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Popescu, Lacramioara Mihaela
The direct conversion of the sunlight into electricity is the most elegant process to generate environmentally-friendly renewable energy. Plastic solar cells offer the prospect of flexible, lightweight, lower cost of manufacturing, and hopefully an efficient way to produce electricity from sunlight. Since the discovery of photo induced charge transfer from ...
Ly, Mai Thanh, Graduate ...
Problem investigated: Chronic wounds are not only a major burden to the patient arising from general pain and discomfort but also generate economic costs to both these individuals and the health care system. Various electrical stimulation regimes have been employed to study the effects of electrical stimulation on wound healing ...
Cho, S.
Non-invasive single cell analyses are increasingly required for the medical diagnostics of test substances or the development of drugs and therapies on the single cell level. For the non-invasive characterisation of cells, impedance spectroscopy which provides the frequency dependent electrical properties has been used. Recently, microfludic systems have been investigated ...
Maercker, C.
A big demand exists for high-throughput functional in vitro assays which can measure cellular phenotypes by molecular methods and therefore improve the resources of primary cells for cell therapy, tissue engineering and high-content screenings in drug development. This approach focuses on cellular adhesion which is an important differentiation process during ...
Jäger, M.
In parallel to recent progress of high-content analysis in cell biology, negative dielectrophoresis (nDEP) has continuously evolved as a potent tool for contact-free manipulation and investigation of single cells. As such, it can be especially beneficial for the handling of rare and valuable cells, e. g. in stem cell research, ...
Kellner, M.
Since the 1990s KERAFOL - Keramische Folien GmbH is developing zirconia based ceramic tapes and sintered substrates for Electrolyte Supported Cells (ESC). Together with Fraunhofer Institute for Ceramic Technologies and Systems (IKTS) in Dresden investigations and developments had taken place to improve the properties of the ESC. The result of ...
Diethelm, Stefan
Planar SOFC stack technology based on a unique concept (SOFConnex™) uses structured gas distribution layers between unprofiled metal sheet interconnects and thin Ni-YSZ anode supported electrolyte cells. The layers are flexible both in material and designand allow to implement new configurations relatively simply; manifolding can be internal, external, or combined. ...
Demierre, Nicolas
This thesis reports on the integration of continuous-flow cell separation method for lab-on-a-chip applications. Cell separation methods are widely used in biology to prepare samples prior to analysis. There is a need for a highly sensitive separation method that is capable to quickly isolate a particular cell type in a ...
Demierre, Nicolas
This paper reports on a novel method for on-chip continuous separation of divid- ing and non-dividing cells based on differences in their dielectric properties. By means of two opposite dielectrophoretic force fields at multiple frequencies, the two populations of cells flowing through the microfluidic device are focused towards distinct equilibrium ...
Raptis Leda - - 2008
Cultured adherent cells can be electroporated in situ, as they grow on a glass slide coated with electrically conductive, optically transparent indium-tin oxide (ITO). Although the introduction of DNA is a common use, the technique of electroporation in situ is valuable for studying many aspects of signal transduction. This is ...
Borgatti Monica - - 2008
The isolation of rare cells, such as fetal nucleated red blood cells and trophoblasts, from maternal blood for non-invasive prenatal diagnosis is a new field of research exhibiting several difficulties since this strategy requires unresolved basic technological protocols for a successful outcome. However, several achievements in the field of Laboratory-on-a-chip ...
Raptis Leda - - 2008
Electroporation was initially developed for the introduction of DNA into cells which grow in suspension and was performed in a cuvette with two flat electrodes on opposite sides. Different configurations were subsequently developed for the electroporation of adherent cells in situ, while the cells were growing on nonconductive surfaces or ...
Liu W - - 2008
Experiments using single cells are valuable for revealing individual cell behaviour, which is of interest to many biomedical researchers. In such experiments, various types of devices capable of aligning cells into organized arrays are often used. In this paper, we present a novel Single Cell Micro Array device that makes ...
