0
votes
0answers
7 views

What kinds of human cells does saliva contain?

I have heared that saliva contains some human cells. What are they?
1
vote
1answer
11 views

What does units/mg mean for Streptavidin

I got streptavidin for surface reaction. The label says "biotin binding: 16 units/mg". What does units/mg mean? Does it mean "1 mg biotin can bind to 16 units ...
0
votes
0answers
5 views

Are there any conventional standarts to microarray experiments data representation to biomedical journals?

Are there any conventional standards to microarray experiments data representation to biomedical journals and thesis committee? Should I save raw data or send them log and prenormalized data sets? Is ...
0
votes
0answers
3 views

What is the adequate rational approach and software to visualizing VCF genome comparison files?

What is the adequate rational approach and software to visualizing VCF genome comparison files? Have >100 VCFs with errors from tuberculosis whole genome comparative research, need to filter files and ...
0
votes
0answers
4 views

How to retrieve full gene names list and Entrez gene IDs and other annotation information from HUGO gene name list (in R or any)?

How to retrieve full gene names and Entrez gene IDs and other annotation information from HUGO gene name list (in R or any other software or language)? Is it possible ice versa: having full gene ...
6
votes
2answers
8k views

Blood Pressure: Significance of difference between systolic and diastolic

I wanted to understand what is the difference between systolic and diastolic readings of blood pressure. I understand 120-80 to about 100-60 is considered normal but does the difference in the two ...
1
vote
1answer
33 views

How does Haloxyfop control young grassy weeds in fields of broadleaved crops?

Haloxyfop (haloxyfop-P-methyl) is a selective herbicide used to control grassy weeds in young stages. The mode of action (iirc) is basically inhibition of acetyl CoA carboxylase (ACCase). Why does ...
2
votes
1answer
33 views

Speed of effective lymphatic drainage?

Lymphatic drainage occurs from many portions of the body: To venous angle: head axillary lymph nodes hands abdomen legs (I think legs' drainage goes through abdomen) The speed of the lymph ...
2
votes
1answer
20 views

Are codons that map to the same amino acids interchangeable?

(disclaimer - I'm just getting interested in genetics so sorry if this is an obvious/silly question.) I see from http://en.wikipedia.org/wiki/Genetic_code in the section on the RNA codon table a ...
0
votes
0answers
2 views

Swellings with Variegated consistency

I am interested in knowing the names of all swellings with variegated consistency. I have come across the following: Malignant swelling with partial necrosis Caseated tuberculous lymph nodes ...
6
votes
1answer
57 views

How does MSMA kill crabgrass with only minimal damage to lawn grasses?

I use MSMA (Monosodium methyl arsenate) to kill crabgrass in lawns. I am not certain of the mode of action. How does this chemical work? How does it target the annual grassy weeds, without ...
3
votes
0answers
49 views
+50

How does Halosulfuron-methyl kill nutsedge, while leaving lawn grass and most weeds undamaged?

I use Halosulfuron-methyl to control yellow and purple nutsedge in lawns. This chemical acts by interfering with the acetolactate synthase enzyme, which quickly slows cell division, and growth at all ...
2
votes
0answers
27 views
+50

Why doesn't Fenoxaprop-P-ethyl damage cool season lawns?

For controlling bermudagrass, Cynodon dactylon, a serious perennial grassy lawn weed in my area, I use the herbicide Fenoxaprop-P-ethyl. It kills the bermudagrass rather well, without damaging the ...
3
votes
1answer
50 views

How can a plant resist glyphosate (Roundup) herbicide?

In my area, the most common weeds that strongly resists (N-(phosphonomethyl)glycine) (glyphosate) are the horseweed, or mare's tail, Conyza canadensis, and Canada thistle, Cirsium arvense There are ...
1
vote
1answer
173 views

Why doesn't the herbicide 2,4-D damage lawn grass?

I sometimes use 2,4-Dichlorophenoxyacetic acid to control broadleaved weeds in lawns. It is selective, and quickly kills the dicot weeds, while other plants are unharmed. 2,4-D is a synthetic ...
0
votes
2answers
22 views

mRNA Transcription from Nuclear DNA

How does a cell "know" the coding strand vs. the non-coding strand of DNA during transcription of mRNA?
-4
votes
1answer
36 views

Can genetic engineering be performed without a laboratory setting?

