Article
Chemistry, Analytical
Jaromir Vyhnanovsky, Dilek Yildiz, Barbora Stadlerova, Stanislav Musil
Summary: The study achieved photochemical vapor generation of bismuth with optimal conditions determined through investigating the influence of sensitizers and reaction medium flow rate. Combining PVG with atomic fluorescence spectrometry can provide low limits of detection at a low operation cost.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Analytical
Yongchun Liu, Jie Zou, Bin Luo, Hairong Yu, Zhigang Zhao, Hui Xia
Summary: Using natural plant extracts as auxiliary matrix or photocatalysts can enhance the efficiency and sensitivity of photochemical vapor generation atomic fluorescence spectrometry for trace mercury determination, while reducing biological toxicity and secondary pollution. This green and sensitive method provides an experimental basis for expanding the photochemical vapor generation system.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Analytical
Lanlan Li, Qirui Huang, Jing Xiao, Jiamin Feng, Shu Zhang, Hong Luo, Zhirong Zou, Xiaoli Xiong
Summary: In this study, Fe3O4 served as both an adsorbent and photocatalyst in the photochemical vapor generation-atomic fluorescence spectrometry (PVG-AFS) determination of Bi(III) after preconcentration. The effects of formic and acetic acid concentration, UV irradiation time, Fe3O4 concentration, and interferences from co-existing ions were investigated. Results showed that the AFS intensity was slightly enhanced by the mixed acid solution, but a significant enhancement was observed when Fe3O4 was used as a photocatalyst. Fe3O4 can decompose in the mixed acid solution, generating Fe3+ which acts as a sensitizer for improving Bi(III) efficiency. Under optimized conditions, the LOD of the proposed PVG-AFS system with or without preconcentration (5 mL sample) were 0.44 ng/mL and 0.07 ng/mL, respectively. The PVG-AFS system was successfully applied to the determination of water samples and demonstrated good accuracy and applicability with recoveries ranging from 94% to 104%.
MICROCHEMICAL JOURNAL
(2022)
Article
Chemistry, Analytical
Yubin Su, Yao Lin, Rui Yang, Liangbo He, Jiahui Yang, Xiaoming Jiang, Chengbin Zheng
Summary: A versatile high-throughput photochemical reactor was developed for the rapid and sensitive determination of mercury, nickel, and selenium. By coupling photochemical vapor generation (PVG) to atomic fluorescence spectrometry (AFS) or point discharge optical emission spectrometry (μPD-OES), the reactor achieved high throughput, high sensitivity, and eliminated interference from transition metal ions. The practicality of the reactor was demonstrated through successful detection in various certified reference materials.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Yuheng Lu, Chenghui Li, Yunfei Tian, Jing Hu, Xiandeng Hou
Summary: The highly sensitive detection of trace tellurium (Te(IV)) in real samples with complicated matrix was achieved by using a new method based on photochemical vapor generation-atomic fluorescence spectrometry (PVG-AFS) and Co-MOF-74 as an adsorbent and Co2+ ion sensitizer. The synthesized Co-MOF-74 showed excellent adsorption capability for Te(IV) within a short time. After conversion to volatile compounds under UV irradiation, the Te(IV) was detected by AFS. The proposed method exhibited a limit of detection of 0.08 ng/mL for Te(IV) after a 50-fold preconcentration and was successfully applied to the analysis of various natural water samples with satisfactory spike recoveries.
ANALYTICA CHIMICA ACTA
(2023)
Article
Chemistry, Analytical
Wen Zeng, Zenghui Hu, Jin Luo, Xiandeng Hou, Xiaoming Jiang
Summary: The method proposed a highly sensitive determination of trace antimony using cobalt ion enhanced PCVG for sample introduction into AFS or ICP-MS. By optimizing the experimental conditions, including enhancement ions, acid medium, UV irradiation, working gas, and potential interference, the method achieved low detection limits and satisfactory recoveries in the analysis of real water samples.
ANALYTICA CHIMICA ACTA
(2022)
Article
Plant Sciences
Anamika Mishra, Kumud Bandhu Mishra, Katerina Sura, Barbora Vesela, Karel Klem, Otmar Urban
Summary: Cold acclimation is a natural strategy for increasing plant survival at sub-zero temperatures. However, the regulation of non-photochemical quenching processes during cold acclimation is still unclear.
