bluuebunny/crossref_metadata_2025 huggingface dataset:
Dynamic analysis and optimal control of knowledge diffusion model in regional innovation ecosystem under digitalization
Authors: He Zitong , Wang Haijun , Hu Yuhan , Ma Xiaolin , Zhao Huiyan
Published: June 2024

Knowledge diffusion in regional innovation ecosystems is an important factor that influences the regional innovation efficiency. In regional innovation ecosystems under digital empowerment, the knowledge diffusion enables the optimal allocation of innovation resources and promotes the sustainable development and ecological evolution of regional innovation ecosystems. In this paper, a SEIR (Susceptible–Exposed–Infected–Recovered) model is proposed for knowledge diffusion in regional innovation ecosystems under digitization. The basic reproduction number of the proposed model is calculated and its stability is validated. Finally, the expressions for the optimal control system and the optimal control parameters are presented. According to the research conclusions of this paper, the knowledge-diffusion ability of innovation agents in an innovation ecosystem affects the knowledge diffusion in a system; the contact rate between innovation agents affects the efficiency of knowledge diffusion in the system and the structure of the system; the digital transmission ability of innovation agents affects the breadth of knowledge diffusion in the system; and the self-learning ability of innovation agents affects the efficiency of knowledge diffusion in the system.The digital technologies help heterogeneous innovation agents in regional innovation ecosystems to break down the knowledge silos. At the same time, the digital technologies enhance the ability of innovation agents to absorb and learn knowledge in regional innovation ecosystems under digitization, thereby increasing the infection rate of knowledge diffusion in such systems.These conclusions extend the theoretical boundaries of innovation ecosystems and knowledge diffusion and offer management implications for enterprises and governments in decision-making.
Heteroatom-doped carbon dots from medicinal plants as novel biomaterials for as-use biomedical applications in comparison with synthetic drug, zaltoprofen
Authors: Kota Sobha , Dumpala Pradeep , Sajja Radhika , Anantha Ratnakumari
Published: June 2024

FN-doped carbon dots were synthesized using powdered leaves of Moringa oleifera L./Chromolaena odorata L./Tridax procumbens L./Tinospora cordifolia L./ and Lantana camara L., along with a precursor called 4,5-difluoro-1,2-benzenediamine (DFBD) and compared against the drug zaltoprofen derived carbon dots. They were assessed for their optical and structural characteristics using photoluminescence (optimal emission λ of 600 nm), vibrational (FTIR) spectroscopy (characteristic wave numbers of 1156 and 1269 cm−1 for C–F), as well as X-ray diffraction (XRD) (highest intensity at 27.56°) and high-resolution transmission electron microscopy (HR-TEM) (particles in the size range of 15–20 nm). Further, field emission scanning electron microscopy (FESEM) / energy dispersive spectroscopy (EDX) indicated FN doping of oval/oblong carbon dots. Membrane protection in percent is found to be 55.3 and 80.4 for FN-CDs and Z-FN-CDs respectively. The DPPH-free radical scavenging activity by FN-CDs was 69.4%, while with Z-FN-CDs, it was 54.2%. When tested on six bacterial strains (three each for gram-positive and gram-negative), the FN-CDs displayed a halo (ZOI) between 9 and 19 mm, whereas the Z-FN-CDs displayed a clearance zone between 9 and 17 mm. The FN-CDs showed significant emission-red-shift effects and demonstrated concentration-dependent biocompatibility and viability in neuroblastoma and beta-TC6-cell lines.
Gastroenterologist and surgeon perceptions of recommendations for optimal endoscopic localization of colorectal neoplasms
Authors: Johnson Garrett , Singh Harminder , Helewa Ramzi M. , Sibley Kathryn M. , Reynolds Kristin A. , El-Kefraoui Charbel , Doupe Malcolm B.
Published: June 2024

National consensus recommendations have recently been developed to standardize colorectal tumour localization and documentation during colonoscopy. In this qualitative semi-structured interview study, we identified and contrast the perceived barriers and facilitators to using these new recommendations according to gastroenterologists and surgeons in a large central Canadian city. Interviews were analyzed according to the Consolidated Framework for Implementation Research (CFIR) through directed content analysis. Solutions were categorized using the Expert Recommendations for Implementing Change (ERIC) framework. Eleven gastroenterologists and ten surgeons participated. Both specialty groups felt that the new recommendations were clearly written, adequately addressed current care practice tensions, and offered a relative advantage versus existing practices. The new recommendations appeared appropriately complex, applicable to most participants, and could be trialed and adapted prior to full implementation. Major barriers included a lack of relevant external or internal organizational incentives, non-existing formal feedback processes, and a lack of individual familiarity with the evidence behind some recommendations. With application of the ERIC framework, common barriers could be addressed through accessing new funding, altering incentive structures, changing record systems, educational interventions, identifying champions, promoting adaptability, and employing audit/feedback processes. Future research is needed to test strategies for feasibility and effectiveness.
An immunogenic cell death-related lncRNA signature correlates with prognosis and tumor immune microenvironment in bladder cancer
Authors: Luo Jinhong , Luo Feiye , Li Qin , Liu Qinghong , Wang Jinshan
Published: June 2024

