bluuebunny/crossref_metadata_2025_split huggingface dataset:
Magnetic Relaxation by Quadrupole Interaction of Ionic Nuclei in Electrolyte Solutions Part II: Relaxation at Finite Ion Concentrations
Authors: Hertz H. G. 
Published: November 2023

AbstractGeneral expressions are given for the self‐correlation functions and two particle cross‐correlation functions regarding the electrical field gradient caused by the ions in the electrolyte solution. The important case of electrostatic field gradients (i.e. of point charges) is treated with particular emphasis. The quenching of quadrupole interactions due to ion cloud formation around a given ion is described. Modifications of the water‐water cross‐correlation function in the presence of ions and the ion‐water cross‐correlation functions are discussed. Fairly general formulae for the relaxation rate including special structural effects and contributions of electronic field gradients are derived.
Elektrochemische Oszillationsmethode zur Untersuchung der Diffusion von Wasserstoff in Metallen (Pd, Pd—Ag, Nb, Ta)
Authors: Boes N. , Westerboer U. , Züchner H. 
Published: November 2023

AbstractEs wird ein neues elektrochemisches Verfahren zur Untersuchung der Diffusion von Wasserstoff‐Isotopen in k.f.z.‐ und k.r.z.‐Metallen beschrieben. Dieses Verfahren, die elektrochemische Oszillationsmethode, ist aus den bewährten “Pulsmethoden” entwickelt worden. Dabei wird die Metallprobe so in den Regelkreis eines Potentiostaten geschaltet, daβ aufgrund des Diffusionswiderstandes und der Rückführung stationäre Relaxations‐Oszillationen des Potentials und damit der Wasserstoff‐Konzentration um einen vorgegebenen Sollwert entstehen. Es wird eine Lösung für dieses Diffusionsproblem gegeben, aus der sich der Zusammenhang zwischen dem Diffusionskoeffizienten D und der Schwingungsdauer τ der Oszillation ergibt: D = s2/1,778· τ.Die mit dieser Methode erhaltenen Ergebnisse für D werden mit den aus Pulsmethoden ermittelten verglichen.
Untersuchungen zur Reaktion von Wasserstoffatomen mit Äthanol und tert. Butanol
Authors: Aders W.‐K. , Wagner H. Gg. 
Published: November 2023

AbstractDie Reaktionen von H‐Atomen mit Äthanol und tert. Butanol wurden zwischen 295 und 700 K in einem isothermen Strömungssystem unter‐sucht. Stabile und instabile Reaktanden konnten bei Anwendung von Elektronenspin‐Resonanz, Massenspektroskopie und Gaschromato‐graphie mit hoher Empfindlichkeit nachgewiesen werden.Die Geschwindigkeitskonstante k1, des Elementarschrittes H + C2H5OH Produkte ergab sich in Arrhenius‐Darstellung zu k1 = (4,2 ± 0,4) 1012exp(‐4200 ± 300 cal·mol−1/RT) [cm3/mol sec]Als stabile Hauptprodukte der Umsetzung von Äthanol mit H‐Atomen wurden Methan, Äthan, Äthylen, Wasser und Acetaldehyd gebildet. Bei der Reaktion H + (CH3)3COH ergab sich die Geschwindigkeitskonstante des Einleitungsschrittes in Arrhenius‐Darstellung zu k1 = (4,0 ± 0,4)·1013 exp (‐8200 ± 600 cal·mol−1/RT) [cm3/mol sec].Als sauerstoffhaltiges Hauptprodukt konnte bei dieser Reaktion nur Wasser nachgewiesen werden. Mechanismen, die die beobachteten Produkte befriedigend erklären, werden diskutiert.
Development of heart organoid cryopreservation method through Fe3O4 nanoparticles based nanowarming system
Authors: Lee Seul‐Gi , Kim Jin , Seok Jin , Kim Min Woo , Rhee Jooeon , Song Gyeong‐Eun , Park Shinhye , Lee Suemin , Jeong Youngin , Chung Hyung Min , Kim C‐Yoon 
Published: November 2023

