bluuebunny/crossref_metadata_2025_split huggingface dataset:
Recent Synthetic Methods towards Graphdiyne
Authors: Hou Jiaheng , Sun Lishui , Pan Qingyan , Zhao Yingjie 
Published: July 2023

AbstractGraphdiyne (GDY) is an exclusive carbon allotrope with a two‐dimensional (2D) structure that can be synthesized in laboratory settings. Due to its distinctive 2D structure and excellent electronic properties, GDY has captured the great interest of researchers. In addition, the porous nature and high specific surface area of GDY afford numerous storage sites and channels, rendering it highly promising for diverse applications. The synthesis of GDY still faces a multitude of obstacles and challenges. Developing new synthesis methods towards high‐quality GDY is particularly significant. As such, we here presented an overview of the reported synthesis techniques for GDY, categorizing them into three distinct approaches: interfacial synthesis, solid‐phase synthesis, and solution‐phase synthesis. This comprehensive summary provides valuable references for addressing the persistent challenges in the synthesis of GDY. In the end, an outlook sheds light on future research of the GDY materials.
Tuned Transport Path of Perovskite MAPbI3‐based Memristor Structure
Authors: Doan Uyen Tu Thi , Le Duy Khanh , Huynh Truong Lam , Ngo Tung Thanh , Vo Trieu Quang , Thi Minh Thu Tran , Pham Anh Tuan Thanh , Tran Vinh Cao , Nguyen Phuong Tuyet , Pham Ngoc Kim 
Published: July 2023

AbstractIn this study, the features of resistive random access memory (RRAM) employing a straightforward Cr/MAPbI3/FTO three‐layer structure have been examined and clarified. The device displays various resistance switching (RS) behavior at various sweep voltages between 0.5 and 5 V. The RS effect has a conversion in the direction of the SET and RESET processes during sweeping for a number of cycles at a specific voltage. The directional change of the RS processes corresponds to the dominant transition between the generation/recombination of iodide ion and vacancy in the MAPbI3 perovskite layer and the electrochemical metallization of the Cr electrode under the influence of an electric field, which results in the conductive filament (CF) formation/rupture. At each stage, these processes are controlled by specific charge conduction mechanisms, including Ohmic conduction, space‐charge‐limited conduction (SCLC), and variable‐range hopping (VRH). By identifying the biased voltage and the quantity of voltage sweep cycles, one can take a new approach to control or modulate the pathways for effective charge transport. This new approach is made possible by an understanding of the RS characteristics and the corresponding mechanisms causing the variation of RS behavior in the structure.
Photo‐Lipids: Light‐Sensitive Nano‐Switches to Control Membrane Properties
Authors: Socrier Larissa , Steinem Claudia 
Published: July 2023

AbstractBiological membranes are described as a complex mixture of lipids and proteins organized according to thermodynamic principles. This chemical and spatial complexity can lead to specialized functional membrane domains enriched with specific lipids and proteins. The interaction between lipids and proteins restricts their lateral diffusion and range of motion, thus altering their function. One approach to investigating these membrane properties is to use chemically accessible probes. In particular, photo‐lipids, which contain a light‐sensitive azobenzene moiety that changes its configuration from trans‐ to cis‐ upon light irradiation, have recently gained popularity for modifying membrane properties. These azobenzene‐derived lipids serve as nanotools for manipulating lipid membranes in vitro and in vivo. Here, we will discuss the use of these compounds in artificial and biological membranes as well as their application in drug delivery. We will focus mainly on changes in the membrane's physical properties as well as lipid membrane domains in phase‐separated liquid‐ordered/liquid‐disordered bilayers driven by light, and how these changes in membrane physical properties alter transmembrane protein function.
Low‐Symmetry Macrocycles and Cages for Carbohydrate Recognition
Authors: Manick Anne‐Doriane , Dutasta Jean‐Pierre , Martinez Alexandre 
Published: July 2023

