concentration – TechConnect Briefs

Thorough Characterization of Liposomes by Complementary Light and X-Ray Scattering Techniques

Ragheb R., Bolze J., Taylor G., Tamaddoni N., Griffiths D., Nobbmann U., Malvern Panalytical, US

Liposomes are spherical vesicles with an aqueous core enclosed by one or more phospholipid bilayers or lamellae and are frequently classified based on their size and number of bilayers [1]. They are often used in [...]

Rapid High Resolution Multi-Parameter Characterization of Liposome-Protein Complexes by Nanoparticle Tracking Analysis

Ragheb R., Esposito E., Griffiths D., Malvern Instruments, US

Aggregation of biological and synthetic materials is a source of tremendous concern, posing problems at various stages of discovery and formulation processes. The ability to identify and characterize aggregates is of broad utility, and experiments [...]

An optofluidic device for characterizing the effect of viscosity and density on mass transfer

Lapsley M.I., Nama N., Yazdi S., Huang T.J., Pennsylvania State University, US

In this study, we developed an optofluidic device for analyzing the mass transfer of materials in a microfluidic channel. This device uses refractometry to monitor concentration in contrast to typical methods which use florescent markers. [...]

Design of a Small, Battery-Operated Nanoparticle Sizer

Erickson K., Johnson J., Grose M., Kolb J., Morell S., Caldow R., TSI Incorporated, US

A small, portable nanoparticle sizer has been developed to provide an affordable method to measure nanoparticle size distributions. The new nanoparticle sizer incorporates a SMPS Spectrometer into a chassis that is <1 cu.ft. The instrument [...]

Improve of Photovoltaic Performance of Dye-sensitized Solar Cell by Concentrating Solar Energy

Kim Y-W., Cho E., Choi S.C., Choi S.C., Lee D.W., Pusan National University, KR

Dye-sensitized solar cell (DSSC) is extremely promising because it is made of low-cost materials and does not need elaborate apparatus to manufacture against the silicon solar cell. Accordingly, the DSSC is constantly researched globally. One [...]

Improve of Photovoltaic Performance of Dye-sensitized Solar Cell by Concentrating Solar Energy

Kim Y-W., Cho E., Choi S.C., Choi S.C., Lee D.W., Pusan National University, KR

Dye-sensitized solar cell (DSSC) is extremely promising because it is made of low-cost materials and does not need elaborate apparatus to manufacture against the silicon solar cell. Accordingly, the DSSC is constantly researched globally. One [...]

Counting and Sizing of Virus and Protein Aggregates by Nanoparticle Tracking Analysis (NTA)

Griffiths D., Hole P., Smith J., Malloy A., Carr B., NanoSight, US

A new analytical system is described which provides total particle count and high-resolution size measurements for biological structures such as virus and protein aggregates. This system builds on the Nanoparticle Tracking and Analysis (NTA) technique [...]

Ultrasonic Pulsed Doppler (USPD): A Novel Ultrasonic Method for Characterizing Suspensions of Nanoparticles

Africk S.A., Colton C.K., Prodyne Corp., US

This paper describes a novel means for particle characterization, the Ultrasonic Pulsed Doppler (USPD) system. This system uses a single transducer to measure ultrasonic backscatter from moving particles to perform measurements of particle concentration, size [...]

On the stability length of fluid/liquid interfaces sustained by microfabricated pillars

Berthier J., Man Tran Van, Jeanson H., Sarrut N., CEA-LETI, FR

We focus here on the transfer and concentration of macromolecules from a flowing carrier fluid to a storage liquid. These liquids are flowing in parallel channels, separated by interfaces sustained by micro-pillars. The two fluids [...]

DNA Extraction with Parallel Electrodes on Microfluidic System

Parng S.H., Shia T.K., Yang H.J., Kuo C.H., Microsystem Technology Common Laboratory, TW

DNA trapping was demonstrated between an electrical field across two parallel integrated electrodes on chip fabricated by the MEMS techniques. The method to release the trapped DNA molecules using reversed voltage control electrical field was [...]