AbstractBeyond single cell two‐dimensional (2D) culture, research on organoids that can mimic human organs is rapidly developing. However, there are still problems in commercialization and joint research using organoids due to the lack of technology to safely store organoids. Since organoids are 3D complex structures with a certain size (0.1–5 mm) beyond the size of cells, the conventional cell‐level cryopreservation method using cryoprotectant (CPA) cannot overcome the damage caused by volume change due to osmotic pressure difference and ice nucleation. Herein, we attempted to solve such limitations by applying a nanowarming system using CPA with high cell permeability and Fe3O4 nanoparticles. By performing beat rate measurement, histological analysis, contractility analysis, and multi‐electrode array, it was verified that the developed method could significantly improve functional recovery and survival of heart organoids after freezing and thawing. In this study, we demonstrated a successful organoid cryopreservation method based on a Fe3O4 nanowarming system. The developed technology will provide clues to the field of tissue cryopreservation and spur the application of organoids.
The effect of green supply chain management practices on corporate environmental performance: Does supply chain competitive advantage matter?
Authors: Wiredu John , Yang Qian , Sampene Agyemang Kwasi , Gyamfi Bright Akwasi , Asongu Simplice A. 
Published: November 2023

AbstractThis paper examines the impact of institutional pressure (IP), top management support (TMS), green supply chain management practices (GSCM), and supply chain competitive advantage (SCCA) on corporate environmental performance (EP). We also analyze the mediation effect of GSCM on the interplay between TMS and EP. Additionally, the paper also provides an analysis of the moderating role of SCCA between IP and EP. To attain the objective of this research, we assembled data from 710 business entities within the Shaanxi province of China utilizing a survey design approach. The structural equation model (SEM) was applied to test and assess the hypothetical outline. The study outcomes empirically show that TMS, GSCM, and SCCA positively and significantly impact EP. Interestingly, our study found an insignificant association between IP and EP. The study's results also demonstrate that IP directly relates to top management support. Moreover, the study's empirical findings reveal that GSCM positively mediates IP and EP. The study findings show that SCCA shapes IP and EP's connection. Accordingly, the practical implications of our study's findings suggest that business managers, investors, and government agencies must know the importance of adopting sustainable practices within the supply chain. Business managers must take action to integrate environmental criteria into supplier selection, evaluate suppliers' EP, and collaborate with eco‐friendly suppliers. Hence, government agencies, stakeholders, and business managers can use this information to shape regulations and policies that encourage businesses to adopt sustainable supply chain practices. Offering incentives such as tax benefits or grants for sustainability initiatives can also promote adoption. The study recommends that a business culture that targets improving EP due to IP and top management support is essential in achieving GSCM practices, thereby promising competitive advantage.
Benzimidazolium Salts Bearing Nitrile Moieties: Synthesis, Enzyme Inhibition Profiling, and Molecular Docking Analysis for Carbonic Anhydrase and Acetylcholinesterase
Authors: Öner Erkan , Gök Yetkin , Demir Yeliz , Taskin‐Tok Tugba , Aktaş Aydın , Gülçin İlhami , Yalın Serap 
Published: November 2023

