1
|
Lin YM, Shi JY, Yang GG. Endoplasmic reticulum targeted fluorescent probe for real-time monitoring the viscosity changes induced by calcium homeostasis disruption. Talanta 2024; 275:126173. [PMID: 38692051 DOI: 10.1016/j.talanta.2024.126173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 04/19/2024] [Accepted: 04/25/2024] [Indexed: 05/03/2024]
Abstract
The endoplasmic reticulum (ER) acts as the major storage site for calcium ions, which are messenger ions for intracellular signaling. Disruption of calcium ion homeostasis can significantly affect the viscosity, polarity and pH of the ER. However, it is still unclear the relationship between the viscosity changes in ER and the imbalance of calcium ion homeostasis. Herein, we developed a novel fluorescent probe, named TPA, for monitoring viscosity changes that specifically targets the endoplasmic reticulum rather than mitochondria or lysosomes. TPA probe displayed good stability, as well as high responsiveness and selectivity to viscosity. The fluorescence intensity of TPA was significantly enhanced with the increased concentration or incubation time of the stimulating agents(i.e., tunicamycin), showing high responsiveness to the viscosity changes in ER. Furthermore, the TPA probe successfully demonstrated that an increase in intracellular calcium ion concentration leads to an increase in ER viscosity, whereas a decrease in calcium ion concentration leads to a decrease viscosity in ER. Both in vitro and in vivo experiments demonstrated that TPA probe successfully detected the viscosity changes in ER, especially the effects of calcium ion homeostasis disruption on ER. Overall, the TPA probe represents an efficient method for studying the relationship between calcium ion homeostasis and ER viscosity.
Collapse
Affiliation(s)
- Ya Meng Lin
- Biochemical Engineering Research Center, Anhui University of Technology, Ma'anshan, Anhui, 243002, PR China; School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma'anshan, Anhui, 243002, PR China
| | - Jia Yi Shi
- Biochemical Engineering Research Center, Anhui University of Technology, Ma'anshan, Anhui, 243002, PR China; School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma'anshan, Anhui, 243002, PR China
| | - Gang-Gang Yang
- Biochemical Engineering Research Center, Anhui University of Technology, Ma'anshan, Anhui, 243002, PR China; School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma'anshan, Anhui, 243002, PR China.
| |
Collapse
|
2
|
Fromsejer R, Jensen ML, Zacate MO, Karner VL, Pecoraro VL, Hemmingsen L. Molecular Rotational Correlation Times and Nanoviscosity Determined by 111m Cd Perturbed Angular Correlation (PAC) of γ-rays Spectroscopy. Chemistry 2023; 29:e202203084. [PMID: 36453728 PMCID: PMC10108235 DOI: 10.1002/chem.202203084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 12/01/2022] [Accepted: 12/01/2022] [Indexed: 12/05/2022]
Abstract
The nanoviscosity experienced by molecules in solution may be determined through measurement of the molecular rotational correlation time, τc , for example, by fluorescence and NMR spectroscopy. With this work, we apply PAC spectroscopy to determine the rate of rotational diffusion, λ=1/τc , of a de novo designed protein, TRIL12AL16C, in solutions with viscosities, ξ, from 1.7 to 88 mPa⋅s. TRIL12AL16C was selected as molecular probe because it exhibits minimal effects due to intramolecular dynamics and static line broadening, allowing for exclusive elucidation of molecular rotational diffusion. Diffusion rates determined by PAC data agree well with literature data from fluorescence and NMR spectroscopy, and scales linearly with 1/ξ in agreement with the Stokes-Einstein-Debye model. PAC experiments require only trace amounts (∼1011 ) of probe nuclei and can be conducted over a broad range of sample temperatures and pressures. Moreover, most materials are relatively transparent to γ-rays. Thus, PAC spectroscopy could find applications under circumstances where conventional techniques cannot be applied, spanning from the physics of liquids to in-vivo biochemistry.
