Article
Chemistry, Physical
Mohan Wang, Ying Zhang, Changhui Chen, Chunxi Zhang, Junguang Jiang, Yuxiang Weng
Summary: In photosynthesis, the protein-bound oxygen-evolving center (OEC) undergoes multiple oxidation-state transitions in light-driven reactions; a synthetic OEC mimic capable of four redox transitions has been synthesized; electrochemical and spectroscopic studies reveal structural differences between the synthetic complex and the native OEC.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Review
Plant Sciences
Yang Chen, Boran Xu, Ruoqing Yao, Changhui Chen, Chunxi Zhang
Summary: The oxygen-evolving center in photosystem II plays a crucial role in the water splitting reaction of artificial photosynthesis. However, the lack of a precise chemical model has hindered the understanding of its structure-function relationship. Recent advances in synthesizing artificial clusters that closely mimic the oxygen-evolving center have provided an opportunity to study its structure-function relationship and design efficient catalysts for water splitting in artificial photosynthesis.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Optics
Jeremy Xuan Yu Chew, Zi Heng Lim, Y. Qi, Guangcan Zhou, Guangya Zhou
Summary: Infrared devices are increasingly used in various applications. This paper introduces a novel dispersive spectrometer that has high-throughput and decoupled spectral resolution. The proposed spectrometer utilizes a two-stage Hadamard transform encoding process to increase the signal-to-noise ratio. With a single-pixel detector, the system can be easily implemented in other desired wavelengths. Additionally, a method is developed to remove the need for uniform illumination and improve the ease of device design for in situ measurement.
Article
Biochemistry & Molecular Biology
Maria Teresa Caccamo, Salvatore Magazu
Summary: The aim of this study is to investigate the hydration properties of glucose and its hydrogen bond network in glucose-water mixtures. The temperature behavior of these mixtures was characterized using Fourier Transform InfraRed (FTIR) spectroscopy, specifically by analyzing the intramolecular OH stretching mode in the spectral range of 3000-3700 cm(-1) through the evaluation of Spectral Distance (SD). The results obtained were consistent with literature data, showing a maximum strength of the hydrogen bond network at a specific concentration value.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Applied
Leandro da Rocha Novaes, Argimiro Resende Secchi, Vera Maria Martins Salim, Neuman Solange de Resende
Summary: This study explores the relationship between feed properties, operating conditions, and deactivation phenomenon during middle distillates hydroprocessing. An accelerated deactivation methodology was employed to study this phenomenon. The results show that 100 hours of operation is needed for the initial deactivation during the stabilization step. Easy and portable tools, such as Fourier Transform Infrared analysis and density measurements, were successfully used to monitor and evaluate the hydrotreating process. It was also found that feedstock properties can directly influence the deactivation phenomenon, and process modifications can be identified using Fourier Transform Infrared analysis.
Article
Spectroscopy
Shun-hui Yu, Hong-ping Deng, Bo Zhang, Zheng-xue Liu, Jun-jie Lin, Li Sheng, Jie Pan, Lianqi Huang, Jun-sheng Qi
Summary: This paper investigates the physiological response of Vetiveria zizanioides seedlings to excess cadmium stress, focusing on the changes in chemical contents in the root, stem, and leaf. The study uses Fourier transform infrared spectroscopy to analyze the plant's response and accumulation of cadmium. The results show that Vetiveria zizanioides utilizes osmosis and organic acids to improve cadmium tolerance, and the spectroscopy technique is a non-invasive and rapid method for monitoring heavy metal stress in plants.
