bluuebunny/crossref_metadata_2025_split huggingface dataset:
Chorological news for Carex (Cyperaceae) in the Iberian Peninsula
Authors: Martín-Bravo Santiago , Benítez-Benítez Carmen , Buira Antoni , García-Moro Pablo , Gutiérrez Leonardo , Marco-Rosado Nuria , Morales-Alonso Ana , Míguez Mónica , Salazar-Mendías Carlos , Sanz-Arnal María , Jiménez-Mejías Pedro 
Published: June 2023

Se presentan diversas notas corológicas del género Carex para la península ibérica, que incluyen novedades provinciales para cuatro especies (C. elata subsp. elata, C. demissa subsp. demissa, C. oedipostyla, C. sylvatica subsp. sylvatica) así como la confirmación provincial (no indicada en Flora iberica) de la presencia de tres taxónes. Proporcionamos asimismo la segunda cita nacional para Portugal de C. reuteriana subsp. mauritanica. Otras tres citas poseen interés corológico al constituir novedades comarcales y/o de sector biogeográfico, o bien segunda cita provincial. Cinco de las novedades revisten interés conservacionista por tratarse de especies o poblaciones amenazadas, incluidas en Listas Rojas y/o protegidas a nivel legal. Por último, hacemos referencia a la posible naturalización de C. pendula.
Various chorological notes for the genus Carex in the Iberian Peninsula are presented, including new provincial records for four species (C. elata subsp. elata, C. demissa subsp. demissa, C. oedipostyla, C. sylvatica subsp. sylvatica), as well as provincial confirmations (not indicated in Flora iberica) for the presence of three taxa. We also provide the second national report for Portugal of C. reuteriana subsp. mauritanica. Three additional reports have chorological interest by constituting new regional and/or biogeographic records, or the second provincial report. Five of the novelties are of conservation concern because they imply endangered species or populations, included in Red Lists and/or legally protected. Finally, we refer to the possible naturalization of C. pendula.
The Servant Leadership Effect on Student Engagement Mediated by Student Motivation at "X" Christian Senior High School in Surabaya
Authors: Wiwik Damiana , Ricky Ricky , Tarigan Zeplin Jiwa Husada 
Published: June 2023

This study aims to determine the effect of Servant Leadership (Voluntary Subordination (VS), Authentic Self (AS), Covenantal Relationship (CR), Responsible morality (RM), Transcendental spirituality (TS), Transforming Influence (TI)) on teachers on Student Engagement (SE) mediated by Student Motivation (SM) at "X" Christian Senior High School in Surabaya. This research method is causal-comparative quantitative, and the research respondents are 201 students in the 11th grade of the science study program. Partial Least Square (SmartPLS) version 3.0 is the data analysis method. This indicated that VS significantly affected SE. Authentic Self significantly affected SE. CR didn't significantly affect SE. However, RM significantly affected SE, TS significantly affected SE, and TI significantly affected SE. The mediating variables: VS, AS, CR, RM, TS, and TI. Furthermore, School management needs to improve their professional relations with students and develop themselves to bring positive changes to students, increasing SE in the learning process.
Dynamic Mechanical Analysis
Authors: Menard Benjamin , Menard Kevin P. , Menard Noah 
Published: June 2023

AbstractDynamic mechanical analysis(DMA) is applying a stress or strain to a sample at controlled frequencies and analyzing the response to obtain phase angle and deformation data. These data allow the calculation of the damping or tan delta (δ) as well as complex modulus and viscosity data. Two approaches are used: (i) forced frequency, where the signal is applied at a set frequency, and (ii) free resonance, where the material is perturbed and allowed to exhibit free resonance decay. Most DMAs are of the former type, while thetorsional braid analyzer(TBA) is of the latter type. In both approaches, the technique is very sensitive to the motions of the polymer chains, and it is a powerful tool for measuring transitions in polymers. More specialized techniques, such as the use of ultrasonics and laser pulses, do exist in specialized markets. It is estimated to be 100 times more sensitive to the glass transition thandifferential scanning calorimetry(DSC), and it resolves other more localized transitions, such as side chain movements that are not detected in the DSC. In addition, the technique allows the rapid scanning of a material's modulus and viscosity as a function of temperature, strain, or frequency. DMA may also be referred to asdynamic mechanical, thermal analysis(DMTA),dynamic mechanical spectroscopy(DMS), ordynamic thermomechanical analysis(DTMA).
Narrowband Organic Afterglow via Phosphorescence Förster Resonance Energy Transfer for Multifunctional Applications
Authors: Zou Xin , Gan Nan , Dong Mengyang , Huo Wenguang , Lv Anqi , Yao Xiaokang , Yin Chengzhu , Wang Ziyang , Zhang Yuanyuan , Chen Huan , Ma Huili , Gu Long , An Zhongfu , Huang Wei 
Published: June 2023

