Article
Chemistry, Multidisciplinary
Simone Bagatella, Riccardo Ciapponi, Stefano Turri
Summary: Polyhydroxyalkanoates are a promising class of biopolymers that can allow the production of sustainable plastic materials. The study found that nanoindentation with the Atomic Force Microscope allows an estimation of the Elastic Modulus, which can be useful for preliminary measurement when only a limited amount of material is available.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Applied
Leonardo M. B. Ferreira, Valeria M. O. Cardoso, Igor dos Santos Pedriz, Mauricio P. C. Souza, Natalia N. Ferreira, Marlus Chorilli, Maria P. D. Gremiao, Valtencir Zucolotto
Summary: This study provides fundamental understanding of mucus-modulatory strategies using charged bio-polymers of different molecular weights and surface charges. Biophysical evidence supports that the interactions between low-molecular-weight polycation chitosan oligosaccharides (COSs) and high-molecular-weight polyanion dextran sulfate (DS) with mucin (MUC) exhibit distinct thermodynamic signatures. The results suggest that electrostatics is not the driving force governing COS-MUC interactions.
CARBOHYDRATE POLYMERS
(2023)
Article
Engineering, Mechanical
David C. Roache, Clifton H. Bumgardner, Yunya Zhang, David Edwards, David DeGonia, Bryan Rock, Xiaodong Li
Summary: Wear reduction is critical in the automotive industry, and the generation of tribofilms by additive-infused lubricants has been effective in reducing wear. The progress of ashless tribofilms offers a promising solution for better protection. Phosphorus and sulfur content are well correlated with wear performance, with higher phosphorus and lower sulfur offering better protection. Higher elastic modulus is also strongly correlated with better wear performance.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Materials Science, Characterization & Testing
Petra Christoefl, Caterina Czibula, Michael Berer, Gernot Oreski, Christian Teichert, Gerald Pinter
Summary: Instrumented nanoindentation was utilized to examine the viscoelastic properties of PMMA as an amorphous polymer model. Evaluation methods combining adhesive contact and empiric models were applied to determine the elastic moduli, and comparison with AFM-NI and compression tests were conducted. The results showed good agreement between NI and AFM-NI, with only slightly lower values obtained with the O&P based AFM-NI method.
Review
Biochemistry & Molecular Biology
Viktor V. Revin, Elena V. Liyaskina, Marina V. Parchaykina, Irina V. Kurgaeva, Kristina V. Efremova, Nikolai V. Novokuptsev
Summary: Degradable biopolymers have gained increasing importance as environmentally friendly biomaterials, with bacterial exopolysaccharides (EPSs) being particularly versatile and widely used. Xanthan and bacterial cellulose (BC) are two commercially significant EPSs with diverse applications, and finding efficient production methods is crucial for their practical use.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Pharmacology & Pharmacy
Peter Bitsch, Eva S. Baum, Irati Beltran Hernandez, Sebastian Bitsch, Jakob Harwood, Sabrina Oliveira, Harald Kolmar
Summary: In this study, nanobody dextran polymer conjugates (dextraknobs) loaded with small molecules were developed for cancer diagnostics and therapy. It was found that using smaller sized dextrans improved the homogeneous penetration of the conjugates into tumor spheroids. Additionally, the dextraknobs showed potent cell killing effects in photodynamic therapy. The monovalent nanobody conjugates exhibited deeper and more homogeneous penetration compared to the bivalent conjugates. These findings encourage further development of dextraknobs.
Article
Materials Science, Ceramics
Yonglong Lai, Jiaxin Yu, Laixi Sun, Fang Wang, Qiuju Zheng, Hongtu He
Summary: This study investigates the time dependent deformation of soda lime silicate and silica glass surfaces through nanoindentation creep tests. The results show a decrease in nanomechanical properties of both glasses with holding time. Additionally, a quick recovery in the residual depth of nanoindentation imprint for both glasses is observed after the indenter tip is retracted and before atomic force microscopy.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Physics, Applied
Hanjun Jiang, Lu Zheng, Yuan Wei, Xuewen Wang
Summary: This study investigated the mechanical behavior of 2D MoS2 by applying a point load on a flexible substrate and analyzed it through finite element simulation. By combining nanoindentation experiments with theoretical simulations, a better understanding of the mechanical properties of 2D materials on flexible substrates was achieved. This research provides important experimental data for the development of flexible devices based on functional 2D materials.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Engineering, Environmental
Marisa Faria, Cesar Cunha, Madalena Gomes, Ivana Mendonca, Manfred Kaufmann, Artur Ferreira, Nereida Cordeiro
Summary: Microplastics pollution is a significant issue, and current filtration systems in wastewater treatment plants are unsustainable. The development of bacterial cellulose biopolymers provides a sustainable solution for microplastics removal. The study shows that these biopolymers have high removal efficiency for microplastics and can be used in a circular manner.
