Article
Thermodynamics
Dennis Simbarashe Moyo, Antonio Benjamim Mapossa, Melanie Rademeyer, Elizabet Margaretha van der Merwe, Walter Wilhelm Focke
Summary: Thermogravimetric analysis was used to investigate the vaporization behavior of fipronil at different temperatures. The sublimation and evaporation rates were measured, and the vapor pressure was estimated. The results showed that the sublimation enthalpy of fipronil was 120 ± 4 kJ·mol(-1), and the evaporation enthalpy was 72 ± 5 kJ·mol(-1). The study also found that the thermogravimetric method accurately predicted the vapor pressure within an error of about 12%.
THERMOCHIMICA ACTA
(2022)
Article
Thermodynamics
Sergey P. Verevkin, Vladimir N. Emel'yanenko
Summary: The absolute vapor pressures of several benzaldehyde derivatives were measured experimentally, and standard molar enthalpies of sublimation and vaporization were derived. A consistent set of thermodynamic data could be recommended for optimizing lignin valorization technologies.
FLUID PHASE EQUILIBRIA
(2021)
Article
Clinical Neurology
Kyriakos Martakis, Jens Claassen, Jordi Gascon-Bayari, Nicolina Goldschagg, Andreas Hahn, Anhar Hassan, Anita Hennig, Simon Jones, Richard Kay, Heather Lau, Susan Perlman, Reena Sharma, Susanne Schneider, Tatiana Bremova-Ertl
Summary: This clinical trial investigated the use of N-acetyl-L-leucine (NALL) in patients with GM2 gangliosidoses, and found significant clinical improvements in patient functioning and quality of life.
Article
Engineering, Biomedical
Yu-Ming Chang, Jia-Qi Xiao, Jane Christy, Chih-Yu Wu, Chao-Wei Huang, Ting-Ying Wu, Yu-Chih Chiang, Tzu-Hung Lin, Hsien-Yeh Chen
Summary: A multicomponent vapour-deposited porous (MVP) coating with combined physical and biochemical properties was fabricated based on a chemical vapour sublimation and deposition process. The coating technology exhibits adjustable hydrophobicity and elastic modulus, and allows for patterning physical structures, modulation, and compartmentalization. With the inclusion of volatile and nonvolatile multicomponents, the MVP coating demonstrates versatile biological functions and represents a simple approach for interface coating layer in materials science.
MATERIALS TODAY BIO
(2022)
Article
Chemistry, Multidisciplinary
Liyu Liu, Zaiyong Zhang, Yinxiang Cheng, Yihua Jiang, Liye Lu, Jian-Rong Wang, Xuefeng Mei
Summary: L-menthol is an important flavoring additive with diverse applications. The manufacturing and storage of L-menthol face challenges due to its high volatility and low melting point. In this study, six new solid forms of L-menthol were synthesized through cocrystallization, which significantly increased the melting point and reduced the vapor pressure, leading to higher stability under storage conditions. This superior stability can be attributed to the supramolecular cavities assembled by coformers, which restrict the movement of L-menthol molecules through hydrogen bonds.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Thermodynamics
Sagar Saren, Vivek Kumar Mishra, Kyaw Thu, Sourav Mitra
Summary: This study conducted a theoretical analysis and computational fluid dynamics (CFD) study to investigate LPJ-driven adsorption process. Important physical scales for each phase were derived and validated through order of magnitude arguments. The results suggest that using short cycle time to maintain near isothermal condition in practical PSA systems is justified.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Food Science & Technology
Sonu Sharma, Kshanaprava Dhalsamant, Punyadarshini Punam Tripathy, Raj Kumar Manepally
Summary: The study compared the effects of hot air drying and direct solar drying on turmeric, finding that direct solar drying resulted in faster drying rates, better color retention, smoother surface, and brighter color compared to hot air drying.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2021)
Article
Agriculture, Multidisciplinary
Ara Jo, Hyunbeen Park, Seongho Lee, Kwang-Geun Lee
Summary: This study aimed to reduce the difference in flavor between Robusta and Arabica coffee beans by adding L-Leucine powder. The pre-treatment method involved short soaking or spraying procedures, followed by the addition of varying levels of L-Leucine. The results showed that pre-treatment with L-Leucine improved the flavor of Robusta coffee.
