Introductory Courses

Writing a laboratory report (Detailed Explanation)

Writing a laboratory report (Detailed Explanation)

This is a great tutorial on how to write a lab report if you're just starting off in your studies...

See attachment

Bio_man

bio_man   6897   1 Reply

finndog32

Nile Red Membrane Staining Protocol

Nile Red Membrane Staining Protocol

Ever encountered a good protocol to stain bacterial cell membrane with nile red?

micro   2480   8 Replies

katerina2005

Which of the following statements about a buffer solution is not true?

Which of the following statements about a buffer solution is not true?

A. A buffer solutionís pH changes much less than an aqueous solution when a strong acid or base is added.

        B. A buffer solution is a solution that contains an ion and its parent weak acid (or base).

        C. A buffer solution can maintain

buglitter   2380   1 Reply

bolbol

I need advice on choosing a topic for my school project (high school)

I need advice on choosing a topic for my school project (high school)

I'd like to make a project in the field of nanobiotechnology. I'd be glad if you could help me choose a topic.

YTKAGLAMYR   194   1 Reply

bio_man

Assume ideal gas behavior. How many moles of vapor are present?

Assume ideal gas behavior. How many moles of vapor are present?

A 125-mL Erlenmeyer flask has a measured volume of 152mL. A 0.199-g sample of an unknown vapor occupies the flask at 98.7 degrees Celsius and a pressure of 754 torr. Assume ideal gas behavior.

a. How many moles of vapor are present?

b. What is the

Judas   3224   2 Replies

Sabrinna M

What is your titrant? Show (or describe) how you determined the number of moles of your titrant

What is your titrant? Show (or describe) how you determined the number of moles of your titrant

What is your titrant? Show (or describe) how you determ

Sadah_17   439   1 Reply

bio_man

Biology lab help please

Biology lab help please

What volume of liquid would be dispensed by 3 P200 set

Sadah_17   312   1 Reply

bio_man

Physioex 9.0 exercise 11

Physioex 9.0 exercise 11

I really need help with these!!!! Please! 

 Hemoglobin Determination
1. Is the male with polycythemia (sample 4) deficient in hemoglobin? Why? ___No because it was above the normal range. ___________________

Zoe   7460   4 Replies

bio_man

700uL 1:75 solution. Can be used to make 500uL 1:100 and 500uL 1:125 solutions?

700uL 1:75 solution. Can be used to make 500uL 1:100 and 500uL 1:125 solutions?

For Vf=500 and DF=100, Vi=5 and Vf=500 and DF=125, Vi=4, 9uL of the 700uL 1:75 solution would be required for the two 500uL solutions. The initial solution concentration would be 100% for the two additional dilutions. They are not serial. Am I missin

O.G. Mann   325   1 Reply

bio_man

Chemistry lab help

Chemistry lab help

what is the purpose, theory and conclusion of the acid-base titration lab?

Sadah_17   482   1 Reply

bio_man

Chemistry lab report help

Chemistry lab report help

Physical & Chemical Properties/Safety Data Sheet (

Sadah_17   428   8 Replies

Sadah_17

Chemistry lab - acid base titration

Chemistry lab - acid base titration

Did I do it right?



Results: Molarity of Na

Sadah_17   275   1 Reply

kdot14

A student wrote the formula for the compound aluminum phosphate as AlPO4 . What

A student wrote the formula for the compound aluminum phosphate as AlPO4 . What

A student wrote the formula for the compound aluminum phosphate as AlPO4 . What is wrong with this formula?

A) The compound is not charge-neutral.
B) Aluminum is a nonmetal so it cannot form an ionic compound.
C) The formula sho

CDAVISON14   1073   1 Reply

bolbol

How do you calculate molarity from absorbance and molar extinction coefficient?

How do you calculate molarity from absorbance and molar extinction coefficient?

How do you calculate molarity from absorbance and molar extinction coefficient?

florzak   3549   1 Reply

cloveb

How do I make a buffer with a specific pH?

How do I make a buffer with a specific pH?

Given 0.1M solutions of acetic acid and sodium acetate, describe how to make 1L of a 0.1M acetate buffer solution at pH 5.4?

buggmoma10   844   1 Reply

bolbol

what is the most common buffer in extracellular fluids?

what is the most common buffer in extracellular fluids?

