Acid sulfate soils are characterized by high content of pyrite and low pH. Under an aerobic condition, pyrite does not present any risk. However, when it is exposed to direct contact with oxygen, it will be oxidized and produce sulfuric acid. Land amelioration is an effort to provide materials to the soil with the aim of improving physical, chemical and biological soil properties. Current resea…
The heart is a vital organ and the center of the circulatory system in the human body. The appearance of the four-chamber and outflow tracts of the heart is considered an identifying marker that allows detecting the presence of the fetal heart. This study refers to the view of the four-chamber of the heart, the valves and the aorta. In the detection process, there are several methods that can g…