bluuebunny/crossref_metadata_2025_split huggingface dataset:
Rapid Aminations of Functionalized Aryl Fluorosulfates in Water
Authors: Iyer Karthik S. , Dismuke Rodriguez Kylee B. , Lammert Robert M. , Yirak Jordan R. , Saunders John M. , Kavthe Rahul D. , Aue Donald H. , Lipshutz Bruce H. 
Published: July 2024

AbstractAryl fluorosulfates of varying complexities have been used in amination reactions in water using a new Pd oxidative addition complex (OAC‐1) developed specifically to match the needs of the fine chemicals industry, not only in terms of functional group tolerance, but also reflecting time considerations associated with these important C−N couplings. Also especially noteworthy is that they replace both PFAS‐related triflates and nonaflates, which are today out of favor due to recent government regulations. The new complex based on the BippyPhos ligand is used at low loadings and under aqueous micellar conditions. Moreover, it is easily prepared and stable to long term storage. DFT calculations on the OAC precatalyst compare well with the X‐ray structure of the crystals with π‐complexation to the aromatic system of the ligand and also confirm the NMR data showing a mixture of conformers in solution that differ from the X‐ray structure in rotation of the phenyl and t‐butyl ligand substituents. An extensive variety of coupling partners, including pharmaceutically relevant APIs, readily participate under mild and environmentally responsible reaction conditions.
Peperomia pellucida (L.) Kunth suppresses glycation‐induced inflammatory response in human retinal pigment epithelial cell line ARPE‐19 via JAK‐STAT3 signaling
Authors: Ho Keat Lam , Yong Phaik Har , Lim Siew Huah , Ng Zhi Xiang 
Published: July 2024

AbstractThe formation of advanced glycation end product (AGE) is a risk factor for diabetic retinopathy. Since the current treatment for diabetic retinopathy is accompanied by side effects, preliminary findings have suggested Peperomia pellucida (L.) Kunth as a potential alternative therapeutic option for diabetic retinopathy. This study aimed to elucidate the anti‐inflammatory mechanism of P. pellucida in the AGE‐stimulated human retinal pigment epithelial cell line ARPE‐19. Phytochemical analysis revealed phenylpronanoids, terpenes, and fatty acids in P. pellucida. Through in vitro cell viability assay, the P. pellucida methanolic extract (IC50 = 8.70 mg/mL) and ethyl acetate fraction (IC50 = 7.34 mg/mL) were considered as non toxic for ARPE‐19. AGE induced an inflammatory response in ARPE‐19 by upregulating the gene (2.4–5.8‐fold) and protein (1.4–2.3‐fold) expression of signal transducer and activator of transcription 3 (STAT3), interleukin‐8 (IL‐8), monocyte chemoattractant protein‐1, matrix metalloproteinase 2, and vascular endothelial growth factor. At 1.5 mg/mL, P. pellucida methanolic extract suppressed IL‐8 expression (p < 0.05), implying its anti‐inflammatory action at the early inflammatory stage through the Janus kinase (JAK)‐STAT3 pathway. The methanolic extract also restored the ARPE‐19 viability under AGE‐induced inflammatory stress. The downregulation of inflammatory biomarkers along the JAK‐STAT3 pathway suggested P. pellucida as a promising anti‐inflammatory source for diabetic retinopathy.
Ethanediamine Intercalation Induced Hydrogen Bond Network in Vanadium Oxide for Ultralong‐Life Aqueous Ammonium Ion Batteries
Authors: Lu Tzu‐Hao , Liu Qiyu , He Jinjun , Liu Hao , Yu Yanxia , Wang Yi , Lu Xihong 
Published: July 2024

AbstractAqueous ammonium‐ion batteries (AAIBs) have received tremendous attention as a potential energy technology, but their development is severely challenged by the fact that the as‐reported electrode materials are usually unable to meet the requirements of high capacity and high stability simultaneously. Herein, an organic‐inorganic hybrid material of ethanediamine (EDA) intercalated vanadium oxide (VO‐EDA) is synthesized as a high‐performance anode material for AAIBs. The intercalated EDA molecules not only act as an electron donor to bind with NH4+, but also form hydrogen bonding network structures with vanadium oxides to facilitate charge/ion transfer. As a result, this hybrid material provides a high specific capacity of 104.4 mAh g−1 at 0.5 A g−1 and good cycling stability after 5000 cycles 10 A g−1 with a coulombic efficiency of ~100 %. Moreover, the ammonium‐ion full cell based on VO‐EDA anode and NiHCF cathode achieves a specific capacity of 55 mAh g−1 at 0.1 A g−1 and impressive cycling stability with 88.6 % capacity retention after 10000 cycles at 5 A g−1.
In‐situ biological biogas upgrading using upflow anaerobic polyfoam bioreactor: Operational and biological aspects
Authors: Baransi‐Karkaby Katie , Yanuka‐Golub Keren , Hassanin Mahdi , Massalha Nedal , Sabbah Isam 
Published: July 2024

