Article
Chemistry, Applied
Hegang Lu, Xiaoyan Li, Hongpeng Yang, Jiang Wu, Yi Zhang, Haidong Huang
Summary: The usability of Sanxan as a drug carrier was evaluated in this study, using riboflavin as a model drug. The results showed that the microcapsules prepared with Sanxan had good sphericity and regular appearance, and could be used for the sustained release of riboflavin. The viscosity structure of Sanxan was identified as an important factor in the slow release of riboflavin.
FOOD HYDROCOLLOIDS
(2022)
Article
Chemistry, Physical
Yeyoung Kang, Jae Hak Kim, Seo Young Kim, Won-Gun Koh, Hyun Jong Lee
Summary: The study confirmed that the combination of riboflavin phosphate (RFP) and blue light (BL) can increase collagen crosslinking density in skin tissue, improving mechanical properties and enhancing skin elasticity.
Article
Chemistry, Physical
Donghwan Ji, Pilseon Im, Sunmi Shin, Jaeyun Kim
Summary: Synthetic tough hydrogels have attracted attention for their ability to imitate the mechanical properties of natural hydrogels, but comparing their properties in different reports is challenging due to variations in testing specimen shapes and sizes. This study investigates how the geometry of a tough double-network hydrogel specimen affects its tensile mechanical values, specifically comparing the elastic modulus using various specimen shapes and sizes. The results highlight the importance of considering specimen dimensions in the measurement of tough hydrogel properties.
Article
Biochemistry & Molecular Biology
Pengxiang Xu, Jiangfeng Song, Zhuqing Dai, Yayuan Xu, Dajing Li, Caie Wu
Summary: The study investigated the construction of nano-lutein hydrogels with sustained release properties by cross-linking with different concentrations of Ca2+. Results showed that the highest loading capacity for lutein reached 770.88 μg/g, with an encapsulation efficiency of 99.39%. The presence of lutein nanoparticles and increased Ca2+ concentration both affected the physical properties and swelling behavior of the hydrogel. The stability of cross-linked ionic bonds in the hydrogel was reduced by lutein nanoparticles and excessive Ca2+, impacting its thermodynamic stability.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Biotechnology & Applied Microbiology
Donglei Liu, Hao Zhang, Xufeng Dong, Lin Sang, Min Qi
Summary: Cartilage tissue engineering technology provides a solution for treating osteoarthritis. In this study, cellulose nanocrystal/collagen hydrogels with tunable viscoelastic properties were used as a viscoelastic microenvironment to investigate the effects on chondrocyte behaviors. The results showed that enhancing the hydrogel's viscoelastic properties promoted cell shape change, proliferation, and matrix deposition, and reduced inflammation levels. Stress relaxation was identified as the factor with the strongest correlation to chondrocyte behaviors. FAK and YAP were also found to be involved in the chondrocytes' response to the hydrogel.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Chemistry, Applied
Antonio G. B. Pereira, Catia S. Nunes, Adley F. Rubira, Edvani C. Muniz, Andre R. Fajardo
Summary: Reinforcing Gum Arabic hydrogels with chitin nanowhiskers significantly improves their mechanical properties, making the nanocomposites stiffer and more resistant to elastic deformation while reducing their swelling capacity.
CARBOHYDRATE POLYMERS
(2021)
Article
Chemistry, Physical
Jiehuan Chen, Ningning Tang, Jiadong Zhou, Liangxuan Wang, Nianqiang Jiang, Nan Zheng, Linlin Liu, Zengqi Xie
Summary: The coexistence of rotationally pi-pi stacked columns and discrete slip-stacked dimers of PBI chromophores was revealed in the lamellar crystal of a head-to-tail linked PBI dyad. The lamellar crystals exhibited a low photoluminescence efficiency at room temperature, but showed a dramatic increase to around 90% at low temperature. Both the rotary and slip-stacked moieties were emissive, with nonradiative energy transfer processes between them being suppressed at low temperature, ensuring highly efficient excimer-like long-lived fluorescence.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Materials Science, Textiles
Bunnakorn Suntamit, Chutima Vanichvattanadecha, Varol Intasanta
Summary: This research explores the impact of ZnO nanoparticles on mechanically robust and functional nanofibers using polypropylene as a model matrix. The study shows that the co-spun fibers with ZnO exhibit significantly enhanced crystallinity and tenacity, attributed to the nucleating and toughening effects of the ZnO nanofillers.
FIBERS AND POLYMERS
(2021)
Article
Polymer Science
Min Sun Kong, Won-Gun Koh, Hyun Jong Lee
Summary: Hydrogels are widely used in tissue engineering to regulate cell functions. This study developed an injectable gelatin-based hydrogel that can sustainably release drugs by controlling its mechanical properties. The research demonstrated the controllable release of soluble factors, providing a promising biomaterial for tissue engineering and biomedical therapeutics.