Collapse
Affiliation(s)
- Rasmus Fromsejer
- Department of ChemistryUniversity of CopenhagenUniversitetsparken 52100KøbenhavnDenmark
| | - Marianne L. Jensen
- Niels Bohr InstituteUniversity of CopenhagenBlegdamsvej 172100KøbenhavnDenmark
| | - Matthew O. Zacate
- Department of PhysicsGeology and Engineering TechnologyNorthern Kentucky UniversityHighland HeightsKY 41099-1900USA
| | | | - Vincent L. Pecoraro
- Department of ChemistryWillard H. Dow LaboratoriesUniversity of Michigan930N. University Ave.Ann ArborMI 48109-1055USA
| | - Lars Hemmingsen
- Department of ChemistryUniversity of CopenhagenUniversitetsparken 52100KøbenhavnDenmark
| |
Collapse
|
3
|
Nie Y, Dai Z, Fozia, Zhao G, Jiang J, Xu X, Ying M, Wang Y, Hu Z, Xu H. Comparative Studies on DNA-Binding Mechanisms between Enantiomers of a Polypyridyl Ruthenium(II) Complex. J Phys Chem B 2022; 126:4787-4798. [PMID: 35731588 DOI: 10.1021/acs.jpcb.2c02104] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A pair of ruthenium(II) complex enantiomers, Δ- and Λ-[Ru(bpy)2MBIP]2+ (bpy = 2,2'-bipyridine, MBIP = 2-(3-bromophenyl)imidazo[5,6-f]phenanthroline), were designed, synthesized, and characterized. Comparative studies between the enantiomers on their binding behaviors to calf thymus DNA (CT-DNA) were conducted using UV-visible, fluorescence, and circular dichroism spectroscopies, viscosity measurements, isothermal titration calorimetry, a photocleavage experiment, and molecular simulation. The experimental results indicated that both the enantiomers spontaneously bound to CT-DNA through intercalation stabilized by the van der Waals force or the hydrogen bond and driven by enthalpy and that Δ-[Ru(bpy)2MBIP]2+ intercalated into DNA more deeply than Λ-[Ru(bpy)2MBIP]2+ did and exhibited a better DNA photocleavage ability. Molecular simulation further indicated that Δ-[Ru(bpy)2MBIP]2+ more preferentially intercalated between the base pairs of CT-DNA to the major groove, and Λ-[Ru(bpy)2MBIP]2+ more favorably intercalated to the minor groove. These research findings should be very helpful to the understanding of the stereoselectivity mechanism of DNA-bindings of metal complexes, and be useful for the design of novel metal-complex-based antitumor drugs with higher efficacy and lower toxicity.
Collapse
Affiliation(s)
- Yanhong Nie
- Guangdong Technology Research Center for Marine Algal Bioengineering, Guangdong Provincial Key Laboratory for Plant Epigenetics, Shenzhen Engineering Laboratory for Marine Algal Biotechnology, Shenzhen Key Laboratory of Marine Bioresources and Ecology, Shenzhen Key Laboratory of Microbial Genetic Engineering, Longhua Innovation Institute for Biotechnology, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, P. R. China
| | - Zhongming Dai
- Shenzhen University General Hospital, Shenzhen 518060, P. R. China
| | - Fozia
- Guangdong Technology Research Center for Marine Algal Bioengineering, Guangdong Provincial Key Laboratory for Plant Epigenetics, Shenzhen Engineering Laboratory for Marine Algal Biotechnology, Shenzhen Key Laboratory of Marine Bioresources and Ecology, Shenzhen Key Laboratory of Microbial Genetic Engineering, Longhua Innovation Institute for Biotechnology, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, P. R. China.,China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, P. R. China
| | - Guangyao Zhao
- Guangdong Technology Research Center for Marine Algal Bioengineering, Guangdong Provincial Key Laboratory for Plant Epigenetics, Shenzhen Engineering Laboratory for Marine Algal Biotechnology, Shenzhen Key Laboratory of Marine Bioresources and Ecology, Shenzhen Key Laboratory of Microbial Genetic Engineering, Longhua Innovation Institute for Biotechnology, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, P. R. China
| | - Jianrong Jiang
- Guangdong Technology Research Center for Marine Algal Bioengineering, Guangdong Provincial Key Laboratory for Plant Epigenetics, Shenzhen Engineering Laboratory for Marine Algal Biotechnology, Shenzhen Key Laboratory of Marine Bioresources and Ecology, Shenzhen Key Laboratory of Microbial Genetic Engineering, Longhua Innovation Institute for Biotechnology, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, P. R. China
