Low-Cost Magnetic Stirrer from Recycled Computer Parts with Optional Hot Plate

Guidote, Armando M.; Pacot, Giselle Mae M.; Cabacungan, Paul M.

doi:10.1021/ed500153r

Cited by 10 publications

(8 citation statements)

References 11 publications

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“…The usefulness of programmable devices and microcontrollers in chemical education is well established, − with in-house fabricated equipment such as photometers, , colorimeters, syringe pumps, pH meters, , PCR thermal cyclers, data acquisition devices, and potentiostats, , proving inexpensive relative to use of desktop computers and commercial instruments. These low cost, simple instruments permit a 1:1 device to student ratio that can redefine the learning experience and support students through hands-on design and construction. , A recent report demonstrated use of recycled computer parts to produce a magnetic stirrer, with the option of heating . However, the device is complex, requiring assembly of more than 35 parts, and it is not programmable.…”

Section: Introductionmentioning

confidence: 99%

Inexpensive Miniature Programmable Magnetic Stirrer from Reconfigured Computer Parts

Mercer

Leech

2017

J. Chem. Educ.

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This technology report outlines a robust and easy to assemble magnetic stirrer that is programmable. All of the parts are recycled from obsolete computer hardware except the Arduino microcontroller and motor driver, at a total cost of around $40. This multidisciplinary approach introduces microcontrollers to students and grants the opportunity to interface basic computer programming with practical applications in chemistry. Utilizing the popular Arduino board empowers students to control laboratory devices, which in turn enhances enjoyment and understanding.

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Section: Introductionmentioning

confidence: 99%

Inexpensive Miniature Programmable Magnetic Stirrer from Reconfigured Computer Parts

Mercer

Leech

2017

J. Chem. Educ.

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“…It is fined with the stirrer and heat control. Stirring is done by creating magnetic field, which causes the bar magnet kept in the container to spin resulting in the stirring [26].…”

Section: Haemo Cytometermentioning

confidence: 99%

Diagnosis of Fungal and Bacterial Diseases Based on Symptom & Sign

Demissie¹

2019

AJPB

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Plant disease diagnosis is a form of hypothesis testing, where the hypothesis is simply the identity of the disease, and a good diagnostician goes through multiple iterations of the scientific method (seeking evidence through testing that supports or refutes the hypothesis that s/he generates). Identification of affected plants is one of the first steps in diagnosing a plant disease. Diagnosis is one of the most important aspects of a plant pathologist's training. Both scientific and common names of the plant should be noted. Without proper identification of the disease and the disease-causing agent, disease control measures can be a waste of time and money and can lead to further plant losses. Fungi are small, generally microscopic, eukaryotic, usually filamentous, branched, spore-bearing organisms that lack chlorophyll. Bacteria are prokaryotes. These are generally single-celled microorganisms whose genetic material (DNA) is not bound by a membrane and therefore is not organized into a nucleus. Our general objective was to acquaintance with Plant pathology laboratory materials & make disease diagnosis from field up to laboratory based on symptom and signs from different plant samples. All most all necro-tropic and bio-tropic fungi are grown on PDA agar, but bio-tropic fungi and bacterial diseases cannot grow on PDA agar. The best preferable method to diagnosis bio-tropic fungi is using direct leaf assay and blotting method on petri-dish. For bacterial disease identification we use NA agar. From this laboratory work I had concluded that those fungal and bacterial diseases need their niche to grow and well identified. It is very difficult to identify plant diseases based on sign and symptom. It is very imperative to diagnosis plant disease by collaborating both conventional (using sign and symptom) and molecular methods. It needs further work to identify rust diseases using race analysis up to f. species level.

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“…Accordingly, new subjects related to these topics are emerging in the curricula of different degrees in sciences and technology. Indeed, it is important to raise student awareness about environmental protection, and new laboratory experiments that deal with recycling, reusing components, and removing hazardous compounds are being introduced. In the lab experiment presented here, students will use spent screen-printed platinum electrodes (SPPtEs) to selectively recover silver and platinum from conductive inks by different leaching solutions.…”

Section: Introductionmentioning

confidence: 99%

Recycling Metals from Spent Screen-Printed Electrodes While Learning the Fundamentals of Electrochemical Sensing

et al. 2018

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A laboratory experiment in which students recycle silver and platinum selectively from spent screenprinted platinum electrodes is described. The recovered silver in solution is used to show its spontaneous redox reaction with a copper sheet. The recovered platinum is electrodeposited onto a screen-printed carbon electrode to develop a sensor for hydrogen peroxide quantification in a commercially available hair lightener. The experiment is designed for a 3 h laboratory period and can be adapted for upper-division undergraduate education, graduate education, or even research students in electrochemistry, environmental chemistry, analytical chemistry, materials science, chemical engineering, or physical chemistry laboratories. It allows students to train in adequately handling strong acids, working in fume hoods, and neutralizing acid gases. It also allows one to teach the basics of metal recycling and enables students to learn the fundamentals of electrochemical sensing. The experiment also helps to raise student awareness of waste disposal problems and how recycling can help to reduce the amount of waste that we create.

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Low-Cost Magnetic Stirrer from Recycled Computer Parts with Optional Hot Plate

Cited by 10 publications

References 11 publications

Inexpensive Miniature Programmable Magnetic Stirrer from Reconfigured Computer Parts

Inexpensive Miniature Programmable Magnetic Stirrer from Reconfigured Computer Parts

Diagnosis of Fungal and Bacterial Diseases Based on Symptom & Sign

Recycling Metals from Spent Screen-Printed Electrodes While Learning the Fundamentals of Electrochemical Sensing

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