bluuebunny/crossref_metadata_2025_split huggingface dataset:
Synthesis and characterization of azo cross‐linked polymer as a new catalyst for the production of hydrogen gas by methanolysis of NaBH4
Authors: Gokkus Kutalmis , Gür Mahmut , Bütün Vural 
Published: August 2024

AbstractThe intensive use of fossil fuels has profound impacts on all ecosystems, primarily contributing to global warming through greenhouse gas emissions. To mitigate these impacts, alternative energy sources like hydrogen are crucial. In this study, azo cross‐linked polymer with 4‐aminophenyl sulfone and resorcinol were synthesized by a green synthesis method. The polymer was extensively characterized by Fourier‐transform infrared spectroscopy, Brunner‐Emmett‐Teller analysis, thermogravimetric analysis, and scanning electron microscopy‐energy dispersive x‐ray spectroscopy analyses. Subsequently, the catalytic performance of the polymer in hydrogen production from NaBH4 via methanolysis was investigated. At this stage, the parameters affecting hydrogen production (catalyst and NaBH4 amounts, MeOH volume and temperature) were systematically studied to determine optimum conditions. The maximum HGR values of the polymer was 13,100 and 27,000 mL min−1 gcat−1 at 30 and 60°C, respectively and its activation energy was 10.45 kJ mol−1. After optimization, the reusability of azo polymer was tested with 5 cycles. The theoretical volume of hydrogen was produced in all 5 cycles. But with each cycle, the hydrogen production time increased. The main purpose of this study was to demonstrate novel azo‐linked polymers with high catalytic activity in hydrogen production. The results revealed significant potential of the polymer for hydrogen generation. Overall, this research highlights the promising role of azo cross‐linked polymers as effective catalysts for hydrogen production, offering new perspectives and pathways towards sustainable energy solutions.
Dope dyeing of tannic acid modified ultra‐high molecular weight polyethylene fabric
Authors: Ahmad Muhammad , Ke Guizhen , Chen Chunmei 
Published: August 2024

AbstractIn this study, we examined dyeing behavior of tannic acid modified ultra high molecular weight polyethylene fabric. Whole study was conducted to see the effect of tannic acid on dope dyeing performance of the fabric. Tannic acid and its complex with sodium salt TA‐Na+ complex were used for pretreatment. After dope dyeing, the color strength of fabrics, color fastness, surface morphology, and fiber structure were characterized by k/s value, color difference, scanning electron microscopy (SEM), electron dispersive spectroscopy (EDS), and Fourier transform infrared spectroscopy (FTIR), respectively. The effect of treatment conditions was also discussed. The results had shown better color strength and washing fastness were obtained after tannic acid treatment, especially after TA‐Na+ complex treatment. SEM observation indicated the tannic acid adhesion on fabric surface. Both EDS and FTIR results showed the enhancement of surface polarity. And the UHMWPE fabric treated with 1% (w/v) TA‐Na+ with pH ranging 4–5 for 6 h showed better color durability over time. Approach was suitable because of sustainable, green behavior of tannic acid and entire process had a low cost.
Sustainable polyurethane coatings derived from alkyds of Camelina oil monoglycerides
Authors: Nadim Elham , Paraskar Pavan , Hesabi Mohammadnabi , Yahyaei Hossein , Murphy Emma J. , Major Ian 
Published: August 2024

AbstractThis study presents the synthesis of sustainable urethane coatings derived from alkyds of Camelina oil (CO) monoglycerides, offering a sustainable alternative to petrochemical resources. Utilizing immobilized lipase for a low‐temperature glycerolysis reaction, high‐yield monoglycerides were obtained from CO. These were then reacted with dibasic acids (phthalic, succinic, and maleic anhydride) to produce alkyd diols, confirmed by both nuclear magnetic resonance (NMR) and Fourier transform infrared (FTIR) spectroscopy. The hydroxyl functionality of the alkyd diols showed a significant enhancement (up to 2200%) over crude CO produced Camelina‐based alkyd diols were incorporated into polyurethane formulations and applied to metal substrates. Comprehensive performance evaluations revealed their superior mechanical, thermal, and chemical properties in comparison with previously reported plant‐based alkyd‐urethane coatings, especially for the phthalic anhydride‐derived alkyd diol. The present research underscores the potential of Camelina‐derived alkyds in creating high‐performance, plant‐based coatings, aligning with recent sustainability trends in material science.
DOPO chemically modified mesoporous silica composites: Preparation, flame retardancy, and thermodynamic properties
Authors: Tian Miaomiao , Chen Yajie , Zhang Qiaoran , Zhao Xiaowei , Li Xiaohong , Zhang Zhijun , Li Zhiwei 
Published: August 2024