Immunogenic cell death (ICD) is a newly discovered form of cellular demise that triggers adaptive immune responses mediated by T cells. However, the immunogenic cell death-related lncRNAs (ICDRLs) involved in bladder cancer (BC) development and progression remain to be further elucidated. Molecular profiling data and clinicopathological information for BC patients were obtained from TCGA, and the ICDRGs list was obtained from published literature. For the identification of ICDRLs, Pearson co-expression analysis was performed, and a prognostic signature based on 13 ICDRLs was constructed by univariate assays and LASSO assays. Herein, an ICDRLSig consisting of 13 ICDRLs was constructed. KM curves and ROC curves demonstrated that the constructed signature in the TCGA training, testing, entire and external sets have good predictive performance. Multivariate assays illuminated that the signature is an independent predictor for BC patients’ OS, exhibiting greater predictive power for the survival than traditional clinicopathological features. Additionally, patients in the high-ICDRLSig risk subgroup had more abundant immune infiltration, higher immune checkpoint gene expression, lower TMB and poorer response to immunotherapy. We have developed a novel ICDRLSig that can be exploited for survival prediction and provide a reference for further individualized treatment.
Single-cell RNA-seq reveals the effects of the FecB mutation on the transcriptome profile in ovine cumulus cells
Authors: Guo Xiaofei , Fang Yi , Liang Rong , Wang Xiangyu , Zhang Jinlong , Dong Chunxiao , Wang Biao , Liu Yu , Chu Mingxing , Zhang Xiaoshen , Zhong Rongzhen
Published: June 2024

Genetic variations in the ovine ovulation rate, which are associated with the FecB mutation, provide useful models by which to explore the mechanisms regulating the development of mammalian antral follicles. In order to study the effects of the FecB mutation on cumulus cell differentiation, preovulatory follicles were aspirated and cumulus cells were isolated from three FecB genotypes (homozygous, heterozygous and wild type) of Small Tail Han (STH) sheep superstimulated with FSH. Transcriptome information from tens of thousands of cumulus cells was determined with the 10 × Genomics single-cell RNA-seq technology. Under the superovulation treatment, the observed number of preovulatory follicles in the ovaries of FecB carriers was still significantly higher than that in the wild-type (P < 0.05). The expression patterns of cumulus cells differed between FecB carriers and wild-type ewes. The screened cumulus cells could also be further divided into different cell clusters, and the differentiation states and fates of each group of cumulus cells also remained different, which supports the notion that heterogeneity in gene expression is prevalent in single cells. The oxidative phosphorylation pathway was significantly enriched in differentially expressed genes among the cell differentiation branch nodes of cumulus cells and among the differentially expressed genes of cumulus cells from the three genotypes. Combined with the important role of oxidative phosphorylation in the maturation of COCs, we suggest that the oxidative phosphorylation pathway of cumulus cells plays a crucial role in the differentiation process of cumulus cells and the mutation effect of the FecB gene.
Prediction of land use for the next 30 years using the PLUS model's multi-scenario simulation in Guizhou Province, China
Authors: Liu Juncong , Liu Bangyu , Wu Linjing , Miao Haiying , Liu Jiegang , Jiang Ke , Ding Hu , Gao Weichang , Liu Taoze
Published: June 2024

Land use changes significantly impact the structure and functioning of ecosystems. The current research focus lies in how to utilize economic and policy instruments to regulate conflicts among stakeholders effectively. The objective is to facilitate rational planning and sustainable development of land utilization resources. The PLUS model integrates a rule-based mining method for land expansion analysis and a CA model based on multi-type stochastic seeding mechanism, which can be used to mine the driving factors of land expansion and predict the patch-level evolution of land use landscapes. Using the PLUS model, a simulation was conducted to study the future land use distribution in the research area over the next 30 years. Based on land use data from Guizhou Province in 2000, 2010, and 2020, a total of 16 driving factors were selected from three aspects: geographical environment, transportation network, and socio-economic conditions. Four scenarios, namely natural development, urban development, ecological conservation, and farmland rotection, were established. Comparative analysis of the simulated differences among the various scenarios was performed. (1) The overall accuracy of the land use simulation using the PLUS model in the study area was 0.983, with a Kappa coefficient of 0.972 and a FoM coefficient of 0.509. The research accuracy meets the simulation requirements. (2) Through the simulation of four different scenarios, the study investigated the land use changes in Guizhou Province over the next 30 years. Each scenario exhibited distinct impacts on land utilization. Comprehensive comparison of the different simulation results revealed that the farmland protection scenario aligns with the sustainable development goals of the research area. Currently, there is a relative scarcity of research on land use simulation, particularly in model application, for Guizhou Province. This study aims to provide a reference for the rational planning of land resources and high-quality urban construction in Guizhou, promoting the high-quality economic development in tandem with advanced ecological and environmental protection.
SNX16 is required for hepatocellular carcinoma survival via modulating the EGFR-AKT signaling pathway
Authors: Yuan Lebin , Meng Yanqiu , Xiang Jiajia
Published: June 2024