Wei Yang - - 2008
The aim of this study is to investigate the effects of extremely low-frequency pulsed electromagnetic field (PEMF) on osteoblast-like cells. PEMF with a magnetic flux density of 1.55 mT at 48 Hz was employed to stimulate the MC3T3-E1 cell and the primary osteoblast cell derived from 2-day-old Sprague Dawley (SD) ...
Sugiura Tadao - - 2008
Nanomanipulation is a technology to manipulate a small object sized in nanometer to submicron scale. Optical tweezers is one of nanomanipulation techniques, which can investigate pico-newton to femto-newton force exerted on microscopic objects. We have developed a cell palpation system by use of optical tweezers and performed palpation experiments on ...
Yang Liju - - 2008
Dielectrophoresis (DEP) has been regarded as a useful tool for manipulating biological cells prior to the detection of cells. Since DEP uses high AC electrical fields, it is important to examine whether these electrical fields in any way damage cells or affect their characteristics in subsequent analytical procedures. In this ...
Al Kindi Adil - - 2008
Experimental and clinical studies have proven the feasibility of cellular cardiomyoplasty in treating the damaged myocardium following ischemic injury. Over the years, this field has exploded with different investigators trying different routes of cell delivery ranging from direct cell injection into the heart to peripheral intravenous delivery utilizing the various ...
Machado David J - - 2008
Single-cell amperometry is a powerful tool for the study of the mechanisms underlying secretion from cells that release electrochemically active substances like catecholamines, histamine, or serotonin. Amperometry has changed our view of the secretory process and the quantal release phenomenon. Today, it is a relatively easy technique to set up ...
Prakash Somashekar Bangalore - - 2008
We report a novel technique for assessing cell proliferation that employs integrated capacitance sensors for monitoring the growth of anchorage-dependent living cells. The sensors measure substrate coupling capacitances of cells cultured on-chip in a standard in vitro environment. The biophysical phenomenon underlying the capacitive behavior of cells is the counterionic ...
Feili Dara - - 2008
Organic field effect transistors can be integrated into micromachined polyimide-based neural stimulation electrode arrays in order to build active switching matrices. With this approach, a matrix of N x M electrode contacts requires only N + M interconnects to a stimulator when active switching elements are used instead of N ...
Mathis B J - - 2008
The search for microorganisms that are capable of catalyzing the reduction of an electrode within a fuel cell has primarily been focused on bacteria that operate mesobiotically. Bacteria that function optimally under extreme conditions are beginning to be examined because they may serve as more effective catalysts (higher activity, greater ...
Boettcher Michael - - 2008
We present a simple lab-on-chip device for handling small samples of delicate cells, e.g. stem cells. It uses a combination of sedimentation and dielectrophoresis. The transport of cells is driven by gravitation. Dielectrophoresis uses radio-frequency electric fields for generating particle-selective forces dependent on size and polarisability. Electrodes along the channels ...
Asphahani Fareid - - 2008
Impedance measurements of cell-based sensors are a primary characterization route for detection and analysis of cellular responses to chemical and biological agents in real time. The detection sensitivity and limitation depend on sensor impedance characteristics and thus on cell patterning techniques. This study introduces a cell patterning approach to bind ...
Takahashi, Kohshin
Although a Al/H2tpp (5, 10, 15, 20-tetraphenylporphyrin) Schottky-barrier cell did not show a clear rectification property because of the large electric resistance of the H2tpp solid, the rectification property was remarkably improved when o-chloranil was added into the H2tpp solid. The short-circuit dark-current was observed for the Al/dye cells with ...
Duriseti, Vishal
Monitoring of grinding operations in tumbling mills has been the focus of research for several decades. Charge motion and the breakage field that determine the efficiency of grinding are determined indirectly. An instrumented load cell package that can measure the force of impacts inside the grinding chamber of a mill ...
Liu Yan-Jun - - 2007
An integrated smart microfluidic device consisting of nickel micropillars, microvalves, and microchannels was developed for specific capture and sorting of cells. A regular hexagonal array of nickel micropillars was integrated on the bottom of a microchannel by standard photolithography, which can generate strong induced magnetic field gradients under an external ...
