Cell Definition and 899 Threads

What happens if one applies an electric field across a live cell ??

This is what I have chosen I2 (s) + 2e- = 2I- (aq) reduction potential is +0.53 Zn2+ (aq) + 2e- = Zn (s) reduction potential is -0.76 using nerntz I get E = 1.29 - (0.0257/2)(ln (2.24/0.1) E= 1.2500 What would could I use to get the I and Zn ions? Also, would the...

http://www.google.ca/search?q=cache:0j8NdYaQ3L4J:www.foodsafetynetwork.ca/biotechres/activityextraction.pdf+Kiwi+DNA+Extraction+Lab&hl=en The above url is a lab that states that to do a DNA extraction of kiwi the cell membrane is eliminated through liquid detergent and mechincal mashing -...

I am attempting to put together a galvanic cell with a voltage of 2.68 V Here is what I used KCl salt brigde Cu2+ (aq) + 2e- = Cu(s) Red Potent = +0.34 used 1 M CuSO4 Mg2+ (aq) + 2e- = Mg(s) Red Potent = -2.37 used .1 M MgSO4 Nrtz eq E = E - 0.0257/2 (ln Q) It...

Hi, I have a question on cell differentiation: I know that cell differentiation occurs when the cell becomes a specialised cell of a tissue and different genes are switched on and off depends on the types of specialised cell. The causes I am aware of are: When repairment of tissue is...

Hi. What prevents proteins from falling out of cell membranes? This question has been bothering me for sometime... and I cannot find an answer to this. Please help :-p

How to build a cell Phone signal booster out of a copper sheet? Does anyone knows how to build a cell phone signal booster out of a copper sheet? I want to know the theory and calsulation behind it. Thx for anyone that can provide any information regarding these.

hi guys! what types of cells is a mammalian cell? i know this is maybe a "horrible" question, but i find it hard knowing the different cells under this category cell. i have looked in the net, but don't find any site where they explain about this type of cell. so hope for some ideas...

could anybody be kind to explain what is cell division to me please? i only know is that its chromotins duplicated.

Greetings. If you like John Conway's Game of Life you might find this interesting. It is a pattern I have made based on David Bell's Unit Cell. The Unit Cell is a pattern that replicates the action of a single Life cell. So if you tile an infinite plane with Unit Cells you could actually...

Can anyone tell me how the Voltaic cell works? In my textbook(grade 10 India), a diagram with a beaker containing Dilute Surlphuric acid , 1 zinc plate(with negative signs all over it), 1 copper plate(positive signs all over it) and the 2 plates are connectedto a bulb. I want to know why the...

Can anyone tell me how voltaic cell works :eek:

How would I go about finding the APF for a simple hexagonal unit cell. Which is a rectangle. I know one length is a0(HCP) but I cannot figure out the other side of the rectangle. Also, wouldn't the height be the c?

Hey guys! I'm taking a pretty basic cell biology class this semester, our book is "The World of the Cell", 5th edition, by Becker, Kleinsmith, and Hardin. My prof assigned a little homework assignment, it's pretty easy, but I think I'm reading to deep into it. The problem is called...

Hello all, I have this weird idea for a cell phone booster antenna and I thought i would run it past you all here to see if it could work. Where I live, we get really bad reception inside our house so I commonly have to step outside and use my cell phone in the driveway to get a decent...

smalest cell ? what is the smallest cell in the human's body ? regards abc

Osmosis: a. presence of h20 molecules b. presence of a semi-permeable membrane c. direction: from a region of higher concentration to a region of lower concentration * osmosis is a passive transport, which is defined as the movement of molecules without the expenditure of cellular...

I noticed recently that just before my cell phone rings I can hear a 100 Hz or so buzzing from the speaker of a certain radio alarm clock of mine. I have also seen this sort of thing take down factory systems when standing near unprotected control centers. I know one factory engineer that this...

Twice now I have been told that my cell phone has called someone without my knowledge. At first I assumed that I had bumped a button but I show no records of the outgoing calls in memory. I'm still waiting to see if the usage shows up on the bill. I have noticed from time to time that the...

Is it known what the salt conditions are like in the nucleus? For instance, in the cytoplasm [KCl]=100mM [NaCl]=10mM.. would this be very different in the nucleus? Which salts would be important in influencing protein/protein or protein/DNA interactions?

Transport across cell membranes... I was reading my textbook and it said, "Fat-soluble molecules, such as glycerol, can diffuse through the membrane easily. They dissolve in the phospholipid bilayer and pass through it in the direction of the concentration gradient, from a high concentration to...

[FONT=Arial]I was wondering if you could recommend an article that would explain a concept to me. That is: the drawback of fuel cells, reportedly, is that hydrogen is not readily available. However, I am wondering why it is that if the original idea of fuel cells came from reversing the...

http://www.popsci.com/popsci/medicine/article/0,12543,573349,00.html . I try to avoid using cell phones. I figure I'm exposed to enough radiation daily, and using a cell phone is unnecessary. How often do you we hear things we want to hear on cell phones anyways? It's usually news about...

