14 research outputs found
Ekstraksi Daun Cocor Bebek Menggunakan Berbagai Pelarut Organik Sebagai Inhibitor Korosi Pada Lingkungan Asam Klorida
No full textResearch has been conducted on the extraction of cocor bebek leaves using organic solvents with various levels of solvent polarity. This is done to obtain which solvent has a corrosion inhibitor activity in the hydrochloric acid environment, where five fractions are obtained, namely n-hexane, ethyl acetate, acetone, acetic acid, and methanol. Based on quantitative analysis of cocor bebek leaf extract in variations in the polarity of solvents using a spectrophotometer with a wavelength of 511nm. The flavonoid content in cocor bebek leaf extract produced using acetone solvent showed the highest yield. Corrosion rate of carbon steel in 0.1M HCl solution; 0.05M; 0.01M with the addition of cocor bebek leaf extract decreased as the concentration of extract increased and reached the lowest decrease in the addition of extracts in acetone solvent around 200 ppm with a corrosion rate of 42.18 mpy in 0.1M HCl solution and at an increase in extract concentration there was a decrease does not show a significant reduction in corrosion rate. For 0.05M HCl solution and 0.01m concentration showed a decrease in corrosion rate until the addition of 1500 ppm extract. The results of the extract using acetone solvent showed the corrosion rate of carbon steel in 0.1M HCl solution; 0.05M; and 0.01M lower than the extract results with other solvents (ethyl acetate, methanol, and 5% acetic acid).Telah dilakukan penelitian mengenai ekstraksi daun cocor bebek dengan menggunakan pelarut organik dengan berbagai tingkat kepolaran pelarut. Hal ini dilakukan untuk memperoleh pelarut mana yang mempunyai aktivitas inhibitor korosi pada lingkungan asam klorida, dimana diperoleh lima fraksi yaitu fraksi n-heksana, etil asetat, aseton, asam asetat, dan metanol. Berdasarkan analisis kuantitatif ekstrak daun cocor bebek dalam variasi sifat kepolaran pelarut menggunakan alat spektrofotometer dengan panjang gelombang 511nm. Kandungan flavanoid dalam ekstrak daun cocor bebek dihasilkan menggunakan pelarut aseton menunjukkan hasil paling tinggi. Laju korosi baja karbon dalam larutan HCl 0,1M; 0,05M; 0,01M dengan penambahan ekstrak daun cocor bebek mengalami penurunan seiring dengan peningkatan konsentrasi ekstrak dan mencapai penurunan terendah pada penambahan ekstrak dalam pelarut aseton sekitar 200 ppm dengan laju korosi 42,18 mpy dalam larutan HCl 0,1M dan pada peningkatan konsentrasi ekstrak terdapat penurunan laju tidak menunjukkan penurunan laju korosi yang signifikan. Untuk larutan HCl 0,05M dan 0,01m konsentrasi menunjukkan penurunan laju korosi sampai pada penambahan ekstrak 1500 ppm. Hasil ekstrak menggunakan pelarut aseton menunjukkan laju korosi baja karbon dalam larutan HCl 0,1M; 0,05M; dan 0,01M lebih rendah dibandingkan hasil ekstrak dengan pelarut lain (etil asetat, metanol, dan asam asetat 5%)
Extract of Cocor Bebek (Kalanchoe pinnata) as a Corrosion Inhibitor
No full textIn this study, Cocor Bebek leaves (Kalanchoe pinnata) extract is studied for metal corrosion inhibitor. 10.3 kg of K. Pinnata leaves produce concentrated extract of methanol, n-hexane and ethyl acetate as much as 65.7442, 36.1452, and 15.2711 g respectively. The concentrated extracts were then used to determine the rate of corrosion. Corrosion rate test showed that extract of ethyl acetate can reduce corrosion rate of carbon steel in NaCl 3.5% from 2.954 mpy to 0.963 and 0.923 mpy using 500 ppm and 1000 ppm of extract consecutively. Corrosion rate of Cocor Bebek extract at addition of 500 ppm ethyl acetate in the solution of NaCl 3.5% is decreasing immediately. It was found that the carbon steel corrosion rate decrease as much 4.857 for 6 hours and continuously shows sharp decline until 24 hours of corrosion time. Corrosion rate is slowly decreasing till reach 1.694 mpy at corrosion time of 168 hours
Penggunaan metode ekstraksi maserasi dan partisi pada tumbuhan cocor bebek (kalanchoe pinnata) dengan kepolaran berbeda
No full textHas conducted research of the preparation Cocor Bebek plants as raw materials for corrosion test by using two methods of extraction are maceration and partition. Maceration process is done by using methanol, which will then be concentrated by using a rotary evaporator to produce concentrated methanol extract. The next stage is the process of partitioning using a solvent n-hexane and ethyl acetate, and of the steps that have been made, from the fresh leaves Cocor Bebek generated as much as 10.3 kg of concentrated methanol extract as much as 65.7442 g, n-hexane extract as much as 36.1452 g, and the ethyl acetate extract as much as 15.2711 g.Telah dilakukan penelitian mengenai preparasi Tumbuhan Cocor Bebek sebagai bahan baku untuk uji korosi dengan menggunakan dua metode ekstraksi yaitu maserasi dan partisi. Proses maserasi dilakukan dengan menggunakan pelarut metanol, yang kemudian akan dipekatkan dengan menggunakan rotary evaporator sehingga dihasilkan ekstrak pekat metanol. Tahap selanjutnya adalah proses partisi dengan menggunakan pelarut n-heksan dan etil asetat, dan dari tahapan yang telah dilakukan, dari daun segar Cocor Bebek sebanyak 10,3 kg dihasilkan ekstrak pekat metanol sebanyak 65,7442 g, ekstrak n-heksan sebanyak 36,1452 g, dan ekstrak etil asetat sebanyak 15,2711 g
