Biology

Hey guys, I came across this method to detect death in cells in vitro. It is a very fast and sensitive test. You can check it out in detail through the link: http://marblar.com/challenge/cell-death-detector I was curious, why is this useful? Who wants to detect dead cells?!

This not really a savannah breeding question but my current litter of kittens got me thinking about this. My current litter of kittens have four different species of cats in them domestic, serval, jungle cat, and asian leopard cat. They have the following TWIG's for their wild cat parents I calculated using pedigrees and a few assumptions. Jungle cat 19.5% Asian leopard cat 13.185% serval 7.35% That gives them a total TWIG of 40.035 or 40% wild blood. Now, Intend to keep one male and possibly one from another kitten of this mating which will be repeated. Now, I bet your thinking I must be mad, keeping a male with a TWIG of 40% and expecting to be fertile and make kittens…

Since Craig Venter announced the creation of " or after an , has/will the meaning of an extinct species change? In one sense extinct means no longer living, but if the genome exists is the species really extinct? If we continue to use the term extinct species to mean not currently living on the Earth, do we need another classification for reversibly-extinct species? The reason for this question is its relevance to conservation including laws governing threatened and endangered species. The snail darter controversy is an example of a legal action on behalf of an endangered species that was time consuming and expensive. Snail darters were moved to another river and re…

This story is about the ultimate bird brained rooster, no crow.

Hi all, Now im new to the biology section as it is definitely not my specialty, However i read something in New-scientist today , The issue was dated 18.05.13. And it was to do with consciousness , A special edition. Now there are many many parts to this issue however i Found this part most interesting and thought i would share it with you all and find out your thoughts on the subject. here is a direct quote "Why did you pick that outfit to wear this morning? What made you do your to-do list in that order today? In fact how did you even end up in that job? You may think you know the reasons but they could be a work of fiction. That bizarre conclusion has emerged from s…

Hi guys, I know this is a simple question. But when an artery is blocked it is easier to understand because, less oxygen goes to tissue so, necrosis of tissue. But when a vein is blocked, only the draining is affected, the arteries are still able to supply oxygen, but why does necrosis still occur. I'm assuming it is because when a vein is blocked, it leads to congestion, increased back pressure, which makes it difficult for arterial blood to come and perfuse tissue. Just asked to clarify (I know this is probably a pretty obvious stupid question, but I like to get it clarified). Thanks While we are at it, if u know something about this, please tell me Does the pat…

Hi All, I am new to this forum! I have been having trouble at work, as regards the QC for microbiology media. We prepare our media in-house, and am in the process of validating a method in order to be able to compare it with CRMs. Does anybody know of a good methodology or maybe even a standard to be able to use please? Thanks David

Hi everyone, I couldn't find a 'beginners forum' or something of that nature to put my first post in, so here it is in this one as this forum is related to my first question. Hi all =) Ok, so here is my question, with a bit of preamble to give it validity. Along with my general curiosity on all science topics, from engineering to genetics to astronomy to paleontology, I have developed a new curiosity for the ongoing debate of where life on our planet first came from. I generally understand the theorized process of how chemical compounds became amino acids that eventually became very large coils of proteins that eventually became what we identify as genetic cod…

From what I read on the Internet plants, also called green plants (Viridiplantae in Latin), are living organisms of the kingdom Plantae including such multicellular groups as flowering plants, conifers, ferns and mosses, as well as, depending on definition, the green algae, but not red or brown seaweeds like kelp, nor fungi or bacteria. Green plants have cell walls with cellulose and characteristically obtain most of the energy they need in order to live from sunlight via photosynthesis using chlorophyll contained in chloroplasts, which gives them their green color. Photosynthesis is a photochemical process and as such can be studied using photochemistry. However …

i understand environmental science is a brach of its own but would you class it as a biological science? i only ask as i am having problems picking my modules for my degree. i need mainly biological module s for masters id like to go on to but i'm very interested in environmental science and worry picking this will geperdise my future progress. thank you.

Is it possible to clone a living human through his or her DNA and grow it in the lab until it became a living person? And if it's possible, please tell me the process of doing such experiment. And here's a bonus question, if the question above is possible, can we alter it to become an opposite gender? Let's say that the original DNA was from a male human and that DNA is somehow altered and grown into a living female human. Is such thing possible?

Okay, so a curious topic of conversation, suppose we used another metal in our body replacing iron but having the same/similar effect, what would workable alternatives be? Are either copper or gold any good for example.

Ok in metabolic acidosis, renal compensation is increase in aldosterone, which cause hydrogen and potassium excretion leading to hypokalemia. But in metabolic acidosis transcellular movement occurs and there is hyperkalemia. What is the final result for potassium level. Hyper or hypo?