AbstractThe recognition of carbohydrate plays a key role in numerous biological processes. Thus, artificial receptors have been synthesized to mimic these biological systems. To date, most of the receptors reported for carbohydrate complexation present highly symmetrical cavities, probably because their syntheses require less synthetic efforts and are easier to achieve and control. However, carbohydrates display complex, asymmetrical structures suggesting that hosts with low symmetry might be more adapted to recognize these guests. Here, we described the strategies that have been used to complex carbohydrates with macrocycles and cages presenting low symmetry and the potential of this approach. Self‐assembled cages are first described, then covalent macrocycles and cages are presented and for each example the binding properties of low‐symmetry systems are compared to those of their higher‐symmetry counterparts.
How firms leverage corporate environmental strategy to nurture green behavior: Role of multi‐level environmentally responsible leadership
Authors: Faraz Naveed Ahmad , Ahmed Fawad , Xiong Zhengde 
Published: July 2023

AbstractThe implementation of a firm's corporate environmental strategy is contingent on a practical mechanism between leaders and employees as stakeholders to spread a collective stimulus of responsible behaviors from top to bottom. This study builds on the theoretical underpinnings of social identity theory to examine the influence of corporate environmental strategy on employees' voluntary green behavior through the mediating role of middle managers' environmentally responsible leadership and the moderating role of CEOs' environmentally responsible leadership. The sample included 1532 middle managers‐subordinate dyads from 91 automotive firms and their supply chain business partners in China. Multi‐source data on CEOs' and managers' environmentally responsible leadership and employees' voluntary green behavior were collected in two stages and analyzed with multilevel structural equation modeling through the MPlus 8.3 software. The findings supported all the hypothesized relationships in predicting employees' voluntary green behavior, including the mediating and moderating mechanisms. Theoretical and managerial implications are offered, along with limitations and suggestions for future research.
Feedback and PT symmetry in a class of active LCR circuits
Authors: Mayosky Miguel , Veiga Alejandro , Canal Carlos García , Fanchiotti Huner 
Published: July 2023

SummarySystems with non‐Hermitian Hamiltonians, especially those exhibiting parity‐time (
) symmetry, are of particular interest as they can describe physical open systems with balanced loss into and gain from the environment. In this context, the study of eigenvalue locations and the corresponding phase transitions as a function of the degree of non‐Hermiticity are accomplished hereby using feedback theory. This approach provides insight about the behavior of these systems and allows generalization of the results for higher‐order ones. The proposed ideas are analyzed in detail for a class of coupled resonant circuit chains.
Electromagnetic band gap coupled tri‐notched miniaturized ultra‐wideband antenna loaded with slot and parasitic strip
Authors: Mukherjee Surajit , Roy Avisankar , Maity Smarajit , Tewary Tapas , Dutta Koushik , Bhunia Sunandan 
Published: July 2023

SummaryAn electromagnetic band gap (EBG) coupled miniaturized tri‐notched printed ultra‐wideband (UWB) monopole microstrip antenna having dimensions of 22 mm × 26 mm × 1.6 mm loaded with a slot in radiating patch and a parasitic strip in the ground plane has been presented. The proposed structure incorporates a square‐shaped metallic radiating patch with a square EBG structure adjacent to the microstrip feed line, a U‐shaped meandered slot over the radiating element, and a U‐shaped parasitic resonator at the ground plane beneath the radiating element, to reject the C‐band satellite downlink (3.7 to 4.2 GHz), WLAN frequency band (5.15 to 5.85 GHz), and X‐band satellite downlink (7.25 to 7.75 GHz) frequency bands, respectively. The designed antenna operates in the frequency range from 3 to 11.1 GHz, with an impedance bandwidth of 8.1 GHz and a percentage bandwidth of 114%. Modification steps incorporating into the reference antenna to achieve the desired design objectives have been discussed, along with parametric studies. The proposed design has been simulated using Ansys HFSS, and measurement has been taken using standard measurement technique and compared with the simulated results.
Pioneer tree species accelerate restoration of tree‐related microhabitats in 50‐year‐old reserves of Białowieża Forest, Poland
Authors: Spînu Andreea Petronela , Mysiak Weronika , Bauhus Jürgen , Bielak Kamil , Niklasson Mats 
Published: July 2023

