Introductory Courses

ASPH protein with mood disorders and suicidal behavior

ASPH protein with mood disorders and suicidal behavior

5 a serotonin (5-HT) system dysfunction with negative emotional states, including depression, anxiety. 5-HT decrease can lead to behavioral disinhibition, impulsive aggressive behavior in humans and antisocial behavior, suicide and suicide-related be

yoxi5236   1159   N/A

yoxi5236

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   3112   2 Replies

Sabrinna M

AST 100 Home work question help

AST 100 Home work question help

You are analyzing Moon rocks that contain small amounts of uranium-238, which decays into lead with a half-life of about 4.5 billion years.

In a rock from the lunar highlands, you determine that 50% of the original uranium-238 remains, whi

Dmagrino   6663   3 Replies

padre

astro

astro

Because the discovery of hot Jupiters surprised scientists, they had to consider why the nebular theory had not predicted this discovery in advance. Which statement below does not describe a scientifically reasonable explanation for why the neb

kys860505   504   1 Reply

bio_man

Atrial fibrillation patients receiving rhythm control therapy may benefit more

Atrial fibrillation patients receiving rhythm control therapy may benefit more

Louise Pilote Montreal Royal Victoria Hospital, MD, MPH, Ph.D., he and his colleagues found that: In the four years of follow-up time for more than 26,000 cases of atrial fibrillation in patients with heart rate control or rhythm control treatment, d

yoxi5236   1466   N/A

yoxi5236

Bacterial Growth Curve

Bacterial Growth Curve

When determining the incubation period required for a bacteria species/strain to reach a particular growth phase e.g. exponential phase by plotting a growth curve, is there a standard starting OD value? (if one is using turbidity as an indirect metho

micro   2004   3 Replies

ksubiochem

basic chemistry question: what is the relationship between absorbance and wavelength?

basic chemistry question: what is the relationship between absorbance and wavelength?

could you please tell me is this right or wrong:
Their relationship is that at a specific wavelength, for example 700 the color red is shown, all the other colors are absorbed but only the color red is not absorbed and transmitted. so this is why we

zyxomma77   662   1 Reply

buffzyzz

Basic Lab Equipment

Basic Lab Equipment

I am looking into some basic lab equipment to buy for myself to set up a basic lab environment. Do you have any suggestions of a supplier with no-so-sophisticated/advanced equipment with reasonable prices? I'm thinking: micropipettes, tips, smal

micro   2337   5 Replies

maggie L.

Basic SEM Protocol

Basic SEM Protocol

I've seen a lot of protocols for bacterial suspension sample preparation for SEM, but they vary in some way or another. What is a basic, simple procedure? How hard is it to prepare samples for SEM?

micro   526   1 Reply

csimon97

Best way to be a Clinical Laboratory Scientist?

Best way to be a Clinical Laboratory Scientist?

To get a four year degree in Biology, then a masters in Clinical Lab Science.
Or get a BS in Clinical Laboratory Scientist?

The thing is the only school near me that has the BS in CLS is a bit too low standard for me.. But I still have over a year

michaelnice   339   1 Reply

michealjohnson

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   524   3 Replies

bio_man

Bio & Chemistry lab for grade 9 & 10?

Bio & Chemistry lab for grade 9 & 10?

How kids that do home schooling can do grade 9 & 10 (high school) labs. Are there any private labs or local high school can help.
Looking for a solution.

Ikkou   415   2 Replies

jtwl

Bio Enzyme Lab online

Bio Enzyme Lab online

Set up an experiment at 50° C with a buffer pH of 4.0 and a [ S ] of 0.0 mM. Add enzyme. Find the slope of the line and record data for this first measurement. Continue to take measurements by carrying out separate experiments with increasing concent

vicster   2191   N/A

vicster

Bio Enzyme Lab Online

Bio Enzyme Lab Online

1.   Role of Acarbose as an Invertase Inhibitor

This experiment is designed to help you determine whether acarbose functions as a competitive or noncompetitive inhibitor of invertase.

Set up an experiment at 50° C, buffer pH 4.0,

vicster   2027   N/A

vicster

Bio Lab Enzyme Reaction???

