bluuebunny/crossref_metadata_2025_split huggingface dataset:
Synthesis of ZnO Nanoparticles with Antibacterial Properties Using Terminalia catappa Leaf Extract
Authors: Azimpanah Razieh , Solati Zahra , Hashemi Majid 
Published: January 2022

AbstractIn order to develop alternative drugs against resistant pathogens, capped ZnO nanoparticles (NPs) were prepared using Terminalia catappa leaf extract. By changes in pH and aging time, cauliflower‐like, sheet‐like, and hierarchical morphologies for ZnO NPs were obtained. Their antibacterial activities against Staphylococcus aureus and Escherichia coli were investigated. The results demonstrated that the green synthesized ZnO NPs exhibit higher antibacterial activity than chemically prepared ZnO NPs. The antibacterial activity of hierarchical ZnO NPs was greater than that of the other morphologies, which was attributed to the higher oxygen vacancy in ZnO NPs leading to enhanced reactive oxygen species (ROS) generation. The mechanism of the formation of ZnO nanocrystals was also discussed.
Cross‐talk Between (Hydrogen)Sulfite and Metalloproteins: Impact on Human Health
Authors: Maiti Biplab K 
Published: January 2022

AbstractSulfite is a potent toxic substance causing harm to multi‐organ in human. Despite toxicity, it is widely used as preservative, anti‐browning and anti‐oxidant in foods, beverages, and pharmaceuticals, which cause easy admission of sulfite in human. Sulfite is also produced endogenously during the catabolism of cysteine and methionine. In vivo, the serum sulfite level at physiological range is strictly maintained by a molybdenum dependent sulfite oxidase (SO), which catalyzes sulfite to sulfate oxidation via a two‐electron oxidation pathway. The loss of SO activity causes high serum sulfite level that fosters several diseases, including asthma, neurological dysfunction, birth defects, and heart diseases. The cytotoxicity of (bi)sulfite is implicated as sulfite radicals, which are generated by mainly heme‐peroxidases via a one‐electron oxidation pathway. On the other hand, the toxic sulfite radicals are neutralized to sulfite by heme‐globins. The enzymatic reduction of sulfite to sulfide is catalyzed by sulfite reductase, which contains an unusual metal cofactor, siroheme‐[4Fe4S]‐cluster. Overall, the interaction of sulfite with various metalloproteins in vivo is a close relation with human health. Therefore, this review describes the metabolic conversion of (bi)sulfite to sulfate, sulfite radical or sulfide via oxidation or reduction pathways by various metalloproteins (specially SOs, peroxidases, heme‐globins, and sulfite reductases), and the potential applications of sulfite in biosensors/biofuel cells, anti‐browning, and advance oxidation process.
Strengthening of the C−F Bond in Fumaryl Fluoride with Superacids
Authors: Bayer Marie C. , Kremser Christoph , Jessen Christoph , Nitzer Alexander , Kornath Andreas J. 
Published: January 2022

AbstractThe reaction of fumaryl fluoride with the superacidic solutions XF/MF5 (X=H, D; M=As, Sb) results in the formation of the monoprotonated and diprotonated species, dependent on the stoichiometric ratio of the Lewis acid to fumaryl fluoride. The salts [C4H3F2O2]+[MF6]− (M=As, Sb) and [C4H2X2F2O2]2+([MF6]−)2 (X=H, D; M=As, Sb) are the first examples with a protonated acyl fluoride moiety. They were characterized by low‐temperature vibrational spectroscopy. Low‐temperature NMR spectroscopy and single‐crystal X‐ray structure analyses were carried out for [C4H3F2O2]+[SbF6]− as well as for [C4H4F2O2]2+([MF6]−)2 (M=As, Sb). The experimental results are discussed together with quantum chemical calculations of the cations [C4H4F2O2 ⋅ 2 HF]2+ and [C4H3F2O2 ⋅ HF]+ at the B3LYP/aug‐cc‐pVTZ level of theory. In addition, electrostatic potential (ESP) maps combined with natural population analysis (NPA) charges were calculated in order to investigate the electron distribution and the charge‐related properties of the diprotonated species. The C−F bond lengths in the protonated dication are considerably reduced on account of the +R effect.
Engaging Yne‐Allenes in Cycloaddition Reactions: Recent Developments
Authors: Wang Jia‐Yin , Hao Wen‐Juan , Tu Shu‐Jiang , Jiang Bo 
Published: January 2022