AbstractA high rate upflow anaerobic polyfoam‐based bioreactor (UAPB) was developed for lab‐scale in‐situ biogas upgrading by H2 injection. The reactor, with a volume of 440 mL, was fed with synthetic wastewater at an organic loading rate (OLR) of 3.5 g COD/L·day and a hydraulic retention time (HRT) of 7.33 h. The use of a porous diffuser, alongside high gas recirculation, led to a higher H2 liquid mass transfer, and subsequently to a better uptake for high CH4 content of 56% (starting from 26%). Our attempts to optimize both operational parameters (H2 flow rate and gas recirculation ratio, which is the total flow rate of recirculated gas over the total outlet of gas flow rate) were not initially successful, however, at a very high recirculation ratio (32) and flow rate (54 mL/h), a significant improvement of the hydrogen consumption was achieved. These operational conditions have in turn driven the methanogenic community toward the dominance of Methanosaetaceae, which out‐competed Methanosarcinaceae. Nevertheless, highly stable methane production rates of 1.4–1.9 L CH4/Lreactor.day were observed despite the methanogenic turnover. During the different applied operational conditions, the bacterial community was especially impacted, resulting in substantial shifts of taxonomic groups. Notably, Aeromonadaceae was the only bacterial group positively correlated with increasing hydrogen consumption rates. The capacity of Aeromonadaceae to extracellularly donate electrons suggests that direct interspecies electron transfer (DIET) enhanced biogas upgrading. Overall, the proposed innovative biological in‐situ biogas upgrading technology using the UAPB configuration shows promising results for stable, simple, and effective biological biogas upgrading.
Resistance from generation to generation: The Saturday Mothers in Istanbul
Authors: Kaya Orhan , Acar Yasemin Gülsüm , Agar Celal Cahit , Neville Fergus 
Published: July 2024

AbstractThe Saturday Mothers (Cumartesi Anneleri) are a group that has gathered in Istanbul for a 30‐min sit‐in every Saturday since 1995 seeking justice for forced disappearances and political murders in Turkey. What started with a group of approximately 30 mainly family and close relatives of those who disappeared has grown to include thousands of participants. The initial protests were composed predominantly of mothers of victims, but over the past 28 years other relatives, including children, have joined the vigils. In many cases, those children then continue to participate and join the social movement. We are particularly interested in the Saturday Mothers' ability to sustain participation in weekly collective action, including the ways in which intergenerational transmission shapes and encourages this action. Semi‐structured interviews were conducted with 19 members of the Saturday Mothers. Analysis of participants' narratives and experiences included three main themes: family as a model, shared experiences, and functions of the movement. Findings highlight the complex interplay between familial influences, collective memory, and the formation of the Saturday Mothers' identity.
Chemical Profile, Antibacterial Activity and Antioxidant Activity of Bark Volatile Oil of Terminalia arjuna
Authors: Rauf Mahd , Intisar Azeem , Manzoor Sobia , Qaisar Uzma , Bano Shehar , Ahmed Ejaz , Mutahir Zeeshan , Ul Ain Noor 
Published: July 2024

