Sentence examples for ppm for a from inspiring English sources

We may get a day or two reprieve in the next month, similar to August when Tropical Storm Madeline blew by Hawaii and knocked carbon dioxide below 400 ppm for a day.

The total dissolved material per litre of soil solution released is about 60 ppm for a solution initially equilibrated with a typical soil carbon dioxide content.

The Zn concentration in CZProt and SZProt was 460 ppm for a total intake of 100 ppm daily as a proportion of total diet.

The novel, liquid-cooled compact reactor with distributed air-side feeds meets its goals in reducing the CO content in the reformate from 1% to around 50 ppm for a total flow corresponding to a load of 1.5kWth.

Doloma dissolution in water was investigated and calcium concentration was increased from 0.72 (pure water) to 2.905 ppm for a contact time from 4 h between the fiber sintered at 1250 °C and pure water.

Channel catfish (75 g) were exposed to concentrations of metomidate ranging from 0.5 to 16 ppm for a period of 60 min. At 16-ppm metomidate, mortality occurred in 65% of the catfish.

Fractions A and B were diluted with water to three different concentrations: 49, 195 and 778 ppm for Fraction A, and 46, 182 and 726 ppm for Fraction B. At least 10 second-instar mosquito larvae were introduced to 10 ml of each concentration in a glass jar covered with a nylon mesh.

In this investigation, three ZrC single crystals have been oxidized at high temperature and in Ar/O2 mixtures at O2 composition, respectively, (105.5±0.3) ppm for ZrC-A, (119±2) ppm for ZrC-B and (130.7±0.5) ppm for ZrC-C.

Diamond films have been achieved for CH4 concentrations ranging between 0.5 and 3%, and nitrogen amounts introduced in the feed gas between 0 and 3000 ppm, for an averaged power density of 15 W cm−3.

This FID has a stated accuracy of better than ± 0.2 ppm, with linearity better than ± 0.05 ppm for an analyte range of 0-100,000 ppm hydrocarbon, so was therefore well suited for this study as the measured CH4 concentrations ranged between 100-520 ppm [18].

One announced that for the first time in our recorded history, global levels of carbon dioxide in the atmosphere averaged more than 400 parts per million (ppm) for an entire month--in March 2015 (The highest EVER recorded).