Thiobacillus Ferrooxidanns As Battery Metals are one of the most commonly used natural resources by humans. The use of metals is very broad, from jewelry to batteries. Increasing population and the use of electronic devices will make metal demand even higher. Unfortunately, this is not supported by the availability of metal resources, which are expected…
Manufacture of Lignin Sensitized Solar Cells from Wood Waste Building Materials A dye-sensitized solar cell (DSSC, DSC, DYSC or Grätzel cell) is a low-cost solar cell that belongs to the group of solar cell thin films. It is based on a semiconductor formed between a photo-sensitized anode and electrolyte, a photoelectrochemical system. The modern version…
Preface Dengue fever cases (DHF) in Indonesia in recent years become a nation problem because from year to year has increased the number. At the end of January, the Director General of Disease Control and Environmental Health of the Ministry of Health (MoH) stated there were 107 districts reporting DHF attacks with 1,669 cases. Recorded…
Water is the source of human life, animals, and plants. In human life, water is used in all areas of life. In household activities, water is used for drinking, washing, bathing and latrines. Someone in developed countries ordains 250 liters of water every day, while in developing or poor countries, the water requirement per day…
Feeding fish is one of the important things in the cultivation of fish. Unfortunately at this time the fish feeding system is generally still very dependent on human resources for its giving is still manual. Simple feeder by hand spread fish feed directly into the pool / fishpond. The use of the system has several…
Increase in the number of motor vehicles continue to increase, it is influential and can causing an increase in the level of accidents in the streets. Travel on a motorcycle is a job that demands a physical condition prhyme and strong. Preparation before driving and concentration during the journey it’s a very important thing. Before…
Basically, the catfish farmers in the country still use the traditional way in the cultivation of this mustachioed fish. So that the yield is not maximal. But along with the birth of new innovations are now modern catfish cultivation gives better yields to multiply. This makes some catfish farmers change the catfish cultivation of the…
The rise of motor robber that have lately made the concern of Linus Nara Pradhana students from SMAN 16 Surabaya to create something that could be useful for the safety of motorists from the threat of robber, the anti-robber helmet, this helmet is equipped with a tool capable of turning off the engine from a…