| | - Xu Xu
- Guangdong Technology Research Center for Marine Algal Bioengineering, Guangdong Provincial Key Laboratory for Plant Epigenetics, Shenzhen Engineering Laboratory for Marine Algal Biotechnology, Shenzhen Key Laboratory of Marine Bioresources and Ecology, Shenzhen Key Laboratory of Microbial Genetic Engineering, Longhua Innovation Institute for Biotechnology, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, P. R. China
| | - Ming Ying
- Guangdong Technology Research Center for Marine Algal Bioengineering, Guangdong Provincial Key Laboratory for Plant Epigenetics, Shenzhen Engineering Laboratory for Marine Algal Biotechnology, Shenzhen Key Laboratory of Marine Bioresources and Ecology, Shenzhen Key Laboratory of Microbial Genetic Engineering, Longhua Innovation Institute for Biotechnology, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, P. R. China
| | - Yu Wang
- Guangdong Technology Research Center for Marine Algal Bioengineering, Guangdong Provincial Key Laboratory for Plant Epigenetics, Shenzhen Engineering Laboratory for Marine Algal Biotechnology, Shenzhen Key Laboratory of Marine Bioresources and Ecology, Shenzhen Key Laboratory of Microbial Genetic Engineering, Longhua Innovation Institute for Biotechnology, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, P. R. China
| | - Zhangli Hu
- Guangdong Technology Research Center for Marine Algal Bioengineering, Guangdong Provincial Key Laboratory for Plant Epigenetics, Shenzhen Engineering Laboratory for Marine Algal Biotechnology, Shenzhen Key Laboratory of Marine Bioresources and Ecology, Shenzhen Key Laboratory of Microbial Genetic Engineering, Longhua Innovation Institute for Biotechnology, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, P. R. China.,Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, P. R. China
| | - Hong Xu
- Guangdong Technology Research Center for Marine Algal Bioengineering, Guangdong Provincial Key Laboratory for Plant Epigenetics, Shenzhen Engineering Laboratory for Marine Algal Biotechnology, Shenzhen Key Laboratory of Marine Bioresources and Ecology, Shenzhen Key Laboratory of Microbial Genetic Engineering, Longhua Innovation Institute for Biotechnology, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, P. R. China
| |
Collapse
|
4
|
Chaudhary K, Munjal P, Singh KP. Universal Stokes's nanomechanical viscometer. Sci Rep 2021; 11:14365. [PMID: 34257351 PMCID: PMC8277784 DOI: 10.1038/s41598-021-93729-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 06/25/2021] [Indexed: 11/26/2022] Open
Abstract
Although, many conventional approaches have been used to measure viscosity of fluids, most methods do not allow non-contact, rapid measurements on small sample volume and have universal applicability to all fluids. Here, we demonstrate a simple yet universal viscometer, as proposed by Stokes more than a century ago, exploiting damping of capillary waves generated electrically and probed optically with sub-nanoscale precision. Using a low electric field local actuation of fluids we generate quasi-monochromatic propagating capillary waves and employ a pair of single-lens based compact interferometers to measure attenuation of capillary waves in real-time. Our setup allows rapid measurement of viscosity of a wide variety of polar, non-polar, transparent, opaque, thin or thick fluids having viscosity values varying over four orders of magnitude from \documentclass[12pt]{minimal}
\usepackage{amsmath}
\usepackage{wasysym}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsbsy}
\usepackage{mathrsfs}
\usepackage{upgreek}
\setlength{\oddsidemargin}{-69pt}
\begin{document}$$10^{0}{-}10^{4}~\text{mPa} \, \text{s}$$\end{document}100-104mPas. Furthermore, we discuss two additional damping mechanisms for nanomechanical capillary waves caused by bottom friction and top nano-layer appearing in micro-litre droplets. Such self-stabilized droplets when coupled with precision interferometers form interesting microscopic platform for picomechanical optofluidics for fundamental, industrial and medical applications.