Sorting nexin 16 (SNX16), a pivotal sorting nexin, emerges in tumor progression complexity, fueling research interest. However, SNX16’s biological impact and molecular underpinnings in hepatocellular carcinoma (HCC) remain elusive. This study probes SNX16’s function, clinical relevance via mRNA, and protein expression in HCC. Overexpression/knockdown assays of SNX16 were employed to elucidate impacts on HCC cell invasion, proliferation, and EMT. Additionally, the study delved into SNX16’s regulation of the EGFR-AKT signaling cascade mechanism. SNX16 overexpression in HCC correlates with poor patient survival; enhancing proliferation, migration, invasion, and tumorigenicity, while SNX16 knockdown suppresses these processes. SNX16 downregulation curbs phospho-EGFR, dampening AKT signaling. EGFR suppression counters SNX16-overexpression-induced HCC proliferation, motility, and invasiveness. Our findings delineate SNX16’s regulatory role in HCC, implicating it as a prospective therapeutic target.
Molecular profiling of pediatric and young adult colorectal cancer reveals a distinct genomic landscapes and potential therapeutic avenues
Authors: Busico A. , Gasparini P. , Rausa E. , Cattaneo L. , Bozzi F. , Silvestri M. , Capone I. , Conca E. , Tamborini E. , Perrone F. , Vitellaro M. , Ricci M.T. , Casanova M. , Chiaravalli S. , Bergamaschi L. , Massimino M. , Milione M. , Sozzi G. , Pruneri G. , Ferrari A. , Signoroni S.
Published: June 2024

Colorectal cancer (CRC) is a global health concern, and the incidence of early onset (EO) CRC, has an upward trend. This study delves into the genomic landscape of EO-CRC, specifically focusing on pediatric (PED) and young adult (YA) patients, comparing them with adult (AD) CRC. In this retrospective monocentric investigation, we performed targeted next-generation sequencing to compare the mutational profile of 38 EO-CRCs patients (eight PED and 30 YA) to those of a ‘control group’ consisting of 56 AD-CRCs. Our findings reveal distinct molecular profiles in EO-CRC, notably in the WNT and PI3K-AKT pathways. In pediatrics, we observed a significantly higher frequency of RNF43 mutations, whereas APC mutations were more prevalent in adult cases. These observations suggest age-related differences in the activation of the WNT pathway. Pathway and copy number variation analysis reveal that AD-CRC and YA-CRC have more similarities than the pediatric patients. PED shows a peculiar profile with CDK6 amplification and the enrichment of lysine degradation pathway. These findings may open doors for personalized therapies, such as PI3K-AKT pathway inhibitors or CDK6 inhibitors for pediatric patients. Additionally, the distinct molecular signatures of EO-CRC underscore the need for age-specific treatment strategies and precision medicine. This study emphasizes the importance of comprehensive molecular investigations in EO-CRCs, which can potentially improve diagnostic accuracy, prognosis, and therapeutic decisions for these patients. Collaboration between the pediatric and adult oncology community is fundamental to improve oncological outcomes for this rare and challenging pediatric tumor.
Sex-specific relationship patterns between body morphology and maturity status with change of direction and agility in elite adolescent volleyball players
Authors: Koźlenia Dawid , Popowczak Marek , Horička Pavol , Šimonek Jaromir , Domaradzki Jarosław
Published: June 2024

This study explored sex-specific patterns in the relationship between maturity, body morphology, and change of direction (COD) and agility (AG) in adolescent volleyball players. The sample comprised 22 males and 24 females aged 15–17 with at least 4 years of sports experience. Measurements included body height, weight, muscle and fat mass, leg length, and center of mass. The study determined the Age of Peak Height Velocity (APHV) and evaluated sensorimotor ability through pre-planned COD and not-planned AG five-time shuttle runs, measuring the time difference as the index of reactivity. Positive correlations were found between COD and AG with fat mass index (FMI) in boys, while negative relative lower limb length (rLL) correlated with COD. In females, age of peak height velocity (APHV) showed a significant negative relationship with sensorimotor ability. Linear and polynomial regressions confirmed predictive and curvilinear relationships, respectively. Cluster analysis identified different associations in boys and girls, emphasizing sex-specific patterns. Body fat percentage had a negative impact on COD-AG in boys, while the optimal lower limb length proportion positively influenced COD due to enhanced maneuverability. Maturation affected sensorimotor abilities in girls. The findings suggest a need for a tailored approach to COD-AG development based on sex-specific considerations in adolescent volleyball players.
Age-related differences in network controllability are mitigated by redundancy in large-scale brain networks
Authors: Stanford William , Mucha Peter J. , Dayan Eran
Published: June 2024

The aging brain undergoes major changes in its topology. The mechanisms by which the brain mitigates age-associated changes in topology to maintain robust control of brain networks are unknown. Here we use diffusion MRI data from cognitively intact participants (n = 480, ages 40–90) to study age-associated differences in the average controllability of structural brain networks, topological features that could mitigate these differences, and the overall effect on cognitive function. We find age-associated declines in average controllability in control hubs and large-scale networks, particularly within the frontoparietal control and default mode networks. Further, we find that redundancy, a hypothesized mechanism of reserve, quantified via the assessment of multi-step paths within networks, mitigates the effects of topological differences on average network controllability. Lastly, we discover that average network controllability, redundancy, and grey matter volume, each uniquely contribute to predictive models of cognitive function. In sum, our results highlight the importance of redundancy for robust control of brain networks and in cognitive function in healthy-aging.
Semantic associative abilities and executive control functions predict novelty and appropriateness of idea generation
Authors: Wang Xueyang , Chen Qunlin , Zhuang Kaixiang , Zhang Jingyi , Cortes Robert A. , Holzman Daniel D. , Fan Li , Liu Cheng , Sun Jiangzhou , Li Xianrui , Li Yu , Feng Qiuyang , Chen Hong , Feng Tingyong , Lei Xu , He Qinghua , Green Adam E. , Qiu Jiang
Published: June 2024

