bluuebunny/crossref_metadata_2025_split huggingface dataset:
Synthesis of zeolite W from alkali fusion activated K‐feldspar by gel‐like‐solid phase method
Authors: Sui Yujia , Yang Kai , Li Yun , Cao Jilin 
Published: November 2022

AbstractZeolite W with the spindle morphology has been rapidly synthesized from alkali fusion activated K‐feldspar via gel‐like‐solid phase method after supplementing a small amount of silica‐aluminum xerogel. The effects ofn(H2O)/n(SiO2),m(activation product)/m(xerogel), and crystallization time on the synthesis of zeolite W were investigated. The optimal synthesis conditions werem(activation product)/m(xerogel) of 3.92,n(H2O)/n(SiO2) of 25.8, and crystallization time of 12 h. The synthesized zeolite W was used to extract K+ion from the simulated seawater. The synthesized zeolite W with the fluffier spindle morphology exhibited a higher K+extraction capacity. The maximum exchange capacity of zeolite W for K+ion reached 49.57 mg·g−1. The zeolite W synthesized by the gel‐like‐solid phase method possessed a superior K+extraction capacity than that synthesized by the hydrothermal method when K‐feldspar was used as the raw material and an approximate K+extraction capacity with that synthesized from chemical reagents. In addition, the recycling process of the mother liquor was designed. This work provides an effective way for the zeolite W synthesis and the resource utilization of K‐feldspar with advantages of high raw material utilization, low water content in the synthesis system, short crystallization time, and recyclable mother liquor after synthesis of zeolite W.
Morphology biased pharmacological and mechanical properties of nanosized block copolymers of PNIPAM with polyethylene oxide and polyaminoacids in presence of polycaprolactone
Authors: Bharatiya Debasrita , Parhi Biswajit , Swain Sarat K. 
Published: November 2022

AbstractThis work targets to develop amphiphilic self‐assembled PEO‐b‐PAAs‐b‐PNIPAM and PEO‐b‐PAAs‐b‐PNIPAM@PCL nanosized block copolymers (NBCPs) of poly N‐isopropyl acrylamide (PNIPAM) with polyethylene oxide (PEO), and poly amino acids (PAAs) with and without polycaprolactone (PCL) via ring‐opening and condensation polymerization methods. The interesting ring necklace and petunia bell‐shaped flower‐like morphology play an important role in both mechanical behavior and pharmacological actions. The PEO‐b‐PAAs‐b‐PNIPAM@PCL NBCP exhibits a notable antibacterial activity against gram‐negative (Escherichia coli) and gram‐positive (Staphylococcus aureus) with ZOI of 20 ± 4 mm and 18 ± 3 mm, respectively, with MIC 250 μg/ml. The mechanical properties of the NBCPs are measured at room temperature. The PEO‐b‐PAAs‐b‐PNIPAM@PCL NBCP possesses a higher value in each case compared to the neat polymer with the UTS 1.4651 MPa, Y 0.0050 MPa, Tensile strength at yield (1.4048 MPa), TS at break (1.4640 MPa), % elongation at yield (23.5%), elongation % at break (124%) and proportional limit (1.0082 MPa at 8%), respectively. With the improved mechanical strength, effective antibacterial activities along with sustainable drug release rate, the designed material can be used as a potential material for different biomedical applications.
Improving glass‐fiber epoxy composites via interlayer toughening with polyacrylonitrile/multiwalled carbon nanotubes electrospun fibers
Authors: Narváez‐Muñoz Christian , Zamora‐Ledezma Camilo , Ryzhakov Pavel , Pons‐Prats Jordi , Elango Jeevithan , Mena Carlos , Navarrete Freddy , Morales‐Flórez Víctor , Cano‐Crespo Rafael , Segura Luis Javier 
Published: November 2022

