Article
Plant Sciences
Zsolt Gulyas, Blanka Moncsek, Kamiran Aron Hamow, Pal Straner, Zoltan Tolnai, Eszter Badics, Norbert Incze, Eva Darko, Valeria Nagy, Andras Perczel, Laszlo Kovacs, Vilmos Soos
Summary: This study characterizes D27-LIKE1 in Arabidopsis and highlights its important physiological and enzymatic functions related to carotenoids. The results show that D27-LIKE1 has multi-substrate specificity and may regulate carotenoid cis pools and the biosynthesis pathways of strigolactones and ABA.
Article
Chemistry, Applied
Jolanta Konieczkowska, Mariola Siwy
Summary: This work investigates the thermal cis-trans isomerization in solid-state for poly(ether imide)s and poly(ester imide)s with azobenzene or azo pyridine moieties. The study explores the relationship between various material aspects such as polyimide structure, molar mass, azo dye content, d-spacing value, polymer film thickness, and thermal cis-trans isomerization. The reversibility of the trans-cis-trans reaction was studied using different irradiation wavelengths. This is the first comprehensive article on solid-state cis-trans isomerization for azo polyimides.
Article
Physics, Fluids & Plasmas
Izabela Sliwa, Pavel Maslennikov, Alex Zakharov
Summary: A molecular model is proposed to describe the effective anchoring energy of a liquid crystal system. The model explains the mechanism behind the anchoring transition caused by structural changes in the photosensitive azobenzene layer.
Article
Chemistry, Multidisciplinary
Zhao Gao, Fei Yan, Lulu Shi, Yifei Han, Shuai Qiu, Juan Zhang, Feng Wang, Si Wu, Wei Tian
Summary: Photoisomeric supramolecular assemblies have been a hot topic in recent years. In general, the photoisomerization process from irregular aggregates to regular assemblies leads to the destruction of assemblies. However, through the conversion from planar to nonplanar photoisomer, a converse sol-to-gel transition has been achieved. A well-designed acylhydrazone-linked monomer, with imine for trans-cis interconversion and amide for intermolecular hydrogen bonding, is used to drive the photoisomerization-induced self-assembly. The counterintuitive sol-to-gel transition is attributed to the partial trans->cis photoisomerization of acylhydrazone, which changes the stacking mode of monomers. This reversible phase transition also holds potential for miniature materials, as demonstrated in the formation of in situ valves in microfluidic devices.
Article
Biochemistry & Molecular Biology
Huan-Hua Xu, Liang Yang, Ming-Xia Tang, An-Ping Ye, Bo-Dan Tu, Zhen-Hong Jiang, Jian-Feng Yi
Summary: This study found that the degree of isomerization of lobeline has a significant impact on its respiratory excitatory effects. The respiratory excitatory effect was significantly reduced with the administration of trans-lobeline injections compared to cis-lobeline injections. The study also discovered that isomerization is a one-way reaction catalyzed by temperature, with pH as the key factor. Lobeline, as a nonselective antagonist with high affinity for nicotinic acetylcholine receptors, has shown potential in the treatment of addiction and nervous system disorders.
Article
Chemistry, Physical
Taposi Chatterjee, Ersad Hossain, Samim Khan, Sourav Roy, Saikh Mohammad Wabaidur, Md Ataul Islam, Seikh Mafiz Alam, Mohammad Hedayetullah Mir
Summary: A Zn(II) based two-dimensional metal-organic framework (MOF) 1 has been synthesized by a slow diffusion method. Compound 1 exhibits photoluminescence property and undergoes in situ cis,cis- to cis,trans-isomerization under visible light. Non-covalent interactions within compound 1 have been investigated using Hirshfeld surface analysis.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Chemistry, Multidisciplinary
Xia Yu, Yuzhang Meng, Hao Zhang, Junbo Guo, Shixian Wang, Hui Li, Jun Hu, Min-Hui Li
Summary: This study synthesized and characterized two pure stereoisomers, trans- and cis-TPE-2GA, which exhibited different aggregation-induced emission, self-assembly properties, and crystallinity. The cis-TPE-2GA showed mechano-chromic properties and a lower energy gap, higher quantum yield, and longer lifetime compared to trans-TPE-2GA, explaining their differences in fluorescence and mechano-chromic properties.