Isolasi Senyawa Flavonoid dari Tumbuhan Cocor Bebek Sebagai Sediaan Inhibitor Korosi
No full textBerbagai spesies tanaman Kalanchoe telah digunakan secara luas untuk bahan baku obat tradisional dan juga sebagai tanaman hias. Penelitian ini merupakan penelitian lanjutan dari pencarian senyawa metabolit sekunder dari tumbuhan Kalanchoe Indonesia. Daun segar Kalanchoe pinnata sebanyak 6 kg diekstraksi dengan metanol pada temperatur kamar sehingga diperoleh ekstrak pekat metanol. Ekstrak pekat metanol selanjutnya dipartisi berturut-turut dengan n-heksana dan etil asetat. Ekstrak semipolar kemudian dilakukan isolasi senyawa flavonoid dan dihasilkan isolat berwarna kuning melalui berbagai teknik kromatografi. Struktur kimia isolat ditentukan berdasarkan hasil analisis spektroskopi UV, IR, MS, 1H-NMR, 13C-NMR serta perbadingan data spektroskopi yang diperoleh dari literatur dan diidentifikasi sebagai senyawa flavonoid yaitu 3,3’,4’,5,7 pentahidroksiflavon atau kuersetin.Various species of Kalanchoe plant has been widely used for traditional medicine and also as an ornamental plant. This research is a continuing search for secondary metabolites from Kalanchoe plants in Indonesia. The fresh leaves of Kalanchoe pinnata (6 kg) was extracted at room temperature with methanol to obtain a concentrated extract. The concentrated extract of methanol was further partitioned successively with n-hexane and ethyl acetate. Yellow solid of pure isolates from ethyl acetate extract was separated by various chromatographic techniques. The chemical structure of isolates was determined by spectroscopic analysis of UV, IR , MS, 1H-NMR, 13C-NMR data and a comparison wih those previously reported on literature and identified as a flavonoid compound 3,3’,4’,5,7 pentahydroxyiflavone also known as kuersetin which belong to the flavonol class
MEKANISME PEMBAYARAN ROYALTI UNTUK KEPENTINGAN KOMERSIAL BERDASARKAN UNDANG-UNDANG NOMOR 28 TAHUN 2014 TENTANG HAK CIPTA
No full textCopyright is an intangible property right that is born automatically based on declarative principles after a work is manifested in a tangible form. Especially in the fields of song and music, with the development of digital technology, access to both is so easy. The use of songs either to be listened to alone or to be commercialized is very massive. Protection of the creator's economic rights as regulated in Article 8 to 11 of the 2014 UUHC. In Article 1 paragraph 21 of the Copyright Law, Royalty is a balance for the use of the economic rights of a work or related product received by the creator or the owner of the related rights. In Article 40 number 1 letter d of the Copyright Law, a song or music is the result of a human intellectual work that is protected by law. Song and music creators have economic rights over the use of their creations for commercial activities, so that people or parties who use other people's song and music copyrighted works for commercial purposes must first receive permission from the creator or copyright holder of the songs and music. Then the user is required to pay royalties to the creator as a form of economic rights obtained by the creator for the use of his work for commercial purposes. The purpose of this paper is to analyze the default of the debtor's bank credit agreement. The method that the author uses in this article is to use a normative case study. The results of this study are actions taken by the debtor that harm all parties involved and the debtor must carry out the actions that have been carried out in accordance with applicable law
Pembuatan Serbuk Aloe Vera sebagai Bahan Baku Kosmetik Masker Wajah Menggunakan Metode Vacuum Drying
No full textPembuatan Serbuk Aloe Vera sebagai Bahan Baku Kosmetik Masker Wajah Menggunakan Metode Vacuum Drying
No full textSerbuk lidah buaya merupakan salah satu produk olahan lidah buaya yang banyak digunakan industri kosmetik sebagai bahan tambahan. Tujuan dari penelitian ini adalah untuk menentukan kondisi operasi dan konsentrasi zat aditif dengan variasi temperatur operasi (50oC, 60oC, dan 70oC) dan variasi konsentrasi maltodekstrin (6%, 7%, 8%, dan 9%) dalam pembuatan serbuk lidah buaya untuk mencapai kandungan antrakuinon terendah dan kandungan glukomanan tertinggi. Bahan yang digunakan adalah lidah buaya (Aloe Vera barbadensis.) yang dilakukan perlakuan awal sebelum pengeringan. Serbuk lidah buaya diukur kadar air, rendemen, kandungan antrakuinon dan kandungan glukomanan. Hasil menunjukan bahwa pada temperatur 60oC dan konsentrasi maltodekstrin 8%, serbuk lidah buaya memiliki kadar air 6,92%; rendemen 9% kandungan antrakuinon 20,8%; dan kandungan glukomanan 11,5% merupakan hasil terbaik.