Does anyone here have a good understanding of the life cycle of the HIV virus? I have a question that is pretty specific... I actually joined the forum to ask it, but the more I think about it the less I think I'll get a response... anyways, here goes. My understanding is that when the HIV virion spills its contents into the host cell those contents consist of the following: RNA genome Reverse transcriptase Integrase Protease The reverse transcriptase transcribes the RNA into DNA; the integrase splices the DNA into the host genome; when the host cell begins its reproductive phase it transcribes the HIV DNA into mRNA; the mRNA is translated into HIV precursor protein…

hi to everybody. i'm new on this forum. sorry for my bad english, but i've a question about my microscope: olympus hsc. i've bought it because i'm an aquarium lover. i've 3 low cost aquariums in my home (assembled with garden gravel and many plants). some times ago i saw many little ''insects'' on glasses with 0,5-1mm lenght. i was so curious about them to search on internet to discover what kind of creatures they are. since that moment i promised myself to buy a microscope to see the invisible world inside my aquariums. i've found this olympus hsc model in very good conditions...but there are some problems: first of all, there isn't a mirror or a light font. i…

I'm okay in biochemistry but not great, so I need someone more knowledgeable to help here. Both gasoline/hydrocarbons and animal/vegetable fats contain mostly long strings of hydrocarbons, although fats also contain a glycerol or other molecule. Cells even have walls composed of a lipid bilayer. So, as the title states, what is it about gasoline/hydrocarbons that make them poisonous while animal/vegetable fats are not? First glance shows that they differ due to a glycerol or other non-hydrocarbon molecule, yet if that's the reason, how does the presence of this type of molecule cause fats to be non-poisonous?

Without Photosynthesis life on Earth will cease. Do you agree or not?

Why are some men a lot stronger, energetic and healthier than others? I mean some men are able to work 10 hours every day, driving long distances and rushing about from city to city without having to eat a lot of food at all and are still strong and energetic while other men, like me, are a lot weaker physically and need to eat and sleep a lot more. I also realized that some men have a pretty high pain tolerance and are not afraid to get injured or even get killed while other men, like me, are pretty sensitive to pain (I have a very low pain tolerance) and are more easily injured. What is the biological or physical explanation for this, if there is any at a…

Hello everyone, Stomach normal epithelium is simple columnar, intestine it is the same. Now in intestinal type of adenocarcinoma of stomach, intestinal metaplasia of stomach occurs. I don't get it , columnar has changed to columnar, how is this metaplasia. Thanks

I'm reading about the spontaneous generation debate between Pasteur and Pouchet and the paper I'm reading mentions that Pasteur used yeast water and Pouchet hay infusions to see whether they would, after being boiled, grow microorganisms upon exposure to air. If you don't know about this debate and spontaneous generation, SG was the idea that organisms could arise spontaneously out of organic or inorganic material. It was believed that fermentation may be an example of this, so Pasteur showed that, no, the microorganisms come from air and they facilitate fermentation rather than being hte byproducts of fermentation (generating spontaneously). So the debate was about w…

I saw that hair is efficient for solar panels. I know that hair is in the ear. I wouldn't be surprised if we found hair in the eye. I'm proposing the sutton fidelity range as the range of quanta that hair efficiently conducts. This range is most likely the most potent information carrying substance our biology has evolved to acquire access to.

Well, i know it is a very simple question. But, i never was told what is their difference Well, all i know is that: DNA: De-oxy ribo nucleic acid RNA: Ribo nucleic acid (correct?) What else can u guys tell me about it?

How to connect Internet directly to brain so that people no need to waste time (1 - 19 years) in uploading info to their brain ( which gets lost as time passes by ,wasting more time in re uploading it), ? By this way people can directly get data from net. Brain should act as a processor, not as a storage + processor. Instead net should act as brain's storage system , the brain's own memory should only be used as a cache memory + ram + secret memories.

Is there a known genetic mechanism through which a given polypeptide can have its amino acid sequence inverted? For example: A DNA sequence is translated into the sequence: N-MKTSTRFLDGYFPVAANK-C -Mutation occurs- Which leads to the production of: N-MKNAAVPFYGDLFRTSTKM-C The obvious problem is that an inversion will invert the codon sequences (ex. CUU GGA-> AGG UUC = LG-> RU). Is there any known mechanism in nature through it is possible to change something like "AAU UCU GAC" into "GAC UCU AAU"? Furthermore, I've been running blast searches using inverted amino acid sequences of arbitrarily chosen proteins to see if I find any interesting matches, but ha…

OK. Transaminase in Mammals. I am particularly concerned conversion of DL-methionine to L-methionine in mammals. Or any animal. Primary Questions Does "Transaminase" exist? Does "Transaminase" convert DL-methionine to L-methionine? Which "Transaminase" converts DL-methionine to L-methionine? Is the aforementioned "Transaminase" encoded in the DNA of an animal? Primary sub-questions will follow as needed.