Article
Chemistry, Physical
Isabella C. D. Merritt, Denis Jacquemin, Morgane Vacher
Summary: This study revisits the cis -> trans photo-isomerisation mechanism of azobenzene using high-level ab initio surface hopping mixed quantum-classical dynamics. Results show a reduction of photoisomerisation quantum yield on exciting to the higher energy pi pi* state compared to the lower energy n pi* state. The explanation for the decrease in quantum yield is found to be different from that observed in the trans -> cis photoisomerisation scenario.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Biochemistry & Molecular Biology
Kritika Kumari, Marina Warepam, Aniket Kumar Bansal, Tanveer Ali Dar, Vladimir N. Uversky, Laishram Rajendrakumar Singh
Summary: TMAO is a significant metabolite derived from various organic compounds, with diverse biological functions in humans. Studies have shown its crucial impact on protein folding and cell cycle, potentially leading to protein misfolding and the development of related diseases.
CELLULAR AND MOLECULAR LIFE SCIENCES
(2022)
Article
Food Science & Technology
Chongyun He, Likang Qin, Jianmei Yang, Yong Zhu
Summary: The regularity of cis-trans isomerization of unsaturated fatty acids in camellia oil under heating was explored through fatty acid profile evolution and reaction kinetics. The temperatures for generating mono-trans linoleic acids and linolelaidic acid were significantly higher than that of elaidic acid. The total trans fatty acids content increased with heating temperature. The study also calculated the activation energy of the cis-trans isomerization reactions, which provides valuable information for inhibiting trans fatty acid formation during camellia oil processing.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Fanni Sebak, Janos Szolomajer, Nandor Papp, Gabor K. Toth, Andrea Bodor
Summary: The type of neighboring amino acids, especially aromatic and positively charged sidechains, has been found to affect the cis-Pro content. These findings can assist in the design of protein regions with specific cis-Pro content and contribute to a better understanding of the roles and functions of IDPs.
FRONTIERS IN BIOSCIENCE-LANDMARK
(2023)
Article
Polymer Science
Moritz Stuck, Irina Krenz, Benedikt Schulze Koekelsum, Susanne Boye, Brigitte Voit, Reinhard Lorenz
Summary: The study focused on the influence of different curing conditions and styrene concentrations on the resin properties, demonstrating that the Tg of the network can be increased by applying new thermal curing profiles and increasing the styrene content. Additionally, the partial substitution of problematic styrene with substances like maleic anhydride was found to significantly improve the reactivity and mechanical properties of the resin.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Chemistry, Organic
Ryan Thurston, Viviane Zantop, Kristen Sodam Park, Harald Maid, Anke Seitz, Markus R. Heinrich
Summary: In this study, we have presented the first examples of reversible pH-dependent switching from full trans to full cis by exploiting the effects of steric demand and the interaction of the amide carbonyl with a positive charge.
Article
Polymer Science
Catalin-Paul Constantin, Ion Sava, Mariana-Dana Damaceanu
Summary: Novel azopolyimides with highly photo-responsive properties were synthesized and characterized, showing efficient and stable cis-trans photo/thermal isomerization. UV-vis and H-1 NMR investigations indicated unprecedentedly fast trans-cis switches and excellent efficiency up to 90.2%, with excellent stability even after repetitive switching cycles. The PI films without dilution exhibited high efficiency and stability in photoisomerization studies.