AbstractThe development of innovative engineered epoxy composites aiming to manufacture cost‐efficient materials with reduced weight and enhanced physical properties remains as a current industrial challenge. In this work we report an original procedure for manufacturing glass‐fiber epoxy reinforced nanocomposites (GFECs) by employing electrospun fiber‐mats as a reinforcing phase. These fibers have been produced from polyacrylonitrile and multiwalled carbon nanotubes solutions. Optimal protocols are designed by combining Taguchi method with the morphological, structural and mechanical properties obtained by scanning electron microscopy, profilometry and tensile tests. It is demonstrated that GFECs fabricated using GF800 glass fiber show an improvement/enhancement of the mechanical properties with a fracture strain up to 500 MPa (around 20% higher than the non‐reinforced epoxy composite counterpart). It is also shown that GFECs fabricated using GF3M glass fiber exhibited a reduction of the roughness up to 56%, which corresponds with a roughness improvement from N8 to N7 following the guidelines provided by the ISO 1302. These results suggest that this type of nanocomposites would be suitable to be used in the aeronautics and automotive industries.
Simple fabrication of an electrospun polystyrene microfiber filter that meetsN95filtering facepiece respirator filtration and breathability standards
Authors: Jensen Madeline G. , O'Shaughnessy Patrick T. , Shaffer Marlee , Yu Sooyoun , Choi Yun Young , Christiansen Megan , Stanier Charles O. , Hartley Michael , Huddle Joey , Johnson Jed , Bibby Kyle , Myung Nosang V. , Cwiertny David M. 
Published: November 2022

AbstractDuring the global spread of COVID‐19, high demand and limited availability of melt‐blown filtration material led to a manufacturing backlog of N95 Filtering Facepiece Respirators (FFRs). This shortfall prompted the search for alternative filter materials that could be quickly mass produced while meeting N95 FFR filtration and breathability performance standards. Here, an unsupported, nonwoven layer of uncharged polystyrene (PS) microfibers was produced via electrospinning that achieves N95 performance standards based on physical parameters (e.g., filter thickness) alone. PS microfibers 3–6 μm in diameter and deposited in an ~5 mm thick filter layer are favorable for use in FFRs, achieving high filtration efficiencies (≥97.5%) and low pressure drops (≤15 mm H2O). The PS microfiber filter demonstrates durability upon disinfection with hydroxyl radicals (•OH), maintaining high filtration efficiencies and low pressure drops over six rounds of disinfection. Additionally, the PS microfibers exhibit antibacterial activity (1‐log removal ofE. coli) and can be modified readily through integration of silver nanoparticles (AgNPs) during electrospinning to enhance their activity (≥3‐log removal at 25 wt% AgNP integration). Because of their tunable performance, potential reusability with disinfection, and antimicrobial properties, these electrospun PS microfibers may represent a suitable, alternative filter material for use in N95 FFRs.
Effect of accelerated aging on properties of biobased polymer films applicable in printed electronics
Authors: Luoma Enni , Välimäki Marja , Immonen Kirsi 
Published: November 2022

AbstractThe growing interest in sustainable, lightweight, bendable roll‐to‐roll manufactured printed electronics applied to packaging, textiles or medical healthcare has led to the need for materials that can withstand various environmental conditions. In this work, the studied materials were polyethylene terephthalate (PET), typically used as a substrate for printed electronics, and it was compared to biobased polymeric substrates bio‐PET, polylactic acid (PLA), cellulose acetate propionate (CAP) and regenerated cellulose film Natureflex™. Films were exposed for 500 h to heat (50.5°C); heat and humidity (50 RH%); heat, humidity, and light (UV‐A 300–400 nm, 42 W/m2) and temperature cycles in the range of −45°C to 65°C. Changes in film transparency and mechanical properties were analyzed. The main findings were that during the exposure to only elevated temperature and temperature with humidity, the analyzed properties were retained in all film materials. UV‐A caused less or no changes in Natureflex™, bio‐PET and PLA. The most stable in thermal cycling was Natureflex™, CAP, and PET. These results may open new possibilities for biopolymers in printed electronics applications.
Fabrication of flexible carbon dioxide gas sensor with conductive polymer/reduced graphene oxide hybrids: Effects of substrate type and mass ratio
Authors: Jee Chong Eu , Chow Mei Kei , Yeap Swee Pin 
Published: November 2022

