bluuebunny/crossref_metadata_2025_split huggingface dataset:
Decorating Pd–Au Nanodots Around Porous In2O3 Nanocubes for Tolerant H2 Sensing Against Switching Response and H2S Poisoning
Authors: Zhao Xinhua , Du Lingling , Xing Xiaxia , Li Zhenxu , Tian Yingying , Chen Xiaoyu , Lang Xiaoyan , Liu Huigang , Yang Dachi 
Published: March 2024

AbstractWith the recently‐booming hydrogen (H2) economy by green H2 as the energy carriers and the newly‐emerged exhaled diagnosis by human organ‐metabolized H2 as a biomarker, H2 sensing is simultaneously required with fast response, low detection limit, and tolerant stability against humidity, switching, and poisoning. Here, reliable H2 sensing has been developed by utilizing indium oxide nanocubes decorated with palladium and gold nanodots (Pd–Au NDs/In2O3 NCBs), which have been synthesized by combined hydrothermal reaction, annealing, and chemical bath deposition. As‐prepared Pd–Au NDs/In2O3 NCBs are observed with surface‐enriched NDs and nanopores. Beneficially, Pd–Au NDs/In2O3 NCBs show 300 ppb‐low detection limit, 5 s‐fast response to 500 ppm H2, 75%RH‐high humidity tolerance, and 56 days‐long stability at 280 °C. Further, Pd–Au NDs/In2O3 NCBs show excellent stability against switching sensing response, and are tolerant to H2S poisoning even being exposed to 10 ppm H2S at 280 °C. Such excellent H2 sensing may be attributed to the synergistic effect of the boosted Pd–Au NDs’ spillover effect and interfacial electron transfer, increased adsorption sites over the porous NCBs’ surface, and utilized Pd NDs’ affinity with H2 and H2S. Practically, Pd–Au NDs/In2O3 NCBs are integrated into the H2 sensing device, which can reliably communicate with a smartphone.
Full‐mesh VPN performance evaluation for a secure edge‐cloud continuum
Authors: Kjorveziroski Vojdan , Bernad Cristina , Gilly Katja , Filiposka Sonja 
Published: March 2024

AbstractThe recent introduction of full‐mesh virtual private network (VPN) solutions which offer near native performance, coupled with modern encryption algorithms and easy scalability as a result of a central control plane have a strong potential to enable the implementation of a seamless edge‐cloud continuum. To test the performance of existing solutions in this domain, we present a framework consisted of both essential and optional features that full‐mesh VPN solutions need to support before they can be used for interconnecting geographically dispersed compute nodes. We then apply this framework on existing offerings and select three VPN solutions for further tests: Headscale, Netbird, and ZeroTier. We evaluate their features in the context of establishing an underlay network on top of which a Kubernetes overlay network can be created. We test pod‐to‐pod TCP and UDP throughput as well as Kubernetes application programming interface (API) response times, in multiple scenarios, accounting for adverse network conditions such as packet loss or packet delay. Based on the obtained measurement results and through analysis of the underlying strengths and weaknesses of the individual implementations, we draw conclusions on the preferred VPN solution depending on the use‐case at hand, striking a balance between usability and performance.
Effects of the Ethanolic Extract of Onion Peel on the Physicochemical Properties of Wheat Starch
Authors: Wang Cuntang , Wang Yuqing , Tian Shengxin , Du Guojun 
Published: March 2024

AbstractThe objective of this study is to examine the interactions between wheat starch (WS) and ethanol extract of onion peel (EEOP) at varying concentrations (1.0%, 2.5%, 5.0%, and 10.0%) during the process of gelatinization, and to assess the impact of these interactions on the physicochemical and retrogradation characteristics of wheat starch. In contrast to the control group, the incorporation of EEOP results in a reduction in retrogradation, an increase in solubility, and an increase in the swelling degree of wheat starch. Furthermore, the addition of the EEOP effectively hinders the retrogradation process of wheat starch. The incorporation of EEOP has the potential to decrease the enthalpy associated with starch retrogradation. Accordingly, the addition of 10% EEOP results in a decrease of 43.6% in the enthalpy of starch retrogradation in wheat starch after a storage period of 15 days, as compared to the control group. In addition, the incorporation of an enzyme known as EEOP has the potential to reduce the occurrence of crystallization in the process of starch retrogradation. Hence, the incorporation of EEOP may impede the regression of WS.
Mechanical performance of crumbed rubber concrete subjected to high temperature
Authors: Duan Daoming , Li Fumin , Guo Zhen , Ma Chuang 
Published: March 2024

