bluuebunny/crossref_metadata_2025_split huggingface dataset:
Tungsten oxide‐iodide/poly‐2‐aminobenzenethiol nanocomposite with iodine intercalation as a promising electrode for potentiometric sensing of Pb2+ ions in water
Authors: Alnuwaiser Maha Abdallah , Rabia Mohamed 
Published: July 2024

AbstractTungsten oxide‐iodide/poly‐2‐aminobenzenethiol nanocomposite (WO2I2/P2ABT) is created through the introduction of iodine into polymer chains, where iodine serves as an oxidizing agent during the synthesis process. With a highly porous structure, the sensing capabilities of WO2I2/P2ABT for detecting Pb2+ ions are successfully demonstrated, revealing a Nernstian slope of 26.2 mV/decade. This detection is accomplished through a simple potentiometric technique, employing a simple two‐electrode cell setup. To further validate its performance, cyclic voltammetry is conducted using a three‐electrode system, revealing a remarkable sensitivity of 7.2 × 10−5 A M−1 for Pb2+ ions. The nanocomposite sensor's selectivity is rigorously examined by subjecting it to testing in the presence of 0.01 M interfering ions. The results unequivocally demonstrate that the sensor remains unresponsive to these interfering ions, underscoring its remarkable selectivity for Pb2+ ions. Moreover, the sensor's behavior is evaluated under real‐world conditions using natural samples, where, no indications of interference from other ions are observed. This is estimated by the absence of cyclic peaks in the voltammogram, indicating the sensor's unique ability to selectively detect Pb2+ ions without being perturbed by other ions that may be naturally occurring in the samples. These findings emphasize the nanocomposite sensor's potential for a wide array of applications in environmental monitoring and analytical chemistry. Its extraordinary combination of high sensitivity, impeccable selectivity, and robust performance in practical scenarios establishes it as an invaluable tool for detecting Pb2+ ions across various contexts.
Effect of fertilizers on yield, phytochemical, and antioxidant properties of Cucurbita moschata fruits
Authors: Vanessa Boudjeka Guemkam , Alice Tchiazé Ifoué , William Djeukeu Asongni , Adelaide Demasse Mawamba , Gisèle Loé‐Etame , Condurache Nina‐Nicoleta , Milea Ștefania‐Adelina , Cotarlet Mihaela , Fabrice Dongho Dongmo , Inocent Gouado , Iordachescu Gabriela 
Published: July 2024

AbstractThe nutritional and functional properties of squashes are influenced by various factors, such as the stage of plant development, soil composition, and type of fertilizer. This study evaluates the impact of various organic fertilizers on Cucurbita moschata D. properties. For this purpose, squashes were fertilized using Ash at 10 kg/25 m2, bovine compost at 62.5 kg/25 m2, and a 1:1 mixture of ash and bovine compost. Negative control (without fertilizers) and positive control (NPK 20‐10‐10 at 2 kg/25 m2) were included. Post‐harvest, the yield, carotenoids, phenolic compounds, flavonoids, and antioxidant activities were assessed. Ash fertilizer resulted in the highest number of fruits per plant (2.20 ± 0.16). Regarding flavonoids, the bovine compost yielded the highest level (428.67 ± 2.62 mg/100 g of edible portion). The mixture of ash and bovine compost produced fruits with the highest content of total carotenoids, β‐carotene, lycopene, and total phenolic compounds (249.7 ± 3.68, 219.80 ± 3.41, 26.07 ± 0.41, and 575.00 ± 9.95 mg/100 g of edible portion, respectively). Moreover, carotenoids extracted from this mixture exhibited the highest inhibition of DPPH and ABTS free radicals (30.87 ± 0.65 and 47.32 ± 1.30%, respectively). This research suggests that the use of a mixture of ash and bovine compost could significantly enhance the yield of squashes and their phytochemical and antioxidant potential.
Synthesis and evaluation of Maillard conjugates for encapsulation and controlled delivery of quercetin under simulated gastrointestinal tract conditions
Authors: Cabrera‐Ramírez Angel H. , Manríquez‐Medina Marisol , Romero‐Robles Laura E. , Chavez‐Santoscoy Rocio A. 
Published: July 2024

