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Forensic Bugs and Your Body: Cool Science and Scary Germs

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23/04/2023

Biology

Topic Six A level Biology

Forensic Bugs and Your Body: Cool Science and Scary Germs

The transcript covers key concepts in forensic science, immunology, and microbiology, focusing on determining time of death, immune responses, and infectious diseases like tuberculosis. It also touches on DNA profiling and antibiotic resistance.

  • Forensic entomology time of death determination uses insect life cycles
  • Non-specific immune response inflammation involves histamine release and vasodilation
  • Tuberculosis secondary infection symptoms include fever, weight loss, and coughing
...

23/04/2023

693

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Biology

693

23 Apr 2023

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Forensic Bugs and Your Body: Cool Science and Scary Germs

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@cirice

The transcript covers key concepts in forensic science, immunology, and microbiology, focusing on determining time of death, immune responses, and infectious diseases like tuberculosis. It also touches on DNA profiling and antibiotic resistance.

  • Forensic entomology time of deathdetermination uses... Show more

Forensic and time of death
• Body temperature (Nigor Marvirs) - can only be used in the past 24 hours
•Factors that affect :
"was person tem

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Forensic and Time of Death Determination

This page covers essential methods used in forensic entomology and time of death estimation, as well as key concepts in immunology and infectious diseases.

Forensic Time of Death Estimation:

  • Body temperature algormortisalgor mortis can be used within 24 hours of death
  • Muscle contraction rigormortisrigor mortis occurs 3 hours after death and lasts about 5 hours
  • Forensic entomology uses insect life cycles to determine time since death
  • Decomposition involves tissue breakdown due to enzymes and bacterial action

Highlight: The time between death and the discovery of a body is known as the post-mortem interval, which forensic scientists aim to determine accurately.

Specific Immune Response:

  • Antigen-specific responses target particular pathogens
  • Involves lymphocytes produced in bone marrow
  • B cells mature in bone marrow and are involved in humoral response
  • T cells mature in thymus gland and are involved in cell-mediated responses

Vocabulary: Innate immunity refers to the body's non-specific defense mechanisms, while adaptive immunity involves specific responses to pathogens.

Tuberculosis:

  • Infectious disease caused by Mycobacterium tuberculosis or Mycobacterium bovis
  • Transmitted through droplet infection in lungs
  • Primary infection is often symptomless
  • Secondary infection symptoms include fever, weight loss, coughing, and fatigue

Example: Symptoms of tuberculosis in throat may include persistent cough, hoarseness, and difficulty swallowing.

Non-specific Defense Mechanisms:

  • Physical barriers: skin, stomach acid, gut flora
  • Inflammation: triggered by histamine release, causing vasodilation and increased capillary permeability
  • Phagocytosis: white blood cells engulf pathogens

Definition: Non-specific immune response refers to the body's ability to defend against pathogens without recognizing specific antigens.

DNA Profiling:

  • Uses electrophoresis to separate DNA fragments
  • Polymerase Chain Reaction PCRPCR amplifies DNA samples

Antibiotics:

  • Bactericidal antibiotics kill bacteria
  • Bacteriostatic antibiotics stop bacterial reproduction
  • Antibiotic resistance can develop through mutations

Quote: "Dr will prescribe antibiotics when truly needed. Patients must complete the full course."

This comprehensive guide provides valuable insights into forensic entomology, time of death examples, and immune response, essential for students and professionals in forensic science and related fields.

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This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

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Anna

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Thomas R

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Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.

Basil

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This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.

David K

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The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

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In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.

Rohan U

Android user

I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.

Xander S

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

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This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now

Paul T

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