Judul: Study of Led Light Intensity on the Growth of Kangkung Darat (Ipomea reptans poir)
Abstrak: Budidaya tanaman dalam ruangan dapat digunakan sebagai alternatif keterbatasan lahan pertanian. Hal ini dapat dilakukan dengan mengganti cahaya matahari dengan lampu. Penelitian ini dilakukan untuk mengetahui lampu seperti apa yang mendekati karakteristik cahaya matahari sehingga tanaman dapat tumbuh dengan baik. Kangkung digunakan sebagai tanaman percobaan karena kangkung merupakan tanaman yang mudah beradaptasi. Perlakuan cahaya yang berbeda menggunakan led penumbuh tanaman dan led putih dengan variasi arus led memancarkan intensitas cahaya yang berbeda. Tanaman dengan led putih mengahasilkan tanaman yang cukup cepat pertumbuhannya dengan hasil bisa sampai melebihi tanaman dengan cahaya matahari langsung. Tanaman dengan led penumbuh tanaman berwarna ungu menghasilkan tanaman yang lebih hijau., Indoor plant cultivation can be used as an alternative to limited agricultural land. This can be done by replacing sunlight with lamps. This research was conducted to determine what kind of lamp is close to the characteristics of sunlight so that plants can grow well. Kale is used as an experimental plant because kale is a plant that is easy to adapt. Different light treatments use plant grower leds and white leds with a variety of led currents emitting different light intensities. Plants with white LEDs produce fairly fast growing plants with yields that can exceed plants in direct sunlight. Plants with purple plant grower leds produce greener plants.
Keyword: Light Intensity, Kale, Plant Grower Led

Judul: The Effect of LED Grow Lights on Asoka (Ixora coccinea L.) Plant Growth
Abstrak: Tanaman merupakan komponen yang menambah keindahan suatu lanskap apabila dapat tumbuh dengan baik. Tanaman Soka (Ixora coccinea L.) merupakan salah satu tanaman yang memiliki beragam fungsi pada lanskap. Tanaman ini merupakan tanaman yang membutuhkan cahaya matahari langsung. Saat ini, banyak lahan terbuka yang telah banyak dibangun seperti perumahan, perkantoran, dan sebagainya. Peralihan fungsi ini mengakibatkan semakin menyempitnya ruang terbuka. Banyak orang beralih dengan melakukan penanaman di dalam ruangan. Metode penanaman ini perlu memperhatikan lingkungan tumbuh tanaman tersebut agar tanaman tumbuh dengan baik. Adanya pembangunan secara vertikal juga mengakibatkan terhalangnya sinar matahari yang masuk ke dalam taman, perlu adanya solusi untuk hal tersebut, yakni penggunaan lampu LED grow light sebagai pengganti cahaya matahari. Penelitian ini bertujuan untuk menganalisis efektivitas penggunaan lampu LED grow light terhadap pertumbuhan tanaman Soka, mengetahui intensitas lampu yang efektif untuk pertumbuhan tanaman Soka, dan memberikan rekomendasi intensitas lampu yang optimal untuk pertumbuhan tanaman Soka di dalam ruangan. Pada penelitian ini dilakukan pengukuran pertumbuhan tanaman Soka dalam ruangan dengan menggunakan Rancangan Acak Lengkap (RAL). Penelitian ini menggunakan 1 faktor perlakuan dengan tiga taraf intensitas cahaya lampu LED grow light yakni 100% (4287 lux) setara dengan intensitas matahari penuh, 50% (2587 lux), serta tanpa tambahan lampu LED grow light (20 lux). Dalam penelitian dilakukan pengukuran pertumbuhan yang berupa tinggi tanaman, jumlah daun, dan lebar daun selama 8 minggu pengamatan. Pada setiap taraf perlakuan digunakan masing-masing 6 ulangan. Dari penelitian ini diperoleh bahwa pertumbuhan tanaman dengan pemberian intensitas 100% memiliki hasil yang sangat nyata lebih tinggi pada setiap variabel pengukuran pertumbuhan yang diambil dibandingkan dengan taraf 50% dan tanpa tambahan cahaya LED grow light. Hasil variable pertumbuhan tanaman pada taraf 50% juga memberikan nilai yang nyata lebih tinggi dibanding dengan tanaman tanpa tambahan cahaya LED grow light., Plants are a component that adds to the aesthetics of the landscape if its growth needs are met properly. Asoka (Ixora coccinea L.) plant is one of the plants that has various functions in the landscape. This plant is a plant that needs direct light. Many open spaces have been built into other things such as housing, offices, and so on. This transfer of function also results in less green open space. Nowadays many people use indoor planting. This planting method needs more attention to the growing environment of the plant so that the plant grows well. Vertical construction is also a problem because it can block lighting from a garden. So there needs to be a solution, namely the use of LED lights to replace lighting. This research aims to analyze the effectiveness of using LED grow lights on the growth of Asoka plants indoors, determine the effective light intensity for growing Asoka plants indoors, and provide recommendations for optimal light intensity for growing Asoka plants indoors. This research was carried out using the Completely Randomized Design (CRD) method. This study used three levels of light intensity of LED grow light, namely 100% (4287 lux), 50%, and without additional LED grow light (20 lux). In the research, growth measurements were carried out in the form of plant height, number of leaves and leaf width
Keyword: Growth, LED Grow Light, Light Intensity, Asoka Plant

Judul: Pemurnian dan karakterisasi protein inhibitor RNA helikase virus hepatitis C
Abstrak: Hepatitis C virus (HCV) infection is the second most common chronic viral infection in the world with global prevalence. This infection is contribution to chronic hepatitis and liver cirrhosis, often leading to hepatocellular carcinoma. There is no effective drug and vaccine available against HCV. The current standard treatment, a combination of pegylated interferon-α with ribavirin, is limited by its suboptimal response rate in a significant patient population, side effects, and affordability. Therefore, development of effective drug is needed. One approach to find out the candidate of antiviral drug is to discover the inhibitor of enzyme that essential for virus replication, such as RNA helicase. Streptomyces chartreusis 5-095 produce the inhibitor of HCV RNA helicase. The aim of this study was to purify the protein inhibitor which has inhibition activity against ATPase activity of RNA helicase HCV from S. chartreusis 5-095. The supernatant of culture S. chartreusis 5-095 exhibited high inhibiton activity against ATPase activity of RNA helicase HCV (approximately 72%) at 10 days of incubation. The extracellular protein inhibitor was partially purified by procedures of precipitation with ammonium sulfate to 65% saturation and gel filtration (Sephadex G50) using methanol water solution (4:6) as an eluen. The purity of protein inhibitor was monitored by SDS PAGE. The protein inhibitor showed a relative molecular mass were estimated to be 14 kDa and increased the purity 23,08 fold than those of the crude protein. The specific activity and IC50 after purification were 13,1338 U/mg and 0,0767 mg/mL, respectively. The activity of purified protein inhibitor showed its stability over pH range from 5-8 and optimum at pH 7,4. The inhibition activity showed its stability up to 70% at temperature 100 oC. The purified protein inhibitor relatively stable its activity at storage in the range of -20 oC to room temperature for 35 days.
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