Author/Authors :
ilmiawati, auliya ipb university, ipb campus dramaga - organic chemistry division, department of chemistry, Bogor, Indonesia , pujiyati, . ipb university, ipb campus dramaga - organic chemistry division, department of chemistry, Bogor, Indonesia , hidayat, asep ministry of environmental and forestry - forest research and development centre, research, development and innovation agency - forest microbiology laboratory, Bogor, Indonesia , sugita, purwantiningsih ipb university, ipb campus dramaga - organic chemistry division, department of chemistry, Bogor, Indonesia , irfana, luthfan ipb university, ipb campus dramaga - organic chemistry division, department of chemistry, Bogor, Indonesia , arifin, budi ipb university, ipb campus dramaga - organic chemistry division, department of chemistry, Bogor, Indonesia
Abstract :
It has been reported that the lidah mertua plant (Sansevieria trifasciata) can absorb electromagnetic radiation from various electronic equipment. The current study aimed to make a film layer from polyvinyl alcohol (PVA) and a dichloromethane (DCM) fraction of S. trifasciata to reduce heat radiation from smartphones. S. trifasciata leaves were macerated using ethanol and partitioned with ethyl acetate, DCM, and n-butanol. The DCM fraction was chosen to create the film, for which PVA was also used. The blended film made from PVA and 0.02% DCM reduced heat radiation from smartphones by up to 4.4 °C starting from the first minute of use; its heat reduction remained stable until the 20th minute. Based on these results, it was determined that the active compounds in the DCM fraction are closely related to saponin-type steroids.
