Article
Polymer Science
Atsushi Matsumoto, Chi Zhang, Frank Scheffold, Amy Q. Shen
Summary: The entanglement dynamics and viscoelasticity of polyelectrolyte solutions were studied, showing discrepancies between experimental measurements and Dobrynin's model predictions, indicating the influence of electrostatic interactions on the viscoelastic properties of polyelectrolyte solutions.
Article
Multidisciplinary Sciences
Hang Zhou, Yongli Ma
Summary: Recent experiments on sound waves in a unitary Fermi gas have revealed various transport properties of strongly interacting fermions. The study focused on the temperature regimes near and below the superfluid critical temperature Tc in the BCS-BEC crossover, presenting a Kubo-based microscopic calculation of thermal conductivity κ. The study found that the contributions of fermionic quasiparticles to thermal transport change with temperature, with κ dropping upon crossing the pseudogap temperature T and exhibiting different temperature dependence below Tc.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Applied
Preeti Suri, Swati A. Patel, Rajendra Prasad Chhabra
Summary: The falling ball method (FBM) is a well-established technique for measuring viscosity of Newtonian liquids. This study explores the possibility of extending its range of application to non-Newtonian systems. The theoretical scheme proposed here has been validated and compared with experimental results, showing good correspondence. The FBM can be used for shear-thinning and shear-thickening systems under certain Reynolds number conditions.
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
(2023)
Article
Chemistry, Applied
Preeti Suri, Swati A. Patel, Rajendra Prasad Chhabra
Summary: The falling ball method is a well-established technique for measuring the viscosity of Newtonian liquids, with potential applications in non-Newtonian systems. Theoretical results have been used to extract viscosity values and validate the theoretical scheme with experimental data.
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
(2022)
Article
Engineering, Chemical
Montgomery T. Shaw
Summary: The article discusses the challenge of finding the zero-shear-rate viscosity η(0) and introduces a method of extrapolating estimates using multiple equations. Through analysis of viscosity measurement data, a weighted average concept is proposed to improve data quality.
POLYMER ENGINEERING AND SCIENCE
(2021)
Article
Construction & Building Technology
Waleed Zeiada, Hanqi Liu, Ghazi G. G. Al-Khateeb, Abdallah Shanableh, Mufid Samarai
Summary: This study aimed to evaluate the applicability of three commonly used test methods for different types of asphalt binders. The results showed that the ZSV of neat asphalt binders could be accurately and reliably measured using each of the three test methods. However, for SBS-modified asphalt binders, only the shear rate sweep test was feasible for measuring the ZSV.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Hanqi Liu, Waleed Zeiada, Ghazi G. Al-Khateeb, Abdallah Shanableh, Mufid Samarai
Summary: The study aimed to develop an improved test method for determining the equiviscous temperature (EVT) of asphalt binders, identified deficiencies in the test method in CEN/TS 15324 (2008) and proposed a new test method based on zero shear viscosity (ZSV).
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2022)
Article
Chemistry, Physical
Darshna Hirpara, Brijesh Patel, Vishwajit Chavda, Arpita Desai, Sanjeev Kumar
Summary: The micellization and clouding phenomenon in the choline chloride-urea-water system were investigated using fluorescence spectroscopy. The physical properties of water and choline chloride in the system were determined, and the critical micelle concentration (CMC) of anionic surfactant SDS was measured. The cloud point (CP) data were analyzed and a clouding mechanism was proposed based on the competition between counter ions. The CP behavior was also studied in the presence of metal salts, and the system was suggested for metal extraction from waste streams.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Sergei A. Egorov
Summary: Mode-coupling theory is utilized to compute the nanoparticle diffusion coefficient in polymer solutions, showing agreement with molecular dynamics simulation data. The theory explains the effects of nanoparticle size, mass, and concentration on the diffusion coefficient and offers a microscopic interpretation of the nonmonotonic dependence of diffusion coefficient on nanoparticle concentration. Both size dependence and mass dependence indicate a significant breakdown of the Stokes-Einstein relation for the model.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Construction & Building Technology
Ali Almusawi, Burak Sengoz, Ali Topal
Summary: This paper explores alternative methods for estimating the mixing and compaction temperatures of warm mix asphalt and polymer modified bitumen mixtures, aiming to overcome potential damages caused by implementing the classic Equiviscous procedure. By evaluating different methods, the determined mixing and compaction temperatures were used to measure the mechanical properties of asphalt mixtures.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Biochemical Research Methods
Oskar E. Stroem, Jason P. Beech, Jonas O. Tegenfeldt
Summary: Regular patterns emerge in high-concentration DNA solutions in microfluidic pillars at low Reynolds numbers and high Deborah numbers. Interacting vortices between pillars lead to long-range traveling waves consisting of DNA. The position of the pillars in each unit cell plays a role in the formation of waves. Elastic effects are identified as central to the origin of these waves, and this research may contribute to improving sample processing in microfluidics and understanding viscoelastic mechanisms.