AbstractTo address environmental pollution caused by waste tires, civil engineers have attempted to utilize waste tires in the construction of building structures and infrastructures, thereby conserving natural structural materials. Because of the pyrolysis of rubber at high temperature, crumbed rubber concrete (CRC) used in high‐temperature conditions or fire resistance engineering has several limitations. This study used crumbed rubber (CR) particles to replace fine aggregate in equal volume and fulfilled steady‐state tests at high temperatures to investigate the failure modes and mechanical behavior of CRC subjected to high temperatures. The effects of rubber content (0%, 10%, and 20%) and particle size (0.106, 0.425, and 2 mm) on the elastic models, ultimate compressive strengths, and peak strain of CRC mechanical properties were investigated using scanning electron microscopy analysis. The test results showed that at the same temperature, the mechanical properties reduced as the CR content increased. When suitable particle sizes of CR were employed, the reduction in the mechanical properties was slower compared to when CRC utilized smaller or larger particle sizes of CR. Because of the filling pores in CRC after CR decomposition at high temperatures, the compressive strength and elastic modulus of CRC fluctuated significantly.
Mission‐based design of UAVs
Authors: Chaudemar Jean‐Charles , Aïello Ombeline , de Saqui‐Sannes Pierre , Poitou Olivier 
Published: March 2024

AbstractOver the past decades, Unmanned Aerial Vehicles (UAVs) have increasingly been used in a wide variety of missions that range from surveillance to delivery. Unlike aircraft that always carry goods and passengers from an airport to another, UAVs do not systematically implement the same type of mission. UAVs are indeed multi‐mission during their time in operation, and the systems engineering approaches developed for one mission aircraft must be adapted to the multi‐mission context. Therefore, UAV design requires application of mission engineering upstream systems engineering, either to assess there is a UAV system that may accomplish a new mission, or to specify a new UAV system according to a given mission. To achieve that goal, the authors of the paper support the use of Model‐Based Mission Engineering. A three‐layer architecture ‐ purpose, operation, functions or capabilities ‐ is proposed as a design framework for missions. The Goal‐Oriented Requirements Language (GRL) serves as mission description language. The paper extends GRL to better address mission‐based design of UAVs. It is proposed to distinguish between internal and external resources. A goal detailing mechanism is introduced. A degraded mode evaluation becomes possible. GRL tools make it possible to evaluate how much a UAV system ‐ at least, an operator, a ground station, and a UAV ‐ may satisfy every stakeholder in both nominal and degraded modes. The proposed approach is applied to a high voltage surveillance UAV. The case study enables the introduction of four actors—Authority, Client, UAV and MissionSupervisor—that turn out to be generic and can be reused for other missions and UAV designs.
Soils information for urban customers: A perspective
Authors: Ohm Hannah M. , DeSutter Thomas M. , Hargiss Christina L. , Anderson Keith A. , Derby Nathan E. , Alvarez‐Torres Beverly 
Published: March 2024