AbstractRetention of structural elements such as deadwood and habitat trees at the level of forest stands has been promoted to integrate biodiversity conservation into multiple‐use forest management. The conservation value of habitat trees is largely determined by the presence, richness, and abundance of tree‐related microhabitats (TreMs). Since TreMs are often lacking in intensively managed forests, an important question of forest conservation is how the abundance and richness of TreMs may be effectively restored. Here, we investigated whether the strict protection of forest through cessation of timber harvesting influenced TreM occurrence at tree and stand levels. For that purpose, we compared four managed and four set‐aside stands (0.25 ha each) in the Białowieża Forest, with identical origin following clear‐cuts approximately 100 years ago. We found that the abundance and richness of TreMs on living trees were not significantly different between stands that were either conventionally managed or where active forest management ceased 52 years ago. Yet, our analysis of TreMs on tree species with contrasting life‐history traits revealed that short‐lived, fast‐growing species (pioneers) developed TreMs quicker than longer‐lived, slower‐growing species. Hence, tree species such as Populus or Betula, which supply abundant and diverse TreMs, can play an important role in accelerating habitat restoration.
The genetic structure and demographic history ofZabelia tyaihyonii, endemic to Korean limestone karst forests, based on genome‐wide SNP markers
Authors: Choi In‐Su , Han Eun‐Kyeong , Wojciechowski Martin F. , Heo Tae‐Im , Park Jong‐Soo , Yang Jong‐Cheol , Gantsetseg Amarsanaa , Cheon Kyeong‐Sik , Tamaki Ichiro , Lee Jung‐Hyun 
Published: July 2023

AbstractSimilar to the global phenomenon, many plant species endemic to Korean limestone karst forests are at risk of extinction due to human intervention.Zabelia tyaihyoniiis a familiar shrub, called “Hardy abelia” and “Fragrant abelia” growing in the karst forests of Korea, where it is one of the most threatened species. We investigated the genetic structure and demographic history ofZ. tyaihyonii, which allow us to develop appropriate conservation and management strategies. The genetic structure was evaluated using a total of 187 samples from 14 populations, covering the entire distribution ofZ. tyaihyoniiin South Korea. We utilized 254 and 1753 SNP loci obtained via MIG‐seq (Multiplexed ISSR Genotyping by sequencing) for structure and demographic analyses, respectively. The population demographic modeling was performed with site frequency spectrum. To gain further historical insights, we also employed ENM (Ecological Niche Modeling). We found two distinct clusters (CLI and CLII) of ancient origin (ca. 490 ka). Despite CLII experiencing a more severe bottleneck, both clusters showed similar levels of genetic diversity, indicating mutual historical gene flow. Their historical distribution range seems to have changed very little. We proposed a historical distribution scenario forZ. tyaihyonii, taking into account its intrinsic factors, and emphasized a more complex response to Quaternary climate change beyond simple allopatric speciation models. These findings provide valuable insights for conservation and management strategies forZ. tyaihyonii.
Ocean connectivity and habitat characteristics predict population genetic structure of seagrass in an extreme tropical setting
Authors: Hernawan Udhi E. , van Dijk Kor‐jent , Kendrick Gary A. , Feng Ming , Berry Oliver , Kavazos Christopher , McMahon Kathryn 
Published: July 2023

AbstractUnderstanding patterns of gene flow and processes driving genetic differentiation is important for a broad range of conservation practices. In marine organisms, genetic differentiation among populations is influenced by a range of spatial, oceanographic, and environmental factors that are attributed to the seascape. The relative influences of these factors may vary in different locations and can be measured using seascape genetic approaches. Here, we applied a seascape genetic approach to populations of the seagrass, Thalassia hemprichii, at a fine spatial scale (~80 km) in the Kimberley coast, western Australia, a complex seascape with strong, multidirectional currents greatly influenced by extreme tidal ranges (up to 11 m, the world's largest tropical tides). We incorporated genetic data from a panel of 16 microsatellite markers, overwater distance, oceanographic data derived from predicted passive dispersal on a 2 km‐resolution hydrodynamic model, and habitat characteristics from each meadow sampled. We detected significant spatial genetic structure and asymmetric gene flow, in which meadows 12–14 km apart were less connected than ones 30–50 km apart. This pattern was explained by oceanographic connectivity and differences in habitat characteristics, suggesting a combined scenario of dispersal limitation and facilitation by ocean current with local adaptation. Our findings add to the growing evidence for the key role of seascape attributes in driving spatial patterns of gene flow. Despite the potential for long‐distance dispersal, there was significant genetic structuring over small spatial scales implicating dispersal and recruitment bottlenecks and highlighting the importance of implementing local‐scale conservation and management measures.
Flexible “V‐Shaped” Dibenzimidazole Amphiphile: Metal Ion‐Driven Microenvironment‐Sensitive Reversible Supramolecular Assembly in Aqueous Medium
Authors: Mondal Sourav , Dey Nilanjan 
Published: July 2023