ENVIRONMENTAL AND EXPERIMENTAL BOTANY
(2023)
Article
Biochemistry & Molecular Biology
Maria Luisa Astolfi, Marcelo Enrique Conti, Martina Ristorini, Maria Agostina Frezzini, Marco Papi, Lorenzo Massimi, Silvia Canepari
Summary: Bees and their products are useful bioindicators of anthropogenic activities and can help overcome the limitations of air quality networks. This study developed a simple analytical method to determine mercury content in bees and beehive products, and evaluated its performance on real samples collected in six areas of the Lazio region, Italy.
Review
Chemistry, Analytical
Guanghui Niu, Alexander Knodel, Sebastian Burhenn, Sebastian Brandt, Joachim Franzke
Summary: The development of miniature, sensitive, high throughput, and in-situ analytical instruments using dielectric barrier discharge (DBD) has become a hot topic in modern analytical chemistry. DBD offers advantages such as easy operation, simple configuration, ambient working temperature and pressure, low power consumption, and miniature dimension. Its applications in analytical atomic spectrometry include serving as excitation or atomization sources in AES, AAS, and AFS, as well as functioning as a vapor generation system.
ANALYTICA CHIMICA ACTA
(2021)
Article
Chemistry, Physical
Zubair Anwar, Syed Abid Ali, Muhammad Raza Shah, Farid Ahmed, Ayaz Ahmed, Umar Ijaz, Hafsa Afzal, Sofia Ahmed, Muhammad Ali Sheraz, Muneeba Usmani, Iqbal Ahmad
Summary: Riboflavin conjugated silver nanoparticles (RF-AgNPs) were synthesized and characterized. The RF-AgNPs exhibited a surface plasmon resonance (SPR) peak at 422 nm and an intense absorption peak at 2920 cm(-1). AFM studies showed that the RF-AgNPs were spherical and polydisperse. The RF-conjugated AgNPs showed no adverse effects on normal and cancerous cells. RF-AgNPs aggregate at acidic pH and their formation follows a biphasic first-order reaction.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Spectroscopy
Lanlan Li, Chenxi Jiang, Jing Xiao, Hong Luo, Shu Zhang, Zhirong Zou, Ke Huang
Summary: Selenium, mercury and arsenic are widely distributed in the environment, and their toxicity depends on their concentration and forms. Accurate monitoring of these elements is necessary. Photochemical vapor generation (PVG) is a promising method for analytical atomic spectrometry, and it has been applied to determine selenium, mercury and arsenic with various separation techniques. This review summarizes the applications of PVG-analytical atomic spectrometry in selenium, mercury and arsenic speciation analysis.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2023)
Article
Engineering, Environmental
R. D'Ambrosio, A. Cintio, A. Lazzeri, G. Annino
Summary: The use of high-quality resonant cavities in microwave-assisted reactors is desirable for high energy efficiency. A general design method has been proposed to achieve defined mode density and high microwave power dissipation in the sample, with the most efficient heating mode determined through rigorous numerical analysis.
CHEMICAL ENGINEERING JOURNAL
(2021)
Review
Instruments & Instrumentation
Yafei Zhen, Hanjiao Chen, Meng Zhang, Jing Hu, Xiandeng Hou
Summary: The study presents a method for enhancing the sensitive determination of rhenium by improving PVG efficiency using Cd2+ and Co2+, leading to a lower LOD under specific conditions.
APPLIED SPECTROSCOPY REVIEWS
(2022)
Article
Engineering, Environmental
Xinwei Bai, Pranjali D. Muley, Terence Musho, Victor Abdelsayed, Brandon Robinson, Ashley Caiola, Dushyant Shekhawat, Changle Jiang, Jianli Hu
Summary: The challenges in direct methane conversion to higher-value chemicals include catalyst deactivation and low single-pass conversion. In this paper, microwave irradiation was integrated with heterogeneous catalysis to enable higher methane conversion at lower temperatures. The results showed that microwave irradiation facilitated the catalysis process thermally and non-thermally, leading to improved methane conversion. Finite-element modeling was used to explain the non-thermal effects of microwave-assisted catalytic reactions.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Analytical
Haiyan Yang, Kejun Li, Yanping Wang, Xin Yuan, Mei Zhang
Summary: A simple and label-free method was developed for hydrogen peroxide (H2O2) assay by chemical vapor generation-atomic fluorescence spectrometry. The method is based on the inhibition of the atomic fluorescence signal of As(III) by L-Cysteine (L-Cys) and the oxidation of L-Cys to cystine by H2O2 and I-. The proposed method has the advantages of simplicity and cost-effectiveness.