Article
Chemistry, Multidisciplinary
Arui Huang, Jie Hu, Mengmeng Han, Kangwei Wang, Jian Long Xia, Jiajia Song, Xuelian Fu, Kai Chang, Xiaocong Deng, Siwei Liu, Qianqian Li, Zhen Li
Summary: This study demonstrated multiple photodeformable processes in anil-poly(ethylene terephthalate) systems utilizing excited-state intramolecular proton transfer and trans-cis isomerization as microscopic molecular motions under light stimulus. The doping films were able to achieve light-driven contraction and bending angle during a simple stretching process. The internal mechanism and relationship between molecular structure and photocontrolled motion were investigated through transient absorption spectra, theoretical calculations, and crystal analysis.
ADVANCED MATERIALS
(2021)
Article
Polymer Science
Alessandro Nanni, Massimo Messori
Summary: This study investigates the effects of wine seed polyphenolic extracts and wine lees on the thermal stability, mechanical properties, and biodegradation of poly(3-hydroxybutyrate) (PHB). Various formulations were tested to compare the results with unstabilized PHB, and different concentrations of wine lees were mixed with PHB for characterization. Biodegradation tests were conducted in soil and marine water to evaluate the microbial degradation of the tested PHB formulations.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Environmental Sciences
Alberto Giubilini, Corrado Sciancalepore, Massimo Messori, Federica Bondioli
Summary: The research utilized oat hull fibers as a filler for a fully bio-based polymer-matrix composite material, with a silanization procedure to improve matrix-filler affinity. Results showed that the fibers not only acted as inert filler, but also slightly improved the mechanical properties of the neat biopolymer.
JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT
(2021)
Article
Polymer Science
Greta Giacobazzi, Claudio Gioia, Micaela Vannini, Paola Marchese, Valerie Guillard, Helene Angellier-Coussy, Annamaria Celli
Summary: The research indicates that amorphous and highly crystalline PEV films exhibit different water vapor sorption properties at various relative humidity levels, with non-Fickian relaxations leading to additional water absorption. The water diffusion coefficients of amorphous PEV are approximately 10 times higher than that of amorphous PET, attributed to the enhanced segmental flexibility of PEV chains.
Review
Biochemistry & Molecular Biology
Layde T. Carvalho, Thiago A. Vieira, Yanjun Zhao, Annamaria Celli, Simone F. Medeiros, Talita M. Lacerda
Summary: In recent years, there has been increasing attention on naturally occurring biological macromolecules and their applications in various industries. Microbial polyhydroxyalkanoates (PHAs) and exopolysaccharides (EPS) are commonly used for the development of biomaterials due to their unique biological features.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Review
Chemistry, Multidisciplinary
Grazia Totaro, Laura Sisti, Paola Marchese, Martino Colonna, Angela Romano, Claudio Gioia, Micaela Vannini, Annamaria Celli
Summary: This review provides an up-to-date overview of the main synthetic pathways to obtain FDCA from HMF, with a specific focus on process sustainability.
Article
Polymer Science
Maria Cristina Righetti, Micaela Vannini, Annamaria Celli, Daniele Cangialosi, Carla Marega
Summary: This study assessed the temperature dependence of the constrained amorphous interphase or rigid amorphous fraction (RAF) in biobased semi-crystalline poly(ethylene 2,5-furandicarboxylate) (PEF). The results showed that the RAF developed parallel to the crystal phase during crystallization at lower temperatures, and vitrified upon subsequent cooling. The physical properties of RAF were found to be different from those of the amorphous fraction far from the crystals. The study also revealed the significant influence of temperature on the crystal phase and crystallization rate.
Article
Polymer Science
Antonella Rosato, Angela Romano, Grazia Totaro, Annamaria Celli, Fabio Fava, Giulio Zanaroli, Laura Sisti
Summary: This study investigated the degradation ability of commercial hydrolytic enzymes belonging to different subclasses on different aliphatic polyesters. The results showed that PCL and PBSA were the most biodegradable polyesters under the conditions used in this study, while PLA and PPC were not completely degraded. Chemical analysis confirmed that the enzymatic degradation occurred homogeneously from the surface without significantly affecting the macromolecular structure and thermal stability.