Article
Polymer Science
Lei Xu, Mingxiang Ju, Wentai Guo, Shengrui Yu
Summary: Researchers focus on the extensional rheological behaviors of Poly(vinylidene fluoride) (PVDF) solutions in the electrospinning process. The extensional viscosity of PVDF solutions is measured to understand the fluidic deformation in extension flows. An exponential model can be used to fit the measured values of uniaxial extensional viscosity at various extension rates, while a traditional power-law model is applicable to steady shear viscosity.
Article
Multidisciplinary Sciences
Mythreyi Unni, Shehaab Savliwala, Brittany D. Partain, Lorena Maldonado-Camargo, Qingteng Zhang, Suresh Narayanan, Eric M. Dufresne, Jan Ilavsky, Pawel Grybos, Anna Koziol, Piotr Maj, Robert Szczygiel, Kyle D. Allen, Carlos M. Rinaldi-Ramos
Summary: The diffusion behavior of polymer-coated inorganic nanoparticles in synovial fluid can be well described by the Stokes-Einstein relationship, with an effective medium viscosity much smaller than the macroscopic low shear viscosity of the fluid. The additional viscous dissipation in the effective medium viscosity is attributed to the presence of polymer segments, shedding light on the diffusive behavior of these nanoparticles in complex and crowded biological environments such as the joint.
Article
Polymer Science
Dejie Kong, Sourya Banik, Michael J. San Francisco, Megan Lee, Rae M. Robertson Anderson, Charles M. Schroeder, Gregory B. McKenna
Summary: Bulk rheology measurements on concentrated monodisperse ring-linear DNA mixtures are reported for the first time. The behavior of these mixtures is compared with that of pure linear DNA, highlighting the dominant role of linear chains in the dynamics and entanglement scaling of the blends.
Article
Mechanics
H. Dakhil, S. K. Basu, S. Steiner, Y. Gerlach, A. Soller, Sharadwata Pan, Natalie Germann, M. Leidenberger, B. Kappes, A. Wierschem
Summary: The study investigated buffered aqueous solutions of deoxyribonucleic acid isolated from bacteriophage lambda (lambda-DNA) at shear rates up to 10(5) s(-1) using a narrow-gap rheometer. The results showed that at high shear rates, viscosity levels off into an infinite-shear viscosity plateau. Additionally, normal-stress differences exhibited a power-law dependence on the shear rate close to previous findings at lower shear rates, but a stepwise change was observed beyond 10(4) s(-1) shear rates.
JOURNAL OF RHEOLOGY
(2021)
Review
Biochemistry & Molecular Biology
Chandra Has, Sharadwata Pan
Summary: Vesicle structures, primarily composed of bilayers, have diverse applications and have attracted attention in various scientific disciplines. This review comprehensively evaluates the thermodynamic and kinetic aspects of vesicle formation, focusing on the conditions and mechanisms.
JOURNAL OF LIPOSOME RESEARCH
(2021)
Article
Mechanics
Sharadwata Pan, Natalie Germann
Article
Genetics & Heredity
Jaya Srivastava, P. Sunthar, Petety V. Balaji
MICROBIAL GENOMICS
(2020)
Article
Engineering, Chemical
Sharadwata Pan, Sivatharushan Sivanathan, Gero Kiepe, Thomas Kiepe, Natalie Germann
Summary: This study explores the suitability of seven formulations for developing a green commercial lipstick model with vitamin D3, finding that the type of wax used significantly influences the lipstick characteristics. The combination of berry wax, candelilla wax, and carnauba wax is recommended as an effective base formulation for a lipstick supplemented with vitamin D3.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Review
Materials Science, Multidisciplinary
Jaison Jeevanandam, Michael K. Danquah, Sharadwata Pan
Summary: Dental implants, typically made of titanium and its alloys, are commonly used to replace damaged or irregular teeth. Recently, nanobiomaterials with plant origins have shown enhanced biocompatibility and antimicrobial efficacy, making them potential non-toxic candidates for dental implants.
FRONTIERS IN MATERIALS
(2021)
Review
Biotechnology & Applied Microbiology
Christian K. O. Dzuvor, Sharadwata Pan, Charles Amanze, Prosper Amuzu, Charles Asakiya, Francis Kubi
Summary: Moringa oleifera, commonly known as the drumstick tree, is a drought-tolerant and rapidly evolving plant, with high nutritional and therapeutic properties mainly attributed to its bioactive components in different parts, especially the seeds. The seeds have shown pharmacological potential and health benefits, including antimicrobial, anticancer, antidiabetic, antioxidant, antihypertensive, anti-inflammatory and cardioprotective properties. Further human/clinical studies are needed to fully understand the potential health benefits and safety issues of these functional ingredients.
