Article
Chemistry, Physical
Darius Abramavicius, Serguei Krouglov, Virginijus Barzda
Summary: The microscopic theory for second harmonic generation in a helical molecular system is developed, including non-local interaction effects. The response is derived to isolate the quadratic coupling terms, denoted as the K coupling, which reveal system inhomogeneities. Dipolar and quadrupolar contributions reflect system symmetry and homogeneity.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Zhuo Li, Jinlian Lu, Lei Jin, Jan Rusz, Vancho Kocevski, Hideto Yanagihara, Eiji Kita, Joachim Mayer, Rafal E. Dunin-Borkowski, Hongjun Xiang, Xiaoyan Zhong
Summary: Spinel ferrites are important materials with magnetic properties relevant for industrial applications. However, antiphase boundaries commonly found in spinel ferrite films can hinder their use in spintronic devices and sensors due to their impact on magnetic degradation and magnetoresistance. Novel imaging techniques and computational methods have been employed to investigate the atomic structure and magnetic properties of individual antiphase boundaries, providing insights into magnetic coupling at the atomic scale.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Biochemistry & Molecular Biology
Garry E. Smith, Dmitri Tolkatchev, Cristina Risi, Madison Little, Carol C. Gregorio, Vitold E. Galkin, Alla S. Kostyukova
Summary: Transient increase in Ca2+ concentration is essential for proper sarcomere function. Ca2+ binds to leiomodin and attenuates its actin nucleating activity.
Article
Chemistry, Multidisciplinary
Julian Full, Santosh P. Panchal, Julian Gotz, Ana-Maria Krause, Agnieszka Nowak-Krol
Summary: Helically chiral compounds with one and two boron atoms were synthesized using a modular approach, showing exceptional configurational stability and fluorescence properties. The compounds are proposed as primary structures of extended helices, with potential applications in materials science.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Mei Wang, Chiwoo Park, Taylor J. Woehl
Summary: This study utilized liquid phase transmission electron microscopy to directly observe the self-assembly of platinum nanoparticles into dense 3D supraparticles over tens of seconds during colloidal nanoparticle synthesis. Varying interparticle interactions by changing precursor chemistry revealed that supraparticle formation was driven by weak attractive van der Waals forces balanced by short ranged repulsive steric interactions. Growth kinetic measurements and an interparticle interaction model showed that nanoparticle surface diffusion rates on the supraparticles were significantly faster than nanoparticle attachment.
Article
Biochemistry & Molecular Biology
Shivani A. Muthu, Rahul Sharma, Afnaan Qureshi, Suhel Parvez, Basir Ahmad
Summary: This study evaluates the effectiveness of Glycyrrhizic acid (GA) as an inhibitor of amyloid aggregation of lysozyme. The results show that GA can prevent fibril formation and modulate the aggregation-prone state of lysozyme. This research highlights the potential of GA as a treatment for amyloidosis and neurodegenerative diseases.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Optics
Xianhui Fu, Jiwei Qi, Hao Hu, Sihao Zhang, Qiang Wu, Yao Lu, Hao Xiong, Hongjin Wu, Zongqiang Chen, Jing Chen, Xuanyi Yu, Qian Sun, Jingjun Xu
Summary: We propose and experimentally demonstrate the achievement of giant asymmetric reflection of circularly polarized light in single-layer extrinsic chiral metasurfaces based on asymmetric coupling. The asymmetric coupling and reflection are caused by extrinsic chirality, allowing for extremely high values. The research provides an effective method for constructing huge asymmetric coupled systems to manipulate electromagnetic waves.