AbstractFlexible gas sensors made of polyaniline (PANI)‐reduced graphene oxide (rGO) nanocomposite were prepared using three different substrates, namely filter paper, cotton fabric, and weighing paper, through in‐situ reduction of GO and in‐situ polymerization of aniline. Preliminary analysis showed that the PANI/rGO coated on filter paper possesses a superior electrical conductance than PANI/rGO coated on cotton fabric and weighing paper. Such observation was attributed to the good attachment of the PANI/rGO nanocomposites onto the high‐density mesh‐like structure of the filter paper with rough surfaces. In contrast, PANI/rGO coated onto weighing paper and cotton fabric of different surface structures presented lower‐to‐almost negligible conductance. Accordingly, PANI/rGO filter paper was selected for the subsequent evaluation of gas sensing properties. The gas‐sensing performances of the PANI/rGO filter paper sensors indicated that the 5 wt% PANI/rGO (i.e., 5 wt% rGO) sample exhibited the best response of 306% for 500 ppm carbon dioxide (CO2) gas at room temperature with a recovery rate of 41.5%. On the other hand, the optimum recovery rate of 59.5% was identified at 0.5 wt% PANI/rGO sample which exhibited a response of 155%. Owing to the synergy effect, the PANI/rGO sensor outperformed the sensor made of pure PANI or pure rGO.
Preparation of DOPO‐derived magnesium phosphate whisker and its synergistic effect with ammonium polyphosphate on the flame retardancy and mechanical property of epoxy resin
Authors: Wang Song , Wu Weidong , Chen Qi , Ding Zhan , Li Sanxi , Zhang Ailing , Tang Tao , Liu Jie , Okoye Patrick U. 
Published: November 2022

AbstractIn this study, a magnesium phosphate whisker (DPM‐H) was synthesized by the acid–base neutralization reaction between magnesium hydroxide and 10‐hydroxy‐9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide (DOPO‐OH) at 120°C. A new synergistic intumescent flame retardant (IFR) for epoxy resin (EP), which was composed of DPM‐H and ammonium polyphosphate (APP) was thoroughly studied. When the IFR loading was 8%, with the DPM‐H to APP weight ratio at 1:7, the prepared flame‐retardant EP (EPDA‐2) passed the vertical burning tests (UL‐94) V‐0 rating and obtained the limiting oxygen index (LOI) value of 29.3%. Microscale combustion calorimetry (MCC) results showed that the total heat release (THR) of EPDA‐2 reduced by 32.1% compared with pure EP. Meanwhile, the addition of DPM‐H can partially solve the problem of the decrease of the EP mechanical property caused by the addition of APP. Compared with the flame‐retardant EP with the 8% loading of APP, the impact strength of EPDA‐2 increased 152.3%.
Simultaneous stabilization of nonlinear systems with different and multiple time‐varying delays
Authors: Dastaviz Abbas , Binazadeh Tahereh 
Published: November 2022

AbstractThe simultaneous stabilization is addressed for a collection of nonlinear systems with multiple time‐varying delays. The time delays vary not only from one system to the other but even from one state to another within a system. The nonlinear functions may also be different for each system of the collection. A delay‐independent simultaneously stabilizing control law is presented by developing a Control Lyapunov‐Krasovskii Functional (CLKF) method. This controller has a unified structure for all the systems and, despite differences in nonlinearities and delays, leads to the stabilization of all the systems, simultaneously. During the design procedure, first, a systematic approach is provided to construct a CLKF of a particular form for each system. Second, a simultaneously stabilizing control law is defined based on the constructed CLKFs. Finally, a practical example is given to verify the efficiency and applicability of the given method.
Preparation of gastrodin‐modified dendrimer‐entrapped gold nanoparticles as a drug delivery system for cerebral ischemia–reperfusion injury
Authors: Huang Wenqiang , Wang Lanlin , Zou Yanghong , Ding Xiangqian , Geng Xin , Li Jinghui , Zhao Hexiang , Qi Renli , Li Shipeng 
Published: November 2022