AbstractThis report presents the synthesis and characterization of a range of benzimidazolium salts featuring 3‐cyanopropyl groups on the 1st nitrogen atom and varied alkyl groups on the 3rd nitrogen atom within the benzimidazole structure. Benzimidazolium salts were synthesized by N‐alkylation of 1‐alkyl benzimidazole with 3‐cyanopropyl‐bromide. The new salts were characterized by 1H and 13C‐NMR, FT‐IR spectroscopic and elemental analysis techniques. In this study, the enzyme inhibition abilities of seven nitrile substituted benzimidazolium salts were investigated against acetylcholinesterase (AChE) and carbonic anhydrase isoenzymes I and II (hCA I and hCA II). They showed a highly potent inhibition effect on AChE, hCA I and hCA II (Ki values are in the range of 26.71–119.09 nM for AChE, 19.77 to 133.68 nM for hCA I and 13.09 to 266.38 nM for hCA II). Reflecting the binding mode of the synthesized cyanopropyl series, the importance of the 2,3,5,6‐tetramethylbenzyl, 3‐methylbenzyl and 3‐benzyl groups for optimal interactions with target proteins, evaluated by molecular docking studies. At the same time, the docking findings support the inhibition constants (Ki) values of the related compounds in this study. Potential compounds were also evaluated by their pharmacokinetic properties were predicted.
Endemic Mountain Tea (Sideritis dichotoma Huter): Antioxidant and Antibacterial Activities, Mineral Content by ICP‐MS and Phytochemical Content by LCHR‐MS
Authors: Öztürk Sarıkaya Sevim Beyza , Zehiroğlu Cuma 
Published: November 2023

AbstractEndemic Sideritis dichotoma Huter, herbal tea, is used for colds, coughs and digestive ailments. Since at least 25 % of the active ingredients of pharmacological drugs are obtained from plants, it is important to investigate many plants, both traditionally used and whose potential hasnt yet been discovered, before they disappear. When the results compared to other Sideritis species, it has better antioxidant activity in DPPH⋅ scavenging activity, Fe3+ and Cu2+ reducing capacity methods and is also rich in minerals, necessary for human body, K, Mg, Ca, P, S. Zone values (10–19,5 mm) obtained on S. aureus, P. aeruginosa, E. coli, S.enteritidis, E. faecalis, P. putida and K. pnemoniae strains are an indication that the plant has antibacterial activity. 27 secondary metabolites were identified by LC‐HRMS. Verbascoside, pharmacologically active compound known to have antitumor effect, cytotoxic selectivity and anticancer activity, is the most abundant phenolic in ethanol extract (49297.13 mg/kg).
The Wound‐Healing Potential of the Endemic Plant Helianthemum canum (L.) Baumg: Preclinical Studies Supported with Phytochemical Profiling
Authors: Küpeli Akkol Esra , Kosar Muberra , Baldemir Ayşe , Şeker Karatoprak Gökçe , Demirpolat Eren , Betul Yerer Aycan Mukerrem , Süntar Ipek , Ilgün Selen 
Published: November 2023

AbstractThe study‘s objective is to clarify the probable mechanisms underlying the wound‐healing properties of Helianthemum canum L. (Cistaceae), a traditional anti‐inflammatory and wound‐healing medicine. LC/MS‐MS was used to perform phytochemical analyses on a 70 % methanol extract of the plant‘s aerial parts. In vivo, linear incision and circular excision models were used to evaluate the wound healing activity. For anti‐inflammatory effect, in vivo acetic acid capillary permeability assay and in vitro Interleukin 1, Interleukin 6, and Interferon ɣ levels in LPS‐induced FR skin fibroblast cell line were also evaluated. The extract significantly improved wound healing in experimental models, with tensile strength values of 27.8 % and a contraction value of 35.09 %. Histopathological examinations, hydroxyproline estimation, hyaluronidase, collagenase, and elastase enzyme inhibitory assays confirmed wound healing potential. Inflammatory cytokines were significantly inhibited in the LPS‐induced FR cell line, with the highest effect seen on IL‐6 (34.5±2.12 pg/mL). This study offered the first concrete proof that H. canum can be used to treat wounds by suggesting that the myricetin and quinic acid content identified by LCMS‐MS analysis may be accountable for the effect of H. canum on wound contraction and hydroxyproline production.
Synergistic Antimicrobial Activity of Eugenol in Combination with Fosfomycin to Combat Escherichia coli and Potential Effect on Plasmid‐Mediated Fosfomycin Resistance Genes
Authors: Attaallah Ibrahim Ali , Kadhim Mohammed Rana 
Published: November 2023