AbstractAchieving multicolor organic afterglow materials with narrowband emission and high color purity is important in various optoelectronic fields but remains a great challenge. Here, an efficient strategy is presented to obtain narrowband organic afterglow materials via Förster resonance energy transfer from long‐lived phosphorescence donors to narrowband fluorescence acceptors in a polyvinyl alcohol matrix. The resulting materials exhibit narrowband emission with a full width at half maximum (FWHM) as small as 23 nm and the longest lifetime of 721.22 ms. Meanwhile, by pairing the appropriate donors and acceptors, multicolor and high color purity afterglow ranging from green to red with the maximum photoluminescence quantum yield of 67.1% are achieved. Moreover, given their long luminescence lifetime, high color purity, and flexibility, the potential applications are demonstrated in high‐resolution afterglow displays and dynamic and quick information identification in low‐light conditions. This work provides a facile approach for developing multicolor and narrowband afterglow materials as well as expands the features of organic afterglow.
Cobalt(III)‐Catalyzed Aerobic Diamination of α‐Alkyl Styrenes with Anilines
Authors: Yang Jinglei , Wu Yun‐Dong , Pu Maoping 
Published: June 2023

AbstractA commercially available cobalt complex Cp*CoIII(CO)I2 has been found to effectively catalyze the diamination of α‐alkyl styrenes with anilines under a mild reaction condition, using dioxygen as the oxidant. This reaction features a reasonably good substrate scope of amines and a good functional group tolerance. Preliminary mechanistic studies have shown that Cp*CoIII(CO)I2 alone can promote the diamination reaction.
Lysine 68 Methylation‐Dependent SOX9 Stability Control Modulates Chondrogenic Differentiation in Dental Pulp Stem Cells
Authors: Sun Qiannan , Zhuang Zimeng , Bai Rushui , Deng Jie , Xin Tianyi , Zhang Yunfan , Li Qian , Han Bing 
Published: June 2023

AbstractDental pulp stem cells (DPSCs), characterized by easy availability, multi‐lineage differentiation ability, and high proliferation ability, are ideal seed cells for cartilage tissue engineering. However, the epigenetic mechanism underlying chondrogenesis in DPSCs remains elusive. Herein, it is demonstrated that KDM3A and G9A, an antagonistic pair of histone‐modifying enzymes, bidirectionally regulate the chondrogenic differentiation of DPSCs by controlling SOX9 (sex‐determining region Y‐type high‐mobility group box protein 9) degradation through lysine methylation. Transcriptomics analysis reveals that KDM3A is significantly upregulated during the chondrogenic differentiation of DPSCs. In vitro and in vivo functional analyses further indicate that KDM3A promotes chondrogenesis in DPSCs by boosting the SOX9 protein level, while G9A hinders the chondrogenic differentiation of DPSCs by reducing the SOX9 protein level. Furthermore, mechanistic studies indicate that KDM3A attenuates the ubiquitination of SOX9 by demethylating lysine (K) 68 residue, which in turn enhances SOX9 stability. Reciprocally, G9A facilitates SOX9 degradation by methylating K68 residue to increase the ubiquitination of SOX9. Meanwhile, BIX‐01294 as a highly specific G9A inhibitor significantly induces the chondrogenic differentiation of DPSCs. These findings provide a theoretical basis to ameliorate the clinical use of DPSCs in cartilage tissue‐engineering therapies.
A Self‐Powered and Self‐Sensing Lower‐Limb System for Smart Healthcare
Authors: Kong Lingji , Fang Zheng , Zhang Tingsheng , Zhang Zutao , Pan Yajia , Hao Daning , Chen Jiangfan , Qi Lingfei 
Published: June 2023