Article
Engineering, Environmental
Marcela Pfeifer, Flavio A. C. Andrade, Ricardo Bortoletto-Santos, Fauze A. Aouada, Caue Ribeiro
Summary: This study investigated the effect of different surface-charged lamellar materials on the swelling and diffusion properties of synthesized polyacrylamide-methylcellulose hydrogels. Results showed that the presence of lamellar nanoparticles in hydrogels made the polymer matrix more rigid, and less likely to absorb water. However, hydrogels with hydrotalcite at specific ratios exhibited anomalous behavior with an increase in their water absorption capacity. This research suggests that the developed nanocomposite hydrogels can be suitable candidate materials for controlled release applications.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2021)
Article
Polymer Science
Ha N. Giang, Anh T. K. Le, Tuan N. A. Huynh, Thanh Khoa Phung, Wataru Sakai
Summary: This study cross-linked hydroxypropyl methylcellulose using citric acid and found that the addition of polyethylene glycol significantly improved the gel fraction of the hydrogel.
Article
Chemistry, Multidisciplinary
Changxiang Shao, Bingpeng Guo, Bing Lu, Jiahui Yu, Huijun Kong, Baolei Wang, Meichun Ding, Chenwei Li
Summary: The study employs perylene diimide derivatives as stable sunlight absorbers for solar vapor generation. Efficient photothermal conversion is achieved through strong intermolecular pi-pi stacking and intramolecular charge transfer. 3D hybrid hydrogels combining the absorbers and polyvinyl alcohol demonstrate high water evaporation rates. This research is of great importance for the design of photothermal small molecules and their application in solar water evaporation.
Article
Biochemistry & Molecular Biology
Qiaomei Zhu, Kexin Han, Wei Wei, Lujia Zhang, Jianbiao Gao, Tao Wu, Tiantian Zhao, Haitao Chen, Min Zhang
Summary: Cold-set interpenetrating polymer network gels based on wheat bran ara-binoxylans (AX) and pea protein isolate (PPI) were developed as riboflavin (RF) delivery vehicles. The concentration of AX affected the physicochemical properties, digestion properties, and microstructure of the gels. Higher AX concentrations increased the viscoelasticity and compactness of the gels, but at a concentration of 5.0%, separate network gels formed between PPI and AX.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Chemistry, Organic
Yoshihiro Takeo, Junichiro Hirano, Norihito Fukui, Hiroshi Shinokubo
Summary: We investigated the chemical and physical properties of internally functionalized DBC derivatives. These molecules exhibit chiral double-helicene-like structures that are configurationally stable at ambient temperatures. The conformational change in the excited state is controlled by the internal substituents, thereby modulating the emission intensity. Notably, the DBC derivative with a methylenedioxy unit undergoes aromatization through elimination of the internal substituent upon photoexcitation, resulting in the formation of DBC.
Article
Polymer Science
Svetlana A. Glukhova, Vyacheslav S. Molchanov, Boris V. Lokshin, Andrei V. Rogachev, Alexey A. Tsarenko, Timofey D. Patsaev, Roman A. Kamyshinsky, Olga E. Philippova
Summary: This study investigates the rheological properties of nanocomposite hydrogels, incorporating percolating halloysite nanotubes in a rigid network embedded in a soft alginate network cross-linked by calcium ions. The research reveals a pronounced shear-thinning behavior and significant viscosity drop, emphasizing the role of polymer cross-linking in enhancing the shear-thinning properties and viscosity recovery.
Article
Chemistry, Multidisciplinary
Takao Noguchi, Bappaditya Roy, Daisuke Yoshihara, Junji Sakamoto, Tatsuhiro Yamamoto, Seiji Shinkai
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2016)
Article
Chemistry, Multidisciplinary
Daisuke Yoshihara, Takao Noguchi, Bappaditya Roy, Junji Sakamoto, Tatsuhiro Yamamoto, Seiji Shinkai
Article
Chemistry, Multidisciplinary
Youichi Tsuchiya, Takao Noguchi, Daisuke Yoshihara, Bappaditya Roy, Tatsuhiro Yamamoto, Seiji Shinkai
Article
Chemistry, Physical
Bappaditya Roy, Takao Noguchi, Daisuke Yoshihara, Tatsuhiro Yamamoto, Junji Sakamoto, Seiji Shinkai
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2016)
Article
Polymer Science
Junji Sakamoto, Rio Kita, Isala Duelamae, Masashi Kunitake, Megumi Hirano, Daisuke Yoshihara, Tatsuhiro Yamamoto, Takao Noguchi, Bappaditya Roy, Seiji Shinkai
Article
Chemistry, Multidisciplinary
Reza Ghanbari, Salvatore Assenza, Abhijit Saha, Raffaele Mezzenga
Article
Chemistry, Multidisciplinary
Chilakapati Madhu, Bappaditya Roy, Pandeeswar Makam, Thimmaiah Govindaraju
CHEMICAL COMMUNICATIONS
