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67,601 results on '"MICROWAVE ovens"'

1. Microwave Ovens

Author

Catherine C. Finan and Catherine C. Finan

Subjects
Microwave ovens--History--Juvenile literature
Abstract

It's a quick way to heat up your food, but did you know the microwave oven was a mistake? Oops! Learn the story of how this accidental invention turned into a common household appliance. Simple text and fun photos prove we can create wonders from whoops-es!

Published
2023

2. Microwave Ovens

Author

Reed and Reed

Subjects
Microwave ovens--Juvenile literature
Abstract

Did you know the microwave oven was actually invented by mistake? While experimenting with electricity, a scientist noticed the chocolate snack he had in his pocket actually melted. This led to the technology that has made cooking faster, more convenient, and used more than conventional cooking. This book addresses the differences between a standard oven, which uses conduction, and a microwave oven, which uses microwaves, causing food molecules to move, creating heat. The more the molecules move, the hotter the food gets. So, pop in a snack, set the timer, and in a few seconds you'll be ready to enjoy! This book will allow students to plan and conduct an investigation to determine the effect of placing objects made with different materials in the path of a beam of light.

Published
2015

3. FDTD modeling and experimental verification of electromagnetic power dissipated in domestic microwave ovens.

Author

Kopyt, Paweł and Celuch-Marcysiak, Małgorzata

Subjects
TELECOMMUNICATION, FINITE differences, COMPUTATIONAL electromagnetics, MICROWAVES, ENGINEERING, MICROWAVE ovens
Abstract

The FDTD (Finite Difference Time Domain) method has proven to be effective in modeling high-frequency electromagnetic problems in telecommunications industry. Recently it has been successfully applied in microwave power engineering. In order to accurately model scenarios typical in this field one has to deal with the movement of objects placed inside cavities. This paper describes a simple algorithm that makes it possible to take into account object rotation -- important in simulations of domestic microwave ovens. Results of example simulations are presented and an experimental verification of the simulation tool is performed. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
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5. The microwave bacteriome: biodiversity of domestic and laboratory microwave ovens

Author

Alba Iglesias, Lorena Martínez, Daniel Torrent, and Manuel Porcar

Subjects
microwave, 16S rRNA gene sequencing, taxonomic classification, radiation, desiccation, selective pressure, Microbiology, QR1-502
Abstract

Microwaves have become an essential part of the modern kitchen, but their potential as a reservoir for bacterial colonization and the microbial composition within them remain largely unexplored. In this study, we investigated the bacterial communities in microwave ovens and compared the microbial composition of domestic microwaves, microwaves used in shared large spaces, and laboratory microwaves, using next-generation sequencing and culturing techniques. The microwave oven bacterial population was dominated by Proteobacteria, Firmicutes, Actinobacteria, and Bacteroidetes, similar to the bacterial composition of human skin. Comparison with other environments revealed that the bacterial composition of domestic microwaves was similar to that of kitchen surfaces, whereas laboratory microwaves had a higher abundance of taxa known for their ability to withstand microwave radiation, high temperatures and desiccation. These results suggest that different selective pressures, such as human contact, nutrient availability and radiation levels, may explain the differences observed between domestic and laboratory microwaves. Overall, this study provides valuable insights into microwave ovens bacterial communities and their potential biotechnological applications.

Published
2024
Full Text
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10. A Miniaturized Embedded Frequency Selective Surface‐Based EMI Shield for Microwave Ovens.

Author

Jayanandan, T. and Alex, Zachariah C.

Subjects
*FREQUENCY selective surfaces, *SUBSTRATES (Materials science), *ELECTROMAGNETIC shielding, *BOROSILICATES, *MICROWAVE ovens
Abstract

ABSTRACT This work presents a new miniaturized frequency selective surface (FSS) design to be employed as an electromagnetic (EM) shield in the 2.45 GHz (ISM band) range, with optically transparent glass substrate. A step‐by‐step procedure on the miniaturization technique and the corresponding frequency response is presented. The proposed FSS layout consists of an optimized square loop and a central reactive element consisting of meandered lines. The metal layout is embedded between borosilicate glass as substrate on top and bottom sides, achieving a final periodicity of 0.12λ. A miniaturization of 69.05% was achieved, and the equivalent circuit model was synthesized to understand the EM behavior of the proposed FSS design, and results were compared. The shielding effectiveness of 53.25 dB was achieved with polarization insensitivity for both TE and TM modes, and the angular stability was also studied. A prototype of the proposed work was fabricated, and the frequency characteristics were studied in the anechoic chamber setup. Ellipsometer setup was used to study the optical properties of prototype, and optical transparency of 81.8% was achieved. The measured and simulated results show close agreement and confirm the usability of the proposed FSS in glass‐based electromagnetic interference (EMI) shielding applications in ISM band. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
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11. The microwave bacteriome: biodiversity of domestic and laboratory microwave ovens.