AbstractIn the age of the artificial intelligence of things (AIoT), wearable devices have been extensively developed for smart healthcare. This paper proposes a self‐powered and self‐sensing lower‐limb system (SS‐LS) with negative energy harvesting and motion capture for smart healthcare. The SS‐LS achieves self‐sustainability via a half‐wave electromagnetic generator (HW‐EMG) that recovers negative work from walking with a low cost of harvesting. Additionally, the motion capture function of the system is achieved by the three‐channel triboelectric nanogenerator (TC‐TENG) based on binary code, which can accurately detect the angle and direction of the knee joint rotation. The bench test experiment indicates that the HW‐EMG has an average output power of 11.2 mW, sufficient to power a wireless sensor. The three‐channel voltage signal of TC‐TENG fits well with the binary signal, which can precisely detect the angle and direction of rotation. Furthermore, the SS‐LS demonstrates an identification accuracy of 99.68% and a motion detection accuracy of 99.96% based on an LSTM deep learning model. Demonstrations of Parkinson's disease and fall detection and monitoring of three training modes (sit‐and‐stand, balance, and walking training) are also performed, which exhibit outstanding sensing capabilities. The SS‐LS is highly promising in sports rehabilitation medicine and can contribute to the development of smart healthcare.
Fundamental Understanding of Structural Reconstruction Behaviors in Oxygen Evolution Reaction Electrocatalysts
Authors: Zhong Haoyin , Zhang Qi , Yu Junchen , Zhang Xin , Wu Chao , Ma Yifan , An Hang , Wang Hao , Zhang Jun , Wang Xiaopeng , Xue Junmin 
Published: June 2023

AbstractTransition metal‐based oxyhydroxides (MOOH) derived from the irreversible structural reconstruction of precatalysts are often acknowledged as the real catalytic species for the oxygen evolution reaction (OER). Typically, the reconstruction‐derived MOOH would exhibit superior OER activity compared to their directly synthesized counterparts, despite being fundamentally similar in chemistry. As such, structural reconstruction has emerged as a promising strategy to boost the catalytic activity of electrocatalysts. However, the in‐depth understanding of the origin of the superior OER activity of reconstructed materials still remains ambiguous, which significantly hinders the further developments of highly efficient electrocatalysts based on structural reconstruction chemistry. In this review, a comprehensive overview of the structural reconstruction behaviors in the reported reconstruction‐derived electrocatalysts is provided and the intrinsic chemical and structural origins of their high efficiency toward OER are unveiled. The fundamentals of structural reconstruction mechanisms, along with the recommended characterization techniques for the understanding of the dynamic structural reconstruction process and analyzing the structure of real catalytic species are also interpreted. Finally, in view of structural reconstruction chemistry, the potential perspectives to facilitate the design and synthesis of highly efficient and durable OER electrocatalyst are presented.
Essential updates 2021/2022: Perioperative and surgical treatments for gastric and esophagogastric junction cancer
Authors: Yanagimoto Yoshitomo , Kurokawa Yukinori , Doki Yuichiro 
Published: June 2023

AbstractIn recent years, important clinical trials for gastric cancer (GC) and esophagogastric junction cancer (EGJC) have been reported, changing the strategies of surgical and perioperative treatment. Although laparoscopic gastrectomy has already been shown to be effective for early‐stage cancer, recent evidence from both Asia (JLSSG0901, CLASS‐01 and KLASS‐02) and Europe (LOGICA and STOMACH trials) has demonstrated that it is useful for advanced GC. Robotic surgery has been rapidly gaining popularity in recent years, and randomized controlled trials are ongoing to evaluate its efficacy. A prospective nationwide multicenter study mapped sites with frequent metastasis and revealed lymphatic flow specific to EGJC, thus establishing the optimal lymph node dissection area and surgical approach based on esophageal involvement. Perioperative chemotherapy, the mainstay of treatment in Europe, also has been established in Asia by the PRODIGY and RESOLVE studies. New clinical trials have been conducted to evaluate the efficacy of combining immunotherapy or molecular‐targeted therapy with perioperative chemotherapy or chemoradiotherapy. In this review, we present important recent clinical trials regarding the treatment of GC and EGJC published in 2021 or 2022.
A nonsense variant in the N‐terminal acetyltransferase NAA30 may be associated with global developmental delay and tracheal cleft
Authors: Varland Sylvia , Brønstad Kirsten Marie , Skinner Stephanie J. , Arnesen Thomas 
Published: June 2023

AbstractMost human proteins are N‐terminally acetylated by N‐terminal acetyltransferases (NATs), which play crucial roles in many cellular functions. The NatC complex, comprising the catalytic subunit NAA30 and the auxiliary subunits NAA35 and NAA38, is estimated to acetylate up to 20% of the human proteome in a co‐translational manner. Several NAT enzymes have been linked to rare genetic diseases, causing developmental delay, intellectual disability, and heart disease. Here, we report a de novo heterozygous NAA30 nonsense variant c.244C>T (p.Q82*) (NM_001011713.2), which was identified by whole exome sequencing in a 5‐year‐old boy presenting with global development delay, autism spectrum disorder, hypotonia, tracheal cleft, and recurrent respiratory infections. Biochemical studies were performed to assess the functional impact of the premature stop codon on NAA30's catalytic activity. We find that NAA30‐Q82* completely disrupts the N‐terminal acetyltransferase activity toward a classical NatC substrate using an in vitro acetylation assay. This finding corresponds with structural modeling showing that the truncated NAA30 variant lacks the entire GNAT domain, which is required for catalytic activity. This study suggests that defective NatC‐mediated N‐terminal acetylation can cause disease, thus expanding the spectrum of NAT variants linked to genetic disease.
Theoretical Quantification of the Lewis Acidity of N‐Heterocyclic Iodonium Salts
Authors: Su Jiaqi , Liu Yubang , Jing Yaru , Liu Yan , Ke Zhuofeng 
Published: June 2023

