Design of monitoring ph pool water of catfish breeding using GSM 900A module on arduino. The purpose of this research is to design a monitoring system to support catfish breeders in knowing the acidic and alcali pH levels water. Arduino Nano is a programmable tool for processing water pH sensor reading data. The workings of this tool is, when the pH sensor which is an input is put in water, the…
This study aims to obtain biosurfactant producing bacteria originating from the pond mud of IPAL in the palm oil industry at PT. Sawit Asahan Indah, Ujung Batu, Rokan Hulu, Riau Province. This study uses a survey method. Mud samples are taken from the Contact pond by using a sample bottle, then inserted into the cool box, then taken to the laboratory. Furthermore, 5 grams of mud samples were we…
Island rentals in Indonesia to foreign parties violate the principles of an island nation that emphasizes the integration between land, sea and air dimensions in carrying out national development. It can also eliminate the integration of the sea dimension or waters in national development. in the National Long-Term Development Plan (RPJPN), one of the points of the long-term development mission…
ABSTRACT In the Toba Batak tribe community, especially Batak Toba students partuturan marga very important as determining the kinship system. The partuturan also serves as a bridge in the implementation of adat rules of Dalihan Na Tolu in the Toba Batak community. Partuturan marga is considered important for the Toba Batak community is who we are at Dalihan Na Tolu. Partuturan marga with cla…
Heat pipe is a heat conductor with a certain size containing a special liquid as a conductor of heat from the tip of the evaporator to the tip of the condensor, this study uses a heat pipe made of copper pipe has an outer diameter of 9.5 mm and a length of 400 mm using working acetone fluid with filling the ratio of 80% of the total evaporator volume is 1.8 ml. Previous research has examined th…