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(A Study of Isothrm Sorption, Temperature and Number of Layers on the K Value of Coconut Fiber) H Guring Pohan; Yang Yang Setiawan
Warta Industri Hasil Pertanian Vol 17, No 1-2 (2000)
Publisher : Balai Besar Industri Agro

The rsearch of coconut fiber has been carried out to determined isotherm sorption and rate of weight decrease during drying. Isotherm sorption was done by adjusting room water activity which are 10%, 35%, 65%, 90% and 99%. The calculating data of research show linier regression with equation Y= 0.336156 X - 0.02038, R2= 0.9743, C=15.49 and m0=3.16. decreasing weinght of fiber was studied to find out the effect of amount of layer (1, 3 and 5 layers) and drying temperature (50 C, 60 C and 70 C). The result show that the temperature has no significant effect while amount of layer very significant to the dryness of fiber. The highest k value was found in the 1 layer treatment between 0.47912 - 0.85270, while the lowest k value found in the 5 layers treatment those are vary between 0.16770-.19793.

The Study of Extraction Methods and Characteristic of Red Fruit Oil (Pandanus conoideus LAM) H Guring Pohan; Ning Ima Arie Wardayanie
Warta Industri Hasil Pertanian Vol 23, No 01 (2006)
Publisher : Balai Besar Industri Agro

The study on the effect of oil extraction methods of red fruit using of amount water on the characteristic of red oil has been conducted.There were two methods used in this study,i.e:wet rendering using the water and dry rendering using the steam.In wet rendering the process was included a traditional process nd developed/modified of traditional process by using comparison between red fruit and water are1:2 anf 1:4;mean while dry rendering consist of blenders-steam-press and steam-blender-press.The result showed that the best treatment of oil extraction for red fruit were using the developed/modified of traditional process by using comparison between red fruit and water in 1:4 with have characteristic of red oil were followed :the yield of oil 4.61%,moisture content 3.54%,free fatty acid 2.96%,oleic acid 57.41%,beta-caroten 604.53 part per million (ppm) and a-tocoperol 416.82 ppm;mean while the best treatment for dry rendering (stem-blender-press)have resulted characteristic of red oil as follow :the yield oil 10.19%,moisture content2.14%,free fatty acid 2.84%,oleic acid 58.12%,beta-caroten 655.17 ppm and a-tocoperol 453.28 ppm.The result of analysis red oil not indicated content of trans fatty acid.

(The Effect of Weathering and Rolling on Drying of Cat's Whiskers (Otrhosiphon stamineus benth) Leaf H Guring Pohan; Endah Djubaedah; Noerdin N.K
Warta Industri Hasil Pertanian Vol 16, No 1-2 (1999)
Publisher : Balai Besar Industri Agro

A study on the drying of cat's whiskers leaf (Orthosiphon staminues benth has been carried out. the treatment of this study were A) fresh leaf weathered, rolled and then dried. the analysis of dried cat's whiskers leaf include: yield, color, moinsture, ash, potassium, extract and sinensetin content. the result of dried leaf analysis showed the yield 18.09%, ash 12.09%, extract content 21.43% and senensetin 1.47% at the treatment of D (fresh leaf weathered, rolled and the dried) compared with another treatment and the color is slightly brown. the lowes the moinsture was 8.66% at the treatment of A (fresh leaf were dried directly).

(Curcuma domestica Val.)(Study on the Effects of Ethyl Alcohol Concentration and Particle Mesh on the Yield and Curcumin Content of Oleoresin Curcuma (Curcuma domestica Val.) Eko Susanto; H Guring Pohan; Lucyana -
Warta Industri Hasil Pertanian Vol 13, No 1-2 (1996)
Publisher : Balai Besar Industri Agro

Curcuma is a jind of spices which is usually in household as food and it is also useful in the traditional medicine.Curcuma contents curcumin which usually used as a coloring agent for food.The curcuminoid can be extacted from spice by using an organic solvent.In this experiment extraction was done by using ethyl ethanol with the concentration of 70,82 and 95% and particle sizes of 20,40,60 and mesh.The extraction was carried out at 40 degree C for 5 hours.The result showed that the yield increased with the increase of solvent concentration and the increase of particle size.The curcumin content also increased with the increase of solvent concentration and particle size.The highest result of oleoresin was 28.11% with the curcumin content of 7.50%.

