LT – TechConnect Briefs

SEM Characterization of Adipose Tissue Structure

Brimiene V., Skaudzius R., Misevicius M., Brimas E., Brimas G., Brimas E., Brimas G., Kareiva A., Vilnius University, LT

In this work the scanning electron microscopy (SEM) was used for the characterization of adipose tissue samples taken from volunteer obese patients. The adipose tissue was taken from 3 layers of adipose tissue (subcutaneous, preperitoneal [...]

Dependence of the Energy of Electric Pulse Required to Electroporate the Cell on the Pulse Duration for Pulses from 50 ns to 500 ms

Saulis G., Bitinaitė A., Vytautas Magnus University, LT

To successfully implement the technology of food processing with pulsed electric fields (PEF), it is important to know what particular electric treatment (pulse duration, field strength, etc.) would require the minimum energy. Here, theoretical relationships [...]

Estimation of the Energetic Barrier to Pore Formation and the Pore Radius Corresponding to this Barrier for Different Cell Lines

Bitinaitė A., Saulis G., Vytautas Magnus University, LT

The permeability of the cell membrane can be modified by exposing of cells to high-voltage electric pulses leading to the formation of nanometer-sized pores in the cell membrane (electroporation or nanoporation). This phenomenon is widely [...]

Preparation of a new generation porous thermal insulation mass using functional nanomaterials

Ulbikas J., Boženko J., Spirova N., CJSC Modern E-Technologies, LT

In this work silica precursor is graft on nanomaterials via a free-radical reaction. The modified nanomaterials have an - OEt functional group which allows us to intercalate the polymer between the layers of expandable graphite [...]

Nanoporous Materials through Anodizing of Iron in F-containing Organic Electrolytes

Jagminas A., Mažeika K., Klimas V., State research institute Center of physical sciences and technology, LT

In this brief review, our recent progress in fabrication, characterization and application of thick nanoporous iron anodic films in ethylene glycol and a novel dimethyl sulfoxide (DMSO) electrolyte containing some fluorides will be presented and [...]

Determination of the Electroporation Threshold for pulses from 95 ns to 20 us

Saulis G., Balevicius S., Saule R., Stankevic V., Zurauskiene N., Vytautas Magnus University, LT

The dependences of the fraction of electroporated mouse hepatoma MH-22A cells on the pulse intensity were obtained for the cells exposed to single square-wave electric pulses with the durations from 95 ns to 20 us. [...]

Analysis of the Relationships Between the Parameters of the Electric Pulse

Saulis G., Vytautas Magnus University, LT

Theoretical relationships between the parameters of the electric pulse which is necessary for the poration of the cell have been obtained. Analysis has been made for the square wave, exponential and sine wave ac electric [...]

Size of the Pores Created by an Electric Pulse: Microsecond vs Millisecond Pulses

Saulis G., Saule R., Vytautas Magnus University, LT

Modeling studies have revealed that the pulse of nanosecond-duration should create smaller pores than the pulse of micro-millisecond duration. It can be expected, that similar differences should also exist between the pore populations created by [...]

Self-Assembly of TPPS4 Porphyrin Molecules into Nanorods Investigated by TEM, AFM, STM and UV/VIS Spectroscopy

Snitka V., Rodaite R., Mizariene V., Kaunas University of Technology, LT

In this work the aggregates of the tetrakis(4-sulfonatophenyl)porphyrin (TPPS4) growth from solution on solid crystalline hydrophilic and hydrophobic substrates were investigated. The spatial structure of TPPS4 deposited on the surface was imaged using Transmission Electron [...]

Equation of p-n Junction for High Current Density Models of Transistor

Baskys A., Semiconductor Physics Institute, LT

The results of theoretical and experimental investigations of p-n junction at junction voltages close to the potential barrier are presented. It is shown that in such a situation the voltage-current characteristic can be described by [...]