Review
Polymer Science
Viktor V. Revin, Elena Liyaskina, Marina Parchaykina, Tatyana P. Kuzmenko, Irina Kurgaeva, Vadim D. Revin, Muhammad Wajid Ullah
Summary: Bacterial cellulose is an environmentally friendly material with unique structural and physicochemical properties, which has been increasingly studied for various applications in the past decade. Current research focuses on the development of BC-based nanocomposites with advanced functionalities, although commercial production is hindered by cost and low yield.
Article
Materials Science, Multidisciplinary
Wiktor Niemiec, Maria Owinska, Anna Ferenc, Michal Szuwarzynski, Elzbieta Dlugon
Summary: A silicon oxycarbide-carbon nanotube coating on steel was synthesized using a novel approach, resulting in homogenous layers with investigated morphology and nanomechanical properties through methods such as infrared spectroscopy and X-ray diffraction.
Article
Nanoscience & Nanotechnology
Aristide Djoulde, Mengfan He, Xinyue Liu, Lingdi Kong, Pengfei Zhao, Jinjun Rao, Jinbo Chen, Lingjun Meng, Zhiming Wang, Mei Liu
Summary: We explored the electrical activity and extremes inside individual suspended ZnO nanowires and observed high electrical resistivity and electron density. We also discovered thermal breakdown due to Joule heating and investigated the temperature distribution and thermal conductance. This work provides valuable insights into the potential and limitations of suspended NWs in high-performance nanodevices.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Polymer Science
Marco Bontempi, Rosario Capozza, Andrea Visani, Milena Fini, Gianluca Giavaresi, Alessandro Gambardella
Summary: In this study, the near-surface elasticity of semicrystalline polyether ether ketone (PEEK) at room temperature was quantitatively mapped using a standard atomic force microscopy setup in nanoindentation mode. Two localized moduli distributions were observed at approximately 0.6 and 0.9 GPa below the plastic threshold of the polymer, at indentation loads ranging from 120-450 nN. The localization of the amorphous and crystalline phases on the free surface of the polymer was detected with unprecedented detail. This study provides insights into quantitatively characterizing complex biopolymer systems on the nanoscale and guiding the optimal design of micro- and nanostructures for advanced biomedical applications.
Review
Polymer Science
Sreejita Ghosh, Dibyajit Lahiri, Moupriya Nag, Ankita Dey, Tanmay Sarkar, Sushil Kumar Pathak, Hisham Atan Edinur, Siddhartha Pati, Rina Rani Ray
Summary: Bacteria are major cell factories that can convert nitrogen and carbon sources into various biopolymers, with important medicinal applications and roles in pathogenicity.
Article
Polymer Science
Anita Kwasniewska, Michal Swietlicki, Adam Proszynski, Grzegorz Gladyszewski
Summary: The study demonstrates that additives have a significant impact on the mechanical and surface properties of starch films, with increasing kaolin content resulting in higher modulus and adhesion force, as well as increased surface roughness parameters.
