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Our research focused on 5.0, 2.5, and 0.9 GHz ISM bands.

The first part of our experiment was conducted in a 103-gallon weathertight trunk container filled with sand, mostly composed of silica in the form of quartz, with no clay.

World Health Organization estimates that one in eight person die from air pollution.

The main objective of our study is to analyze the feasibility of genetically engineered plants to remove polluting volatile compounds from air.

We measured the RF signal path loss through the sand for the above frequencies at different horizontal distances between the transmitter and receiver.

Poster #: 3 Campus: CSU Long Beach Poster Category: Agriculture/Biofuels/Environment Keywords: Arabidopsis, Senescence, Epigenetics Project Title: A TIR-NBS-LRR Class Disease Resistance Protein Mays be a Positive Regulator of Developmental Senescence in Arabidopsis thaliana Author List: Mendoza, Victor ; Undergraduate, Chemistry & Biochemistry, California State University, Long Beach, Presenting Author Brusslan, Judy; Biological Sciences, California State University, Long Beach Abstract: Leaf senescence is the final stage in leaf development in which the leaf reallocates its nutrients to growing parts of the plant.

We normalized the obtained path loss measurements as a function of distance for all frequencies to remove any offset difference due to factors such as antennas.

Our results indicate that at 0.9 GHz the received signal power level decays with distance by about 1.6 d B/cm when traveling in soil.

We also found that at higher frequencies, the RF signal experiences 4-6 d B more attenuation in soil than air.

The exact value depends on the frequency and antenna polarization type.

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