MICROCHEMICAL JOURNAL
(2022)
Article
Biochemical Research Methods
Laura Colombaioni, Beatrice Campanella, Riccardo Nieri, Massimo Onor, Edoardo Benedetti, Emilia Bramanti
Summary: Mitochondria, organelles of bacterial origin, are not only responsible for energy production but also generate reactive oxygen species. They play a key role in cell defense regulation, cell stress, and damage. This study investigated the effect of hyperglycemia on the metabolome of hippocampal neurons and found that neuronal metabolism was impaired and typical fermentative compounds were produced.
ANALYTICAL BIOCHEMISTRY
(2022)
Article
Medicine, General & Internal
Edoardo Benedetti, Fabrizio Mavilia, Claudia Barate, Emilia Bramanti, Riccardo Morganti, Giulia Cervetti, Enrico Capochiani, Benedetto Bruno, Matteo Pelosini, Salvatore Massimo Stella, Sara Galimberti
Summary: This study suggests that ultrasound is a reliable, radiation-free tool for assessing superficial lymphnodes and splenic involvement in CLL patients.
JOURNAL OF CLINICAL MEDICINE
(2022)
Article
Thermodynamics
Stefano De Antonellis, Emilia Bramanti, Luigi Calabrese, Beatrice Campanella, Angelo Freni
Summary: This paper introduces a novel silica gel-based desiccant compound that can be used to prepare various products, with suitable adsorption capacity, good mechanical properties, and stability. The small-scale prototype testing shows that the desiccant material performs well under typical operating conditions of air dehumidification processes.
APPLIED THERMAL ENGINEERING
(2022)
Article
Biochemistry & Molecular Biology
Francesca Cicogna, Emilia Bramanti, Beatrice Campanella, Stefano Caporali, Luca Panariello, Caterina Cristallini, Randa Ishak, Niccoletta Barbani, Elisa Passaglia, Serena Coiai
Summary: Cold plasma with oxygen was used for surface functionalization of non-woven polypropylene-based fabric (NWF-PP) directly cut from face masks to improve its capability to retain active biomolecules such as polyphenols. The nature and degree of functionalization were evaluated by ATR-FTIR and XPS while the effects on mechanical and morphological characteristics were assessed by stress-strain measurements and SEM analysis. The functionalized NWF-PP demonstrated the ability to firmly anchor polyphenols extracted from cloves, protecting the treated surfaces against thermo-oxidation even after prolonged extraction.
Article
Food Science & Technology
Teresa Grande, Aymen Souid, Marco Ciardi, Clara Maria Della Croce, Stefania Frassinetti, Emilia Bramanti, Vincenzo Longo, Luisa Pozzo
Summary: This study investigated the phenolic compounds, antioxidant activities, antimicrobial activity, and effect on Lactobacillus brevis growth of eight whole flours obtained from four ancient and modern wheat genotypes of Italian Triticum genus. The results showed quantitative differences in antioxidant activities, total phenolic content, and concentrations of five phenolic acids among the wheat genotypes. Wheat extracts had significant inhibitory effects on pathogenic bacteria and promoted the growth of L. brevis. The phenolic profile and antioxidant activities were influenced by the genotypic characteristics of the studied varieties, with the ancient Saragolla wheat standing out for its interesting phenolic profile.