AbstractThe quantitative Lewis acidity of N‐heterocyclic iod(az)olium salts is helpful for their further application in organic chemistry. The acidity scales of different N‐Heterocyclic iodonium salts (NHISs) in acetonitrile are investigated using Density functional theory (DFT) studies. There are a total of 121N‐Heterocyclic iodonium salts that have been designed by combining N‐heterocyclic and iodonium salt structures in this research. Theoretical calculations systematically established the 31P NMR chemical shifts of NHISs, and the relative Lewis acidity scale was derived. The Lewis acidity trend is analyzed and explained by the natural population analysis (NPA) charges, molecular electrostatic potential, and the interaction between the iodonium center and the N‐heterocyclic substituents. This study is expected to provide a practical quantitative theoretical scale for the understanding and design of hypervalent iodine(III) reagents with versatile Lewis acidity.
Benzidine Derivatives: A Class of High Redox Potential Molecules for Aqueous Organic Flow Batteries
Authors: Liu Xianghui , Li Tianyu , Zhang Changkun , Li Xianfeng 
Published: June 2023

AbstractThe development of water‐soluble redox‐active molecules with high potentials is one of the effective ways to enhance the energy density of aqueous organic flow batteries (AOFBs). Herein, a series of promising N‐substituted benzidine analogues as water‐soluble catholyte candidates with controllable redox potentials (0.78–1.01 V vs. standard hydrogen electrode (SHE)) were obtained by the molecular engineering of aqueous irreversible benzidines. Theoretical calculations reveal that the redox potentials of these benzidine derivatives in acidic solution are determined by their electronic structure and alkalinity. Among these benzidine derivatives, N,N,N′,N′‐tetraethylbenzidine(TEB) shows both high redox potential (0.82 V vs. SHE) and good solubility (1.1 M). Pairing with H4[Si(W3O10)4] anolyte, the cell displayed discharge capacity retention of 99.4 % per cycle and a high coulombic efficiency (CE) of ~100 % over 1200 cycles. The stable discharge capacity of 41.8 Ah L−1 was achieved at the 1.0 M TEB catholyte with a CE of 97.2 % and energy efficiency (EE) of 91.2 %, demonstrating that N‐substituted benzidines could be promising for AOFBs.
Compartmentalized Polyampholyte Microgels by Depletion Flocculation and Coacervation of Nanogels in Emulsion Droplets
Authors: Mathews Hannah F. , Pieper Maria I. , Jung Se‐Hyeong , Pich Andrij 
Published: June 2023

AbstractIn pH‐responsive drug carriers, the distribution of charges has been proven to affect delivery efficiency but is difficult to control and verify. Herein, we fabricate polyampholyte nanogel‐in‐microgel colloids (NiM−C) and show that the arrangement of the nanogels (NG) can easily be manipulated by adapting synthesis conditions. Positively and negatively charged pH‐responsive NG are synthesized by precipitation polymerization and labelled with different fluorescent dyes. The obtained NG are integrated into microgel (MG) networks by subsequent inverse emulsion polymerization in droplet‐based microfluidics. By confocal laser scanning microscopy (CLSM), we verify that depending on NG concentration, pH value and ionic strength, NiM−C with different NG arrangements are obtained, including Janus‐like phase‐separation of NG, statistical distribution of NG, and core–shell arrangements. Our approach is a major step towards uptake and release of oppositely charged (drug) molecules.
Tailoring the performance of poly(lactic acid)‐based reactive blends: The effect of vinyl acetate and dicumyl peroxide content
Authors: Ferreira Eduardo da Silva Barbosa , do Nascimento Emanuel Pereira , Luna Carlos Bruno Barreto , dos Santos Filho Edson Antonio , Wellen Renate Maria Ramos , Araújo Edcleide Maria 
Published: June 2023

