Uploaded August 2025 | Updated September 2026, 2 weeks ago
Diamagnetism Paramagnetism Ferromagnetism
Dr. DeBacco
Three Main Types of Magnetic Behavior
Diamagnetism
Paramagnetism
Ferromagnetism
Strength: Ferromagnetism greater than Paramagnetism greater than Diamagnetism.
Diamagnetism
A weak repulsion from a magnetic field, caused by paired electrons whose magnetic fields cancel each other out.
Full sub-levels or outer levels (all electrons paired)
Magnetic Behavior:
Slightly repelled by a magnetic field.
Temporary effect that disappears when the field is removed.
Diamagnetism
Diamagnetic: Most stable due to paired electrons (full outer level or sub-level), minimizing reactivity and magnetic response.
Examples:
Copper (Cu)
Gold (Au)
Helium (He)
Zinc (Zn)
Bismuth (Bi)
Water (H₂O), bismuth (Bi)
Even living tissues like frogs
Paramagnetism
A weak attraction to a magnetic field, caused by unpaired electrons that create a net magnetic moment.
Half-full or partially filled sub-levels (unpaired electrons)
Magnetic Behavior:
Attracted to a magnetic field.
Temporary, loses magnetism when the field is removed.
Strength depends on temperature
Paramagnetism
Paramagnetic: Less stable, often reactive due to unpaired electrons (half-full or no special arrangement)
Examples:
Oxygen (O₂)
Lithium (Li)
Aluminum (Al)
Manganese (Mn)
Platinum (Pt)
Uranium (U)
Ferromagnetism
A strong attraction to a magnetic field, caused by unpaired electrons and magnetic domain alignment.
Unpaired electrons in d/f sub-levels with specific lattice structures.
Magnetic Behavior:
Strongly attracted to a magnetic field.
Permanent magnetism- retains magnetization even after the field is removed.
Ferromagnetism
Ferromagnetic: Least stable chemically (reactive due to unpaired d electrons), but magnetically stable due to domain alignment.
Examples:
Iron (Fe)
Cobalt (Co)
Nickel (Ni)
Summary Table
Link to Lecture Slides: drive.google.com/file/d/1cF15aycGqaVtqzY-8pr1Lt96iZvgQWXK/view?usp=drive_link
*Due to the description character limit the full work cited for "Diamagnetism Paramagnetism Ferromagnetism" can be viewed at... docs.google.com/document/d/14Zq2iTvNBep6bK8UnqUu7_fqBDTQ5mh9/edit?usp=drive_link&ouid=104237452697237972847&rtpof=true&sd=true
Diamagnetism Paramagnetism Ferromagnetism
Dr. DeBacco
Three Main Types of Magnetic Behavior
Diamagnetism
Paramagnetism
Ferromagnetism
Strength: Ferromagnetism greater than Paramagnetism greater than Diamagnetism.
Diamagnetism
A weak repulsion from a magnetic field, caused by paired electrons whose magnetic fields cancel each other out.
Full sub-levels or outer levels (all electrons paired)
Magnetic Behavior:
Slightly repelled by a magnetic field.
Temporary effect that disappears when the field is removed.
Diamagnetism
Diamagnetic: Most stable due to paired electrons (full outer level or sub-level), minimizing reactivity and magnetic response.
Examples:
Copper (Cu)
Gold (Au)
Helium (He)
Zinc (Zn)
Bismuth (Bi)
Water (H₂O), bismuth (Bi)
Even living tissues like frogs
Paramagnetism
A weak attraction to a magnetic field, caused by unpaired electrons that create a net magnetic moment.
Half-full or partially filled sub-levels (unpaired electrons)
Magnetic Behavior:
Attracted to a magnetic field.
Temporary, loses magnetism when the field is removed.
Strength depends on temperature
Paramagnetism
Paramagnetic: Less stable, often reactive due to unpaired electrons (half-full or no special arrangement)
Examples:
Oxygen (O₂)
Lithium (Li)
Aluminum (Al)
Manganese (Mn)
Platinum (Pt)
Uranium (U)
Ferromagnetism
A strong attraction to a magnetic field, caused by unpaired electrons and magnetic domain alignment.
Unpaired electrons in d/f sub-levels with specific lattice structures.
Magnetic Behavior:
Strongly attracted to a magnetic field.
Permanent magnetism- retains magnetization even after the field is removed.
Ferromagnetism
Ferromagnetic: Least stable chemically (reactive due to unpaired d electrons), but magnetically stable due to domain alignment.
Examples:
Iron (Fe)
Cobalt (Co)
Nickel (Ni)
Summary Table
Link to Lecture Slides: drive.google.com/file/d/1cF15aycGqaVtqzY-8pr1Lt96iZvgQWXK/view?usp=drive_link
*Due to the description character limit the full work cited for "Diamagnetism Paramagnetism Ferromagnetism" can be viewed at... docs.google.com/document/d/14Zq2iTvNBep6bK8UnqUu7_fqBDTQ5mh9/edit?usp=drive_link&ouid=104237452697237972847&rtpof=true&sd=true







![How Can You Prevent Hop Latent Viroid (HLVd) From Spreading?
How Can You Prevent Hop Latent Viroid HLVd From Spreading?
Professor DeBacco
Additional Video Sources:
Medicinal Genomics. (2023a, June 8). Understanding and Managing HOP latent viroid in cannabis - Zamir Punja, PhD [Video]. YouTube. https://www.youtube.com/watch?v=xQTRWQuUCzY
Starts with Testing/Screening
Knowing what you have
How Can You Prevent HLVd from Spreading?
Strict and consistent tool sterilization
PPE for workers
Rigorous testing protocol
Repeat testing of Mother room
Plant Eradication
Removing plants that test positive and removing them, followed by continual testing can reduce the presence of HLVd in a growing operation.
Cleaning Tools and Surfaces
This should be done on a regular basis.
However the product you select as your “cleaner” may make the area look clean but many not have any impact on HLVd
Not Effective Methods
Alcohol
Alcohol + flame
Flaming tools
H2O2
Acetic Acid (Vinegar)
Ammonium cleaners (Ex. Lysol)
UV Light
UV-C exposure on leaves and roots for 5min. And viroid was still present
What Does Work… (On Tools and Surfaces)
Virkon S 2%
Household Bleach 10-20% for 30-60sec.
Common lab saying… 10% bleach for 10min.
Mix and use the same day.
Same Can Not Be Applied to Root (Plant) Tissue
Previous products and recommendations are for tools and surfaces and those effective in those situations are not effective at cleaning plant tissue.
UV-C Irradiation
The viroid is very stable in plant tissue.
This makes it very hard to “clean” plant material which is why it should be bagged and physically removed.
Sap is much more Difficult
The “best” method for sap containing viroids may be Nucleases
Link to Lecture Slides: https://drive.google.com/file/d/1bKoKL-iZDk7VL11g46zDLL8cEOAnxuZe/view?usp=drive_link
*Due to the description character limit the full work cited for How Can You Prevent Hop Latent Viroid (HLVd) From Spreading? can be viewed at... https://docs.google.com/document/d/1va7Y3vADzL0X_HS82j2MRWTVNlHf_IFH/edit?usp=drive_link&ouid=104237452697237972847&rtpof=true&sd=true How Can You Prevent Hop Latent Viroid (HLVd) From Spreading?](https://i.ytimg.com/vi/ekSHtVF5eKo/mqdefault.jpg)


