Although weak intermolecular interactions are the essence of most processes of key importance in medicine, industry, environment, and life cycles, their characterization is still not sufficient. Enzymatic dehalogenations that involve chloride anion interaction within a host-guest framework is one of the many examples. Recently published experimental results on host-guest systems provided us with models suitable to assess isotopic consequences of these noncovalent interactions. Herein, we report the influence of environmental and structural variations on chlorine isotope effects. We show that these effects, although small, may obscure mechanistic interpretations, as well as analytical protocols of dehalogenation processes.
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http://dx.doi.org/10.1021/acs.jpcb.0c10691 | DOI Listing |
J Am Chem Soc
December 2024
Department of Chemistry and Center for Emerging Material and Advanced Devices, National Taiwan University, Taipei 106319, Taiwan (R.O.C.).
Reactive carbonyl species (RCS) are important biomarkers of oxidative stress-related diseases because of their highly reactive electrophilic nature. Despite their potential as triggers for prodrug activation, selective labeling approaches for RCS remain limited. Here, we utilized triphenylphosphonium groups to chemoselectively capture RCS via an aqueous Wittig reaction, forming α,β-unsaturated carbonyls that enable further functionalization.
View Article and Find Full Text PDFProbl Radiac Med Radiobiol
December 2024
State Institution «National Research Center for Radiation Medicine of the National Academy of Medical Sciences of Ukraine», 53 Yuriia Illienka Str., Kyiv, 04050, Ukraine.
Objective: to study the features of cognitive disorders in the remote period following exposure to ionizing radiation (IR) in the elderly participants of the liquidation of the consequences of the Chornobyl NPP accident (Chornobyl clean-up workers) with chronic cerebrovascular disorders.
Materials And Methods: The retrospective and prospective cohort study with the external and internal controlgroups. The randomized sample of the male elderly participants (attained age more than 60 years old) in liquidationof the consequences of the accident (Chornobyl clean-up workers, liquidators) at the Chornobyl nuclear power plant(ChNPP) in 1986-1987 (main group, n = 52) recruited from the Clinico-epidemiological registry (CER) of StateInstitution «National Research Center for Radiation Medicine, Hematology and Oncology of The National Academyof Medical Sciences of Ukraine» (NRCRMHO) with verified chronic cerebrovascular disorders (CVD) was examined.
Probl Radiac Med Radiobiol
December 2024
State Institution «National Research Center for Radiation Medicine, Hematology and Oncology of the National Academy of Medical Sciences of Ukraine», 53 Yuriia Illienka Str., Kyiv, 04050, Ukraine.
Objective: To assess the dynamics of changes in the number of deaths due to injury, poisoning and certain other consequences of external causes and their structure among liquidators of the accident at the Chornobyl NPP (PACL) on the basis of the data of Ukraine's State Register of Persons Affected by the Chornobyl Disaster (SRU) for 2000-2020.
Materials And Methods: The study used information resources of the Ministry of Health of Ukraine for 2000-2020 regarding deaths among the PACL - databases of the SRU as a basis for monitoring their health status. Depersonalised information was selected for 2000-2020 regarding 5,124 deaths from injury, poisoning and certain other consequences of external causes (ICD codes S00-T98) among the PACL, who were monitored in healthcare facilitiesof the Ministry of Health of Ukraine.
Sci Total Environ
December 2024
Department of Biology (DBI), State University of Maringá, Av. Colombo, 5790 - Zona 7, Maringá, PR 87020-900, Brazil; Graduate Program in Ecology of Inland Water Ecosystems (PEA), State University of Maringá (UEM), Av. Colombo, 5790 - Zona 7, Maringá, PR 87020-900, Brazil; Nucleus of Limnology, Ictiology and Aquaculture (NUPELIA) of State University of Maringá (UEM). Av. Colombo, 5790 - Zona 7, Maringá, PR 87020-900, Brazil; Graduate Program Comparate Biology (PGB), State University of Maringá (UEM), Av. Colombo, 5790 - Zona 7, Maringá, PR 87020-900, Brazil.
Floodplains function as global hotspots for the natural production of methane. Some of this methane can be oxidized by methanotrophic bacteria and assimilated into their biomass before reaching the atmosphere. Consequently, aquatic invertebrates that feed on methanotrophic bacteria may transfer methane-derived carbon to higher trophic levels in the aquatic food chain.
View Article and Find Full Text PDFWater Res
December 2024
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China. Electronic address:
Low temperature generally restricts biological activity, slowing down electron transfer in biogeochemical cycles and causing a series of environmental problems such as nitrogen pollution. We present a strategy to boost electron transfer in microbial cell at low temperatures via stimulation with low current. It is demonstrated by establishing a constructed wetland system coupled with solar powered microbial electrolysis cell, which enhances microbial activity through external micro currents (18.
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