Judul: Kombinasi Teknik Top Down dan Bottom Up dalam Pembuatan Nanokristalin Hidroksiapatit dari Batu Gamping.
Abstrak: The synthesis of nanocrystalline hydroxyapatite from limestone has been investigated by precipitation methode. The origin material of nanocystalline hydroxyapatite fabrication are ammonium hydrogen phosphate and calcinated limestone at 900 oC during 4 hours which produced calcium oxide (CaO). This research focuses on the influence of addition rate calcium solution and calcium precursor size. Various size of calcium precursor was prepared by milling CaO using HEM. From theParticle Size Analyzer (PSA) analysis result show that calsium before miling has a average size 45 μm and after milling 387.89 to 2,162.66 nanometers depending on the duration of milling time. Morphological analysis by SEM measurament shows that the particle of HAp are tightly agglomerated and globular in shape. The EDX analysis showed that the ratio of Ca/P hydroxyapatite which using calcium precursor from miling and without miling was 1.67 and 1.61, respectively. TEM images showed the crystal size distribution and morphology. Nanocrystalline hydroxyapatite formed has a size of length 10-150 nm and diameter 10-40 nm.
Keyword: precipitation., nanocrystalline, Limestone, hydroxyapatite, High Energy milling

Judul: Pemanfaatan cangkang kerang darah dalam Sintesis Nanohidroksiapatit
Abstrak: Research on the synthesis and characterization of nanohydroxyapatite, by using the source of calcium from the shells of mussles blood has been conducted. This research used ultrasonic waves through ultrasonication and precipitation methods for the shyntesis. Nanohydroxyapatite obtained was based on two treatmens which were CaO powder ultrasonication and hydroxyapatite powder ultrasonication. Ultrasonication process aims to minimize the spread and average particel size by using cavitation effect of ultrasonic waves propagating in a liquid medium. Ultrasonication in this research was counducted in three variation of time which were 30, 60 and 120 minutes with three replications for each treatment. The results of XRD characterization showed that for HA from CaO ultrasonication, appeared other phases whice are TCP and OCP. The result of optimum time for ultrasonication was 60 minutes. This is because at the time of ultrasonication 30 and 120 minutes, the distribution and average particle size were very large.
Keyword: XRD, ultrasonication, PSA, Hydroxyapatite

Judul: Ekologi merak hijau jawa (Pavo muticus muticus) Linnaeus 1758 pada beberapa tipe habitat di Ujung Timur Penyebarannya Jawa Timur, Indonesia
Abstrak: Merak hijau jawa merupakan salah satu jenis burung yang dilindungi.di Indonesia berdasarkan SK Mentan No 66/Kpts/Um/2/1973 dan Peraturan Pemerintah Republik Indonesia No 7 tahun 1999. Menurut ICBP (The International Council for Bird Preservation) merak hijau sebagai jenis burung yang tergolong terancam secara keseluruhan (globally threatened) baik populasi maupun habitatnya, sedangkan CITES mencantumkan merak hijau ke dalam Appendix II, merak hijau dari alam tidak bisa langsung diperdagangkan dan BirdLife International (2007) memasukkan golongan burung yang endangered. Tekanan terhadap populasi dan habitat merak hijau jawa sangat besar, sehingga kondisi populasinya menurun pada setiap penyebaran lokalnya, habitatnya terfragmentasi bahkan terisolasi. Tekanan terhadap populasi terutama karena perburuan liar. Namun demikian fakta menunjukan bahwa merak hijau jawa masih ada (exist), hal ini memberikan gambaran bahwa burung ini tentunya memiliki strategi ekologi tertentu untuk tetap bertahan hidup di alam pada berbagai tipe habitat.
Keyword: Pavo muticus muticus, Call count transect method, Pavo cristatus, Pavo muticus, Pavo muticus spicifer, Pavo muticus imperator, Pavo muticus muticus, Javan Green Peafowl, East Java