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Your search keyword '"laboratory tool"' showing total 23 results
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23 results on '"laboratory tool"'

1. Improved Accuracy in Determining the Acceleration Due to Gravity in Free Fall Experiments Using Smartphones and Mechanical Switches.

Author

Harnsoongnoen, Supakorn, Srisai, Saksun, Kongkeaw, Pongsathorn, and Rakdee, Tidarat

Subjects
SCIENCE education, PHYSICS education, TIME measurements, GRAVITY, REFERENCE values
Abstract

This study presents an innovative methodology to augment the accuracy of gravitational acceleration (g) measurements in free fall experiments. Employing smartphones and integrating mechanical switches, our approach utilizes a built-in microphone for precise time measurements during the initiation of free fall. A meticulously designed mechanical switch controls the release of a steel sphere, triggering the timer upon the initiation of descent. Our experimental outcomes showcase a commendable congruence between the calculated g value and the locally accepted reference value, pinpointing g at 9.8274 ± 0.01 m/s2. A salient feature of our method is the utilization of the smartphone's onboard microphone sensor, offering superior convenience to conventional sensor-based methodologies that require additional equipment. Additionally, our study introduces the seamless integration of open-source software on smartphones, facilitating the direct display and analysis of sound parameters. This integration streamlines the experimental process, contributing to the ongoing endeavors aimed at enhancing accuracy in free fall experiments. Our findings underscore the potential of smartphones and mechanical switches as accessible and effective tools in advancing physics education and scientific investigations. [ABSTRACT FROM AUTHOR]

Published
2024
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2. Improved Accuracy in Determining the Acceleration Due to Gravity in Free Fall Experiments Using Smartphones and Mechanical Switches

Author

Supakorn Harnsoongnoen, Saksun Srisai, Pongsathorn Kongkeaw, and Tidarat Rakdee

Subjects
gravitational acceleration, free fall, acoustics, smartphone, laboratory tool, physics teaching, Technology, Engineering (General). Civil engineering (General), TA1-2040, Biology (General), QH301-705.5, Physics, QC1-999, Chemistry, QD1-999
Abstract

This study presents an innovative methodology to augment the accuracy of gravitational acceleration (g) measurements in free fall experiments. Employing smartphones and integrating mechanical switches, our approach utilizes a built-in microphone for precise time measurements during the initiation of free fall. A meticulously designed mechanical switch controls the release of a steel sphere, triggering the timer upon the initiation of descent. Our experimental outcomes showcase a commendable congruence between the calculated g value and the locally accepted reference value, pinpointing g at 9.8274 ± 0.01 m/s2. A salient feature of our method is the utilization of the smartphone’s onboard microphone sensor, offering superior convenience to conventional sensor-based methodologies that require additional equipment. Additionally, our study introduces the seamless integration of open-source software on smartphones, facilitating the direct display and analysis of sound parameters. This integration streamlines the experimental process, contributing to the ongoing endeavors aimed at enhancing accuracy in free fall experiments. Our findings underscore the potential of smartphones and mechanical switches as accessible and effective tools in advancing physics education and scientific investigations.

Published
2024
Full Text
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4. Brevibacillus as a biological tool: a short review.

Author

Panda, Amrita, Bisht, Satpal, DeMondal, Surajit, Senthil Kumar, N., Gurusubramanian, G., and Panigrahi, Ashok

Abstract

The significance of Brevibacillus has been documented scientifically in the published literature and commercially in heterologous recombinant protein catalogs. Brevibacillus is one of the most widespread genera of Gram-positive bacteria, recorded from the diverse environmental habitats. The high growth rate, better transformation efficiency by electroporation, availability of shuttle vectors, production of negligible amount of extracellular protease, and the constitutive expression of heterologous proteins make some strains of this genus excellent laboratory models. Regarding biotechnological applications, this genus continues to be a source of various enzymes of great biotechnological interest due to their ability to biodegrade low density polyethylene, ability to act as a candidate bio-control agent, and more recently acknowledged as a tool for the overexpression. This article reviews the properties of Brevibacillus spp. as better biological tools with varied applications. [ABSTRACT FROM AUTHOR]

Published
2014
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5. IMPLEMENTATION OF A LABORATORY TOOL FOR STUDYING MIXED-MODE CHAOTIC CIRCUIT.

