Simple machines levers
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Simple machines include the inclined plane, lever, pulley, wheel and axle, and gears. A lever is a straight or bent bar that turns around a fixed point called the fulcrum. There are three classes of levers - class 1 levers multiply force but reduce speed, class 2 levers always multiply force, and class 3 levers always increase speed but reduce force. Examples of all three classes of levers can be found in the human body.
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Comprehensive Guide to Antibiotics & Beta-Lactam Antibiotics.pptx
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📢 Comprehensive Guide to Antibiotics & Beta-Lactam Antibiotics
🔬 Antibiotics have revolutionized medicine, playing a crucial role in combating bacterial infections. Among them, Beta-Lactam antibiotics remain the most widely used class due to their effectiveness against Gram-positive and Gram-negative bacteria. This guide provides a detailed overview of their history, classification, chemical structures, mode of action, resistance mechanisms, SAR, and clinical applications.
📌 What You’ll Learn in This Presentation
✅ History & Evolution of Antibiotics
✅ Cell Wall Structure of Gram-Positive & Gram-Negative Bacteria
✅ Beta-Lactam Antibiotics: Classification & Subtypes
✅ Penicillins, Cephalosporins, Carbapenems & Monobactams
✅ Mode of Action (MOA) & Structure-Activity Relationship (SAR)
✅ Beta-Lactamase Inhibitors & Resistance Mechanisms
✅ Clinical Applications & Challenges.
🚀 Why You Should Check This Out?
Essential for pharmacy, medical & life sciences students.
Provides insights into antibiotic resistance & pharmaceutical trends.
Useful for healthcare professionals & researchers in drug discovery.
👉 Swipe through & explore the world of antibiotics today!
🔔 Like, Share & Follow for more in-depth pharma insights!
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Simple machines levers
- 4. LEVERS • Lever – straight/bent bar, turns about the fulcrum • Fulcrum (F) – axis about which the lever turns, fixed point • Effort arm • Load arm • Principle of a lever – Moment of load about F = Moment of effort about F Law of lever: M.A. = Effort arm (derivation) Load arm
- 6. CLASS I LEVER (fulcrum) • Force multipliers - M.A. > 1, V.R. > 1 (greater effort arm)
- 7. CLASS I LEVER (fulcrum) • M.A. = 1, V.R. = 1 (effort arm = load arm)
- 8. CLASS I LEVER (fulcrum) • Gain in speed - M.A. < 1, V.R. < 1 (shorter effort arm)
- 9. CLASS I LEVER (fulcrum) • Examples in the human body
- 10. CLASS II LEVER (load) • Always force multipliers - M.A. > 1, V.R. > 1 (larger effort arm always)
- 11. CLASS II LEVER (load) • Examples in the human body
- 12. CLASS III LEVER (effort) • Produce gain in speed always - M.A. < 1, V.R. <1 (shorter effort arm always)
- 13. CLASS III LEVER (effort) • Examples in the human body