Biochem help :(?? Hi :smile: I have seen great people on this forum, can anybody please help me with this question? Q- The majority of cellular proteins and RNA are synthesized throughout the cell cycle and are only interrupted briefly during M phase. Synthesis of which of the following...

Hey guys anyone have an idea for a hydrogen fuel cell. I was thinking about one in which a battery first is used to split water into h2 and o2 using electrolysis. And then the components can be combined to produce energy. Anyone have any other ideas or links? Thanks.

I know there are trillions of cells in an adult human body but how many atoms are in each cell?

How exactly are the epithilial cells in the small intestines adapted for their specific function? How are palisade mesophyll cells adapted? Thanks for any and all help.

Is there any organism that has only one cell ? If any, what is that ? and how can it lead its life ? Does it need to develop whereas it is undividable ? Thanks Regards,

From what I understand about fuel cells, they generate power by influencing electrons to move themselves around an ion-conducting material to get to the other side. While the electrons make there way from one side to the other, they supply DC in the middle of there journey. But I am not quite...

I bought a new cell. I never let the power go below 80%. Now the cell(power) has become weak. It can't even withstand for 5mins with full power. What was the mistake i made ? Did i overcharge my cell ? I don't understand the chemistry behind that! Can anybody explain ?

i was once heard that life begin with one cell, and that cell is made up by chemicals water and other substence from aerolites. this is proved by someone i don't remmber. and then that cell was evolved (some how), and become so many species we have now, so that cell was the...

Now for another question on the same subject You all know how in the human body the oxygen binds to the iron compound inside the hemoglobin. and that carbon monoxide has a 200 to 1 affinity to oxygen within the hemoglobin. But anyway my question is if The Iron inside a cell pulls and holds on...

I'm doing a persuasive speech on stem cell research for my English class. I am defending stem cell research; I'm for it. But some people aren't, and of course, I have had to address that in my speech. But the main argument (against stem cell research) is that it is immoral. It is not moral...

Do you support or agree with stem cell research? Why?

Hi all, Before I ask a Q about blood cancers, can I just check - is it right that cell division of blood cells takes place only in the bone marrow (and not in the bloodstream or anywhere else)? Thanx Charles

A cell wall is a rigid structure, so I wonder how organisms with such a structure are able to take up nutrients from their environment? If there is only a plasma membrane, vesicles can be formed which pinch off and thus take up nutrients from the environment and merge with other vesicles to...

Is it at all possible through genetic engineering, or through physically transplanting one, to add more mitochondria, vaculous, ribosomes etc. to existing cells, assuming they were simmilar enough to the current ones to not be viewed as invaders?

Just seen an interesting documentary about the breakthrough in Cancer treatments. The programme gives a brief discription on cell division and how doctors think the way forward for treatment is changing due to the Understanding of Genetic (genome) discovery. Anyway I was fascinated by the film...

I was thinking about making a cell phone on my own, but I don't know where I can find sufficient information and the requied knowledge to start. Can anyone please give me any useful advices and information? All helps are appreciated.

I am wondering about the differences between plant vs animal cell division, mainly about cytokinesis. Is the following a true generalization? Plant daughter cells separate by forming membrane vesicles that line up in the center of the cell and fuse to form new plasma membranes. Animal...

OK, i need to know everything about the Eukaryotic Cell Cycle : In detail. So this is whereI am going to post what I learn as I go, and where any of you lovely people can post stuff that you know that you think might help me If you have any links to good cell cycle websites, then feel free...

It always amazed my how a mice is similar to a human, but all the systems are in miniature. Why doesn't a mouse grow as big as a human? What is the mechanism regulating the organ sized, a certain number of cells? A certain size? It actually turns out that somehow the physical size is known, not...

The title sounds strange, but that is what the life of a cell will eventually experience. Cells from multicellular organisms are specialized in performing suicide, it is actually a very important mechanisms of survival of the organisms as a whole. The reason is, that programmed cell death, or...

Please help me with this?? Cell reproduction. Hi, Can any1 tell me the difference between fission and mitosis in cell reproduction? Also how do amobae reproduce? Thanks for any help you can offer. Reb

This cell organelle consists of two granule-like ~centrioles~ and is found in animal cells only. It helps in cell division. Name, please!

Hey all, New guy on the site. Just to start off, I'm 15 year old who enjoys reading (mainly physics). Now, as many may already know, current crystaline silicon has been proven to have a total efficiency of 25%. Some companies have even quit on their thin film solar cell technology due...

Hi, I just need a proper explanation as to why the internal resistance of a dry cell battery increases as the battery is used? Also, what would cause the internal resistance, if there is any, in a power pack? (A power pack is a device that allows electricity from a powerpoint to be...

The number one failure mode in cell phones is battery terminal oxidation. If you visit a cell phone dealer, he/she will tell you that about once a year you should purchase another $40 battery. This is bullsh:t. I have found the best solution for cleaning battery terminals while maintaining...

[SOLVED] Can my fuel cell rust I just bought the THames and Kosmos Fuel Cell car and experiment kit. I used it to day and their is still a small amount of water left in the fuel cell. will this make it rust. here's a link to the car http://www.thamesandkosmos.com/store/fuelcell1.html...