Novelty and appropriateness are two fundamental components of creativity. However, the way in which novelty and appropriateness are separated at behavioral and neural levels remains poorly understood. In the present study, we aim to distinguish behavioral and neural bases of novelty and appropriateness of creative idea generation. In alignment with two established theories of creative thinking, which respectively, emphasize semantic association and executive control, behavioral results indicate that novelty relies more on associative abilities, while appropriateness relies more on executive functions. Next, employing a connectome predictive modeling (CPM) approach in resting-state fMRI data, we define two functional network-based models—dominated by interactions within the default network and by interactions within the limbic network—that respectively, predict novelty and appropriateness (i.e., cross-brain prediction). Furthermore, the generalizability and specificity of the two functional connectivity patterns are verified in additional resting-state fMRI and task fMRI. Finally, the two functional connectivity patterns, respectively mediate the relationship between semantic association/executive control and novelty/appropriateness. These findings provide global and predictive distinctions between novelty and appropriateness in creative idea generation.
Seafood independence is within reach: a multi-scale assessment of seafood self-reliance in the United States
Authors: Oyikeke Tolulope Samuel , Advani Sahir , Stoll Joshua Scott
Published: June 2024

As a vital source of nutrition, cultural identity, and economic activity, seafood has become one of the most globally traded commodities worldwide. However, increased concerns about food security, coupled with the disruptive effects of climate change, contagious diseases, and geopolitical conflict, are bringing acute attention to the need for food system transformation at multiple scales. Here, we investigate the United States’ potential to achieve seafood “independence” and maximize health benefits to the nation by integrating production, utilization, yield, and consumption data across seven regions of the United States and nationally over 50 years (1970–2021). Although the United States is the second largest importer of seafood worldwide, findings from this study show that self-reliance at the national level is achievable, though the ability of different subregions to meet demand is variable. Achieving greater seafood independence would require shifts in consumer behavior, investments in infrastructure, and continual adaptation in the face of climate change.
Development and validation of the puppy blues scale measuring temporary affective disturbance resembling baby blues
Authors: Ståhl Aada , Salonen Milla , Hakanen Emma , Mikkola Salla , Sulkama Sini , Lahti Jari , Lohi Hannes
Published: June 2024

It has been described that many puppy owners experience a state called puppy blues involving stress, worry, anxiety, strain, frustration, or regret. While puppy blues is a commonly used term among dog owners, the term is nearly nonexistent in scientific literature. In turn, analogous phenomenon, postpartum affective disturbance of infant caregivers, is well described in the literature. This study aimed to develop and validate the first questionnaire to evaluate puppy blues. The methodology involved generating scale items based on a qualitative review of 135 pilot survey responses from people who had experienced distress during the puppy period, conducting exploratory factor analysis for the final scale items from a dataset of 1801 answers from Finnish dog owners (92% women), and collecting test-retest data from 265 individuals to assess the consistency of the measurement of items and factor structure across time. In addition, we collected an independent sample of 326 owners of 1–2-year-old dogs who answered the survey both regarding puppy period and current moment. The results indicate that the scale is a valid and reliable tool for measuring dog owners’ negative experiences and feelings related to puppyhood. We discovered three factors that describe different aspects of puppy blues: Frustration, Anxiety, and Weariness, which accounted for a significant proportion of the variance in puppy blues. The study demonstrated good internal consistency and consistency across two independent samples for the three identified factors. The test-retest reliability of the factors was good. Responses for the current timeframe compared to puppyhood experiences revealed significantly lower current scores across all factors for the current period, validating that the scale captures distress during puppyhood that diminishes over time. Interestingly, we found a fading affect bias where recollections of the experiences in the puppy period became more positive with time. Our findings shed light on the characteristics of puppy blues and provide a useful retrospective tool for measuring it.
Epidemic forecast follies
Authors: Krapivsky P. L. , Redner S.
Published: June 2024

We introduce a simple multiplicative model to describe the temporal behavior and the ultimate outcome of an epidemic. Our model accounts, in a minimalist way, for the competing influences of imposing public-health restrictions when the epidemic is severe, and relaxing restrictions when the epidemic is waning. Our primary results are that different instances of an epidemic with identical starting points have disparate outcomes and each epidemic temporal history is strongly fluctuating.
Changes in semantic memory structure support successful problem-solving and analogical transfer
Authors: Bieth Théophile , Kenett Yoed N. , Ovando-Tellez Marcela , Lopez-Persem Alizée , Lacaux Célia , Scuccimarra Marie , Maye Inès , Sénéchal Jade , Oudiette Delphine , Volle Emmanuelle
Published: June 2024

