Week 11 Demonstration of Cleanroom Equipments
Biosafety Cabinet & Ultrasonicbath
### Key Points on Biosafety Cabinets and Ultrasonic Baths
#### Biosafety Cabinets (BSC)
1. **Purpose**: Used for handling hazardous biological materials to prevent exposure to
aerosols and contamination.
2. **Enclosed Structure**: Features an enclosed workstation to maintain a sterile environment.
3. **Classifications**:
- **Class I**: Personal protection; not suitable for work with pathogens.
- **Class II**: Offers personal, environmental, and product protection.
- **Class III**: Provides the highest level of containment.
4. **UV Light**: Used for sterilization; ensure safety glasses are worn to prevent UV exposure.
5. **Operation Guidelines**:
- Keep the sliding sash at a designated height (e.g., 200 mm).
- Turn on the fan for 15 minutes prior to use for air circulation.
- Avoid blocking air grills to maintain airflow.
- Use UV light only when the sash is closed and the fan is off.
6. **Decontamination**: Regular cleaning and sterilization of the workspace and tools are
essential to prevent contamination.
#### Ultrasonic Baths
1. **Purpose**: Used for cleaning surgical tools and equipment from contaminants like dust,
blood, and rust.
2. **Cleaning Mechanism**:
- Utilizes **cavitation**: formation and implosion of bubbles generated by ultrasound waves.
- Sound waves create shock waves that dislodge contaminants from surfaces.
3. **Equipment Features**:
- **Water Level Indicator**: Ensures the correct water level is maintained.
- **Temperature Control**: Typically includes a temperature knob; in some cases, an inbuilt
heater.
- **Timing**: Cleaning cycles generally last from a few minutes up to 20 minutes, depending
on contamination severity.
4. **Usage Tips**:
- Ensure tools are suspended in the water without touching the bottom to facilitate effective
cleaning.
- Avoid placing hands in the bath while it’s operating to prevent injury from generated heat.
5. **Versatility**: Can be used for a wide range of lab equipment, including microscope lenses.
### Safety Precautions
,- Always follow safety guidelines when operating the biosafety cabinet and ultrasonic bath.
- Wear appropriate personal protective equipment (PPE), such as gloves and safety glasses.
- Regularly check and maintain equipment to ensure proper functioning and safety.
These devices are essential in a laboratory setting, especially for working with biological
specimens, ensuring safety and cleanliness throughout the research process.
Incubator Shaker
## Key Points on Laboratory Equipment for Cell and Tissue Culture
### Biosafety Cabinet
- **Purpose**: Provides a controlled environment to prevent contamination when working with
hazardous cell or tissue cultures.
- **Types**: Classified into Class 1, 2, and 3 based on protection level.
- **Class 2**: Offers personal, environmental, and product protection.
- **Operation Guidelines**:
- **UV Light**: Used for sterilization; avoid direct exposure.
- **Airflow**: Ensure proper air circulation; do not block air grills.
- **Sterilization Protocol**: Run the fan for 15 minutes before use; maintain safety guidelines.
### Ultrasonic Bath
- **Purpose**: Cleans equipment using ultrasound agitation.
- **Working Principle**:
- **Cavitation**: Formation of bubbles through high-frequency sound waves that implode,
releasing contaminants from surfaces.
- **Usage**:
- Fill with an appropriate solvent (DI water or other) and ensure the tool does not touch the
bottom for effective cleaning.
- **Temperature Setting**: May have an inbuilt heater; avoid hand contact during operation.
### Incubator
- **Purpose**: Maintains optimal conditions (temperature, humidity, CO2 levels) for cell and
tissue culture growth.
- **Settings**:
- **Temperature**: Typically set at 37°C.
- **CO2 Levels**: Optimal at 5%; supplied from a CO2 cylinder.
- **Humidity**: Maintained around 95% with DI water placed in the bottom.
- **Design**: Features racks for multiple dishes and a glass door for visibility.