Comprehensive SummaryYne‐allenes bearing both a C—C triple bond and an allene unit are a class of focal substrates in organic synthesis, in view of their structure diversity, high reactivity and intermediate variety in the past years. Engaging yne‐allenes in numerous annulation cascades provides efficient and direct accesses to elaborate functionalized polycyclic molecular architectures in a convergent manner. There are lots of types of catalytic chemical reactions such as intramolecular cyclizations, cycloisomerizations, intermolecular annulations, and bicyclizations as well as tricyclizations with the assistance of Lewis acids, Brønsted acids, bases, transition metals, and other catalysts. This review provides an overview of the chemistry developed with transformations of yne‐allenes by discussing their general and specific reactivities, presenting and commenting on their mechanisms as well as their applications.
Unravelling the Structural Development of Peptide‐Coordinated Iron‐Sulfur Clusters: Prebiotic Evolution and Biosynthetic Strategies
Authors: Dong Yijun , Zhang Siqi , Zhao Liang 
Published: January 2022

Comprehensive SummaryIron‐sulfur (Fe‐S) proteins are among the most common type of natural metalloproteins that participate in a large range of key metabolic processes. To date, enormous research works on the exploration of protein structures and catalytic mechanisms have revealed that the active sites are generally composed of a Fe‐S cluster and a highly conserved coordination environment. Accordingly, people are enlightened by the prebiotic evolution of ancient clusters and are dedicated to the development of biosynthetic methods for modern clusters. This review aims to systemically summarize the structural development of peptide‐coordinated iron‐sulfur clusters from two perspectives: “bottom‐up” approaches involving evolution of prebiotic chemical synthesis for natural proteins and “top‐down” analyses of biosynthesis in modern biological systems for artificial metalloproteins. Moreover, current challenges and the direction of future development are also presented to provide new perspectives of developing enzyme mimics and further mechanistic studies.
Desorption Electrospray Ionization Mass Spectrometry Assay for Label‐Free Characterization of SULT2B1b Enzyme Kinetics
Authors: Kulathunga Samadhi C. , Morato Nicolás M. , Zhou Qing , Cooks R. Graham , Mesecar Andrew D. 
Published: January 2022

AbstractThe sulfotransferase (SULT) 2B1b, which catalyzes the sulfonation of 3β‐hydroxysteroids, has been identified as a potential target for prostate cancer treatment. However, a major limitation for SULT2B1b‐targeted drug discovery is the lack of robust assays compatible with high‐throughput screening and inconsistency in reported kinetic data. For this reason, we developed a novel label‐free assay based on high‐throughput (>1 Hz) desorption electrospray ionization mass spectrometry (DESI‐MS) for the direct quantitation of the sulfoconjugated product (CV<10 %; <1 ng analyte). The performance of this DESI‐based assay was compared against a new fluorometric coupled‐enzyme method that we also developed. Both methodologies provided consistent kinetic data for the reaction of SULT2B1b with its major substrates, indicating the affinity trend pregnenolone>DHEA>cholesterol, for both the phospho‐mimetic and wild‐type SULT2B1b forms. The novel DESI‐MS assay developed here is likely generalizable to other drug discovery efforts and is particularly promising for identification of SULT2B1b inhibitors with potential as prostate cancer therapeutics.
Hydrogen Bonding‐Based Layer‐by‐Layer Assembly of Nature‐Derived Eggshell Membrane Hydrolysates and Coffee Melanoidins in Single‐Cell Nanoencapsulation
Authors: Han Sang Yeong , Yun Gyeongwon , Nguyen Duc Tai , Kang Eunhye K. , Lee Hojae , Kim Seulbi , Kim Beom Jin , Park Ji Hun , Choi Insung S. 
Published: January 2022