Creative problem-solving is central in daily life, yet its underlying mechanisms remain elusive. Restructuring (i.e., reorganization of problem-related representations) is considered one problem-solving mechanism and may lead to an abstract problem-related representation facilitating the solving of analogous problems. Here, we used network science methodology to estimate participants’ semantic memory networks (SemNets) before and after attempting to solve a riddle. Restructuring was quantified as the difference in SemNets metrics between pre- and post-solving phases. Our results provide initial evidence that problem-related SemNets restructuring may be associated with the successful solving of the riddle and, subsequently, an analogous one. Solution-relevant concepts and semantically remote concepts became more strongly related in solvers. Only changes in semantically remote concepts were instrumental in actively solving the riddle while changes in solution-relevant concepts may reflect a pre-exposure to the solution.
Nisin-relevant antimicrobial peptides: synthesis strategies and applications
Authors: Yuan Lin , Wu Shengbo , Tian Kairen , Wang Shengli , Wu Hao , Qiao Jianjun
Published: June 2024

Nisin have been successfully utilized as preservatives in the food industry and have evolved into a paradigm for understanding the genetic structure, expression, and control of genes created by lantibiotics.
Optimization of a modified Captiva EMR-lipid method based on micro-matrix solid-phase dispersion coupled with gas chromatography-mass spectrometry for the determination of nine bisphenols in mussel samples
Authors: Carro N. , Fernández R. , Cobas J. , García I. , Ignacio M. , Mouteira A.
Published: June 2024

This work describes a reliable, cheap, easy and fast method for analysis of nine bisphenols in mussel samples by gas chromatography-mass spectrometry after trimethylsilylation.
Enhanced photocatalytic performance of tetraphenylethylene-based porous aromatic frameworks by bandgap adjustment for the synthesis of benzimidazoles
Authors: Wang He , Xu Xinmeng , Cao Linzhu , Zhang Zhenwei , Li Jiali , Liu Xiaoming , Tao Xin , Zhu Guangshan
Published: June 2024

Three donor (D)–acceptor (A) type tetraphenylethylene-based porous aromatic frameworks (TPE-PAFs) are constructed, which exhibit excellent photocatalytic performance for benzimidazole synthesis under mild reaction conditions.
Comparison of the hepatoprotection of intragastric and intravenous cyanidin-3-glucoside administration: focus on the key metabolites and gut microbiota modulation
Authors: Wang Bulei , Tang Xin , Mao Bingyong , Zhang Qiuxiang , Tian Fengwei , Zhao Jianxin , Chen Wei , Cui Shumao
Published: June 2024

C3G administration ameliorated CCl4-induced liver injury by gut microbiota modulation and microbial-derived catabolite production.
Structurally realistic carbide-derived carbon model in annealing molecular dynamics methodology with analytic bond-order potential
Authors: Sarkar Koushik , Talukder Muhammad Anisuzzaman
Published: June 2024

A realistic carbide-derived carbon (CDC) model is produced with ABOP at a low computational cost. The simulated CDC agrees well with experiments over a broad temperature range, facilitating the production of atomistic models of experimental samples.
Unveiling the potential of a BCN-biphenylene monolayer as a high-performance anode material for alkali metal ion batteries: a first-principles study
Authors: Kumar Ajay , Parida Prakash
Published: June 2024

Schematic diagram of a battery using bpn-BCN monolayer as an anode material. The bpn-BCN monolayer exhibits high specific storage capacities for alkali metals, with values of 1057.33 mA h g−1 for Li, 647.27 mA h g−1 for Na, and 465.98 mA h g−1 for K.
Engineering linkers to regulate solid-state emission of spirodifluorene-based conjugated porous polymers for white light-emitting devices
Authors: Hu Yinan , Shi Mingkai , Meng Shulin , Zhao Haocheng , Wang Junfeng , Wu Yuling , Li Jie , Miao Yanqin , Wang Hua
Published: June 2024

Luminescent films based on conjugated porous polymers CPP-1 (PLQY=83%) and CPP-2 (PLQY=61%) were prepared for solid-state lighting, resulting in warm white light with CIE coordinates of (0.33, 0.44) when the ratio of CPP-2 to CPP-1 was 1 : 4.
An aryl-to-alkyl radical relay arylation reaction of a remote C(sp3)–H bond using 1,4-dicyanobenzene as an electrochemical redox-mediator
Authors: Yu Weijie , Zhang Hongjie , Shen Zhipeng , Yang Lingyun , Luo Jin , Li Wendong , Zhao Kuang , Li Xiaolong , Xu Jiale , Zhou Yuan , Wang Tao
Published: June 2024

In this paper, we developed an electro-reductive aryl-to-alkyl radical relay arylation reaction of a remote C(sp3)–H bond via a 1,5-HAT process. This protocol features mild conditions, simple operation, and a broad substrate scope.
Photoredox-catalyzed hydrogenation of alkenes assisted by an in situ generated PPh3(OH) radical and acetic acid
Authors: Xie Zhen-Zhen , Zheng Yu , Liao Zi-Hao , Yuan Chu-Ping , Li Ming-Zhi , Deng Ke-Yi , Xiang Hao-Yue , Chen Kai , Yang Hua
Published: June 2024

Herein, a practical, mild and convenient strategy was disclosed for the hydrogenation of alkenes under photocatalytic conditions through a HAT/protonation process.
Preparation of nanocellulose and application of nanocellulose polyurethane composites
Authors: Mo Ya , Huang Xiaoyue , Yue Meng , Hu Lixin , Hu Chuanqun
Published: June 2024

