Article
Pharmacology & Pharmacy
Anis Moradikouchi, Anders Sparen, Olof Svensson, Staffan Folestad, Jan Stake, Helena Rodilla
Summary: In this study, the feasibility of using terahertz spectroscopy combined with multivariate analysis for the quantification of API concentration and tablet density in pharmaceutical tablets was explored. The results showed that terahertz spectroscopy can accurately measure tablet density and has lower scattering effects compared to Raman and NIR spectroscopy.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2023)
Article
Chemistry, Analytical
Zhengmin Tang, Jianbo Miao, Quancheng Liu, Weiwei Qu, Lichuan Luo, Liping Shang, Hu Deng
Summary: This study utilizes terahertz time domain spectroscopy to measure the optical parameters of aqueous AP samples and constructs five quantitative prediction models. The optimized extreme learning machine model based on the absorption coefficient with the help of chemometrics shows the best prediction results for moisture content. The research provides a reliable basis for accurate prediction of the moisture content of AP and similar substances, paving the way for rapid and non-destructive detection methods.
MICROCHEMICAL JOURNAL
(2021)
Article
Biochemistry & Molecular Biology
Yan-Ning Xie, Ting Yang, Bin-Tao Zhang, Qian-Qian Qi, An-Ming Ding, Lian-Guang Shang, Yu Zhang, Qian Qian, Zhong-Feng Zhang, Ning Yan
Summary: The loss of seed shattering is a crucial event in crop domestication, and understanding the genetic mechanisms behind it can help reduce yield loss in crop production. This study identified and analyzed the BELL family of transcription factor-encoding genes in Chinese wild rice for the first time. Two genes, ZlqSH1a and ZlqSH1b, were identified as key candidates involved in seed shattering in Z. latifolia. These genes regulate the development of the abscission layer and enhance seed shattering in rice. Transcriptome sequencing revealed differentially expressed genes related to seed shattering between the wild type and transgenic plants.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Multidisciplinary Sciences
Nicolas Couture, Wei Cui, Markus Lippl, Rachel Ostic, Defi Junior Jubgang Fandio, Eeswar Kumar Yalavarthi, Aswin Vishnuradhan, Angela Gamouras, Nicolas Y. Joly, Jean-Michel Menard
Summary: Slow motion movies can be used to monitor low-energy resonances and reveal fast structural or chemical transitions by replacing images with terahertz waves. By combining THz spectroscopy with a real-time monitoring technique, we have demonstrated the ability to resolve non-reproducible phenomena at 50k frames per second. Our experimental configuration using the photonic time-stretch technique allows for unprecedented data acquisition speeds and enables the study of fast irreversible processes at THz frequencies.
NATURE COMMUNICATIONS
(2023)
Article
Physics, Multidisciplinary
Yong Tan, Hang Zhao, Wei-Min Wang, Rui Zhang, Yue-Jin Zhao, Cun-Lin Zhang, Xi-Cheng Zhang, Liang-Liang Zhang
Summary: In this study, a THz coherent detection scheme based on liquid water is proposed. The scheme offers high sensitivity and a wide frequency range for the time-resolved waveform of the THz field. It is sensitive to THz polarization and phase difference, and also demonstrates robustness and flexibility.
PHYSICAL REVIEW LETTERS
(2022)
Article
Optics
Hiroaki Niwa, Naotaka Yoshikawa, Masashi Kawaguchi, Masamitsu Hayashi, Ryo Shimano
Summary: This study introduces a method of generating two fundamental terahertz cylindrical vector beams (THz-CVBs) using a spintronic THz emitter, demonstrating the production of azimuthally- and radially-polarized THz pulses. By employing mode conversion with a triangular Si prism, both experimental and numerical results confirm the generation of these THz vector beams, opening up possibilities for sophisticated polarization control in the terahertz regime.
Article
Chemistry, Physical
Ziming Zhang, Jiyuan Fang, Yanhua Bo, Jiadan Xue, Jianjun Liu, Zhi Hong, Yong Du
Summary: This study investigated the structure and properties of anti-tuberculosis drug-drug cocrystals using a combination of experimental and simulation methods, providing valuable insights into the formation of cocrystals and their molecular interactions.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Engineering, Electrical & Electronic
Jinwoo Lee, Soohyun Kim
Summary: This article introduces an analytical method for measuring the quantitative ratio of components in a mixture using terahertz time-domain spectroscopy (THz-TDS), demonstrating its feasibility in concentration analysis.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Article
Chemistry, Physical
Feng Zhang, Keisuke Tominaga, Michitoshi Hayashi, Masahiko Tani
Summary: The study used solid-state density functional theory to calculate the THz spectra of DL- and L-alanine, revealing their similarities and differences. Two critical aspects regarding the intensities of the THz bands were identified, showing that the THz normal modes are dominated by intermolecular translations and influenced by the polarization effect. These findings provide a deeper understanding of the spectral differences observed in the absorption spectra.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Materials Science, Multidisciplinary
Hsin-Yi Peng, Yi-An Wei, Kao-Chi Lin, Shen-Fu Hsu, Jyh-Chern Chen, Chin-Ppao Cheng, Chan-Shan Yang
Summary: The research shows that mixing ceramic materials into the polymer ABS can improve its mechanical performance and give it fine optical properties under THz radiation.