(The Effects of Storage Time on The Yield of Garlic Oil) H Guring Pohan
Warta Industri Hasil Pertanian Vol 6, No 01 (1989)
Publisher : Balai Besar Industri Agro

Garlic, obtained from Central Java, was distilled using cohobation method.The distillate was collected within 2.5 hrs. after first drop of oil produced. The treatment given was the storage of minced garlic at room temperature for 0,1,2,3 and 4 days before distillation. The highest yield, 0.122%, was obtained from garlic of 1 day storage. The refractive index of the oil ranged from 1.5701 to 1.5795, while the specific gravity was 1.0907 - 1.1123.

(The Effects of size, the amount of coconut fiber and mix cement with mill at producing of Ceiling) H Guring Pohan
Warta Industri Hasil Pertanian Vol 21, No 02 (2004)
Publisher : Balai Besar Industri Agro

The research on producing of ceiling was made from grey and white cement mixed with coconut fiber has been conducted. The treatment applied were size and amount of coconut fiber added, cement, white cement, mill and water. the characteristic of product was analysed for is density. moinsture content, water absorption capability, linier and vertical expansion. the result of ceiling product showed that the density was 1.59 grams/cm3, moinsture content 13.6%, water absorption capability 13.06%, vertical expansion 2.74% and linier expansion 0.49% at the treatment of size of coconut fiber were 10-12 cm, and the amount of coconut fiber were 100 grams and mix cement with mill.

(Technical Testing of Rotary Dryer for Cat's Whiskers Leaf (Orthosiphon stamineus benth)Leaf H Guring Pohan; Endah Djubaedah; Noerdin N.K
Warta Industri Hasil Pertanian Vol 16, No 1-2 (1999)
Publisher : Balai Besar Industri Agro

Technical testing of rotary dryer was conducted to dry Cat's whiskers leaf (Orthorsiphon stamineus benth) the aim of the technical testing is to evaluate of performance the rotary dryer for drying cat's whiskers leaf. the drying temperature suitable for cat's whiskers leaf was 50-60 C. the result showed that the dryer reduce moisture from 72.47 % to 9.95% with drying rate 22.5% per-hours. The capacity of dryer is 2000 grams a batch and the heat efficiency was 14.05%.

(Design and Performance Testing of Dryer and Clarifyer Equipment on Processing of Virgin Coconut Oil) H Guring Pohan; Dadang Supriatna
Warta Industri Hasil Pertanian Vol 21, No 02 (2004)
Publisher : Balai Besar Industri Agro

Design and performance testing study of the dryer and the clarifyer equipments of Virgin Coconut Oil (VCO) has been done for producing better quality of the product. The power of the electrical motor for stirrer of the dryer used was 5 hp and it has reduced from 1500 rpm to 300 rpm using gear box T.S. 80 type and finally become 4 rpm on the stirrer in order to running well. Electrical motor connected to the timer apparatus to change the rotation of the dryer which automatically work well so that the grated coconut meat to be dried accepted the heat energy uniformly. The flow direction of the refinery of oil and the fluid (mix of the oil and water) from the bottom of the refine equipment was raised up and then went down to the bottom, so that the oil product did not break to the treatment of heat. According to this indicated that the stirrer apparatus could worked well. Analytical result shows that the VCO moisture content is 0,11 %, free fatty acid is 0,22 % and lauric acid is 49,92 %. The whole of equipments system process is running well. Drying rate of water at 70 C, condition is 7,9% (w/w) per hour, heating efficiency is 18,99% at 6 hours drying time, capacity of dryer 231,1 kg per batch, efficiency of the refinery oil per batch 97 %.

(The Effect of Type of Container and Storage on the Change of pH and Heavy Metal Migration on Moni Juice (Morinda Citrifolia L.) H Guring Pohan
Warta Industri Hasil Pertanian Vol 20, No 1-2 (2003)
Publisher : Balai Besar Industri Agro

A study on the effect of type of container and storage time of nony liquid has been conducted.the research were the type of plastic and storage time. the observation done were pH and heavy metal such as: PB,Cu,Fe,Co, the result shows there was no significant effect on the chage of pH and metal migration the contains of Cu between; 0,20-1,22 ppm for plastic drum and 0,25-077 ppm for plastic bottle and fe between :2,20-3,48 ppm for plastic drum the change of pH between 3,73-4,62 for plastic drum and 3,74-4,64 for plastic bottle during storage on nony liquid .

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