Types of nanocellulose and their application areas with polyurethane composites.
Green advancements towards the electrochemical synthesis of heterocycles
Authors: Hashmi Sonia Zeba , Bareth Diksha , Dwivedi Jaya , Kishore Dharma , Alvi P. A.
Published: June 2024

Heterocyclic chemistry is a large field with diverse applications in the areas of biological research and pharmaceutical advancement.
A chemical coating strategy for assembling a boron-doped diamond anode towards electrocatalytic degradation of late landfill leachate
Authors: Zeng Juanmei , Liu Xi , Chen Qizhi , Hu Dongying
Published: June 2024

A chemical coating strategy for assembling boron-doped diamond anode towards electrocatalytic degradation of late landfill leachate with high removal rates of organic carbon (TOC) and ammonia nitrogen after electrochemical oxidation.
Reply to the ‘Comment on “What resources do high school students activate to link energetic and structural changes in chemical reactions? – A qualitative study”’ by K. S. Taber, Chem. Educ. Res. Pract., 2024, 25, https://doi.org/10.1039/D3RP00232B
Authors: Pölloth Benjamin , Diekemper Dominik , Bosch Chiara , Schwarzer Stefan
Published: June 2024

Our article “What resources do high school students activate to link energetic and structural changes in chemical reactions? – A qualitative study” was recently commented on by Keith Taber. In his comment he focuses on the dominant role of the octet rule in students' reasoning and suggests that students rely on an octet framework. In the first part of this response, Taber's argument about the pervasive inappropriate use of the octet rule is supported by empirical evidence. Re-analysis of the data confirms that students often seem to assume initial atomicity, use anthropomorphic language, and closely associate the octet rule with stability. These points make the octet rule a convenient answer for students to fill the “explanatory vacuum” often left in chemistry education, e.g. for explaining the driving force of reactions. In the second part, we discuss how these observations might be rationalized. Rather than a static misconception perspective, we suggest that student's application of the octet rule can be viewed from a dynamic, resource-oriented view of learning. Three examples are introduced to illustrate the variety in students’ applications of the octet rule. For a better understanding, more detailed research on how students really think and learn about the octet rule and energetics is necessary.
The unprecedented strong paratropic ring current of a bis-PdII complex of 5,10,23-trimesityl [28]heptaphyrin(1.1.0.0.1.0.0)
Authors: Liu Yang , Xu Ling , Jin Xiaorong , Yin Bangshao , Rao Yutao , Zhou Mingbo , Song Jianxin , Osuka Atsuhiro
Published: June 2024

Heptaphyrin(1.1.0.0.1.0.0) and its derivatives were synthesized for the first time. The bis-Pd complex exhibits an unprecedented strong paratropic ring current, showing signals due to outer β-protons in the range of −1.06 ∼ −1.90 ppm.
Multiphase artificial interphase layer enabled long-life and dendrite-free sodium metal batteries
Authors: Xia Li , Li Kuangji , Zhang Yinggan , Wu Hualong , Fang Ziyi , Yan Xiaolin , Sa Baisheng , Wang Laisen , Lin Liang , Lin Jie , Wei Guoying , Peng Dong-Liang , Xie Qingshui
Published: June 2024

A multiphase artificial interphase layer can induce homogeneous deposition of Na+ and promote rapid transport of Na+. Therefore, the BiCl3-Na anode achieves uniform dendrite-free deposition and improves electrochemical performance.
Defect engineering and morphology adjustment assist NH4V4O10 to be a high-performance aqueous zinc ion battery cathode
Authors: Yao Song , Sun Yangang
Published: June 2024

The ultrathin size of SNVO with oxygen vacancies and more active sites improved the diffusion ability of Zn2+ ions. SNVO exhibits excellent cycle stability, retaining 94.6% of its capacity after 1000 cycles at 10 A g−1.
Studying the small extracellular vesicle capture efficiency of magnetic beads coated with tannic acid
Authors: Grishaev Nikita A. , Moiseeva Ekaterina O. , Chernyshev Vasiliy S. , Komlev Aleksei S. , Novoselov Anton M. , Yashchenok Alexey M.
Published: June 2024

Tannin acid-coated magnetic beads provide a functional platform for capturing small extracellular vesicles from cell culture media with high efficiency.
When porphyrins meet 2D materials: spectroscopic and photocatalytic properties
Authors: Lindner Aleksandra , Lesniewicz Aleksandra , Kolman Aleksander , Larowska-Zarych Daria , Marciniak Bronislaw , Lewandowska-Andralojc Anna
Published: June 2024

Exploring the fundamental understanding of the structure–property–performance relationship of porphyrins functionalized with 2D materials.
Polypyrrole/NiFe-layered double hydroxide composite as an anticorrosive microwave absorber
Authors: Zhai Haoxiang , Wu Lihong , Yu Lei , Li Liang , Wan Gengping , Zhang Ying , Yuan Xiang , Wang Jieping , Wang Guizhen
Published: June 2024

Polypyrrole/NiFe-layered double hydroxide composite with excellent microwave absorption capability and anti-corrosion performance that can be used in marine environments.
On the effect of gas generation on heat transfer during thermal runaway of pouch cells
Authors: Weber Niklas , Schuhmann Sebastian , Löwe Robert , Tübke Jens , Nirschl Hermann
Published: June 2024