AbstractOrganic flame retardant 9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide (DOPO) was used to decorate the pores of mesoporous silica (m‐SiO2) nanospheres to prepare a new composite flame retardant (DK‐SiO2). The content of DOPO in DK‐SiO2 is about 17 wt%. Due to the chemical bonding, DK‐SiO2 not only enhances the flame retardant performance, but also effectively avoids adverse effects of DOPO on the glass transition temperature and mechanical properties of epoxy resin (EP). At 9 wt% loading, the limiting oxygen index of the EP increased from 25.7 to 31.2, and successfully passed the UL‐94 V‐0 rating. Besides, DK‐SiO2 can significantly reduce the peak heat release rate, total heat release, and total smoke production of EP, with reductions of 26%, 32%, and 20.8%, respectively. Compared with the simple blended sample, DK‐SiO2 not only has better flame retardant performance but also shows significant advantages in thermodynamic properties. The glass transition temperature, impact, and tensile strength, as well as storage and flexural modulus have been improved. This excellent flame retardant performance is mainly attributed to the gas‐condensed synergistic flame retardant mechanism between DOPO and m‐SiO2. The good thermodynamic performance is due to the excellent dispersion of DK‐SiO2 nanospheres in the EP.
Exploring Green Fluorescent Protein Brownian Motion: Temperature and Concentration Dependencies Through Luminescence Thermometry
Authors: Guo Yongwei , Maturi Fernando E. , Brites Carlos D. S. , Carlos Luís D. 
Published: August 2024

AbstractLuminescent nanothermometry emerges as a powerful tool for studying protein dynamics. This technique was employed to perform the first measurement of the temperature dependence of protein Brownian velocity, showcasing the illustrative example of enhanced green fluorescent protein (EGFP) across physiologically relevant temperatures (30−50 °C) and concentrations (40, 60, and 80 × 10−3 kg m−3). EGFP exhibited a concentration‐dependent decrease in Brownian velocity, from (1.47 ± 0.09) × 10−3 m s−1 to (0.35 ± 0.01) × 10−3 m s−1, at 30 °C, mimicking crowded cellular environments. Notably, the protein Brownian velocity increased linearly with temperature. These results demonstrate the suitability of concentrated suspensions for modeling intracellular crowding and validate luminescent nanothermometry for protein Brownian motion studies. Furthermore, the observed linear relationship between the logarithm of the protein Brownian velocity and concentration indicates that EGFP motion is not primarily driven by diffusion, but more of a ballistic transport.
Novel tetrahydropyran‐triazole hybrids with antiproliferative activity against human tumor cells
Authors: Quintana Vanesa , González‐Bakker Aday , Khan Adam N. , Padrón Juan I. , Davyt Danilo , Padrón José M. , Valdomir Guillermo 
Published: August 2024

AbstractA series of new hybrid compounds was prepared combining tetrahydropyran rings with different aromatic systems by means of a 1,2,3‐triazole, using a building block strategy. The design of these structures was guided by Lead‐Likeness and Molecular Analysis (LLAMA) software, adding modifications to our most potent scaffold (the tetrahydropyran ring) to generate promising “lead‐like” candidates, which were subsequently compared against reported anticancer compounds. Our synthesized compounds demonstrated significant antiproliferative activity when compared with the standards cisplatin and 5‐fluorouracil, across a panel of six different tumor cell lines. Moreover, compared with our group's previous hybrid compounds, these new structures exhibit similar activity while offering simpler synthesis and greater potential for structural diversification, a fact that was previously an issue. Further investigations on the most active compounds included assessments of reproductive cell survival, inhibition of cell migration, and effects on nuclear morphology, indicating potential diverse mechanisms of action for these compounds. Pharmacokinetic properties were also calculated for the whole series of compounds using the pkCSM online software.
Serial regression of primary gastric diffuse large B cell lymphoma after Helicobacter pylori eradication therapy: A case report
Authors: Lyu Ting‐Wei , Yu Shan‐Chi , Lin Chien‐Chin 
Published: August 2024

