bluuebunny/crossref_metadata_2025_split huggingface dataset:
(Diacetoxyiodo)benzene Mediated Oxidative Conversion of Erlenmeyer Azlactones to 2‐Substituted Oxazolines Under Basic Conditions: Synthesis of 4‐Methoxy‐2‐phenyl‐5‐aryl‐4,5‐dihydrooxazole‐4‐carboxylate
Authors: Shinde Rameshwar S. , Narnawre Aditya R. , Walke Prashik M. , Karade Nandkishor N. 
Published: January 2023

AbstractOne‐pot two stage oxidative transformation of Erlenmeyer azlactones to diversely substituted oxazoline derivatives have been accomplished using treatment with sodium methoxide followed by the reaction with trivalent iodine reagent such as (diacetoxyiodo)benzene as oxidant. The mild reaction conditions, metal‐free oxidative conversion, readily accessible starting materials and operational convenience are the important features of the methodology.
Synthesis, Optical and Electrochemical Properties of Novel Formazan Analogs Incorporated Fluorene Moiety
Authors: El Guesmi Nizar 
Published: January 2023

AbstractA series of novel formazan analogs4 a–e, having MeO, Me, Cl, NO2atpara/meta‐position in 1‐phenyl ring was synthesized by treatment of 9‐fluorenone hydrazone2with a series of the hydrazonoyl chlorides3 a–e. The molecular structure elucidation of all newly synthesized formazans was achieved by using elemental analyses as well as spectroscopic tools. The substituent and solvatochromic effects of formazan derivatives in seventeen solvents with different chemical and physical properties were investigated by absorption spectroscopy. A small band shift is obtained in the absorption maxima as a function of solvent, displaying a less sensitivity of compounds4 a–eto solvent polarity. A noticeable variation in the absorption maxima (λmax) values was observed by modifying the electronic characteristic and positions of the substituents. Furthermore, the electrochemical properties were adressed by cyclic voltammetry measurements, and the influence of electron‐donating and withdrawing nature of the substituents on electrochemical properties of formazan derivatives has been studied. In addition, computational studies on the formazan structures were performed using B3LYP functional in DFT method at the 6‐31G(d,p) basis set, and the energy values related to their frontier orbitals (HOMO,LUMO) were estimated. A variety of reactivity descriptors, namely, ionization potential (IP), electron affinity (EA), hardness (η), softness (S), chemical potential (μ), electronegativity (χ) and electrophilicity index (ω) have been determinedviaenergies values of HOMO and LUMO. The experimental data and theoretical results showed a good correlation.
Phosphine‐Catalyzed α‐ and Vicinal Bis‐Addition of P(O)H Compounds to Alkynoates
Authors: Il'in Anton V. , Khayarov Khasan R. , Anisimova Kristina S. , Islamov Daut R. , Kuchaev Evgenii S. 
Published: January 2023

AbstractThe efficient route to phosphine‐catalyzed preparation of α‐phosphoryl acrylates and vicinal bis‐phosphoryl propanoates was developed. The products of diarylphosphine oxide monoaddition and dibenzyl‐H‐phosphonate vicinal bis‐addition to ethylphenylpropiolate were obtained by using previously data on the reactivity and prototropic tautomerism of various classes of P(O)H compounds. In previous works devoted to the phosphine‐catalyzed addition of P(O)H compounds to this activated alkyne, the use of secondary phosphine oxides gave only vicinal bisphosphine oxides, while the addition of H‐phosphonates led only to α‐products. On the basis of this work and our previous studies, a series of the reactivity increase of P(O)H compounds in the phosphine‐catalyzed β‐addition reaction can be assumed: (AlkO)2P(O)H≤Ph(EtO)P(O)H<(BnO)2P(O)H<(m‐(CH3)2C6H3)2P(O)H<p‐Tol2P(O)H<Ph2P(O)H. The α‐umpolung addition is less dependent on nature of P(O)H compounds. The increased reactivity of Ph2P(O)H can be used for the introduction of several groups at once: phosphonate and phosphine oxide at the multiple bond of alkyne with or without the isolation of the α‐addition intermediate.
Synthesis of Amide Derivatives as Tubulin Polymerization Inhibiting Antiproliferative Agents
Authors: Kannekanti Praveen kumar , Nukala Satheesh Kumar , Bangaru Mallikarjuna , Sirassu Narsimha , Manchal Ravinder , Thirukovela Narasimha Swamy 
Published: January 2023