Article
Construction & Building Technology
Hannah Porter, Joshua Blake, Navdeep Kaur Dhami, Abhijit Mukherjee
CEMENT & CONCRETE COMPOSITES
(2018)
Article
Microbiology
Navdeep K. Dhami, Abhijit Mukherjee, Elizabeth L. J. Watkin
FRONTIERS IN MICROBIOLOGY
(2018)
Article
Construction & Building Technology
Abhijit Mistri, Sriman Kumar Bhattacharyya, Navdeep Dhami, Abhijit Mukherjee, Sudhirkumar Barai
CONSTRUCTION AND BUILDING MATERIALS
(2019)
Article
Biotechnology & Applied Microbiology
Asha Latha Ramachandran, Pelin Polat, Abhijit Mukherjee, Navdeep K. Dhami
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2020)
Review
Construction & Building Technology
Abhijit Mistri, Sriman Kumar Bhattacharyya, Navdeep Dhami, Abhijit Mukherjee, Sudhirkumar V. Barai
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Construction & Building Technology
Nimrat Pal Kaur, Subhra Majhi, Navdeep Kaur Dhami, Abhijit Mukherjee
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Engineering, Environmental
Abhijit Mistri, Navdeep Dhami, Sriman Kumar Bhattacharyya, Sudhirkumar Barai, Abhijit Mukherjee, Wahidul K. Biswas
Summary: The use of bacterial cement and conventional cement slurry coating treatment on recycled coarse aggregates helps overcome shortcomings such as excessive water absorption, weak interfacial transition zone, and high porosity. Concrete with microbial carbonate precipitation (MCP) treated aggregate performs better than untreated recycled aggregate based concrete mixes, but marginally higher environmental impacts were observed due to additional emissions associated with the biocement treatment of RCA. Further environmental mitigation strategies are being considered to improve the environmental performance of concrete with MCP treated aggregates.
RESOURCES CONSERVATION AND RECYCLING
(2021)
Article
Environmental Sciences
Anant Aishwarya Dubey, K. Ravi, Mohamed A. Shahin, Navdeep K. Dhami, Abhijit Mukherjee
Summary: The study demonstrates that biocementation treatment can significantly reduce the erosion rate along riverbanks, but excessive cementation may lead to the formation of brittle chunks. The design of a bio-composite effectively mitigates current-induced erosion and reduces ammonia production.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Multidisciplinary Sciences
Raja Murugan, G. K. Suraishkumar, Abhijit Mukherjee, Navdeep K. Dhami
Summary: This study investigated the effect of native ureolytic microbial communities (NUMC) on MICP kinetics and biomineral properties in the presence and absence of S. pasteurii. The results showed that the biocementation potential of S. pasteurii is six times higher than NUMC, with S. pasteurii leading to smaller CaCO3 crystals and NUMC leading to larger CaCO3 crystals.
SCIENTIFIC REPORTS
(2021)
Article
Green & Sustainable Science & Technology
Hannah Porter, Abhijit Mukherjee, Rabin Tuladhar, Navdeep Kaur Dhami
Summary: Research has shown that different metabolic pathways of Microbially Induced Calcium Carbonate Precipitation (MICP) have significantly different environmental impacts, and the sustainability of engineered MICP is directly influenced by the metabolic pathways of bacteria and the purity of input chemicals. Some biotic processes are superior to the current industrial process for manufacturing calcium carbonate if laboratory-grade purity ingredients are replaced by industrial-grade products, and introducing industry by-products as nutrients may yield a greater dividend.
Article
Engineering, Environmental
Anant Aishwarya Dubey, Raja Murugan, K. Ravi, Abhijit Mukherjee, Navdeep K. Dhami
Summary: Biomediated soil improvement has emerged as a promising solution for enhancing soil engineering properties in the past decade. The efficacy of biocementation depends largely on the material properties of the precipitated crystals, which are influenced by the concentration of cementation reagents. In this study, specific microbes were investigated for their biocementation potential at different concentrations of cementation media (CM). The soil strength improvement was evaluated through a needle penetration test, and the biochemical properties of the microbes were analyzed to understand the reasons behind the variation in penetration resistance. The findings suggest that the concentration of CM plays a significant role in the response of microbes, and the morphology, texture, and quantity of precipitated CaCO3 crystals are important factors influencing the strength of the biocemented soil.
JOURNAL OF HAZARDOUS TOXIC AND RADIOACTIVE WASTE
(2022)
Article
Construction & Building Technology
Hannah Porter, Navdeep Kaur Dhami, Abhijit Mukherjee
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-CONSTRUCTION MATERIALS
(2018)
Article
Construction & Building Technology
Hannah Porter, Navdeep Kaur Dhami, Abhijit Mukherjee
CEMENT & CONCRETE COMPOSITES
(2017)
Review
Construction & Building Technology
Tahereh Noeiaghaei, Abhijit Mukherjee, Navdeep Dhami, So-Ryong Chae
CONSTRUCTION AND BUILDING MATERIALS
(2017)