Key Clinical MessagePrimary gastric diffuse large B‐cell lymphoma (DLBCL), a rare malignancy linked to Helicobacter pylori (HP) infection, in this case regressed to low‐grade lymphoma and then achieved complete remission after HP eradication (HPE), highlighting this unique interim change and the potential of HPE as an effective treatment for early‐stage cases.AbstractPrimary gastric diffuse large B‐cell lymphoma (DLBCL) is a rare malignancy. Like gastric mucosa‐associated lymphoid tissue (MALT) lymphoma, HP infection is implicated in lymphomagenesis and has thus emerged as a therapeutic target. Studies have demonstrated the sustained efficacy of HP eradication alone for limited‐stage primary gastric DLBCL. This report presents the case of a 53‐year‐old woman with stage IE gastric DLBCL who received triple therapy for HP eradication and experienced an interim histological transformation to MALT lymphoma, ultimately achieving complete pathologic remission. HP eradication therapy may represent a viable treatment option for patients with early‐stage primary gastric DLBCL.
Incidental finding or the incognito culprit? A case of Mounier‐Kuhn syndrome
Authors: Ozgur Sacide S. , Aiken Arielle , Bathobakae Lefika , Ansari Nida , Michael Patrick , Ismail Mourad 
Published: August 2024

Key Clinical MessageMounier‐Kuhn syndrome, characterized by tracheal dilatation due to the loss of elastic fibers and smooth muscle cells, is a rare condition, often leading to recurrent respiratory infections from impaired mucociliary clearance.
Robust Multiplicative Scatter Correction Using Quantile Regression
Authors: Hemmateenejad Bahram , Mobaraki Nabiollah , Baumann Knut 
Published: August 2024

ABSTRACTA robust method for multiplicative scatter correction (MSC) in infrared spectroscopy is presented. Using quantile regression, the outlier wavelengths (concentration‐dependent wavelengths) that are irrelevant to the regression are identified and therefore excluded from the regression model. This new MCS method, which could be implemented in its simple or extended form, is much simpler than the recently proposed methods and has only one hyperparameter (the quantile value) to be adjusted. To achieve this, a scoring function based on residual analysis can automatically determine the correct quantile value. The method is first explained using simulation data sets and then its validation is explained by analysing some experimental data sets. It was found that our new method can perform well in the presence of strong outlying variables. On the other hand, when the data sets are not associated outlying wavelengths, this method behaves similarly to the conventional MSC method.
Synthesis, Characterization and Photophysical Properties of a New Family of Rare‐Earth Cluster‐Based Metal‐Organic Frameworks
Authors: Bicalho Hudson A. , Copeman Christopher , Barbosa Helliomar P. , Rafael Donnarumma P. , Davis Zoey , Quezada‐Novoa Victor , Velazquez‐Garcia Jose de J. , Liu Nan , Hemmer Eva , Howarth Ashlee J. 
Published: August 2024

AbstractIn this work, nine new rare‐earth metal–organic frameworks (RE‐MOFs, where RE=Lu(III), Yb(III), Tm(III), Er(III), Ho(III), Dy(III), Tb(III), Gd(III), and Eu(III)) isostructural to Zr‐MOF‐808 are synthesized, characterized, and studied regarding their photophysical properties. Materials with high crystallinity and surface area are obtained from a reproducible synthetic procedure that involves the use of two fluorinated modulators. At the same time, these new RE‐MOFs display tunable photoluminescent properties due to efficient linker‐to‐metal energy transfer promoted by the antenna effect, resulting in a series of RE‐MOFs displaying lanthanoid‐based emissions spanning the visible and near‐infrared regions of the electromagnetic spectrum.
Influence of RED‐II Calculation Rules on the Carbon Footprint of Methanol E‐Fuel
Authors: Gaikwad Ankur , Maga Daniel , Tesch Johanna , Doye Christian 
Published: August 2024

AbstractThe carbon footprint of methanol from cradle‐to‐grave is evaluated using three process concepts to capture CO2, i.e., one using CO2 from direct air capture (DAC) and the other two utilizing CO2 from a steel mill's blast furnace gas (BFG). Hydrogen is supplied by onsite electrolysis, or from a German offshore wind park, or an Australian solar park with ammonia as hydrogen carrier. The study is of interest to life cycle assessment (LCA) practitioners, policymakers, and industries’ management who are involved in regulating, planning, implementing, and operating projects which aim to produce fuels using hydrogen from electrolysis (so‐called ‘e‐fuels’). The influence of assumptions in the RED‐II delegated act regarding recycled carbon fuels and renewable liquid and gaseous fuels of non‐biological origin on the carbon footprint results is examined. The RED‐II assumption regarding the credits for captured CO2 after 2041 indicate that DAC‐based concepts are advantageous with respect to BFG, although the LCA results indicate the opposite. Using green hydrogen from nearby locations reduces carbon footprints more than faraway locations due to transport‐related emissions.
Efficacy of Xenogeneic Collagen Matrices in Augmenting Peri‐Implant Soft Tissue: A Systematic Review and Meta‐Analysis
Authors: Dadlani Shashi , Joseph Betsy , Anil Sukumaran 
Published: August 2024