Author

KILIÇ, RECAI and KARAUZ, BARIŞ

Subjects
*CHAOS theory, *SIMULATION methods & models, *ELECTRIC circuit analysis, *EXPERIMENTAL methods in education, *EXPERIMENTS
Abstract

Although many authors have prepared useful papers to illustrate the existence of chaos and to enhance the reader's understanding of chaos by using theoretical, simulation or experimental setups, any chaos-based laboratory work-board has not been designed or implemented for studying chaotic circuits and systems. We designed and implemented a laboratory tool for studying mixed-mode chaotic circuits. In this paper, we will introduce this versatile laboratory tool. [ABSTRACT FROM AUTHOR]

Published
2007
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6. Dried blood spots (DBS): a valuable tool for HIV surveillance in developing/tropical countries.

Author

Solomon, Sunil S., Solomon, Suniti, Rodriguez, Irma I., McGarvey, Stephen T., Ganesh, A. K., Thyagarajan, S. P., Mahajan, Anish P., and Mayer, Kenneth H.

Subjects
HIV, LABORATORY equipment & supplies, MEDICAL screening, VIRAL antibodies, HIV-positive persons, BLOOD testing, WESTERN immunoblotting, DIAGNOSIS of HIV infections, BLOOD collection, CLIMATOLOGY, COMPARATIVE studies, DEVELOPING countries, ENZYME-linked immunosorbent assay, HIV infections, RESEARCH methodology, MEDICAL cooperation, PUBLIC health surveillance, RESEARCH, TIME, EVALUATION research, AIDS serodiagnosis
Abstract

Dried blood spots (DBS) on filter paper have been used as a practical method of sample collection in sero-surveillance studies of numerous diseases. DBS may be particularly useful for HIV screening in remote areas, in which unrefrigerated transfer time to a laboratory may take a number of days. In this study, we evaluate the ability to detect human immunodeficiency virus (HIV) type-1 antibodies from DBS that have been subjected to a tropical climate in southern India for 6 days. DBS were prepared from blood samples of 59 known HIV-positive individuals and 30 known HIV-negative individuals. ELISA and Western blot results from DBS that were subjected to a mean temperature of 35.8 degrees C and humidity of 73% for 6 days had a sensitivity of 100% and 92%, respectively, and a specificity of 100% and 100%, respectively. Based on these findings, we conclude that DBS sampling could serve as a cost-effective and convenient tool for widespread HIV sero-surveillance in remote areas within tropical countries. [ABSTRACT FROM AUTHOR]

Published
2002
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7. Control software for the Multi-Channel Led starlight simulator

Author

Emanuele Pace, M. S. Erculiani, N. La Rocca, Luca Poletto, Riccardo Claudi, L. Cocola, E. Alei, Andrea Baruffolo, Bernardo Salasnich, Diego Barbisan, Nicola Trivellin, and ITA

Subjects
010504 meteorology & atmospheric sciences, Computer science, Stellar classification, 01 natural sciences, Software, Planet, 0103 physical sciences, Electronic, Optical and Magnetic Materials, Electrical and Electronic Engineering, 010303 astronomy & astrophysics, Simulation, 0105 earth and related environmental sciences, Graphical user interface, Atmosphere (unit), business.industry, Exoplanets, Applied Mathematics, control software, Condensed Matter Physics, Exoplanet, Starlight, laboratory tool, Electronic, Optical and Magnetic Materials, business, Host (network)
Abstract

We built a multi-channel led starlight simulator capable to reproduce the radiation of stars of F, G, K and M spectral types in the wavelength range 365-940 nm. This range overlaps the photosynthetic active interval allowing us to use the simulator for biological experiments under radiation and atmospheric conditions close as much as possible to those expected on extrasolar planets. The simulator is a laboratory tool which is part of the “Atmosphere in a Test Tube” project, aimed to study the photosynthetic efficiency of bacteria under alien environmental conditions and their possible impact on the atmosphere of the host planet. This paper describes the software developed to control the simulator. We begin by presenting a conceptual overview of the instruments and then illustrating the top-level requirements and the architecture of the control software. Finally, we give a description of the graphical user interface.

Published
2018

8. Making Sense of Autoantibodies in Cholestatic Liver Diseases

Author

Ana Lleo, Pietro Invernizzi, Simona Marzorati, Marzorati, S, Invernizzi, P, and Lleo, A