The importance of accounting for gas generation when modelling battery thermal runaway is investigated.
A scheduling framework for a multi‐agent active distribution network in presence of renewable energy sources
Authors: Hasan Husam , Karimi Shahram , Moradi Mohamad
Published: June 2024

In a multi‐agent active distribution network, each agent schedules its electrical network independently to increase its profit. The high penetration level of renewable energy sources such as wind and solar power, may disturb the electrical balance of supply and demand and cause overvoltage in the grid. This study presents a decentralized scheduling approach for managing energy and reactive power transactions between the agents considering their independence and privacy. Using the proposed framework, the agents can increase their profit by exchanging active and reactive power with their neighbours, while all the technical constraints such as the allowed voltage limit of the buses are satisfied. To prove the effectiveness of the suggested technique, a multi‐agent active distribution network including 11 independent agents is simulated with a high penetration of renewable energy. The simulation results illustrate the efficiency of the suggested approach from two technical and economic points of view.
Optimized dehazing algorithm based on dark channel prior with Gabor filter and multiscale minimum filter
Authors: Fu Feiran , Zhang Zelong , Geng Xuena , Xu Jing , Fang Ming
Published: June 2024

Traditional dehazing algorithms have long been limited in their ability to remove fog effectively, especially in preserving details. This study proposes an improved dark channel prior dehazing algorithm designed to overcome the limitations of traditional algorithms by refining the transmission map and estimating atmospheric light intensity. The algorithm fully exploits the anti‐haze characteristics of the Gabor filter to extract multi‐directional texture features. By fusing these features to form a guidance map for guided filtering, it effectively reduces the blurring caused by guided filtering on the image edges, thereby producing a more accurate transmission map. Simultaneously, an enhanced atmospheric light successfully reduces interference from white objects in the image. The experiment phase utilized the publicly available RESIDE dataset for validation. The algorithm achieved a Peak Signal‐to‐Noise Ratio (PSNR) of 22.4 and a Structural Similarity Index (SSIM) of 0.88. These metrics indicate the algorithm's superior dehazing capabilities.
Epoxy and polyvinylchloride materials with fillers derived from rice waste
Authors: Gotlib Elena , Sokolova Alla , Zenitova Lyubov , Galimov Engel , Valeeva Alina
Published: June 2024

The article is dedicated to the study of silicate fillers on the base of rice production waste and their perspective application in epoxy and polyvinylchloride composite materials. The authors evaluate the impact of phase and granulometric composition, porosity of fillers, the temperature of their obtaining on modifying effect. The comparative analysis of obtained fillers with industrial Aerosil and fully amorphous silicon dioxide is implemented. The effectiveness of application of rice husk ash burnt at 500°C is proven from technical, economic and environmental aspects.
Physical and Mechanical Properties of Lime Coatings with the Additive of Polysaccharides
Authors: Loganina Valentina , Pylaev Vadim
Published: June 2024

Information is provided on the use of synthetic polysaccharides in lime coatings intended for the restoration of historical buildings and finishing of newly constructed objects. It has been shown that lime compositions with the addition of polysaccharides are characterized by higher cohesive strength due to the high content of calcite and the formation of inter- and intracrystalline organic macromolecules. It has been established that the introduction of the Atren Cem LV additive contributes to a sharp increase in plastic strength compared to the control composition by 1.5 times at the time of mixing and by 2.6 times after 8 hours of hardening. The introduction of Sunbo PC 1021 plasticizer into the lime mixture helps reduce plastic strength. However, after 7 hours from the moment of mixing, an increase in plastic strength is observed, outstripping the increase in plastic strength of the control composition.
Stress-Strain State of Air-Field Slab made of Basalt Fiber Reinforced Concrete
Authors: Kharun Makhmud , Baichorova Aminat A. , Nozdrin Dmitry S.
Published: June 2024

This study examines the impact of aircraft landing gear on the airfield slabs at the time of landing and the resulting reaction in the runway pavement material, depending on the type of concrete used. Two materials were compared: classical concrete and special concrete with the addition of basalt fiber. As a practical object of the study, an airfield slab was chosen. The calculation was performed in the Ansys software package, using the WorkBench graphical interface. The fiber concrete structure was modeled by the built-in means of the Material Design module in Ansys WorkBench; a linear-elastic concrete model was used as the material matrix. The research showed that basalt fiber reinforced concrete products have higher strength characteristics. They have better compressive, flexural tensile strength, tolerate more elastic deformations, and can handle higher loads.
Survivability of reinforced concrete frame systems with complex stressed elements
Authors: Fedorova Natalia , Moskovtseva Violetta
Published: June 2024

On the energy basis, using the diagrammatic method, the solution of the problem of determining the survivability parameter of the reinforced concrete frame structure of a multistory building with complex-stressed elements under static-dynamic deformation caused by a special impact is obtained. Determination of the parametric load value, at which in the most stressed spatial section at the considered loading mode one of the criteria of the special limit state comes from the system of canonical equations of the extraordinary version of the mixed method. Criterion check of survivability of the considered physical and structurally nonlinear frame system is performed using diagrams "parametric load - generalized reference reaction" for the spatial section of the complex stressed reinforced concrete element. Comparison of the experimental and design survivability parameters gives an assessment of the efficiency and reliability of the proposed design dependencies. It has been shown that with the adopted initial hypotheses, the proposed method for calculating the survivability of frames with complex stressed elements satisfactorily describes the process of their deformation and destruction under the considered impacts.
Transverse bending strength of reinforced concrete beams with single reinforcement
Authors: Prokopovich Anatoly , Buzovskaya Yana , Mayorov Alexey
Published: June 2024

