of carbon-based electrical double-layer capacitors containing a stable electrolyte. The findings suggest that the electrolyte is promising for high voltage EDLCs, with the positive electrode being more affected than the negative one after long-term operation.
JOURNAL OF POWER SOURCES
(2021)
Article
Thermodynamics
Guangzhao Zhou, Xianggang Duan, Jin Chang, Yu Bo, Yuhan Huang
Summary: Understanding the competitive adsorption-desorption mechanisms in shale is crucial for improving CH4 recovery and CO2 sequestration. This study used nuclear magnetic resonance to investigate the impact of CO2 on the adsorption-desorption behaviors of CH4 in plug-sized samples. The results revealed distinct peaks in the transverse relaxation time (T2) spectrum, indicating the different states of adsorbed CH4 and free state CH4 in pores and fractures. The introduction of CO2 led to changes in the T2 signals, resulting in a higher desorption rate of adsorbed CH4.
