Article
Food Science & Technology
Ja-Myung Yu, Mingi Chu, Hyunbeen Park, Jooyeon Park, Kwang-Geun Lee
Summary: The study revealed that roasting conditions, grind size, and extraction methods are significant factors affecting volatile compounds in coffee. Different types of water used for coffee extraction also had an impact on the volatile compounds present in coffee. This is the first study to analyze the volatile compounds in coffee based on various types of water and extraction methods.
Article
Engineering, Environmental
Yuuki Mochizuki, Javzandolgor Bud, Jiaqian Liu, Miki Takahashi, Naoto Tsubouchi
Summary: This study investigated the physical properties and P adsorption performance of various iron hydroxides prepared by different methods. Among the iron hydroxides, those prepared with NH3/NH4Cl buffer (Fe(A)) showed the highest P adsorption performance. The specific surface area and OH species were found to be important factors affecting the adsorption performance.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Food Science & Technology
Byungjoo Yoo, Haeun Lee, Seongho Lee, Kwang-Geun Lee
Summary: This study analyzed the levels of biogenic amines (BAs) and benzo[alpha]pyrene (B alpha p) in roasted, pan-fried, and boiled black pepper. The results showed that the levels of BAs in black pepper increased significantly with increasing temperature and time of roasting and pan-frying, while the levels decreased with increasing boiling temperature and time. The B alpha p content in black pepper also increased significantly in all three cooking conditions with increasing temperature and time.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Applied
Jeongeun Kwon, Hyunwoo Ahn, Kwang-Geun Lee
Summary: This study investigated the correlations of alpha-dicarbonyl compounds (alpha-DCs) in coffee prepared under various roasting and brewing methods. Factors such as roasting temperature, time, particle size, water quality, and brewing method were found to influence the levels of alpha-DCs in coffee. The roasting temperature and time showed strong negative correlations with the levels of alpha-DCs, with higher temperatures and longer times resulting in lower levels of these compounds.
Article
Thermodynamics
S. Kurajica, K. Muzina, I. Simcic, V. Mandic
Summary: This work presents a study of the thermal evolution of gels obtained by chelation of aluminum sec-butoxide with ethyl acetoacetate. The results show that samples with a low Eaa/Asb ratio are mainly amorphous, while samples with a high Eaa/Asb ratio are predominantly chelate. Crystallization of gamma-Al2O3 occurs between 600 and 1000 degrees C in two separate processes for all samples. Complete transition to alpha-Al2O3 at 1200 degrees C only occurs in samples with a high Eaa/Asb ratio, while it is partial for samples with a low Eaa/Asb ratio. The observed mass loss is consistent with the assumption that the overall gel content in the samples can be represented by a simplified formula Al(Eaa)(x)O(3-x)/2, where x is the Eaa/Asb ratio.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Multidisciplinary Sciences
Wilasinee Channarong, Nuttakarn Lohawiboonkij, Pitsinee Jaleyasuthumkul, Kittipong Ketpan, Nut Duangrattanaprathip, Kornchanok Wayakanon
Summary: This study investigated the fracture resistance of adhesive ceramic overlays with different designs. The results showed that there was no statistical difference in fracture resistance between the different designs. The overlay restorations were effective in strengthening damaged teeth and providing fracture resistance equal to sound teeth, and the axial wall heights and margin types did not influence this result.
SCIENTIFIC REPORTS
(2022)
Article
Construction & Building Technology
Aditya Daware, M. Z. Naser
Summary: Masonry performs well under elevated temperatures, but standardized testing procedures for fire conditions are lacking, leading to a variety of temperature-dependent material models. As a result, there is a lack of comprehensive understanding of masonry fire behavior, hindering advancements in performance-based design of masonry structures.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Biochemistry & Molecular Biology
Siqi Li, Yantong Meng, Chao Wang, Zhuoma Suonan, Xinyu Zhang, Tong Wu, Zijian Dai, Yiyun Zhang, Sameh Sharafeldin, Yumei Zhang, Qun Shen, Yong Xue
Summary: This study investigated the structural characteristics and in vitro fermentation of resistant starches obtained through different preparation processes. The results showed that resistant starches can be classified into two categories based on their fermentation and structural features. The preparation methods employed for resistant starch can determine its structural characteristics and influence its physiological properties.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2024)
Article
Energy & Fuels
Daan Zhao, Wei Chen
Summary: A coupled electrochemical and thermal model is used to study the effects of electrode thickness on polarization and thermal characteristics in lithium-ion batteries. The results show that concentration polarization in the solid matrix of the positive and negative electrodes leads to larger voltage drop amplitudes in the beginning and end of the discharge process, respectively. With an increase in electrode thickness, the ratio of concentration polarization in the liquid electrolyte to total polarization increases, resulting in higher temperatures and more non-uniform temperature distributions in the battery under higher discharge rates, and a decrease in discharge energy efficiency.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Thermodynamics
Gavin White, Alastair Hales, Yatish Patel, Gregory Offer
Summary: Thermal conductivity is a fundamental parameter in battery pack models, but current measurement methods have large errors. This paper presents three novel methods for measuring thermal conductivity and thermal diffusivity with an accuracy of 5.6%. These methods, designed for materials like lithium-ion batteries, maintain a symmetrical thermal boundary condition around the middle of the cell, leading to improved measurement accuracy. These methods represent the future for thermal characterization of lithium-ion batteries.