Author

Iglesias, Alba, Martínez, Lorena, Torrent, Daniel, and Porcar, Manuel

Subjects
MICROWAVE ovens, COLONIZATION (Ecology), RADIATION pressure, BACTERIAL population, NUCLEOTIDE sequencing
Abstract

Microwaves have become an essential part of the modern kitchen, but their potential as a reservoir for bacterial colonization and the microbial composition within them remain largely unexplored. In this study, we investigated the bacterial communities in microwave ovens and compared the microbial composition of domestic microwaves, microwaves used in shared large spaces, and laboratory microwaves, using next-generation sequencing and culturing techniques. The microwave oven bacterial population was dominated by Proteobacteria, Firmicutes, Actinobacteria, and Bacteroidetes, similar to the bacterial composition of human skin. Comparison with other environments revealed that the bacterial composition of domestic microwaves was similar to that of kitchen surfaces, whereas laboratory microwaves had a higher abundance of taxa known for their ability to withstand microwave radiation, high temperatures and desiccation. These results suggest that different selective pressures, such as human contact, nutrient availability and radiation levels, may explain the differences observed between domestic and laboratory microwaves. Overall, this study provides valuable insights into microwave ovens bacterial communities and their potential biotechnological applications. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

14. NATIONAL AUTONOMOUS UNIVERSITY OF HONDURAS invites tenders for Microwave Ovens for Commercial Use - Digital Microwave of 1.1 Cubic Feet, Size (33 Height X 53.9 Width

Subjects
Microwave communications, News, opinion and commentary, National Autonomous University of Honduras
Abstract

NATIONAL AUTONOMOUS UNIVERSITY OF HONDURAS, Honduras has invited tenders for Microwave Ovens for Commercial Use - Digital Microwave of 1.1 Cubic Feet, Size (33 Height X 53.9 Width. Tender Notice [...]

Published
2024

17. MUNICIPAL MAYOR'S OFFICE OF EL PROGRESO invites tenders for Domestic Microwave Ovens - Please Purchase: 1 Digital Microwave. for Use in the Vip Kitchen of the Sports Palace Facilities. Applicant:Inmuprode

Subjects
Sports facilities, Microwave communications, Mayors, News, opinion and commentary
Abstract

MUNICIPAL MAYOR'S OFFICE OF EL PROGRESO, Honduras has invited tenders for Domestic Microwave Ovens - Please Purchase: 1 Digital Microwave. for Use in the Vip Kitchen of the Sports Palace [...]

Published
2024

21. NATIONAL REGISTER OF PERSONS invites tenders for Domestic Microwave Ovens - Acquisition of Eight (08) Digital Microwave: Stainless Steel Material, Medium Size, Gray or Black Color

Subjects
Steel, Stainless, Company acquisition/merger, News, opinion and commentary
Abstract

NATIONAL REGISTER OF PERSONS, Honduras has invited tenders for Domestic Microwave Ovens - Acquisition of Eight (08) Digital Microwave: Stainless Steel Material, Medium Size, Gray or Black Color.. Tender Notice [...]

Published
2024

23. NATIONAL ADMINISTRATION OF PUBLIC EDUCATION | CENTRAL BOARD OF DIRECTORS invites tenders for Supply of Microwave Ovens and Audio Equipment. it Must be Quoted Online According to the Specifications Established in the Attached File

Subjects
Boards of directors -- Reports, News, opinion and commentary
Abstract

NATIONAL ADMINISTRATION OF PUBLIC EDUCATION | CENTRAL BOARD OF DIRECTORS, Uruguay has invited tenders for Supply of Microwave Ovens and Audio Equipment. it Must be Quoted Online According to the [...]

