Article
Chemistry, Applied
Rui Sun, Pengchao Qiao, Zhe Wang, Wei Wang
Summary: This study demonstrates the preparation of monodispersed large-pore mesoporous silica nanoparticles using a sulfuric acid assisted hydrothermal process, enabling precise control over drug loading and release performance with high surface area and large mesopore structures.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Agricultural Engineering
Jianming Guo, Jing Li, Dylan Liu, Yong Xu
Summary: Lignocellulosic biomass, consisting of hemicellulose, lignin, and cellulose, has different effects on the enzymatic digestibility of cellulose. This study successfully overcame the key obstacles to the enzymatic digestibility of poplar cellulose by utilizing three different technologies, resulting in the conversion of cellulose to glucose.
BIORESOURCE TECHNOLOGY
(2024)
Review
Chemistry, Physical
Fatemeh Boshagh
Summary: The study reviews various methods of carbohydrates determination in the dark fermentative hydrogen production process, emphasizing the need for accurate, inexpensive, safe, and user-friendly measuring methods. It highlights the advantages and shortcomings of different techniques and their application in dark fermentative hydrogen production.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Haidong Li, Shuofan Li, Jianxun Wu, Lingyuan Xie, Yongmei Liang, Yahe Zhang, Suoqi Zhao, Chunming Xu, Quan Shi
Summary: This study presents a novel approach for the molecular characterization of aromatics in petroleum fractions. The method showed good selectivity and sensitivity for aromatic hydrocarbons and enables a semiquantitative analysis. It can also distinguish compounds with the same molecular composition.
Article
Biochemistry & Molecular Biology
Sodeeq Aderotimi Salami, Meloddy Manyeruke, Xavier Siwe-Noundou, Rui Werner Macedo Krause
Summary: The application of immobilized sulfuric acid on silica gel as a solid catalyst in the synthesis of novel alpha-acyloxycarboxamide derivatives via a Passerini reaction was explored. The process showed advantages such as short reaction time, high yields, low cost, and catalyst reusability.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Energy & Fuels
Yuzhong Li, Wujun Zuo, Yupeng Feng, Hongwei Zhang, Yong Dong
Summary: The study found that in wet flue gas desulfurization systems, H2SO4 exists in both gaseous and aerosol forms at the inlet, and undergoes transformation in the scrubber. The amount of H2SO4 in aerosol form increased while the vapor form decreased, with demisters being more effective in reducing H2SO4 than droplets.
Article
Chemistry, Multidisciplinary
Ronaldo P. P. Parreno Jr
Summary: This study investigates the effects of sulfonation on microstructure and morphology of crosslinked electrospun polybenzoxazine (PBz) fibers by correlating the reaction kinetics with the degree of sulfonation. The kinetics of sulfonation reaction for PBz fibers is an electrophilic-based, first-type substitution mechanism where only one sulfonic acid (-SO3H) group is attached to each repeating unit in the aromatic structure of PBz. Experimental results show that sulfonation leads to an increase in fiber diameter and the presence of defects on fiber surfaces. The electrospun PBz fibers sulfonated for 6 h achieve the highest ion exchange capacity (IEC) value with a degree of sulfonation of 66%.
Article
Multidisciplinary Sciences
Shuai Jiang, Yi-Rong Liu, Teng Huang, Ya-Juan Feng, Chun-Yu Wang, Zhong-Quan Wang, Bin-Jing Ge, Quan-Sheng Liu, Wei-Ran Guang, Wei Huang
Summary: Atmospheric aerosol nucleation contributes significantly to cloud formation, but the mechanisms involved are still not well understood. In this study, a general workflow based on a deep neural network-based force field is proposed to overcome the high computational costs of studying aerosol nucleation. The results highlight the underestimation of acid-base formation rates, especially in polluted environments, suggesting the need for revisiting previous measurements.
NATURE COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Sara Seager, Janusz J. Petkowski, Maxwell D. Seager, John H. Grimes Jr, Zachary Zinsli, Heidi R. Vollmer-Snarr, Mohamed K. Abd El-Rahman, David S. Wishart, Brian L. Lee, Vasuk Gautam, Lauren Herrington, William Bains, Charles Darrow
Summary: The habitability of planets requires exploration beyond our Earth-centric viewpoint. Venus' clouds, composed of concentrated sulfuric acid, were previously thought to be incapable of supporting life. However, recent research demonstrates that key molecules needed for life, such as nucleic acid bases, can be stable in this environment. This finding advances the possibility that the Venus atmosphere may be able to support complex chemicals necessary for life.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Biochemistry & Molecular Biology
Sodeeq Aderotimi Salami, Xavier Siwe-Noundou, Rui W. M. Krause
Summary: In the search for convenient, green, and practical catalytic methods for organic synthesis, a simple and efficient protocol for N-formylation of various amines was developed using immobilized sulfuric acid on silica gel (H2SO4-SiO2). The reaction exhibited short reaction time and high yields, and the catalyst can be recycled.
