bluuebunny/crossref_metadata_2025_split huggingface dataset:
Optically Controlled Recovery and Recycling of Homogeneous Organocatalysts Enabled by Photoswitches
Authors: Qiu Qianfeng , Sun Zhenhuan , Joubran Danielle , Li Xiang , Wan Joshua , Schmidt‐Rohr Klaus , Han Grace G. D. 
Published: January 2023

AbstractWe address a critical challenge of recovering and recycling homogeneous organocatalysts by designing photoswitchable catalyst structures that display a reversible solubility change in response to light. Initially insoluble catalysts are UV‐switched to a soluble isomeric state, which catalyzes the reaction, then back‐isomerizes to the insoluble state upon completion of the reaction to be filtered and recycled. The molecular design principles that allow for the drastic solubility change over 10 times between the isomeric states, 87 % recovery by the light‐induced precipitation, and multiple rounds of catalyst recycling are revealed. This proof of concept will open up opportunities to develop highly recyclable homogeneous catalysts that are important for the synthesis of critical compounds in various industries, which is anticipated to significantly reduce environmental impact and costs.
Galvanic Redox Potentiometry for Fouling‐Free and Stable Serotonin Sensing in a Living Animal Brain
Authors: Zhu Fenghui , Xue Yifei , Ji Wenliang , Li Xin , Ma Wenjie , Yu Ping , Jiang Ying , Mao Lanqun 
Published: January 2023

AbstractSerotonin (5‐HT) is a major neurotransmitter broadly involved in many aspects of feeling and behavior. Although its electro‐activity makes it a promising candidate for electrochemical sensing, the persistent generation of fouling layers on the electrode by its oxidation products presents a hurdle for reliable sensing. Here, we present a fouling‐free 5‐HT sensor based on galvanic redox potentiometry. The sensor efficiently minimizes electrode fouling as revealed by in situ Raman spectroscopy, ensuring a less than 3 % signal change in a 2 hour continuous experiment, whereas amperometric sensors losing 90 % within 30 min. Most importantly, the sensor is highly amenable for in vivo studies, permitting real‐time 5‐HT monitoring, and supporting the mechanism associated with serotonin release in brain. Our system offers an effective way for sensing different neurochemicals having significant fouling issues, thus facilitating the molecular‐level understanding of brain function.
Characterization and model‐based mechanical analysis of moisture gradients in PA 6
Authors: Sambale Anna Katharina , Stanko Michael , Uhlig Kai , Stommel Markus 
Published: January 2023

AbstractIn this contribution, a numerical calculation environment for the determination of the moisture absorption of polyamide 6 (PA 6) is developed. The focus in this context is on modeling and evaluating the influence of locally varying water concentrations and existing moisture gradients on the mechanical properties of the material. Defined moisture distributions are set by specific conditioning processes and compared to the results of an FE calculation environment. The developed numerical method combines a mass diffusion with a subsequent structural‐mechanical simulation. The first includes a transient analysis of moisture absorption and the resulting swelling processes and residual stresses. The water concentration and residual stress distributions determined within this calculation are implemented as initial conditions in the structural mechanics FE analysis. The experimental setup of the three‐point bending test is considered in this case. The evaluation of the moisture‐induced influence on the mechanical behavior of the considered PA 6 is performed using a linear elastic modeling approach. The validation and evaluation of the calculation quality is carried out for the sorption and swelling calculation as well as for the FE model by means of experimental test data. The calculation methodology presented in this work provides a novel and even more accurate approach for the design of plastic components which are exposed to the influence of environmental humidity or direct water contact in their application.
Processability‐enhanced aromatic thermotropic liquid crystalline copolyesters via the introduction of the unsymmetrical units
Authors: Pan Ziyi , Gao Shuxi , Zhao Yifang , Liao Bing , Cui Yihua , Guo Jianwei , Pang Hao 
Published: January 2023