Huh Yun Suk - - 2007
A microfluidic cell lysis chip equipped with a micromixer and SPE unit was developed and used for quantitative analysis of intracellular proteins. This miniaturized sample preparation system can be employed for any purpose where cell disruption is needed to obtain intracellular constituents for the subsequent analysis. This system comprises a ...
Torchilin Vladimir P - - 2008
Cell-penetrating peptides (CPPs) including TAT peptide (TATp) have been successfully used for intracellular delivery of a broad variety of cargoes including various nanoparticulate pharmaceutical carriers (liposomes, micelles, nanoparticles). Here, we will consider the main results in this area, with a special emphasis on TATp-mediated delivery of liposomes and DNA. We ...
Calì Corrado - - 2008
Electrical synapses continuously transfer signals bi-directionally from one cell to another, directly or indirectly via intermediate cells. Electrical synapses are common in many brain structures such as the inferior olive, the subcoeruleus nucleus and the neocortex, between neurons and between glial cells. In the cortex, interneurons have been shown to ...
Xu Chun - - 2008
Dental magnetic attachments, usually applied locally to oral cavities, produce stray fields (flux leakage) spreading in adjacent tissues. It has been found that human periodontal ligament (PDL) cells change their geometry and the structure of their cytoskeleton F-actins when the cell cultures are exposed to B-field strengths of B = ...
Liu, Xiaowei
In view of micro fuel cells, the silicon processes are employed for microfabrication of the micro direct methanol fuel cell (µDMFC). Using the MEMS technology we have successfully made single µDMFC as small as 10mm×8mm×3mm. The main reason for the use of MEMS processes is the prospective potential for miniaturization ...
Moisescu Mihaela G - - 2008
Studying cell behaviour under irradiation with radiofrequency electromagnetic fields (RF-EMF) is often impeded by the difficulty to monitor cell characteristics during irradiation. Here we report the design and the application of a complete device for continuous microscopic observation of cells exposed to modulated EMF similar to mobile phones signals. The ...
Pinkerton, Thad Marshall 1975-
Half-cell potential testing has been recommended as a non-destructive method for assessing the corrosion potential of reinforcing steel in concrete bridge decks. The technique is particularly useful because it can be utilized to evaluate the probability of corrosion before damage is evident at the surface of a bridge deck. The ...
Lanthier Martin - - 2008
Shewanella oneidensis MR-1 grew for over 50 days in microbial fuel cells, incompletely oxidizing lactate to acetate with high recovery of the electrons derived from this reaction as electricity. Electricity was produced with lactate or hydrogen and current was comparable to that of electricigens which completely oxidize organic substrates. However, ...
Hunt Thomas P - - 2008
We present an integrated circuit/microfluidic chip that traps and moves individual living biological cells and chemical droplets along programmable paths using dielectrophoresis (DEP). Our chip combines the biocompatibility of microfluidics with the programmability and complexity of integrated circuits (ICs). The chip is capable of simultaneously and independently controlling the location ...
Finkelstein Erik I - - 2007
Galvanotaxis, that is, migration induced by DC electric fields, is thought to play a significant role in development and wound healing, however, the mechanisms by which extrinsic electric fields orchestrate intrinsic motility responses are unknown. Using mammalian cell lines (3T3, HeLa, and CHO cells), we tested one prevailing hypothesis, namely, ...
Parkesh Raman - - 2008
NAADP (nicotinic acid adenine dinucleotide phosphate) is a recently discovered second messenger, and as such, we have much yet to learn about its functions in health and disease. A bottleneck in this basic research is due to NAADP, like all second messengers, being charged to prevent it from leaking out ...
Ateh D D - - 2007
Polypyrrole (PPy) is a conducting polymer that may be electrochemically generated with the incorporation of any anionic species, including net-negatively charged biological molecules such as proteins and polysaccharides. In this article, dermatan and chloride-loaded PPy films were prepared on gold sputter-coated coverslips and various skin derived cells were studied on ...