AbstractEncapsulation of bioactive molecules for therapeutic use is gaining great interest in the scientific community. Several encapsulation methodologies have been evaluated, sacrificing, in some cases, either encapsulation efficiency or compound integrity. Our work developed Maillard conjugates (MCs) based on the whey protein (WP)‐Maltodextrin (MD) interaction to encapsulate quercetin by freeze‐drying. The WP:MD ratio used (1:2 or 1:3) yielded the formation of MCs, demonstrated by an increased browning index and changes in the protein secondary structure. Freeze‐drying showed high encapsulation efficiency, reaching 87.65% and 84.72% in treatments loaded with 3.3 mg quercetin/g MCs. Quercetin‐loaded MCs showed spherical‐shape (4–10 μm) and a negative charge, suggesting colloidal stability. Moreover, in vitro tests demonstrated a sustained release of quercetin throughout the oral, gastric, and intestinal phases, highlighting the MCs efficacy as bioactive delivery systems. This work provides useful information to design bioactive compound delivery systems for food and pharmaceutical applications.
TBM excavation of São Paulo Metro Line 6 South in heterogeneous ground in urban area
Authors: Comulada Marc , Aguiar Gustavo , Vassallo Crisci Mike , Reig Ramos Maria Isabel 
Published: July 2024

AbstractThe São Paulo Metro is expanding its network in the São Paulo Metropolitan Area inhabited by 21 million people. Metro Line 6 connects the north of the city to the existing metro network further South. The construction of Line 6 currently represents the largest infrastructure project in Latin America, combining the excavation of tunnel boring machine (TBM) and conventional tunnels, cut‐and‐cover stations and a number of deep emergency exit shafts. This paper presents the main features of the TBM tunnel excavated in the South stretch through the Tertiary soils of the São Paulo Basin and through the challenging Embu Complex, which consists of a mixture of fractured rock, saprolite and residual soils. The alignment runs under the dense urban grid of São Paulo under high‐rise buildings and other infrastructure, such as existing Metro lines.
Efficacy of trametinib in a metastatic urothelial carcinoma patient with a BRAF mutation
Authors: Karasawa Hiroyuki , Yasumizu Yota , Kosaka Takeo , Shimoi Tatsunori , Oya Mototsugu 
Published: July 2024

IntroductionBRAF mutations in bladder cancer are rare. MEK inhibitors have excellent clinical benefits in the treatment of melanoma.Case presentationA 60‐year‐old male was diagnosed with muscle‐invasive bladder cancer and underwent total cystectomy and ileal conduit diversion. Despite 4 cycles of gemcitabine and cisplatin chemotherapy and 3 courses of pembrolizumab, the left obturator lymph node enlarged. Cancer multi‐gene panel testing confirmed the BRAF G469A mutation and trametinib was recommended. Three months after the initiation of trametinib (2 mg, qd), the left obturator lymph node shrank by more than 50%. The disease has remained stable for more than 18 months.ConclusionThe present case indicates the potential of trametinib to treat mBUC patients with the BRAF G469A mutation in this setting.
Investigation of the relationship between the sense of coherence and the level of depression in mothers of children with autism
Authors: Durankuş Ferit , Erdoğan Fırat , Durankuş Ramazan , Gulek Ayse , Bas Raif Kaan , Albayrak Yakup , Yilmaz Kübra 
Published: July 2024

AbstractIntroductionAutism spectrum disorder (ASD) is a neurodevelopmental disorder originating from early childhood. Although there are studies investigating the sense of coherence in caregivers of children with ASD, there is not a previous study in our country. In this study, we aimed to examine the relationship between the sense of coherence and depression levels in mothers of children with ASD.MethodSeventy‐five mothers of children followed up in rehabilitation centers with the diagnosis of ASD were included in this study. Beck Depression Inventory (BDI) and Sense of Coherence Scale‐13 (SOC‐13) were administered to mothers. Participants were divided into two groups: a depressive group and a control group according to the BDI cut‐off score. SOC‐13 total score and sub‐scores were compared between these groups.ResultsAccording to the BDI cut‐off score, 45 participants (60%) were included in the depressive group. Total SOC‐13 score and sub‐scores were found to be statistically significantly lower in the depressive group compared with the control group.ConclusionOur study is the first study in our country to examine the relationship between the sense of coherence and depression in mothers of children with ASD. The results showed that there was a significant negative correlation between depression scores and sense of coherence. It is predicted that psychological interventions that will improve the sense of coherence of mothers with children with ASD may play an important role in the treatment of depression, thus leading to an increase in the quality of care provided by parents.
Soil hydro‐physical variables and crop residues determinate runoff, soil loss, and glyphosate and AMPA concentration in the aqueous phase under simulated rainfall events
Authors: Sainz Daiana , Behrends Kraemer Filipe , Carfagno Patricia , Eiza Maximiliano , Chagas Celio 
Published: July 2024