Article
Biochemistry & Molecular Biology
Jose L. Neira, Ana Camara-Artigas, Jose Gines Hernandez-Cifre, Maria Grazia Ortore
Summary: The research focused on the conformational characterization of Bacillus subtilis HPrK/P, revealing that the protein exhibited high conformational stability at pH 7.0, strong pH sensitivity, and denaturation through an oligomeric intermediate in guanidinium hydrochloride denaturation.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Chemistry, Physical
Jin-Hu Dou, Maxx Q. Arguilla, Yi Luo, Jian Li, Weizhe Zhang, Lei Sun, Jenna L. Mancuso, Luming Yang, Tianyang Chen, Lucas R. Parent, Grigorii Skorupskii, Nicole J. Libretto, Chenyue Sun, Min Chieh Yang, Phat Vinh Dip, Edward J. Brignole, Jeffrey T. Miller, Jing Kong, Christopher H. Hendon, Junliang Sun, Mircea Dinca
Summary: Researchers have successfully grown single crystals of 2D metal-organic frameworks up to 200 µm in size by balancing in-plane and out-of-plane interactions, revealing anisotropic transport and a clear correlation between conductivity and the nature of the metal cation in the sheets.
Article
Polymer Science
Yang Zhao, Jingfa Yang, Minghua Liu, Jiang Zhao
Summary: Switchable inversion of chirality between opposite handedness by varying pH is found in a histidine pendant polymer, PBHis. This phenomenon is demonstrated by circular dichroism and fluorescence correlation spectroscopy, which measure the changes of hydrodynamic radius at the single molecular level. Below pH 8.0, the polyelectrolyte adopts M-helicity, while above pH 8.0, it changes into P-helicity. Above pH 10.6, the helicity further inverses into M-chirality. The protonation and deprotonation of the imidazole group, as well as the hydroxide-ion-mediated hydrogen bonding, determine the mutual orientation and handedness of the helical structure.
Article
Physics, Applied
Yilin Wang, Weijin Chen, Shilei Li, Zhi-Ling Hou, Li Yu
Summary: The extrinsic chiroptical effects based on directional nanoantennas are explored in this study. These effects are characterized by the angular emission patterns in momentum space, and can be tuned by changing the refractive index of the surrounding medium. This research provides a new perspective for understanding chirality and has important applications in biosensing and chiral photon detection.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Optics
Zhibiao Zhu, Zhe Qin, He Wang, Lixin Jiang, Yongfeng Li, Wenjie Wang, Hongya Chen, Jiafu Wang, Yongqiang Pang, Shaobo Qu
Summary: The proposed switchable chiral mirror based on PIN diodes allows for spin selective absorption of LCP or RCP waves. It has four working states, functioning as a handedness-preserving mirror, LCP mirror, RCP mirror, and perfect absorber. This is the first report of its kind in the microwave frequency band, achieved by changing the chirality of 2D chiral metamaterials and the circular conversion dichroism related to it.
PHOTONICS RESEARCH
(2023)
Article
Agriculture, Multidisciplinary
Xiankang Fan, Li Fu, Mingzhen Liu, Yangying Sun, Xiaoqun Zeng, Zhen Wu, Lihui Du, Daodong Pan
Summary: This study investigated the dose-dependent effects of LNT on the gelling properties and chemical changes of oxidatively stressed goose myofibrillar protein. The results showed that adding LNT could improve gel strength, protein solubility, and conformational changes. Therefore, LNT is recommended for enhancing the gelling potential of oxidatively stressed goose meat.
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
(2023)
Article
Chemistry, Physical
Zonglin Li, Mingxin Xie, Guozheng Nie, Junhui Wang, Lujun Huang
Summary: In this study, we developed an optical biosensor based on an all-dielectric metasurface with broken symmetry. The biosensor exhibited excellent performance, thanks to the high-Q quasi-bound states in the continuum (qBICs) and the efficient field confinement. It has potential applications in extreme biochemical sensing, such as COVID-19 detection at ultralow concentrations.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Biochemistry & Molecular Biology
Muzaffar Hussain Najar, Oyais Ahmad Chat, Parvaiz Ahmad Bhat, Mohammad Amin Mir, Ghulam Mohamamd Rather, Aijaz Ahmad Dar
Summary: In this study, the interactions between a series of bile salts and trypsin were investigated using multiple techniques. The results showed that bile salts with higher hydrophobicity had stronger interactions with trypsin, leading to significant unfolding of the protein. The findings contribute to a better understanding of hydrophobicity-driven unfolding of proteins aided by biological surfactants like bile salts.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)