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Welcome to Bio181L!

Welcome to Bio181L!

Contemplating the nuts & bolts of Life“It’s atoms all the way down”

Contemplating the nuts & bolts of Life“It’s atoms all the way down”

2About me...

• Graduated U of A with bachelors of science in EEB

• Love animals, traveling, volleyball and snowboarding

• Preparing for graduate school in oceanography/marine biology

Now its your turn!•Major•Hobbies•Plans for the future

3What 181L is• Thinking, Understanding, Investigating, Evaluating

• Not arrive, assembly line, leave

• Building basics and applying them in many different ways

• Manual pp. ix & xi should help

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

Office Hours

• I will hold one office hour per week

• Thursdays 12:30am – 1:30pm (will extend if necessary)

• Also by appointment if necessary

• Email me in advance if you are coming or I won’t show up

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5

181 Lab ACCOUNTS• http://blc.arizona.edu/courses/181lab (Safari home

page)

• Click ‘Create Accounts’

•Your section number is: 66

• Do not use UAnetID password for this account!!

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

680% of success is just showing up*

• Absences must be excused by Asya Roberts in BSE109 prior to making up. Contact her as soon as possible. Really.

• Late is absent. Leaving early is absent.

• Labs cannot be offered week after they are delivered; Avoid missing a lab

• Missing 2 labs => you’ll be dropped from the course--excused or otherwise (b/c you’ll have little shot at learning what you need)

• Make up labs – written documentation from Asya showing excused absence (same week that lab was delivered)

*--Woody Allen

7Policies & Grading

• Syllabus (Linked on course homepage)

• Honor code & Plagiarism (Manual, p. xiii)

• Sign plagiarism contract

• 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

Doing Homework• Use Bio181L_Go Program! Download from software link

• All assignments should be in this program unless otherwise stated

• View tutorial movies on how these online assignments work

• ALL homework due by 10pm the night before your lab section meets

• Use calendar as a reference for what homework is due when (Demo)

• LOG IN for credit

• Note – quiz answer key Friday afternoon

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9My Webpage• Get there via homepage* => Instructors => Sxn#

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

10Web page operation

Quizzes• Every lab, first 15 min

• Will highlight topics from the previous lab and one question about the lab being performed that day (read manual!)

• No quiz make-ups for being late

• There will be a quiz at the end of lab today

• Clean up!!! Points off quiz if not satisfactory

• Bottom right of homepage

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Written Assignments

• Most written assignments assigned for homework will be turned in on D2L via the dropbox (Demo)

• I will leave feedback

• Don’t hesitate to ask me why something was graded the way it was

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Lab Manual

• Read it!

• Vocab at the end of every lab

• Helpful topics in appendices

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Classroom Policies

• No cell phones, in emergency go outside please

• No food/drink in the lab (water ok but away from computers)

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DRC Students

• See me after class if you have questions or require action on my part

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1616

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?

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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

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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.”

19Atoms: They’re how life works

• 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)

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.

20Who 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

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SymbolizingSymbolizingAtoms & MoleculesAtoms & Molecules

22Coloring your worldGrey

White

Blue

Red

YellowGold

23Views of Water

H2O

HO

H

See lab manual, p. 0-3

(There will be a test)+

+

-

24Interacting with H2O

To your StructViewers!Desktop => Bio181L_Go

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Doing itDoing itComputers, stations

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

Desktop Tao Stack 181L (not honors)

Computers, stationsWrite your group name down; otherwise

you can’t retrieve your work!Desktop Tao Stack 181L (not honors)

Pipetman Demo

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Group names• 1 – dolphin3

• 2 – elephant3

• 3 – penguin3

• 4 – turtle3

• 5 – sloth3

• 6 – panda3

• 7 – cheetah3

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28How to draw molecules

Carbon Hydrogen Oxygen Nitrogen

Figure is from Lab Manual p. 0-5

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TA-lead discussions

TA-lead discussions

Alcohols – similarities/differencesPropanol + Water + Salt

Alcohols – similarities/differencesPropanol + Water + Salt

30“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?

31Evaporation• 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

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• Which do you expect to evaporate first? Why?

• 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?

32Clean up!

• Oil waste in the hood

• Ethanol waste in the sink

• Anything too messy wadded up and discarded

• There is a bucket of soap water by the sink, all empty (cleaned) glassware here

• Check out goopy stuff in front of room when finished

33What’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.

3434Homework 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!