I'm becoming more interested in genetic engineering as I learn more about it, and it's becoming more and more apparent that there's very few resources on genetic engineering at home. A similar ...
1
vote
2answers
33 views

What are the differences between a benign tumor and swelling?

What are the differences between a benign tumor and an injury related swelling? And can swellings due to injury turn into a benign tumor?
2
votes
0answers
10 views

What is the most complex biological organism (or precursors) that we have been able to synthesize from raw materials?

In the Miller–Urey experiment they produced several amino acids. I'm not sure if there were other similar experiments that got further. ...
0
votes
1answer
11 views

Dehydration from caffeine, alcohol and other

Tea, Coffee, Beer, Coke etc… I wonder if the benefit from amount of fluid we get from them is bigger or smaller then the handicap of dehydration. In other words it is worth to drink them if we want ...
1
vote
1answer
31 views

Dehydration by a tea, coffee, beer etc

For the long time I am trying to find out if the following is truth: They say that some beverages dehydrates. I heard that about tea (sometimes green, sometimes black, sometimes both), coffee, beer ...
6
votes
0answers
38 views
+50

Why doesn't Clopyralid damage cool season lawn grasses?

I use Clopyralid (3,6-dichloro-2-pyridinecarboxilic acid) to kill broad leaved weeds in lawns. From my understanding, it works by mimicking an auxin which affects plant growth. Naturally this pulls ...
6
votes
5answers
435 views

Relationship Between Evolution and the Increase of Entropy of Earth

I was confronted by this question: Biological evolution of life on Earth, from simple prokaryote-like cells to large, multicellar eukaryotic organisms, A) has occurred in accordance with the laws ...
2
votes
1answer
23 views

How does menstruation proceed during one period?

I'm simplifying things here: A. Does a woman bleed constantly, like a drop every 10 minutes? Two hours without pad or tampon and your underwear is dirty? or B. Does a woman bleed suddenly a ...
0
votes
0answers
13 views

Transfect Mammalian Cells with Single Stranded DNA?

Agrobacteria can deliver parts of their DNA to plant cells as T-DNA, transfer DNA. This DNA is delivered as a single strand and can be integrated into the plant genome or can be converted to a double ...
-2
votes
0answers
23 views

Genetic Code Question [on hold]

The following template strand contains codons encoding the beginning part of a polypeptide. Which of the following amino acids is the fourth amino acid found encoded from the beginning/start of the ...
-1
votes
0answers
14 views

A lifeform similar to known lifeforms, with one difference [on hold]

What would the feasibility be of a lifeform where sucrose serves the purpose of glucose, and what other differences might be necessary? Perhaps some way to get around spontaneous glycation issues?
4
votes
1answer
38 views

After how many generations descendant is not more related to ancestor, than to a random individual in an ancestral population?

Descendant of n generation has on average 1/2n DNA of ancestor. (For example children have 1/2 DNA of parents and 1/4 DNA of Grandparents, After 10 Generation 1/1024 DNA and after 100 Generations ...
2
votes
1answer
214 views

What are hot spots on human body?

Recently I have just discovered that a certain amount of the mobile phone frequency can be absorbed by human tissues. For example, this is the SAR info of iPhone 4s: Head: 1.180 W/kg 1 g Body: ...
3
votes
1answer
53 views

How long does it take to form a peptide bond?

What is the time taken to form a peptide bond in vivo or in vitro? It isn't mentioned in my course on protein structures. I was just curious to find out if any time scale is known? Given that ...
0
votes
0answers
29 views

Phenotype choice for one of a MZ twin pair in a genetic association study

I was having a discussion with a colleague and this question came up... It is commonplace in molecular genetics studies to only genotype one of a pair of monozygotic twins (and then implicitly impute ...
5
votes
1answer
66 views

How can we calculate the minimum sustainable number of the panda population?

I have a degree in Biology so I'm a little embarrassed that I never learned this, but... How do we know 1600 Pandas isn't enough? I know that we have historical numbers (although I couldn't find ...
2
votes
1answer
40 views

How do C. elegans manage nutrition?

