Judul: Pendugaan Potensi Biomassa Hutan di Areal IUPHHK-HA PT. Diamond Raya Timber, Dumai, Provinsi Riau
Abstrak: Forest has an important role in absorbing CO2 which used in the process of photosynthesis to produce O2 and most of the produced energy is in the form of biomass. One type of forest that has biomass storage is peat swamp forest. The purpose of this study is to calculate the potential and the distribution of biomass in the area of peat swamp forest. The results of the study showed that forest biomass on 90 956 ha area are 17 297 664 tons. Distribution of natural peat forest biomass in this area is classified into four classes, they are low grade that has biomass potential less than 215.56 tons/ha, medium grade that has biomass potential between 215.56 to 319.86 tons/ha, high grade that has biomass potential between 319.86 to 486.53 tons/ha, and very high grade that has biomass potential more than 486.53 tons/ha. The spread of peat swamp forest consist of in low grade peat 61 100 ha with 10 387 000 tons biomass, in medium grade 17 600 ha with 4 595 888 tons biomass, in high grade 5 800 ha with 2 195 880 tons biomass and very high grade 200 ha with 118 896 tons biomass
Keyword: peat swamp forest, distribution of biomass, biomass

Judul: Pendugaan Potensi Massa Karbon Hutan Alam Tropika Rawa Gambut di Areal IUPHHK-HA PT. Diamond Raya Timber, Dumai, Provinsi Riau
Abstrak: One type of forest types which has potential in carbon sequestration and storage is peat swamp forest. The purpose of this study was to calculate the potential and distribution of carbon mass in the peat swamp forest area of IUPHHK-HA PT. Diamond Raya Timber, Dumai, Riau Province. Estimation potential total of carbon mass in forests 90 956 ha area are 8 055 234 tons. Distribution of carbon mass in the peat forests of this area are classified into four classes, consist of very high, high, medium, and low. Very high carbon mass class is over 272.54 ton ha-1, high carbon mass class is between 177.80 ton ha-1 and 272.53 ton ha-1, medium carbon mass class is between 118.82 ton ha-1 and 177.79 ton ha-1, and low carbon mass class is less than 118.82 ton ha-1. The distribution of the carbon mass potential according to the carbon mass classes are as follows in high class area 6 200 ha with carbon mass stock of 1 302 097 tons, in medium class area 18 100 ha with carbon mass stock of 2 550 718 tons, in low class area 60 400 ha with carbon mass stock of 4 202 419 tons.
Keyword: carbon mass distribution, carbon mass, peat swamp forests

Judul: Enteric Collibacillosis Pada Anak Babi Baru Lahir: Patogenesa dan Perubahan-Perubahan Patologisnya
Abstrak: Diare disebabkan oleh infeksi bakteri Escherichia coli pada anak-anak babi baru lahir yang peka terhadap en terotoksin produk bakteri tersebut. Dikenal sebagai colibacillosis. Patogenesa dari colibacillosis anak babi baru lahir adalah (1) infeksi oleh E. coli patogen, (2) proliferasi E. coli di lumen usus halus, (3) produksi dan pelepasan enterotoksin, dan (4) aktifitas toksin pada usus halus. Dalam proses proliferasi, adanya antigen pili K88 sangat penting karena memungkinkan bakteri perlekatan dengan epitel mucosa usus halus. mengadakan Setelah ko lonisasi dan proliferasi segera toksin dilepaskan. Akti- fitas toksin menginduksi sekresi yang berlebihan dari u- sus sehingga banyak cairan yang dikeluarkan ke lumen usus. Hal ini mengakibatkan banyak cairan dan elektrolit hilang sehingga timbul diare, dehidrasi dan asidosis yang sering menyebabkan kematian. Perubahan-perubahan patologis yang umum adalah dis tensi usus halus, dilatasi lambung dan infark pada kurva- tura mayor. Perubahan-perubahan histologis yang terjadi adalah enteritis hemorrhagica acuta, oedem dan kongesti pembuluh darah di lamina propria, akumulassi leukosit inti polimorf, sel monosit, dan inti sel mengalami piknosis Thrombus pada vena dan degenerasi serta desquamasi sel epitel usus….
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