AbstractHerein, we synthesized some new imidazole‐tetrazole‐amide hybrids (7 a–o) and investigated their antiproliferative activity on three human cancer cell lines like HEPG2, A549 and MCF‐7. Generally, most of them displayed more activity on A549 than other two cell lines. Specifically, compounds N‐(3,5‐dimethoxyphenyl)‐2‐(5‐(1‐methyl‐1H‐imidazol‐2‐yl)‐2H‐tetrazol‐2‐yl)acetamide (7 b) and N‐(4‐chloro‐3,5‐dimethoxyphenyl)‐2‐(5‐(1‐methyl‐1H‐imidazol‐2‐yl)‐2H‐tetrazol‐2‐yl)acetamide (7 m) had almost similar potency on A549, while, they had significant activity on MCF‐7 in comparison to the standard drug Combretastatin A‐4 (CA‐4). Besides, compounds 4‐(2‐(5‐(1‐methyl‐1H‐imidazol‐2‐yl)‐2H‐tetrazol‐2‐yl)acetyl)benzonitrile (7 j) and N‐(3,5‐dichlorophenyl)‐2‐(5‐(1‐methyl‐1H‐imidazol‐2‐yl)‐2H‐tetrazol‐2‐yl)acetamide (7 k) showed most promising activity against A549 as compared to the CA‐4. The uppermost activity against A549 found for the compounds 7 j and 7 m have IC50 values 1.09 and 1.26 μM respectively. The ability of potent compounds 7 b, 7 j, 7 k and 7 m to inhibit the tubulin polymerization was then studied and found that compounds 7 b and 7 m exhibited promising potency in comparison to the CA‐4. Further, molecular docking studies of compounds 7 b, 7 j, 7 k and 7 m into the tubulin's colchicine‐binding site revealed the possible interactions with tubulin. Finally, in silico ADMET studies revealed that compounds 7 b, 7 j, 7 k and 7 m showed high GI absorption and followed rules of Lipinski, Ghose, Veber, Egan and Muegge without any deviation. Further anticancer mechanism studies are under progress.
Comparative Photocatalytic Activity and Total Organic Carbon Removal Efficiency of TiO2 And ZnO for Reactive Black 5 Photodegradation
Authors: Çiçek Özkan Betül , Selen Veyis , Gülyüz Feyza , Dursun Gülbeyi 
Published: January 2023

AbstractThe photocatalytic performance of TiO2 and ZnO was comparatively studied for photocatalytic degradation of reactive black 5 (RB5) under artificial UVC irradiation. The effect of initial solution pH, catalyst concentration, initial RB5 concentration, purging oxygen rate, stirring rate, and process temperature on the degradation process by TiO2 and ZnO was investigated. In addition, total organic carbon (TOC) analysis has been employed for each parameter to detect the presence of organic intermediates and the photodegradation performance of catalysts simultaneously with the photocatalytic degradation process. The RB5 photodegradation was more rapid in the aqueous medium by TiO2 under UVC irradiation compared to the catalysis by ZnO. On the other hand, the slower photocatalysis by ZnO resulted in generating more organic intermediates. The structural and morphological analyses of photocatalysts TiO2 and ZnO were performed using XRD and FE‐SEM techniques. The UV‐vis spectroscopy measurements supported that the TiO2 demonstrated evidently better photocatalytic activity than ZnO for RB5 degradation.
Synthesis of a Coal Fly Ash‐Based NaP Zeolite Using the Microwave‐Ultrasonic Assisted Method: Preparation, Growth Mechanism, and Kinetics
Authors: Liu Yixuan , Zhou Tengteng , Chen Xingxing , Li Hua , Xu Xiuli , Dou Jinxiao , Yu Jianglong 
Published: January 2023