AbstractObjectiveThis study sought to evaluate the feasibility of multifunctional gastrodin (GAS)‐containing nano‐drug carrier system against cerebral ischemia–reperfusion injury (CIRI).MethodsThe drug‐loaded nanocomposite (Au‐G5.NHAc‐PS/GAS) with certain encapsulation efficiency (EE) was prepared by physical adsorption method using different proportions of GAS and drug‐carrying system (Au‐G5.NHAc‐PS). High‐performance liquid chromatography was used to determine the drug loading and EE. Cultured rat astrocytes and hypothalamic neurons were assigned into four groups: PBS, Au‐G5.NHAc‐PS, Au‐G5.NHAc‐PS/GAS, and GAS. CCK‐8 assay, flow cytometry, and quantitative real‐time PCR were performed to examine the cell viability, apoptosis, and the expression of tumor necrosis factor‐α (TNF‐α), IL‐1β, and IL‐6 in the astrocytes and hypothalamic neurons, respectively. Cellular uptake of GAS and Au‐G5.NHAc‐PS/GAS was analyzed by using Hoechst 33342 staining. The animal model with focal cerebral ischemia was generated by middle cerebral artery occlusion (MCAO) in healthy male Sprague Dawley (SD) rats, and pathological changes of brain tissue and major organs in the rats were identified by hematoxylin and eosin (HE) staining. Apoptosis in rat astrocytes and hypothalamic neurons was detected by TUNEL staining and flow cytometry.ResultsAu‐G5.NHAc‐PS had a spherical shape with a uniform size of 157.3 nm. Among the nanoparticles, Au‐G5.NHAc‐PS/GAS with an EE of 70.3% displayed the best release delay effect. Moreover, we observed that in vitro cytotoxicity and cellular uptake of Au‐G5.NHAc‐PS/GAS were higher than those of GAS, whereas the expression of TNF‐α, IL‐1β, and IL‐6 was significantly downregulated in Au‐G5.NHAc‐PS/GAS group as compared to G5.NHAc‐PS group. Notably, HE staining revealed that although Au‐G5.NHAc‐PS/GAS had no toxic and side effects on the main organs of rats, it alleviated the damage of brain tissue in the MCAO rats. Besides, Au‐G5.NHAc/GAS markedly reduced MCAO‐induced apoptosis.ConclusionAu‐G5.NHAc‐PS showed favorable surface morphology, sustained drug release ability, no measurable toxicity, and good biocompatibility, indicating that GAS exerts anti‐inflammatory and antiapoptotic effects on CIRI.
A postpartum enriched environment rescues impaired cognition and oxidative markers in aged mice with gestational inflammation
Authors: Zhang Yu‐Xin , Wei Qi‐Yao , Wang Ya‐Tao , Zeng Li‐Ping , Sun Shi‐Yu , Wu Yong‐Fang , Ren Chong‐Yang , Wang Fang , Chen Gui‐Hai , Cao Lei 
Published: November 2022