The objective of the research considered in this article is to find out the role of longitudinal reinforcement and conditions of its bonding with concrete in ensuring strength and forming a physical phenomenon of work and failure of reinforced concrete beams of rectangular cross-section in transverse bending zones. It gives the test results for three pairs (series) of experimental specimens made as reinforced concrete beams of rectangular cross-section with the same strength of concrete, which are reinforced only by longitudinal reinforcement represented by two A500 rods. Experimental specimens were tested as free supporting beams loaded in the span by two similar concentrated forces. Each pair of experimental specimens had the same longitudinal reinforcement and various conditions of bonding between reinforcement with concrete along their length. For one of the specimens in the pair, bonding was fully ensured along the entire length, while for the other one it was fully disrupted in transverse bending zones. Reinforcement rod diameters for each pair were different. The results show the role of longitudinal reinforcement and conditions of its bonding with concrete in ensuring strength, forming the stress-strain state and nature of failure of reinforced beams of rectangular cross-section in transverse bending zones.
Calculation and forecasting of operational durability of reinforced concrete structures
Authors: Vanus Dahi Suleman , Zharikhin Anton Aleksandrovich
Published: June 2024

Based on analytical and experimental data, the durability properties of reinforced concrete and reinforcement necessary for modeling degradation and calculating the durability of reinforced concrete elements under various types of corrosion damage are substantiated.

A probabilistic model has been developed for predicting and assessing the durability and reliability of reinforced concrete elements, taking into account the statistical variability of design parameters and the kinetics of degradation processes during long periods of operation. An analysis of the method for calculating and predicting the durability of reinforced concrete elements based on deterministic probabilistic models of degradation of structural elements operating under aggressive environmental influences has been carried out.

The necessary assessment of the stress-strain state of reinforced concrete structures under conditions of long-term operation in aggressive environments as a result of corrosion damage is given, and their residual life is studied, taking into account the reduction in the cross-sectional area of concrete and reinforcement
Investigation of monolithic frame with initial punching damage under accidental impacts
Authors: Alekseytsev Anatoly Viktorovich , Antonov Mikhail Dmitrievich
Published: June 2024

According to regulations and standards, all buildings and structures must fulfil the requirements for mechanical safety. At the same time, the safety of structures must be ensured throughout their entire service life. The annual increase in the number of accidents due to terrorist acts, domestic gas explosions, collisions of vehicles with load-bearing structures, etc. has led to the creation of normative documents on the protection of buildings from progressive collapse. At the same time, the issue of buildings sustainability, which were designed without taking into account these requirements and which may have suffered localized damage during operation, remains open. Such buildings include monolithic houses with flat slabs, which have been erected since the beginning of the XXI century. The aim of the work is to study the resistance of these frames to accidental impacts and the influence on the survivability of structures of local defects in the most critical zone of the column-slab junction. Calculations on stability assessment in case of emergency of a fragment of a 9-storey monolithic building have been performed and it has been established that at certain combinations of damages in the support zones, progressive destruction of neighboring structures may occur.
Stress-strain state 4-way end-plate beams to column connection
Authors: Konin Denis V. , Olurombi Aleksander R. , Tuvaev Nikita A.
Published: June 2024

With the development of construction technology of multistory buildings with a steel frame, the use of 4-way rigid joints for beams to column connection becomes especially relevant, as it allows to eliminate the need for arrangement of braced in the frame of a building. Residential building requires compact size of construction joint assemblies and no additional issues during finishing and decorating works. The article describes lightweight end plate joints of 4-way beams to column connection as one of the most compact, economical and easy to assembly type of connection. The article analyzes numerical models of such assemblies created in the ANSYS Mechanical software package. The variants of assemblies with 20- and 30-mm thick end plates are considered, the stress state of the column wall in 2-way and 4-way connection is compared, and the influence of end plate thickness on the stress state of bolts in such assemblies is evaluated. The result of the analysis brings us to the conclusion that experimental research is needed to create an analytical procedure for calculating of such joints.
Stress-strain State of RC Beams Strengthened with CFRP at different Levels of Loading
Authors: Smolyago Gennady A. , Obernikhina Yana L.
Published: June 2024

Strengthening of RC structures strengthened by externally bonded CFRP is quite popular all over the world, being in many situations an alternative to traditional methods. However, in most studies, bending elements strengthened by CFRP are considered without loading that have previously arisen in the process of exploitation, which is not entirely correct. At the same time, there are a limited number of systematic studies of the effect of preload on the bearing capacity of RC beams strengthened with CFRP. This article presents a method for assessing the effect of the magnitude of curvature during strengthening on the bearing capacity and other parameters of the sections of bent RC elements strengthened by externally bonded CFRP. On the basis of the proposed technique, numerical studies of the stress-strain state of sections of RC bending elements, strengthened at different levels of initial curvature of an unreinforced section, taking into account different coefficients of reinforcement with steel reinforcement, were performed. After analyzing the obtained data, we can conclude that the level of curvature of the section during strengthening has a significant effect on the deformability and strength of RC beams and the need to take this factor into account when calculating bending RC.