Article
Polymer Science
Maria Pilar Villanueva, Claudio Gioia, Laura Sisti, Laura Marti, Raquel Llorens-Chiralt, Steven Verstichel, Annamaria Celli
Summary: The use of bioplastic mulch in agriculture has significantly increased worldwide in recent years. The main challenge is to improve the durability of biodegradable materials in the soil by using sustainable antioxidant systems.
Article
Polymer Science
Cristina Minnelli, Pierluigi Stipa, Simona Sabbatini, Paolo Mengucci, Giovanna Mobbili, Roberta Galeazzi, Tatiana Armeni, Brenda Romaldi, Annamaria Celli, Emiliano Laudadio
Summary: This study investigates the impact of EGCG on the properties of PLGA nanoparticles and highlights the role of the PVA/Poloxamer-407 system in stabilizing the colloidal NPs. The nanodispersions show promising cytotoxic potential in lung carcinoma cell lines, enhancing the growth-inhibiting effect of EGCG.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Biochemistry & Molecular Biology
Angela Romano, Antonella Rosato, Stefano Bianchi, Giulio Zanaroli, Annamaria Celli, Grazia Totaro, Laura Sisti
Summary: The use of degrading enzymes in polymer formulation is a promising method for managing plastic waste. However, high temperatures can negatively affect enzyme activity, so protective strategies are necessary. This study explores the use of layered double hydroxides as a protective agent for cutinase, a polyester hydrolytic enzyme. Various media are evaluated for releasing the enzyme, and phosphate buffer is found to be the most effective. The effect of pH and concentration on enzyme release is also investigated.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Green & Sustainable Science & Technology
Angela Romano, Antonella Rosato, Grazia Totaro, Giulio Zanaroli, Annamaria Celli, Laura Sisti
Summary: The use of polymer-degrading enzymes in polymer formulation is an attractive strategy to improve the recyclability of plastics. This research focuses on the use of thermally stable enzymes as innovative materials to enhance the circularity of packaging materials. By immobilizing the cutinase enzyme in Mg/Al layered double hydroxide structures, its thermal stability is significantly improved, leading to efficient degradation of poly (butylene succinate-co-adipate) films.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Polymer Science
Stefano Bianchi, Paola Marchese, Micaela Vannini, Laura Sisti, Annalisa Tassoni, Maura Ferri, Norma Mallegni, Patrizia Cinelli, Annamaria Celli
Summary: In this study, the antioxidant activity of natural phenolic compounds extracted from coffee residues was evaluated. The addition of these compounds to a poly(1,4-butylene succinate) matrix was found to increase the activation energy of thermo-oxidative degradation. The results were consistent with the ABTS radical scavenging assay, highlighting the potential of using active molecules from agri-food waste to enhance the antioxidant capacity of biopolymers.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Physical
Paolo Canepa, Claudio Canale, Ornella Cavalleri, Giovanni Marletta, Grazia M. L. Messina, Massimo Messori, Rubina Novelli, Simone Luca Mattioli, Lucia Apparente, Nicola Detta, Tiziana Romeo, Marcello Allegretti
Summary: A multi-technique approach was used to study the interaction of rhNGF with different pharma grade polymeric materials. It was found that copolymers showed lower crystallinity and roughness, as well as higher contact angle values compared to PP homopolymers, indicating a lower surface wettability for the protein. Thus, copolymers may offer an advantage in terms of protein interaction/adsorption. Additionally, protein adsorption was found to be a self-limiting process that passivates the surface after the deposition of roughly one molecular layer.
Article
Chemistry, Multidisciplinary
Gonzalo A. Martinez, Salvatore Puccio, Joana M. B. Domingos, Elena Morselli, Claudio Gioia, Paola Marchese, Anna Maria Raspolli Galletti, Annamaria Celli, Fabio Fava, Lorenzo Bertin
Summary: This study proposes a sustainable strategy for utilizing grape pomace, chain elongation fermentation, and demonstrates the successful utilization of highly concentrated grape pomace-derived products in various productions.