Centella asiatica collectively known as centelloids. These terpenoids include asiaticoside, centelloside, madecassoside, brahmoside, brahminoside, thankuniside, sceffoleoside, centellose, asiatic brahmic-, centellic-and madecassic acids. Preparations of alternative medicine due to the wide spectrum of pharmacological activities associated with these secondary metabolites asiatica. In this present study, solvent. Determination of the asiaticoside content Performance Liquid Chromatography (HPLC), Thin Layer Chromatography (TLC), Transform Infra Red (FTIR). Samples of plantation areas, Bogor, Lembang and Solo. Asiaticoside content in the m Bogor, Lembang, and Solo samples were 2.82%; 2.68%; and 2.8% respectively. Asiaticoside in ethanolic extract from Bogor, Lembang, and Solo samples were 2.79%; 2.75%; and 2.91% respectively. Two way ANOVA study showed that there types of solvent used in extraction and the asiaticoside content in the obtained extract, significant difference between varied plantation area and obtained asiaticoside content, and significant difference between interactions of different solvent with different plantation area.

Setiap tahun sekolah menengah pertama menerima calon peserta didik baru dengan angka cukup banyak. Kesulitan yang sering terjadi yaitu pengambilan dan penyerahan formulir, karena harus mengantri selain itu melihat pengumuman hasil seleksi, orang tua calon peserta didik baru harus datang ke sekolah. Sistem ini untuk mempermudah panitia penerima calon peserta didik baru menentukan calon peserta didik baru yang akan diterima sesuai dengan kuota yang diseleksi berdasarkan peringkat serta menghilangkan antrean pada saat pengambilan formulir dan penyerahan formulir pada saat orang tua calon peserta didik baru mendaftar dan mempermudah melihat pengumuman tanpa harus datang ke sekolah. Metode Simple Additive Wighting (SAW) merupakan solusi untuk menghitung berdasarkan kriteria yang telah di tentukan oleh masing-masing sekolah. Penerapan SAW menghasilkan output terima atau tidak diterima dengan rincian kriteria penilaian akademik dan non akademik. Sistem ini menentukan calon peserta didik baru yang akan diterima sesuai dengan kuota yang diseleksi berdasarkan peringkat dan tidak ada lagi antrean dalam pengambilan dan menyerahkan formulir serta melihat pengumuman dapat dilihat melalui aplikasi android.

Kajian ini merangkum teknologi dan inovasi sistem pengendalian yang berpotensi diterapkan dalam intensifikasi proses hidrolisis selulosa pada produksi bioetanol G2. Telaah dimulai dari perkembangan terbaru intensifikasi produksi bioetanol secara umum. Hidrolisis selulosa adalah tahapan pembeda antara proses bioetanol G2 dan generasi sebelumnya. Perhatian utama dalam intensifikasi hidrolisis selulosa adalah pada bagaimana hidrolisis selulosa terintegrasi dengan sistem pengendalinya dan integrasi hidrolisis selulosa dengan bagian hulu (pretreatment) dan hilir (penyulingan). Keunikan proses ini adalah durasi kerja yang membutuhkan 48 jam dan viskositas campuran yang tergantung waktu. Bagian akhir telaah ini memetakan potensi penerapan teknologi dan inovasi terbaru yang telah dirangkum. Pemetaan berdasarkan potensi peningkatan efisiensi dan potensi tambahan investasi. Sakarifikasi Very High Gravity (VHG) pada kecepatan pengadukan optimum dan intermitten dinilai sebagai pilihan paling menarik bila intensifikasi dilakukan pada unit produksi yang telah berdiri. Namun jika intensifikasi untuk rancangan pabrik baru, maka tangki hidrolisis yang dirancang dengan simulasi CFD, dilengkapi dengan sekat (baffles) yang bergerak terkendali, dan rancangan batang pengaduk (impeller) paling cocok menurut simulasi adalah pilihan menarik. Rancangan ini kemudian diintegrasikan dengan sistem pengendali yang mampu memperkirakan perubahan viskositas. Review on Potency of Application Recent Technology in the Integrated Process and Control on Cellulose Hydrolysis in Bioethanol G2 Production ProcessAbstractThis review listed current technologies and innovations in the control system which potentially applied in the intensification of cellulose hydrolysis as part of 2nd Generation Bioethanol production process. The review started from the general latest innovations in the 2nd Generation Bioethanol. Cellulose hydrolysis as the main characteristics in the 2nd Generation of Bioethanol required further attention in the intensification. Especially in how to integrate cellulose hydrolysis with its control system and to integrate it with upstream and downstream units. The special requirements in cellulose hydrolysis are 48 hours agitation duration and time-dependent mixture viscosity. At the end of the review, listed technologies were assessed to be applied in the 2nd Generation Bioethanol. The assessment was based on their potency in increasing process efficiency and the potency of required investment if they are applied. A Very High Gravity (VHG) saccharification at optimum intermittent agitation speed was a promising innovation for cellulose hydrolysis if intensification was conducted onto the existing production plant. If intensification is conducted to a plant design, building an agitation tank according to best Computational Fluid Dynamic (CFD) simulation, complemented with controlled moving baffles and best suitable impeller design is a promising design for efficient hydrolysis. This agitation tank was then completed with the advanced available control system, which is capable to adapt the viscosity changes.

The present study investigates the aqueous stability of polyethylene glycol and oleic acid-based anionic surfactants through the dynamic light scattering (DLS) and zeta potential methods, for application in enhanced oil recovery (EOR). Polyethylene glycol dioleate sulfonate (PDOS) surfactant solutions were prepared in concentrations of 0.05, 0.1, 0.3, 0.5, and 1 wt% in deionized water. Aqueous stability of PDOS was assessed by measuring the droplet size over five days, using nano particle analyzer HORIBA SZ-100 at 25 o C. Results show that good aqueous stability of PDOS was achieved at concentrations of 0.1 to 1 wt%, but with the droplet size becoming unstable at the lowest concentration of 0.05 wt%. The polydispersity indices were classified into polydisperse distribution type recorded as 0.3 to 0.5 at concentrations of 0.05 and 0.1 wt% and 0.2 at concentrations of 0.3 to 1 wt%. The critical micelle concentration (CMC) of PDOS was 0.3% and the interfacial tension of PDOS surfactant above the CMC was around 10-3 dyn/cm. The zeta potential of PDOS surfactant without the addition of salt in concentrations of 0.05, 0.1, 0.3, 0.5, and 1 wt% was highly stable up to-96.8,-90.5,-89.6,-82.3, and-64.4 mV, respectively. With the addition of salt they were moderately stable at a concentration of 1 wt%. The conductivity increased with increasing concentration. The zeta potential of PDOS with the addition of salt was moderately stable in a concentration of 1%. Although PDOS with concentration of 0.05% showed a high value of zeta potential with the addition of salt, there is no guarantee that the PDOS surfactant solution will be stable for five days.

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