### residue:

Pesticide residue
* Some pesticide residues can contaminate freshwater ecosystems for generations
  - do occur in foods consumed
  - kill pollinators
* can be dangerous to sensitive crops
  - get on work clothes
  - transfer from contaminated clothes to other clothing during washing
* concern to some consumers.
* have harmful effects.
* remain in the environment for many years
  - only on the surface of produce

White residue
* Some white residues reflect sunlight.
* is all over objects in the home.

Resin
* All resins are insoluble in water , as distinguished from the water-soluble gums.
* More resin is produced in tropical than in temperate climates.
* Most resins are hydrocarbon-like and burn
  - polymers
  - provide very good resistance to chemicals and corrosion
* Some resin absorbs potassium.
* Some resin acts as electric insulators
  - contains acid
* Some resin is produced by trees
  - synthesized from petroleum
* Some resins are difficult to clean
  - more susceptible to impact fusion
  - soluble in both alcohol and turpentine
  - contain essential oils and are used in incense and aromatherapy
* act as a preservative and make it harder for insects and fungi to break down the tree.
* are also soluble in alcohol , ether , and other organic solvent s
  - highly malleable but become rigid when cooled
  - ingredients that add depth, gloss and hardness to the film of a nail polish
  - liquids which turn into solids through a chemical reaction
  - often the weak link in an organic coating system
  - soluble in alcohol, ether, and many hydrocarbons but are insoluble in water
* are the basic building blocks of architectural coatings
  - source of many traditional perfumes, including frankincense and myrrh
  - used in the manufacturing of paints, oinments and varnishes
* can replace bismuth alloys in holding jigs for machining
  - slow the progression of atherosclerotic lesions
* cause cholesterol to be taken out of the blood and converted to bile.
* come either dry or preswollen
  - to the surface of the pads and form a coating that affects braking ability
* cure to a high-gloss finish and are easy to sand.
* exudes from the cones, and after some years the scales fall away from the axis.
* fills cracks.
* flows from sources.
* has natural sheen
* is an organic compound
* is located in ink
  - wood
  - organic matter
* often flow over and capture small insects.
* penetrates into the demineralized dentin to form a mechanical bond.
* present a different problem, because they are soluble in alkyd paints.
* reduces transpiration.
* remove bile acids in the intestine before they get back into the blood stream.
* retains sheen.
* tends to be a more expensive printing medium
  - gum up blades and cutting tools
* undergoes chemical reaction
* work by increasing the clearance of cholesterol-rich lipoproteins from the plasma.
+ Varnish, Resin: Materials

### resin:

Epoxy resin
* Some epoxy resins produce an asthma-like condition.
* allows for rigidity and strength.
* are one of the most frequent causes of occupational allergic contact dermatitis
  - sensitive to a heat, despite heat treatment
  - very effective moisture barriers
* cause allergic sensitivity reactions on the skin.
* is almost totally transparent when cured
  - synthetic resin
  - used for both sealing the wood and laminating the fiberglass cloth
* leaches fewer chemicals, but is four times more expensive than polyester.
* make excellent adhesives, consolidants, and gap-fillers.
* makes great glue, is used in composite structures, and can be used as a varnish.
* polymerize through a chemical reaction after being mixed in the correct proportions.
* possess exceptional chemical resistance and adhesion.
* produce very firm products and so are used for thin, transparent body or organ slices.
* used in two-part adhesives are thermoset plastics.