Article
Chemistry, Physical
Oliver Vogt, Neven Ukrainczyk, Eddie Koenders
Summary: The importance of Si/Al ratio in geopolymer mix designs for acid resistance was demonstrated by modifying a metakaolin-based geopolymer with different percentages of silica fume. Testing showed that above a critical silica fume content, erosion of the sample surface by complete dissolution can be prevented, leading to densification of protective areas of the corroded layer and delaying corrosion progress.
Review
Chemistry, Physical
Shailesh Pathak, Sreedevi Upadhyayula
Summary: This review summarizes the technological challenges faced by the closed-loop thermochemical Iodine-Sulfur (IS) cycle for hydrogen production, focusing on the thermodynamic behavior, acid concentration system, reactor designs, SO2-O2 separation, energy consumption, and materials of construction in the sulfuric acid decomposition step. The study also discusses the current state-of-art and future development directions. Results indicate that accurate thermodynamic properties estimation can be achieved using an electrolyte NRTL model, and the compression-cooling process is a better alternative for separating SO2-O2, although high energy requirement for cooling remains a challenge.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Environmental Sciences
Yishuo Guo, Chao Yan, Chang Li, Wei Ma, Zemin Feng, Ying Zhou, Zhuohui Lin, Lubna Dada, Dominik Stolzenburg, Rujing Yin, Jenni Kontkanen, Kaspar R. Daellenbach, Juha Kangasluoma, Lei Yao, Biwu Chu, Yonghong Wang, Runlong Cai, Federico Bianchi, Yongchun Liu, Markku Kulmala
Summary: Significant nighttime sulfuric acid production was observed in urban Beijing during winter, with concentrations ranging between 1.0 and 3.0 x 10^6 cm(-3). Nighttime sulfuric acid events occurred most frequently on unpolluted nights with low vapor condensation sink, and were strongly correlated with O3, alkenes, and SO2 concentrations under very clean conditions. The concentration of sulfuric acid showed a strong correlation with the number concentration of sub-3 nm particles on both clean and polluted nights.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Ramin Ghiai, Sedigheh Alavinia, Ramin Ghorbani-Vaghei
Summary: In this study, an efficient, economic, sustainable, and green protocol for the multicomponent synthesis of six-membered oxygen- and nitrogen-containing heterocycles was developed. The one-pot reaction using a novel mesoporous bifunctional organocatalyst supported cholorosulfonic acid [poly(triazine-benzene sulfonamide)-SO3H (PTBSA-SO3H)] under ambient conditions showed a wider substrate range and shorter reaction times.
Article
Chemistry, Physical
Yao Yan, Jia Liu, Bing Zhang, Ruohan Xia, Yuqi Zhang, Zisheng Guan
Summary: This work presents a method for preparing a robust antireflective (AR) coating on a polycarbonate (PC) substrate. The coating is prepared by dip-coating a mixed ethanol suspension of tetraethoxysilane (TEOS) base-catalyzed silica nanoparticles (SNs) and acid-catalyzed silica sol (ACSS). The addition of ACSS significantly improves the adhesion and durability of the coating, resulting in high transmittance and mechanical stability. Further treatment with water and hexamethyldisilazane (HMDS) vapor enhances the hydrophobicity of the AR coating. The prepared coating shows excellent antireflective properties, with average transmittance of 96.06% in the wavelength range of 400 to 1000 nm.
Article
Chemistry, Multidisciplinary
Elham Zarenezhad, Sheida Esmaielzadeh, Somayeh Behrouz, Leila Emami
Summary: A novel copper(II) Schiff base complex was synthesized and characterized. The complex showed distorted square planar geometry. An efficient method for preparation of 1,2,3-triazole derivatives using immobilized Cu catalyst was developed. The synthesized compounds exhibited potent antifungal activity against Candida albicans and Candida krusei, with molecular docking studies showing significant interactions with the active site of Mycobacterium P450DM.
JOURNAL OF THE IRANIAN CHEMICAL SOCIETY
(2021)
Article
Biochemistry & Molecular Biology
Negar Parvizi, Delara Mohammad-Aghaie, Mohammad Navid Soltani Rad, Somayeh Behrouz, Mohamad Mehdi Alavianmehr
Summary: This study investigated the interaction mechanisms of Cafaminol with human serum albumin (HSA) using spectroscopic and molecular modeling techniques. The results showed that Cafaminol binds to site I of HSA through van der Waals and hydrogen bonding interactions.
JOURNAL OF BIOMOLECULAR STRUCTURE & DYNAMICS
(2022)
Article
Biochemistry & Molecular Biology
Mohammad Navid Soltani Rad, Somayeh Behrouz, Esmaeil Atashbasteh, Seyedeh-Sara Hashemi
Summary: A novel nano hybrid catalyst [BMIm]SS was successfully prepared and utilized in the synthesis of new IBP 1,2-diol mono esters with good yields. In vivo testing revealed potent analgesic activity in some synthesized compounds, particularly compound 1h. Docking analysis suggested strong binding affinity of active compounds, with 1h identified as a potential future drug candidate based on pharmacokinetic profiles and toxicity predictions.