AbstractA series of ternary thermotropic liquid crystalline copolyesters was synthesized through a simple one‐pot melt condensation based on 4‐hydroxybenzoic acid (HBA), 6‐hydroxy‐2‐naphthoic acid (HNA) and 4‐hydroxy‐2‐naphthoic acid (4‐HNA). The structures were modified via the introduction of the asymmetric 4‐HNA unit. High glass transition temperature values (>80°C) and relatively low melting temperature values (<265°C) were achieved with 4‐HNA molar fraction of over 0.5%, and the copolymer exhibited 5% degradation temperatures of 442–453°C and the char yields of 35.80%–36.74% at 800°C. This indicated that the introduction of asymmetric 4‐HNA blocks into the backbone provides a “torsion axis” to regulate the dense stacking between different main‐chains, which was crucial for the mobility of polyester during thermal processes. Moreover, crystallinity decreased with the increase of 4‐HNA content. The incorporation of 4‐HNA also endowed the obtained copolyester fiber with a skin‐core structure and microfiber morphology. Due to the excellent temperature resistance and fibrous morphology of P‐HBA/HNA/4‐HNA. This work provided a novel strategy to synthesize aromatic thermotropic liquid crystalline copolyesters, which can be promising candidates for processing additives or reinforcing materials with improved processing properties, and potential application in processing, personal protection, and other extreme temperature environments.
Removal of chromium from tannery wastewater by rice husk ash nanosilica
Authors: S Kandasamy , S Meenachi , K Ohm Prakash , Kr Siraj Kumar , V Thamaraikannan 
Published: January 2023

AbstractA study on the removal of hexavalent chromium by adsorption of rice husk nanosilica was attempted. The usage of chromium causes immense pollution as it is used in the leather industry, metal finishing, electroplating, and chromate preparations. To understand the adsorption capacity and its behavior, as well as the adsorption potential of rice husk nanosilica, the effluent used in this experiment is tannery wastewater. The experiment was conducted in tannery industrial wastewater using nanosilica extracted from rice husks ash for various pH, contact time, and adsorbent dosages. The result shows 88.3% chromium removal using rice husk ash nanosilica (RHANS) at pH 4, 1.75 mg adsorbent dosage, and 50 min of contact time. Removal of chromium by this method was a more economical and alternative process. RHANS was selected due to its source availability and antimicrobial properties.
Development of fruit beverages with coconut water: Physicochemical characterization, antioxidant potential, and sensory properties
Authors: Aniceto Adriana , Lemos Isabela da Mota Leal , Jacintho Maria Eduarda de Souza , Cadena Rafael da Silva , Teodoro Anderson J. 
Published: January 2023

AbstractFruit beverages blends have been consumed for the balance between nutrients and flavor. The coconut water to replace water is a more natural solution and an option for blending in the fruit beverages. The present study aimed to develop fruit beverages using coconut water as a base, guava, watermelon, and was added apple juice as natural sweetener. Experimental design was used for the development of beverages, considering a factorial design 22, followed by the physicochemical and sensory analysis. The guava fruit was highlighted on antioxidant capacity results compared with the watermelon fruit, in the 2,2‐diphenyl‐1‐picrylhydrazyl (86.0 ± 2.5 and 11.7 ± 4.5% of reduction, respectively) and in the 2,2′‐azino‐bis(3‐ethylbenzothiazoline‐6‐sulfonic acid) (31.7 ± 0.0 μmol trolox/g 12.8 ± 1.6 μmol trolox/g, respectively). The physicochemical results of the blends revealed that the beverages with guava (0.5 ± 0.0%) are more acidic than those with watermelon (0.2 ± 0.0%), indicating the impact of the intrinsic characteristics of each fruit in the final composition. According to the results of the sensory analysis and response surface methodology, verified the potential optimized formulas contain in their composition 40 g of fruit, 30 g of coconut water, and 30 g of apple juice per 100 mL of beverage, this composition affected the sensory acceptance of the beverages. Our findings indicated the fruit beverages with coconut water have functional attributes, sensory acceptance and can be used as one more option for beverages category.
Effect of prenatal diaphragmatic hernia on pulmonary arterial morphology
Authors: Stainsby Andrew V. , DeKoninck Philip L. J. , Crossley Kelly J. , Thiel Alison , Wallace Megan J. , Pearson James T. , Kashyap Aidan J. , Croughan Michelle K. , Allison Beth A. , Hodges Ryan , Thio Marta , Flemmer Andreas W. , McGillick Erin V. , te Pas Arjan B. , Hooper Stuart B. , Kitchen Marcus J. 
Published: January 2023