What is the most common buffer in extracellular fluids: Phosphate, sodium and potassium, hemoglobin, or bicarbonate?

bugmenomore   2547   1 Reply

cloveb

Effect of Exercise on Arterial Pressure and Vascular Resistance

Effect of Exercise on Arterial Pressure and Vascular Resistance

Topic: Effect of Exercise on Arterial Pressure and Vascular Resistance
Predictions
1.   Exercise will cause MAP to
2.   Exercise will cause systemic vascular resistance to
3.   Exercise will cause CO to
Materials and Methods
1

Careclub   1317   7 Replies

Joyceline Tweneboa

Need help on Titration Analysis Lab?

Need help on Titration Analysis Lab?

Acetylsalicylic acid, known as ASA, is the most commonly used pharmaceutical drug, with over 10 000 t manufactured in North America every year. ASA, C8H702COOH(s), is an organic acid like acetic acid and reacts with strong bases such as sodium hydrox

Nurs-4   1130   2 Replies

Ha .B

Physioex 8.0 Exercise 9: Renal System Physiology Worksheet

Physioex 8.0 Exercise 9: Renal System Physiology Worksheet

This is my last exercise I have to do. Does anyone have all the answers? I have all the previous labs completed so I will be sure to return the favor if someone pings me for previous answers. I would appreciate it! Thanks!

Glomerular Filtr

1234

jwigginjr   33211   44 Replies

April Sal

Calculate the average biomass per 100 m2 (10m x 10m plot) for the three plots. Thus average biomass

Calculate the average biomass per 100 m2 (10m x 10m plot) for the three plots. Thus average biomass

I need some serious help with this lab....


(a.) Calculate the average biomass per 100 m2  (10m x 10m plot) for the three plots. Thus average biomass per 100 m2 = ____________ kg/100 m2
(Hint: add the total biomass for each

mgarr147   11558   9 Replies

Casey Armour II

MEALWORM LAB 10

MEALWORM LAB 10

PLEASE HELP WITH THE ANSWERS TO THIS LAB...
1.   What are the two types of innate behaviors?

2.   What is the simplest type of innate behavior?
a.   Learned behaviors
b.   Automatic responses to stimuli
c.   Responses to st

rje   6772   5 Replies

Ri Ya

What was the purpose of the balloon on the glucose-yeast extract broth bottle

What was the purpose of the balloon on the glucose-yeast extract broth bottle

Can you answer this for me, I’m confused

Marianny   341   1 Reply

bolbol

Why didn't the ions move through channel proteins or transport proteins?

Why didn't the ions move through channel proteins or transport proteins?

Hello! I recently made an experiment at school to test the semi permeability of the cell membrane of yeast cells. I did as following:
1.Sodium bicarbonate solution was put into a conical flask
2. Drops of the indicator neutral red was added

Yeast cells sem   1009   12 Replies

Dima Harba

Some cognitive functions are all of the below except

Some cognitive functions are all of the below except

Some cognitive functions are all of the below except:
   a) memory
   b) problem solving
   c) intelligence
   d) behavior

QiaowenLin   459   1 Reply

bio_man

I need to calculate V2

I need to calculate V2

C1 V1 = C2 V2   C1=3.6% V1 = 5 Gal    C2 = 2.0% what is V2?

Confused   669   2 Replies

Sam_lulu

What is the manipulated variable, responding variable and controlled variables in this Biuret test?

What is the manipulated variable, responding variable and controlled variables in this Biuret test?

Skim Milk- Starts off grey and turns pink. (peptides)
Gelatin- Starts off white and turns purple.(proteins)
Glucose- Starts off white and turns dark blue.
Egg Albumin- Starts off a light yellow and turns purple.(proteins)
Distille

markenkenmakenk   1407   4 Replies

5seal

Please help me with Cell/organic Bio online lab

Please help me with Cell/organic Bio online lab

1.   Effect of Temperature on Invertase Activity

Changes in temperature can dramatically influence the activity of most enzymes by affecting enzyme structure. This exercise is designed to help you learn how to set up an experiment in EnzymeL

vicster   2575   1 Reply

bio_man

Develop a hypothesis to predict the effect of an increase in temperature on invertase activity, then ...

