Gold processing by amalgamation produces gold amalgam and waste mercury. Poor mercury waste management can pollute the environment. Ilegal gold miners are often found in West Sumatra. In the process of gold processing always use Hg for the purification of the gold. This study aims to determine the level of mercury (Hg) in the gold miner's urine and see the long-working relationship. Mercury (Hg) is a heavy metal grouped into groups having high toxicity levels. The use of mercury (Hg) in the gold processing process can cause negative impact. Determination of mercury (Hg) with Atomic Absorption Spectrophotometer (SSA) method. The population of this research is gold miner worker in Nagari Koto Tuo Sijunjung as many as 3 people and also as sample. The instrument used in this research is a questionnaire and testing of urine specimen dilaboratorium with wet destruction method in research in.i Factors studied are the characteristics of r0espondents including age, and length of work. Sampling was done as much as 20 ml of urine. Urine sample examination was done at Laboratory by using Wet Destruction method. The result of mercury (Hg) examination in gold miner's urine was obtained by an average of 15.8 μg / l Mercury (Hg) in urine with a threshold of 4 μg / l. The benefit of this research is to provide an overview of the level of toxicity that occurs due to gold mining in illegal gold miners in Nagari Koto Tuo Sijunjung, West Sumatra.
The increasing number of population each year makes the number of building needs for houses, buildings, schools, offices and other infrastructure will increase. In general, building consumption cannot be separated from the use of bricks as a form of wall construction in building construction. The size and compressive strength of bricks circulating in the market are of poor quality which comes from fabrication, local work or home industries. In the brick-making process, bricklayers only use certain types of soil to maintain the quality of brick production. As a result, the availability of soil as the main material in brick making will decrease. Another alternative to meet the shortcomings of the brick-forming material and make it stronger and more durable, can be used as a substitute for other materials such as waste paper. The use of paper waste is an effort to find new types of building materials and to reduce environmental pollution problems due to paper waste. This study aims to analyze the concentration of the addition of paper waste ash on the strength of the bricks. The benefit of this research is as an alternative study of meeting the needs of brick raw materials for environmentally friendly buildings by utilizing paper waste ash. The results showed the effect of a mixture of paper waste ash as a clay additive on the compressive strength of normal bricks (fc '2.9 MPa). The percentage value of compressive strength with a mixture of paper waste ash 3% obtained an average compressive strength of 40.10 kg / cm2, 5% mixture variation obtained an average compressive strength of 61.48 kg / cm2 and 7% mixture variation obtained an average compressive strength average 64.12 kg / cm2 against the compressive strength of normal bricks 37.28 kg / cm2. The conclusion of this research is that the variation of the mixture of paper waste ash with a variation of 7% paper waste ash mixture exceeding 60 kg / cm² (compressive strength class III) SNI 15-2094-2000a. This shows that paper waste ash can increase the compressive strength of bricks.
Modern medicines that are developing now come from active ingredients isolated from plants that require large amounts of plants. The development of new drugs from endophytic fungi found obstacles in the amount of pure compounds produced. Therefore further research is needed by using endophytic fungi as a new antimicrobial producer. This study aims to see the ability or activity of pure compounds produced by Sporothrix sp endophytic fungi from Dahlia tuber (Dahlia variabilis). Test the activity of pure compounds produced by Sporothrix sp. Endophytic fungi on E. coli and Staphylococcus aureus determined by disc diffusion method. With doses of 10, 30 and 50μg/disk. In Escherichia coli bacteria doses 10 and 50μg/disk gave significant inhibition of pure compounds from isolation compared to the positive control of ciprofloxacin, which was marked by a statistically significant test result (p <0.05). In contrast to Staphylococcus aureus there was no significant difference in doses of both doses of 10.30 and 50μg/disk. Determination of pure compounds was carried out by HPLC and Infra Red Spectrophotometry.
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