AbstractCongenital diaphragmatic hernia (CDH) is a major cause of severe lung hypoplasia and pulmonary hypertension in the newborn. While the pulmonary hypertension is thought to result from abnormal vascular development and arterial vasoreactivity, the anatomical changes in vascular development are unclear. We have examined the 3D structure of the pulmonary arterial tree in rabbits with a surgically induced diaphragmatic hernia (DH). Fetal rabbits (n = 6) had a left‐sided DH created at gestational day 23 (GD23), delivered at GD30, and briefly ventilated; sham‐operated litter mates (n = 5) acted as controls. At postmortem the pulmonary arteries were filled with a radio‐opaque resin before the lungs were scanned using computed tomography (CT). The 3D reconstructed images were analyzed based on vascular branching hierarchy using the software Avizo 2020.2. DH significantly reduced median number of arteries (2,579 (8440) versus 576 (442), p = .017), artery numbers per arterial generation, mean total arterial volume (43.5 ± 8.4 vs. 19.9 ± 3.1 μl, p = .020) and mean total arterial cross‐sectional area (82.5 ± 2.3 vs. 28.2 ± 6.2 mm2, p =.036). Mean arterial radius was increased in DH kittens between the eighth and sixth branching generation and mean arterial length between the sixth and 28th branching generation. A DH in kittens resulted in threefold reduction in pulmonary arterial cross‐sectional area, primarily due to reduced arterial branching. Thus, the reduction in arterial cross‐sectional area could be a major contributor to pulmonary hypertension infants with CDH.
Statistical Modeling of Lead Service Line Locations Using Open‐Source Data
Authors: Feider‐Blazer Estelle , Chen Thomas Ying‐Jeh , Yazdekhasti Sepideh , Daly Craig Michael 
Published: January 2023

Key TakeawaysLead service lines in drinking water systems pose a serious public health threat, but many utilities lack complete records of their locations.Statistical models trained from freely available public data sources have the potential to provide an efficient way to prioritize service line inspection plans.Factors such as choice of machine learning algorithm and spatial distribution of parcel records must be considered to ensure precision when developing a predictive model.
Auxotrophs compromise cell growth and fatty acid production in Saccharomyces cerevisiae
Authors: Yan Chunxiao , Gao Ning , Cao Xuan , Yao Lun , Zhou Yongjin J. , Gao Jiaoqi 
Published: January 2023

AbstractAuxotrophic marker genes have been widely used for genetic engineering in yeast. However, the effects of amino acids or nucleotides deficiency in auxotrophic strains on cell growth and product synthesis were rarely reported. In this study, a total of eight auxotrophic strains of Saccharomyces cerevisiae with single knockout of selection markers were obtained. Cell growth and free fatty acid (FFA) production of these auxotrophic strains were evaluated with supplementation of different concentrations of amino acids or nucleotides. Generally, except ade2Δ mutants, most auxotrophic strains showed decreased cell growth and FFA production, which could be recovered by adding higher concentrations of supplements. LEU2 deletion (leu2Δ) damaged both cell growth and FFA production even with supplementation of 1000 mg L−1 leucine. This study shows that growth and product biosynthesis of auxotrophs could be limited by insufficient supplementation of amino acids or nucleotides, and provides guidance on supplementation of these nutrients during fermentation to maximize cell growth and product biosynthesis.
Combination of chemical profiling and network pharmacology analysis to investigate the potential mechanism of Li‐Zhong‐Xiao‐Pi granules in the treatment of gastric precancerous lesions
Authors: Liu Chenchen , Chen Huiling , Zhang Yida , Li Meng , Jiang Qiyao , Wang Zhendong , Yu Liangwen , Wang Qi , Pan Huafeng , Zhuo Yue 
Published: January 2023

AbstractLi‐Zhong‐Xiao‐Pi granules (LZXP) are effective for treating gastric precancerous lesions (GPL) in traditional Chinese medicine. However, the active compounds of LZXP and their potential therapeutic mechanism in GPL remained unclarified. The purpose of this study is to investigate the chemical composition and potential targets of LZXP. Based on the accurate masses, ion fragments, and literature data, a total of 128 compounds were identified in the LZXP sample using ultra‐performance liquid chromatography and quadrupole time‐of‐flight mass spectrometry (UPLC–Q‐TOF–MS) in both positive and negative ion modes, and 28 of these compounds were exactly determined by comparison with authentic reference standards. Meanwhile, 11 typical components were quantified via UPLC during a 24 min period. The linearity, accuracy, stability and recovery of the method were all proven. Through the network pharmacological analysis, six chemicals (quercetin, 4′‐hydroxywogonin, sinensetin, 5, 7, 8, 3′, 4′‐pentamethoxyflavanone, 8‐gingerdione and quercetin) were identified as the active ingredients, and five LZXP targets (AKT1, CYP1B1, PTGS2, MMP9 and EGFR) were found to be the crucial molecules in the treatment of GPL. This study provides a systematic and applicable method for the rapid screening and identification of the chemical constituents from LZXP, and an effective understanding the mechanism of LZXP in the treatment of GPL.
A laparoscopic approach to address massive splenomegaly, symptomatic cholelithiasis, and a planned postoperative pregnancy: A case report
Authors: Bishop Alexandra A. , Krohn Eric , Vakayil Victor R. , Pribyl Kyle , Reding Mark T. , Tignanelli Christopher , Harmon James V. 
Published: January 2023

