Judul: Pemetaan Kesesuaian Habitat Rafflesia Patma Blume  Di Cagar Alam Leuweung Sancang  Garut Jawa Barat
Abstrak: Rafflesia patma Blume is holopharasite and dioceous plant. Holopharasite means that it is completely dependent on the host plant for its nutrition and survival. Dioceous means having male and female flowers borne on separate plants. R.patma is Javan endemic plant. One of habitat R.patma is Leuweung Sancang Nature Reserve. R.patma prereservation could be done by suitability habitat mapping. The research was aimed to map suitable habitat of R.patma in Leuweung Sancang Nature Reserve. The research was conducted at Leuweung Sancang Nature Reserve on August 2008. Analysis were conducted on October 2008 until December 2008. The research used 5 physical habitat variable such as altitude, slope, distance from river, soil, LAI (Leaf Area Index) and soil classification. Map analysis was ArcView 3.2 and Erdas Imagine 9.1,mean while LAI analysis was calculated by using Hemiview. Weighting were conducted by using determined used Principle Component Analysis. There were two principle component with total initial eigenvalues 3,077 and 1,148. Physical habitat factor that gave significant effect on habitat suitability model were distance from river and soil classification. The model which was used to determine the habitat suitability in Leuweung Sancang Nature Reserve was Y = (3,077xFk1) + (3,077xFk2) + (1,148xFk3) + (1,148xFk4) +(1,148 x Fk5). The habitat suitability map were reclassified into three class, high, medium and low suitability. The result showed that were 324,373 hectares of high suitability habitat, 1701,435 hectares of medium suitability habitat and 692,893 hectares of high habitat. The habitat suitability map could be accepted by showing the validation about 93% for the high habitat suitability.
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Judul: Population and Habitat Conditions of Rafflesia patma Blume in the Pangandaran Nature Reserve, West Java
Abstrak: Rafflesia patma Blume merupakan tumbuhan langka dan dilindungi yang tersebar di pulau Jawa, salah satunya di Cagar Alam Pangandaran. R. patma memiliki ciri biologis yang berbeda dengan tumbuhan lain yaitu memerlukan kondisi lingkungan tertentu untuk mendukung perkembangbiakan dan pertumbuhannya. Tujuan penelitian ini yaitu untuk mendeskripsikan kondisi dan menganalisis faktor biotik juga abiotik pada habitat R. patma di Cagar Alam Pangandaran. Metode yang digunakan adalah purposive sampling dengan plot lingkaran berukuran jari-jari 17,8 m. Hasil identifikasi ditemukan 202 individu pada 15 plot penelitian yang terdiri dari kuncup mati, kuncup hidup dan mekar mati. Tumbuhan inang yang ditemukan merupakan spesies Tetrastigma leucostaphylum. Kondisi vegetasi yang mendominasi pada tingkatan pohon, pancang dan semai yaitu Vitex pubescens, Dyospyros oblonga dan Flacourtia rukam. Satwa yang ditemukan pada habitat R. patma sebanyak 8 spesies. Habitat R. patma ditemukan pada ketinggian 40 – 120 mdpl, kemiringan 4 – 35 %, jenis tanah lempung berwarna coklat kemerahan sampai abu-abu kehitaman, suhu rata-rata 27,4ºC, kelembapan 60-94% dan nilai indeks luas daun berkisar 1,82 – 2,15., Rafflesia patma Blume is a rare and protected plant that is spread across the island of Java, one of which is the Pangandaran Nature Reserve. R. patma has different biological characteristics from other plants, namely that it requires certain environmental conditions to support its reproduction and growth. The aim of this research is to describe the conditions and analyze biotic and abiotic factors in the R. patma habitat in the Pangandaran Nature Reserve. The method used was purposive sampling with a circle plot measuring 17.8 m radius. The identification results found 202 individuals in 15 research plots consisting of dead buds, live buds and dead blooms. The host plant found was the Tetrastigma leucostaphylum species. The vegetation conditions that dominate at the tree, sapling and seedling levels are Vitex pubescens, Dyospyros oblonga and Flacourtia rukam. Eight types of animals were found in the R. patma habitat. The habitat of R. patma is found at an altitude of 40 – 120 meters above sea level, slope 4 – 35%, clay soil type reddish brown to blackish gray, average temperature 27.4ºC, humidity 60-94% and leaf area indeks value around 1, 82 – 2.15.
Keyword: abiotik, biotik, habitat, populasi, Rafflesia patma Blume

Judul: Kinerja Inhibitor Korosi Zink bis(disetilditiofosfat) terhadap Logam Cu dengan Teknik Polarisasi Potensiodinamik
Abstrak: Zink dialkilditiofosfat (ZDTP) telah digunakan sebagai aditif pelumas automotif dengan beberapa manfaat di antaranya sebagai antiaus, antioksidan, dan inhibitor korosi. Senyawa ZDTP dengan alkil rantai panjang, memiliki kestabilan termal yang tinggi dan memberikan kinerja inhibisi korosi yang lebih baik dibandingkan dengan alkil rantai pendek dan bercabang. Rendemen sintesis Zink bis(disetilditiofosfat) diperoleh sebesar 87%. Pengukuran aktivitas Zink bis(disetilditiofosfat) dengan teknik polarisasi potensiodinamik menghasilkan efisiensi inhibisi terhadap korosi sebesar 75% pada konsentrasi larutan sampel 3.0%, dengan perubahan laju korosi pada logam tembaga dari 17.20 mm/tahun ke 4.30 mm/tahun. Spontanitas korosi dihambat dengan adanya ZDTP16, ditunjukkan oleh perubahan nilai energi bebas Gibbs dari 72.15 kJ mol-1 menjadi 87.53 kJ mol-1 dan energi aktivasi naik dari 51.76 kJ mol-1 ke 71.60 kJ mol-1 yang menunjukkan terjadinya penurunan laju reaksi korosi.
Keyword: efisiensi inhibisi, kinetika, laju korosi, termodinamika, zink bis(disetilditiofosfat)