ABSTRACTBackgroundXenogenic collagen matrices (XCMs) are gaining popularity for soft tissue augmentation in dental implants; yet, gaps exist in our understanding of their comparative effectiveness.ObjectiveThis systematic review and meta‐analysis focuses on studies that utilize soft tissue augmentation techniques for dental implants to improve keratinized mucosa width (KMW), soft tissue thickness (STT), and soft tissue volume (STV). We compared porcine collagen matrices with autogenous grafts when no bone grafts were utilized.Materials and MethodsWe searched databases such as PubMed, Scopus, and the Cochrane Central Register of Controlled Trials for randomized controlled trials and controlled clinical trials published between January 2013 and July 2023 that assessed the efficacy of XCM in peri‐implant soft tissue augmentation. The primary outcome included KMW changes while the secondary outcome was STT/STV changes. Statistical analyses were conducted using a random‐ or fixed‐effects model, and heterogeneity was assessed using I2 statistics.ResultsNine studies were included in the qualitative analysis, and six were included in the meta‐analysis. No significant intergroup differences were observed (p > 0.05), but a significant difference was observed in favor of KMW ≥ 2 mm. Heterogeneity among the studies varied at the 6‐ and 12‐month follow‐ups, with I2 values of 78% and 0%, respectively. The pooled mean difference between the XCM and autograft groups was −0.96 (−1.71 to −0.21), which shows that there was a larger increase in KMW in the autograft group compared with the XCM group (p < 0.05).ConclusionsCollagen matrices are less effective than autogenous grafts at increasing keratinized tissue and STT/STV, but the two techniques yield comparable aesthetic outcomes. Additional studies are necessary to better guide clinical practice and improve patient outcomes.
Low Salivary IgA Levels Against PAc (361–386) as a Risk Factor for Root Caries in Older Adults
Authors: Ichikawa Yu , Kaneko Noboru , Thwin Kaung Myat , Senpuku Hidenobu , Nohno Kaname , Ogawa Hiroshi 
Published: August 2024

ABSTRACTObjectivesThis study aimed to assess the intricate relationship between salivary IgA antibody levels to PAc (361–386) (PPA), mutans streptococci colonization, and root caries development in older adults.Materials and MethodsThis study included 307 participants aged 76 years residing in Niigata city, Japan. Clinical oral examinations were performed at baseline in 2004 and 1 year later, during which the total number of untreated and treated root caries was assessed using the root decayed, filled tooth (DFT) index. The stimulated saliva samples were collected using the spitting method during the baseline survey. Salivary IgA antibody levels to amino acid residues 361–386 of Streptococcus mutans PAc were quantified using an enzyme‐linked immunosorbent assay. Statistical analyses, including the χ2 test, Mann–Whitney U test, and logistic regressions, were performed to examine the association of increased root DFT with the independent variables.ResultsAmong the 307 participants (53.1% men), the mean root DFT at baseline was 3.77 ± 3.66, and 36.5% of the study sample exhibited increased root DFT after 1 year with a mean increment of 0.36 ± 0.48. Participants with increase in root DFT after 1 year had significantly higher rates of low PPA levels (≤ 25th percentile) than those without increased root DFT (p = 0.020). Low PPA levels (≤ 25th percentile) were significantly more likely to have an increased risk of root caries development compared with PPA levels > 25th percentile (adjusted OR: 1.88, 95% CI: 1.09–3.25).ConclusionLow PPA levels and root caries incidence correlated significantly, suggesting that low levels of salivary IgA antibody to PAc (361–386) may serve as a risk factor for increased root caries in older adults.
Induced Periodontitis in Rats With Three Ligature Types: An Exploratory Study
Authors: Chatzaki Natalia , Stavropoulos Andreas , Denes Balazs , Cancela José , Kiliaridis Stavros , Giannopoulou Catherine 
Published: August 2024

