Difference between revisions of "Team:Valencia UPV/Safety"
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<p>Paris-Bettencourt 2012 team was right when they said in their page "How safe is safe enough?": “Biosafety is an exciting design challenge, an essential enabling technology for synthetic biology, and a fundamental ethical obligation of all bioengineers”.</p> | <p>Paris-Bettencourt 2012 team was right when they said in their page "How safe is safe enough?": “Biosafety is an exciting design challenge, an essential enabling technology for synthetic biology, and a fundamental ethical obligation of all bioengineers”.</p> | ||
| − | <p>This sentence describes perfectly what we did with printeria. Printeria was designed to ensure safety. In the next table you can se diferent safety problems we saw and how we solved them.</p> | + | <p>This sentence describes perfectly what we did with printeria. Printeria was designed to ensure safety for all audiences. In the next table you can se diferent safety problems we saw and how we solved them.</p> |
<!----Empìezo listado con una separación----> | <!----Empìezo listado con una separación----> | ||
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<tr> | <tr> | ||
<td><p>Sterilization of the PCB</p></td> | <td><p>Sterilization of the PCB</p></td> | ||
| − | <td><p>How do we clean the PCB without damaging the metalic and plastic components. Well, we decided to copy what flow cabins do. Based on this we decided to use UV | + | <td><p>How do we clean the PCB without damaging the metalic and plastic components. Well, we decided to copy what flow cabins do. Based on this we decided to use UV led lights to achieve this objective. Furthermore we have programmed an especial reaction that use little droplets with HCl and ethanol to clean and ensure we have perfectly sterilized the PCB.</p></td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td><p>Sterilization of the microfluidic tubes</p></td> | <td><p>Sterilization of the microfluidic tubes</p></td> | ||
| − | <td><p>The reaction fluid is going to pass through microfluidic tubes and it will contaminate them, to reverse this situation we will use the same droplets with ethanol and HCl.</p></td> | + | <td><p>The reaction fluid is going to pass through microfluidic tubes and it will contaminate them, to reverse this situation we will use the same special program wich usses droplets with ethanol and HCl.</p></td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td><p>Protection of the user</p></td> | <td><p>Protection of the user</p></td> | ||
| − | <td><p>We want the user to see what is happening inside Printeria but also we want them to be protected if something wrong happens inside. Thats why we thought that a | + | <td><p>We want the user to see what is happening inside Printeria but also we want them to be protected if something wrong happens inside. Thats why we thought that a metacrilate box that cover the machines would be a nice option. Besides, it is useful to pin up the elements whicht will be part of Printera.</p></td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td><p>Overheating of the PCB</p></td> | <td><p>Overheating of the PCB</p></td> | ||
| − | <td><p>As the PCB has a cold | + | <td><p>As the PCB has a cold and a hot zone, it is necessary to evacuate the heat generated. The hot zone can achieve more than 80º degrees and can be a potencial danger. A resisitance is responsible of heating and a peltier plate is responsible of chilling. Peltier effect is based in a semiconductor metal where you apply a potential difference. Then, you create a hot part and a cold one in that semiconductor. We use the cold part to extract the energy and stabilize the temperature via conduction of the PCB's hot zone.</p></td> |
| + | </tr> | ||
| + | <tr> | ||
| + | <td><p>Ventilation</p></td> | ||
| + | <td><p>The peltier plate is responsible of chilling the PCB but ¿How do we evacuate all the energy generated? Well, the answer is simple, Printeria just needed ventilation holes and a fan to do it.</p></td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
Revision as of 21:40, 4 October 2018
Introduction
As Theodor Reik (Sigmund Freud disciple) said: “In science, like in all life fields, a slogan is imposed: security first”. Nowadays, safety is an essential requirement when creating new devices that humans will use, and Printeria is not different.
This document describes the safety of our project so, a clever step before begining is to know what is it. Safety describes the containment principles, technologies and practices that are implemented to prevent the unintentional exposure to pathogens and toxines, or their accidental release [1]. Furthermore, safety is how you have protected yoursef and other in order to avoid any harms which could occur.
