Judul: Diversity of Bird Species in Secondary Forest of Riau University, Pekanbaru City
Abstrak: Kawasan hutan sekunder Universitas Riau berpotensi untuk melestarikan keanekaragaman hayati khususnya burung. Penelitian bertujuan untuk menghitung keanekaragaman jenis burung, membandingkan perbedaan komposisi jenis burung pada beberapa transek, dan mendeskripsikan habitat burung di hutan sekunder Universitas Riau. Penelitian dilaksanakan pada bulan Maret hingga April 2021 di Hutan Sekunder Universitas Riau. Data burung diambil menggunakan metode IPA (Index Point of Abundance). Data diolah untuk mendapatkan indeks keanekaragaman Shannon-Wiener (H’), indeks kemerataan (E), kekayaan spesies (S), penaksiran spesies Chao, indeks kesamaan Bray-Curtis (B), serta habitatnya. Ditemukan 68 jenis burung dari 28 famili di seluruh lokasi pengamatan. Habitat patch danau memiliki nilai keanekaragaman jenis yang tertinggi (H’: 3,097, S: 39 spesies, Chao: 54; E: 0,845). Patch kecil memiliki jumlah jenis spesies terbanyak (S: 40 spesies, Chao: 40, H’: 2,925; E: 0,793), sedangkan pada patch besar 2 memiliki jumlah jenis burung paling sedikit (S: 23 spesies, Chao: 32; H’: 2,938; E: 0,937). Hasil penelitian ini menunjukkan bahwa gangguan manusia atau spesies lain dapat memengaruhi keanekaragaman dan kekayaan spesies, sedangkan ukuran patch tidak begitu berpengaruh terhadap keanekaragaman dan kekayaan jenis burung yang ada di dalamnya.
Keyword: Universitas Riau, Kota Pekanbaru, Keanekaragaman, Burung, Patch

Judul: Keanekaragaman jenis Burung pada beberapa tipe Habitat di Hutan Penelitian Dramaga, Bogor, Jawa Barat
Abstrak: Dramaga Research Forest, located in the outskirt of Bogor, provides a good habitat for birds. This research was aimed to study bird diversity, identifying habitat characteristics (around the forest path, along house edge, riparian habitat and the interior area) and recorded the activities of the local people around the forest. Point count, MacKinnon list, habitat profiling and interviews were conducted. Shannon-Wiener diversity indices and similarity level were calculated. The highest index of species diversity was in the interior area (2.34), followed by around the forest path (2.21), along house edge (1.97) and riparian habitat (1.86). The highest species richness, however, was in the riparian habitat (27 species), the forest path had 21 species, along house edge had 26 species, while the interior area was a home for 21 bird species. The highest similarity (0.81) was between forest path and interior area. On the activities of the local people, the most often was firewood harvesting. Other activities were hunting for cage birds, harvesting ferns, harvesting wild fruit and harvesting ant larvae. Activity that might disrupt the bird population was hunting.
Keyword: Bogor Agricultural University (IPB), Dramaga research forest, human activities, Bird diversity, Streptopelia chinensis, Orthotomus sepium

Judul: Stabilization of Protein by Lactose during Storage in the MPC 85 System
Abstrak: Milk protein is the most valuable component and its stability is important during processing and storage. The stabilization is influenced by moisture and position of milk powder. It is assumed that lactose can acts as stabilizer of protein (protect from protein unfolding). The phenomenon of this stabilization was studied at three water activity (aw 0.23,0.54 and 0.75), with low concentration of lactose addition (5, 15 and 30%) during 6 weeks. Sample preparation'of MPC powders and equilibration at different relative humidity was conducted before storage. Analysis of MPC to investigate the influence of lactose in protein stabilization include solubility test, glass transition (Tg) by TMCT (Thermal Mechanical Compression Test), secondary protein structure (FTIR), and T2 relaxation (NMR) to measure the protein water interaction in MPC85 system. The role of lactose to retain the change of stability during storage can be observed clearly at aw 0.54. In this condition, the rate of solubility and Tg decreasing/week and also the rate of increasing of T2 short proportion/week can be retained by lactose adding. The capability of lactose to retain the rate of change of solubility, Tg and T2 short proportion cannot be observed at low water activity (aw 0.23) because of the small amount of water in the system. At aw 0.75, lactose adding c annot retain the change of stability due to very higher water content and lactose coystallization. Evidence from FTIR suggested that this reduction in solubility was not directly linked to major conformational changes within protein structures.
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