AbstractDue to its benefits, including but not limited to increased access to affordable healthy food, bringing communities together for a common goal, and improving food security, urban agriculture is gaining popularity across the United States. Although soil‐based information is available at the national level, people in urban environments may have limited details about the soils in their communities. To bridge the gap between rural and urban agriculture, city, state, and federal agencies such as the Natural Resources Conservation Service could expand upon the soil survey programs that currently exist and are available within the WebSoilSurvey. Additionally, trace element testing and interpretation would allow for improved knowledge about the risks that urban soils may have on food quality for those interested in urban agriculture.Core Ideas
Detailed soil science information for urban agriculture may be lacking on a fine scale.
Opportunities exist to support the soil science needs of urban growers via local, state, and federal entities.
Information on urban soils can help provide healthy and sustainable foodstuffs.
Removal of reactive red dye by reusable chitosan‐polyaniline/Fe3O4 nanocomposite
Authors: An Tran Nguyen Minh , Phuc Tran Thanh , Nhi Dang Nguyen Thien , Van Cuong Nguyen 
Published: March 2024

AbstractWe report herein the synthesis of chitosan‐polyaniline/Fe3O4 (CS‐PANI/Fe3O4) nanocomposite for decoloring of Reactive Red 198 (RR 198) in aqueous solution. The prepared CS‐PANI/Fe3O4 was characterized by using Fourier transform infrared spectroscopy (FT‐IR), field‐emission scanning electron microscopy (FE‐SEM), and X‐ray diffraction (XRD). Various factors affected the removal of RR 198 such as removal time, dye concentration, pH, and adsorbent dose were also investigated. The maximum removal yield was found to be 96.16 % when adsorbed condition was 0.1 g of CS‐PANI/Fe3O4 in 50 mL of 50 ppm RR 198 dye solution, pH of 7 and adsorbed time of 120 min. The results indicated that the removal percentage of RR 198 dye was increased and up to 96.16 % when the adsorbed times increased.
Chemical constituents of the n‐hexane extract of Leonotis nepetifolia (L.) R. Br (Lamiaceae)
Authors: Tung Phan Thanh , Quyen Tran Hong Ngoc , Quang Ton That , Van Nguyen Thien Truong , Duong Ngo Thi Thuy , Ngan Vu Thi Tuyet , Nga Lai Thi , Phung Nguyen Kim Phi , Thu Nguyen Thi Hoai 
Published: March 2024

AbstractFriedelin (1), 5α‐stigmast‐22‐ene‐3‐one (2), chrysophanol (3), physcion (4), 4'‐O‐methylalpinumisoflavone (5), and tetracosanoic acid (6) were isolated from the n‐hexane extract of Leonotias nepetifolia (L.) R. Br collected at Ba Ria ‐ Vung Tau province, Vietnam. The chemical structures of these compounds were elucidated by MS and NMR spectroscopic analysis as well as compared with data in the literature. These compounds were known in Leonotis nepetifolia for the first time. Further studies on this plant are in progress.
Isoflavones from Placolobium vietnamense, an indigenous plant of Vietnam
Authors: Lien Do Thi My , Tuyet Huynh Thi Ngoc , Quyen Tran Hong Ngoc , Truong Tuong Lam , Hang Nguyen Thi Thu , Thao Nguyen Thi Ngoc , Dung Nguyen Thi My 
Published: March 2024

AbstractPlacolobium vietnamense N.D.Khoi & Yakovlev (Fabaceae) is an indigenous plant of Vietnam. Up to now, this plant has not yet been chemically and biologically studied. In this paper, six isoflavones including afrormosin (1), cladrastin (2), 8‐O‐methylretusin (3), millesianin C (4), barbigerone (5), and durallone (6) were isolated from the ethyl acetate extract of the stem bark of Placolobium vietnamense. Their structures were established by means of physical data (ESI MS, 1D and 2D NMR) and evaluated for the cytotoxic activities against liver hepatocellular carcinoma (HepG2), human lung cancer (NCI‐H460), human epithelial carcinoma (HeLa) and human breast cancer (MCF‐7) cell lines. This is the first report on phytochemical studies of this plant.
Study of ozone disinfection in the hospital environment
Authors: Tu Le Hoang , Oanh Le Hoang , Trung Nguyen Vu , Cuong Le Cao , Oanh Doan Thi Yen , Dieu Tran Vinh , Nghi Nguyen Hoang 
Published: March 2024