SPECTROSCOPY LETTERS
(2022)
Article
Environmental Sciences
Cristopher Dominguez-Hernandez, Cristina Villanova-Solano, Marta Sevillano-Gonzalez, Cintia Hernandez-Sanchez, Javier Gonzalez-Salamo, Cecilia Ortega-Zamora, Francisco Javier Diaz-Pena, Javier Hernandez-Borges
Summary: Partial evaporation and solidification of plastic materials, mainly microplastics, onto coastal rocks can form a new solid structure called plastitar. These formations have been found in several islands of the Canary Islands archipelago and can permanently attach to the rock, occupying a significant portion of the sampled area. The plastitar primarily consists of tar and polyethylene, with microplastics in the form of fragments, pellets, and lines. The increasing presence of plastics, particularly microplastics, in coastal environments may lead to the common occurrence of these new plastic formations, which require further investigation on their long-term effects on coastlines.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Le Thi Thu Hien, Anne Gobin, Duong Thi Lim, Dang Tran Quan, Nguyen Thi Hue, Nguyen Ngoc Thang, Nguyen Thanh Binh, Vu Thi Kim Dung, Pham Ha Linh
Summary: Soil salinity has a significant impact on agricultural production, especially in low-lying coastal areas where saltwater intrusion is a growing concern. Monitoring salinity is challenging due to the influence of soil moisture on the soil's spectral signature. The study found that Fourier-transform infrared spectroscopy can be used to map salt-affected soils, particularly in inaccessible areas. Advancements in thermal satellite sensors may provide possibilities for monitoring soil salinity in the future.
Article
Electrochemistry
Longsheng Wu, Jingping Hu, Sijing Chen, Xiaorong Yang, Lu Liu, John S. Foord, Paulius Pobedinskas, Ken Haenen, Huijie Hou, Jiakuan Yang
Summary: A stable solid electrolyte interphase (SEI) is crucial for the cyclic stability and Coulombic efficiency (CE) of lithium-sulfur (Li-S) batteries. This study reveals the mechanism of LiNO3 additive in mediating the dynamic evolution of SEI on a lithium anode surface using in situ Fourier transform infrared (FTIR) spectroscopy and ab initio molecular dynamics (AIMD). LiNO3 accelerates the reduction of LiTFSI, forming a compact and stable SEI, which hinders the decomposition of LiTFSI and the solvent during lithium deposition stripping, leading to higher CE and long-term cyclic stability.
ELECTROCHIMICA ACTA
(2023)
Article
Environmental Sciences
Weiqian Jia, Aleksandra Karapetrova, Mengjun Zhang, Libo Xu, Kang Li, Muke Huang, Jie Wang, Yi Huang
Summary: This study combined laser direct in-frared (LDIR) and Fourier-transform infrared (FTIR) methods to investigate microplastics in agricultural soils. The results showed that microplastics were present in high abundance, with particles ranging from 10 to 500μm accounting for the majority. Polyethylene, polypropylene, and polyvinyl chloride were the dominant polymer types. Reclaimed water from sewage treatment plants, drip irrigation utilities, and residual plastic film were identified as potential sources. The study also highlighted the underestimation of microplastic contamination in agricultural soils using visual counting methods.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Josef Brandt, Franziska Fischer, Elisavet Kanaki, Kristina Enders, Matthias Labrenz, Dieter Fischer
Summary: Analyzing the environmental occurrence of MP particles has received significant attention in the past decade, with a focus on effective risk assessment through accurate sampling and analysis methods. The choice of subsampling methods is crucial for reducing MP particle count errors, and increasing the fraction of MP particles in samples can help achieve lower errors.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2021)
Article
Chemistry, Physical
Buyang Yu, Lan Chen, Zhengkang Qu, Chunfeng Zhang, Zhengyuan Qin, Xiaoyong Wang, Min Xiao
Summary: The study demonstrates the presence of a phonon bottleneck effect in CsPbI3 nanocrystals through broadband two-dimensional electronic spectroscopy, showing a size-dependent relaxation of hot carriers and doubling of their lifetime as the nanocrystal size decreases. This finding suggests the feasibility of controlling hot carrier dynamics in perovskite semiconductors for potential applications.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Review
Instruments & Instrumentation
Bijay Ratna Shakya, Pragya Shrestha, Hanna-Riikka Teppo, Lassi Rieppo
Summary: FTIR spectroscopy has shown potential in skin cancer research, especially for analyzing different types of skin cancers. Although the usefulness of FTIR spectroscopy in skin cancer research has been demonstrated, further research and promotion are needed to establish it as a routine method in the field.