Collapse
Affiliation(s)
- Komal Chaudhary
- Department of Physical Sciences, Indian Institute of Science Education and Research, Mohali, Knowledge City, Sector 81, Manauli, 140306, India
| | - Pooja Munjal
- Department of Physical Sciences, Indian Institute of Science Education and Research, Mohali, Knowledge City, Sector 81, Manauli, 140306, India
| | - Kamal P Singh
- Department of Physical Sciences, Indian Institute of Science Education and Research, Mohali, Knowledge City, Sector 81, Manauli, 140306, India.
| |
Collapse
|
5
|
Roy P, Liu S, Dutcher CS. Droplet Interfacial Tensions and Phase Transitions Measured in Microfluidic Channels. Annu Rev Phys Chem 2021; 72:73-97. [PMID: 33607917 DOI: 10.1146/annurev-physchem-090419-105522] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Measurements of droplet phase and interfacial tension (IFT) are important in the fields of atmospheric aerosols and emulsion science. Bulk macroscale property measurements with similar constituents cannot capture the effect of microscopic length scales and highly curved surfaces on the transport characteristics and heterogeneous chemistry typical in these applications. Instead, microscale droplet measurements ensure properties are measured at the relevant length scale. With recent advances in microfluidics, customized multiphase fluid flows can be created in channels for the manipulation and observation of microscale droplets in an enclosed setting without the need for large and expensive control systems. In this review, we discuss the applications of different physical principles at the microscale and corresponding microfluidic approaches for the measurement of droplet phase state, viscosity, and IFT.
Collapse
Affiliation(s)
- Priyatanu Roy
- Department of Mechanical Engineering, University of Minnesota, Twin Cities, Minneapolis, Minnesota 55455, USA;
| | - Shihao Liu
- Department of Mechanical Engineering, University of Minnesota, Twin Cities, Minneapolis, Minnesota 55455, USA;
| | - Cari S Dutcher
- Department of Mechanical Engineering, University of Minnesota, Twin Cities, Minneapolis, Minnesota 55455, USA; .,Department of Chemical Engineering and Materials Science, University of Minnesota, Twin Cities, Minneapolis, Minnesota 55455, USA
| |
Collapse
|
6
|
Park S, Jung WH, Pittman M, Chen J, Chen Y. The Effects of Stiffness, Fluid Viscosity, and Geometry of Microenvironment in Homeostasis, Aging, and Diseases: A Brief Review. J Biomech Eng 2020; 142:100804. [PMID: 32803227 PMCID: PMC7477718 DOI: 10.1115/1.4048110] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 08/05/2020] [Indexed: 12/12/2022]
Abstract
Cells sense biophysical cues in the micro-environment and respond to the cues biochemically and biophysically. Proper responses from cells are critical to maintain the homeostasis in the body. Abnormal biophysical cues will cause pathological development in the cells; pathological or aging cells, on the other hand, can alter their micro-environment to become abnormal. In this minireview, we discuss four important biophysical cues of the micro-environment-stiffness, curvature, extracellular matrix (ECM) architecture and viscosity-in terms of their roles in health, aging, and diseases.