AbstractFly ash was used as the raw material to prepare coal fly ash‐based NaP zeolite using the microwave‐ultrasonic‐hydrothermal method. The obtained NaP zeolite has a completed crystal structure, regular surface morphology, uniform particle size (about 1.6 um), large specific surface area (48.85 m2/g) and good thermal stability. Under microwave and ultrasonic external fields, the coal fly ash‐based NaP zeolite crystals grow in an S‐shape, achieving single crystal growth and uniform crystal growth size. The activation energy of NaP zeolite crystal growth Ea is 2.08 kJ/mol, the pre‐exponential factor A is 85.63.
Carrier‐Free ATP‐Activated Nanoparticles for Combined Photodynamic Therapy and Chemotherapy under Near‐Infrared Light
Authors: Su Zehou , Xi Dongmei , Chen Yingchao , Wang Ran , Zeng Xiaolong , Xiong Tao , Xia Xiang , Rong Xiang , Liu Ting , Liu Wenkai , Du Jianjun , Fan Jiangli , Peng Xiaojun , Sun Wen 
Published: January 2023

AbstractThe combination of photodynamic therapy (PDT) and chemotherapy (chemo‐photodynamic therapy) for enhancing cancer therapeutic efficiency has attracted tremendous attention in the recent years. However, limitations, such as low local concentration, non‐suitable treatment light source, and uncontrollable release of therapeutic agents, result in reduced combined treatment efficacy. This study considered adenosine triphosphate (ATP), which is highly upregulated in tumor cells, as a biomarker and developed ingenious ATP‐activated nanoparticles (CDNPs) that are directly self‐assembled from near‐infrared photosensitizer (Cy‐I) and amphiphilic Cd(II) complex (DPA‐Cd). After selective entry into tumor cells, the positively charged CDNPs would escape from lysosomes and be disintegrated by the high ATP concentration in the cytoplasm. The released Cy‐I is capable of producing single oxygen (1O2) for PDT with 808 nm irradiation and DPA‐Cd can concurrently function for chemotherapy. Irradiation with 808 nm light can lead to tumor ablation in tumor‐bearing mice after intravenous injection of CDNPs. This carrier‐free nanoparticle offers a new platform for chemo‐photodynamic therapy.
Revealing the Enhanced Thermoelectric Properties of Controllably Doped Donor‐Acceptor Copolymer: The Impact of Regioregularity
Authors: Zhang Yingyao , Deng Longhui , Cho Yongjoon , Lee Jungho , Shibayama Naoyuki , Zhang Zilong , Wang Can , Hu Zhenyu , Wang Jing , Wu Feiyan , Chen Lie , Du Yitian , Ren Fangbin , Yang Changduk , Gao Peng 
Published: January 2023

AbstractAlbeit considerable attention to the fast‐developing organic thermoelectric (OTE) materials due to their flexibility and non‐toxic features, it is still challenging to design an OTE polymer with superior thermoelectric properties. In this work, two “isomorphic” donor–acceptor (D–A) conjugated polymers are studied as the semiconductor in OTE devices, revealing for the first time the internal mechanism of regioregularity on thermoelectric performances in D–A type polymers. A higher molecular structure regularity can lead to higher crystalline order and mobility, higher doping efficiency, order of energy state, and thermoelectric (TE) performance. As a result, the regioregular P2F exhibits a maximum power factor (PF) of up to 113.27 µW m−1 K−2, more than three times that of the regiorandom PRF (35.35 µW m−1 K−2). However, the regular backbone also implies lower miscibility with a dopant, negatively affecting TE performance. Therefore, the trade‐off between doping efficiency and miscibility plays a vital role in OTE materials, and this work sheds light on the molecular design strategy of OTE polymers with state‐of‐the‐art performances.
Supramolecular Photonic Hydrogel for High‐Sensitivity Alkaline Phosphatase Detection via Synergistic Driving Force
Authors: Lu Dengfeng , Qin Meng , Zhao Yonghang , Li Hongxiang , Luo Longbo , Ding Chunmei , Cheng Pei , Su Meng , Li Huiying , Song Yanlin , Li Jianshu 
Published: January 2023