AbstractThe presence of multidrug‐resistant pathogenic microorganisms makes it challenging to cure bacterial illnesses. Syzygium aromaticum has been used for medicinal purposes since ancient times. The objective of this study was to investigate the potential synergistic effect of the combination of Eugenol and Fosfomycin against clinically Uropathogenic Escherichia coli (UPEC) and their possible co‐treatment as well as their contribution to plasmid‐mediated Fosfomycin resistance (fosA3 and fosA4) genes using molecular assays. Eugenol was extracted from clove (Syzygium aromaticum) plants using steam distillation by Clevenger and analyzed by high‐performance liquid chromatography (HPLC). UPEC accounted for 63.6 % of all isolates. Specifically, 99.3 % of the UPEC isolates exhibited resistance to multiple types of antibiotics [multidrug‐resistant (MDR)]. The MIC for Eugenol was 1.25–5 μg/mL, and Fosfomycin was 512–1024 μg/mL, while the MBC for Eugenol was 5–10 μg/mL and Fosfomycin was 2048 μg/mL. The synergistic effects were considerable, with 1/4 MIC of Eugenol resulting in 1/8 MIC Fosfomycin. Eugenol inhibited most of the UPEC isolates at 4–8 hours, Fosfomycin at 8–12 hours, and co‐treatment at 4–8 hours. The fosA3 and fosA4 genes were detected in 5.7 % and 2.9 % of the isolates, respectively. The results showed variable gene expression changes in response to the different treatments.
Green corporate image: Assessing the effects of climate change management practices on corporate reputation
Authors: Khalid Fahad , Sun Juncheng , Guo Jiawei , Srivastava Mohit 
Published: November 2023

AbstractThe overarching aim of this study is to determine how distinct climate change management practices (CMPs), ranging from the establishment of carbon targets to the adoption of renewable energy and carbon assurance, resonate in the realm of corporate reputation (CR). The study sample comprises US S&P 500 companies (2016–2018). Reputation insights are obtained from the Global RepTrak® Pulse of the Reputation Institute, and data on the adoption of various CMPs are extracted from Carbon Disclosure Project reports. Logistic regression analysis shows that the findings underscore the pivotal role of absolute carbon and renewable energy use targets in enhancing CR. However, the effects of CMPs on CR vary with carbon trading regulations and intensive sector affiliation. The main findings hold after the Heckman selection model is used as an endogeneity technique. This research offers valuable insights to corporations that seek to strategically manage their reputation amidst the challenges of climate change.
Surpassing the Performance of Phenolate‐derived Ionic Liquids in CO2 Chemisorption by Harnessing the Robust Nature of Pyrazolonates
Authors: Qiu Liqi , Fu Yuqing , Yang Zhenzhen , Johnson Anna C. , Do‐Thanh Chi‐Linh , Thapaliya Bishnu P. , Mahurin Shannon M. , He Liang‐Nian , Jiang De‐en , Dai Sheng 
Published: November 2023

AbstractSuperbase‐derived ionic liquids (SILs) are promising sorbents to tackle the carbon challenge featured by tunable interaction strength with CO2 via structural engineering, particularly the oxygenate‐derived counterparts (e. g., phenolate). However, for the widely deployed phenolate‐derived SILs, unsolved stability issues severely limited their applications leading to unfavorable and diminished CO2 chemisorption performance caused by ylide formation‐involved side reactions and the phenolate‐quinone transformation via auto‐oxidation. In this work, robust pyrazolonate‐derived SILs possessing anti‐oxidation nature were developed by introducing aza‐fused rings in the oxygenate‐derived anions, which delivered promising and tunable CO2 uptake capacity surpassing the phenolate‐based SIL via a carbonate formation pathway (O−C bond formation), as illustrated by detailed spectroscopy studies. Further theoretical calculations and experimental comparisons demonstrated the more favorable reaction enthalpy and improved anti‐oxidation properties of the pyrazolonate‐derived SILs compared with phenolate anions. The achievements being made in this work provides a promising approach to achieve efficient carbon capture by combining the benefits of strong interaction strength of oxygenate species with CO2 and the stability improvement enabled by aza‐fused rings introduction.
Hybrid distributed online and alternating convex optimization‐based initial value accelerated hybrid precoding for millimeter wave multiple‐input‐multiple‐output
Authors: Kadiyala Ragodaya Deepthi , Kakarla Deepti , Chikyal Neetu 
Published: November 2023