AbstractFlexible dibenzimidazole based amphiphilic probe with indole as terminal residue has been synthesized using simple one‐step oxidative condensation. The compound formed nanoaggregates in the aqueous medium probably via extended intermolecular hydrogen bonding network involving benzimidazole moieties. The compound in monomer form (in THF) showed metal ion‐induced bathochromic shift, while in aggregate state (in water) metal coordination leads to hypsochromic shift. Moreover, in THF medium, compound interacts with large number of metal ions, whereas optical response was specifically observed with Hg2+ and Ag+ in the aqueous medium. Discrimination between Hg2+ and Ag+ was achieved using chloride as masking agent. Mechanistic investigations indicate formation of coordination‐driven supramolecular assembly where both benzimidazole and indole moieties participate in metal ion binding. The changes in microenvironment, such as local hydrophobicity, pH etc. showed distinct impact on metal ion sensing properties, both in terms of selectivity and sensitivity. Finally, the quantitative estimation of mercury, beyond its permissible level, was achieved in various natural water samples.
The Influence of Water in the Vapor‐Assisted Conversion Synthesis of UiO‐67 MOF Thin Films
Authors: Gschwind Wanja , McCarthy Brian D. , Suremann Nina F. , Ott Sascha 
Published: July 2023

AbstractWater is known to play an important role for the crystallization and stability of Zr‐based metal‐organic frameworks (MOFs). This work investigates its effect on the vapor‐assisted conversion (VAC) synthesis of UiO‐67 MOF thin films on Au‐coated Si substrates. We demonstrate the equilibration processes taking place during the VAC procedure, confirming the gradual equilibration of all solutions upon heating. The presence of water affects the vapor phase composition but does not significantly impact the acetic acid equilibration rate. However, the preparation of UiO‐67 thin films by VAC is highly sensitive to the water content in the reaction. Some water is required for the formation of the zirconium clusters, but excessive water in the reaction vial yields poorly crystalline materials. Atmospheric water that is taken up by the vapor source can be sufficient to reduce crystallinity dramatically. This complication can be partially overcome by increasing the amount of acetic acid in the vapor source.
Active power control strategy based on characteristic curve fitting for photovoltaic sources
Authors: Cai Hongda , Yang Pengcheng , Wang Yu , Wei Wei , Li Jing , Zhou Yongzhi 
Published: July 2023

AbstractWith the explosive growth of photovoltaic (PV) penetration, there is an increasingly urgent expectation for PV sources to provide a full range of ancillary services to the utility. The most critical issue for a PV source to support the power system is the flexible power regulating capability, whereas the PV sources generally operates in the maximum power point tracking (MPPT) mode to maximize the solar harvest. This paper proposes an active power control strategy for PV sources based on a characteristic curve fitting method. With the proposed control strategy, PV sources can operate in the MPPT mode or adaptively switch to the power dispatch mode to flexibly regulate its output power to track the power reference. The characteristic curve fitting method does not require an irradiation sensor, but it has a more stable performance under rapid and continuous change in irradiation with simple calculation and error control since its extremely high similarity with the P–U characteristics of the PV source. Simulation is performed based on a detailed PV dynamic model to validate the proposed control strategy.
Optimization of heat transfer performance of a micro‐bare‐tube heat exchanger using a genetic algorithm
Authors: Li Shilong , Zhou Wenjie , Sangani Hersh A. , Wang Jian , Wang Jiajun 
Published: July 2023

