Burahol (Stelechocarpus burahol (Blume) Hook & Thomson) is one of fruit tree that originally was founded in Indonesia. Traditionally burahol is used as natural deodorance, but due to low economic value, the cultivation program of this plant species is almost abandoned. Regarding to this situation, currently this plant species could be categorized as one of endangered species. At present, economic value of this fruit is almost neglected and this is the main reason why not many people interested to cultivate this plant. In order to change the people opinion on this plant and to improve it economic value, study on the chemical content of this plant had been carried out. From the research work, it was founded that burahol fruit have a significant content of anti-oxidative compound. From the anti-oxidative analysis using DPPH (1,1-diphinil pycril hidrazil) method, the lowest IC 50 was showed by n-buthanol extract of flower (22.44 ppm) and ethyl acetate extract of fruit (29.12 ppm). Flower part also showed low IC 50 of ethyl acetate extract (35.07 ppm). Further purification through fractionation process of the plant extract was surprisingly followed by the decrease of anti-oxidative activity.

Relentless development of technology triggers the smartphone production. The increasing number of smartphone use is followed by escalation of its waste, where its battery is usually left unrecycled. The analysis of the battery content shows that it is consist of a considerable amount of cobalt that can be reutilized based on its relatively high economic value, which valued USD 61/kg. Leaching as a form of hydrometallurgy was used in this research to recover cobalt using HNO3 as leaching agent and H2O2 as reducing agent. Process optimization was done by varying concentration of nitric acid and reaction temperature. The result showed that the optimum leaching condition was earned in 30 minutes of leaching reaction using 3.0 M HNO3 at the reaction temperature of 90°C, resulting 98.01% of cobalt leaching efficiency. Reaction kinetics study was also done in this research and the result demonstrates that recovery of cobalt from spent lithium-ion battery by nitric acid leaching was controlled by diffusion through product layer with activation energy value of 44.67 kJ/mol.

—Salah satu langkah pencegahan penyebaran virus COVID-19 dapat dilakukan dengan cara melakukan karantina terhadap kelompok orang berisiko diantaranya ODP (Orang Dalam Pemantauan) selama 14 hari dan surveilans/pemantauan kondisi kesehatan ODP tersebut selama masa karantina sebagaimana panduan yang diterbitkan Kementrian Kesehatan Indonesia berupa Kartu Kewaspadaan Kesehatan Pedoman dan Pencegahan Pengendalian COVID-19. Upaya karantina/isolasi mandiri dilakukan sebagai metoda untuk membatasi seseorang atau sekelompok orang dalam suatu wilayah yang diduga terinfeksi penyakit dan/atau terkontaminasi. Namun pemantauan terhadap kepatuhan pelaksanaan isolasi mandiri sulit dilakukan karena puskesmas sebagai unit fasilitas kesehatan yang ditugaskan untuk melakukan pemantauan tidak memiliki alat pantau yang dapat menjamin kepatuhan ODP selama masa isolasi. PERISAI merupakan sistem informasi yang bertujuan untuk mendukung pemantauan ODP yang dapat dilaksanakan secara merata diseluruh daerah terutama bagi penduduk yang baru tiba setelah melakukan perjalanan dari daerah yang memiliki riwayat transmisi lokal COVID-19 dengan konsep digitisasi Kartu Kewaspadaan Kesehatan. PERISAI dikembangkan terbatas pada pengelolaan informasi ODP yang dapat digunakan oleh puskesmas dibawah naungan dinas kesehatan di lingkungan Kabupaten/Kota. Dengan demikian, petugas puskesmas dapat memonitoring proses isolasi mandiri yang dilakukan oleh ODP melalui aplikasi web dan ODP juga dapat melaporkan kondisi kesehatannya secara berkala melalui aplikasi mobile. Sistem informasi PERISAI dikembangkan menggunakan model pengembangan protoyping yang menghasilkan beberapa modul sistem yaitu web aplikasi, mobile aplikasi serta REST API sebagai alat komunikasi sistem

This research had purpose to determined the effect of NPL, CAR and LDR on Profitability in banking sector company listing in Indonesia Stock Exchange in years 2013-2017. The population of this research is banking sector company listing in Indonesia Stock Exchange over the period 2013-2017. Techniques used in the sample is Purposive Sampling, so obtained sample of 27 companies. The hypothesis results simultaneously shows NPL, CAR and LDR affect the Profitability in banking sector company listing in Indonesia Stock Exchange in years 2013-2017. The hypothesis results partially shows NPL negative affect and significant the Profitability in banking sector company listing in Indonesia Stock Exchange in years 2013-2017, CAR and LDR positive affect and significant the Profitability in banking sector company listing in Indonesia Stock Exchange in years 2013-2017.Keywords : NPL, CAR, LDR, Profitability, Banking Sector Company

Lithium ion batteries are commonly used as power sources for mobile phone, but by using it continually will degrade their capabilities. Battery replacements will cause a lot of waste in environment. Spent lithium ion batteries cathode contain heavy metals, such as cobalt and nickel. However it is also included as valuable metals thus recovery process is necessary. In this research, hydrometallurgical leaching process has been done for recovery of cobalt and nickel from spent lithium ion batteries using citric acid as a leaching agent by varying citric acid concentration (0.5-1 M), reaction temperature (50-80) and reaction time (5-20 minutes). The spent lithium ion batteries were analyzed by atomic absorption spectroscopy (AAS). The result showed that the leaching of lithium ion batteries using citric acid was depend on citric acid concentration, reaction temperature and reaction time. Based on kinetics study, the leaching reaction of cobalt and nickel from cathode powder using citric acid was chemically controlled process and the activation energy of cobalt and nickel were 67.12 kJ/mole and 58.22 kJ/mole. The reaction order of leaching cobalt and nickel using citric acid was first-order reaction.