Article
Oceanography
Juan Yu, Su Wang, Jing-Guang Lai, Ji-Yuan Tian, Hao-Quan Zhang, Gui-Peng Yang, Rong Chen
Summary: This study investigated the spatial distributions of DMS, DMSP, DLA, and the abundances of bacteria, DMSP-consuming bacteria, and dimethyl sulfoxide-consuming bacteria in the surface seawater of the Bohai Sea and Yellow Sea during autumn 2020. The results showed that the distributions of DMS and dissolved DMSP were significantly correlated with DLA. Grazing by microzooplankton promoted the conversion of DMSP to DMS, and mesozooplankton copepod grazing stimulated DMS production.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Biotechnology & Applied Microbiology
Pei-Feng Li, Pei-Pei Gao, Chun-Ying Liu, Hong-Hai Zhang, Gui-Peng Yang
Summary: Dimethyl sulfide (DMS) is an important trace gas transferred from the ocean to the atmosphere, produced by marine algae through the enzymatic cleavage of dimethylsulfoniopropionate (DMSP) yielding DMS and acrylic acid (AA). The production kinetics of DMS and AA from dissolved DMSP (DMSPd) in Prorocentrum minimum cultures varied during different growth stages, with DMS production following Michaelis-Menten kinetics and AA production showing a nearly linear fit. The ratios of DMS/AA and DMS/(DMSP + AA) were low, indicating a non-DMS-production pathway for DMSP degradation.
JOURNAL OF APPLIED PHYCOLOGY
(2022)
Article
Oceanography
Feng Xu, Hong-Hai Zhang, Teng Jia, Shi-Bo Yan, Jin-Wei Wu, Chun-Ying Liu, Gui-Peng Yang
Summary: Continuous input from the Changjiang River significantly reshuffled the ecosystems in the Changjiang Estuary and adjacent East China Sea, impacting the production, distribution, and emission of marine dimethyl sulfide (DMS). The effect of phytoplankton biomass and composition on DMS under different nutrient inputs remains poorly understood. Our findings indicate that changes in nutrient inputs will promote DMS emissions from the Changjiang Estuary.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Engineering, Aerospace
Gokhan Gurbuz
Summary: Water in all forms is crucial in meteorological activities, with water vapor playing a central role in climate and atmospheric studies. GPS offers a high temporal and spatial resolution alternative for collecting PWV data, while radiosonde observations provide mapping data at a lower resolution. The study examines seasonal PWV variations and validates GPS estimated PWV performance in Turkey.
ADVANCES IN SPACE RESEARCH
(2021)
Article
Environmental Sciences
Ki-Tae Park, Young Jun Yoon, Kitack Lee, Peter Tunved, Radovan Krejci, Johan Strom, Eunho Jang, Hyo Jin Kang, Sehyun Jang, Jiyeon Park, Bang Yong Lee, Rita Traversi, Silvia Becagli, Ove Hermansen
Summary: The study demonstrates the significant influence of DMS on the physiochemical properties of aerosol particles and CCN in the Arctic atmosphere, particularly during new particle formation and growth events. This finding provides new insights into the role of DMS in climate regulation.
GLOBAL BIOGEOCHEMICAL CYCLES
(2021)
Article
Environmental Sciences
Delaney B. Kilgour, Gordon A. Novak, Jon S. Sauer, Alexia N. Moore, Julie Dinasquet, Sarah Amiri, Emily B. Franklin, Kathryn Mayer, Margaux Winter, Clare K. Morris, Tyler Price, Francesca Malfatti, Daniel R. Crocker, Christopher Lee, Christopher D. Cappa, Allen H. Goldstein, Kimberly A. Prather, Timothy H. Bertram
Summary: The oxidation of dimethyl sulfide (DMS) emitted from the surface ocean contributes to cloud formation. This study investigates whether other sulfur-containing gases from marine sources also contribute to aerosol formation. The results show that DMS, methanethiol, and benzothiazole account for the majority of sulfur emissions, with non-DMS sulfur sources playing a significant role in the pre-bloom phase. The ratio of DMS to methanethiol emissions is influenced by bacterial sulfur demand and the availability of sulfur sources in seawater.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2022)
Article
Environmental Sciences
Robin Benard, Martine Lizotte, Maurice Levasseur, Michael Scarratt, Sonia Michaud, Michel Starr, Jean-Eric Tremblay, Ronald P. Kiene, Sohiko Kameyama
Summary: Experimental study on the impact of anthropogenic pH perturbation (ApHP) on DMS and DMSP concentrations revealed a reduction in microbial DMS yield, while microbial scavenging efficiency of dissolved DMSP remained unaffected. These findings suggest a potential link between ApHP and alterations in the microbial breakdown of DMSP, which could have implications for Earth's future climate.