Develop a hypothesis to predict the effect of an increase in temperature on invertase activity, then ...

1.   Effect of Temperature on Invertase Activity

Changes in temperature can dramatically influence the activity of most enzymes by affecting enzyme structure. This exercise is designed to help you learn how to set up an experiment in

S Castillo   517   1 Reply

bio_man

Which of these men supplied military leadership in the Italian independence movement?

Which of these men supplied military leadership in the Italian independence movement?

Which of these men supplied military leadership in the Italian independence movement?

   Count Camillo di Cavour

   Giuseppe Mazzini

   Giuseppe Garibaldi

   Victor Emmanuel

Channtelj   560   1 Reply

bio_man

Best Way to Change the Temperature of 200 mL of Water by 1 degree Celsius?

Best Way to Change the Temperature of 200 mL of Water by 1 degree Celsius?

I am doing a science project that requires me to raise the temperature of 200 mL water in a tray under a grow light. Inside the water is algae and salt. I don't know what the best tool would be to raise the temperature so minutely.
Thanks

greeneyedjohn   596   3 Replies

bio_man

Does physics count as a lab science?

Does physics count as a lab science?

Does a physics course fall under the category of a lab science?

sexypooface   892   1 Reply

bio_man

Which of the moraines listed below is not a characteristic of continental glaciation?

Which of the moraines listed below is not a characteristic of continental glaciation?

lateral, ground, terminal,recessional,

KEVNNIC70   890   1 Reply

bio_man

Amylase and Pepsin Preparaton

Amylase and Pepsin Preparaton

How would I prepare 1% solutions of Amylase and Pepsin?

With the Amylase is it just a matter of dissolving 1g of powder in 100ml of DI water?, or do you need to dissolve it in pH7 buffer?

With the Pepsin, do I need to add 1g of

12

defencegrid   1261   14 Replies

defencegrid

CHE 415 Unit Operations Laboratory II 2015 (Experiment2 -prelab report HEATTRANSFER-STEAM TO AIR)

CHE 415 Unit Operations Laboratory II 2015 (Experiment2 -prelab report HEATTRANSFER-STEAM TO AIR)

CHE 415 Unit Operations Laboratory II 2015  (Experiment2 -prelab report HEATTRANSFER-STEAM TO AIR)

cloveb   816   1 Reply

bolbol

Molecular lab- graphing absorbance data

Molecular lab- graphing absorbance data

I need  help with graphing this,

1) Using the absorbance data you gathered by turbidimetry, plot A550/OD (Y axis) as a function of elapsed time (X axis) on semi-log paper.
From this plot you will determine:

nevada   1040   2 Replies

nevada

Osmosis lab help - results are odd

Osmosis lab help - results are odd

In my lab I found that potatoes soaked in lactose had a positive growth in mass, while the other solutions (sucrose, glucose, fructose and maltose) had a negative growth. Any suggestions?
Mol mass was calculated correctly with the same amount of

anneheey98   743   1 Reply

bio_man

What method can I use to find out how many monosaccharides are in a mixture which is lactose and ...

What method can I use to find out how many monosaccharides are in a mixture which is lactose and ...

I have to design an experiment at school. I will test if different temperatures and pH levels have an effect on the enzyme activity. I have tried the fehling's solution, but I am not sure if there will be a specific colour change, if there are l

juliahin99   834   1 Reply

bio_man

Does the optical density changes when disaccharides change into monosaccharides?

Does the optical density changes when disaccharides change into monosaccharides?

I really need to know this for my biology experiment, because when the density changes I would be able to use a spectrophotometer to detect approximately how many monosaccharides are present.

juliahin99   586   1 Reply

bio_man

How dose salt affect catalase?

How dose salt affect catalase?

In a lab I found out that .5 grams of salt increased the catalase's reaction the most. .5 grams was close to the amount of salt we have in our blood, but I still didn't understand how it affected the reaction rate of the catalase.

Praise0088   1588   3 Replies

bio_man

Which of the following is not a featur typically built into a notebook computer

Which of the following is not a featur typically built into a notebook computer

Webcam

Widescreen display

Wireless networking capability

Stylus

Rigo18   2420   1 Reply

Laser_3