Article
Multidisciplinary Sciences
Jia Xu, Tiange Gao, Lingjie Sheng, Yan Wang, Chenxi Lou, Haifang Wang, Yuanfang Liu, Aoneng Cao
Summary: Molecular conformational engineering aims to engineer flexible non-functional molecules into unique conformations to create novel functions. Researchers propose the use of metal nanoparticles as a replacement of protein scaffolds for conformationally engineering protein fragments. By restoring antigen-recognizing function on the surface of silver nanoparticles, an artificial antibody called Silverbody is created.
Article
Biophysics
McKenzie B. Riley, Evan Strandquist, Christopher S. Weitzel, Jeremy D. Driskell
Summary: Research shows that the thiolated analog of a protein has a greater affinity for gold nanoparticles (AuNPs) and is able to form a robust hard corona, maintaining structure and function, compared to the unmodified protein which denatures with prolonged exposure to AuNPs resulting in loss of enzymatic function.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2022)
Review
Biochemistry & Molecular Biology
Cinzia Verde, Daniela Giordano, Stefano Bruno
Summary: Heme proteins exhibit dual reactivity towards nitric oxide (NO) and cysteine residues, resulting in heme-dependent nitrosylation and S-nitrosylation. This interplay between heme proteins and NO plays a crucial role in the production, scavenging, and transport of nitrogen compounds. Understanding the biological functions associated with heme nitrosylation and S-nitrosylation is important in elucidating signaling pathways.
Article
Chemistry, Physical
N. K. Murugasenapathi, K. A. Esther Jebakumari, S. Jamal Mohamed, K. Giribabu, Tamilarasan Palanisamy
Summary: In this study, the redox reaction of Nile Blue A on a glassy carbon surface was investigated using pinhole-free silica-coated silver nanoparticles for Raman signal enhancement. The interference from silver in the reaction mechanism was observed and the pinhole-free silica layer prevented hot electron transfer, providing interference-free enhancement to the Raman signals.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Physical
Pengcheng Li, Xiaoan Li, Shujuan Dai
Summary: Experimental research and quantum chemical calculations were conducted to investigate the adsorption of gold-thiosulfate ions on a quartz surface. The results revealed that quartz and gold-thiosulfate ions undergo both physical and chemical adsorption under different conditions.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Analytical
Tieyi Lu, Li Fu, Yu Qiu, Jifeng Zhang, Zhan Chen
Summary: The interaction between antibodies and silicone oil was studied, and it was found that surfactant can reduce the adsorption of antibodies on silicone oil but may not completely prevent it. Different antibodies require different concentrations of surfactant to prevent adsorption.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Huiqun Niu, Hongying Yang, Linlin Tong, Ali Reza Kamali
Summary: In this study, the gold adsorption performance of elemental carbon extracted from refractory carbonaceous gold ores was extensively investigated. Various factors affecting the adsorption process were studied and kinetic and isotherm models were established to describe the adsorption behavior. Analytical methods such as SEM, BET, XRD, FTIR, and Raman spectroscopy were used to elucidate the adsorption mechanism. The results showed that the adsorption process was pH and temperature dependent, and the gold adsorption behavior followed the pseudo-first-order and Freundlich model.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Biochemistry & Molecular Biology
Yasiru Randika Perera, Joanna Xiuzhu Xu, Dhanush L. Amarasekara, Alex C. Hughes, Ibraheem Abbood, Nicholas C. Fitzkee
Summary: The study focused on examining the adsorption amount of biomolecules on PEGylated gold nanoparticles, revealing that cysteine residues can dramatically increase adsorption rates, and shorter chain PEG molecules are more effective in protecting against all protein types.
Article
Chemistry, Organic
Junjie Ying, Jingrong Huang, Chenguang Liu, Fa-Jie Chen, Chunfa Xu, Fen-Er Chen
Summary: This study reports a copper-catalyzed arylation reaction using readily available arylboronic acids for S-tosyl peptides. The method features high yields and a wide variety of aryl groups, enabling efficient synthesis of S-arylated cysteines and peptides under mild conditions.
ORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Physical
Hrant H. Gharabekyan, Joachim Koetz, Armen H. Poghosyan
Summary: The study revealed that protonated L-cysteine strongly adsorbs onto the gold surface via its sulfur and oxygen atoms, with an average distance of -2.7 angstrom and -3.2 angstrom respectively. The adsorption mainly occurs at the bridge site with a probability of 82%.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Physical
Ke Li, Qian Li, Yan Zhang, Yongbin Yang, Tao Jiang
Summary: Thiourea leaching is a promising alternative to cyanidation for gold recovery. This study investigated the effect of metal ions on gold adsorption onto activated carbon from acidic thiourea solution. Metal ions such as Cu2+, Ag+, Pb2+, and Zn2+ interfered with gold adsorption, with Cu2+ and Ag+ having the greatest impact. Metal ions also adsorbed onto activated carbon, with their adsorption capacity following the order of Cu2+ > Ag+ > Pb2+ > Zn2+. The decrease in active sites on activated carbon occupied by metal ions resulted in a decrease in gold adsorption.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Hematology
Bastien Moes, Hua Li, Patricia Molina-Ortiz, Coraline Radermecker, Adeline Rosu, Charles-Andrew Vande Catsyne, Sufyan Ali Sayyed, Joao Fontela, Mafalda Duque, Alice Mostafa, Abdelhalim Azzi, Joao Barata, Ramon Merino, Chenqi Xu, Christophe J. Desmet, Stephane Schurmans
Summary: The downstream signaling of IL-7R plays important roles in lymphoid cell differentiation and proliferation of acute lymphoblastic leukemia cells. The loss of INPP5K leads to altered IL-7 receptor structure, resulting in defective IL-7 signaling and impaired B-cell differentiation. Reduced expression of INPP5K also affects mutated IL-7Ra chains, leading to reduced cell proliferation in leukemia.
Article
Chemistry, Physical
Ridha Lafi, Lotfi Abdellaoui, Imed Montasser, Walid Mabrouk, Amor Hafiane
Summary: The study investigated the effect of the head group structure of surfactant on the adsorption of methyl red onto modified coffee residues. The results showed that zwitterionic surfactant was the most efficient for the adsorption of methyl red.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Chemistry, Analytical
Tian Zhang, Chaoqing Dong, Jicun Ren
Summary: A novel measurement strategy was proposed to investigate the protein corona formed in nanoparticles using a dual-wavelength laser-irradiated differenced resonance light scattering correlation spectroscopy (D-RLSCS) technique. The binding constants and rates between proteins and gold nanoparticles (GNPs) were determined using the ratiometric diffusion change of NPs. The study also investigated the dynamic behavior of the protein corona in a fluid flow mimicking biological vessels using a microfluidic channel.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Ana Ligero, Monica Calero, M. Angeles Martin-Lara, Gabriel Blazquez, Rafael R. Solis, Antonio Perez
Summary: The potential use of activated char obtained from the pyrolysis of non-recyclable plastics for CO2 adsorption in fixed-bed columns was investigated. The plastic waste collected from a municipal solid treatment plant was pyrolyzed to produce char residue, which was then activated to create a porous carbonaceous material. Continuous column tests demonstrated successful fitting of breakthrough curves to the dose-response model. The effects of adsorption temperature, CO2 concentration, and bed length on process efficiency were evaluated using surface response methodology.
JOURNAL OF CO2 UTILIZATION
(2023)