APPLIED THERMAL ENGINEERING
(2022)
Article
Energy & Fuels
Yue Zhang, Siyuan Cheng, Wenxin Mei, Lihua Jiang, Zhuangzhuang Jia, Zhixiang Cheng, Jinhua Sun, Qingsong Wang
Summary: This study provides a detailed analysis and implementation of the thermal failure mechanism of lithium-ion batteries, focusing on material interactions, cell-level experiments, and applications. The LiFePO4 thermal runaway mechanism is characterized through differential analysis of DSC and ARC data. The development, parameterization, and application of a thermal runaway prediction model are also discussed, with multi-heating rate data providing valuable insights for kinetic analysis and modeling.
Article
Chemistry, Physical
Sun Woong Baek, Kira E. Wyckoff, Danielle M. Butts, Jadon Bienz, Ampol Likitchatchawankun, Molleigh B. Preefer, Matevz Frajnkovic, Bruce S. Dunn, Ram Seshadri, Laurent Pilon
Summary: TiNb2O7, a shear-phase compound, has emerged as a safe and high-volumetric density replacement for graphite anodes in lithium ion batteries, retaining capacity even at high cycling rates. Pure and crystalline TiNb2O7 can be rapidly prepared using a high-temperature microwave synthesis method, with operando calorimetry revealing key thermodynamic parameters and Joule heating dominating heat generation. The small enthalpy of mixing across different degrees of lithiation indicates the rapid rate performance is due to the high rate of lithium ion diffusion.
JOURNAL OF POWER SOURCES
(2021)
Review
Energy & Fuels
Xin Wang, Hui Liu, Kai Pan, Rui Huang, Xiaoqing Gou, Yujie Qiang
Summary: A comprehensive bibliometric analysis of thermal hazards of lithium-ion batteries (LIBs) was conducted, revealing that international research mainly focuses on safety, thermal runaway, and thermal stability. The current frontiers of thermal hazard studies include fire simulation, thermal failure and heat dissipation, and the basic theories and research systems of flame retardant materials in LIBs.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Nanoscience & Nanotechnology
Chihyun Hwang, Myung-Jun Kwak, Jinhyeon Jeong, Kyungeun Baek, Ki-Yong Yoon, Cheolwon An, Jin-Wook Min, Jonghak Kim, Jeongin Lee, Seok Ju Kang, Ji-Hyun Jang, Hyun-Kon Song
Summary: This study investigated the impact of void size on the performance of lithium-oxygen batteries, finding that a specific void dimension of 0.8 μm showed superior capacity and cycling durability. The optimized void size allowed for complete decomposition of lithium peroxide during charging, preventing empty space and side reactions during discharging.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Acoustics
Jixuan Gao, Xiangning Bu, Shaoqi Zhou, Xuexia Wang, Muhammad Bilal, Fawad Ul Hassan, Ahmad Hassanzadeh, Guangyuan Xie, Saeed Chehreh Chelgani
Summary: This study comprehensively investigated the application of different Pickering emulsion preparation processes using nano-silica particles. The experimental results showed that pre-processing with R-SH could rapidly form a stable and uniform emulsion, which is essential for ultrasound emulsion preparation.
ULTRASONICS SONOCHEMISTRY
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
R. A. Nefedov, Yu A. Ferapontov, N. P. Kozlova
2ND INTERNATIONAL SYMPOSIUM ON FUNDAMENTAL ASPECTS OF RARE-EARTH ELEMENTS MINING AND SEPARATION AND MODERN MATERIALS ENGINEERING (REES-2015)
(2016)