AbstractTerminalia arjuna is an evergreen medicinal plant that belongs to the Combretaceae family of flowering plants. The bark of the plant exhibits antiviral, anticancer, hypocholesterolemic, antioxidant and antimicrobial properties. In this study, composition antibacterial activity, antioxidant activity and cytotoxicity of bark oil of Terminalia arjuna(Roxb.) were reported. Oils were extracted by microwave assisted hydrodistillation where an oil yield of 0.18 % was obtained followed by the identification of 35 compounds by gas chromatography mass spectrometry. The most abundant volatiles were furfural (11.11 %), isoeugenol (9.99 %), p‐ethylguaiacol (9.97 %), α‐cadinol (9.57 %), and estragole (9.47 %). The oil was further evaluated against ten different drug resistant strains where oil showed significant activity against all pathogens and the highest activity was found against Acinetobacter baumannii(22 mm), Klebsiella pneumoniae (22 mm) and Staphylococcus aureus(22 mm) in a concentration‐dependent manner. Antioxidant activity evaluation demonstrated 68 % radical scavenging activity by the volatile oil as compared to 81 % of the standard, ascorbic acid at a concentration of 1000 μg. Cytotoxicity studies were conducted to see the effect of sample on the expression level of a housekeeping gene, Glyceraldehyde 3‐phosphate dehydrogenase where it did not affect the normal transcription of the gene.
Biosynthesis of Arcyriaflavin F from Streptomyces venezuelae ATCC 10712
Authors: Lai Hung‐En , Kennedy Agata , Tanner Lewis , Bartram Emma A. , Mei Chee Soo , Freemont Paul S. , Moore Simon J. 
Published: July 2024

AbstractIndolocarbazoles are natural products with a broad spectrum of bioactivity. A distinct feature of indolocarbazole biosynthesis is the modification of the indole and maleimide rings by regioselective tailoring enzymes. Here, we study a new indolocarbazole variant, which is encoded by the acfXODCP genes from Streptomyces venezuelae ATCC 10712. We characterise the pathway by expressing the acfXODCP genes in Streptomyces coelicolor, which led to the production of a C‐5/C‐5’‐dihydroxylated indolocarbazole, which we assign as arcyriaflavin F. We also show that a flavin‐dependent monooxygenase AcfX catalyses the C‐5/C‐5’ dihydroxylation of the unsubstituted arcyriaflavin A into arcyriaflavin F. Interestingly, AcfX shares homology to EspX from erdasporine A biosynthesis, which instead catalyses a single C‐6 indolocarbazole hydroxylation. In summary, we report a new indolocarbazole biosynthetic pathway and a regioselective C‐5 indole ring tailoring enzyme AcfX.
Bailout subintimal trans‐catheter withdrawal (STRAW) technique for a distally extended coronary hematoma
Authors: Tadano Yutaka , Sugie Takuro , Kanno Daitaro , Fujita Tsutomu 
Published: July 2024

AbstractA coronary hematoma, which can sometimes obstruct coronary flow, may be left behind after tip‐detection antegrade dissection and reentry. We present a novel bailout technique utilizing subintimal trans‐catheter withdrawal technique with the assistance of a stent and a balloon. This technique can be used before performing bailout long stenting or a fenestration procedure with a cutting balloon, which are standard treatments for hematoma, to improve impaired coronary flow caused by a distally extended hematoma.
Maximizing CO2 Reduction Efficiency: Surface‐Regulated Highly Porous Ag‐Cu Alloy Aerogel Inserted With Multi‐Wall Carbon Nanotube Achieving Nearly Complete CO Selectivity
Authors: Wang Junyan , Soo‐Hyun Park Jennifer , Imam Ahmer , Yu Zixin , Fang Zehao , Noroozifar Meissam , Kraatz Heinz‐Bernhard 
Published: July 2024

AbstractThe electrochemical reduction of CO2 (eCO2RR) holds promise in mitigating atmospheric greenhouse gas levels but is hindered by low reaction kinetics, high energy barriers, and poor selectivity. To address these challenges, we developed a novel series of cost‐effective AgCu‐containing metal‐aerogel catalysts with high electrochemical surface areas (ECSA) using a top‐down reduction approach. The Ag85Cu15 aerogel, with an ECSA of 27.41 cm2, achieved a Faraday efficiency (FE%) of 89.3 % for CO production at −0.9 V vs. RHE. Increasing the Cu content to over 50 % in the aerogel matrix produced small amounts of C2H4, with a maximum FE% of 12.9 % at −1.0 V vs. RHE. To further enhance CO2 reduction efficiency, multi‐walled carbon nanotubes (CNT) were incorporated into the Ag85Cu15 alloy aerogel via a hydrothermal treatment. The highly dispersed CNTs within the aerogel matrix increased the ECSA to 57.00 cm2 by forming a well‐defined porous structure through van‐der Waals interactions, improving CO selectivity, and achieving a FE% of 98.6 % at −0.7 V vs. RHE and a partial current density of 9.6 mA/cm2 in an H‐cell. 86 % of the initial FECO% was maintained during an 18 h test with continuous electrolysis.
Iodine‐Catalyzed Carbonyl‐Alkyne Metathesis Reactions
Authors: Arndt Thiemo , Breugst Martin 
Published: July 2024