BIOORGANIC CHEMISTRY
(2021)
Article
Biochemistry & Molecular Biology
Saman Sargazi, Sheida Shahraki, Omolbanin Shahraki, Farshid Zargari, Roghayeh Sheervalilou, Saeid Maghsoudi, Mohammad Navid Soltani Rad, Ramin Saravani
Summary: The study found that three synthesized 8-alkylmercaptocaffeine derivatives exhibited high cytotoxic activity against malignant tumor cells and may induce cell death through the cGMP pathway. These findings contribute to a better understanding of the potential role of methylxanthines as alternative treatments for cancer.
BIOORGANIC CHEMISTRY
(2021)
Article
Biochemistry & Molecular Biology
Mohammad Navid Soltani Rad, Somayeh Behrouz, Mehdi Mohammad-Javadi, Elham Zarenezhad
Summary: A novel hybrid nano-catalyst named HASPBAEECC was successfully synthesized and characterized, showing good performance in the synthesis process. The nano-catalyst exhibited stable, low cost, reusable and environmentally friendly properties. The synthesized compounds demonstrated promising antifungal activity against pathogenic fungi, with some compounds showing similar activity to fluconazole.
MOLECULAR DIVERSITY
(2022)
Article
Chemistry, Multidisciplinary
Ava Soltani Hekmat, Mojtaba Farjam, Kazem Javanmardi, Somayeh Behrouz, Elham Zarenezhad, Mohammad Navid Soltani Rad
Summary: The study presented a new class of aryloxy propanol amino acid derivatives for treating hypertension, with compound 4 d showing superior blood pressure lowering effects. Results indicated the appropriate fitting of (2-hydroxy-3-phenoxypropyl) glycine in the active site of human beta 2-adrenergic receptor.
Article
Chemistry, Organic
Somayeh Behrouz, Mohammad Navid Soltani Rad, Zahra Ganji, Marzieh Behrouz, Elham Zarenezhad, Mahmoud Agholi
Summary: This study describes the design, synthesis, and evaluation of new propargylamine derivatives containing a 2-methyl-5-nitroimidazole core. The propargylamines were efficiently synthesized through a three-component reaction and their antigiardial activity was investigated. Compound 2b exhibited potent antigiardial activity. In addition, in silico analysis was performed to assess the physicochemical properties and docking interactions of the compounds.
Article
Chemistry, Multidisciplinary
Mohammad Navid Soltani Rad, Somayeh Behrouz, Saleh Aghajani, Marzieh Behrouz, Elham Zarenezhad, Ali Ghanbariasad
Summary: This research describes the synthesis, characterization, and anticancer properties of novel 8-caffeinyl-triazolylmethoxy hybrid conjugates. Among the compounds tested, 22c showed potent activity against melanoma cells and had higher selectivity than methotrexate. Compound 22f showed the most activity against breast cancer cells but had lower selectivity than methotrexate. Overall, compounds 22c and 22f are potential candidates for future anticancer drugs.
Article
Chemistry, Multidisciplinary
Mohammad Navid Soltani Rad, Somayeh Behrouz, Kiana Shahbazkhani, Marzieh Behrouz, Elham Zarenezhad, Ali Ghanbariasad
Summary: This paper evaluates the design, synthesis, characterization, anticancer properties, toxicity, and in silico study of 8-piperazinyl caffeinyl-triazolylmethyl derivatives as new caffeine hybrid conjugates. The compounds showed potent anticancer activities against breast cancer and melanoma cancer cell lines, and exhibited strong binding affinities to B-RAF kinase and hDHFR enzymes. They also demonstrated good pharmacokinetic and physiochemical profiles. Due to these findings, compounds 12j and 12k are suggested for further research.
Article
Chemistry, Multidisciplinary
Ali Ghanbariasad, Leila Emami, Elham Zarenezhad, Somayeh Behrouz, Ali Zarenezhad, Mohammad Navid Soltani Rad
Summary: A series of promising 1,2,3-triazolyl-based metronidazole analogues were prepared using a specific catalyst and characterized. The compounds showed potent anti-Leishmania activity and were predicted to have desirable drug-like properties through molecular docking and computational chemistry methods.
NEW JOURNAL OF CHEMISTRY
(2022)
Review
Biochemistry & Molecular Biology
E. Zarenezhad, S. Behrouz, M. Farjam, M. N. Soltani Rad
Summary: In December 2019, the new human coronavirus SARS-CoV-2 began spreading, leading to COVID-19. Remdesivir has been proven effective in combating the virus and has been approved by the US FDA and the European Medicines Agency for treating COVID-19.
RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY
(2021)