AbstractSingle‐cell nanoencapsulation (SCNE), a chemical strategy for sustaining the structure and functions of viable cells, strictly requires, for creation of cell‐in‐shell structures, materials that are extremely compatible with chemically labile cells. In this study, we propose the utilization of eggshell membrane hydrolysates (ESMHs) and coffee melanoidins (CMs) derived from food waste—eggshells and spent coffee grounds, respectively—as layer‐by‐layer (LbL) components. Hydrogen bonding‐based LbL construction of nanoshells on Saccharomyces cerevisiae proves greatly biocompatible, not harming the cells (viability > 99%). The ESMH/CM films are durable in a wide range of pH values and effectively protect the encapsulated cells from lethal heavy metals (Cd2+, Cu2+, and Zn2+) and UV‐B irradiation. The Fe3+‐mediated shell cross‐linking augments the ESMH/CM shell's durability and cytoprotectability. The natural ESMHs and CMs will add to the biomaterial arsenal for a multitude of applications that involve the interfacing of living cells and materials.
Generalized TAP Free Energy
Authors: Chen Wei‐Kuo , Panchenko Dmitry , Subag Eliran 
Published: January 2022

AbstractWe consider the mixed p‐spin mean‐field spin glass model with Ising spins and investigate its free energy in the spirit of the TAP approach, named after Thouless, Anderson, and Palmer [67]. More precisely, we define and compute the generalized TAP correction, and establish the corresponding generalized TAP representation for the free energy. In connection with physicists’ replica theory, we introduce the notion of generalized TAP states, which are the maximizers of the generalized TAP free energy, and show that their order parameters match the order parameter of the ancestor states in the Parisi ansatz. We compute the critical point equations of the TAP free energy that generalize the classical TAP equations for pure states. Furthermore, we give an exact description of the region where the generalized TAP correction is replica symmetric, in which case it coincides with the classical TAP correction, and show that Plefka's condition is necessary for this to happen. In particular, our result shows that the generalized TAP correction is not always replica symmetric on the points corresponding to the Edwards‐Anderson parameter. © 2022 Wiley Periodicals LLC.
Corporate social responsibility performance evaluation from the perspective of stakeholder heterogeneity based on fuzzy analytical hierarchy process integrated TOPSIS
Authors: Yi Liqi , Li Tao , Wang Xiangyi , Ge Gentana , Zhang Ting 
Published: January 2022

AbstractThe effective evaluation of corporate social responsibility (CSR) performance is the basis for stakeholders to understand the level of CSR fulfillment, which is further conducive to the sustainable development of society. Due to the heterogeneity of stakeholders, different stakeholders usually have different emphasis on CSR. However, the previous studies on CSR performance evaluation have neglected the different preferences of stakeholders for CSR, and fails to deeply analyze the risk and potential of CSR. In order to solve the above problems, an internal type‐2 trapezoidal fuzzy numbers (IT2TrFN)—analytical hierarchy process based TOPSIS evaluation framework is established in this paper which considering the heterogeneity of stakeholders in the fuzzy environment. Following that, via the comparative analysis of specific‐stakeholder and overall‐stakeholder, the underlying risk and potential of CSR for different stakeholders are identified for the first time. In addition, this paper conducts empirically research on the CSR of Chinese listed companies in 2017–2018 from the perspective of six types of enterprise stakeholders. Finally, this article enriches the existing CSR evaluation method and theory.
Political embeddedness and the adoption of environmental management practices: The mediating effects of institutional pressures
Authors: Nguyen Hang Thu , Vu Tra Thi Dan , Nguyen Hiep Manh , Troege Michael 
Published: January 2022

AbstractWe examine the effect of political embeddedness on environmental management practices and identify different channels for this relationship. We find that politically embedded firms are less exposed to coercive pressure, but have higher normative and mimetic pressures to engage in environmental management. Additionally, normative and mimetic pressures are higher for firms operating in a more competitive market, whereas oligopolistic firms are subject to higher coercive pressure. Our findings support both legitimacy theory which argues that political embeddedness shields firms from environmental regulations, as well as control‐based theories arguing that politically embedded firms should perform better in environmental management. We also demonstrate that market‐based incentives are especially important to induce politically embedded firms to adopt environmental practices when regulatory pressure does not work well.
Verbascoside enhances radiosensitivity of hepatocellular carcinoma cells through regulating miR‐101‐3p/Wee1 axis
Authors: Sun Lin , Cai Huangxing , Zhou Tengchao , Xiang Hua , Long Lin 
Published: January 2022