Collapse
Affiliation(s)
- Seungman Park
- Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD 21218; Center for Cell Dynamics, Johns Hopkins University, Baltimore, MD 21218; Institute for NanoBio Technology, Johns Hopkins University, Baltimore, MD 21218
| | - Wei-Hung Jung
- Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD 21218; Center for Cell Dynamics, Johns Hopkins University, Baltimore, MD 21218; Department of Mechanical Engineering, Institute for NanoBio Technology, Johns Hopkins University, Baltimore, MD 21218
| | - Matthew Pittman
- Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD 21218; Center for Cell Dynamics, Johns Hopkins University, Baltimore, MD 21218; Department of Mechanical Engineering, Institute for NanoBio Technology, Johns Hopkins University, Baltimore, MD 21218
| | - Junjie Chen
- Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD 21218; Center for Cell Dynamics, Johns Hopkins University, Baltimore, MD 21218; Department of Mechanical Engineering, Institute for NanoBio Technology, Johns Hopkins University, Baltimore, MD 21218
| | - Yun Chen
- Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD 21218; Center for Cell Dynamics, Johns Hopkins University, Baltimore, MD 21218; Department of Mechanical Engineering, Institute for NanoBio Technology, Johns Hopkins University, Baltimore, MD 21218
| |
Collapse
|
7
|
Sego TJ, Prideaux M, Sterner J, McCarthy BP, Li P, Bonewald LF, Ekser B, Tovar A, Jeshua Smith L. Computational fluid dynamic analysis of bioprinted self-supporting perfused tissue models. Biotechnol Bioeng 2019; 117:798-815. [PMID: 31788785 PMCID: PMC7015804 DOI: 10.1002/bit.27238] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 11/12/2019] [Accepted: 11/22/2019] [Indexed: 01/11/2023]
Abstract
Natural tissues are incorporated with vasculature, which is further integrated with a cardiovascular system responsible for driving perfusion of nutrient‐rich oxygenated blood through the vasculature to support cell metabolism within most cell‐dense tissues. Since scaffold‐free biofabricated tissues being developed into clinical implants, research models, and pharmaceutical testing platforms should similarly exhibit perfused tissue‐like structures, we generated a generalizable biofabrication method resulting in self‐supporting perfused (SSuPer) tissue constructs incorporated with perfusible microchannels and integrated with the modular FABRICA perfusion bioreactor. As proof of concept, we perfused an MLO‐A5 osteoblast‐based SSuPer tissue in the FABRICA. Although our resulting SSuPer tissue replicated vascularization and perfusion observed in situ, supported its own weight, and stained positively for mineral using Von Kossa staining, our in vitro results indicated that computational fluid dynamics (CFD) should be used to drive future construct design and flow application before further tissue biofabrication and perfusion. We built a CFD model of the SSuPer tissue integrated in the FABRICA and analyzed flow characteristics (net force, pressure distribution, shear stress, and oxygen distribution) through five SSuPer tissue microchannel patterns in two flow directions and at increasing flow rates. Important flow parameters include flow direction, fully developed flow, and tissue microchannel diameters matched and aligned with bioreactor flow channels. We observed that the SSuPer tissue platform is capable of providing direct perfusion to tissue constructs and proper culture conditions (oxygenation, with controllable shear and flow rates), indicating that our approach can be used to biofabricate tissue representing primary tissues and that we can model the system in silico.
Collapse
Affiliation(s)
- T J Sego
- Department of Intelligent Systems Engineering, Indiana University, Bloomington, Indiana
| | - Matthew Prideaux
- Indiana Center for Musculoskeletal Health, Indiana University, Indianapolis, Indiana.,Department of Anatomy and Cell Biology, Indiana University School of Medicine, Indianapolis, Indiana
| | - Jane Sterner
- Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, Indiana.,3D Bioprinting Core, Indiana University School of Medicine, Indianapolis, Indiana
| | - Brian Paul McCarthy
- Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, Indiana
| | - Ping Li
- Division of Transplant Surgery, Department of Surgery, Indiana University School of Medicine, Indianapolis, Indiana
| | - Lynda F Bonewald
- Indiana Center for Musculoskeletal Health, Indiana University, Indianapolis, Indiana.,Department of Anatomy and Cell Biology, Indiana University School of Medicine, Indianapolis, Indiana.,Department of Orthopaedic Surgery, Indiana University School of Medicine, Indianapolis, Indiana
| | - Burcin Ekser
- Division of Transplant Surgery, Department of Surgery, Indiana University School of Medicine, Indianapolis, Indiana
