Judul: Profil nutrien darah domba lokal yang dipelihara di lingkungan hutan pendidikan gunung walat - Sukabumi
Abstrak: Hutan Pendidikan Gunung Walat (HPGW) merupakan daerah klimatologi yang mempunyai kelembaban relatif 80% ± 6,31% rel dan suhu lingkungan harian 25 ± 1,65 °C (Astuti dan Suprayogi 2005). Letak ketinggian daerah tersebut 500 - 700 mdpl degan topografi landai sampai bergelombang (Silamon 2004). Di hutan ini terdapat berbagai jenis tanaman yang didominasi dengan tanaman agathis, damar dan pinus, sehingga dengan demikian naungan yang lebat sangat mempengaruhi vegetasi yang tumbuh di sekitar hutan tersebut.
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Judul: Pendugaan Potensi Biomassa, Karbon, dan Serapan CO2 pada Tumbuhan Bawah di Hutan Pendidikan Gunung Walat (HPGW), Sukabumi
Abstrak: Tumbuhan bawah adalah suatu jenis vegetasi dasar yang terdapat di bawah tegakan hutan meliputi rerumputan, herba, perdu, dan paku-pakuan. HPGW merupakan hutan tanaman yang telah berubah menjadi hutan alam, sehingga potensi tumbuhan bawah di lokasi tersebut melimpah. Penelitian bertujuan untuk mengetahui potensi biomassa dan cadangan karbon pada tumbuhan bawah serta mengetahui potensinya dalam menyerap karbon dioksida (CO2). Teknik pengambilan data menggunakan metode simple random sampling, dimana plot sampel ditempatkan secara acak tanpa memperhatikan strata yang ada dalam populasi. Plot contoh yang digunakan adalah persegi dengan ukuran (2 × 2) m, total plot contoh yang digunakan dalam penelitian ini adalah 83 plot. Pengambilan data dilakukan di lapangan dan di laboratorium. Pengambilan data lapangan menggunakan metode destructive sampling (memanen seluruh bagian tumbuhan bawah, kecuali akar). Pengambilan data di laboratorium menggunakan oven dengan suhu 105°C dalam waktu 24 jam. Hasil penelitian menunjukkan bahwa rata-rata potensi biomassa, karbon, dan serapan karbon dioksida pada tumbuhan bawah berturut-turut yaitu sebesar 1,16 ton ha-1, 0,55 ton ha-1, dan 2,01 ton ha-1., The undergrowth is a type of base vegetation found under forest stands including grasses, herbs, shrubs, and ferns. HPGW is a plantation forest that has changed into a natural forest, so the potential for undergrowth in that location is very abundant. This study aims to determine the potential for biomass and carbon stock stored in understory plants and determine their potential to absorb carbon dioxide (CO2). The data collection technique used a simple random sampling method, where the sample plots were placed randomly without regard to the existing strata in the population. The sample plot used is a square with a size of (2 × 2) m, the total sample plot used in this study is 83 samples. Data collection is carried out on the ground and in the laboratory. Data collection in the field used the destructive sampling method (harvesting all parts of the understory, except for the roots). Data were collected in the laboratory using an oven with a temperature of 105°C for 24 hours. The result showed that the average potential for biomass, carbon stock, and carbon dioxide absorption in the undergrowth was 1,16 ton ha-1, 055 ton ha-1, and 2,01 ton ha 1, respectively.
Keyword: biomass, carbon dioxide, carbon stock, HPGW, undergrowth

Judul: Characterizations of low alloy steel sae 4422  plated with chromic acid (Cro3)
Abstrak: Characterizations of low alloy steel SAE 4422 plated with chromic acid (CrOrO3) was use Optical Microscopy (OM), Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), RD),Energy Dispersive Analysis of X-Ray (EDAX), Hardness Test and Roughness Test. Microstructures analysis exhibits cracks and grain boundaries microcracks as a characteristics of chrome metal found at plating metal. Perlite and Ferrite as grains of steel found at base metal with grain boundaries around it. Phase analysis of plating metal appropriate to chrome metal with lattice constant (a) is 2.559 Å and phase analysis of base metal appropriate to iron ferrite with lattice constant (a) is 3.318 Å. Both plating and base metal have cubic system. Chemical analysis of plating metal at surface section exhibits that cracks area have highest value of carbon element compare with grains and grains boundaries area. While chemical analysis of base metal at cross section exhibits that perlite have highest value of carbon element compare with ferrite and grain boundaries. The hardness value of plating metal at surface section and cross section are 753 and 637 VHN. While, the hardness value of base metal and interface area at cross section are 205 and 373 VHN. The roughness value at measurement points of chrome surface for as received sample are 0.445 μm. Observation used Optical Microscopy and Scanning Electron Microscopy exhibits surface irregularities combine to form surface texture of plating metal at surface section.
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