Proteins, nucleic acids are best example of natural polymers. Similarly cellulose is also a natural polymer which acts as main structural component of plants. Usually natural polymers are composed by condensation polymerisation with the elimination of water molecule.
Drug-Laboratory Test Interactions. False-positive urine immunoassay screening tests for phencyclidine (PCP) and amphetamine have been reported in patients taking venlafaxine. This is due to lack of specificity of the screening tests. False positive test results may be expected for several days following discontinuation of venlafaxine therapy. Confirmatory tests, such as GC/MS will clear that misconception up asap...or if you are not using pcp and your dr is sceptical.
If the nitrite test is positive, it means that you have bacteria in your urine. A common result of increased bacteria in the urine is a UTI. How does the WBC (leukocyte) test relate to a UTI? WBCs (white blood cells), also called leukocytes, are produced by the body in response to the presence of an infection. How should I store AZO Test Strips?