AbstractVerbascoside is a kind of phenylpropanoid glycoside derived from multiple medicinal plants, exerting anti‐tumor effects in diverse human malignancies. However, the function of Verbascoside on the radiosensitivity of hepatocellular carcinoma (HCC) cells remains unknown. Human Huh7 and HepG2 cell lines were treated with Verbascosideis, and cell viability was detected with cell counting kit‐8 (CCK‐8) assay. Quantitative real‐time polymerase chain reaction (qRT‐PCR) was applied to detect miR‐101‐3p expression, and Western blot was used to quantify the expression of WEE1 G2 checkpoint kinase (WEE1). Then, CCK‐8 and flow cytometry assays were used to detect the proliferation and apoptosis of HCC cells after Verbascoside and X‐ray combined treatment, and the expressions of WEE1 and apoptosis‐related proteins Bax and Bcl‐2 were detected by Western blot. Verbascoside could improve the radiosensitivity of HCC cells in a dose‐dependent manner. Verbascoside increased the expression of miR‐101‐3p but reduced WEE1 expression in HCC cells. Additionally, WEE1 was identified as a target of miR‐101‐3p. MiR‐101‐3p inhibition or WEE1 overexpression could reverse the effect of Verbascoside on the viability and apoptosis of HCC cells. Verbascoside increases the radiosensitivity of hepatocellular carcinoma cells via modulating miR‐101‐3p/WEE1 axis.
Oligodendrocytes and myelin: Active players in neurodegenerative brains?
Authors: Chen Jing‐Fei , Wang Fei , Huang Nan‐Xing , Xiao Lan , Mei Feng 
Published: January 2022

AbstractOligodendrocytes (OLs) are a major type of glial cells in the central nervous system that generate multiple myelin sheaths to wrap axons. Myelin ensures fast and efficient propagation of action potentials along axons and supports neurons with nourishment. The decay of OLs and myelin has been implicated in age‐related neurodegenerative diseases and these changes are generally considered as an inevitable result of neuron loss and axon degeneration. Noticeably, OLs and myelin undergo dynamic changes in healthy adult brains, that is, newly formed OLs are continuously added throughout life from the differentiation of oligodendrocyte precursor cells (OPCs) and the pre‐existing myelin sheaths may undergo degeneration or remodeling. Increasing evidence has shown that changes in OLs and myelin are present in the early stages of neurodegenerative diseases, and even prior to significant neuronal loss and functional deficits. More importantly, oligodendroglia‐specific manipulation, by either deletion of the disease gene or enhancement of myelin renewal, can alleviate functional impairments in neurodegenerative animal models. These findings underscore the possibility that OLs and myelin are not passively but actively involved in neurodegenerative diseases and may play an important role in modulating neuronal function and survival. In this review, we summarize recent work characterizing by OLs and myelin changes in both healthy and neurodegenerative brains and discuss the potential of targeting oligodendroglial cells in treating neurodegenerative diseases.
P is for persistence: Soil phosphorus remains elevated for more than a decade after old field restoration
Authors: Parkhurst Tina , Standish Rachel J. , Prober Suzanne M. 
Published: January 2022

