dB to +3dB, if you are using Peak Program Meters (PPMs).
The second scenario the RCP 4.5 stands for Representative Concentration Pathway (RCP) and is a scenario of long-term, global emissions of greenhouse gases, short-lived species, and land-use-land-cover which stabilizes radiative forcing at 4.5 Watts per meter squared (W/m2), approximately 650 ppm CO2 equivalent) in the year 2100 without ever exceeding that value.
Abbreviations: interquartile range (IQR), hour (h), parts per billion (ppb), micrograms per cubic meter (μg/m), parts per million (ppm).
Abbreviations: interquartile range (IQR), rate ratio (RR), confidence interval (CI), hour (h), parts per billion (ppb), micrograms per cubic meter (μg/m), parts per million (ppm).
The level of toxic carbon monoxide (CO) is measured in parts per million (ppm) by a CO meter in addition to self-reporting smoking status.
Your water has to read less than 50 parts per million (ppm) on the TDS meter in order for it to be safe for your plant.
The determination of fluoride level was performed potentiometrically using a combined fluoride selective electrode ELIT 8221 (Nico, USA) with a detection limit of 0.02 ppm of fluoride per pH meter InoLab pH/ION 735P (WTW, Germany) whilst stirring continuously in an electromagnetic stirrer.
At the end of each trial, the carbon dioxide (CO2) concentration in the two arms of the Y-olfactometer was quantified using a 435-4 Testo multi-functional meter equipped with an indoor air quality probe [range: 0 to +10000 ppm CO2, accuracy: ±50 ppm CO2±2% of mv, 0 to +5000 ppm CO2] and an axillary measure of volunteer temperature was assessed.
For the determination of CO2, sample air was pulled through a drying column to remove H2O, a mass flow meter, and then the CO2 analyzer that has a range of 0-2000 ppm CO2 with a resolution of better than 1 ppm.
The following Supporting Information is available in the online version of this article – Figure SI 1. Regression lines resulting by plotting the products of length and width of the leaves of 42-day-old plants grown at 360 or 700 ppm CO2 against their areas determined with an area meter (means of n = 3 and standard deviations).
