Coffee (Coffea sp) is the second-largest beverage consumed by people around the world whose process comes from the processing and extraction of coffee beans. Coffee has a chemical compound, one of which is caffeine. Caffeine is a crystal-shaped compound. Caffeine can be a tangible white powder or a shiny white needle-shaped, odorless caffeine, and caffeine has a bitter taste. The purpose of the study was to determine the caffeine levels of local ground coffee on the island of Dabo with the spectrophotometry UV-Vis method. Analysis of the ground coffee caffeine levels is quantitative determined using spectrophotometry UV-Vis. The equation of the calibration curve of caffeine is regression y = 0.1307x + 0.0112 with a correlation coefficient value (r) of 0.9993. Based on Indonesian National Standards (SNI) 01-7152-2006, The maximum limit of caffeine in foods and beverages is 150 mg/day and 50 mg/serving. The results of the analysis of caffeine levels from three samples of ground coffee circulating on Dabo Island each in 2 g were 0.3383 mg for Sample A; 0.3786 mg for Sample B; and 0.5803 mg for Sample C.

Bronok (Acaudina molpadioides) is a type of marine biota of the phylum Echinoderms class Holothuroidea that can empirically increase stamina and have positive effects on health. One of the infectious diseases such as diarrhea is caused by Escherichia coli and Staphylococcus aureus bacteria which are still a major problem in public health and have the potential to cause death. Most of these bacteria have developed resistance to antibiotics This study aims to determine the antibacterial activity of extracts of bronchus (Acaudina molpadioides) against the growth of Staphylococcus aureus and Escherichia coli bacteria. In addition, this study uses the disc diffusion method with concentrations of 25%, 50% and 75% with the sample used is bronchoconstriction extract. The results of the bland zone diameter showed that methanol extract was able to inhibit the growth of Staphylococcus aureus bacteria with an average diameter of 4.1 mm, 5.3 mm, and 5.8 mm, ethyl acetate extract which is 4.7 mm, 6.2 mm, and 15.2 mm. Methanol extract showed resistance to Escherichia coli bacteria with an average diameter of 3.7 mm, 4.5mm, and 5 mm. The results of the bronok extract study (Acaudina molpadioides) had antibacterial activity against Staphylococcus aureus bacteria in methanol and ethyl acetate extracts. Methanol extract has antibacterial activity against Escherichia coli bacteria. By looking at the inhibition zone of each solvent where the larger the inhibition zone, the stronger the antibacterial activity.

Ikan asin merupakan produksi bahan ikan segar yang ditambahkan garam sekitar 15-20%. Cara tradisional ini memiliki kekurangan seperti terkendala saat musim penghujan sehingga proses penjemuran ikan asin menjadi tidak sempurna yang mengakibatkan ikan asin cepat mengalami kerusakan, karena itu banyak pedagang ikan asin menggunakan bahan kimia berbahaya seperti formalin untuk mengawetkan ikan asin agar bertahan lama dan tidak membusuk. Penelitian ini bertujuan untuk mendeteksi adanya kandungan formalin pada ikan asin yang dijual di Pasar Jodoh, Kota Batam. Metode yang digunakan adalah analisis kualitatif. Hasil dari pengujian 18 sampel ikan asin yang diambil dari Pasar Jodoh, Kota Batam, negatif mengandung formalin.

Hipertensi merupakan faktor resiko penyakit yang sangat berbahaya. Pengobatan jangka panjang yang dilakukan untuk mengontrol tekanan darah dan kadar asam urat akan menyebabkan masalah farmakologis yang berdampak buruk kepada penderita. Berdasarkan uraian tersebut maka perlu dilakukan sosialisasi tentang cara mengendalikan hipertensi dan asam urat melalui penggunaan tanaman obat keluarga. Tujuan dari kegiatan ini yaitu untuk memberikan pengetahuan kepada ibu-ibu majelis taklim tentang pentingnya mengendalikan hipertensi dan asam urat dengan  menggunakan tanaman obat keluarga; memberikan pengetahuan tentang  jenis tanaman obat keluarga yang dapat digunakan untuk mengendalikan hipertensi dan asam urat ringan. Metode yang digunakan adalah  penyuluhan langsung artinya para petugas langsung bertatap muka dengan masyarakat. Hasil yang didapatkan menunjukkan bahwa, pengetahuan peserta mengenai jenis-jenis dan manfaat tanaman obat sanga ttinggi (90%). Pengetahuan untuk menanam, membudidayakan, dan meracik tanaman obat sebagai pencegahan penyakit Hipertensi dan asam urat ringan juga sangat tinggi (80%).

Medicinal plants are very popular among Indonesian people as ingredients for traditional medicine. One of the medicinal plants is Nyirih (Xylocarpus granatum) from the Meliaceae family which is empirically used as a diarrhea medicine and wound cleanser. This study aimed to determine the antibacterial activity of ethyl acetate and n-hexane extract of Nyirih (Xylocarpus granatum) against Pseudomonas aeruginosa, Sthapylococcus aureus bacteria and the fungus Candida albicans. The method used is the paper disc diffusion method with a concentration of Nyirih leaves at 50%, 75%, and 100%. The results of antibacterial activity of the ethyl acetate extract of Nyirih leaves against Pseudomonas aeruginosa and Sthapylococcus aureus bacteria resulted in a DDH value (diameter of the inhibition zone) 9.83 mm -21.28 mm, but for n-hexane extract did not produce a DDH value. The test results for antifungal activity of extract ethyl acetate and n-heksan of Nyirih leaves against Candida albicans did not produce a DDH value (diameter of the inhibition zone). Ethyl acetate extract of Nyirih leaves has potential as an antibacterial.