AbstractSoil structural degradation and water erosion processes were observed even in no‐tillage schemes in the Pampas region. Within these conservation systems, agrochemical application per hectare is one of the highest globally. Thus, this entails a serious risk of water contamination. The objectives of this study were to (1) test the hypothesis that the hydrological dynamics and sediment concentration related to surface runoff were conditioned by soil structure regardless of the presence of maize (Zea mays L.) crop residue and (2) assess the incidence of maize crop residue on glyphosate and aminomethylphosphonic acid (AMPA) concentration in runoff. The soil under study corresponded to Arroyo Dulce Series (Typic Argiudoll silty loam soil). Rain simulations were performed in the laboratory on undisturbed soil samples. Total runoff and infiltration rate were similar between treatments with C(+) and without C(−) maize crop residues (C(+) 1381.40 mL and 14.27 mm h−1, C(−): 1529.70 mL and 21.67 mm h−1). The C(−) treatments showed a higher sediment concentration than C(+) (1.58 and 0.42 g 100 mL−1, respectively). Glyphosate and AMPA average values in runoff were 15.9 and 33.9 µg L−1. High variability of the hydro‐physical properties and occurrence of soil structure, particularly platy ones, were detected. The hydrological variables were conditioned mainly by the occurrence of platy structures regardless of crop residue presence. Glyphosate concentration was increased in the first runoff event by the presence of corn residues, while AMPA concentrations were higher in the second runoff event in both residue treatments. In this study, maize residue on the soil surface protected the soil from sediment detachment but did not change runoff or infiltration. Thus, the implementation of agricultural management practices that promote vegetative residue cover has shown positive results to erosion.
Computed tomography findings of 50 patients diagnosed with aspiration pneumonia: A case series
Authors: Ueda Akihito , Nohara Kanji , Fujii Nami , Nakajima Kazuhiro , Miyauchi Yumiko , Inoue Yutaka 
Published: July 2024

AbstractThe effect of neglecting imaging in aspiration pneumonia diagnosis is not well understood. In this study, the computed tomography images of 50 patients diagnosed with aspiration pneumonia were retrospectively analyzed by three radiologists at a different hospital. Among these cases, 32%–42% were not classified as aspiration pneumonia based on imaging. Thus, imaging features may not have been adequately considered for diagnosing aspiration pneumonia. Although not all patients with aspiration pneumonia can be diagnosed based on imaging, aspiration pneumonia should be considered in the diagnosis as cases that are clearly nonaspiration pneumonia can be misdiagnosed as aspiration pneumonia.
A novel approach to detect glucose concentration using active cavity Whispering Gallery Mode sensor
Authors: Et‐Tijani El Metouy , Poffo Luiz , Velly Christelle , Féron Patrice , Abel‐Tiberini Laetitia 
Published: July 2024

AbstractThis paper presents a new approach to particle detection using an active microresonator operating in the transparency regime. Simulations demonstrate that when particles interact with the microresonator surface, they induce optical losses. To compensate for these losses, the optical gain is amplified to restore the transparency regime. Simulation results show a linear relationship between nanoparticle concentration and the pump power required to compensate for optical losses. By the use of microresonator with a very high quality factor, this approach offers an accurate and sensitive method for detecting nanoparticles, without the need for complex equipment.
Adaptive traits of Planctomycetota bacteria to thrive in macroalgal habitats and establish mutually beneficial relationship with macroalgae
Authors: Gao Xueyan , Xiao Yihua , Wang Ziwei , Zhao Hanshuang , Yue Yufei , Nair Shailesh , Zhang Zenghu , Zhang Yongyu 
Published: July 2024