AbstractHundreds of millions of patients are affected by health care‐associated infections worldwide each year. In the hospitals, contaminated surfaces and air may play an important role in the transmission of respiratory pathogens. Recently, ozone disinfection is employed and shows the effectiveness as an alternative sanitizing technology to conventional disinfectants in reducing the microbial contamination in air as well as in the surfaces of the functional rooms of the hospitals. In this paper, the disinfection capacity of ozone gas is investigated by means of analysing the CFU reduction during ozonation of an operative theatre in Ha Dong polyclinic hospital (Hanoi, Vietnam). The full removal of the microorganisms and fungi in the operative theatre during ozonation was achieved by using ozone of 5 ppm concentration and exposure time of 40‐60 min.
New iridoid from Valeriana hardwickii Wall.
Authors: Hong Le Thi Thu , Huyen Tran Thi , Tri Le Minh , Hien Tran Duy , Loi Huynh 
Published: March 2024

AbstractA new iridoid, (4S,5R,6S,7S,9S)‐7,10,11‐trihydroxy dihydronepetalactone (1) together with four known flavonoids including linarin, neodiosmin, neobudofficide and rhoifolin were isolated from aerial parts of Valeriana hardwickii Wall.. Chemical structures were elucidated by extensive spectroscopic analyses including ESI‐HRMS and 1D, 2D‐NMR spectral data as well as by comparison with those reported in the literatures. Compound 1 showed no cytotoxic activity toward three human cancer cell lines (CCRF‐CEM, MDA‐MB‐231 and HCT‐116).
Safe sodium‐ion battery using hybrid electrolytes of organic solvent/pyrrolidinium ionic liquid
Authors: Quan Phung , Linh Le Thi My , Tuyen Huynh Thi Kim , Van Hoang Nguyen , Thanh Vo Duy , Van Man Tran , Phung Le My Loan 
Published: March 2024

AbstractIonic liquids (ILs) have been considered as an alternative class of electrolytes compared to conventional carbonate solvents in rechargeable lithium/sodium batteries. However, the drawbacks of ILs are their reducing ionic conductivity and their large viscosity. Therefore, mixtures of alkyl carbonate solvents with an IL and a sodium bis(trifluoromethane sulfonyl)imide (NaTFSI) have been investigated to develop new electrolytes for sodium‐ion batteries. In this work, N‐Butyl‐N‐methylpyrrolidinium bis(trifluoro‐methanesulfonyl) imide (Py14TFSI) was used as co‐solvent mixing with commercial electrolytes based on the carbonate, i.e. EC‐PC (1:1), EC‐DMC (1:1), and EC‐PC‐DMC (3:1:1). The addition of ionic liquid in the carbonate‐based electrolyte solution results in (i) enhancing ionic conductivity to be comparable with a solvent‐free IL‐based electrolyte, (ii) maintaining the electrochemical stability window, and (iii) IL acted as a retardant rather than a flame‐inhibitor based on the self‐extinguish time (SET) of the mixed electrolyte mixture when exposed to a free flame. All mixed electrolyte systems have been tested in sodium‐coin cells versus Na0.44MnO2 (NMO) and hard carbon (HC) electrodes. The cells show good performances in charge/discharge cycling with a retention > 96 % after 30 cycles (∼90 mAh.g‐1 for NMO and 180 mAh.g‐1 for HC, respectively) demonstrating good interfacial stability and highly stable discharge capacities.
Synthesis of graphene oxide ‐ based silver cotton fabric application for antibacterial activity
Authors: Diep Tran Chau , Dat Nguyen Minh , Tai Le Tan , Phuc Nguyen Ha Thien , An Nguyen Thi Thuy , Huong Le Tran Thien , Hung Nguyen Gia , Hy Lac Dan , Oanh Doan Thi Yen , Nam Hoang Minh , Phong Mai Thanh , Hieu Nguyen Huu 
Published: March 2024