Printeria is designed to be a secure device, because is going to be used by bioartists, schools and researchers (our identified potential users according to ENLACE TABLA DEL MIT) and we don’t want it to be a variable which create concern in those users. This approach toguether with our lab tools and posibilities have influenced the experiments we did and the way we build Printeria. Next paragraphs describe how and why we implemented biosafety and biosecurity requirements in Printeria.
Lab safety
Safety design in Printeria
Lab Safety
Our laboratory
We have planned this project consequently with the tools we have. Our lab follows the current spanish legislation about risk 1 (Ley 31/1995, RD 664/1997) and as it is written, is provided with an autoclave and an extractor hood with UV sterilization. The waste generated are minutely controlled by CGROM (waste management center of the Universitat Politécnica de València). They provide every lab with special containers and instructions for the correct classification of waste.
FOTO CONENEDORES
As an additional safety measure we use SYBR Safe instead of Ethidium bromide. Its use is identical in all the protocols but without carcinogenic risks.
Access to the laboratory
As we are a multidisciplinary team formed by biotechnologists, engineers and artists not everybody knows how to behaviour in a lab. Thats why we did several seminars directed by Alejandro Vignoni and Yadira Boada (DOCUMENTOS SEGURIDAD DISA) to teach the basics of their lab. However, as a security measure, they decided that not everybody would be allowed to work in the lab alone, only biotechlogist and biomedical engineers could be there without surveillance due to their experience and knowledge adquiered during their degree.
Strains
Printeria uses E.coli and V.natriegens as chassis. Both are classified as risk 1 so the harm which can cause to people is minimal. E.coli are from strains DB3.1, 10G and TOP10, for V.natriegens we use the strain ATCC 1404 from CECT (Colección Española de Cultivos Tipo). To do constructions we use biobricks and parts supplied by IDT prepared with the Golden Gate grammar.
Safety design in Printeria
Paris-Bettencourt 2012 team was right when they said in their page "How safe is safe enough?": “Biosafety is an exciting design challenge, an essential enabling technology for synthetic biology, and a fundamental ethical obligation of all bioengineers”.
This sentence describes perfectly what we did with printeria. Printeria was designed to ensure safety for all audiences. In the next table you can se diferent safety problems we saw and how we solved them.
Safety Problem |
Solution |
|---|---|
Sterilization of the PCB |
How do we clean the PCB without damaging the metalic and plastic components. Well, we decided to copy what flow cabins do. Based on this we decided to use UV led lights to achieve this objective. Furthermore we have programmed an especial reaction that use little droplets with HCl and ethanol to clean and ensure we have perfectly sterilized the PCB. |
Sterilization of the microfluidic tubes |
The reaction fluid is going to pass through microfluidic tubes and it will contaminate them, to reverse this situation we will use the same special program wich usses droplets with ethanol and HCl. |
Protection of the user |
We want the user to see what is happening inside Printeria but also we want them to be protected if something wrong happens inside. Thats why we thought that a metacrilate box that cover the machines would be a nice option. Besides, it is useful to pin up the elements whicht will be part of Printera. |
Overheating of the PCB |
As the PCB has a cold and a hot zone, it is necessary to evacuate the heat generated. The hot zone can achieve more than 80º degrees and can be a potencial danger. A resisitance is responsible of heating and a peltier plate is responsible of chilling. Peltier effect is based in a semiconductor metal where you apply a potential difference. Then, you create a hot part and a cold one in that semiconductor. We use the cold part to extract the energy and stabilize the temperature via conduction of the PCB's hot zone. |
Ventilation |
The peltier plate is responsible of chilling the PCB but ¿How do we evacuate all the energy generated? Well, the answer is simple, Printeria just needed ventilation holes and a fan to do it. |
Electroporator |
Ha sido diseñado en una PCB dedicada y compacta para aislarlo correctamente de cualquier exposición del usuair a 1600 V. |
Tips |
Tips which go in the revolver wheel are disposable to ensure the purity of each reaction. |
A science without ethics is cruel, and an ethics with science is empty. Ethics become really important when a project is being thought. For this reason we wanted to pass the UPV (Universitat Politécnica de Valencia) ethics committee. Here you can download the document we send them to approve and the answer of the committee.