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
(2023)
Article
Thermodynamics
Henoc Flores, Fernando Ramos, Juan Rodriguez-Santiago, E. Adriana Camarillo
Summary: This study presents the estimation of vapor pressures of 3-formylchromone and 3-formyl-6-methylchromone using the isothermal thermogravimetry method. The method involves measuring the rate of mass loss with temperature in a cylindrical cell and nitrogen flow, and the Langmuir equation is used to derive the vapor pressure. The enthalpy, entropy, and Gibbs energy of sublimation were also calculated, and the validity of the method was tested with phenanthrene and pyrene vapor pressures.
THERMOCHIMICA ACTA
(2023)
Article
Biotechnology & Applied Microbiology
Yuan-Yuan Jia, Yu-Li Xie, Lu-Lu Yang, Hong-Ling Shi, Yun-Feng Lu, Si-Pu Zhang, Cun-Duo Tang, Lun-Guang Yao, Yun-Chao Kan
Summary: In this study, four hypothetical leucine dehydrogenases were discovered, with PfLeuDH showing a stronger advantage, and the highly selective biosynthesis of L-Tle was successfully achieved. Efficient biosynthesis of L-Tle was carried out by whole-cell catalysis using engineered E. coli cells.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Jian Wang, Xuesong Wang, Qing Liang, Deheng Li, Dawei Li, Qunqun Guo
Summary: The addition of trimethylglycine decreases osmotic pressure inhibition for cell growth and increases amino acid production. Transcriptome analysis of Corynebacterium glutamicum revealed significant changes in gene expression, particularly in the regulation of ABC transporters and sulfur metabolism, under trimethylglycine addition.
Article
Biotechnology & Applied Microbiology
Langxing Liao, Yonghui Zhang, Yali Wang, Yousi Fu, Aihui Zhang, Ruodian Qiu, Shuhao Yang, Baishan Fang
Summary: The study constructed a fusion enzyme GDH-R3-LeuDH for the efficient biosynthesis of l-tle, which significantly improved the enzyme's environmental tolerance, thermal stability, and cofactor regeneration rate, leading to a twofold increase in l-tle productivity and yield. The fusion enzyme achieved the highest space-time yield for l-tle synthesis to date, demonstrating great potential for efficient biosynthesis of l-tle.
MICROBIAL CELL FACTORIES
(2021)
Article
Energy & Fuels
Yue Qin, Zhen Pan, Liyan Shang, Xiangguang Sun, Jianyu He, Yadi Yang, Bo Yuan
Summary: This study investigated the effect of environmentally friendly and non-foaming L-leucine, alpha-cyclodextrin, and beta-cyclodextrin on hydrate formation. The results showed that L-leucine effectively promoted hydrate formation and its effect was concentration-dependent. Beta-cyclodextrin was more effective than alpha-cyclodextrin in promoting hydrate formation. This study contributes to the development of SNG and environmentally friendly fast hydrate formation technology.
Article
Horticulture
Yan Li, Guoxin Yao, Yafang Tang, Xudong Lu, Xiu Qiao, Cheng Wang
Summary: This study identified 71 SmbZIP genes from the eggplant genome and performed gene categorization and phylogenetic analysis. Analysis of chromosome location, motif composition, and gene structure was also conducted. The results showed that SmbZIP genes play an important role in the regulation of abiotic stresses.