AbstractIn this study, silver/graphene oxide nanocomposites (Ag/GO) was synthesized via in situ method for antibacterial application. Silver/graphene oxide cotton fabric(Ag/GO/cotton fabric) was then synthesized via the dip ‐ coating method. The characteristics of GO, Ag/GO, and Ag/GO/cotton fabric were investigated with Fourier transform infrared spectroscopy, X‐ray diffraction, transmission electron microscopy, Raman spectroscopy, and energy ‐ dispersive X‐ray spectroscopy. The results showed that the distribution of silver particles with an average size of 17.41±4.55 nm was uniformed on the GO sheets. The Ag/GO mounted on the fabric surface after coated. Pseudomonas aeruginosa ATCC 27853 (P. aeruginosa) and Staphylococcus aureus ATCC 25923 (S. aureus) were used to test the antibacterial activity of Ag/GO and Ag/GO/cotton fabric by disk diffusion method. The results demonstrated that Ag/GO displayed high antibacterial activity with minimum inhibitor concentration (MIC) value was 2.0 and 50.0 μg/mL with P. aeruginosa and S. aureus, respectively. The Ag/GO/cotton fabric was able to against two types of bacteria P. aeruginosa and S. aureus with diameter of inhibition zone was 5.00 and 2.50 mm, respectively. The results had prospective applications in a lot of fields like clothing, mask, and protective gear.
Flavonoids and phenolics from the wholeplant of Macrosolen bidoupensis Tangane & V.S. Dang
Authors: Hung Le Kieu , Thanh Phan Duy , Minh Phan Nhat , Dat Bui Trong , Tuyen Pham Nguyen Kim , Chi Huynh Bui Linh , Dan Nguyen Thi Ngoc , Van Son Dang , Tri Mai Dinh , Phat Nguyen Tan 
Published: March 2024

AbstractFive flavonoids, including quercetin (1) and four its derivatives, quercitrin (2), isoquercitrin (3), astibin (4), and rutin (5), together with two phenolic glycosides, 3,3′‐di‐O‐methylellagic acid 4‐O‐β‐D‐xylopyranoside (6), and aesculin (7) were isolated from the whole plants of Macrosolen bidoupensis Tangane & V.S. Dang. Their chemical structures were characterized using HR‐ESI‐MS, NMR data and comparison with published data. Compounds (3, 4 & 7) were notified from the Macrosolen genus for the first time, whereas, all isolated compounds were informed for the first time from this species.
In silico studies of natural products from medicinal plants to identify potential inhibitors for SARS‐CoV‐2 3C‐like protease
Authors: Khanh Nguyen Tan , Hoa Tran Thanh 
Published: March 2024

AbstractThe coronavirus outbreak of 2019 (COVID‐19) has been seen as a global health concern. The 3‐chymotrpsin‐like protease or SARS‐CoV‐2 main protease, whose ability to control the coronavirus replication, has been a promising target for developing drugs against coronavirus infection. In this study, we used the molecular docking approach to screen natural compounds from traditional medicinal plants in Vietnam to find the possible inhibitors of SARS‐CoV‐2 main protease. The docking results revealed that among 170 compounds, the top 15 compounds with the high binding affinity to 3CL protease (PDB ID: 6WNP) might act as promising anti‐SARS‐CoV‐2 molecules. Among these compounds, Gracillin and Proanthocyanidins showed the highest binding affinity with a docking score of ‐9.2 Kcal/mol. However, further experiments are required for developing possible natural therapeutic medications for combating this coronavirus.
Ultrahigh sun‐light‐responsive/not responsive integrated catalyst for C‐S arylation/humidity sensing
Authors: Chaubey Surabhi , Yadav Rajesh K. , Kim Tae Wu , Singh Atul P. , Kumar Kuldeep , Yadav B. C. 
Published: March 2024

