11

Welcome to Bio181L!

Welcome to Bio181L!

Section 33, Room 420

ASHA

Section 33, Room 420

ASHA

2What 181L is

• Thinking, Understanding, Investigating, Evaluating

• Not arrive, assembly line, leave

• Manual pp. ix & xi should help

• Not sync’ed with most lecture sections, but internally coherent & mutually reinforcing

Expectations• Read the lab manual BEFORE lab

• Be ON TIME to class

• PARTICIPATE, ASK QUESTIONS

• Complete the assignments (online, etc)

• Think, evaluate, investigate, understand

• No phones, or zero on your quiz

3

Attendance

• Absences must be excused through Asya Roberts in BSE 109

• Arriving late/leaving early is absent

• Make-up labs that same week, permission from Asya

• Miss 2 labs and you should drop, or we’ll do it

4

E-mail/Office hours• Friday 10-11 @Koffler 209

• Notify me via email if you plan to come or I will not be there

• All emails received by Monday night each week will be answered by Tuesday afternoon

5

6

181 Lab ACCOUNTS

• http://blc.arizona.edu/courses/181lab (Safari home page)

• Click ‘Create Accounts’

•Your section number is: 33

• Bio181L_Go is the way to do your work. Browser bad

7What’s an Assessor?

=>Chatting<=

8My Webpage• Get there via homepage* => Instructors => Sxn#33

*http://blc.arizona.edu/courses/181Lab (Lab Man yellow page)

ALL HOMEWORK ASSIGNMENTS DUE @ 10PM the night before your lab (TUESDAY)

9

10Some advice

http://www.damnlol.com/please-do-me-right-now-224.html

11Policies & Grading• Syllabus (Linked on course homepage)

• 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

Plagiarism

• http://deanofstudents.arizona.edu/codeofacademicintegrity/

• DO YOUR OWN WORK

• Plagiarism agreement (Manual, p. xiii)

• READ, sign, and turn in for 10 points on quiz next week!

12

1313

the Tao of Moleculesthe Tao of Molecules

How molecules feel & the world they live in

How molecules feel & the world they live in

How? Why?

1414

Primary goalsPrimary goals

• Create understanding by observation, reasoning

• Chemical foundations for the course:• Water & its properties• non-watery things• Know molecules as real & tangible

things

• Create understanding by observation, reasoning

• Chemical foundations for the course:• Water & its properties• non-watery things• Know molecules as real & tangible

things

15

From The Secret of Scent, Luca Turin p.28

When a journalist asked the great physicist Richard Feynman what single sentence would best encapsulate all science so far if it were to be the sole surviving scrap of all we knew, he replied, “The world is made of atoms.”

When a journalist asked the great physicist Richard Feynman what single sentence would best encapsulate all science so far if it were to be the sole surviving scrap of all we knew, he replied, “The world is made of atoms.”

16Atoms: They’re how life works

• Carbs: C, H, O

• DNA, RNA: C, H, N, O, P, [Mg++]

• Protein: C, H, N, O, (S), (P), [traces]

• Membranes: C, H, N, O, P, (S)

What cannot be done with assemblages of these atoms* cannot be done by living organisms, nor their

cells, nor their spit, etc.

*OK, fine, there’s the occasional role for Ca++, etc.

17Who am I?• At birth, # protons = # electrons

• Atoms seek completion, which means outermost electron set = 8 (hydrogen, helium it’s just 2)

Freeman Fig. 2.1a

1818

SymbolizingSymbolizingAtoms & MoleculesAtoms & Molecules

19Coloring your world

You will be tested

on this

20Views of Water

H2O

HO

H

See lab manual, p. 0-3

(There will be a test)+

+

-

21How to draw molecules

Carbon Hydrogen Oxygen Nitrogen

Figure is from Lab Manual p. 0-5

22Interacting with H2O

To your StructViewers!Desktop => Bio181L_Go

2323

Doing itDoing itComputers, stations

Write your group name down; otherwise you can’t retrieve your work!

Computers, stationsWrite your group name down; otherwise

you can’t retrieve your work!

Open “Tao_MCB181L” on your desktop

2424

TA-lead discussions

TA-lead discussions

Talk to me about what you’re doing!Talk to me about what you’re doing!

25“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?

26Evaporation• 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)

• If not, why not?

• Salt in your sweat

• What benefit might there be to adding NaCl to water that you are intending to evaporate?

27Clean up!

• Oil waste in the hood

• ethanol waste in the sink

• anything too messy wadded up and discarded

28What’s vocabulary homework?

• EITHER both versions of the crossword exercise

• OR VocabuWary with a better than threshold score

• For “Atoms & Molecules”, F12, that’s 60,000

• Errors count off. Slowness counts off.

2929Homework due 10 p.m. before

lab

Homework due 10 p.m. before

lab

Assessor: 181 Intro ’12Vocab Atoms/Mols: xWord(x2) or ‘Wary

Assessor: Molecular World Tutorial

Assessor: 181 Intro ’12Vocab Atoms/Mols: xWord(x2) or ‘Wary

Assessor: Molecular World Tutorial

Next week’s quiz will includeConcepts from today

Atom colorsDeducing partial charges (from tutorial)

Manual Ch. 2

Extensive! In Depth!