AbstractThe reaction between aldehydes or ketones and alkynes—the carbonyl‐alkyne metathesis—constitutes a very useful strategy for the synthesis of α,β‐unsaturated carbonyls. We now demonstrate that iodine is a highly efficient catalyst for both the intra‐ and intermolecular metathesis reaction in very small concentrations (0.1–1 mol %). Our protocol outperforms other catalytic systems, is operationally very simple, cheap, metal‐free, and tolerates a large variety of functional groups (e. g., −CN, −CO2Me, −Br, −OH) at very low catalyst loadings. We can furthermore show that iodine‐catalyzed carbonyl‐alkyne metatheses can be combined with other iodine‐catalyzed reactions in one‐pot procedures to afford larger and more complex molecular structures. Finally, our mechanistic studies indicate that the iodonium ion is the active catalyst under the reaction conditions.
Stimuli‐Responsive Interconversion between Poly‐NHC‐Based Organometallic Assemblies and Their Self‐Aggregated Dimers
Authors: Jin Guang‐Feng , Han Ying‐Feng 
Published: July 2024

Comprehensive SummaryPoly‐NHC‐based organometallic assemblies 3‐PF6, 3‐SbF6 and 3‐OTf were obtained and verified by NMR spectroscopy, ESI mass spectrometry and single‐crystal X‐ray diffraction analyses. Controllable structural interconversion was observed between the poly‐NHC‐based organometallic assemblies and their self‐aggregated dimers in solution affected by concentration, solvent and metal ion. 1H NMR spectra of assembly 3‐PF6 in CD3CN at different concentrations demonstrated controllable structural interconversion, and 19F NMR spectrum of assembly 3‐PF6 at high concentration further evidenced the presence of the free hexafluorophosphate anion and encapsulated hexafluorophosphate anion for its two sets of signals. In addition, single‐crystal X‐ray diffraction analysis provided clear evidence that in the solid state, two assemblies 3‐PF6 were vertically stuck, forming a self‐aggregated dimer with an encapsulated hexafluorophosphate anion. Investigating the reversible structural interconversion is beneficial for revealing the intrinsic nature on the atom level and paving the way to design the stimuli‐responsive functional system.
Porous N‐Doped Carbon‐encapsulated Iron as Novel Catalyst Architecture for the Electrocatalytic Hydrogenation of Benzaldehyde
Authors: Pota Filippo , Costa de Oliveira Maida A. , Schröder Christian , Brunet Cabré Marc , Nolan Hugo , Rafferty Aran , Jeannin Olivier , Camerel Franck , Behan James A. , Barrière Frédéric , Colavita Paula E. 
Published: July 2024

AbstractCarbon porous materials containing nitrogen functionalities and encapsulated iron‐based active sites have been suggested as electrocatalysts for energy conversion, however their applications to the hydrogenation of organic substrates via electrocatalytic hydrogenation (ECH) remain unexplored. Herein, we report on a Fe@C:N material synthesized with an adapted annealing procedure and tested as electrocatalyst for the hydrogenation of benzaldehyde. Using different concentrations of the organic, and electrolysis coupled to gas chromatography experiments, we demonstrate that it is possible to use such architectures for the ECH of unsaturated organics. Potential control experiments show that ECH faradaic efficiencies >70 % are possible in acid electrolytes, while maintaining selectivity for the alcohol over the pinacol dimerization product. Estimates of product formation rates and turnover frequency (TOF) values suggest that these carbon‐encapsulated architectures can achieve competitive performance in acid electrolytes relative to both base and precious metal electrodes.
Water‐Based Recycling Process of FTO/SnO2 Substrate for Sustainable Perovskite Solar Cell Technology
Authors: Gunasekara Pivini , Chiu Wei‐Hsun , Senanayeke Saveen , Yang Yang , Tam Hoang Minh , Sonar Prashant , O'Mullane Anthony P. , Wang Hongxia 
Published: July 2024