SummaryThe hybrid precoding problem is considered a Frobenius norm reduction problem for the narrowband channel in a millimeter wave (mmWave) with multiple inputs and outputs (mmWave MIMO). This work proposes a hybrid distributed online and alternating convex optimization (HDO‐ACO) algorithm to improve hybrid precoding (HP), interpreted as a trace minimization problem. HDO‐ACO alternately determines the digital and analog precoders to reduce the trace by keeping the other constant. Initially, HDO‐ACO uses Lagrange's method to determine the digital precoding subproblem. Then, it uses the integrated distributed online convex optimization and alternating minimization algorithm in the analog precoder design. In the HP method, the digital and analog precoders are iteratively updated until the highest number of iterations or convergence is reached. But this hybrid precoding method requires an initial analog precoding matrix input to begin the iteration. The algorithms converge gradually and fall into a suboptimal solution when the initial analog precoding matrix is set randomly. Hence, an initial value acceleration‐based heuristic approach is used in the HDO‐ACO alternating minimization algorithm that calculates the initial feasible value of an alternating minimization method using channel conditions. The simulation results of the proposed HDO‐ACO algorithm are presented under bit error rate (BER), spectral efficiency (SE), and convergence behavior by comparing it with modified block coordinate descent–HP (MBCD‐HP), manifold optimization–alternating minimization (MO‐AltMin), and semi‐definite relaxation‐based alternating optimization (SDR‐AO). The proposed HDO‐ACO attains maximum SE and less BER than other hyper‐precoding designs.
Autonomous configuration establishment method of wireless network on condition monitoring for coupling and decoupling of railway vehicles
Authors: Iwasawa Nagateru , Hosokawa Yuta , Hada Akio , Mamada Shogo , Harashima Shuji , Fuwa Yasushi 
Published: November 2023

AbstractIn recent years, with the development of IoT, research and development of wireless sensor networks for monitoring has been advanced to monitor the condition of various devices in railway vehicles and notify train crews. In the operation of railway vehicles, the composition may be changed at stations by coupling and decoupling, and it is necessary to set up inter‐vehicle wireless network considering them. Therefore, to transmit sensor data in railway vehicles, we propose an autonomous configuration establishment method of wireless network for railway vehicles considering coupling and decoupling.
Enhancement of in vitro antibacterial activity and bioactivity of iodine‐loaded titanium by micro‐scale regulation using mixed‐acid treatment
Authors: Sawai Yasuhisa , Yamaguchi Seiji , Inoue Kazuya , Kato‐Kogoe Nahoko , Yamada Kazuto , Shimada Nanako , Ito Morihiro , Nakano Hiroyuki , Ueno Takaaki 
Published: November 2023

