polar


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Related to polar: Polar coordinates, Polar bonds

po·lar

(pō'lăr),
1. Relating to a pole.
2. Having poles, said of certain nerve cells having one or more processes.
[Mod. L. polaris, fr. polus, pole]

polar

/po·lar/ (po´lar)
1. of or pertaining to a pole.
2. being at opposite ends of a spectrum of manifestations.

polar

Etymology: L, polus, pole
pertaining to molecules that have atoms bearing substantial partial electric charges that are not distributed symmetrically. These molecules are hydrophilic, tending to attract or aggregate with water. Polar substances tend to dissolve in polar solvents. Compare nonpolar. See also pole, polus.

polar

Chemistry
adjective Referring to the uneven distribution of positive and negative charges in small molecules, resulting in an electric dipole moment.

po·lar

(pō'lăr)
1. Relating to a pole.
2. Having poles; said of certain nerve cells having one or more processes.
[Mod. L. polaris, fr. polus, pole]

polar

Of a molecule or chemical group whose electric charges are separated so that one end is positive and one negative (forming a dipole). Cell plasma membranes are made of a double layer of phosopholipid molecules each containing a polar head group with a strong affinity for water (hydrophilic) and a non-polar hydrocarbon tail that avoids water (hydrophobic). The polar head groups in both layers are oriented outwards in the membrane so as to form both free surfaces. So, in this context, the term ‘polar’ is used to refer to a hydrophilic chemical group, and ‘non-polar’ refers to a hydrophobic group.

polar

situated at one end of a cell.

polar

1. emanating from or pertaining to a pole.
2. being at opposite ends of a spectrum of values.

polar bodies
1. the small cells consisting of a tiny bit of cytoplasm and a nucleus that result from unequal division of the primary oocyte (first polar body) and, if fertilization occurs, of the secondary oocyte (second polar body).
2. metachromatic granules located at the ends of bacteria.
polar bond
a covalent bond in which the electron pair is held unequally by two bonded atoms.
polar spongioblastoma
an astrocytoma with a predilection for the optic nerve and pons.

Patient discussion about polar

Q. Can bi-polar be treated with acupuncture and Chinese medicine? Any help would be appreciated. I am a bipolar. I always get side effects from the meds being prescribed by my psychiatrist. I feel better one day but the very next day I feel moody and have outbursts even on meds as if I am not after them. I wish to follow a different system of treatment. Can bi-polar be treated with acupuncture and Chinese medicine? Any help would be appreciated.

A. Do a lot of research before coming off your meds. You should consult your doctor about how to come off your meds safely. First arm yourself with information about what the effective treatments are and how to get those treatments.

Q. My brother-in-law named Jacob has bi-polar schizophrenia; please help us by giving some solution for this… My brother-in-law named Jacob has bi-polar schizophrenia; he is currently on his medication and takes them faithfully in a positive mood. We have a hard time communicating with each other and it's destroying our marriage, please help us by giving some solution for this…

Q. Is spending money irresponsibely a sign of impending manic attack? My 32 years-old husband is known to have bi-polar disorder, but for the last ten years he has been on lithium treatment and had no attacks. Last week he bought some very expensive things to our home, without asking me (we usually discuss these things before we do anything). Does this mean he’s getting a new manic attack? Other than that purchase everything else is normal, and he appears and behaves as usual. I don’t want to take him for the psychiatrist just for spending some money.

A. Spending money is not a unique character of bi-polar people... Maybe it was a bit less calculated action. If he has manic attack, usually there'll be more things that would tell you about it.

More discussions about polar
References in periodicals archive ?
WWF's polar bear conservation initiatives Between 20,000-25,000 polar bears survive in the wild.
2011: A global climatology of favourable conditions for polar lows.
Kristin Laidre Polar Science Center Applied Physics Laboratory University of Washington 1013 NE 40th Street Seattle, Washington 98105-6698, USA klaidre@apt.
The researchers think that the genetic traces of recent intermingling means that polar bears were driven into brown bear ranges by previous warming events.
Polar tested its products in southern grocery stores before investing in the Georgia facility.
Beyond global warming, other risks to polar bear populations include toxic contaminants in the surrounding environment as well as in the fatty tissue of the prey they rely on, conflicts with shipping, stresses from recreational polar-bear watching, oil and gas exploration and development, and overharvesting through legal and illegal hunting.
Unfortunately, we do not know the polar bear's reaction to this bias because he is not picking up his mobile phone.
Yet the tragedy is that, even in the wild, polar bears are now facing an unprecedented threat to their existence.
Polar bears have survived previous Arctic warming periods, including the last warm stretch between ice ages some 130,000 years ago, but some experts say that nothing in the species' history is likely to match the extent of warming and ice retreats projected in this century and beyond, should emissions of heat-trapping gases continue unabated.
The polar bears are just pawns in the power struggle.
The area's polar bears felt the heat: Scientists came across four polar bears that had drowned, apparently exhausted from swimming because there was no thick sea ice on which they could rest.
The viewing building is indoors and adjacent to the bear enclosure, but the wading pool is outside, where one can "swim" with the polar bears if so desired.