p-Index From 2014 - 2019
2.255
P-Index
This Author published in this journals
All Journal Jurnal Akademika Kimia
Diah, Anang Wahid M.
Universitas Tadulako

Published : 13 Documents
Articles

Found 13 Documents
Search

Efektifitas Biji Kelor (Moringa oleifera Lamk) Sebagai Koagulan Besi (Fe) Dan Kalsium (Ca)

Jurnal Akademika Kimia Vol 4, No 2 (2015)
Publisher : Universitas Tadulako

Show Abstract | Original Source | Check in Google Scholar | Full PDF (523.977 KB)

Abstract

Research about coagulation of iron and calcium have been conducted using moringa (moringa oleifera Lamk) seed coagulant through the variation of the concentration of moringa seed and depositional time. Moringa seeds were used in this research that moringa seeds are old and dry. Compounds of moringa seeds that play role in the coagulation process of iron and calcium are proteins. This research was conducted to determine the optimum concentration of moringa seed and optimum deposition time on the process of coagulation using moringa seed coagulant in order to obtain the percentage decrease in the levels of iron and calcium. Variations in the concentration of moringa seeds were used in this research are 100, 200, 300, 400 and 500 ppm and the settling time is 30, 60, 90, 120 and 150 minutes. The results showed that the concentration of moringa seed and deposition time influenced in the process of coagulation of iron and calcium. In iron coagulation, obtained optimum concentration of 400 ppm moringa seeds and optimum settling time is 90 minutes. In these conditions the iron content decreased by 68.00 ppm or 66.95% from its initial level of 99.8 ppm. While the calcium coagulation, moringa seeds obtained optimum concentration of 500 ppm and optimum settling time of 120 minutes, which in this condition calcium levels decreased by 241 ppm or 49.00% of the initial concentration is 492 ppm.

Analisis Kalor Dan Sintesis Bioetanol Dari Serabut Kelapa Sawit Sebagai Alternatif Bahan Bakar Terbarukan

Jurnal Akademika Kimia Vol 4, No 4 (2015)
Publisher : Universitas Tadulako

Show Abstract | Original Source | Check in Google Scholar | Full PDF (389.97 KB)

Abstract

Palm fibers are solid waste from the palm oil processing plant. Palm fibers can be used as an alternative fuels for traditional and modern (bioethanol). This study aims to determine the amount of heat generated from the burning of palm fibers, and determine the number of conversions of bioethanol from palm fibers through the fermentation techniques. In this study used a bomb calorimeter is determine heat value and apply through fermentation using saccharomyces cereviseae in various times of 5 and 11 days to synthesis ethanol. The step in this study were sample preparation, delignification, hydrolysis with acid variation, and fermentation. Determination of bioethanol content from the fermentation was analysed using ethanol sensor. The heat value of palm fibers is equal to 4708.21 cal/g and the highest ethanol fermented product obtained on days 11, ie 5.23%. It can be concluded that palm fibers can be used potentially as an alternative renewable fuels to substitute coal or diesel power.

Sintesis Bioetanol Dari Jerami Padi (Oryza sativa L) Melalui Fermentasi

Jurnal Akademika Kimia Vol 3, No 4 (2014)
Publisher : Universitas Tadulako

Show Abstract | Original Source | Check in Google Scholar | Full PDF (373.788 KB)

Abstract

Rice straw is an agricultural waste into organic waste further. Rice straw can be utilized as an alternative energy that is bioethanol. The objective of this research was to determine the optimal concentration of ethanol by the duration of fermentation. This research applied fermentation to rice straw using yeast bread in various times of 7, 10, 13, 16, 19, and 22 days. The steps of this research were sample preparation, delignification, hydrolysis, and fermentation. Bioethanol from fermented rice straw was analysed using alcoholmeter. The products of fermented ethanol increased and reached the optimum at day 13, which was 4.83+0.05%, then decrease the ethanol content at day 16, 19, and 22.