ELEMENTA-SCIENCE OF THE ANTHROPOCENE
(2021)
Article
Chemistry, Multidisciplinary
Nuoxuan Wang, Shanshan Wang, Jinpei Yan, Miming Zhang
Summary: Oceanic short-lived trace gases, such as DMS and isoprene, have significant impacts on the exchange between the surface ocean and the lower atmosphere. A fully automatic measurement method for these gases is lacking, making data collection challenging. In this study, we enhanced our previous purge and trap system for measuring DMS and isoprene in air and seawater. The system demonstrated reliability and stability, with high linear correlations and low detection limits. The developed method successfully detected seawater and air samples and could be widely adopted in labs still using traditional low automatic purge and trap systems.
Article
Chemistry, Analytical
Jin-Wei Wu, Feng Xu, Long Liu, Mei-Hui Ren, Hong-Hai Zhang, Gui-Peng Yang
Summary: The study investigated the concentrations of DMS and DMSP in the East China Sea during summer and their contribution to atmospheric non-sea-salt sulfate. The results show that marine DMS release is an important factor in the East China Sea during summer and cannot be neglected.
ENVIRONMENTAL CHEMISTRY
(2021)
Article
Environmental Sciences
Jakub Kaizer, Michio Aoyama, Marek Bujdos, Raffaele Buompane, Jan Panik, Pavel P. Povinec, Ivan Sykora, Yutaka Tateda, Filippo Terrasi
Summary: The scientific interest in radiocesium and plutonium found in the oceans and seas has increased significantly due to the Fukushima Dai-ichi Nuclear Power Plant accident. This study processed and analyzed seawater samples collected from the North Pacific Ocean offshore Fukushima from 2011 to 2015 to determine their radiocesium activities and isotopic ratios of 134Cs/137Cs and 240Pu/239Pu. The results showed that the investigated region remained impacted by releases from the damaged power plant even after four years, and successful separation of plutonium from large volume seawater samples was confirmed.
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
(2022)
Article
Environmental Sciences
Yu Guo, Liying Peng, Zishi Liu, Xiaoting Fu, Guicheng Zhang, Ting Gu, Danyang Li, Jun Sun
Summary: This study investigated the seasonal distribution and key impact factors of DMS and DMSP in the Bohai Sea and North Yellow Sea using BAPI-PIMS technology. The results showed that temperature and specific phytoplankton species were the main influencing factors, with temperature and dinoflagellate abundance being dominant in summer, and diatom abundance and levels of phosphorus, nitrogen, and silicon in the environment being dominant in autumn.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Biochemical Research Methods
Bassam Lajin, Barbara Obermayer-Pietsch, Walter Goessler
Summary: In this study, an optimized analytical method for the direct determination of three compounds related to hydrogen sulfide metabolism in human urine without sample preparation was reported. The method was based on ion-pair ultra-high performance liquid chromatography (UHPLC) and detection by electrospray ionization tandem mass spectrometry (ESIMS/MS). The method showed rapid chromatographic separation and reliable detection limits.
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
(2022)
Article
Chemistry, Applied
Pei Yu, Yini Yang, Jinyuan Sun, Xiao Jia, Chang Zheng, Qi Zhou, Fenghong Huang
Summary: This study analyzed volatile sulfur-containing compounds (VSCs) in 21 cold-pressed rapeseed oils from different regions in China, finding that dimethyl sulfide (DMS) was the most significant aroma contributor. It confirmed S-methylmethionine (SMM) as a crucial precursor of DMS through analysis.
Article
Chemistry, Inorganic & Nuclear
Adish Tyagi, Gourab Karmakar, B. P. Mandal, Dipa Dutta Pathak, Amey Wadawale, G. Kedarnath, A. P. Srivastava, Vimal K. Jain
Summary: New air and moisture stable di-tert-butyltin complexes were prepared and used as single-source molecular precursors for the synthesis of orthorhombic SnS nanoplatelets. The resulting nanoplatelets showed promising performance as anode material for lithium ion batteries, with good cycling stability and rate capability.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Inorganic & Nuclear
Arjun Kafle, P. B. Armentrout
Summary: This study investigates the collision-induced dissociation of thorium oxide cation carbonyl complexes with xenon gas using a guided ion beam tandem mass spectrometer. The experimental and theoretical results are in good agreement, providing insights into the bond dissociation energies and molecular structures of the complexes.
INORGANIC CHEMISTRY
(2022)
Review
Chemistry, Analytical
Shin-Ichi Ohira, Kei Toda
Article
Chemistry, Analytical
Willy Cahya Nugraha, Haruka Nagai, Shin-Ichi Ohira, Kei Toda
ANALYTICAL SCIENCES
(2020)
Article
Chemistry, Analytical
Shin-Ichi Ohira, Tomomi Sakaki, Ryoma Miyachi, Aoi Otsubo, Asami Umemoto, Yoshihide Kuwahara, Kei Toda
Article
Chemistry, Analytical
Yumi Sugo, Ryoma Miyachi, Yo-hei Maruyama, Shin-Ichi Ohira, Masanobu Mori, Noriko S. Ishioka, Kei Toda
ANALYTICAL CHEMISTRY
(2020)
Article
Chemistry, Multidisciplinary
Kodai Abe, Koki Shimohira, Yusuke Miki, Yasuo Hirose, Shin-Ichi Ohira, Kei Toda
Article
Biology
Kylie Owen, Kentaro Saeki, Joseph D. Warren, Alessandro Bocconcelli, David N. Wiley, Shin-Ichi Ohira, Annette Bombosch, Kei Toda, Daniel P. Zitterbart
Summary: Finding prey is essential to marine predators' survival, and natural DMS concentrations are spatially correlated to zooplankton biomass. Agent simulations demonstrate that tracking fine-scale gradients of DMS leads zooplankton predators to areas with higher prey biomass efficiently.