AbstractStructurally‐colored photonic hydrogels which are fabricated by introducing hydrogels into thin films or photonic crystal structures are promising candidates for biosensing. Generally, the design of photonic hydrogel biosensors is based on the sensor‐analyte interactions induced charge variation within the hydrogel matrix, or chemically grafting binding sites onto the polymer chains, to achieve significant volume change and color variation of the photonic hydrogel. However, relatively low anti‐interference capability or complicated synthesis hinder the facile and low‐cost fabrication of high‐performance photonic hydrogel biosensors. Here, a facilely prepared supramolecular photonic hydrogel biosensor is developed for high‐sensitivity detection of alkaline phosphatase (ALP), which is an extensively considered clinical biomarker for a variety of diseases. Responding to ALP results in the broken supramolecular crosslinking and thus increased lattice distancing of the photonic hydrogel driven by synergistic repulsive force between nanoparticles embedded in photonic crystal structure and osmotic swelling pressure. The biosensor shows sensitivity of 7.3 nm spectral shift per mU mL−1 ALP, with detection limit of 0.52 mU mL−1. High‐accuracy colorimetric detection can be realized via a smartphone, promoting point‐of‐care sensing and timely diagnosis of related pathological conditions.
Controllable Preparation of 2D V2O5 Peroxidase‐Mimetic Nanozyme to Develop Portable Paper‐Based Analytical Device for Intelligent Pesticide Assay
Authors: Li Haiyin , Zhao Suixin , Wang Zhixin , Li Feng 
Published: January 2023

AbstractGiven severe harmfulness of pesticides, unique characteristics of peroxidase‐mimetic nanozymes, and favorable prospects of paper‐based analytical devices (PADs), it is highly desirable to construct a nanozyme‐based PAD for intelligent analysis of pesticide without enzyme/aptamer/antibody and interference of O2. Herein, 2D nanosheet‐like V2O5 (2D‐VONz) with exclusive peroxidase‐mimetic activity is controllably prepared under the optimal reactants concentration and reaction temperature. Experimental characterizations demonstrate that 2D‐VONz exhibits high affinity and catalytic rate, and catalytic oxidation is dependent on •OH yielded from the decomposition of H2O2 catalyzed by 2D‐VONz, and the catalytic performance is relevant to π–π stacking force‐controlled surface zeta potential of 2D‐VONz changed by substrates, giving a comprehensive understand of the inherent mechanism. Interestingly, 2D‐VONz activity is inhibited by pesticide glyphosate (Gly), and then is exploited to develop a PAD, on which, Gly declines 2D‐VONz activity to prevent it from catalyzing the oxidation of 3,3′,5,5′‐tetramethylbenzidine, contributing to rapid, naked‐eye, and portable analysis of pesticide using a smartphone. The current strategy on preparing exclusive peroxidase‐mimetic 2D nanozyme, investigating catalytic mechanism, developing nanozyme‐based PAD, and achieving direct pesticide sensing will set up new avenues to improve the analytical performance, strengthen the practicability, and broaden the application scope of nanozymes.
Biomimetic Nanobomb for Synergistic Therapy with Inhibition of Cancer Stem Cells
Authors: Liu Shuang , Zhang Tianshu , Li Shanshan , Wu Qingyuan , Wang Kexin , Xu Xican , Lu MingZhu , Shao Rongguang , Zhao Wuli , Liu Huiyu 
Published: January 2023

