Judul: Conservation Genetics of Sumatran Orangutans (Pongo abelii)
Abstrak: Sumatran orangutan orangutans (Pongo abelii ) are one of the 25 critically endangered species in the world, endemic to Indonesia. As opposed to orangutanorangutans in Borneo, studies about population and conservation genetics of orangut an species in Sumatra are still rare, although this species need needs more urgent attention due to its small er population size and drastic habitat loss. This study was designdesigned to establish the Sumatran orangutan orangutans’ population genetics database database, using sample co llections from almost all currently existing ha bitats. The study also combine combines the genetic information with its demographic historyhistory, to acknowledge their unique population s, le leading to the species species’ taxonomic classification and conservation units. This st udy was dividedivided into three topics topics, using three genetic markers (autosomal loci, hypervariable region I mitochondrial DNA and Y Y-chromosomechromosome), with different sample size sizes and methods approach. The genetic samples were collected from nine sampling locations in Aceh and North Sumatra. In the first studystudy, a combined analysis of the autosomal loci, evolutionary paternal and maternal lineages with the genetic diversity pattern over populations is clarify ing the Sumatran orangutan population genetics, defining the f our present population habitathabitats in the wild. In the second study, private alleles of specific location habitathabitats were observe observed using 28 autosomal loci to look up the allelic variation within and between populations. In the last study, 52 diagnostic of singl single nucleotide polymorphisms (SNPs) were spe cified from 20 haplotypes using the evolutionary matrilineal genetic marker as Sumatran orangutan populations “DNA fingerprinting”fingerprinting”. In general, t his study aims to help establish ing the Sumatran orangutan conservat ion units. A new taxonomic classification is recommendedrecommended, splitting population s from the north and south of Lake Toba into two evolutionary significant units (ESUs) or two subspecies , as well as specify ing three distinct population segments (DPSs; one in t he south and two in the north area of Lake Toba , the northern area of Lake Toba is divided by the large Alas River riverine barrierbarrier). In addition, it is aiming to provide important information on specific population s, to identify the origin of their indivi duals and to simplify the decision making on the re re-introduction program s. It also addresses the requirements by the “Strategi dan Rencana Aksi Konservasi Orangutan Indonesia periode 2007 2007-2017” (Conservation Strategy and Action Plan of Indonesian Orangutan, period 2007 – 2017)
Keyword: Key words: Sumatran orangutan, population genetic, conservation unit, private alleles, diagnostic SNPs SNPs.

Judul: Captive Breeding Management and Animal Welfare Level of Sumatran Orangutan (Pongo abelii) in Taman Safari Indonesia Bogor
Abstrak: Orangutan sumatera (Pongo abelii) merupakan salah satu satwa dilindungi dan dikategorikan sebagai satwa yang terancam punah (Critically endangered). Keberadaan orangutan Sumatera terus terancam seiring bertambahnya konversi habitat, perburuan, dan perdagangan. Taman Safari Indonesia merupakan salah satu Lembaga yang melakukan konservasi dan pemanfaatan orangutan sumatera secara ex situ. Penelitian ini bertujuan mendeskripsikan teknik pemeliharaan, pemanfaatan orangutan sumatera, dan mengukur tingkat kesejahteraan orangutan sumatera. Penelitian dilaksanakan dengan metode observasi lapang dan wawancara. Perhitungan tingkat kesejahteraan satwa dilakukan dengan menggunakan metode pembobotan nilai pada lima aspek kesejahteraan satwa. Teknik pemeliharaan pada aspek perkandangan, pakan, kesehatan, reproduksi, dan sumber daya manusia dilaksanakan dengan baik. Pemanfaatan orangutan sumatera yaitu sebagai objek wisata. Tingkat kesejahteraan orangutan sumatera di Taman Safari Indonesia Bogor termasuk kedalam kategori sangat baik, dengan nilai kesejahteraan sebesar 94,49 menurut pengelola dan sebesar 90,78 menurut peneliti., Sumatran orangutan (Pongo abelii) is a protected primate and categorized as a Critically Endangered species. The existence of the sumatran orangutan is seriously threatened due to habitat conversion, hunting, and trading. Taman Safari Indonesia is one of the institutions that carries out ex situ conservation and utilization of Sumatran orangutans. This research aims to describe the captive breeding management techniques, utilization of Sumatran orangutan, and measure the animal welfare of sumatran orangutans. The methods used were direct observation and interview methods. The animal welfare scores were calculated by the value of the five domains of animal welfare. Captive breeding management in the aspects of housing, feed, health, reproduction and human resources are implemented well. The use of Sumatran orangutans is as a tourist attraction. The level of sumatran orangutans welfare in Taman Safari Indonesia Bogor is classified as a very good category, with a welfare score of 94,49 according to the management and a welfare score of 90,78 according to the researcher.
Keyword: Orangutan Sumatera, Teknik Pemeliharaan, Tingkat Kesejahteraan Satwa

Judul: Penggunaan Berbagai Jenis Lateks sebagai Bahan Tambahan pada Mortar untuk Aplikasi Beton Jalan Raya
Abstrak: Lateks karet alam dikenal sebagai bahan yang memiliki elastisitas tinggi. Dengan sifatnya tersebut, lateks diharapkan dapat memperbaiki kekakuan dan kekerasan pada beton. Penelitian ini bertujuan untuk mengetahui pengaruh jenis lateks, kadar karet kering, dan umur mortar terhadap bobot, kuat tekan, dan kuat lentur mortar. Penelitian ini menggunakan rancangan acak lengkap tiga faktorial. Faktor yang digunakan adalah jenis lateks (lateks pekat, lateks pravulkanisasi semi-EV, dan lateks pravulkanisasi semi-Ebonit), kadar karet kering (0, 2, 4, dan 6 %), dan umur mortar (7, 14, dan 28 hari). Jenis lateks, kadar karet kering, dan interaksi antara jenis lateks dan kadar karet kering sangat berpengaruh nyata (P < 0.01) terhadap bobot mortar. Bobot mortar tertinggi dihasilkan pada penggunaan jenis lateks pravulkanisasi semi-Ebonit (1383.25+18.90 gram) dan kadar karet kering nol persen (1389.33+22.15 gram). Semakin banyak kadar karet yang ditambahkan, maka bobot mortar yang dihasilkan semakin ringan.
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