AbstractIntroductionPrevious studies have shown that gestational inflammation can accelerate age‐associated cognitive decline (AACD) in maternal mice; enriched environments (EEs) have been reported to protect normally aging mice from AACD and improve mitochondrial function. However, it is unclear whether the nitrosative stress‐related proteins tet methylcytosine dioxygenase 1 (TET1) and S‐nitrosoglutathione reductase (GSNOR) are involved in the accelerated aging process of gestational inflammation and whether EEs can slow this process.MethodsIn this study, CD‐1 female mice on the 15th day of pregnancy were injected with bacterial lipopolysaccharide (50 μg/kg; LPS group) or an equivalent amount of normal saline (CON group) from the abdominal cavity for 4 consecutive days. Twenty‐one days after delivery, half of the LPS‐treated mice were randomly selected for EE until the end of the behavioral experiment (LPS‐E group). When the female rats were raised to 6 months and 18 months of age, the Morris water maze (MWM) was used to detect spatial learning and memory ability; RT‐PCR and Western blots were used to measure the mRNA and protein levels of hippocampal TET1 and GSNOR.ResultsAs for the control group, compared with 6‐month‐old mice, the spatial learning and memory ability of 18‐month‐old mice decreased, and the hippocampal TET1 and GSNOR mRNA and protein levels were decreased. Gestational inflammation exacerbated these age‐related changes, but an EE alleviated the effects. Pearson's correlation analysis indicated that performance during the learning and memory periods in the MWM correlated with the levels of hippocampal TET1 and GSNOR.ConclusionsOur findings suggest that gestational inflammation accelerates age‐related learning and memory impairments and that postpartum EE exposure could alleviate these changes. These effects may be related to hippocampal TET1 and GSNOR expression.
Changes in functional connectivity in newly diagnosed self‐limited epilepsy with centrotemporal spikes and cognitive impairment: An MEG study
Authors: Li Yihan , Chen Jinan , Sun Jintao , Jiang Ping , Xiang Jing , Chen Qiqi , Hu Zheng , Wang Xiaoshan 
Published: November 2022

AbstractPurposeOur purpose was to explore the relationship between cognitive impairment and neural network changes in patients newly diagnosed with self‐limited epilepsy with centrotemporal spikes (SeLECTS).MethodsThe Wechsler Intelligence Scale for Children, fourth edition was used to divide all SeLECTS patients into two groups: patients with full‐scale intelligence quotient (FSIQ) below 80 that corresponded to cognitive impairment, and patients with FSIQ above 80 that corresponded to a normal cognitive function. The data on the resting state were recorded using magnetoencephalography. The properties of the networks were analyzed using graph theory (GT) analysis.ResultsThe functional connectivity (FC) of the frontal cortex in patients with FSIQ < 80 was reduced in the 12–30 Hz frequency band, and the FC of the posterior cingulate cortex was reduced in the 80–250 and 250–500 Hz frequency bands. The GT analysis showed that patients in the FSIQ < 80 group had higher strength in the 8–12 and 12–30 Hz frequency bands than those in the healthy control and FSIQ > 80 group. However, the path length was reduced in the 80–250 Hz band, and the clustering coefficient was reduced in the 12–30, 80–250, and 250–500 Hz frequency bands. Moreover, the receiver operator characteristic analysis showed that the clustering coefficient in the 12–30 and 80–250 Hz frequency bands, as well as the path length in the 80–250 Hz frequency band possessed a good discriminative ability in distinguishing the FSIQ > 80 group.ConclusionsSeLECTS patients with cognitive impairment in the early stage of the disease developed disordered networks in cognitive‐related brain regions. The clustering coefficient in the 12–30 and 80–250 Hz frequency bands as well as the path length in the 80–250 Hz frequency band might be good indicators to distinguish the cognitive impairment of SeLECTS patients at the early stage.
Rational design of a genome‐based insulated system in Escherichia coli facilitates heterologous uricase expression for hyperuricemia treatment
Authors: He Lina , Tang Wei , Huang Ling , Zhou Wei , Huang Shaojia , Zou Linxuan , Yuan Lisha , Men Dong , Chen Shiyun , Hu Yangbo 
Published: November 2022

