### isolation:

Social isolation
* Abused women are often at home with dependent children.
* Some social isolation is experienced by adults.
* can be a drawback, and the lack of nonverbal cues can hinder communication
  - more devastating than the person's impairment
  - impact nutrition or contribute to alcoholism, thereby impacting mental state
  - lead to depression, even years after the onset of stroke and aphasia
* common obstacle to proper nutrition
  - problem for many older adults
* has a huge factor in depression.
* implies a lack of social networks, absence of visitors and no support systems.
* includes no eye contact.
* is an early and major hurdle faced by most immigrant youths
* is one factor many women struggle with
  - of America's biggest problems and the cause of untold psychological stress
  - probably the most common symptom for depression
* is the most pressing problem most disabled persons face
  - single greatest risk for suicide
* predictor of child abuse.
* prescription for decline and depression.
* proven risk factor for child abuse.
* rearing effects in monkeys vary with genotype.
* risk in suicide.
* tends to exacerbate memory loss.

Solitude
* allows people to just sit back under a tree and contemplate.
* are emotion
  - peace
* brings discomfort and fear.
* enhances self-awareness.
* expresses the glory of being alone.
* is isolation

Viral isolation
* is required from all chains of transmission.
* is the preferred method of laboratory diagnosis
  - test used commonly for identification of persistent infection

Isomer
* are a source of variation among organic molecules.
* are compounds that have the same chemical makeup but are mirror images of each other
  - which have the same molecular formula but different arrangements of atoms
  - with the same formula but different structures
* are compounds with the same molecular formula but different chemical structures
  - formula, but different arrangments of atoms
  - molecules that have the same chemical formula, however different structural formulas
  - one or to more molecules that contain the same atoms with different arrangements
  - variations in the molecular structure of the same composition
* can never be isotopes, isotones, or isobars.
* differ from each other in their physical and chemical properties.
* have atoms bonded in different orders.
* have different physical and chemical properties from each other
  - the same molecular formula, but a different arrangement of atoms
* make a big difference.
* occur mostly in organic chemistry.

### isomer:

Constitutional isomer
* have the same atoms, but they are joined differently.
+ Stereochemistry
  * In chemistry, some molecules have more than one isomer. This means that molecules can have different forms, even though all the forms made up of the same atoms. There are two kinds of isonomers. Constitutional isomers have the same atoms, but they are joined differently. Stereoisomers have the same atoms, they are joined the same way, but the atoms are arranged differently in space. An important part of stereochemistry is the study of chiral molecules. These molecules look almost identical, except that one molecule is the mirror image of the other.

Geometric isomer
* are important in vision.
* differ in physical properties such as melting point and boiling point.
* occur from the inflexibility of the double bonds, unlike the single bond.
* refers to which side of the ion atoms lie.

Optical isomer
* are compounds that are non-superimposable images of each other
  - stereoisomers where the molecules are mirror images of each other
* differ in the arrangement of four groups around a chiral carbon.
* have opposite effects on plane-polarized light.

Structural isomer
* are isomers where the atoms are connected differently in the two molecules.
* have the same molecular formula but different structural formulae.
* vary in their covalent bonding arrangement.