(2018)
Review
Chemistry, Multidisciplinary
Bappaditya Roy, Thimmaiah Govindaraju
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2019)
Article
Nanoscience & Nanotechnology
Bappaditya Roy, Satyajit Pal, Thimmaiah Govindaraju
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Chemistry, Multidisciplinary
Mouli Konar, Bappaditya Roy, Thimmaiah Govindaraju
ADVANCED MATERIALS INTERFACES
(2020)
Article
Nanoscience & Nanotechnology
Komala Pandurangan, Bappaditya Roy, Kolla Rajasekhar, Yelisetty Venkata Suseela, Prachitha Nagendra, Abhishek Chaturvedi, Upadrasta R. Satwik, N. Arul Murugan, Upadrasta Ramamurty, Thimmaiah Govindaraju
ACS APPLIED BIO MATERIALS
(2020)
Article
Chemistry, Physical
Bappaditya Roy, Takao Noguchi, Daisuke Yoshihara, Junji Sakamoto, Seiji Shinkai
Article
Chemistry, Multidisciplinary
Daisuke Yoshihara, Takao Noguchi, Bappaditya Roy, Junji Sakamoto, Tatsuhiro Yamamoto, Seiji Shinkai
CHEMISTRY-A EUROPEAN JOURNAL
(2017)
Article
Chemistry, Multidisciplinary
Takao Noguchi, Bappaditya Roy, Daisuke Yoshihara, Junji Sakamoto, Tatsuhiro Yamamoto, Seiji Shinkai
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2017)
Article
Chemistry, Multidisciplinary
Bappaditya Roy, Takao Noguchi, Daisuke Yoshihara, Junji Sakamoto, Tatsuhiro Yamamoto, Seiji Shinkai
CHEMISTRY-A EUROPEAN JOURNAL
(2017)
Article
Chemistry, Organic
Faiza Diaba, Gisela Trenchs
Summary: The first violet light-mediated synthesis of gamma- and delta-lactams from N-alkenyl trichloroacetamides is reported in this paper. The reactions are conducted in tetrahydrofuran or 2-methyltetrahydrofuran as the sole solvent without catalysts or additives, under non-anhydrous conditions in an air atmosphere where the solvent serves as the radical initiator.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2024)
Article
Chemistry, Organic
Feroze Hussain, Sajjad Ahmed, Ashiq Hussain Padder, Qazi Naveed Ahmed
Summary: This study reports a novel and efficient one-pot synthesis method for mixed phosphorotrithioates, which does not require supplementary additives and shows broad applicability.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2024)
Article
Chemistry, Organic
Hyunjin Oh, Ikyon Kim
Summary: A new 1,2,4-triazole-pyrrolo[1,2-a]pyrazine hybrid system, 6-acylpyrrolo[1,2-a][1,2,4]triazolo[5,1-c]pyrazine, was synthesized using a catalyst-free method. This method involved sequential exposure of pyrrole-2-carbonitrile-derived substrates to DMF-DMA and acyl hydrazide, resulting in the formation of acylated pyrazine and 1,2,4-triazole rings, enabling the installation of various substituents at specific positions on the core skeleton.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2024)
Article
Chemistry, Organic
Ming Yan, Si-fan Wang, Yong-po Zhang, Jin-zhong Zhao, Zhuo Tang, Guang-xun Li
Summary: Here we developed an efficient photocatalytic approach for the convenient preparation of sulfinamides. The reaction allows for the gram-scale preparation of sulfinamides and the one-pot synthesis of various sulfonyl amides.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2024)
Article
Chemistry, Organic
Farzaneh Bandehali-Naeini, Zahra Tanbakouchian, Noushin Farajinia-Lehi, Nicolas Mayer, Morteza Shiri, Martin Breugst
Summary: Two tandem catalytic systems were developed for the synthesis of novel 3,4-disubstituted maleimides using the same Ugi adducts. Different maleimide structures can be synthesized using either Pd or Cu catalysis.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2024)
Article
Chemistry, Organic
Tanya Raghava, Anjan Chattopadhyay, Subhadeep Banerjee, Nivedita Sarkar
Summary: Amine substitution of two ortho fluorine atoms of tetrafluoroterephthalonitrile through SNAr chemistry is easily achievable. But further fluorine substitution is only possible under forcing conditions, yielding valuable fluorophores for bioimaging.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2024)
Review
Chemistry, Organic
Anju Chadha, Santosh Kumar Padhi, Selvaraj Stella, Sowmyalakshmi Venkataraman, Thangavelu Saravanan
Summary: Alcohol dehydrogenases are enzymes that use cofactors for oxidation or reduction reactions of alcohols or carbonyl compounds. They are utilized in green chemistry and have applications in the production of pharmaceuticals. Recombinant enzymes have solved the challenge of producing purified enzymes in large quantities. Engineered alcohol dehydrogenases have been used in asymmetric synthesis in industry. Various methods have been established for regenerating expensive cofactors to make the enzymatic process more efficient and economically viable.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2024)
