Judul: Penyusunan Kurva Tinggi Pohon Dalam Rangka Pelaksanaan IHMB Di IUPHHK-HA PT. Ratah Timber Kalimantan Timur
Abstrak: In effort to gain the sustainable forest, management of forest is needed through forest management planning with accurate, rational, and in direction. For that reason is it necessary to create activity of IHMB. The purpose of this activity is to detect or measure timber standing stock periodically, also as trend monitoring sustainability of standing stock in IUPHHK areas. The availability of supporting tools in IHMB is very needed in order to accelerate the activity and decreasing an error that might be happen in measurement. One of supporting tools is tree height curve that used to estimate height of the standing tree in forest stand where measured, and at the last we can estimate the standing stock. This research conducted to arrange the tree height curve for Dipterocarpaceae species and mixture timber species in future aims can useful as supporting tools in implementation of IHMB activities in PT. Ratah Timber East Kalimantan. In this research, sample trees that carried out for Dipterocarpaceae species is 201 trees sampling with the specification 135 trees for modeling and 66 trees for validation. Meanwhile, for mixture timber species is 192 trees sampling with the specification 129 trees for modeling and 63 trees for validation. That trees sampling is chosen by purposive sampling method with the requirements of trees sampling is spread in around of IUPHHK-HA PT. Ratah Timber East Kalimantan areas. The chosen of trees sampling condition should have good growth and healthy. From the result of this research through modeling and validation method, we can get the best of tree height estimation for Dipterocarpaceae species is Tbc = 5.383D0.354 and Tt = 8.770D0.326. In other hand, for mixture timber species is Tbc = 5.754D0.322 and Tt = 8.954D0.310. From the slope uniformity significance and elevation through those equation, so it can be concluded that the relation between height of tree (Tbc and Tt) with diameter of tree from Dipterocarpaceae species and mixture timber species is similar, so both of those regression can combined as one of regression uniformity form combination. Form of that regression uniformity form combination is Tbc = 5.534D0.340 and Tt = 8.851D0.319.
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Judul: Penyusunan Tabel Volume Lokal Jenis Keruing (Dipterocarpus spp.) di IUPHHK-HA PT. Sarmiento Parakantja Timber, Kalimantan Tengah
Abstrak: In order for the forest sustainability can be ensured, need to do a good forest management plan, careful and accurate information and reliable. The information needed is data about the potential of forest stands. Potential prediction of forest stands are related to the timber volume prediction. To collect such information, then the forest inventory of activities needs to be done. One of the tools to simplify and accelerate the activities of forest inventory is the volume table. Prediction tree stand volume by using the volume table will be more efficient and save costs and time. The purpose of this research is to develop a local volume table of keruing (Dipterocarpus spp.) in the area of IUPHHK-HA PT. Sarmiento Parakantja Timber, Central Kalimantan. The table volume made is table volume premises with diameter of trees as high as the chest (Dbh) as free variables. The preparation of a volume table is done using three models a regression equation with a diameter as free variables. A model of an equation probe volume was selected from third best model the regression equation is based on criteria test statistics in the preparation and validation model. The test criteria, namely the coefficient of determination (R2), standard deviation (s), diversity analysis, refraction, aggregate deviation (SA), average deviation (SR), the Root Mean Square Error (RMSE), and mean difference test chi-squared (χ2). Based on these criteria, the model equations estimators keruing (Dipterocarpus spp.) is a model equation Berkout V = 0, 0003631Dbh2, 26 with the value s = 0,059, R2 = 98,70%, Fhitung = 4875,51%, bias = 14,81%, SA = 0,03, SR = 11,04%, RMSE = 19,12,% and χ2 = 1,37.
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Judul: Viksositas dan sifat kimia jelly drink bio yogurt dalam bentuk granul selama penyimpanan
Abstrak: Yogurt is a milk fermented product that is now very commonly consumed. Probiotic yogurt or bio yogurt, is yogurt enriched with probiotic bacteria Lactobacillus acidophillus and Bifidobacterium bifidum. Bio yogurt is categorized as functional food because of its benefit to human health. Bio yogurt can be diversified into product such as jelly drink. Jelly drink bio yogurt in the form of liquid has a few disadvantages such as low shelf life.
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