Bio Lab Enzyme Reaction???

I have to design a bio lab... ? I just don't get it. The instructions are here: http://www.mhln.com/CorsairBook?ACTION=0&FILE=164.html&ISBN=0078299004&S=0&F=1

Someone please help me!

ilikepie1234   363   1 Reply

smj545

biolo

biolo

what are the structural characteristics of glucose, fructose, sucrose and starch?

harman13   448   2 Replies

harman13

Biological gradient?

Biological gradient?

I am reviewing a study packet and one of the first items in the packet is: Determine complexity increases at each step of the biological gradient and also explain the terms associated with the biological gradient.

I've gone through al

grizzlyUSMC   1812   1 Reply

robertling

biology

biology

Compare sucrose to glucose and fructose.
o Is sucrose efficiency similar to glucose, fructose or neither?
o Do some research and indicate whether this was an expected. Briefly explain and write down the reference you used.
o How can yo

harman13   1283   1 Reply

princess001

Biology Enzyme Lab...?

Biology Enzyme Lab...?

Okay so I am really dumb and I have no idea how to do this....

Q: Devise and experiment to show the minimum amount of the enzyme pepsin required to break down a given weight of gelatin.

I don't even know what enzyme pepsin is!
Help!
THANK YOUUUUUUU

ilikebigbutts   421   1 Reply

Smitty

biology enzyme question lab?

biology enzyme question lab?

Your data sheet for ten different experiments. (Think about this question: What did you observe for the plot of product concentration versus time? Is this what you expected? Explain your answer.)

This is the question. What happen is when the enzyme

buddizzle   544   2 Replies

budi

Biology lab help please

Biology lab help please

What volume of liquid would be dispensed by 3 P200 set

Sadah_17   244   1 Reply

bio_man

biology lab help? enzyme catalyst lab.?

biology lab help? enzyme catalyst lab.?

The procedure was to first place a small drop of hydrogen peroxide on raw liver. after that we were told to dip filter paper disks in liquefied liver and observe how changing the temperature of the hydrogen peroxide speeds up the rate of reaction. ho

lexiieeex3   656   1 Reply

smmcmahon35

Biology Lab: Cell cycle and Cancer

Biology Lab: Cell cycle and Cancer

Has anyone seen/done this lab before??   


Lab 2 Worksheet:  The Cell Cycle and Cancer

Student instructions:  Follow the step-by-step instructions for this exercise found on the worksheet below and in th

12

Charlie   21860   21 Replies

vickay

Biology Lab: Plant Transpiration

Biology Lab: Plant Transpiration

Has anyone ever seen/done this lab before??   


Lab 3 Worksheet:  Plant Transpiration

Student instructions:  Follow the step-by-step instructions for this exercise found on the worksheet below and in the

Charlie   35750   7 Replies

bio_man

biology labreport about sea urchins

biology labreport about sea urchins

 1) It is easy to see that starfish exhibit radial pentamerous symmetry. Sea urchins also exhibit the same type of symmetry. Given that sea urchins do not have arms, how can you tell they are radially pentamerous?

2)how do see urchins repi

NAZ   3461   1 Reply

duddy

Biology Questions on Compound Light Microscope?

Biology Questions on Compound Light Microscope?

What is the functions of the following parts of compound light microscope"
a. condenser lens
b. iris diaphragm
c.objective
d.ocular

2. In order, list the lenses in the light path between a speciman viewed with the compund light microscope and its im

darkshinra   960   1 Reply

juan123

bioloigy lab

bioloigy lab

I am trying to do this pre-lab stuff and the lab manual doesn't explain things well. Thanks if you can help.......Calculate the amount of 0.1 M sucrose solution and the amount of dH2O needed to prepare 100 mL of unbuffered 20 mM sucrose. I am fo

oldcollegelady   1200   3 Replies

bio_man

Buffer calculations. I need to calculate the the amount of buffer solutions to add in order to get a certain p?

Buffer calculations. I need to calculate the the amount of buffer solutions to add in order to get a certain p?