AbstractCancer stem cells (CSCs), a type of cell with self‐renewal, unlimited proliferation, and insensitivity to common physical and chemical factors, are the key to cancer metastasis, recurrence, and chemo‐resistance. Available CSCs inhibition strategies are mainly based on small molecule drugs, yet are limited by their off‐target toxicity. The link between CSCs and non‐CSCs interconversion is difficult to sever. In this work, a nanotherapeutic strategy based on MnOx‐loaded polydopamine (MnOx/PDA) nanobombs with chemodynamic, photodynamic, photothermal and biodegradation properties to inhibit CSCs and non‐CSCs concurrently is reported. The MnOx/PDA nanobombs can directly disrupt the microenvironment and tumorigenic capacity of CSCs by generating hyperthermia, oxidative stress and alleviating hypoxia. The markers of CSCs are subsequently downregulated, leading to the clearance of CSCs. Meanwhile, the synergistic therapy mediated by MnOx/PDA nanobombs can directly ablate the bulk tumor cells, thus cutting off the supply of CSCs transformation. For tumor targeting, MnOx/PDA is coated with macrophage membrane. The final tumor inhibition rate of the synergistic therapy is 70.8% in colorectal cancer (CRC) model. Taken together, the present work may open up the exploration of nanomaterial‐based synergistic therapy for the simultaneous elimination of therapeutically resistant CSCs and non‐CSCs.
Quasi‐Homogeneous and Hierarchical Electronic Textiles with Porosity‐Hydrophilicity Dual‐Gradient for Unidirectional Sweat Transport, Electrophysiological Monitoring, and Body‐Temperature Visualization
Authors: Dong Jiancheng , Peng Yidong , Wang Dan , Li Le , Zhang Chao , Lai Feili , He Guanjie , Zhao Xu , Yan Xiu‐Ping , Ma Piming , Hofkens Johan , Huang Yunpeng , Liu Tianxi 
Published: January 2023

AbstractOn‐skin electronics based on impermeable elastomers and stacking structures often suffer from inferior sweat‐repelling capabilities and severe mechanical mismatch between sub‐layers employed, which significantly impedes their lengthy wearing comfort and functionality. Herein, inspired by the transpiration system of vascular plants and the water diode phenomenon, a hierarchical nonwoven electronic textile (E‐textile) with multi‐branching microfibers and robust interlayer adhesion is rationally developed. The layer‐by‐layer electro‐airflow spinning method and selective oxygen plasma treatment are utilized to yield a porosity‐hydrophilicity dual‐gradient. The resulting E‐textile shows unidirectional, nonreversible, and anti‐gravity water transporting performance even upon large‐scale stretching (250%), excellent mechanical matching between sub‐layers, as well as a reversible color‐switching ability to visualize body temperature. More importantly, the conducting and skin‐conformal E‐textile demonstrates accurate and stable detecting capability for biomechanical and bioelectrical signals when applied as an on‐skin bioelectrode, including different human activities, electrocardiography, electromyogram, and electrodermal activity signals. Further, the E‐textile can be efficiently implemented in human‐machine interfaces to build a gesture‐controlled dustbin and a smart acousto‐optic alarm. Hence, this hierarchically‐designed E‐textile with integrated functionalities offers a practical and innovative method for designing comfortable and daily applicable on‐skin electronics.
NiO/Ni Heterojunction on N‐Doped Hollow Carbon Sphere with Balanced Dielectric Loss for Efficient Microwave Absorption
Authors: Li Bei , Ma Ziqian , Zhang Xiao , Xu Jia , Chen Yujin , Zhang Xitian , Zhu Chunling 
Published: January 2023