AbstractBacteria and macroalgae share an inseparable relationship, jointly influencing coastal ecosystems. Within macroalgae habitats, Planctomycetota, a group of bacteria notoriously challenging to cultivate, often dominate. However, the mechanisms facilitating their persistence in this environment remain unclear. Here, we successfully isolated a novel Planctomycetota bacterium, Stieleria sp. HD01, from the surface of kelp. We demonstrated that HD01 possesses a robust ability to metabolize fucoidan, which constitutes half of the kelp‐derived organic carbon and exhibits resistance to attack by most microorganisms. Moreover, HD01 can utilize a broad spectrum of other organics, indicating its metabolic versatility and competitive prowess within algal environments. Additionally, HD01 can secrete antagonistic substances against other bacteria, form biofilms, and employ superoxide dismutase and catalase to resist oxidative stress, further consolidating its ecological fitness. Comparative metagenomics analysis suggested that Planctomycetota may have a mutually beneficial relationship with kelp.
Revealing elusive conformations of sucrose from hydrogen bond J‐coupling in H2O: A combined NMR and quantum mechanics study
Authors: Kwon Jeahoo , Reeves Hannah L. , Wang Lee‐Ping , Freedberg Darón I. 
Published: July 2024

AbstractHydrogen bonding is a crucial feature of biomolecules, but its characterization in glycans dissolved in aqueous solutions is challenging due to rapid hydrogen exchange between hydroxyl groups and H2O. In principle, the scalar (J) coupling constant can reveal the relative orientation of the atoms in the molecule. In contrast to J‐coupling through H‐bonds reported in proteins and nucleic acids, research on J‐coupling through H‐bonds in glycans dissolved in water is lacking. Here, we use sucrose as a model system for H‐bonding studies; its structure, which consists of glucose (Glc) and fructose (Frc), is well‐studied, and it is readily available. We apply the in‐phase, antiphase‐HSQC‐TOCSY and quantify previously unreported through H‐bond J‐values for Frc–OH1–Glc–OH2 in H2O. While earlier reports of Brown and Levy indicate this H‐bond as having only a single direction, our reported findings indicate the potential presence of two involving these same atoms, namely, G2OH ➔ F1O and F1OH ➔ G2O (where F and G stand for Frc and Glc, respectively). The calculated density functional theory J‐values for the G2OH ➔ F1O agree with the experimental values. Additionally, we detected four other possible H‐bonds in sucrose, which require different phi, psi (ϕ, ψ) torsion angles. The ϕ, ψ values are consistent with previous predictions of du Penhoat et al. and Venable et al. Our results will provide new insights into the molecular structure of sucrose and its interactions with proteins.
Enhanced electromechanical performance of Nafion actuator doped by poly(ethylene glycol)‐grafted graphene oxide
Authors: Ma Li , Guo Xiaowei , Mei Longxiang , Wang Lehui , Gui Yanghai , Guo Dongjie 
Published: July 2024

AbstractCurrent ionic polymer–metal composite (IPMC) actuators have severe actuation drawbacks (i.e. low force output and poor stability), hampering their applications. To address these issues, poly(ethylene glycol)‐grafted graphene oxide (PEG‐GO) is synthesized and incorporated into a Nafion matrix, thus producing a PEG‐GO hybrid Nafion film with better physiochemical properties for fabricating a high‐performance, low‐cost IPMC actuator. The modification of PEG to GO not only prevents GO agglomeration and sedimentation, but also avoids loss of PEG in water. Driven by a 0.2 Hz, 2.5 V electric field, the hybrid IPMC actuator exhibits superior electromechanical behaviors, i.e. a swing angle of 110.3°, a blocking force of 6.89 mN and a stable working time of 485 s, respectively increasing by 92%, 209% and 294% when compared to a pure Nafion actuator. © 2024 Society of Chemical Industry.
Perceptions of medical doctors and patients about imaging for people with low back pain: A qualitative study
Authors: Barbosa Mariana M. , dos Santos Anna Julia M. , Galli Nilva , Vidal Rubens V. C. , Grande Guilherme H. D. , Oliveira Crystian B. 
Published: July 2024

AbstractBackgroundLow‐value care is the use of substitutive/ineffective/harmful strategies based on available evidence, and it is considered one of the main contributors to the burden related to low back pain in health care systems. The use of routine imaging for patients with low back pain is the main example of inappropriate care. Therefore, understanding the perceptions of medical doctors and patients from Brazil about this practice may help propose strategies to reduce imaging rates.ObjectiveTo investigate the perceptions of medical doctors and patients about imaging for the diagnosis of nonspecific low back pain.DesignA qualitative study using the framework analysis method.SettingsPrimary and secondary care.ParticipantsFifteen patients with low back pain and 15 doctors participated in this study.Data CollectionSociodemographic data were collected from all participants, and the interviews were performed using a set of questions created based on the literature.Main ResultsPatients and doctors believe that the main reason for ordering imaging tests is to identify the source of pain, and imaging could be useful for tracking disease progression over time or if there is a lack of improvement after treatment. Patients' expectations and pressures play a role in the decision to order imaging tests, but clinicians believe that education is the preferred strategy to reduce imaging rates.ConclusionIdentifying the source of pain, tracking the disease progression, and patients' expectations and pressures were the main drivers of imaging requests for low back pain. Educational strategies were suggested to reduce the use of routine imaging.
In Situ Sulfonated Mesoporous Polydivinylbenzene as a Solid Acid Catalyzed the Condensation of Phenol and Acetone
Authors: Wei Ning , Wang Qingyin , Guo Li , Wang Danjun , Chen Tong , Wang Gongying 
Published: July 2024