AbstractHyperuricemia is a prevalent disease worldwide that is characterized by elevated urate levels in the blood owing to purine metabolic disorders, which can result in gout and comorbidities. To facilitate the treatment of hyperuricemia through the uricolysis, we engineered a probiotic Escherichia coli Nissle 1917 (EcN) named EcN C6 by inserting an FtsP‐uricase cassette into an “insulated site” located between the uspG and ahpF genes. Expression of FtsP‐uricase in this insulated region did not influence the probiotic properties or global gene transcription of EcN but strongly increased the enzymatic activity for urate degeneration, suggesting that the genome‐based insulated system is an ideal strategy for EcN modification. Oral administration of EcN C6 successfully alleviated hyperuricemia, related symptoms and gut microbiota in a purine‐rich food‐induced hyperuricemia rat model and a uox‐knockout mouse model. Together, our study provides an insulated site for heterologous gene expression in EcN strain and a recombinant EcN C6 strain as a safe and effective therapeutic candidate for hyperuricemia treatment.
Increased risk of death from pneumonia among cancer survivors: A propensity score‐matched cohort analysis
Authors: Tanaka Shiori , Inoue Manami , Yamaji Taiki , Iwasaki Motoki , Minami Tetsuji , Tsugane Shoichiro , Sawada Norie ,   the JPHC Study Group
Published: November 2022

AbstractBackgroundThe repeated global pandemic of the new virus has led to interest in the possibility of severe pneumonia among cancer patients and survivors. Here, we aimed to assess the association between incident cancer and risk of death from pneumonia in Japanese in a large population‐based cohort study.MethodsWe used the data from The Japan Public Health Center‐based Prospective Study (JPHC Study), which enrolled subjects aged 40 to 69 between 1990 and 1994 and followed their cancer incidence and mortality until 2013. After identifying 103,757 eligible subjects for analysis and imputing missing data on covariates by the chained equations approach, we conducted propensity score‐matched analysis for 1:4 matching, leaving 14,520 cases diagnosed with cancer and 48,947 controls without cancer during the study period for final analysis. A Cox proportional hazards regression model was used to estimate the hazard ratio (HR) and corresponding confidence interval (CI) for the risk of death from pneumonia with comparison of cancer cases and cancer‐free controls.ResultsCompared to cancer‐free individuals, risk of death from pneumonia was significantly higher among those who had any diagnosed cancer (HR, 1.41; 95%CI, 1.08–1.84); those within 1 year of diagnosis (HR, 23.0; 95% CI, 2.98–177.3); within 1 to <2 years (HR, 3.66; 95% CI, 1.04–12.9); and those with regional spread or distant metastatic cancer at initial diagnosis (HR, 2.01; 95% CI, 1.26–3.21). A history of lung, oesophageal, and head and neck cancer conferred the higher risk among site‐specific cancers.ConclusionWe found a positive association between incident cancer and risk of death from pneumonia in this study. These results imply the possibility that the immunocompromised status and respiratory failure due to antitumor treatment may have resulted in a more severe outcome from pneumonia among cancer survivors than the general population.
Struct2Hair: A hair shape descriptor for hairstyle modeling
Authors: Zhang Wenshu , Nie Yinyu , Guo Shihui , Chang Jian , Zhang Jianjun , Tong Ruofeng 
Published: November 2022

AbstractIn recent years, it becomes possible to extract hair information for hair reconstruction from multiple cameras or monocular camera. Using a single image as the input avoids the high cost setups and complex calibration compared to multiviewed reconstruction. Taking advantage of an extendible hairstyle database, this paper introduced Struct2Hair, a novel single‐viewed hair modelling approach by extracting hair shape descriptor (HSD). The HSD is defined as the fundamental structure‐aware feature, which is a combination of critical shapes in a hairstyle. A complete dataset of critical hair shapes is constructed from a known database of three‐dimensional (3D) hair models. We first analyze the input two‐dimensional (2D) image to extract the orientation information and 2D hair sketch automatically. The extracted information is then used to retrieve the corresponding critical shapes with optimization to build the robust HSD. Finally, the HSD constructs a weighted 3D hair orientation field to guide full‐head hair model generation. Our method can preserve local geometric features of hair and retain the whole shape of the hairstyle globally owing to the HSD, which will benefit further hair editing and stylization.