AbstractHollow carbon spheres are potential candidates for lightweight microwave absorbers. However, the skin effect of pure carbon‐based materials frequently induces a terrible impedance mismatching issue. Herein, small‐sized NiO/Ni particles with heterojunctions on the N‐doped hollow carbon spheres (NHCS@NiO/Ni) are constructed using SiO2 as a sacrificing template. The fabricated NHCS@NiO/Ni displayed excellent microwave absorbability with a minimum reflection loss of −44.04 dB with the matching thickness of 2 mm and a wider efficient absorption bandwidth of 4.38 GHz with the thickness of 1.7 mm, superior to most previously reported hollow absorbers. Experimental results demonstrated that the excellent microwave absorption property of the NHCS@NiO/Ni are attributed to balanced dielectric loss and optimized impedance matching characteristic due to the presence of NiO/Ni heterojunctions. Theoretical calculations suggested that the redistribution of charge at the interfaces and formation of dipoles induced by N dopants and defects are responsible for the enhanced conduction and polarization losses of NHCS@NiO/Ni. The simulations for the surface current and power loss densities reveal that the NHCS@NiO/Ni has‑ applicable attenuation ability toward microwave under the practical application scenario. This work paves an efficient way for the reasonable design of small‐sized particles with well‐defined heterojunctions on hollow nanostructures for high‐efficiency microwave absorption.
Pull‐out capacity prediction of sustainable cementitious composites with artificial intelligence and statistical methods
Authors: Unsalan Kevser , Balcikanli Bankir Muzeyyen , Cansiz Omer Faruk 
Published: January 2023

AbstractConcrete is used with reinforcement in structures so adherence gains importance especially in fire scenarios. To contribute production of sustainable concrete, by‐products like granulated blast furnace slag, fly ash, and silica fume were used, generally. In this study, to determine the elevated temperature resistance of by‐product‐added composites, samples were exposed to 250, 500, and 750°C and bonding behavior of composites was determined with pull‐out test. Moreover, prediction models were developed to estimate concrete‐reinforcement adherence values without experimentation and importantly before a fire. For the prediction models, considering the cross correlation, the mixture type, temperature, compressive strength, and flexural strength of concretes were selected as independent variables different from literature and pull‐out capacity (POC) as dependent variable. Artificial neural network (ANN) and adaptive neuro‐fuzzy inference system (ANFIS) were used for prediction models. As a statistical method, multiple linear regression was used. The performances of pull out prediction models were compared according to coefficient of correlation (R), mean square error (MSE), and mean percentage error (MPE). Among the statistical models, Quadratic and pure quadratic performance surpassed the ANFIS model, which is a combination of ANN and fuzzy techniques. The best performance was obtained in ANN model with 99.85%, 3.65 kg, 3.1% for R, MSE and MPE, respectively. Therefore, ANN can provide a new applicable model to effectively predict POC of by‐product‐added cementituous composites under fire effect.
Carbon reinforced concrete exposed to high temperatures
Authors: Holz Karoline , Curbach Manfred 
Published: January 2023

AbstractThe material behavior of carbon reinforced concrete exposed to high temperatures was examined in 118 tensile and 81 bond tests using two material combinations. This analysis served to determine resilient material values under temperature influence for current carbon reinforcements and to show starting points for further test series. In this article, the test specimens for the tensile and bond tests are described in detail as well as the used test setup. Special attention is given to the physical–chemical behavior of the impregnated material, which were analyzed namely with dynamic mechanical thermal analysis (DMTA) and thermal gravimetric analysis (TGA). Finally, the results of the tensile and bond tests under different temperature exposures are presented and classified.
Canguilhem and the Logic of Life
Authors: Etxeberria Arantza , Wolfe Charles T. 
Published: January 2023

AbstractWe examine aspects of Canguilhem’s philosophy of biology, concerning the knowledge of life and its consequences on science and vitalism. His concept of life stems from the idea of a living individual endowed with creative subjectivity and norms, a Kantian view which “disconcerts logic.” In contrast, we examine two naturalistic perspectives in the 1970s exploring the logic of life (Jacob) and the logic of the living individual (Maturana and Varela). Canguilhem can be considered to be a precursor of the second view, but there are divergences; for example, unlike them, he does not dismiss vitalism, often referring to it in his work, and even at times describing himself as a vitalist. The reason may lie in their different views of science.