AbstractUnderstanding constraints to ecological restoration on former agricultural land has become increasingly important due to agricultural land degradation in the developed world, and growing evidence for enduring agricultural legacies that limit native species recovery. In particular, the removal of native plant biomass and subsequent disturbance of soil properties through farming activities can alter soil ecosystem processes. Planting of native plant species is a common approach to restoring native vegetation on agricultural land and is assumed to benefit soil ecosystem processes, but the degree to which altered soil chemical processes recover is poorly documented. We investigated recovery of soil chemical properties after restoration in semiarid Western Australia, hypothesizing that elevated nutrient concentrations would gradually decline post planting, but available phosphorus (P) concentrations would remain higher than reference conditions. We used a space‐for‐time substitution approach, comparing 10 planted old field plots with matched fallow cropland and reference woodlands. Sampling on planted old fields and reference woodland plots was stratified into open patches and under tree canopy to account for consistent differences between these areas. The most prominent legacy of cropping was significantly and substantially higher concentrations of soil available P in fallow croplands and restored old fields compared with reference woodlands. Soil mineral nitrogen (N) concentrations were elevated in fallow croplands compared to open patches in reference woodlands (ammonium and nitrate) and under the tree canopy (ammonium). However, in restored old fields, mineral N concentrations were similar to woodland sites, providing evidence for amelioration over time. No significant differences in nutrient concentrations under tree canopies compared with open patches had developed in the planted old fields, despite a distinction between open patches and he under ttree canopy in reference woodlands for total N. We conclude that soil P legacies in old fields may inhibit the recolonization of native species that are sensitive to, or uncompetitive at, elevated P concentrations. To achieve full recovery, further research is required to test restoration practices aimed at reducing soil P concentrations to facilitate native plant establishment and persistence.
Patterns of thermal adaptation in a globally distributed plant pathogen: Local diversity and plasticity reveal two‐tier dynamics
Authors: Boixel Anne‐Lise , Chelle Michaël , Suffert Frédéric 
Published: January 2022

AbstractPlant pathogen populations inhabit patchy environments with contrasting, variable thermal conditions. We investigated the diversity of thermal responses in populations sampled over contrasting spatiotemporal scales, to improve our understanding of their dynamics of adaptation to local conditions. Samples of natural populations of the wheat pathogen Zymoseptoria tritici were collected from sites within the Euro‐Mediterranean region subject to a broad range of climatic conditions. We tested for local adaptation, by accounting for the diversity of responses at the individual and population levels on the basis of key thermal performance curve parameters and “thermotype” (groups of individuals with similar thermal responses) composition. The characterization of phenotypic responses and genotypic structure revealed the following: (i) a high degree of individual plasticity and variation in sensitivity to temperature conditions across spatiotemporal scales and populations; and (ii) geographic variation in thermal response among populations, with major alterations due to seasonal patterns over the wheat‐growing season. The seasonal shifts in functional composition suggest that populations are locally structured by selection, contributing to adaptation patterns. Further studies combining selection experiments and modeling are required to determine how functional group selection drives population dynamics and adaptive potential in response to thermal heterogeneity.
CYP1A expression in freshwater fish of western New York as an indicator of pollution levels
Authors: Williams Rebecca , Taggart Theresa , Ganger Kayla , Koetsier Teri , Johnson Seema , Dinchman Amber 
Published: January 2022

AbstractVarious species of freshwater fish regulate the expression of certain proteins in response to environmental contamination. Previous research has shown that CYP1A expression increases in response to contaminant levels and can result in increased tumor formation. Fish in contaminated environments would thus benefit by downregulating the expression of CYP1A to reduce tumor prevalence as an adaptive strategy. Alternatively, monitoring of the CYP1A protein in fish can serve as a bioindicator of the pollution level of an environment. This study evaluated CYP1A expression in twelve different species of freshwater fish from seven bodies of water throughout western NY including Cuba Lake, Genesee River, Hanging Bog, Love Canal, Moss Lake, Rushford Lake, and Tifft Nature Preserve. Western blot analysis was used to measure CYP1A expression as a marker of site pollution and potential fish population adaptation. It was hypothesized that low CYP1A expression at a site with known contamination would suggest signs of adaptation to pollution levels present. Furthermore, if at least one sample from a species showed CYP1A expression, then the CYP1A antibody (Caymen Chemical, USA; 173132) had compatibility with that species, eliminating falsely suspected adaptation. The results from this study suggest possible adaptation of fish may be occurring in the polluted Tifft Nature Preserve and Genesee River. In contrast, CYP1A expression in fish from Cuba Lake, Hanging Bog, Love Canal, Moss Lake, and Rushford Lake appear to represent known pollution levels and adaptation is not likely occurring. Results from this study are preliminary and next steps include collection and analysis of sediment to provide a stronger correlation between pollution at sites and CYP1A expression.