COMMUNICATIONS BIOLOGY
(2021)
Article
Chemistry, Analytical
Shin-Ichi Ohira, Yuka Sato, Kazuki Horiuchi, Charles Phillip Shelor, Kei Toda
Summary: A fast response potentiometric flow-through pH sensor was used for organic acid determination with ammonia permeation device for baseline pH adjustment. By titrating the introduced organic acids, the pH response could be used for theoretical calculation of analyte concentrations. Real sample analysis showed good agreement between the present system and conventional BTB method.
ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Yumi Sugo, Ryoma Miyachi, Syohei Obata, Yo-hei Maruyama, Hinako Manabe, Masanobu Mori, Noriko S. Ishioka, Kei Toda, Shin-Ichi Ohira
Summary: Short-lived radioactive metals are important tracers in clinical diagnosis, and can be effectively separated using selective complex formation and cation-exchange adsorption. This method allows for rapid and efficient separation of radioactive metals from target metals, using a principle opposite to that of typical solid-phase extraction.
ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Kentaro Saeki, Kazuya Ikari, Hiroyuki Yokoi, Shin-Ichi Ohira, Hiroshi Okochi, Kei Toda
Summary: Diamines, including Dap and Put, are essential organic bases for plants and are emitted into the atmosphere. Analysis shows that amide derivatives of Dap and Put are found in higher concentrations in the atmosphere than their source diamine. These aminoamides are likely produced after the release of Dap and Put into the atmosphere. The concentrations of biogenic diamines and aminoamides vary throughout the day, with lower concentrations during sunny conditions, indicating photochemical decomposition. They readily bond with water vapor and sulfuric acid in the atmosphere and may play a role in the formation of particles and organic aerosols in the forest atmosphere.
ACS EARTH AND SPACE CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Yusuke Okazaki, Shigeyuki Hoshi, Toshimasa Kato, Takeo Fukui, Kei Toda, Shin-Ichi Ohira
Summary: This study investigates the electrodialytic enrichment of metal cations for monitoring ultra-pure water quality. A newly designed enrichment device is used to transfer metal ions to an acidic solution, improving the sensitivity of ICP-MS analysis. The use of dynamic gravimetric method for preparing standards avoids contamination from volumetric flasks.
Article
Chemistry, Multidisciplinary
Yumi Sugo, Shin-Ichi Ohira, Hinako Manabe, Yo-hei Maruyama, Naoaki Yamazaki, Ryoma Miyachi, Kei Toda, Noriko S. Ishioka, Masanobu Mori
Summary: A highly efficient separation method was developed to recover Cu-64 from the target material generated by proton beam irradiation. The method utilizes a flow electrolysis cell and chemical reaction separation technique to achieve separation and recovery of ultratrace radioisotopes.
Article
Chemistry, Multidisciplinary
Md Aminul Hague, Kei Toda, Shin-Ichi Ohire
Summary: This study presents a general purpose electrodialysis approach to produce highly pure ILs with a purity of greater than 99%. This method offers advantages over conventional methods by avoiding the use of hazardous solvents, eliminating purification processes, and preventing the generation of side products. Moreover, this membrane-based technology allows for the easy generation of various mixed ILs.
Article
Chemistry, Analytical
Maria Shichijo, Kazumasa Okamoto, Toru Takahashi, Miharu Nomura, Shin-ichi Ohira, Hitoshi Mizuguchi, Hideji Tanaka, Masaki Takeuchi
Summary: This paper proposes a feedback standard addition method coupled flow injection analysis, FB-SAM/FIA, for the rapid and accurate determination of trace interest in seawater samples. This approach significantly improves the sample throughput compared to the manual standard addition method. The FB-SAM/FIA technique successfully applied to the determination of NO2- in natural seawater samples.
MICROCHEMICAL JOURNAL
(2023)
Article
Environmental Sciences
Kunio Sakakibara, Misaki Taira, Kanako Nagatomi, Genki Kuriyama, Shin-Ichi Ohira, Kei Toda
Summary: In this study, an automated sampler/preconcentrator was developed to monitor variations in ortho- and para-NPs over time in the gas and particle phases separately. The study found that NPs were mostly present in the gas phase and concentrations increased at night. Additionally, 2-nitro-o-cresol was detected for the first time as one of the major NPs in winter.
ENVIRONMENTAL SCIENCE-ATMOSPHERES
(2022)
Article
Chemistry, Analytical
Misaki Taira, Kunio Sakakibara, Kentaro Saeki, Shin-Ichi Ohira, Kei Toda
ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
(2020)