If there is ample amount of food, do C. elegans worms know when to stop eating or do they store extra energy? Could they put this extra energy to use by moving faster or putting more eggs?
4
votes
2answers
1k views

Is there an organism which has a common English name which overlaps with another organism's scientific name (or vice versa?)

Many organisms have their common names identical to their scientific names. For example, there exist apes of the genus Gorilla known commonly as gorillas, and plants of the genus Delphinium known as ...
2
votes
1answer
21 views

Can an upper forearm amputee correctly control the Median and Ulnar nerves

I'm an engineer who is looking to build a robotic hand for people without their upper forearm(from center of forearm in direction of hand), controlled by the Thalmic Myo(an EMG sensor). I am first ...
4
votes
0answers
24 views

Non-harmful bacterial invasion of cells

There are bacteria that can enter body cells as parasites. Could it be that some of these are benign, such that the guest will not kill the host cell it lives in (in human)?
2
votes
0answers
29 views

eradicating h.pylori naturally

This question is not to discuss whether substances with anti-h.pylori agents works or not, or the pros and cons of such but from a medical perspective. Assuming that one manage to control, reduce, or ...
4
votes
1answer
195 views

RNA isolation from Drosophila head

I need to isolate RNA from Drosophila head. I basically chop the head off and first homogenize it with a homogenizer (similar to this: ...
3
votes
0answers
15 views

How much total RNA can be extracted from Drosophila brain

I am wondering how much total RNA could be extracted from a single D. melanogaster brain. I could not find this information from the literature. The closest hit was this paper: ...
2
votes
2answers
52 views

Converting fmri data to association matrix

I am currently working on a new tool for the analysis of (large) weighted networks. Association matrices (correlation matrices) as obtained from fMRI data are perfect examples of the kind of data I am ...
1
vote
0answers
10 views

More general usage of the term 'congener'

In taxonomy the term 'congener' refers to two species within the same genus. In more colloquial usage, it can refer to any two objects within the same category. Is there a way to refer to related ...
8
votes
3answers
358 views

Organism identification, what is this?

Im trying to find out what this is, see image below. Im thinking these are either some insect eggs or some sort of mosslike plant. The substance is stuck to a steel pillar, outside, about 5 feet ...
3
votes
1answer
59 views

Are nutrients absorbed in human esophagus?

Following this question regarding absorption in human oral cavity (sadly not yet fully answered), I'm curious if any nutrient absorption occurs during the descent of food through the esophagus. And ...
1
vote
2answers
102 views

How does DNA damage cause ageing in yeast?

As I understand it, in yeast ageing there is daughter cell and mother cell. The daughter cell is has newly "fresh" DNA and mother cell dies after some counts of replication. What happens to the ...
3
votes
3answers
26 views

Kinetic Vs Potential Energy in Biochemical Contexts

This question is causing great confusion in my head. Which of the following is an example of potential rather than kinetic energy? A) the muscle contractions of a person mowing grass B) water ...
2
votes
2answers
33 views

Conversion of glucose to glycogen

Why is excess glucose, as a glycogen, stored in only a limited amount as compared to the lipid in our body? Why is mature glycogen arranged (polymerized) in 12 tiers polymer?
-1
votes
0answers
37 views

What is it a swell in the body? [on hold]

When I get hurt, for example injuries to a bony part causes it to swell...like a little mountain. What is it actually? Does it happen in other places on the body?
-1
votes
0answers
18 views

Microscopic Organism [on hold]

I was looking under my microscope and saw this... I asking about the long organism with a circular head... I observed it moving and wanted to find out what this was. Thank You
4
votes
1answer
28 views

Plural of “dibamus”

Migrated from English site. Dibamus is a genus of legless lizards in the family Dibamidae, of the infraorder Dibamia. Genera are usually given in singular, so what is the correct plural of ...
4
votes
1answer
27 views

Mechanism of Decorticate & Decerebrate Posturing? Also why is only Decorticate Rigidity a misnomer?

I read these two from various books, and got confused. The confusion is - Reticulospinal tracts control gamma motor neurons. Gamma motor neurons control tone of muscle. In decerebrate rigidity, the ...

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