EUROPEAN FOOD RESEARCH AND TECHNOLOGY
(2023)
Article
Agricultural Engineering
Jose Gonzalez-Rivera, Beatrice Campanella, Elena Pulidori, Emilia Bramanti, Maria Rosaria Tine, Luca Bernazzani, Massimo Onor, Paolo Barberi, Celia Duce, Carlo Ferrari
Summary: Novel green extraction method (US-IMWAE) using simultaneous ultrasound and microwave irradiation allows for full exploitation of aromatic herbs while minimizing energy consumption and extraction cost. This method has successfully yielded essential oils with appealing composition profiles for cosmetic and medical industries, as well as valuable solid residues for alternative fuel production.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Chemistry, Physical
Elena Pulidori, Simone Micalizzi, Nikos Koutsomarkos, Emilia Bramanti, Maria Rosaria Tine, Giovanni Vozzi, Carmelo De Maria, Maria Chatzinikolaidou, Celia Duce
Summary: This study investigates the structure and correlations between structure, mechanical, and biological properties of gelatin-based materials. Gelatin electro-spun materials have higher content of ordered structure compared to gelatin casted films, which may be attributed to the random coil - alpha-helix transition during electrospinning. The presence of cross linker (GPTMS) decreases the ordered structures in gelatin casted films, while it does not affect the percentage of ordered structure in electrospun samples. The presence of keratin in gelatin/keratin electrospun biomaterials decreases alpha-helix content and promotes the conversion from antiparallel to parallel beta-sheet.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Multidisciplinary Sciences
Ophelie Ranquet, Celia Duce, Emilia Bramanti, Patrick Dietemann, Ilaria Bonaduce, Norbert Willenbacher
Summary: The authors use a combination of egg yolk and two pigments to investigate how different distribution of proteinaceous binder can control the flow behavior, drying kinetics, and chemistry of oil paints. This study demonstrates that adjusting the distribution of proteinaceous binder can enhance the stiffening effect and prevent undesired absorption of humidity, improving the brushability and preserving invaluable artworks.
NATURE COMMUNICATIONS
(2023)
Article
Medicine, General & Internal
Edoardo Benedetti, Claudia Barate, Fabrizio Mavilia, Emilia Bramanti, Riccardo Morganti, Valentina Guerri, Giulia Cervetti, Enrico Capochiani, Ilaria Bertaggia, Salvatore Massimo Stella, Ginevra Traverso, Benedetto Bruno, Sara Galimberti
Summary: Fixed duration VenR treatment showed significant improvements in PFS and uMRD compared to bendamustine-rituximab in relapsed/refractory CLL patients. Ultrasonography and palpation were suggested as possible techniques to evaluate visceral and superficial lymph node involvement outside of clinical trials.
JOURNAL OF CLINICAL MEDICINE
(2023)
Article
Biochemistry & Molecular Biology
Beatrice Campanella, Stefano Legnaioli, Massimo Onor, Edoardo Benedetti, Emilia Bramanti
Summary: Saliva is a sample that can be easily collected and contains a wealth of biochemical information related to an individual's health status. The fast and straightforward analysis of saliva using vibrational spectroscopy provides a good basis for large-scale preclinical studies. This study explored the effects of saliva collection (spitting/swab) and processing (deproteinization procedures) and found that special care is needed when using swabs due to the significant interaction between the polymeric material and saliva components. Additionally, analyzing saliva before and after deproteinization by FTIR and Raman spectroscopy provides complementary biological information.
Article
Chemistry, Analytical
Emanuela Pitzalis, Beatrice Campanella, Rachele Bonini, Massimo Onor, Alessandro D'Ulivo
Summary: The mechanisms controlling the generation of PbH4 in the reaction of Pb(II) with NaBH4 were investigated, with and without the presence of K3Fe(CN)6. PbH4 was identified for the first time using gas chromatographic mass spectrometry. It was found that without the additive, Pb(II) is converted to solid species and no volatile lead species can be detected. In the presence of K3Fe(CN)6, PbH4 is formed by the direct transfer of hydride from borane to lead atoms.
ANALYTICA CHIMICA ACTA
(2023)
Article
Chemistry, Analytical
Michelle Buoso, Beatrice Campanella, Massimo Onor, Emanuela Pitzalis, Alessandro D'Ulivo
Summary: The use of BH intermediates as derivatization reagents significantly improves the tolerance to interference from transition metal ions in the generation of SbH3 and BiH3, and shows high tolerance in a wide range of acidity. The method has been successfully applied to the determination of Sb and Bi in complex samples, providing further understanding of the chemical behavior of borohydrides.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2024)