Subjects
0301 basic medicine, Cholangitis, Sclerosing, Biliary tree, Nuclear protein, Enzyme-Linked Immunosorbent Assay, Disease, Laboratory tool, Dihydrolipoyllysine-Residue Acetyltransferase, digestive system, Autoantigens, Primary sclerosing cholangitis, Autoimmune Diseases, Mitochondrial Proteins, 03 medical and health sciences, 0302 clinical medicine, Primary biliary cirrhosis, Autoantibody, Antigen, MED/12 - GASTROENTEROLOGIA, medicine, Humans, Clinical significance, Fluorescent Antibody Technique, Indirect, Immune mechanisms, Autoantibodies, Autoimmune disease, Hepatology, business.industry, Liver Cirrhosis, Biliary, medicine.disease, digestive system diseases, Cholestatic disease, Mitochondria, 030104 developmental biology, Antibodies, Antinuclear, Immunology, 030211 gastroenterology & hepatology, business
Abstract

Primary biliary cirrhosis (PBC) and primary sclerosing cholangitis (PSC) are the most common chronic cholestatic liver diseases (CLD) in adults and are associated with immune mechanisms. PBC is considered a model autoimmune disease, and more than 90% of patients present very specific autoantibodies against mitochondrial antigens. Whether PSC should be considered an autoimmune or merely immune-mediated disease is still under debate. This review addresses the clinical relevance of autoantibodies in CLD and their pathogenic mechanisms and illustrates the technology available for appropriate autoantibody detection.

Published
2016

9. Making Sense of Autoantibodies in Cholestatic Liver Diseases

Author

Marzorati, S, Invernizzi, P, Lleo, A, Marzorati, Simona, Invernizzi, Pietro, Lleo, Ana, Marzorati, S, Invernizzi, P, Lleo, A, Marzorati, Simona, Invernizzi, Pietro, and Lleo, Ana

Abstract

Primary biliary cirrhosis (PBC) and primary sclerosing cholangitis (PSC) are the most common chronic cholestatic liver diseases (CLD) in adults and are associated with immune mechanisms. PBC is considered a model autoimmune disease, and more than 90% of patients present very specific autoantibodies against mitochondrial antigens. Whether PSC should be considered an autoimmune or merely immune-mediated disease is still under debate. This review addresses the clinical relevance of autoantibodies in CLD and their pathogenic mechanisms and illustrates the technology available for appropriate autoantibody detection.

Published
2016

11. Síťový spínaný zdroj

Author

Patočka, Miroslav, Procházka, Petr, Folprecht, Martin, Patočka, Miroslav, Procházka, Petr, and Folprecht, Martin

Abstract

Tato práce se zabývá problematikou síťového spínaného zdroje. Cílem této práce je návrh, konstrukce a ověření funkčnosti spínaného zdroje, který bude sloužit jako laboratorní přípravek., This semestral thesis deals with issues of a switch mode power supply. The aim of this semestral thesis is the design, construction and testing of the switch mode power supply, which will be used as a laboratory tool.

12. Síťový spínaný zdroj

Author

Patočka, Miroslav, Martiš, Jan, Folprecht, Martin, Patočka, Miroslav, Martiš, Jan, and Folprecht, Martin

Abstract

Diplomová práce se zabývá popisem síťového spínaného zdroje. Cílem diplomové práce je návrh, konstrukce a ověření funkčnosti spínaného zdroje, který bude sloužit jako laboratorní přípravek., This master´s thesis describes switch mode power supply. The aim of this master´s thesis is the design and the construction of the switch mode power supply, which will be used as a laboratory tool.

13. Síťový spínaný zdroj

Author

Patočka, Miroslav, Procházka, Petr, Folprecht, Martin, Patočka, Miroslav, Procházka, Petr, and Folprecht, Martin

Abstract

Tato práce se zabývá problematikou síťového spínaného zdroje. Cílem této práce je návrh, konstrukce a ověření funkčnosti spínaného zdroje, který bude sloužit jako laboratorní přípravek., This semestral thesis deals with issues of a switch mode power supply. The aim of this semestral thesis is the design, construction and testing of the switch mode power supply, which will be used as a laboratory tool.

14. Síťový spínaný zdroj

Author

Patočka, Miroslav, Procházka, Petr, Folprecht, Martin, Patočka, Miroslav, Procházka, Petr, and Folprecht, Martin

Abstract

Tato práce se zabývá problematikou síťového spínaného zdroje. Cílem této práce je návrh, konstrukce a ověření funkčnosti spínaného zdroje, který bude sloužit jako laboratorní přípravek., This semestral thesis deals with issues of a switch mode power supply. The aim of this semestral thesis is the design, construction and testing of the switch mode power supply, which will be used as a laboratory tool.

15. Síťový spínaný zdroj

Author

Patočka, Miroslav, Procházka, Petr, Patočka, Miroslav, and Procházka, Petr

Abstract

Tato práce se zabývá problematikou síťového spínaného zdroje. Cílem této práce je návrh, konstrukce a ověření funkčnosti spínaného zdroje, který bude sloužit jako laboratorní přípravek., This semestral thesis deals with issues of a switch mode power supply. The aim of this semestral thesis is the design, construction and testing of the switch mode power supply, which will be used as a laboratory tool.

