This research aims to develop a REACT-based e-module using flip pdf professional on oxidation and reduction reactions for class X SMA/MA. This type of research is Research and Development (R&D) with a 4-D development model. Data collection instruments in the form of validation sheets and user response questionnaires. The results of the study obtained validity on the aspects of material sub…
ABSTRACT Iron metal (Fe) is one of the heavy metals polluting waters originating from industrial waste. Fe metal contamination can be overcome by adsorption method using activated charcoal as adsorbent. The activated charcoal used is made from kepok banana peels, because kepok banana peels contain lignin, cellulose, and hemicellulose as carbon forming so that kepok banana peels can be used as …
ABSTRACT As an urban area that has growth data that is always growing every year and where infrastructure in urban areas is a reference for success to balance population growth. This research uses rainfall data that has occurred for 10 years obtained from relevant service agencies and conducts a survey in the field to find out the problems that occur. already in the field. After obtaining …
Natural tourism consists object and recreational tourism which related any activities that explores the potential of natural resources and its ecosystems. One of the places which required it is Berastagi, Tanah Karo in North Sumatera. The freshness and coolness of Berastagi atmosphere attracts many tourists to visit it. One of the attraction in Berastagi is the famous Mount Sibayak which is sti…
The aim of this study is to understand the litter production of riparian plant present in the Siak riverside located in the Buatan II village, Siak: regency. This research was conducted from May to July 2009. Method used in this research is a purposive sampling method. There is 1 station, with 18 sampling sites. Riparian plants present in the study area are identified, while litter are coll…
Seven halogen substituted analogoues compounds chalcone, (E)-1-(4-chlorophenyl)-3-p-tolylprop-2-en-1-on,(E)-1-(4-chlorophenyl)-3-(4- isopropylfenil)prop-2-en-1-on, (E) -1-(3-bromophenyl)-3-p-tolylprop-2-en-1- on, (E) -1-(3-bromophenyl)-3-(4-isopropylphenyl)prop-2-en-1-on,(E)-1-(2- chlorophenyl)-3-p-tolylprop-2-en-1-on, (E)-1,3-bis(3-bromophenyl) prop-2- en-1-on, and(E) -1-(3-bromophenyl) -…
Swimming performance of catfish (Mystus nemurus) (BL = 16.1 ± 1.1 cm) was observed in swimming channel of flume tank on the different net color (blue and white). The swimming endurance has negative correlation on the swimming speed at each color. The swimming endurance decreased, when the swimming speed increased. The swimming performance of catfish is highest at control net than blue and…