Published
2024

28. NATIONAL UNIVERSITY OF FORESTRY SCIENCES invites tenders for Domestic Microwave Ovens - Microwave, Percolator for more Information, Email L.Machado@Unacifor.Edu.Hn

Subjects
Electronic mail systems, Forests and forestry, E-mail, News, opinion and commentary
Abstract

NATIONAL UNIVERSITY OF FORESTRY SCIENCES, Honduras has invited tenders for Domestic Microwave Ovens - Microwave, Percolator for more Information, Email L.Machado@Unacifor.Edu.Hn. Tender Notice No: UNACIFOR-CM-GC-DBE-045-JUN-34-2024 Deadline: June 18, 2024 Copyright [...]

Published
2024

29. NATIONAL UNIVERSITY OF FORESTRY SCIENCES invites tenders for Domestic Microwave Ovens - Dispenser, Microwave, Percolator, Stove for more Information, Email L.Machado@Unacifor.Edu.Hn

Subjects
Electronic mail systems, Heating -- Equipment and supplies, Forests and forestry, E-mail, News, opinion and commentary
Abstract

NATIONAL UNIVERSITY OF FORESTRY SCIENCES, Honduras has invited tenders for Domestic Microwave Ovens - Dispenser, Microwave, Percolator, Stove for more Information, Email L.Machado@Unacifor.Edu.Hn. Tender Notice No: UNACIFOR-CM-GC-DBE-046-JUN-32-2024 Deadline: June 18, [...]

Published
2024

32. NATIONAL REGISTER OF PERSONS invites tenders for Domestic Microwave Ovens - Acquisition of One (01) Digital Microwave: Stainless Steel Material, Medium Size, Gray or Black Color

Subjects
Steel, Stainless, Company acquisition/merger, News, opinion and commentary
Abstract

NATIONAL REGISTER OF PERSONS, Honduras has invited tenders for Domestic Microwave Ovens - Acquisition of One (01) Digital Microwave: Stainless Steel Material, Medium Size, Gray or Black Color. Tender Notice [...]

Published
2024

33. GOVERNMENT OF THE STATE OF RIO GRANDE DO NORTE invites tenders for Record Prices for Possible Acquisition of Microwave Ovens, Refrigerators, Coffee Makers, Fans, Water Fountains, Televisions and Footrests

Subjects
Company acquisition/merger, News, opinion and commentary
Abstract

GOVERNMENT OF THE STATE OF RIO GRANDE DO NORTE, Brazil has invited tenders for Record Prices for Possible Acquisition of Microwave Ovens, Refrigerators, Coffee Makers, Fans, Water Fountains, Televisions and [...]

Published
2024

35. NATIONAL UNIVERSITY OF FORESTRY SCIENCES invites tenders for Domestic Microwave Ovens - Purchase of Microwave for more Information Write to the Email: H.Pereira@Unacufor.Edu.Hn

Subjects
Electronic mail systems, Forests and forestry, E-mail, News, opinion and commentary
Abstract

NATIONAL UNIVERSITY OF FORESTRY SCIENCES, Honduras has invited tenders for Domestic Microwave Ovens - Purchase of Microwave for more Information Write to the Email: H.Pereira@Unacufor.Edu.Hn. Tender Notice No: UNACIFOR-CM-GC-VADM-31-MAYO-19-2024 Deadline: [...]

Published
2024

36. TECHNICAL INSTITUTE OF TRAINING AND PRODUCTIVITY -INTECAP- invites tenders for Direct Purchase No. C-5-2024, Purchase and Sale of Microwave Ovens, Destined for the Different Training Centers of the Institution

Subjects
Technical institutes, News, opinion and commentary
Abstract

TECHNICAL INSTITUTE OF TRAINING AND PRODUCTIVITY -INTECAP-, Guatemala has invited tenders for Direct Purchase No. C-5-2024, Purchase and Sale of Microwave Ovens, Destined for the Different Training Centers of the [...]

Published
2024

39. PUBLIC MINISTRY invites tenders for Domestic Microwave Ovens - Microwaves

Subjects
Microwaves, News, opinion and commentary
Abstract

PUBLIC MINISTRY, Honduras has invited tenders for Domestic Microwave Ovens - Microwaves. Tender Notice No: 1000014822 Deadline: May 2, 2024 Copyright © 2011-2022 pivotalsources.com. All rights reserved. Provided by SyndiGate [...]