Aloe vera powder is one of processed aloe products are widely used cosmetic industry as an additive. The purpose of this study was to determine the optimum operating conditions and concentrations of additives by variations in the operating temperature (50, 60, and 70°C) and the variation of the concentration of maltodextrin (6, 7, 8, and 9%) in the manufacture of aloe vera powder to reach the lowest anthraquinone content and highest glucomannan content. Materials used are pre treated aloe vera (Aloe Vera barbadensis.) before drying process. Aloe vera powder measured water content, yield, anthraquinone content, and glucomannan content. Results showed that at temperature of 60° C and a concentration of 8%. Aloe vera powder has a water content of 6,92%; 9,00% yield; glucomannan content of 11,50%; and 27.30% anthraquinone content is the best results
Penentuan Pelarut Terbaik pada Ekstraksi Tanin Kulit Kayu Akasia dan Pengaruhnya Sebagai Inhibitor Laju Korosi pada Baja Karbon
No full textCarbon steel in industrial equipment which direct contact with the environment will eventually be corroded. The rate of corrosion could be slowed by organic inhibitors of tannin compounds contained from acacia trees. Tannins were obtained from the extraction process using methanol and ethanol. The aims of this research were to determine the best solvent in the extraction process of acacia bark based on the largest tannin content and to study the effect of tannin as a corrosion inhibitor on carbon steel in the corrosive media through weight reduction methods. The extraction process used maceration at room temperature for two hours with a solid:solvent ratio of 1:10. The solvents were ethanol and methanol. The extract was evaporated in a rotary evaporator at 50 oC, 100 mbar became a paste form. Bark extract was added as an inhibitor in 0.5 M H2SO4 corrosive media; HCl 0.5 M; sea water, and tap water with the addition of inhibitor concentrations of 4%, 6% and 8% (w /v). Immersion was carried out for 12, 24, 36, 48, 60 and 72 hours. Methanol was a better solvent than ethanol with a yield of 4.57% and tannin concentration of 2.768 ppm. Tannin in acacia bark extract is suitable to be used as a corrosion inhibitor in acidic media such as H2SO4 0.5 M and 0.5 M HCl with the highest efficiency gains are 81.20% and 53.06%, respectively
Penentuan Pelarut Terbaik pada Ekstraksi Tanin Kulit Kayu Akasia dan Pengaruhnya Sebagai Inhibitor Laju Korosi pada Baja Karbon
No full textKARAKTERISASI SILIKA DARI ABU AMPAS TEBU
No full textSilica has been successfully extracted from sugarcane bagasse ash by using alkali method. Extraction was carried out using sodium hydroxide solution to obtain sodium silicate solution and solid residue. Then, hydrochloric acid solution was added to sodium silicate solution until pH of solution was 7 and silica was formed. Furthermore, silica was heated in oven at 150 ËšC and calcined at 700 ËšC. Variation of this study were extraction time (1, 2 and 3 hours). The synthesized silica were characterized functional groups, acidity level, water adsorption ability and adsorption ability of Cu2+ ion. The results of FTIR analysis showed that all silica contain siloxane group. Silanol group did not appear because during calcination process occured the condensation reaction of silanol group. Other characterization results showed that silica with extraction time of 2 hours had highest acidity level, water adsorption ability and adsorption ability of Cu2+ ion, which were 6.201 mmol/gram, 86.41% and 92.55%.
Keywords : bagasse ash, extraction, silica, siloxan