I need to make a 0.1 M glycine buffer with a pH of 9.4. I have two buffers of 0.1 M glycine that have a pH of 9 and a pH of 10. How would I make 200mL of my pH 9.4 glycine buffer? Thank you in advance for your help!

bugmenomore   605   1 Reply

Bugmenot

Buffer question: How to calculate the volume?

Buffer question: How to calculate the volume?

Calculate the volume of 1M NaOH solution that needs to be added to 0.1M citric acid solution to prepare a buffer of pH 4.0?

Can someone show me how to do it?

Bugrahan   698   1 Reply

irina

Buret readings in lab?

Buret readings in lab?

A dirty buret reading was used for an analysis causing droplets of HCl solution to cling to the buret wall. If HCl droplets cling to the buret wall between the initial and the final buret readings for an analysis, will the molar solubility of Ca(OH)2

DarkTakeda   1249   1 Reply

__Aycee

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   11395   9 Replies

Casey Armour II

Calculate the mole percent oxygen in the air Lab?

Calculate the mole percent oxygen in the air Lab?

In my chem class we are doing a lab where we must find the mole percent oxygen in air saturated with water vapor and air from which the water vapor has been removed.

First of all, what exactly is mole percent oxygen?
Secondly, If we have the initial

smiley13   631   1 Reply

darkwind

Calculate the pH of a buffer solution that contains sodium acetate and acetic acid?

Calculate the pH of a buffer solution that contains sodium acetate and acetic acid?

Calculate the pH of a buffer solution that contains 0.820 grams of sodium acetate and 0.010 moles of acetic acid in 100 ml of water. The Ka of acetic acid is 1.77 x 10-5.
If you could please show the steps on how to do this, I'm very confused. Thank

buggmoma10   776   1 Reply

Bugrahan

Calculating cell concentration at different dilutions?

Calculating cell concentration at different dilutions?

I'm working on a lab now, and I need some help with the calculations. It says: "The initial concentration of ADP1 cells in the lysis buffer was 5x10^8 cells/ml. How many cells should have been available in 0.1 ml of this solution at 10^-5 dilution?"

tom_andrews   282   1 Reply

nurazije

Calculating Concentration

Calculating Concentration

In the question, I need to calculate concentration of two solutions.
One with 30ml of 10M metal solution(Fe 2+) and 50ml of buffer.
 Another with 10ml of 10M metal soltion (Zn 2+), 20ml of water, and 50ml of buffer.

I need to ca

kayleigh   607   1 Reply

zoeksyrianos

Can amylase still break down foods in the mouth if they exceed 37 degrees?

Can amylase still break down foods in the mouth if they exceed 37 degrees?

considering that amylase works in the mouth, and theoretically at 37 degrees... if you were eating or drinking something, with a high temperature, would amylase still be able to break down the starch?

zzwChris   538   2 Replies

smj545

Can anyone help me in designing an experiment regarding distance between mirrors n phase difference?

Can anyone help me in designing an experiment regarding distance between mirrors n phase difference?

The aim of the experiment is to investigate the distance between mirrors and the phase difference in the beam produced by lasers. It would be really helpful if apparatus needed for the experiment is mentioned. The experiment is to be conducted in a t

rixter119   307   1 Reply

fionacurley

Can anyone help me with my Lab 2. I got my data numbers, unable to get average%

Can anyone help me with my Lab 2. I got my data numbers, unable to get average%

Table 1:  Record your data for the number of cells in each stage of the cell cycle observed in normal tissues.

Tissue Type   # Cells in Interphase   # Cells in Prophase   # Cells in
Metaphase   # Cells in Anaphase   # Cells in
Telopha

mm231974   3838   1 Reply

bio_man

Can someone check the geno/pheno table in my lab and tell me if I did it right?!

Can someone check the geno/pheno table in my lab and tell me if I did it right?!

Just need to make sure I filled it out or did it right, thank you!

The10thDoctor   10392   4 Replies

f_zah1

Can someone describe to me about the Darkfield microscopy?

Can someone describe to me about the Darkfield microscopy?

I need to know how it works, the history, what it is used for, and the advantages + disadvantages of the dark field.

I'll need links and concise but not too short descriptions please.
Thanks to anyone who gives me info.

Smilez   232   1 Reply

n_m_m