Gamma delta T cells (γδ T cells) are T cells that have a distinctive T-cell receptor (TCR) on their surface. Most T cells are αβ (alpha beta) T cells with TCR composed of two glycoprotein chains called α (alpha) and β (beta) TCR chains. In contrast, gamma delta (γδ) T cells have a TCR that is made up of one γ (gamma) chain and one δ (delta) chain. This group of T cells is usually less common than αβ T cells, but are at their highest abundance in the gut mucosa, within a population of lymphocytes known as intraepithelial lymphocytes (IELs).The antigenic molecules that activate gamma delta T cells are still largely unknown. However, γδ T cells are peculiar in that they do not seem to require antigen processing and major-histocompatibility-complex (MHC) presentation of peptide epitopes, although some recognize MHC class Ib molecules. Furthermore, γδ T cells are believed to have a prominent role in recognition of lipid antigens. They are of an invariant nature and may be triggered by alarm signals, such as heat shock proteins (HSP).
There also exists a γδ-T-cell sub-population within the epidermal compartment of the skin of mice. Originally referred to as Thy-1+ dendritic epidermal cells (Thy1+DEC), these cells are more commonly known as dendritic epidermal T cells (DETC). DETCs arise during fetal development and express an invariant and canonical Vγ3 Vδ1 T-cell receptor (using Garman nomenclature).
Honestly i have very little idea.
F * delta t = p
F * delta t /m = v
So i know the speed of the rod
And i know that however high the rod is supposed to go, when its back down it should have done excactly one revolution.
I have the feeling that I should
So probably i have to use something like...
Trying to narrow down what type and size radiator and flow of both the water and air I should be looking at that would give me my best heat exchange efficiencies, if I want to input 50F water into a radiator that will have 100F air (60% RH) blowing through it and my goal here is the cooling down...
Homework Statement
A 3kg projectilce traveling at 100 m/s is stopped by being shot into an insulated tank containg 100kg of water. If the KE of the projectile is completely convereted into thermal energy, how much will the temp of the water increase in degrees celcius? The standard heat of...
Homework Statement
Lauryl alcohol is obtained from coconut oil and is used to make detergents. A solution of 5.00 gram of lauryl alcohol in 0.100Kg of benzene freezes at 4.1 degrees Celsius. What is the molar mass of the lauryl alcohol?
Kf for benzene = 5.12, Freezing point of benzene is 5.5...
Homework Statement
Two isotopes N1, N2. You are given the value of the proportions N1(t1)/N2(t1) and N1(t2)/N2(t2). From this calculate Δt.
Homework Equations
dN/dt = -λN
The Attempt at a Solution
Solve dN1/N = -λdt and dN2/N = -λdt
obtain: N1(t2) = N1(t1)exp(-λ1(t2-t1)) (1)
and N2(t2) =...
For part number 5, it says to make sure that each ΔT is positive. Why is this? Couldn't it be a negative? Or does it have to be positive since if it wasn't you would be getting heat going in the wrong direction? Like the one substance would be gaining instead of losing the heat? Which would...
I'm a high school engineering physics student , my name is Nathaniel and I'm joining physics forums because I'd love to read about new things(New to me). I plan on having my own businesses in aerospace, architecture, mechanical, and electrical engineering. I want to achieve a PhD in aerospace...
Homework Statement
Delta d = 0, v1 = 5.2 m/s, a = 9.8m/s^2 (down) delta t = ?
Homework Equations
d = v1 x t + 1/2 x a x t^2
The Attempt at a Solution
0 = (5.2 m/s) x t + 1/2 x (9.8 m/s^2) x t^2
0 = t(5.2m/s - 4.9 m/s^2 x t^2)
This is a sample question and states the answer is delta t = 0 or...
I am working on an experiment where I need to measure the Delta T across a heat ex-changer. I have two independent T Type thermo couple, one at the inlet and the other at the outlet. Both tied to an Agilent data logger. I normally put the data into an excel sheet and generate Delta T = T1 - T2...
With Δt = γ ( Δt' + v Δx' ) For calculating delta t for stationary twin with values of traveling twin.
Is it conventional that velocity (v) outbound is positive and distance (x') is negative.
Then at turnaround point sign of velocity changes to negative. And for inbound v is negative and...
I know delta means change , but I don't what the difference between Δv/Δt vs dv/dt is ?
I am at the noob end of calculus so trying to grasp how to interpret things like dv/dt or what what dv would mean if it were standing alone.
TIA
Greetings! I am confused with the difference between Δf, δf, and df. I think Δf is a difference between two values, while df and δf refer to infinitesimal change (but I do not know the difference between the two.) Can anybody explain the difference? I am studying solid state physics (I am...
Homework Statement
Use the law of conservation of energy to calculate the temperature increase expected from energy transferred to internal heat of the water.
There is more than one way to do this. Consider a mass, m, of water which falls over the cascade. If you wish, you may take the mass...
Hi! Thanks for your interest in this this post :D!
So two reactions I performed were: A) Adding 50 cm3 water to 0.025 moles CuS04 and measuring ΔT.
B) Adding 50 cm3 water to 0.025 moles CuS04.5H2O and measuring ΔT.
Well turns out the calculations were wrong, since I apparently didn't get...
Well, I understand q = mc∆T, along with q = mHv and q = mHf
What I don't understand is this graph:
http://dinosaurtheory.com/phase_change.jpg
Well, I mean, I understand THAT graph.
Here's what I don't understand:
Today in chemistry, we received a very similar graph, but the X-axis was...
Hi folks, I am new to physics forums , an engineer by profession, I have newly developed some interest for pure physics, can someone please enlighten me on the violation of energy conservation by the time energy UP? The way I understand it the principle only puts a LOWER bound.
Is...
You see the variables in the kinematic equations expressed as different things sometimes such as t, delta t, dt; or d, delta x, dx; What are all the different forms of the kinematic equations with these different variables? Do you approach certain problems with certain forms or can they all...
Delta T > To?
I was working on the derivation of the time dilation of Eisteins Special Theory of Relativity, when I realized that your change in time from the final equation is actually higher than the time of the observer at rest. Now I understand why the time an object traveling close to the...
This question could have been posted in qm or gsr but since it is so versitile i'll post it here.
Is there a smallest \Delta T?
ex.
year => minutes => seconds => atto seconds etc.
Lets say I'm given a 'specific heat, density, currenty density J, and the time that J exist, how can if find the the change in Temperature? My main problem is I don't know how to start the problem, a couple pointer in the right direction would be great.
Thanks
Philip