So popular did the film prove with audiences at the time, Hepworth had to remake it – twice – to replace the original's worn-out negative.
It is Richard Avedon, wearing a negative of a photo of his sister on his bare shoulder for three days, till it printed on his skin.
To avoid and check for cross-sample contamination, all working steps were carried out in separate laboratories and under Captair Bio PCR cabinets (Erlab), gloves and masks were permanently worn, and negative extraction controls were routinely performed.
Fluoride furnace operators normally remained in the furnace area during evacuations, wearing a negative-pressure half-face respirator.
During a 45-min period on 2 March 1980, the patient entered the cooling bay twice to conduct repair work on the conveyor, wearing a negative-pressure half-face respirator.
… Last but not least Mom's Rules of the Road: if she tells you she is on the pill, or if he says he has "tested negative" — wear a condom anyway.
As a consequence of this, two parameters are determined: the positive volume – defining tool wear, and the negative volume – indicating a forging defect, e.g. underfill.
The issue of the rail and wheel contact is one of the most fundamental aspects in the railway system since inappropriate interactions create problems such as wear and a negative effect in the dynamic functioning of the train.
We found that preoperative glenoid wear had a negative influence on the patient outcome after humeral resurfacing for primary osteoarthritis, and the rate of revision arthroplasty was high.
In this study, preoperative glenoid wear had a negative effect on patient outcome after humeral resurfacing for primary osteoarthritis, and the high rate of revision arthroplasty gives cause for concern.