Analisis Kadar Karbohidrat, Lemak Dan Protein Dari Tepung Biji Mangga (Mangifera indica L) Jenis Gadung

Jurnal Akademika Kimia Vol 4, No 4 (2015)
Publisher : Universitas Tadulako

Show Abstract | Original Source | Check in Google Scholar | Full PDF (393.938 KB)

Abstract

Mango (Mangifera indica L) seeds never to used, so they need efforts to be as food ingredients such as flour. Gadung mango seed was one type of mango seeds used as flour. This study aims to determine the nutrient content i.e. carbohydrates, fats, and proteins of Gadung mango seed flour produced through sulfurization and without sulfurization. Sodiumbisulfite (NaHSO3) with a concentration of 730 ppm was used for mango seed soak for 4 hours at sulfurization stage. The results showed that the Gadung mango seed flour through sulfurization had levels of 13.89% carbohydrate, 12.94% fat and 8.48% protein, while the mango seed flour without sulfurization had levels of 20% carbohydrate, 14.83% fat, and 4.84% protein. The technique of sulfurization on making mango seed flour can reduce levels of carbohydrates and fats as well as maintaining the protein content.

Analisis Vitamin C dan Protein pada Biji Buah Labu Siam (Sechium edule)

Jurnal Akademika Kimia Vol 7, No 1 (2018)
Publisher : Universitas Tadulako

Show Abstract | Original Source | Check in Google Scholar | Full PDF (140.52 KB)

Abstract

Chayote seeds are found in the middle of the fruit which have flat structures and white. Those seeds has never been used. This study aimed to determine the levels of vitamin C and protein in old chayote fruit seeds. The vitamin C were analyzed using a UV-Vis spectrophotometer, while the protein were analyzed using the Kjeldahl method. Results showed that level of the vitamin C in old fruit seeds was by 0.56%, while the protein level obtained was by 0.81%. This study concluded that old chayote fruit seeds contained protein and vitamin C that can be used as a source of antioxidants and source of beneficial nutrition.

Uji Aktivitas Ektrak Daun Palado (Agave angustifolia) Sebagai Antioksidan

Jurnal Akademika Kimia Vol 5, No 2 (2016)
Publisher : Universitas Tadulako

Show Abstract | Original Source | Check in Google Scholar | Full PDF (477.48 KB)

Abstract

Study on the antioxidant activity test has been conducted using palado (agave angustifolia) leaves from Tondo, Central Sulawesi. Palado plant is one of the succulent plants that can grow to a large size, and it is possible to contain antioxidant compounds. This study was conducted by an experimental method using maceration extraction technique and 1,1-difenil-2-picrylhydrazyl (DPPH) as the free radicals source, and vitamin C as the positive control, whereas UV-Vis spectrophotometer as for determining wavelength (λ) of palado leaves extracts. Sample used as much as 5 grams palado leaves, and methanol as the solvent. Variation concentrations of palado leaves extract were 20, 40, 60, 80, 100, 120, and 140 ppm. The results showed that the IC50 value of palado leaves extract was 26.182 ppm. Palado leaves extract is classified as a very powerful antioxidant based on the IC50 value. The optimum percentage antioxidant activity of palado leaves extract in inhibiting free radicals was by 84.84%.

Uji Aktivitas Antioksidan Ekstrak Air dan Ekstrak Etanol Daun Kelor (Moringa Oleifera LAM)

Jurnal Akademika Kimia Vol 6, No 2 (2017)
Publisher : Universitas Tadulako

Show Abstract | Original Source | Check in Google Scholar | Full PDF (444.909 KB)

Abstract

Moringa (moringa oleifera Lam) leaves contains many molecules as inhibitors for free radicals such as phenolic compounds (phenolic acids, flavonoids, quinones, coumarins, lignans, stilbenes, tannins), nitrogen compounds (alkaloids, amines, betalain), vitamins, terpenoids (including carotenoids), and several other endogenous metabolites as antioxidants. This study aimed to determine the antioxidant potency of water and ethanol extracts of moringa (moringa oleifera Lam) leave obtained by maceration and dekok. The concentration of free radical 1,1-diphenyl-2-picrylhydrazyl (DPPH) was analyzed using UV-Vis spectrophotometer after addition of various concentrations of Moringa leaves extracts. Various concentrations of moringa leave extracts used were 20 ppm, 40 ppm, 60 ppm and 80 ppm. Vitamin C solutions as the positive control were prepared on similar various concentrations. The negative control was prepared using DPPH solutions dissolved in absolute ethanol. The results indicated that the ethanol extract of moringa leaves prepared by maceration method showed the antioxidant potency with an IC50 value of 22.1818 ppm, but the IC50 value of water extract of moringa leaves prepared by dekok was 57.5439 ppm. While, the IC50 value of Vitamin C was 8.8084 ppm. Based on the IC50 data it can be concluded that Vitamin C is a stronger antioxidant than moringa leaves extracts.

