Compact lensless digital counting system for fluorescent micro-reaction-chamber array

A gas reaction chamber has been designed and constructed for the JEM 7A transmission electron microscope which is based on a notably successful design by Hashimoto et. al. but which provides specimen tilting facilities of ± 15° aboutany axis in the plane of the specimen.It has been difficult to provide tilting facilities on environmental chambers for 100 kV microscopes owing to the fundamental lack of available space within the objective lens and the scope of structural investigations possible during dynamic experiments has been limited with previous specimen chambers not possessing this facility.A cross sectional diagram of the specimen chamber is shown in figure 1. The specimen is placed on a platinum ribbon which is mounted on a mica ring of the type shown in figure 2. The ribbon is heated by direct current, and a thermocouple junction spot welded to the section of the ribbon of reduced cross section enables temperature measurement at the point where localised heating occurs.

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Reconstruction of the Ancient Numeral System in Basque Language

Philology ◽

10.3726/phil042019.3 ◽

2019 ◽

Vol 4 (2018) ◽

pp. 157-172

Author(s):

FERNANDO GOMEZ-ACEDO ◽

ENEKO GOMEZ-ACEDO

Keyword(s):

Cardinal Number ◽

Counting System ◽

Cardinal Numbers ◽

Original Meaning ◽

Diachronic Development ◽

Insight Into

Abstract In this work a new insight into the reconstruction of the original forms of the first Basque cardinal numbers is presented and the identified original meaning of the names given to the numbers is shown. The method used is the internal reconstruction, using for the etymologies words that existed and still exist in Basque and other words reconstructed from the proto-Basque. As a result of this work it has been discovered that initially the numbers received their name according to a specific and logic procedure. According to this ancient method of designation, each cardinal number received its name based on the hand sign used to represent it, thus describing the position adopted by the fingers of the hand to represent each number. Finally, the different stages of numerical formation are shown, which demonstrate a long and diachronic development of the whole counting system.

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Design and Manufacturing of a Disposable, Cyclo-Olefin Copolymer, Microfluidic Device for a Biosensor †

Sensors ◽

10.3390/s19051178 ◽

2019 ◽

Vol 19 (5) ◽

pp. 1178 ◽

Cited By ~ 2

Author(s):

Jorge Prada ◽

Christina Cordes ◽

Carsten Harms ◽

Walter Lang

Keyword(s):

Microfluidic Device ◽

Heating Temperature ◽

Low Cost ◽

Reaction Chamber ◽

Microfluidic System ◽

Heating Process ◽

Design And Manufacturing ◽

On Chip ◽

Working Parameters ◽

Auto Fluorescence

This contribution outlines the design and manufacturing of a microfluidic device implemented as a biosensor for retrieval and detection of bacteria RNA. The device is fully made of Cyclo-Olefin Copolymer (COC), which features low auto-fluorescence, biocompatibility and manufacturability by hot-embossing. The RNA retrieval was carried on after bacteria heat-lysis by an on-chip micro-heater, whose function was characterized at different working parameters. Carbon resistive temperature sensors were tested, characterized and printed on the biochip sealing film to monitor the heating process. Off-chip and on-chip processed RNA were hybridized with capture probes on the reaction chamber surface and identification was achieved by detection of fluorescence tags. The application of the mentioned techniques and materials proved to allow the development of low-cost, disposable albeit multi-functional microfluidic system, performing heating, temperature sensing and chemical reaction processes in the same device. By proving its effectiveness, this device contributes a reference to show the integration potential of fully thermoplastic devices in biosensor systems.

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Biogas Dry Reforming for Hydrogen through Membrane Reactor Utilizing Negative Pressure

Fuels ◽

10.3390/fuels2020012 ◽

2021 ◽

Vol 2 (2) ◽

pp. 194-209

Author(s):

Akira Nishimura ◽

Tomohiro Takada ◽

Satoshi Ohata ◽

Mohan Lal Kolhe

Keyword(s):

Energy Source ◽

Reaction Temperature ◽

Negative Pressure ◽

Membrane Reactor ◽

Reaction Chamber ◽

Dry Reforming ◽

Molar Ratio ◽

Effect Of Pressure ◽

The Impact

Biogas, consisting of CH4 and CO2, is a promising energy source and can be converted into H2 by a dry reforming reaction. In this study, a membrane reactor is adopted to promote the performance of biogas dry reforming. The aim of this study is to investigate the effect of pressure of sweep gas on a biogas dry reforming to get H2. The effect of molar ratio of supplied CH4:CO2 and reaction temperature is also investigated. It is observed that the impact of psweep on concentrations of CH4 and CO2 is small irrespective of reaction temperature. The concentrations of H2 and CO increase with an increase in reaction temperature t. The concentration of H2, at the outlet of the reaction chamber, reduces with a decrease in psweep. It is due to an increase in H2 extraction from the reaction chamber to the sweep chamber. The highest concentration of H2 is obtained in the case of the molar ratio of CH4:CO2 = 1:1. The concentration of CO is the highest in the case of the molar ratio of CH4:CO2 = 1.5:1. The highest sweep effect is obtained at reaction temperature of 500 °C and psweep of 0.045 MPa.

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