AbstractPoly(lactic acid) has been gaining prominence in academia and industry, mainly due to being a biopolymer and biodegradable material. Nevertheless, mainly due to its high fragility, work has been carried out in order to seek alternatives to improve this drawback. Hence, this work aims to evaluate the effect of the vinyl acetate content using two types of EVA (EVA1 with 28% and EVA2 with 19%) in dynamically vulcanized PLA/EVA blends, using several dicumyl peroxide (DCP) contents, that is, 0.3, 0.5, and 0.7 phr. Blends were produced using an internal mixer, and the tensile, impact and HDT specimens were injection molded. By FTIR and torque rheometry, it was verified that, upon DCP addition, there was evidences of reticulation, resulting in crosslinked PLA, crosslinked EVA, as well as PLA‐g‐EVA. Through tensile and impact strength tests, it was observed substantial increases in the elongation at break, and in impact strength, mainly for the compounds with higher content of vinyl acetate (EVA1). Impact specimens made with PLA/EVA120 0.7 DCP, PLA/EVA130 0.5 DCP, and 0.7 DCP, did not completely break, due to the probable development of the in situ PLA‐g‐EVA compatibilizer among the present phases. Therefore, it is believed that a more homogeneous microstructure was obtained, as observed by SEM images, highlighted upon the DCP content increase. It was verified that the highest vinyl acetate content is of paramount importance for obtaining PLA/EVA blends with better compatibility as well as EVA1 being more susceptible to crosslinking using DCP, resulting in blends with greater toughness.
A facile approach to fabricating fluorine‐free superhydrophobic cotton fabric with excellent oil–water separation performance
Authors: Xu Junhuang , Li Hongqiang , Zheng Longzhu , Huang Shangdong , Fang Weizhen , Lai Xuejun , Zeng Xingrong 
Published: June 2023

AbstractWith the increasing deterioration of environmental and ecology caused by industrial wastewater pollution and petroleum spill accidents, superhydrophobic materials for oil–water separation have attracted considerable attention. Herein, we propose a facile approach to fabricate fluorine‐free superhydrophobic cotton fabric (CF) for oil–water separation after the coverage of chitosan (CS) and titanium dioxide (TiO2) nanoparticles and the subsequent hydrophobization modification by hexadecyltrimethoxysilane (HDTMS). The obtained HDTMS‐TiO2/CS@CF showed superhydrophobicity with a high water contact angle of 160.6° as well as excellent self‐cleaning capability, non‐adhesion capability and surface stability. Moreover, the CF was successfully applied for the separation of various oil–water mixtures. The separation efficiency for trichloromethane‐water mixture reached 95.8%, and still maintained 95.6% after 30 separation cycles. In addition, the CF also possessed superior photocatalytic degradation capability for organic contaminant such as oil red O and the degradation rate was 86.2% under UV irradiation for 180 min. The preparation method in this work is simple, environmentally friendly, low‐cost, and easy to produce on a large scale. The findings conceivably stand out as a new method to fabricate superhydrophobic materials and show great application potential in the fields of oil–water separation and water purification.
A comparative analysis of photocatalytic applications using poly[(vanillin‐co‐pyrrole)]/ZnO and TiO2‐based semiconductor under natural sunlight irradiation
Authors: Lahouel Anas Abderrahmane , Mekidiche Mounir , Slimane Abdelkader , Sahli Nabahat 
Published: June 2023

AbstractThis study presents an experimental investigation with a comparative analysis on the photocatalytic activity of two composites, namely poly(vanillin‐co‐pyrrole)/ZnO and poly(vanillin‐co‐pyrrole)/TiO2, for the degradation of methylene blue (MB) dye under simulated solar irradiation. Conductive polymers, specifically poly(vanillin‐co‐pyrrole) (PPHMB) and its derivatives, were employed as photosensitizers to enhance the photocatalytic activity of ZnO and TiO2 under solar irradiation. PPHMB was synthesized using the cationic polycondensation method, while the PPHMB/ZnO and PPHMB/TiO2 composites were prepared through the co‐precipitation method. The prepared composites exhibited superior photocatalytic activity compared to bare ZnO and TiO2 under solar irradiation for the degradation of MB dye. Extensive characterization techniques, including Fourier‐transform infrared, x‐ray diffraction, thermogravimetric analysis, and optical analysis, were employed to investigate the properties of the composites. Various influential operational parameters such as initial dye concentration, irradiation time, and the dosage of PPHMB/ZnO and PPHMB/TiO2 composites were systematically studied to evaluate their effects on photocatalytic degradation. The optical density of dye degradation was quantified using a UV–Visible spectrophotometer, while the repeatability of the photocatalytic activity was rigorously assessed.