| | - Andres Tovar
- Department of Mechanical and Energy Engineering, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana
| | - Lester Jeshua Smith
- Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, Indiana.,3D Bioprinting Core, Indiana University School of Medicine, Indianapolis, Indiana
| |
Collapse
|
8
|
Chen CJ, Chen WL, Phong PH, Chuang HS. Investigation of Micro-volume Viscosity with Janus Microbeads Based on Rotational Brownian Motion. SENSORS 2019; 19:s19051217. [PMID: 30857368 PMCID: PMC6427369 DOI: 10.3390/s19051217] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 03/06/2019] [Accepted: 03/07/2019] [Indexed: 12/14/2022]
Abstract
Viscosity is an important property of liquids. A viscosity change of aqueous substances that deviates from their normal levels usually implies a compromise in quality due to degradation or microorganism proliferation. Monitoring of macro-scale viscosity can be simply realized by various conventional tools, such as rotational viscometers, capillary tubes, falling bodies, and so forth. Nevertheless, today, micro-volume viscosity measurement remains a challenging endeavor, resulting in rare, expensive, or difficult-to-obtain samples not very well studied. For this reason, a novel technique for micro-viscosity based on rotational Brownian motion is presented in this paper. Janus microbeads were made by coating fluorescent polystyrene beads with gold film. Taking advantage of the bead configuration of half gold/half fluorescence, the rotational Brownian signal was expressed in terms of blinking fluorescent intensity. The characteristic correlation time was derived from the blinking intensity of trace amounts of a selected medium over a certain time period, and results were correlated with viscosity. Given a volume of only 2 μL for each measurement, calibration of a series of glycerol–water mixtures (100%–1% (v/v) water content) yielded good agreement with the expected viscosity predictions over the range of 0.8–574.8 cP. Five common oil products, including lubricant oil, baby oil, food oil, olive oil, and motor oil, were further investigated to demonstrate the feasibility and practicability of the proposed technique. Data measured by the rotational Brownian motion-based diffusometer were comparable with those measured by a commercial rotational viscometer. The method also explicitly showed viscosity degradation after the oils were heated at a high temperature of over 100 °C for 10 min. Evaluation proved the proposed Janus microbead-enabled rotational diffusometric technique to be a promising approach for rapid and micro-scale viscosity measurement.
Collapse
Affiliation(s)
- Chun-Jui Chen
- Department of Biomedical Engineering, National Cheng Kung University, Tainan 701, Taiwan.
| | - Wei-Long Chen
- Department of Biomedical Engineering, National Cheng Kung University, Tainan 701, Taiwan.
| | - Pham Hong Phong
- Institute of Chemistry, Vietnam Academy of Science and Technology, Hanoi 1000, Vietnam.
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi 1000, Vietnam.
| | - Han-Sheng Chuang
- Department of Biomedical Engineering, National Cheng Kung University, Tainan 701, Taiwan.
- Medical Device Innovation Center, National Cheng Kung University, Tainan 701, Taiwan.
| |
Collapse
|
9
|
Sklodowska K, Debski PR, Michalski JA, Korczyk PM, Dolata M, Zajac M, Jakiela S. Simultaneous Measurement of Viscosity and Optical Density of Bacterial Growth and Death in a Microdroplet. MICROMACHINES 2018; 9:E251. [PMID: 30424184 PMCID: PMC6187717 DOI: 10.3390/mi9050251] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 05/17/2018] [Accepted: 05/18/2018] [Indexed: 02/07/2023]
Abstract
Herein, we describe a novel method for the assessment of droplet viscosity moving inside microfluidic channels. The method allows for the monitoring of the rate of the continuous growth of bacterial culture. It is based on the analysis of the hydrodynamic resistance of a droplet that is present in a microfluidic channel, which affects its motion. As a result, we were able to observe and quantify the change in the viscosity of the dispersed phase that is caused by the increasing population of interacting bacteria inside a size-limited system. The technique allows for finding the correlation between the viscosity of the medium with a bacterial culture and its optical density. These features, together with the high precision of the measurement, make our viscometer a promising tool for various experiments in the field of analytical chemistry and microbiology, where the rigorous control of the conditions of the reaction and the monitoring of the size of bacterial culture are vital.
Collapse
Affiliation(s)
- Karolina Sklodowska
- Department of Biophysics, Warsaw University of Life Sciences, 159 Nowoursynowska Street, 02776 Warsaw, Poland.