CRITICAL REVIEWS IN BIOTECHNOLOGY
(2022)
Article
Mechanics
R. Kailasham, Rajarshi Chakrabarti, J. Ravi Prakash
Summary: In this study, a coarse-grained bead-spring-dashpot chain model with internal friction was solved numerically to obtain material functions in different flow conditions. Simulation results were compared with semi-analytical approximations, showing a decrease in prediction discrepancy with increasing number of beads. The inclusion of internal friction resulted in nonmonotonous variations of viscosity with shear rate.
JOURNAL OF RHEOLOGY
(2021)
Article
Mechanics
Aritra Santra, B. Duenweg, J. Ravi Prakash
Summary: A multiparticle Brownian dynamics simulation algorithm is used to describe the static behavior of associative polymer solutions considering pairwise excluded volume interactions. Predictions for the fractions of stickers bound by intrachain and interchain associations are obtained and validated by systematic comparison with scaling relations. The simulations confirm the predictions of scaling theory across a wide range of parameter values.
JOURNAL OF RHEOLOGY
(2021)
Review
Biotechnology & Applied Microbiology
Sharadwata Pan, Thomas B. Goudoulas, Jaison Jeevanandam, Kei Xian Tan, Shamik Chowdhury, Michael K. Danquah
Summary: The article discusses recent advances in the therapeutic applications of metal and metal oxide nanoparticles in skin and cosmetic applications, covering dermatological intrusions in treatment and the use of nanoparticles in cosmetics.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2021)
Article
Environmental Sciences
Lee Yi Wong, Sie Yon Lau, Sharadwata Pan, Man Kee Lam
Summary: The suitability and efficacy of 3D graphene and its derivatives as adsorbents in wastewater treatment have gained attention, with focus on their physicochemical properties and adsorption mechanisms. Emphasis is placed on the adsorptive removal of oil, including analysis of adsorption mechanisms, properties of the adsorbent, and effects of adsorption conditions on performance.
Article
Engineering, Biomedical
Deepika Malhotra, Sharadwata Pan, Lars Ruether, Gerrit Schlippe, Werner Voss, Natalie Germann
Summary: A custom-made technique was reported to synthesize process-convenient skin scaffolds by tuning the mechanical properties of hydrogels based on naturally occurring polysaccharides to match rheological properties of native human skins. Mechanical parameters were studied using oscillatory shear rheology, showing significant findings on the influence of kappa-carrageenan concentration on the elastic modulus and intercycle strain-softening behavior of the hydrogels. Diffusion experiments on caffeine permeation attributes demonstrated improved barrier features with increasing kappa-carrageenan concentration, achieving comparable penetration features with commercial 3D skin models.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2021)
Article
Biophysics
Kiran Kumari, J. Ravi Prakash, Ranjith Padinhateeri
Summary: Chromatin is highly dynamic and shows cell-to-cell variability, playing a crucial role in gene regulation and DNA replication. By deriving interaction-strength parameters from experimental data, the organization and dynamics of chromatin can be predicted. Heterogeneous weak interactions are found to be crucial in determining the organization of chromatin domains.
BIOPHYSICAL JOURNAL
(2022)
Article
Polymer Science
Thomas B. Goudoulas, Anna Didonaki, Sharadwata Pan, Ehsan Fattahi, Thomas Becker
Summary: Hydrogels are versatile and widely used materials in various fields. Alginate and gelatin hydrogels are among the most common ones. The gelation mechanisms of alginate-Ca++ and gelatin are different. In this study, we prepared alginate-Ca++ hydrogels using individual layer gelation and analyzed their rheological behavior. We compared the results with gelatin-alginate hydrogels prepared ex situ. The strain-sweep patterns were similar, but the critical strain points were different, indicating differences in the microstructure at a molecular level.
Review
Materials Science, Biomaterials
Jaison Jeevanandam, Sharadwata Pan, Joao Rodrigues, M. Abd Elkodous, Michael K. Danquah
Summary: Biopolymer nanofibers have potential biomedical applications, but their instability and toxicity in biological fluids need to be addressed.
BIOMATERIALS SCIENCE
(2022)
Article
Chemistry, Physical
R. Kailasham, Rajarshi Chakrabarti, J. Ravi Prakash
Summary: The Rouse model with internal friction (RIF) is an approximate treatment based on preaveraging internal friction, while an exact coarse-grained model incorporating fluctuations in internal friction differs in predictions from RIF model, especially in shorter chain segments. The predictions for chain extension and viscosity in shear flow show qualitative differences between the two models, indicating variations in out-of-equilibrium conditions.
