Water is the main source for life and also the most severe substance caused by pollution. The mandatory parameters for determining microbiological quality of drinking water are total non-fecal Coliform bacteria and Coliform fecal (Escherichia coli). Coliform bacteria are a group of microorganisms commonly used as indicators, where these bacteria can be a signal to determine whether a water source has been contaminated by bacteria or not, while fecal Coliform bacteria are indicator bacteria polluting pathogenic bacteria originating from human feces and warm-blooded animals (mammals) . The water inspection method in this study uses the MPN (Most Probable Number) method which consists of 3 tests, namely, the presumption test, the affirmation test, and the reinforcement test. The results showed that of 15 drinking water samples 8 samples were tested positive for Coliform bacteria with the highest total bacterial value of sample number 1, 15 (210/100 ml), while 7 other samples were negative. From 8 positive Coliform samples only 1 sample was stated to be negative fecal Coliform bacteria and 7 other samples were positive for Coliform fecal bacteria with the highest total bacterial value of sample number 1 (210/100 ml).
Banjir merupakan salah satu bencana alam di mana air yang berlebihan tidak mampu dialirkan ke sungai maupun saluran saluran yang ada (drainase). Kecamatan Matangkuli merupakan salah satu daerah terdampak banjir dari Krueng Keureuto. Hampir setiap tahun terjadi banjir yang merugikan aspek sosial ekonomi masyarakat. Oleh karena itusebagai studi awal terlebih dahulu perlu dilakukanperlu dilakukan analisa dampak banjir terhadap kawasan Matangkuli di sepanjang sungai Keureuto. Curah hujan rencana dianalisis dengan periode ulang 20, 50 dan 100 tahun. Analisis hidrograf banjir menggunakan persamaan Nakayasu. Untuk melakukan simulasi aliran sungai menggunakan software HEC-RAS Mapper. Hasil yang diperoleh pada lokasi tinjauan, sungai tidak dapat menampung debit banjir rencana. Selain itu, diprediksi genangan banjir sedalam 1-2 meter dengan klasifikasi bahaya banjir menengah hingga berat.
This Study attempts to identify the types of macroscopic fungi found in Langsa City Protected Forest area. The research area is ± 10 Ha. Exploration of high level mushroom species using the roaming observation method, namely making direct observations to the research location. Data analysis was carried out descriptively. The results of this study were found as many as 22 spesies of macroscopic fungi. Fungi that are found are abundant in soil and tree litter or rotten wood. The result of this study are expected to provide preliminary information about the diversity oh high level fungi that can grow in protected forest area in Langsa City.
Antibiotics are drugs that are used to inhibit bacteria production. The long-term use of antibiotics can cause resistance problems. As a consequent it is necessary to find the alternative antibiotics that are derived from plants. The alternative antibiotics are considered safer, relatively cheap and easy to obtain. One of the herbal plants used is Baccaurea macrocarpa. The objective of this study was to identify the secondary metabolites of B.macrocarpa, the effect of methanol extract from B.macrocarpa leaves on the growth of Escherichia coli and Salmonella typhi bacteria and to measure the optimal concentration of the sample to inhibit the growth of E.coli and S.typhi bacteria. The research has been conducted for 3 months at the Universitas Samudra laboratory. The method used was the well method with E.coli and S.typhi bacteria test. Each treatment of the methanol extract of B. macrocarpa leaves with a concentration of 20%, 30% and 40% (g/mL). Positive control was ciprofloxacin and negative control was sterile distilled water. The results obtained the concentration of 40% (g/mL) as the optimal concentration to inhibit the growth of E. coli and S.typhi bacteria with the resulting inhibition zone of 6.3 mm and 5 mm. The results of the study concluded that the B. Macrocarpa leaf extract could be developed as a basic ingredient for antibiotics.
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