AbstractCovalent organic frameworks (COFs) exhibit excellent characteristics in the optoelectronic and photocatalytic areas. The broad demand for highly efficient flexible clothes enhances the investigation of multifarious COFs materials. Currently, COFs have materialized as future generation flexible clothes layered materials with previously designed π‐π stacking skeletons and extremely efficient ordered structures, which are more fascinated for countering their photocatalytic characteristics. Still, COFs are generally formed as solid materials because of direction‐dependent growth which make them unpredictable to integrate into flexible clothes. Here, by choosing tetraamino‐benzoquinone (T) and N,N'‐di‐(4‐benzoic acid)‐perylene‐3,4,9,10‐tetracarboxylic acid diimide (BP) monomers with photocatalytic activity, ornately designed sun‐light‐responsive COFs with well‐ordered donor and acceptor moieties are in situ synthesized on flexible activated carbon cloth (fACC), eventually forming TBPCOF‐fACC structures. Ultra‐responsive photocatalyst is fruitfully fabricated with the TBPCOF‐fACC structure and showed an excellent selective C‐S arylation performance with high yields (99 %) at ambient temperature. The research presents new plans for constructions of advanced light harvesting functional flexible clothes with programmable COFs material, covering the technique for a creation of highly improved applications in photocatalytic and various areas. The TBPCOF‐fACC based humidity sensor shows the average sensitivity as 1.58 MΩ/%RH along with calculated response and recovery time as 15 s and 55 s respectively. The sensor has 96.20 % repeatability and shows long term stability.
Binary TiO2/reduced graphene oxide nanocomposite for improving methylene blue photodegradation
Authors: Trinh Dinh Ngoc , Viet Thieu Quang Quoc , Nhu Tran Huynh , Dat Nguyen Minh , Thinh Doan Ba , Hai Nguyen Duy , Tai Le Tan , Oanh Doan Thi Yen , Khoi Vu Hoang , Nam Hoang Minh , Phong Mai Thanh , Hieu Nguyen Huu 
Published: March 2024

AbstractHerein, TiO2/reduced graphene oxide (TiO2/rGO) nanocomposites were fabricated using the hydrothermal method and investigated with the amount of titanium precursors. The binary nanocomposites were characterized by modern analysis method. The adsorption capacity and photocatalyst degradation were performed based on methylene blue. The appropriate as‐prepared material with 1.5 mL TIP contained a large specific surface area (110.549 m2/g) with TiO2 ranging 4‐25 nm homogenously grafting on the rGO surface. The adsorption results were shown in good accordance with the pseudo‐second‐order while the photoreaction kinetics pursued the pseudo‐first‐order with a high‐rate constant. After the adsorption state, the yield reaches 62.1 % and under UV light for 90 min, 96.8 % of MB was efficiently degraded from water media, which showed a more impressive effect as compared with P25 and rGO. Therefore, the use of TiO2/rGO could be applied in the mass‐scale treatment of organic pollutants in wastewater.
Evaluation of SARS‐CoV‐2 inhibition of some compounds inCYMBOPOGON CITRATUS oil combining docking and molecular dynamics simulations
Authors: Thuy Bui Thi Phuong , Nhan Vo Duy , Quang Nguyen Minh , Duoc Nguyen Thanh , Van Tat Pham 
Published: March 2024

AbstractThe visual screening and simulation methods were used to evaluate the inhibitory ability of 34 compounds in Cymbopogon citratus oil against SARS‐CoV‐2. We chose the best compound, SC22, with a DS of ‐12.80 Kcal. mol‐1 with a distance RMSD of 0.23. This was the most effective compound at inhibiting the viral protein 6LU7. For the protein ACE2 or an endemic host receptor, the docking ability of SC22 showed DS = ‐13.13 Kcal.mol‐1 and RMSD = 1.32 Å; SC10 docked in DS = ‐12.79 Kcal.mol‐1 and RMSD = 0.91 Å; SC11 gave the docking values DS = ‐12.77 Kcal.mol‐1 and RMSD = 1.15 Å. SC26 showed DS = ‐12.76 Kcal.mol‐1 and RMSD = 1.44 Å; SC20 showed DS = ‐12.68 Kcal.mol‐1 and RMSD = 1.22 Å; the Cymbopogon citratus oil involved the potential compounds for contributing to drug development. The compounds SC10, SC11, SC20, SC22 also tested and refined the druglikeness properties. The compound SC22 gives many druglikeness properties and is easy to carry out drug synthesis.