Analisis Unsur Hara Pupuk Organik Cair dari Limbah Ikan Mujair (Oreochromis mosambicus) Danau Lindu dengan Variasi Volume Mikroorganisme Lokal (MOL) Bonggol Pisang

Jurnal Akademika Kimia Vol 6, No 2 (2017)
Publisher : Universitas Tadulako

Show Abstract | Original Source | Check in Google Scholar | Full PDF (357.207 KB)

Abstract

The Lake Lindu is one of the potential water resources in Central Sulawesi with various species of fish and one of the most commonly found fish are species mujair fish. Mujair fish processing wastes such as offal can be polluted the environment if not managed properly. The study aim is to determine the contents of NPK nutrients in the liquid organic fertilizer by adding MOL banana weevil. The contents of nitrogen (N), phosphorus (P), and potassium (K) was determined by using spectro direct. The NPK contents in the liquid organic fertilizer of mujair fish waste from Lake Lindu reached the maximum NPK contents of nitrogen (N) of 0.311% by addition 100 mL MOL banana weevil, phosphorus (P) 0.167% by addition 150 mL of MOL banana weevil, and potassium (K) of 0.037% by addition 150 mL MOL banana weevil.

Pengaruh Kaolin Terhadap Membran Blend Kitosan Poli Vinil Alkohol-Litium Sebagai Membran Elektrolit Untuk Aplikasi Baterai Ion Litium

Jurnal Akademika Kimia Vol 6, No 1 (2017)
Publisher : Universitas Tadulako

Show Abstract | Original Source | Check in Google Scholar | Full PDF (503.136 KB)

Abstract

Today, the battery is the most practical and in expensive energy storage device in a modern community. A variety of new materials technologies has been developed in the manufacture of the battery, especially the development of the solid electrolyte (solid). Polymer Electrolytes can be found in the polymer batteries form such as lithium ion polymer battery. A natural polymer such as chitosan is potential as polymer electrolyte membrane for battery applications. The chitosan has amino and hydroxyl groups that allow for modification. The modification of chitosan membrane is expected to produce the better membranes characters. The aim of this research is to study the effect of the addition of inorganic filler kaolin on the conductivity of the polymer electrolyte that made of chitosan-polyvinyl alcohol than was added to the lithium salt. The ionic conductivity of the polymer electrolyte chitosan-polyvinyl alcohol-lithium-kaolin was measured by using an impedance spectroscopy. The measurement results showed that the polymer electrolyte chitosan-polyvinyl alcohol-lithium with the addition of 4% kaolin provide the highest ionic conductivity is large 6.551x10-5 S/cm. In comparison, characteristics of batteries that made from polymer electrolyte chitosan-polyvinyl alcohol-lithium with the addition of kaolin have a voltage of 2.4 volts which have similarities to the commercial batteries. This result indicates that the kaolin can be used as a filler to increase the ionic conductivity of the polymer electrolyte chitosan-polyvinyl alcohol-lithium, and then it can be developed as a battery.

Uji Aktivitas Antioksidan Ekstrak Daun Binahong (Anredera cordifolia (Tenore) Steenis) Dengan 1,1-Difenil-2-Pikrilhidrazil (DPPH) Menggunakan Spektrofotometer UV-Vis

Jurnal Akademika Kimia Vol 3, No 4 (2014)
Publisher : Universitas Tadulako

Show Abstract | Original Source | Check in Google Scholar | Full PDF (540.748 KB)

Abstract

Testing of antioxidant activity of binahong (anredera cordifolia (tenore) steenis) leafs extracts has been done with 1,1-diphenyl-2-picrylhydrazyl (DPPH) using UV-Vis spectrophotometer. The aim of this research was to determine the antioxidant activity of binahong leafs extracts. Concentration of 1,1-diphenyl-2-picrylhydrazyl (DPPH ) after addition of binahong leafs extracts was determined using UV-Vis Spectrophotometer. Various concentrations of binahong leafs extracts were 20 ppm, 40 ppm, 60 ppm and 80 ppm. Vitamin C was the positive control used at similar variation concentrations, whereas DPPH solution dissolved in absolute ethanol was as the negative control. The results showed that the IC50 values obtained for binahong leafs extracts and vitamin C were 40.27 ppm and 49.20 ppm. Based on the IC50 data, it can be seen that binahong leafs extracts are stronger antioxidant than vitamin C.