### Shaker Incubator
- **Purpose**: Provides agitation for uniform nutrient distribution and oxygenation in cultures.
- **Features**:
- **Settings**: Adjustable temperature, RPM (rotations per minute), and incubation time.
, - **Design**: Stainless steel interior for durability and ease of cleaning.
- **Operation**:
- Utilizes springs to hold culture containers; ensures sufficient mixing during incubation.
### Summary
These essential laboratory devices work together to provide a safe, controlled environment for
cell and tissue culture, enhancing research outcomes and ensuring safety and efficacy in
biological studies. Proper operation and adherence to guidelines are crucial for successful
results.
Hotplate and Microcentrifuge
Sure! Here are the key points from your lecture on "Electronic Systems for Cancer Diagnosis":
1. **Introduction to Equipment**:
- Essential equipment for biomedical research facilities focused on tissue biomechanics and
properties.
- Importance of biosensors for analyzing tissue electrical, thermal, and mechanical properties.
2. **Lithography Process**:
- Soft lithography is critical for microfabrication.
- Pre-bake and post-bake processes are essential steps in lithography, particularly with SU-8
photoresist.
3. **Photoresist Types**:
- **Negative Photoresist (SU-8)**: Cross-links upon UV exposure, making exposed areas
solid, while unexposed areas can be dissolved.
- **Positive Photoresist**: Opposite behavior, where exposed areas are removed.
4. **Pre-Bake and Post-Bake Importance**:
- **Pre-bake**: Removes solvents, ensures good cross-linking.
- **Post-bake**: Enhances feature depth after UV exposure before developing.
5. **Hot Plate vs. Oven**:
- Hot plates provide direct contact heating for uniform solvent removal, reducing the risk of
cracking in the photoresist.
- Ovens can trap solvents and lead to uneven heating, which can compromise feature
integrity.
6. **Microcentrifuge Overview**:
- Centrifugation separates particles based on density and size through centrifugal force.
- Features include adjustable speed and time settings, with safety precautions for handling
hazardous materials.
Biosafety Cabinet & Ultrasonicbath
### Key Points on Biosafety Cabinets and Ultrasonic Baths
#### Biosafety Cabinets (BSC)
1. **Purpose**: Used for handling hazardous biological materials to prevent exposure to
aerosols and contamination.
2. **Enclosed Structure**: Features an enclosed workstation to maintain a sterile environment.
3. **Classifications**:
- **Class I**: Personal protection; not suitable for work with pathogens.
- **Class II**: Offers personal, environmental, and product protection.
- **Class III**: Provides the highest level of containment.
4. **UV Light**: Used for sterilization; ensure safety glasses are worn to prevent UV exposure.
5. **Operation Guidelines**:
- Keep the sliding sash at a designated height (e.g., 200 mm).
- Turn on the fan for 15 minutes prior to use for air circulation.
- Avoid blocking air grills to maintain airflow.
- Use UV light only when the sash is closed and the fan is off.
6. **Decontamination**: Regular cleaning and sterilization of the workspace and tools are
essential to prevent contamination.
#### Ultrasonic Baths
1. **Purpose**: Used for cleaning surgical tools and equipment from contaminants like dust,
blood, and rust.
2. **Cleaning Mechanism**:
- Utilizes **cavitation**: formation and implosion of bubbles generated by ultrasound waves.
- Sound waves create shock waves that dislodge contaminants from surfaces.
3. **Equipment Features**:
- **Water Level Indicator**: Ensures the correct water level is maintained.
- **Temperature Control**: Typically includes a temperature knob; in some cases, an inbuilt
heater.
- **Timing**: Cleaning cycles generally last from a few minutes up to 20 minutes, depending
on contamination severity.
4. **Usage Tips**:
- Ensure tools are suspended in the water without touching the bottom to facilitate effective
cleaning.
- Avoid placing hands in the bath while it’s operating to prevent injury from generated heat.
5. **Versatility**: Can be used for a wide range of lab equipment, including microscope lenses.