AbstractWe report long‐term follow‐up of a patient who underwent a tailored laparoscopic procedure for symptomatic cholelithiasis, massive splenomegaly, and a planned pregnancy. There were no complications, and the patient remained symptom‐free at the 5‐year follow‐up. We supplemented our case report with national surgical data demonstrating the safety of laparoscopic splenectomy.
A case of Candida metapsilosis conjunctivitis in a neonate admitted to the cardiac heart intensive care unit
Authors: Aboutalebian Shima , Charsizadeh Arezoo , Eshaghi Hamid , Nikmaesh Bahram , Mirhendi Hossein 
Published: January 2023

AbstractHarmless commensal Candida species, especially uncommon and rare ones may rarely cause a serious infection. Candida metapsilosis is a recently described yeast that is phenotypically indistinguishable from Candida parapsilosis and molecular methods are essential for its identification. We report the first case of Candida conjunctivitis due to C. metapsilosis obtained from the eye discharge of a 40‐day‐old girl with congenital heart disease admitted to the cardiac intensive care unit (CICU). The yeast isolate was identified by sequencing the entire ITS1‐5.8 rRNA‐ITS2 region. Antifungal susceptibility testing performed according to the CLSI M27‐A3 showed that the isolate was susceptible to amphotericin B, fluconazole, itraconazole, voriconazole, clotrimazole, nystatin, terbinafine, 5‐fluorocytosine, and caspofungin. Differentiation of the fungal new species allows us the accurate diagnosis and treatment, and a better understanding the microbial epidemiology.
Synthesis of High‐Value Tricarballylate Plasticizers Directly from Citric Acid Esters on Bifunctional Pd/Nb2O5.nH2O Catalysts
Authors: Stuyck Wouter , Windels Simon , Wilms Giel , De Vos Dirk E. 
Published: January 2023

AbstractTricarballylate esters are considered as an appealing class of biobased plasticizers. This work focusses on the production of tricarballylate esters from citrate esters through a one‐pot sequential dehydration‐hydrogenation process, in order to circumvent the undesired decarboxylation side reaction in the synthesis of tricarballylic acid directly from citric acid. High yields up to 93 % of different tricarballylate esters were obtained with a self‐synthesised bifunctional 0.2 wt % Pd/Nb2O5.nH2O catalyst employed in methylcyclohexane as inert solvent.
Forced Precipitation Experiments for Study of the Electromagnetic Treatment of Water
Authors: Saquete‐Ferrándiz María Dolores , Boluda‐Botella Nuria , Martínez‐Moya Sergio , García‐Quiles Jaime 
Published: January 2023

AbstractThe objective of this research is to determine the effect of the electromagnetic equipment TK3K to prevent incrustations in pipes. A method of forced precipitation of calcium carbonate, mixing solutions of Ca(NO3)2 and Na2CO3 with tap water, indicates differences in the temporal evolution of turbidity, absorbance, and in the final size of the particles formed, which makes it possible to distinguish between treated and untreated water. The latter presents higher values of parameters analyzed than the treated one. A longer treatment time does not produce different results, while an increase in temperature causes a greater decrease. Since there is no immediate technique on the market to verify the effect of electromagnetic treatment, this method, with temperature control, is simple and fast.
Experimental Study on the Scalability of Planetary Roller Extruders
Authors: Radwan Mario , Frerich Sulamith Christiane 
Published: January 2023