AbstractSulfonated mesoporous polydivinylbenzene solid acid was prepared by in situ sulfonation method, and the physical chemical properties of this solid acid was characterized by XRD, BET, FT‐IR, etc. Acid density of sulfonated mesoporous polydivinylbenzene was characterized by acid base titration, and the result showed that the acid density was 1.58 mmol H+/g. The condensation of phenol and acetone was used as a probe reaction to investigate the catalytic performance of sulfonated mesoporous polydivinylbenzene as a solid acid. Results showed that the phenol conversion rate could approach theoretical conversion rate with Bisphenol‐A selectivity of 91 % at 90 °C. More importantly, sulfonated mesoporous polydivinylbenzene had good stability, and after repeated use for five times, the catalytic performance was not significantly reduced.
Micellization Behavior and Thermodynamic Characteristics of Saponin and SDS: The Impact of Silica Nanoparticles for Subsurface Formation Interaction Studies
Authors: Muneer Rizwan , Alimkulov Rustam , Eghtesadi Neda , Ormantayeva Anar , Thanh Pham Tri , Abbas Azza Hashim 
Published: July 2024

AbstractThis study investigates the temperature‐dependent micellization behaviors of saponin and sodium dodecyl sulfate (SDS) surfactants, which are both important for chemical enhanced oil recovery (CEOR). It also evaluates the effect of silica nanoparticles (SiO2) on these behaviors, given the growing interest in nanoparticle‐enhanced surfactants. The research focuses on the tunable properties of nanoparticle‐surfactant combinations. The structural differences between saponin and SDS were identified using FT‐IR and H‐NMR. The Du Noüy ring method was used to measure surface tension at various concentrations and temperatures (25–75 °C). FTIR analysis showed distinct differences between SDS and Saponin, associated with head group where there is hydroxyl groups in SDS solution. H‐NMR showed higher complexity of Saponin's structure, evidenced by its diverse sugar‐related proton peaks. Both SDS and Saponin reduce surface tension with temperature; SDS is more effective, lowering it to 42.1 mN/m versus 48.5 mN/m for Saponin. With SiO2, tensions drop to 39.2 mN/m for SDS and 45.5 mN/m for Saponin. Both surfactants maintain CMCs under reservoir temperature in the 0.05–0.1 wt % range. Saponin exhibited a more negative ΔG° and consistently negative ΔH°, indicating a thermodynamically favorable exothermic reaction. The novelty of this study lies in its focus on both anionic and nonionic surfactants under simulated reservoir conditions. The study focuses on the role of nanoparticles in enhancing surfactant stability and efficiency by addressing thermodynamic parameters.
Recent Progress in Solketal Synthesis from Glycerol and Acetone
Authors: Wang Lumei , Du Xiao , Zhang Dian , Hu Tiantian , Ren Dezhang , Huo Zhibao 
Published: July 2024

AbstractThe extensive use of biodiesel leads to the excess of glycerol as a by‐product. But as a carbon resource, it has been increasingly used in organic synthesis of high value‐added derivatives in recent years. Among them, solketal is one of the most important derivatives of glycerol, which is generated by the reaction of glycerol and acetone. Based on a large number of relevant literatures, this paper systematically summarized the relevant researches in recent ten years. We systematically summary the latest research progress on the synthesis of solketal by glycerol and acetone. We have focused on a systematic study of four different reaction mechanisms for the ketonation reaction of glycerol and acetone. And the types of catalysts were classified into two categories, homogeneous catalysts and non‐homogeneous catalysts, and the non‐homogeneous catalysts were further classified in more details for the study. This review provides a more comprehensive reference for the ketal reaction of glycerol and acetone, and develops some new ideas for the transformation.