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Welcome to 181L

Welcome to 181L. MCB 181L Course Website: http://blc.arizona.edu/courses/181lab Instructor: Chris Jarchow Email: christoj@email.arizona.edu Section: 73 Office Hour: Tues. 11:00 - noon in Koffler 422 (by appointment only; notify me by Tues. @ 10:50 am)

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Welcome to 181L

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  1. Welcome to 181L • MCB 181L Course Website: http://blc.arizona.edu/courses/181lab • Instructor: Chris Jarchow • Email: christoj@email.arizona.edu • Section: 73 • Office Hour: Tues. 11:00 - noon in Koffler 422 (by appointment only; notify me by Tues. @ 10:50 am) • Email Reading Times: Monday and Wednesday 5-6 pm

  2. 181L is … • Thinking, Understanding, Investigating, Evaluating • Not, memorize, regurg., leave, forget, repeat • Manual pp. ix & xi should help • Not sync’ed with most lecture sections, but internally coherent & mutually reinforcing

  3. 181 Lab ACCOUNTS • Attendance vs. UAccess.arizona.edu

  4. About You • http://blc.arizona.edu/courses/181lab (Safari home page) • Click ‘Create Accounts’ • Your section number is: ## • **Bio181L_Go** is the way to do your work. Browser bad • Sci. Library, BLC supported • While waiting, fill out a card (name on front; on back, primary concern about this course?).

  5. My Webpage • Get there via homepage* => Instructors => Sxn# *http://blc.arizona.edu/courses/181Lab (Lab Man yellow page)

  6. Web page operation

  7. Web page operation

  8. Web page operation

  9. Web page operation

  10. Web page operation

  11. A few points to discuss • In-class quizzes (every week) • Material from manual • Concepts practiced/demonstrated in class • Primarily covers previous week’s lab • some questions will come from manual on current week’s lab • Course also linked to D2L • ALL written assignments, unless instructed otherwise, will be submitted to the D2L Dropbox (10:00 PM night before lab)

  12. Policies & grading • Syllabus (Linked on course homepage) • Honor code & Plagiarism (Manual, p. xiii) • Assignments • On-line assessments/tutorials (10%) • In-class quizzes (15%) • Lab assignments (LABAs--Lab Activity Based Assignments) (50%) • Lab Projects & reports (combine to 25%) • Every assignment is posted & reported on basis of 100% • For electronic assignments, log in again to see your recorded score • Also reported to you at the end

  13. ATTENTION • No Late Work Accepted! • Absences: must contact Asya Roberts (Bio. East 109) as soon as possible, including planned/unplanned absences • Must be documented as a legitimate excuse (2 absences = dropped) • No dedicated make-up lab available for this course • Late (≥ 10 mins) = absent. leaving early = absent. • Quizzes (in-class) administered at the start of class; MUST be on time to take quiz and receive credit (as well as credit for that day’s assignments)! • Behavior in lab • NO ELECTRONICS, PERIOD. • Beware the admin. drop

  14. How? Why? the Tao of Molecules • How molecules feel & the world they live in

  15. Primary goals • Create understanding by observation, reasoning • Chemical foundations for the course: • Water & its properties • non-watery things • Know molecules as real & tangible things

  16. Atoms • DNA, RNA: C, H, N, O, P, [Mg++] • Carbs: C, H, O • Protein: C, H, N, O, (S), (P), [traces] • Membranes: C, H, N, O, P, (S) *there’s the occasional role for Ca++, etc.

  17. Who am I? • At birth, # protons = # electrons • Atoms seek completion, which means outermost electron set = 8 (hydrogen, helium it’s just 2)

  18. Symbolizing Atoms & Molecules

  19. Color – know these

  20. Views of water H2O

  21. Views of water O H2O H H

  22. Views of water O H2O H H

  23. + + - Views of water O H2O H H See lab manual, p. 0-3

  24. How to draw molecules Carbon HydrogenOxygenNitrogen Figure is from Lab Manual p. 0-5

  25. Interacting with H2O • To your StructViewers! • Desktop => Bio181L_Go

  26. Tao of Molecules

  27. Hypotheses • What are they?

  28. Hypotheses • Causal explanation of an observed phenomenon

  29. Lab materials • Pipetman operation • Pipet ‘pump’ operation

  30. Tao of Molecules • Group names • Initials of all members (no spaces) • Desktop =>Tao of Molecules

  31. “Salting out” • It’s a real term; used to refer to a situation where the addition of salt (portable charges) alters the solubility of other molecules in water • Why should this be?

  32. Evaporation • First things first--what is it? What’s going on in terms of molecules • Experiment: Ethanol and water on your arm: which is cooler & why? • Prediction: based on molecular weight, which should evaporate more quickly--H2O (2 x 1 + 1 x 16) or CH3CH2OH (5 x 1; 2 x 12; 1 x 16)

  33. Evaporation • If not, why not? • Salt--ever tasted your sweat? Or anybody else’s for that matter? • What benefit might there be to adding NaCl to water that you are intending to evaporate?

  34. Clean up! • Oil waste in the hood • ethanol waste in the sink • anything too messy wadded up and discarded

  35. What’s Assessor? =>Chatting<=

  36. Vocabulary homework • EITHER both versions of the crossword exercise • ORVocabuWary with a better than threshold score • For “Atoms & Molecules”, that’s 60,000 • Errors count off. Slowness counts off.

  37. Homeworkdue 10 p.m. before lab • Assessor: 181 Intro ’12 • Assessor: Molecular World Tutorial • Vocab Atoms/Mols: xWord(x2) or ‘Wary • Next week’s quiz will include: • - Concepts from today • - Atom colors • - Deducing partial charges (from tutorial) • - Manual: Lab 2

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