OPTICAL MATERIALS EXPRESS
(2023)
Article
Optics
Ying Li, Tian-Yao Zhang, Zhao-Hui Zhang, Jian-Feng Yan, Xuan Zhao, Xiao-Yan Zhao, Xing-Yue Li, Xian-Hao Wu, Lu Yin, Yuan Yuan, Jian-Mei Guo
Summary: This paper proposes a quantitative analysis method for corrosion products based on terahertz spectroscopy. Mixture samples of three major corrosion products (magnetite, hematite, and goethite) at 51 different concentrations were prepared. The refractive index spectra measured by terahertz time-domain spectroscopy were projected to a 2D score diagram using principal component analysis. The established model based on the Euclidean distances between mixtures and pure analyte on the diagram can accurately predict the concentration of magnetite, which is crucial for assessing the stability of the corrosion system.
Article
Physics, Applied
Chia-Jung Yang, Jingwen Li, Jannis Lehmann, Nives Strkalj, Morgan Trassin, Manfred Fiebig, Shovon Pal
Summary: In this study, THz quarter-wave plates (QWPs) made from (110)-cut and (001)-cut DyScO3 (DSO) crystals are presented, showing their behavior as QWPs over specific frequency ranges. The complex refractive indices and birefringence of DSO crystals along the in-plane axes were examined, with a phase tolerance of +/- 3%.
APPLIED PHYSICS LETTERS
(2021)
Article
Optics
Thomas Gretzinger, Krunal Radhanpura, Philip Fairman, Mark Berman, David Farrant
Summary: Terahertz radiation combines spectroscopy and imaging to reveal concealed objects and identify materials. A compact fiber-coupled hyperspectral imaging reflection system is developed for security and industrial applications. The system can measure objects up to 150 mm in diameter with a depth range of up to 255 mm, allowing for 3-dimensional mapping and simultaneous acquisition of spectral data. Spectral information between 0.2-1.8 THz is extracted from a hyperspectral image to identify specific materials in different humidity environments.
Article
Optics
Wen Guan, Xiaoyu Liao, Ziping Li, Wenjian Wan, Kang Zhou, Yiran Zhao, Chenjie Wang, Xuhong Ma, Shumin Wang, J. C. Cao, Dong Xu, Junwen Zhang, Nan Chi, Hua Li
Summary: In this study, a laser beating experiment was conducted to investigate the frequency tuning characteristics of terahertz quantum cascade lasers induced by temperature or drive current. The experimental results revealed that the frequency tuning coefficients of terahertz QCL are 6.1 MHz/0.1 K (temperature tuning) and 2.7 MHz/mA (current tuning) within the investigated ranges, showing potential applications in high precision linewidth measurements and multi-channel terahertz communications.
Article
Chemistry, Analytical
Bjorn Hubschmann Molvig, Thorsten Baek, Jie Ji, Peter Boggild, Simon Jappe Lange, Peter Uhd Jepsen
Summary: We present a novel integrated THz system for spectroscopy in the 0.1-1.4 THz range. The system utilizes photomixing antenna for THz generation and photoconductive antenna for THz detection. We compare the performance of our system with a femtosecond-based THz time-domain spectroscopy system for mapping and imaging of large-area graphene.
Article
Environmental Sciences
Lei Feng, Weikang Wu, Junmin Wang, Chu Zhang, Yiying Zhao, Susu Zhu, Yong He
Article
Biochemistry & Molecular Biology
Di Wu, Liuwei Meng, Liang Yang, Jingyu Wang, Xiaping Fu, Xiaoqiang Du, Shaojia Li, Yong He, Lingxia Huang
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2019)
Article
Biochemistry & Molecular Biology
Yong He, Shupei Xiao, Tao Dong, Pengcheng Nie
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2019)
Article
Biochemistry & Molecular Biology
Shupei Xiao, Yong He
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2019)
Article
Computer Science, Information Systems
Yong He, Hong Zeng, Yangyang Fan, Shuaisheng Ji, Jianjian Wu
MOBILE INFORMATION SYSTEMS
(2019)
Article
Biochemistry & Molecular Biology
Yunfeng Chen, Yue Chen, Xuping Feng, Xufeng Yang, Jinnuo Zhang, Zhengjun Qiu, Yong He
Article
Biochemistry & Molecular Biology
Shupei Xiao, Yong He
Article
Chemistry, Analytical
Qiwei Guo, Yayong Chen, Yu Tang, Jiajun Zhuang, Yong He, Chaojun Hou, Xuan Chu, Zhenyu Zhong, Shaoming Luo
Article
Environmental Sciences
Alwaseela Abdalla, Haiyan Cen, Elfatih Abdel-Rahman, Liang Wan, Yong He
Article
Chemistry, Multidisciplinary
Zhiqi Hong, Yong He
APPLIED SCIENCES-BASEL
(2020)
Article
Chemistry, Multidisciplinary
Han Guo, Jun Zhou, Fei Liu, Yong He, He Huang, Hongyan Wang
APPLIED SCIENCES-BASEL
(2020)
Article
Food Science & Technology
Qinlin Xiao, Xiulin Bai, Yong He
Article
Food Science & Technology
Yong He, Yiying Zhao, Chu Zhang, Yijian Li, Yidan Bao, Fei Liu
Article
Biochemistry & Molecular Biology
Xiulin Bai, Qinlin Xiao, Lei Zhou, Yu Tang, Yong He
Article
Chemistry, Multidisciplinary
Xiulin Bai, Chu Zhang, Qinlin Xiao, Yong He, Yidan Bao