AbstractThis contribution aims at developing scaling algorithms for planetary roller extruders (PREs). Laboratory‐ and production‐scale experiments were carried out, using thermoplastic polymers according to a statistical design of experiments (DOE). By comparing plant size, spindle configuration, operating parameters, and material properties, their influence on pressure build‐up capacity, process temperatures, and residence time distribution is analyzed. All data generated are used to train MATLAB‐based machine learning models. First indications hint at Gaussian processes and artificial neural networks, predicting operating parameters with high accuracy.
Across the Dimensions: A Three‐Component Self‐Assembly of Pentaphosphaferrocene‐based Coordination Polymers
Authors: Grill Kevin , Dinauer Sabrina B. , Peresypkina Eugenia , Virovets Alexander V. , Scheer Manfred 
Published: January 2023

AbstractPentaphosphaferrocenes [CpRFe(η5‐P5)] (Cp*=η5‐C5Me5) (A), Cp’’=η5‐C5H3tBu2‐1,3 (B)) are excellent building blocks for polymeric assemblies in supramolecular chemistry in combination with coinage metal salts of weakly coordinating anions such as AgSbF6. Adding rigid aromatic dinitriles ortho/meta/para‐(NC)2C6H4 in a one‐pot reaction between [CpRFe(η5‐P5)] and AgSbF6 leads to various coordination polymers (CPs) by a three‐component self‐assembly. The sterical demand of the differently substituted cyclopentadiene ligands as well as the rigid constitution of the isomeric dinitriles (NC)2C6H4 play a key role in the formation of the isolated CPs. All CPs were characterized by NMR spectroscopy, mass spectrometry, elemental analysis, and single‐crystal X‐ray diffraction.
Enabling Long‐Lived Polymeric Room Temperature Phosphorescence Material in Abominable Solvent
Authors: Zhou Qian , Li Chen , Wang Yongkang , Chen Qingao , Huang Jiayue , Zhu Yin , Li Qiankun , Yang Chaolong 
Published: January 2023

AbstractLong‐lived polymeric room temperature phosphorescence (RTP) materials have drawn more attention due to their convenient preparation process and equally efficient phosphorescence performance in recent years. As the polymer matrix is sensitive to air and humidity, some non‐covalent interactions in the matrix are easily decomposed in water or air, which means that it is difficult for this material to be stored stably for a long time in the atmospheric environment or under harsh conditions. In this work, polymer powder mBPipQ contains aromatic and piperidine rings that are designed and synthesized successfully. Then the polymer is uniformly dispersed into epoxy resin matrix to form long‐lived polymeric RTP material with efficient afterglow properties. The stiff backbone structure of mBPip and dense molecular arrangement of epoxy resin provide a rigid environment to stabilize triplet excitons, the RTP performance is greatly enhanced. The lifetime of mBPipQ in epoxy resin is 2 times higher than that of small molecule chromophore in that one. Interestingly, after soaking in strong acid or alkali solution for 10 days, the material can still emit stable and efficient long‐lived phosphorescence. It is thanks to the hard matrix after full curing, which can provide a protective layer to prevent external quenchers from interfering with phosphorescence emission. Utilizing the efficient phosphorescence emission and excellent abominable‐solvent resistance of this RTP material, multilevel information encryption has been successfully demonstrated. This work broadens the application scope of polymeric RTP materials in harsh environments and provides a new idea for achieving efficient RTP emission.
Distributed job allocation using response threshold for heterogeneous robot team under deadline constraints
Authors: Joseph Dani Reagan Vivek , Ramapackiyam Shantha Selvakumari 
Published: January 2023

SummaryJob allocation among the robots is a significant challenge in a multi‐robot environment. This article proposes a distributed algorithm for job allocation with deadline constraints. It works utilizing the response threshold model inspired by job distribution among insect societies in nature. The team divides the jobs among themselves based on their threshold capacity. The proposed approach focus on maximizing the total jobs completed with the available resources. The static case where the robots never fail is considered first for evaluating the algorithm. Then it is run in a dynamic environment with robot failure to study the effects on job allocation. Two experimental studies are conducted with varying amounts of resources. In static and dynamic cases under experimental study I, the jobs completion percentage increased by an average of 37.6% and 35.8%, respectively, over the existing method. Under experimental study II, the proposed algorithm completed all the jobs with improved resource utilization. The results show that the proposed algorithm achieves better jobs completion. The algorithm is then tested in a real‐world experimental environment using FireBird V mobile robots under static and dynamic cases. The outcomes indicate that the proposed approach is efficient in job allocation in practical circumstances.