- Department of Plant Genetics, Breeding and Biotechnology, Warsaw University of Life Sciences, 159 Nowoursynowska Street, 02776 Warsaw, Poland.
| | - Pawel R Debski
- Department of Biophysics, Warsaw University of Life Sciences, 159 Nowoursynowska Street, 02776 Warsaw, Poland.
| | - Jacek A Michalski
- Faculty of Civil Engineering, Mechanics and Petrochemistry, Warsaw University of Technology, 17 Lukasiewicza Street, 09400 Plock, Poland.
| | - Piotr M Korczyk
- Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawinskiego 5B, 02106 Warsaw, Poland.
| | - Miroslaw Dolata
- Department of Econophysics and Physics Application, Warsaw University of Life Sciences, 159 Nowoursynowska Street, 02776 Warsaw, Poland.
| | - Miroslaw Zajac
- Department of Biophysics, Warsaw University of Life Sciences, 159 Nowoursynowska Street, 02776 Warsaw, Poland.
| | - Slawomir Jakiela
- Department of Biophysics, Warsaw University of Life Sciences, 159 Nowoursynowska Street, 02776 Warsaw, Poland.
| |
Collapse
|
10
|
Paiè P, Zandrini T, Vázquez RM, Osellame R, Bragheri F. Particle Manipulation by Optical Forces in Microfluidic Devices. MICROMACHINES 2018; 9:E200. [PMID: 30424133 PMCID: PMC6187572 DOI: 10.3390/mi9050200] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 04/18/2018] [Accepted: 04/20/2018] [Indexed: 01/09/2023]
Abstract
Since the pioneering work of Ashkin and coworkers, back in 1970, optical manipulation gained an increasing interest among the scientific community. Indeed, the advantages and the possibilities of this technique are unsubtle, allowing for the manipulation of small particles with a broad spectrum of dimensions (nanometers to micrometers size), with no physical contact and without affecting the sample viability. Thus, optical manipulation rapidly found a large set of applications in different fields, such as cell biology, biophysics, and genetics. Moreover, large benefits followed the combination of optical manipulation and microfluidic channels, adding to optical manipulation the advantages of microfluidics, such as a continuous sample replacement and therefore high throughput and automatic sample processing. In this work, we will discuss the state of the art of these optofluidic devices, where optical manipulation is used in combination with microfluidic devices. We will distinguish on the optical method implemented and three main categories will be presented and explored: (i) a single highly focused beam used to manipulate the sample, (ii) one or more diverging beams imping on the sample, or (iii) evanescent wave based manipulation.
Collapse
Affiliation(s)
- Petra Paiè
- Istituto di Fotonica e Nanotecnlogie IFN-CNR, Piazza Leonardo da Vinci 32, Milano 20133, Italy.
| | - Tommaso Zandrini
- Istituto di Fotonica e Nanotecnlogie IFN-CNR, Piazza Leonardo da Vinci 32, Milano 20133, Italy.
- Dipartimento di Chimica, Materiali e Ingegneria Chimica "Giulio Natta", Politecnico di Milano, Piazza Leonardo da Vinci 32, Milano 20133, Italy.
| | - Rebeca Martínez Vázquez
- Istituto di Fotonica e Nanotecnlogie IFN-CNR, Piazza Leonardo da Vinci 32, Milano 20133, Italy.
| | - Roberto Osellame
- Istituto di Fotonica e Nanotecnlogie IFN-CNR, Piazza Leonardo da Vinci 32, Milano 20133, Italy.
- Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, Milano 20133, Italy.
| | - Francesca Bragheri
- Istituto di Fotonica e Nanotecnlogie IFN-CNR, Piazza Leonardo da Vinci 32, Milano 20133, Italy.
| |
Collapse
|
11
|
Li W, Li N, Shen Y, Fu Z, Su H, Hu H. Dynamic analysis and rotation experiment of an optical-trapped microsphere in air. APPLIED OPTICS 2018; 57:823-828. [PMID: 29400746 DOI: 10.1364/ao.57.000823] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 01/01/2018] [Indexed: 06/07/2023]
Abstract
A dual-fiber optical trap system to trap and rotate a borosilicate microsphere has been proposed and experimentally demonstrated. The trapping system can be used as a probe to measure environmental parameters, such as torque, force, and viscosity of the surrounding medium. Under various conditions with different fiber misalignments, optical power, and fiber separation, the trapped sphere will exhibit three motion profiles including random oscillation, round rotation, and abnormal rotation. The power spectrum analysis method is used to measure rotation rates up to 385 Hz, which can be further increased by increasing laser power. In addition, simulation and experiment show consistent results in rotation rates and motion trajectory, which verifies the validity and accuracy of dynamic analysis.
Collapse
|