AbstractPostoperative infection and subsequent device loss are serious complications in the use of titanium dental implants and plates for jawbone reconstruction. We have previously reported that NaOH–CaCl2–thermal–ICl3–treated titanium (NaCaThIo) has a nano‐scale surface and exhibits antibacterial activity against Staphylococcus aureus. The present study examined the surface properties of mixed‐acid treated and then iodine‐treated titanium (MA–NaCaThIo), and evaluated oral antibacterial activity and cytotoxicity compared with the results obtained with NaCaThIo. MA‐NaCaThIo formed a surface layer with a nano‐scale network structure having microscale irregularities, and both the thickness of the surface layer (1.49 ± 0.16 μm) and the average surface roughness (0.35 ± 0.03 μm) were significantly higher than those of NaCaThIo. Furthermore, MA‐NaCaThIo maintained high hydrophilicity with a contact angle of 7.5 ± 1.7° even after 4 weeks, as well as improved apatite formation, iodine ion release, and antibacterial activity against Prevotella intermedia compared to NaCaThIo. Cell culture test revealed that MA‐NaCaThIo exhibited no cytotoxicity against MG‐63 and Vero cells, while increased cell proliferation, ALP activity and mineralization of MG‐63 compared to NaCaThIo. This treated titanium is expected to be useful for the development of next‐generation titanium devices having both bone‐bonding and antibacterial properties.
Utilization of excess microorganisms as carbon and electron sources in the sulfate reduction process
Authors: Yilmaz Tülay , Uçar Deniz 
Published: November 2023

AbstractBACKGROUNDThe cost of the substrate plays a crucial role in sulfate‐containing wastewater treatment. Utilizing a natural or low‐cost substrate is essential for effective sulfate reduction. This study investigates and compares the sulfate reduction performance of excess yeast and excess activated sludge as substrates to that of ethanol, one of the most commonly used substrates.RESULTSBoth waste sludge groups underwent initial anaerobic digestion and were subsequently fed into an anaerobic up‐flow bed reactor. The reactor operated through five periods using synthetic water containing 2000 mg SO42− L−1. To assess electron donor performance during transitions between carbon sources, famine periods (without substrate addition) were implemented. Maximum sulfate reduction efficiencies for ethanol, excess yeast and excess activated sludge, and yeast were 89%, 54% and 70%, respectively, with corresponding chemical oxygen demand oxidation rates of 86%, 81% and 92%. The ethanol‐fed period exhibited the highest sulfide (720 mg L−1 on day 116) and alkalinity (2035 mg CaCO3 L−1 on day 109) production. It is evident that waste activated sludge, primarily composed of prokaryotic bacteria, was more susceptible to biodegradation than eukaryotic waste yeast.CONCLUSIONSWhile ethanol is a favorable source of electrons, this study suggests that the waste products of biological processes can serve as an alternative to ethanol for sulfate reduction. This approach has the potential to reduce operating costs in treatment systems by using biological waste as a carbon source. © 2023 The Authors. Journal of Chemical Technology and Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry (SCI).
Syndiotactic Poly(Substituted Methylene)s with Alkyloxycarbonyl Side Chains: Effects of Side Chain Chirality on the Main Chain Helix and Crystallinity
Authors: Kiyoura Masamichi , Aizawa Yosuke , Nishimura Mihoko , Kurokawa Naruki , Tokita Masatoshi 
Published: November 2023

AbstractSyndiotactic poly(substituted methylene)s (st‐PMs) with alkyloxycarbonyl side chains form hexagonal columnar liquid crystals (Colh LCs), wherein the main chain adopting either right‐ or left‐handed helices is arranged in a 2D hexagonal lattice. This study investigates the main chain conformation for st‐PMs with chiral side chains, designated as st‐P8(3,7Me)‐fSS. st‐P8(3,7Me)‐fSS polymers possess 3,7‐dimethyloctyloxycarbonyl side chains at different S‐enantiomeric fractions, fS. In chiral st‐P8(3,7Me)‐fSS with an fS > 50%, the main chain adopts a one‐handed helical conformation along the longer contour with increasing fS. The fS influences the crystallinity of the polymers. Chiral P8(3,7Me)‐fSS polymers crystallize the Colh LCs upon cooling. The crystallite size, melting temperature, and fusion enthalpy increase with fS. Racemic st‐P8(3,7Me)‐50S does not crystallize.