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Bob doing the last oil checks before the engine is started Because of the extreme cold temperatures of the Antarctic its not uncommon for pipes and associated equipment to freeze , even though protection methods are used such as insulation and heat trace systems occasionally they are not sufficient to keep equipment from freezing , last week we had temperatures of -40 c and the wind blowing from the West , this caused one of the grifters to freeze , grifters are basically a macerator and are used to liquefy human waste . Pain resulting from hip joint pathology is usually felt in the groin and anterior thigh . The process of carbonising plant material appears to lock in the life 87Sr / 86Sr fingerprint of the plant and protect it from subsequence digenetic alteration . Since my release I have been suffering from anxiety , constant fear , and depression .