Rigour (BrE) or rigor (AmE) (see spelling differences) describes a condition of stiffness or strictness. Rigour frequently refers to a process of adhering absolutely to certain constraints, or the practice of maintaining strict consistency with certain predefined parameters.
PLA stands for polylactic acid and is a resin made from corn starch. PLA is used to make clear compostable containers and PLA lining is used in cups and containers as an impermeable liner. PLA is biodegradable, and fully compostable. It uses 65 percent less energy to produce than conventional oil-based plastics and generates 68 percent fewer greenhouse gasses and contains no toxins.
Drawbacks of stand-alone PSA testing for prostate cancer. â¢The prostate specific antigen (PSA) is a protein made by the prostate. For decades the PSA test has been used as a marker for the presence of prostate cancer in menâhigh or rising levels of PSA in blood may indicate the presence of a prostate tumor. However, the PSA test is a non-specific test for prostate cancer.