AbstractFluorine‐doped tin oxide (FTO) substrate is an important and expensive component in perovskite solar cells (PSCs), which accounts for up to 40 % of a typical PSC raw material cost. In this study, we investigated the recyclability of SnO2/FTO in PSCs by washing the spent PSCs using different solvent such as dimethylformamide (DMF), dimethylsulfoxide (DMSO), acetone, water, and acetone/water mixture. Characterisation of properties of the SnO2/FTO substrates recovered from the PSC show the surface wettability of SnO2/FTO is largely unchanged with water washing while a higher hydrophobicity is obtained with organic solvent washing. Comparison of electronic properties of the SnO2/FTO substrate shows a downward shift of the conduction band by 180 meV with water washing, creating favourable energy alignment with adjacent perovskite for efficient interfacial charge injection. Consequently, PSCs using the water‐based recycled SnO2/FTO substrates produced a high power conversion efficiency (PCE) of 19.33 % which is comparable to the device using fresh SnO2/FTO substrate (PCE=19.85 %). Furthermore, we demonstrated that the water washing process could retain property of SnO2/FTO substrate for decent PSC performance up to four recycling cycles. This study opens new avenues towards recycling of valuable FTO substrates in PSCs for increased sustainability and cost‐effectiveness.
Photoinduced Lignin Cα−Cβ Bond Cleavage and Chemodivergent Functionalization via Iron Catalysis
Authors: Li Yi , Wu Simeng , Liu Yongqian , He Zhiyang , Li Wei , Li Shujun , Chen Zhijun , Liu Shouxin , Tian Bing 
Published: July 2024

AbstractThe photocatalytic conversion of lignin into value‐added chemicals especially those functionalized molecules represent one of the most important strategies for sustainable and environmental‐friendly development. Cleavage of C−C bonds in lignin under mild photocatalytic conditions for refining lignin into useful molecules is meaningful but challenging. Meanwhile, the assembly of diverse functional groups into active lignin fragments during the depolymerization is of great challenging. Herein, using cheap iron catalysts under visible light irradiation, the highly selective and efficient cleavage of Cα−Cβ bond in lignin is realized via ligand‐to‐metal charge transfer (LMCT) and hydrogen atom transfer (HAT) processes. The subsequent divergent functionalization of generated lignin fragment‐based radical intermediates enables an efficient formation of diverse functionalized molecules. This method is also effective for cleavage of Cα−Cβ bond in native lignin, yielding two identified benzaldehyde monomers in a total yield of 8.7 wt %.
Opportunity and Challenge of Advanced Porous Sorbents for PFAS Removal
Authors: Lai Zhuozhi , Zhou Yaolu , Bai Shanshan , Sun Qi 
Published: July 2024

AbstractPer‐ and polyfluoroalkyl substances (PFASs), comprising over 9,000 persistent synthetic organic contaminants, are extensively found in the environment and pose significant risks to both human and ecological health. Among the strategies for addressing PFAS contamination, adsorption processes have proven to be cost‐effective. Traditional sorbents such as ion‐exchange resins and activated carbon have been found to exhibit low adsorption capacities and slow equilibration times. Recent innovations in porous materials, including metal‐organic frameworks (MOFs), covalent organic frameworks (COFs), and porous organic polymers (POPs), however, offer significant improvements in the efficiency of PFAS adsorption. This review thoroughly examines the latest advancements in these materials, analyzing their mechanisms of adsorption, and concludes by suggesting directions for future research that could further enhance their effectiveness in PFAS management.
Distortion‐less video wireless transmission in 5G new radio using delay‐distortion‐rate optimization (DDRO)
Authors: Maheswari K. , Padmaja Nimmagadda 
Published: July 2024

SummaryIn this paper, a novel strategy of video communication over a 5G platform of new radio (NR) is developed, and it is named ViNR. With the support of optimization on the ViNR quality of service (QoS) system design, we stretched the outdated R‐D optimization to a novel delay‐distortion‐rate optimization (DDRO) control method. The entire model is partitioned with two types of coding: source coding and channel coding. For source coding, we affianced the inter‐frame prediction method of independent predicted frames (IPPPP) with Lagrange multiplier optimization. Channel coding is intricate with the minimization of delay‐distortion and getting the most out of the rate using resource allocation optimization in terms of sub‐slice allocation. To perform this sub‐slice resource assignment with optimization of DDR, the isolation resource allocation is premeditated in this work to ensure the service level profile of various groups of resource slots or grids dealing with the subject of middling delay and rate. The widespread simulation results divulge that the proposed algorithm NR‐DDRO achieves better QoS parameters of delay, distortion, and rate with the metrics of end‐to‐end distortion, encoding Y‐PSNR, encoding bit rate, encoding time, end‐to‐end PSNR, optimization time, and complete computation time.