ABSTRACTBackgroundThe placement of ligatures in the cervical area of rat molars is considered as a predictable model to induce periodontitis.ObjectivesThe present explorative study aimed to compare the efficacy of metal wires (MWs), without or with sandblasting, versus silk ligatures (SLs) in inducing periodontal bone loss in rats.Materials and MethodsTwenty‐four Wistar rats were randomly divided into three groups of eight rats that received three different types of ligatures (MW, sandblasted wire [SMW], and SL) around their first right mandibular molar, while the contralateral tooth was left without the ligature and served as a control. Bone loss was assessed by measuring the distance from the cementoenamel junction (CEJ) to the bone crest at the distal aspect of the first molar on central mesiodistal sections generated from micro‐CT scans taken 24 and 35 days after ligature placement.ResultsIn the SL group, only in two rats the ligatures were retained until the end of the 24‐day period; in all other animals, the ligatures were lost at some time point. In the SMW, the ligatures were retained only for the 24‐day period. In the MW group, no ligatures were lost. Irrespective of the group or experimental period, the difference in the crestal bone level between ligated and control teeth was in most cases z < 0.20 mm, that is, in 19 out of 25 pairs of teeth. In a few cases, the bone crest was more apically located at the control teeth compared to the ligated ones (four cases each, during both 24‐ and 35‐day experimental periods).ConclusionsBone loss was minimal during the experimental period, with no significant differences between the test and control teeth, or among the three types of ligatures. MWs, not even roughened, do not seem to be a better alternative to SLs for inducing bone loss in the experimental periodontitis model in the rat. This assumption, however, has to be confirmed in a larger, well‐powered study.
Comparison of population photosynthesis characteristics and grain yield of wheat under various sowing dates and seeding rates
Authors: Liu Ying , Cai Wei , Zhu Kuanyu , Xu Yunji , Wang Weilu , Zhang Hao , Gu Junfei , Wang Zhiqin , Liu Lijun , Zhang Jianhua , Zhang Weiyang , Yang Jianchang 
Published: August 2024

AbstractThis study investigated the effects of sowing dates and seeding rates on photosynthetic characteristics and grain yield in wheat (Triticum aestivum L.). A field experiment was conducted with three sowing dates—early sowing date (SD‐E), normal sowing date (SD‐N), and delay sowing date (SD‐D)—and three seeding rates—90 low seeding rate (SR‐L), 108 moderate seeding rate (SR‐M), and high seeding rate 126 kg ha−1 (SR‐H). The results revealed that the grain yield at SR‐L in the SD‐E regime, SR‐M in the SD‐N regime, and SR‐H in the SD‐D regime was increased by 7.48%–9.93%, 14.1%–16.7%, and 19.0%–41.6%, respectively, compared to other combinations under the same sowing date. Consistent with the yield performance, the aboveground biomass accumulation, nonstructural carbohydrates (NSC) accumulation in stems, and NSC remobilization amount from anthesis to maturity were the highest at SR‐L in the SD‐E, at SR‐M in the SD‐N, or at SR‐H in the SD‐D regime, among other treatment combinations. Improved canopy photosynthetic characteristics (i.e., leaf area index, leaf photosynthetic rate, canopy photosynthetically active radiation interception rate, and radiation use efficiency) were also observed at the SR‐M in the SD‐N or at SR‐H in the SD‐D regime. Collectively, a suitable sowing date combined with an optimum seeding rate could enhance grain yield, and increasing the seeding rate could mitigate the yield loss when sowing was delayed by optimizing traits photosynthesis in wheat.
Bilateral rectangular shape dielectric resonator antenna coupled with offset microstrip lines for wideband circular polarization
Authors: Sani Md. Muzammil , Chowdhury Rakesh , Chaudhary Raghvendra Kumar 
Published: August 2024

SummaryIn this work, an offset microstrip line coupled bilateral rectangular‐shaped dielectric resonator antenna (RDRA) is designed for broadband circular polarization (CP), which is fabricated and experimentally verified. The vertical microstrip is added in an offset position to generate orthogonal modes and the fundamental modes TEx111 and TEy111. The generation of orthogonal modes designates the antenna structure as a CP antenna with orthogonal modes. Moreover, the location of the microstrip feed arrangement is used to control the polarization state in the proposed work. In the proposed design, the simulated and hand‐measured input impedance bandwidth(|S11| ≤ −10 dB) obtained is 32.6% (3.53–4.9 GHz) and 33.2% (3.56–4.98 GHz), respectively, whereas the simulated and measured axial ratio (AR ≤ 3 dB) shows 16.1% (3.71–4.36 GHz) and 17.03% (3.7–4.39 GHz) of axial ratio bandwidth, respectively. This design shows a consistent radiation pattern and good average gain, with acceptable agreement between simulation and hand‐measured results. The simulated result shows 94% radiation efficiency in the working frequency range.