AbstractThis study presents the optimization of the heat transfer coefficient of a micro bare tube heat exchanger. A physical and mathematical model of a micro bare tube heat exchanger was built in Matlab using the simplified ε‐number of transfer unit method. Using a temperature of minus 30°C and a 0.5–1.0 mm tube outer diameter, a 1.7–8.0 mm longitudinal tube pitch, a 1.7–5 mm transverse tube pitch, and a 1.0–5.0 m/s velocity at minimum free flow area, with carbon dioxide as the refrigerant, a comparative variation analysis was performed to optimize the heat transfer coefficient of a micro‐bare‐tube heat exchanger. The results demonstrate that the heat transfer coefficient increases as the inlet air velocity is increased from 1.0 to 5.0 m/s, with a final gain of 93.17%. The growth rate of the heat transfer coefficient steadily decreases with increasing inlet air velocity and gradually approaches zero. The effect of the gradual decrease of the tube outer diameter from 1.0 to 0.5 mm on the heat transfer coefficient is 22.52% greater than that of the gradual decrease of the transverse tube pitch from 2.2 to 1.7 mm. The study also carried out an optimization analysis on the distribution of four different variables in the heat exchanger. With the use of a genetic algorithm, the study found an optimal distribution to maximize the heat transfer coefficient. The following parameter values resulted in the maximum heat transfer coefficient: a maximum inlet air velocity of 5.0 m/s, a minimum tube outer diameter of 0.5 mm, a 1.7 mm longitudinal tube pitch, and a 1.7 mm transverse tube pitch.
A methodology to designate radiation‐controlled areas in decommissioning nuclear power plants
Authors: Kim Seongjun , Kong Tae Young , Choi Woo Seok , Son Jinho , Kim Hwapyoung , Song Changju , Kim Jiung , Yang Ki Tae , Song Jong Soon , Kim Hee Geun 
Published: July 2023

AbstractKori Unit 1, which was permanently shut down in 2017, is expected to be the first decommissioned commercial nuclear power plant (NPP) in Korea. Operating NPPs designate radiation‐controlled areas (RCAs) to protect workers from radiological hazards and provide appropriate measures. Decommissioning RCAs (DRCAs) in NPPs being decommissioned should also be designated by considering the radiological characteristics of workplaces and exposure routes of decommissioning workers, such as external and internal exposure. However, the criteria for the DRCAs in decommissioning Kori Unit 1 are presently the same as those during normal operation, according to the public‐hearing material of the final decommissioning plan for Kori Unit 1. This study analyzed criteria for RCAs in all Korean NPPs to propose criteria for DRCAs in decommissioning NPPs. Analysis results show that RCAs are classified into four, five, six, and eight zones in Korean pressurized water reactors with respective external radiation dose rates. The RCAs in Korean pressurized heavy water reactors are classified into six zones with external dose rates and derived air concentrations of tritium. This study proposes three classifications of DRCAs to keep occupational exposure as low as reasonably achievable while considering potential exposure routes, that is, external exposure, airborne contamination, and surface contamination areas. First, the external exposure areas are classified into several zones according to the levels of external radiation dose rates. Second, the airborne contamination areas are designated to prevent internal exposure to workers from the inhalation of radioactive material in the air during cutting and demolition. Last, the surface contamination areas are designated to minimize the skin contamination of workers as radioactive dust in the air is deposited on the surface of facilities and equipment over time.
Methods of extraction of bioactive compounds fromTerminalia Chebula(Haritaki) and their application in food and pharmaceutical industry: A review
Authors: Jha Avinash K. , Sit Nandan 
Published: July 2023

AbstractMedicinal plants are an integral element of human society's effort to battle illness.Terminalia chebulaRetz. (Haritaki) is known in China as the “King of Medicine” and is usually at the top of the list of “Ayurvedic Material Medica” due to its incredible healing potential. The whole plant has great medicinal potential and has traditionally been used to cure a variety of human diseases. The global need for herbal medicines is continuously growing. For the most part, the Indian medical system relies on herbal remedies to treat illnesses. A significant number of pharmacological research on diverse medicinal plants have been done widely across the world where haritaki has been the subject of a lot of research in recent years. In addition, more research is needed to fully utilize its therapeutic potential in other medical conditions. More studies of this medication's bioactivity, mechanism of action, pharmacotherapeutics, toxicity, standardization, preclinical investigations, and clinical trials are needed for its global safe usage. In the present effort, chemical constituents, and bioactive properties of haritaki have been reviewed in detail with a brief description of extraction methods of bioactive compounds and applications.