16. Síťový spínaný zdroj

Author

Patočka, Miroslav, Martiš, Jan, Patočka, Miroslav, and Martiš, Jan

Abstract

Diplomová práce se zabývá popisem síťového spínaného zdroje. Cílem diplomové práce je návrh, konstrukce a ověření funkčnosti spínaného zdroje, který bude sloužit jako laboratorní přípravek., This master´s thesis describes switch mode power supply. The aim of this master´s thesis is the design and the construction of the switch mode power supply, which will be used as a laboratory tool.

17. Síťový spínaný zdroj

Author

Patočka, Miroslav, Procházka, Petr, Patočka, Miroslav, and Procházka, Petr

Abstract

Tato práce se zabývá problematikou síťového spínaného zdroje. Cílem této práce je návrh, konstrukce a ověření funkčnosti spínaného zdroje, který bude sloužit jako laboratorní přípravek., This semestral thesis deals with issues of a switch mode power supply. The aim of this semestral thesis is the design, construction and testing of the switch mode power supply, which will be used as a laboratory tool.

18. Síťový spínaný zdroj

Author

Patočka, Miroslav, Procházka, Petr, Patočka, Miroslav, and Procházka, Petr

Abstract

Tato práce se zabývá problematikou síťového spínaného zdroje. Cílem této práce je návrh, konstrukce a ověření funkčnosti spínaného zdroje, který bude sloužit jako laboratorní přípravek., This semestral thesis deals with issues of a switch mode power supply. The aim of this semestral thesis is the design, construction and testing of the switch mode power supply, which will be used as a laboratory tool.

19. Síťový spínaný zdroj

Author

Patočka, Miroslav, Procházka, Petr, Patočka, Miroslav, and Procházka, Petr

Abstract

Tato práce se zabývá problematikou síťového spínaného zdroje. Cílem této práce je návrh, konstrukce a ověření funkčnosti spínaného zdroje, který bude sloužit jako laboratorní přípravek., This semestral thesis deals with issues of a switch mode power supply. The aim of this semestral thesis is the design, construction and testing of the switch mode power supply, which will be used as a laboratory tool.

20. Síťový spínaný zdroj

Author

Patočka, Miroslav, Martiš, Jan, Patočka, Miroslav, and Martiš, Jan

Abstract

Diplomová práce se zabývá popisem síťového spínaného zdroje. Cílem diplomové práce je návrh, konstrukce a ověření funkčnosti spínaného zdroje, který bude sloužit jako laboratorní přípravek., This master´s thesis describes switch mode power supply. The aim of this master´s thesis is the design and the construction of the switch mode power supply, which will be used as a laboratory tool.

21. Síťový spínaný zdroj

Author

Patočka, Miroslav, Martiš, Jan, Patočka, Miroslav, and Martiš, Jan

Abstract

Diplomová práce se zabývá popisem síťového spínaného zdroje. Cílem diplomové práce je návrh, konstrukce a ověření funkčnosti spínaného zdroje, který bude sloužit jako laboratorní přípravek., This master´s thesis describes switch mode power supply. The aim of this master´s thesis is the design and the construction of the switch mode power supply, which will be used as a laboratory tool.

22. Síťový spínaný zdroj

Author

Patočka, Miroslav, Procházka, Petr, Folprecht, Martin, Patočka, Miroslav, Procházka, Petr, and Folprecht, Martin

Abstract

Tato práce se zabývá problematikou síťového spínaného zdroje. Cílem této práce je návrh, konstrukce a ověření funkčnosti spínaného zdroje, který bude sloužit jako laboratorní přípravek., This semestral thesis deals with issues of a switch mode power supply. The aim of this semestral thesis is the design, construction and testing of the switch mode power supply, which will be used as a laboratory tool.

23. Síťový spínaný zdroj

Author

Patočka, Miroslav, Martiš, Jan, Folprecht, Martin, Patočka, Miroslav, Martiš, Jan, and Folprecht, Martin

Abstract

Diplomová práce se zabývá popisem síťového spínaného zdroje. Cílem diplomové práce je návrh, konstrukce a ověření funkčnosti spínaného zdroje, který bude sloužit jako laboratorní přípravek., This master´s thesis describes switch mode power supply. The aim of this master´s thesis is the design and the construction of the switch mode power supply, which will be used as a laboratory tool.

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