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Sintesis Dan Karakterisasi Natrium Silikat (Na2SiO3) Dari Sekam Padi Trivana, Linda; Sugiarti, Sri; Rohaeti, Eti
Jurnal Sains Dan Teknologi Lingkungan Vol 7, No 2 (2015): SAINS & TEKNOLOGI LINGKUNGAN
Publisher : Teknik Lingkungan Universitas Islam Indonesia

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Abstract

Abu sekam padi umumnya mengandung silika (SiO2) sebesar 86,90-97,30% dan sejumlah kecil alkali dan logampengotor. Kandungan silika yang tinggi pada abu sekam padi dapat digunakan sebagai alternatif sumber silika yangpotensial dalam sintesis natrium silikat. Natrium silikat murni disintesis melalui dua tahap, yaitu isolasi silika darisekam padi dan sintesis natrium silikat. Isolasi silika terdiri atas proses pengarangan, pengabuan arang sekam padasuhu 600°C, selama 2 jam dan pemurnian silika dengan HCl 3%. Natrium silikat disintesis dengan cara destruksidengan NaOH yang diikuti dengan peleburan. Natrium silikat yang diperoleh akan dikarakterisasi dengan teknik FTIRuntuk analisis gugus fungsional dan EDS untuk analisis komposisi serta kadar unsur yang terkandung dalam sampel.Analisa FTIR sampel natrium silikat membuktikan terjadinya pembentukan SiO2. Pola serapan silika yang munculumumnya adalah gugus silanol (≡Si-OH) dan siloksan (≡Si-O-Si≡). Pita serapan di 2800-3750 cm-1 menunjukkangugus –OH silanol dan H2O yang diserap. Bilangan gelombang 682,8 cm-1 menunjukkan ikatan Si-O-Si dan vibrasiulur Si-O pada silanol (≡Si-OH) pada bilangan gelombang 972,12 cm-1. Hasil EDS menunjukkan bahwa unsur-unsuryang terdapat dalam natrium silikat sintetis, yaitu oksigen 71,89%, natrium 22,63%, dan silikon 5,39%.Kata Kunci : sekam padi, silikat, natrium silika, FTIR, EDX
Hubungan Curah Hujan dan Hari Hujan Terhadap Produksi Kelapa (Cocos nucifera) Dalam Mapanget (DMT) Pada Beberapa Sistem Jarak Tanam di KP. Mapanget Balit Palma: Hubungan Curah Hujan dan Hari Hujan Terhadap Produksi Kelapa (Cocos nucifera) Dalam Mapanget (DMT) Pada Beberapa Sistem Jarak Tanam di KP. Mapanget Balit Palma Nur, Muhammad; Manambangtua, Alfred Pahala; Trivana, Linda; Gosal, Lidyana Maya; Pasang, Patrik Markopala
Jurnal Penelitian Pertanian Terapan Vol 24 No 1 (2024)
Publisher : Politeknik Negeri Lampung.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/jppt.v24i1.3010

Abstract

Most of the coconut plantations in Indonesia are dry land, so it is very dependent on rain to meet the water needs of the coconut plants. Changes in rainfall and rainy days affect coconut production. This research was conducted to determine the effect of rainy days and rainfall and its correlation to the production of three varieties of Coconut Tall. The research was conducted at the Mapanget Experimental Garden, IPCRI from January 2019 to April 2019, using data on Coconut Tall Mapanget  Inner Coconut production, rainy day data (days) and rainfall (mm) for the period 2014 - 2020 The analytical method used is multiple linear regression and correlation analysis. The results of multiple regression analysis showed that rainy days and rainfall variables had no significant effect at the 5% test level on the increase in the number of bunches/trees/year, the number of fruits/bunch, and the number of fruits/tree/year in the variety Coconut Tall Mapanget. The results of the regression analysis showed that rainfall and rainy days had no significant effect on the coconut production variables, namely the number of bunches/tree/year, number of fruit/bunch, number of fruit/tree/bunch in KP. Mapanget on plants with a spacing of 9 x 9 m, 5 x 16 m, 5 x 3 x 16 m and 5 x 12 m. The various spacing treatments did not have a significant or significant effect on the coconut production component in coconut tall Mapanget (DMT) but in general, the 9 x 9 m spacing was relatively better than the other spacing treatments.  
Physicochemical and Rheology Properties of Ice Cream Prepared from Sunflower Oil and Virgin Coconut Oil Trivana, Linda; Suyatma, Nugraha Edhi; Huunaefi, Dase; Munarso, S. Joni; Pradhana, Adhitya Yudha; Rindengan, Barlina
International Coconut Community Journal Vol 39 (2023): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v39i.452

Abstract

In the last decade, increasing trends towards the consumption of healthier foods have forced processors of high-fat products (ice cream) to shift their formulations to higher proportions of unsaturated or “healthier” fats. Vegetable oils such as sunflower oil and VCO can be used as a substitute for milk fat, milk solids not fat (skim milk powder), sweeteners, stabilizers and emulsifiers, and mineral water in making ice cream. A study was carried out to determine the effects of the use of the ratio of sunflower oil: virgin coconut oil with palm fruit as a stabilizer in the production of ice cream on physicochemical properties (pH, proximate, overrun, viscosity, and melting rate). The use of palm fruit is based on the content of galactomannan in palm fruit. Premium ice cream with five different ratios of SO and VCO (15:0), (10:5), (7.5:7.5), (5:10), (15:0). The ice cream production involves mixing, pasteurization, homogenization, aging, and freezing. The physicochemical result shows ice cream sample with a ratio SO:VCO (5:10) obtained good physical properties, the lowest first-time drop/ shape retention, and a low melting rate compared to the others. The rheological behavior of ice cream is the non-Newtonian fluids with a pseudoplastic behavior. The apparent viscosity decreased with increasing shear rate.