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All Journal Warta IHP (Warta Industri Hasil Pertanian)
Darma, Gasik
Balai Besar Industri Agro
Agriculture, Biological Sciences & Forestry Industrial & Manufacturing Engineering

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(The Effect of Catalyst, Temperature and Process Duration on The Production of Methyl Ricinoleate from Castor Oil) Guring Pohan, Hitler; Susanto, Eko; Darma, Gasik
Warta Industri Hasil Pertanian Vol 8, No 01 (1991)
Publisher : Balai Besar Industri Agro

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Abstract

Methyl ricinoleate was produced by methanolysis process from castor oil using KOH and NaOH as catalysts. The esterification process was carried out at the temperature of 30 derajat and 70 derajat celcius for 1, 2, and 3 hrs respectively. The product was analyses using GC for the esterification process. The iod value saponification value, and acid number were also analysed. Potassium hydroxide gave higher result in comparison to sodium hydroxide as catalyst for the process duration of 3 hrs. The specific gravity of the product ranged from 0.8903 to 0.9608 and the refractive index was between 1.3810 and 1.4500.
(The Effect of Solvent and Particle Size on The Yield and Piperin Content of Oleoresin from White Pepper Waste (Piper Nigrum Linn) Darma, Gasik; -, Lucyana; Pohan, H.G.
Warta Industri Hasil Pertanian Vol 8, No 01 (1991)
Publisher : Balai Besar Industri Agro

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Abstract

The study is aimed at increasing the added value of white pepper waste products by producing oleoresin. The solvents used were ethanol 95%, ethyl acetate and dichloro ethane. The particle size of white pepper powder are 40,60,80 and 100 mesh. The highest yield of oleoresin was obtained from 80mesh powder i.e. 14.60% using ethanol 95% ; 14.21% using ethyl acetate and 14.18% using dichloro ethane. The piperine content was 41.39% in ethanol 95%: 37.95% in ethyl acetate and 41.02% in dichloro ethane.
(The effect of filler to the quality of aloe Powder) Susanto, Eko; Suryowidodo, wahyu; Darma, Gasik
Warta Industri Hasil Pertanian Vol 9, No 1-2 (1992)
Publisher : Balai Besar Industri Agro

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Aloe vera linn is neended in industries as rwa material for cosmetics, pharmacy and beverages.The types of aloe product which are available are in the form of gel,juice and powder.Aloe powder has more advantages in many cases than the other thypes.the research was conducted to study the-effect of filler in producing aloe powder.Fillers used were arabic gum and carboxyl methyl cellulose (CMC). The concentration of arabic gum applied was 1%,2% ,3% ,4%, and 5%,while the concentration of the mixed arabic gum and CMC was 2% with the ratio of 1:1,1:2,1:3,1:4,and 1:5.The best result was found with 2% filler of mixed  arabic gum and CMC with the ratio of 1:2,where pH was 5.25 and the ratio between product and the raw material was about 1:200.The viscosity of 2.50% of liqid from reconstitution of the aloe powder was 9.34 centipoise.
Mentha arvensis LINN) (An Experiment on the Distillation and Physico-chemical Determination of Mentha (Mentha) Darma, Gasik
Warta Industri Hasil Pertanian Vol 3, No 02 (1986)
Publisher : Balai Besar Industri Agro

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Experiments on the distillation and characterization of mentha leaves essential oil have been done using three type of leaves, e.g. Mentha arvensis var.piperascence ex Sukabumi and Bogor, and Mentha arvensis var. javanica ex Bogor. The yield of oil were 2.0%;1.8% and 2.7%, respectively. Menthol content of the oil were 67.6% (mentha arvensis var. piperascence ex Sukabumi) and 53.6% (M.arvensis var. piperascence ex Bogor). No menthol can be detected in the oil of M.arvensis var. javanica.
Co-Authors -, Lucyana Guring Pohan, Hitler Pohan, H.G. Suryowidodo, wahyu Susanto, Eko