Published
2024

40. CHERKASY MEDICAL ACADEMY invites tenders for Electric Kettle, Microwave Ovens

Subjects
News, opinion and commentary
Abstract

CHERKASY MEDICAL ACADEMY, Ukraine has invited tenders for Electric Kettle, Microwave Ovens. Tender Notice No: UA-2024-04-29-004882-a Deadline: May 7, 2024 Copyright © 2011-2022 pivotalsources.com. All rights reserved. Provided by SyndiGate [...]

Published
2024

42. STATE INSTITUTION CENTER FOR DISASTER MEDICINE OF THE MINISTRY OF EMERGENCIES OF THE REPUBLIC OF KAZAKHSTAN (CITY OF ASTANA) invites tenders for Repair Work for Microwave Ovens (According to Technical Specifications), Astana

Subjects
News, opinion and commentary
Abstract

STATE INSTITUTION CENTER FOR DISASTER MEDICINE OF THE MINISTRY OF EMERGENCIES OF THE REPUBLIC OF KAZAKHSTAN (CITY OF ASTANA), Kazakhstan has invited tenders for Repair Work for Microwave Ovens (According [...]

Published
2024

43. GOVERNMENT OF THE STATE OF ESPIRITO SANTO invites tenders for Price Registration for the Acquisition of Microwave Ovens, Four-Burner Stoves and Electric Coffee Makers

Subjects
Home appliances industry -- Mergers, acquisitions and divestments, Company acquisition/merger, News, opinion and commentary
Abstract

GOVERNMENT OF THE STATE OF ESPIRITO SANTO, Brazil has invited tenders for Price Registration for the Acquisition of Microwave Ovens, Four-Burner Stoves and Electric Coffee Makers. Tender Notice No: 90006/2024 [...]

Published
2024

47. CEARA GAS COMPANY invites tenders for Acquisition of Microwave Ovens, in Accordance with the Specifications and Quantities Provided for in this Term

Subjects
Gas utilities -- Mergers, acquisitions and divestments, Company acquisition/merger, News, opinion and commentary
Abstract

CEARA GAS COMPANY, Brazil has invited tenders for Acquisition of Microwave Ovens, in Accordance with the Specifications and Quantities Provided for in this Term.. Tender Notice No: 2024/08339 Deadline: April [...]

Published
2024

50. A Novel Bandstop Filter Based on Two-Port Coaxial Cavities for the Installation of Metallic Mode Stirrers in Microwave Ovens

Author

Fundación Séneca, Agencia Regional de Ciencia y Tecnología, Monzó Cabrera, Juan, Díaz Morcillo, Alejandro Benedicto, Martínez González, Antonio Manuel, Lozano Guerrero, Antonio José, Fayos Fernández, José, Pérez Campos, Rafael, Pedreño Molina, Juan Luis, Fundación Séneca, Agencia Regional de Ciencia y Tecnología, Monzó Cabrera, Juan, Díaz Morcillo, Alejandro Benedicto, Martínez González, Antonio Manuel, Lozano Guerrero, Antonio José, Fayos Fernández, José, Pérez Campos, Rafael, and Pedreño Molina, Juan Luis

Abstract

Metallic stirrers are commonly used in mode-stirred reverberation chambers but are less common in microwave ovens, because the use of a metallic axis creates a coaxial port in the cavity wall where the axis is introduced, which may result in significant microwave leakage levels. However, due to electromagnetic, mechanical, temperature, or chemical requirements, metallic axes must be used in some cases. In this paper, we present a high power coaxial filter that enables the use of metallic stirrers in microwave applications. The filter employs two-port coaxial cavities that are analyzed to determine their design parameters. These cavities are coupled via coaxial lines to achieve proper attenuation levels. The cavities were designed using commercial electromagnetic (EM) software, and a filter prototype was validated using vector network analyzer (VNA) measurements. The simulated and measured results show that a three-stage configuration can achieve attenuations greater than 70 dB at the 2.45 GHz ISM band, allowing the use and external handling of the metallic axis inserted into microwave ovens with negligible microwave radiation leakage.

Published
2022

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