APPLIED SPECTROSCOPY REVIEWS
(2021)
Article
Spectroscopy
Xiaorong Yang, Xin Wei, Kai Yu, Changwu Wan, Yuanhe Wang, Shimei Huang, Qinru Sun, Jiang Huang
Summary: This study successfully identified myocardial fibrosis and established a prediction model using ATR-FTIR spectroscopy combined with chemometrics, demonstrating high sensitivity and specificity.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Review
Instruments & Instrumentation
Karel Kotaska, Julia Werle, Bozena Hosnedlova, Rene Kizek, Richard Prusa
Summary: This review highlights the use of Fourier-transform infrared (FTIR) spectrometry in the management of urolithiasis. By determining the composition of urinary stones, current therapies can be assessed and rare stones can be identified.
APPLIED SPECTROSCOPY REVIEWS
(2022)
Article
Biochemistry & Molecular Biology
Tomomi Kitajima-Ihara, Takehiro Suzuki, Shin Nakamura, Yuichiro Shimoda, Ryo Nagao, Naoshi Dohmae, Takumi Noguchi
BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS
(2020)
Article
Chemistry, Physical
Ryo Nagao, Makio Yokono, Yoshifumi Ueno, Jian-Ren Shen, Seiji Akimoto
JOURNAL OF PHYSICAL CHEMISTRY B
(2020)
Article
Chemistry, Physical
Yuichiro Shimada, Tomomi Kitajima-Ihara, Ryo Nagao, Takumi Noguchi
JOURNAL OF PHYSICAL CHEMISTRY B
(2020)
Article
Chemistry, Physical
Ryo Nagao, Makio Yokono, Yoshifumi Ueno, Tian-Yi Jiang, Jian-Ren Shen, Seiji Akimoto
JOURNAL OF PHYSICAL CHEMISTRY B
(2020)
Article
Plant Sciences
Kumiko Oka, Yoshifumi Ueno, Makio Yokono, Jian-Ren Shen, Ryo Nagao, Seiji Akimoto
PHOTOSYNTHESIS RESEARCH
(2020)
Article
Plant Sciences
Seiji Akimoto, Yoshifumi Ueno, Makio Yokono, Jian-Ren Shen, Ryo Nagao
PHOTOSYNTHESIS RESEARCH
(2020)
Article
Plant Sciences
Ryo Nagao, Yoshifumi Ueno, Seiji Akimoto, Jian-Ren Shen
PHOTOSYNTHESIS RESEARCH
(2020)
Article
Plant Sciences
Miyuki Tanabe, Yoshifumi Ueno, Makio Yokono, Jian-Ren Shen, Ryo Nagao, Seiji Akimoto
PHOTOSYNTHESIS RESEARCH
(2020)
Article
Multidisciplinary Sciences
Koji Kato, Toshiyuki Shinoda, Ryo Nagao, Seiji Akimoto, Takehiro Suzuki, Naoshi Dohmae, Min Chen, Suleyman I. Allakhverdiev, Jian-Ren Shen, Fusamichi Akita, Naoyuki Miyazaki, Tatsuya Tomo
NATURE COMMUNICATIONS
(2020)
Article
Biochemistry & Molecular Biology
Ryo Nagao, Makio Yokono, Yoshifumi Ueno, Takehiro Suzuki, Koji Kato, Ka-Ho Kato, Naoki Tsuboshita, Tian-Yi Jiang, Naoshi Dohmae, Jian-Ren Shen, Shigeki Ehira, Seiji Akimoto
Summary: IsiAs are proteins expressed in cyanobacteria under iron-deficient conditions, surrounding the photosystem I trimer with a ring formation. The study found that the PSI-IsiA1 supercomplex is present in the wild-type under iron-replete conditions, while IsiA2 and IsiA3 bind to PSI monomer in the ΔisiA1 mutant under iron-deficient conditions. These findings provide insights into the multiple-expression system of the IsiA family in this cyanobacterium.
BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS
(2021)
Article
Biochemistry & Molecular Biology
Ryo Nagao, Makio Yokono, Yoshifumi Ueno, Ka-Ho Kato, Naoki Tsuboshita, Jian-Ren Shen, Seiji Akimoto
Summary: Photosynthetic organisms have evolved various light-harvesting complexes (LHCs) to efficiently collect solar energy and occupy ecological niches. This study investigated the biochemical and spectroscopic properties of fucoxanthin chlorophyll a/c-binding protein (FCP) complexes from Glossomastix chrysoplasta, revealing differences in fluorescence response of FCP under different pH conditions, particularly alterations in energy-transfer pathways under basic pH conditions. These findings provide new insights into pH-dependent energy-transfer and energy-quenching mechanisms in FCP and photosynthetic LHCs.
BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS
(2021)
Article
Biochemistry & Molecular Biology
Ryo Nagao, Makio Yokono, Yoshifumi Ueno, Takehiro Suzuki, Minoru Kumazawa, Ka-Ho Kato, Naoki Tsuboshita, Naoshi Dohmae, Kentaro Ifuku, Jian-Ren Shen, Seiji Akimoto
Summary: Photosynthetic organisms adjust pigment composition and molecular oligomerization of light-harvesting complexes in response to solar light intensities to enhance light-harvesting efficiency. This study investigated the excitation-energy dynamics and relaxation of FCP complexes isolated from a diatom grown under high-light conditions, revealing differences in subunit composition, oligomeric states, absorption and fluorescence spectra, as well as fluorescence decay-associated spectra between high-light and low-light conditions. Shorter lifetime components and alterations of energy-transfer pathways were observed in FCP complexes under high-light conditions, providing insights into the dynamic regulation mechanisms of FCPs in diatoms under excess-light conditions.
BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS
(2021)
Article
Biochemistry & Molecular Biology
Keisuke Kawakami, Ryo Nagao, Yuhei O. Tahara, Tasuku Hamaguchi, Takehiro Suzuki, Naoshi Dohmae, Daisuke Kosumi, Jian-Ren Shen, Makoto Miyata, Koji Yonekura, Nobuo Kamiya
Summary: The overall structure of the PBS complex isolated from the cyanobacterium Thermosynechococcus vulcanus was determined using negative-staining electron microscopy. The PBS complex showed a hemidiscoidal structure with APC cores and peripheral PC rods. Comparison with PBS structures from other organisms revealed structural characteristics specific to T. vulcanus.
BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS
(2021)
Article
Chemistry, Physical
Yasutada Okamoto, Yuichiro Shimada, Ryo Nagao, Takumi Noguchi
Summary: The S-2 -> S-3 transition, involving water delivery and proton release through the O1 and Cl channels, respectively, is a key step in the process of photosynthetic water oxidation. Mutations such as D1-N298A and substitutions like NO3- for Cl- were found to impact the kinetics of this transition. These results highlight the importance of water and proton transfer pathways in the S-2 -> S-3 transition.
JOURNAL OF PHYSICAL CHEMISTRY B
(2021)
Article
Plant Sciences
Ryo Nagao, Makio Yokono, Ka-Ho Kato, Yoshifumi Ueno, Jian-Ren Shen, Seiji Akimoto
Summary: Photosynthetic organisms, such as the green flagellate Euglena gracilis, adjust their pigment compositions and energy transfer processes to deal with excess energy under high-light conditions. The study found that in Euglena cells exposed to high-light, there was suppression of excitation-energy transfer and rapid energy quenching, indicating modification of excitation-energy-relaxation processes in addition to pigment compositions for photoprotection strategies.
PHOTOSYNTHESIS RESEARCH
(2021)