### Safety Precautions
,- Always follow safety guidelines when operating the biosafety cabinet and ultrasonic bath.
- Wear appropriate personal protective equipment (PPE), such as gloves and safety glasses.
- Regularly check and maintain equipment to ensure proper functioning and safety.
These devices are essential in a laboratory setting, especially for working with biological
specimens, ensuring safety and cleanliness throughout the research process.
Incubator Shaker
## Key Points on Laboratory Equipment for Cell and Tissue Culture
### Biosafety Cabinet
- **Purpose**: Provides a controlled environment to prevent contamination when working with
hazardous cell or tissue cultures.
- **Types**: Classified into Class 1, 2, and 3 based on protection level.
- **Class 2**: Offers personal, environmental, and product protection.
- **Operation Guidelines**:
- **UV Light**: Used for sterilization; avoid direct exposure.
- **Airflow**: Ensure proper air circulation; do not block air grills.
- **Sterilization Protocol**: Run the fan for 15 minutes before use; maintain safety guidelines.
### Ultrasonic Bath
- **Purpose**: Cleans equipment using ultrasound agitation.
- **Working Principle**:
- **Cavitation**: Formation of bubbles through high-frequency sound waves that implode,
releasing contaminants from surfaces.
- **Usage**:
- Fill with an appropriate solvent (DI water or other) and ensure the tool does not touch the
bottom for effective cleaning.
- **Temperature Setting**: May have an inbuilt heater; avoid hand contact during operation.
### Incubator
- **Purpose**: Maintains optimal conditions (temperature, humidity, CO2 levels) for cell and
tissue culture growth.
- **Settings**:
- **Temperature**: Typically set at 37°C.
- **CO2 Levels**: Optimal at 5%; supplied from a CO2 cylinder.
- **Humidity**: Maintained around 95% with DI water placed in the bottom.
- **Design**: Features racks for multiple dishes and a glass door for visibility.
### Shaker Incubator
- **Purpose**: Provides agitation for uniform nutrient distribution and oxygenation in cultures.
- **Features**:
- **Settings**: Adjustable temperature, RPM (rotations per minute), and incubation time.
, - **Design**: Stainless steel interior for durability and ease of cleaning.
- **Operation**:
- Utilizes springs to hold culture containers; ensures sufficient mixing during incubation.
### Summary
These essential laboratory devices work together to provide a safe, controlled environment for
cell and tissue culture, enhancing research outcomes and ensuring safety and efficacy in
biological studies. Proper operation and adherence to guidelines are crucial for successful
results.
Hotplate and Microcentrifuge
Sure! Here are the key points from your lecture on "Electronic Systems for Cancer Diagnosis":
1. **Introduction to Equipment**:
- Essential equipment for biomedical research facilities focused on tissue biomechanics and
properties.
- Importance of biosensors for analyzing tissue electrical, thermal, and mechanical properties.
2. **Lithography Process**:
- Soft lithography is critical for microfabrication.
- Pre-bake and post-bake processes are essential steps in lithography, particularly with SU-8
photoresist.
3. **Photoresist Types**:
- **Negative Photoresist (SU-8)**: Cross-links upon UV exposure, making exposed areas
solid, while unexposed areas can be dissolved.
- **Positive Photoresist**: Opposite behavior, where exposed areas are removed.
4. **Pre-Bake and Post-Bake Importance**:
- **Pre-bake**: Removes solvents, ensures good cross-linking.
- **Post-bake**: Enhances feature depth after UV exposure before developing.
5. **Hot Plate vs. Oven**:
- Hot plates provide direct contact heating for uniform solvent removal, reducing the risk of
cracking in the photoresist.
- Ovens can trap solvents and lead to uneven heating, which can compromise feature
integrity.
6. **Microcentrifuge Overview**:
- Centrifugation separates particles based on density and size through centrifugal force.
- Features include adjustable speed and time settings, with safety precautions for handling
hazardous materials.
