Judul: Studi Potensi dan Penyebaran Ulin (Euxideroxylon zwagerii Teijsm. & Binnend.) pada Kawasan Lindung Areal IUPHHK-HT PT. Wana Hijau Pesaguan, Propinsi Kalimantan Barat.
Abstrak: The rapid rate of deforestation and illegal logging in Indonesia led to the decreasing number of Ulin in Indonesia. The aim of this study is to examine the potential and deployment of Ulin trees (Euxideroxylon zwageri), as well as to determine the type of vegetation in habitats Ulin tree ( ) are useful in conservation efforts a protected plant in the area of PT. Green Pesaguan Wana, West Kalimantan. Technique sampling vegetation analysis in this study using a single plot measuring 100 m x 100 m with a number of sub-plots as much as 25 sub-plot with an area of 20 m x 20 m. Results from the analysis of data obtained species diversity index (H ') is highest ironwood on the right side of the river border region with a value H' is 4,820. Evenness index (E) in four locations including high because ranged from 0866 to 0919 and the highest evenness values obtained at the location of riparian right. Potential ironwood (Eusideroxylon zwageri) based on the largest volume in the area of germplasm protected areas is 16:40 m3 / ha. Total biomass ironwood obtained on the river banks right side of 0.77 tonnes / ha of total 310.72 tons / ha, the location of river banks left obtained biomass ironwood $ 3.10 tonnes / ha of 123.96 tonnes / ha, the location with a slope of more than 25% have a biomass Ironwood at 4:09 tonnes / ha of total 440.24 tons / ha, protected areas germplasm has the largest total biomass ironwood is 9:42 tonnes / ha of 213.55 tons / ha. Ironwood distribution pattern (Eusideroxylon zwageri) generally at the four study sites is to be equal to 1 (one), it is stated that the growth pattern of the spread of ironwood is random (random).
Keyword: evenness, density, distribution pattern, Ulin

Judul: Total Phenolic and Total Flavonoid Contents of Various Accession of Ironwood (Eusideroxylon zwageri) from Kalimantan
Abstrak: Pohon ulin (Eusideroxylon zwageri) menjadi salah satu pohon yang dilindungi dan terancam punah. Kandungan senyawa metabolit sekunder pada pohon ulin diduga memiliki ketahanan tinggi terhadap serangan hama seperti rayap. Penelitian ini bertujuan mengukur kadar fenolik total dan kadar flavonoid total dari 15 aksesi kayu ulin asal Kalimantan. Simplisia kayu ulin diuji kadar air, serta ekstrak etanol kayu ulin diuji kadar fenolik total dan flavonoid totalnya. Data dianalisis menggunakan uji one-way ANOVA, uji lanjut Tukey, dan Analisis Komponen Utama (AKU). Hasil penelitian menunjukkan kadar air dari 15 aksesi mempunyai rentang nilai 4,85 – 9,36 % (b/b). Kadar fenolik total dan flavonoid total tertinggi yaitu pada aksesi XVI.E.197 dan IX.C.7 secara berturut-turut sebesar 700,55 mg GAE/g dan 16,81 mg QE/g. Hasil skor plot AKU menunjukkan klasterisasi terbagi menjadi tiga kelompok yaitu rendah, sedang, dan tinggi. Dengan demikian, perlu dilakukan uji lanjutan untuk menganalisis senyawa spesifik yang terkandung dan melakukan uji aktivitas ekstrak kayu ulin sebagai anti rayap., The ulin tree (Eusideroxylon zwageri) is one of the protected and endangered trees. The content of secondary metabolite compounds in ulin trees is thought to have high resistance to pests such as termites. This study aims to measure the total phenolic content and total flavonoid content of 15 ironwood accessions from Kalimantan. Simplisia of ulin wood was tested for moisture content, and ethanol extract of ulin wood was tested for total phenolic content and total flavonoids. Data were analyzed using one-way ANOVA test, Tukey test, and Principal Component Analysis (PCA). The results showed that the moisture content of the 15 accessions ranged from 4,85 – 9,36% (w/w). The highest total phenolic and total flavonoid levels were in accessions XVI.E.197 and IX.C.7 at 700,55 mg GAE/g and 16,81 mg QE/g, respectively. The results of the PCA plot score show that the clusterization is divided into three groups, namely low, medium, and high. Thus, it is necessary to conduct further tests to analyze the specific compounds contained and test the activity of ironwood extracts as termite repellents.
Keyword: accession, Eusideroxylon zwageri, flavonoid, ironwood, phenolic

Judul: Pembuatan Sistem Kontrol Gas Amonia Berbasis Mikrokontroler Arduino.
Abstrak: Gas amonia adalah salah satu gas yang beracun yang dapat meneyebabkan kematian pada manusia atau hewan. Dalam penelitian ini dibangun sebuah sistem pengontrol yang dapat mengatasi bahaya keracunan akibat adanya gas amonia. Sistem pengontrol dibuat menggunakan dan menggunakan relay sebagai saklar otomatis untuk kipas, kipas yang digunakan sebagai pembuang gas amonia, sensor MQ-135 sebagai sensor pendeteksi keberadaan konsentrasi gas amonia dalam satuan part per million (ppm). Sistem pengontrol beroperasi menggunakan arduino uno untuk mengirim perintah on/off otomatis pada relay sebagai saklar otomatis dari kipas, ketika sensor membaca konsentrasi gas diatas 5 ppm maka peintah yang dikirim adalah on kemudian kipas akan menyala dan apabila dibawah 5 ppm perintah yang dikirim adalah off kemudian kipas mati.
Keyword: gas amonia, sensor mq-135, relay, arduino uno, sistem pengontrol