Review
Polymer Science
Chunyan Luo, Shoujia Li, Minggang Fang, Jianxin Sun, Wei Xiao, Feng Tang, Weixing Chen
Summary: In this study, MWCNTs-g-PLLA was prepared by ring-opening polymerization of L-LA from MWCNTs-OH, and MWCNTs-OH/PLLA(48k) and MWCNTs-g-PLLA/PLLA(48k) composites were successfully obtained. The research findings indicate that the crystallinity and maximum crystallization rate of the blends increase, and the decomposition temperature of the blends increases by over 50 degrees Celsius.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Nan Wei, Patrik Laiho, Abu Taher Khan, Aqeel Hussain, Alina Lyuleeva, Saeed Ahmed, Qiang Zhang, Yongping Liao, Ying Tian, Er-Xiong Ding, Yutaka Ohno, Esko I. Kauppinen
ADVANCED FUNCTIONAL MATERIALS
(2020)
Article
Chemistry, Physical
Yang Qian, Il Jeon, Ya-Lun Ho, Changhyun Lee, Sujeong Jeong, Clement Delacou, Seungju Seo, Anton Anisimov, Esko I. Kaupinnen, Yutaka Matsuo, Yoonmook Kang, Hae-Seok Lee, Donghwan Kim, Jean-Jacques Delaunay, Shigeo Maruyama
ADVANCED ENERGY MATERIALS
(2020)
Article
Chemistry, Physical
Er-Xiong Ding, Aqeel Hussain, Saeed Ahmad, Qiang Zhang, Yongping Liao, Hua Jiang, Esko I. Kauppinen
Article
Chemistry, Physical
Sami Sainio, Niklas Wester, Anja Aarva, Charles J. Titus, Dennis Nordlund, Esko Kauppinen, Elli Leppanen, Tommi Palomaki, Jessica E. Koehne, Olli Pitkanen, Krisztian Kordas, Maria Kim, Harri Lipsanen, Miran Mozetic, Miguel A. Caro, M. Meyyappan, Jari Koskinen, Tomi Laurila
Summary: Successful deployment of carbon nanomaterials in various applications relies on selecting, synthesizing, and tailoring surface properties. By analyzing soft X-ray absorption spectroscopy spectra, a comprehensive understanding of the chemical trends and surface properties of carbon nanomaterials has been achieved.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Ming Liu, Kaoru Hisama, Yongjia Zheng, Mina Maruyama, Seungju Seo, Anton Anisimov, Taiki Inoue, Esko Kauppinen, Susumu Okada, Shohei Chiashi, Rong Xiang, Shigeo Maruyama
Summary: Coaxial synthesis of single-walled and multiwalled molybdenum disulfide (MoS2) nanotubes on boron nitride nanotubes (BNNTs) was achieved by removing single-walled carbon nanotubes (SWCNTs) from heteronanotubes. Single-walled MoS2 nanotubes exhibit direct bandgap structure around 6-7 nm diameter, with a transition from indirect to direct gap above 5.2 nm. Presence of SWCNTs in BNNTs and single-walled MoS2 nanotubes significantly quenches the PL signal.
Article
Nanoscience & Nanotechnology
Georg Daniel Forster, Thomas D. Swinburne, Hua Jiang, Esko Kauppinen, Christophe Bichara
Summary: The study established a model for predicting the growth rates of carbon nanotubes, revealing the interaction between external experimental conditions and interface energies. The distribution of growth rates dependent on chiral angle shows non-monotonic trends with changing interface energies.
Article
Engineering, Electrical & Electronic
Zheyuan Zhang, Xiangnan Sun, Pengtao Yuan, Shoko Yokokawa, Yongjia Zheng, Hongbo Jiang, Lei Jin, Anton Anisimov, Esko Kauppinen, Rong Xiang, Shigeo Maruyama, Shinji Yamashita, Sze Y. Set
Summary: SWCNT@BNNT exhibits enhanced optical power tolerance and longer lifetime compared to pristine SWCNT, making it a promising candidate for high-power intensity applications.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Sangsu Lee, Jeong-Seok Nam, Jiye Han, Qiang Zhang, Esko Kauppinen, Il Jeon
Summary: Carbon nanotube face mask filters have strong anti-viral effects due to their superior barrier properties compared to traditional masks, along with good breathability and thermal conductivity.