Cho Young-Ho - - 2007
The paper presents a couple of biofluidic devices, whose functions are inspired from biological cell concentration and deformability monitoring functions. The cell concentration monitoring chip is inspired from RBC control mechanism in kidney, performing cell concentration monitoring functions. The cell deformability chip, inspired from selective RBC destruction mechanism in spleen, ...
Schwenzer Nina F - - 2007
PURPOSE: To evaluate the effects of the static magnetic field and typical imaging sequences of a high-field magnetic resonance scanner (3 Tesla) on the induction of double-strand breaks (DSBs) in two different human cell lines. MATERIALS AND METHODS: Human promyelocytic leukemia cells (HL-60) and human acute myeloid leukemia cells (KG-1a) ...
Ino Kosuke - - 2008
In order to understand the behavior of individual cells, single cell analyses have attracted attention since most cell-based assays provide data with values averaged across a large number of cells. Techniques for the manipulation and analysis of single cells are crucial for understanding the behavior of individual cells. In the ...
Saunders Rachel E - - 2008
A piezoelectric actuated, drop-on-demand inkjet printing system has been used to deliver suspensions of human fibroblast cells from a well-characterized cell line (HT 1080) in order to investigate the behaviour of cells exposed to the mechanical and fluid stresses associated with the printing process. By varying the amplitude and rise ...
Hoshino Akiyoshi - - 2007
Magnetic particles have been used widely in both biotechnological and medical fields, including for immunoassay, enzyme immobilization, drug transport, and immunological diagnosis. Especially particles with bioactive molecules such as antibodies and streptavidin are very useful tools for cell separation. Here we report affinity selection of neutrophils and macrophages from peritoneal ...
Yang Liju - - 2008
In this study, we present a new, simple and rapid impedance method to detect bacterial cells by making use of the impedance properties of bacterial cell suspensions using interdigitated microelectrodes. It was found that bacterial cell suspensions in deionized (DI) water with different cell concentrations could generate different electrical impedance ...
Frech, Roger
We developed an in situ IR transmission electrochemical cell, which was initially used to study lithium intercalation in a phospho-olivine LixFePO4 cathode. We had previously characterized vibrational spectrum of this material as part of a preliminary study. The transition between LiFePO4 and FePO4 could easily be followed in the in ...
Chung Chiung-Yin - - 2007
INTRODUCTION: Most cardiac arrhythmias are associated with pathology-triggered ion channel remodeling. However, multicellular effects, for example, exaggerated anisotropy and altered cell-to-cell coupling, can also indirectly affect action potential morphology and electrical stability via changed electrotonus. These changes are particularly relevant in structural heart disease, including hypertrophy and infarction. Recent computational ...
Ito Akira - - 2007
Micropatterning of target cells is highly desired for tissue engineering and cell biology. Although recent progress in surface chemistry has enabled the spatial control of cell adhesion onto substrates, conventional methods usually require specialized devices and time-consuming processes to fabricate the substrate. In this study, we demonstrate a simple and ...
Pu Jin - - 2007
The mechanisms by which cancer cells migrate to metastasise are not fully understood. Breast cancers are accompanied by electrical depolarisation of tumour epithelial cells. The electrical changes can be detected on the skin and are used to differentiate malignant from benign breast tumours. Could the electrical signals play a role ...
Jang Ling-Sheng - - 2007
This work presents a microfluidic device to capture physically single cells within microstructures inside a channel and to measure the impedance of a single HeLa cell (human cervical epithelioid carcinoma) using impedance spectroscopy. The device includes a glass substrate with electrodes and a PDMS channel with micro pillars. The commercial ...
Lovelady D C - - 2007
Since 1984, electric cell-substrate impedance sensing (ECIS) has been used to monitor cell behavior in tissue culture and has proven sensitive to cell morphological changes and cell motility. We have taken ECIS measurements on several cultures of noncancerous and cancerous human ovarian surface epithelial cells. By analyzing the noise in ...
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