ACS APPLIED NANO MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Yongping Liao, Zhao Zhang, Qiang Zhang, Nan Wei, Saeed Ahmad, Ying Tian, Esko Kauppinen
Summary: Aerosol etching strategy has been developed to prepare high-purity semiconducting SWCNTs with increased s-SWCNT ratio. The technique offers a promising option for the high-yield synthesis of s-SWCNTs and implies potential applications in TFTs.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Physical
Er-Xiong Ding, Peng Liu, Abu Taher Khan, Qiang Zhang, Nan Wei, Hua Jiang, Esko Kauppinen
Summary: In this study, high-purity, long, and isolated s-SWCNTs were continuously produced by gas-phase synthesis, maintaining their pristine morphologies. The as-produced s-SWCNTs had a purity of 98% and a mean length of 15.2 mm. The enrichment of s-SWCNTs was found to be mainly caused by overpressure in the reactor and methanol, and the s-SWCNTs exhibited a higher negative charge and a critical role of oxygen-contained species in their synthesis. The field-effect transistors based on s-SWCNTs showed a high mean charge carrier mobility, which was 2.27 times higher than that of transistors fabricated with dispersion-processed SWCNTs. The challenges of synthesis repeatability were discussed, and recommendations for improving reproducibility were provided. This study is an important step towards the scalable production of clean, long, and isolated s-SWCNTs with high purity and narrow bandgap distribution.
Article
Multidisciplinary Sciences
I Todoshchenko, M. Kamada, J-P Kaikkonen, Y. Liao, A. Savin, M. Will, E. Sergeicheva, T. S. Abhilash, E. Kauppinen, P. J. Hakonen
Summary: Low dimensional fermionic quantum systems have attracted great interest due to their unique physical phenomena. We have successfully confined He-3 on a carbon nanotube to form a 2-dimensional Fermi system and observed a quantum phase transition from 1/3 solid to an unknown, soft, and mobile solid phase.
NATURE COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Er-Xiong Ding, Peng Liu, Hoon Hahn Yoon, Faisal Ahmed, Mingde Du, Abde Mayeen Shafi, Naveed Mehmood, Esko I. Kauppinen, Zhipei Sun, Harri Lipsanen
Summary: Fabricating electronic and optoelectronic devices using a facile electrode fabrication process with SWCNT films leads to improved device performance. Dry-transferred SWCNT films as transparent electrodes in Schottky diodes for photodetector applications increase light absorption in photoactive MoS2 channels. The enhanced photodetection is attributed to FN tunneling and internal photoemission of charge carriers excited from indium tin oxide across the MoS2 layer.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Coatings & Films
Oili M. E. Ylivaara, Andreas Langner, Satu Ek, Jari Malm, Jaakko Julin, Mikko Laitinen, Saima Ali, Sakari Sintonen, Harri Lipsanen, Timo Sajavaara, Riikka L. Puurunen
Summary: This study investigates the effects of residual stress and intrinsic stress on ALD Al2O3 films, finding that post-ALD thermal processing leads to increased residual stress and that AL2O3 grown using plasma ALD has the lowest intrinsic stress. The results suggest that ALD Al2O3 films grown at 200 and 300 degrees C are suitable for applications involving post-ALD thermal processing at 700 degrees C.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2022)
Article
Chemistry, Physical
Feng Zhang, Lili Zhang, Hua Jiang, Xin Li, Fengning Liu, Zhong-Hai Ji, Peng-Xiang Hou, Shuyu Guo, Hui-Ming Cheng, Esko I. Kauppinen, Chang Liu, Feng Ding
Summary: Structurally uniform single-wall carbon nanotubes (SWCNTs) with a narrow diameter distribution (1.35 +/- 0.25 nm) were successfully synthesized using a CoRu catalyst. By optimizing the catalyst composition and growth conditions, high-efficiency and structure-controlled growth of SWCNTs were achieved.
Article
Nanoscience & Nanotechnology
Alexander A. Tonkikh, Valentina A. Eremina, Ekaterina A. Obraztsova, Dmitry A. Musatov, Alexander Yu Pereyaslavtsev, Esko Kauppinen, Elena D. Obraztsova
Summary: The efficient method presented allows for tuning the optical and electrophysical parameters of macroscopic objects made from SWCNTs by filling the inner channels with acceptors and donors in gaseous conditions. This tuning method enables predictable shifts in Fermi level position and optical band gap edge value, with potential applications in various fields such as electrochemical, sensor, solar cell, or thermoelectric electrode materials.
ACS APPLIED NANO MATERIALS
(2021)
