Judul: Valuation of ecological benefit of treescanopy and greenery open space of malang city using GIS techniques
Abstrak: Amenity and quality of urban environment influenced by the availability and existence of the urban tree canopy of the city. This study aims to identify, analyze, predictand valuatethe ecological benefits of tree’s canopyof Malang City, andprovide possible recommendations in order to increase the capacity of its urban ecosystem.This research uses descriptive quantitative method, include valuation ofecological benefits analysis of tree canopy and recommendation development analysis. Valuation is done by spatial analysis used GIS techniques by analyze trees canopy and non trees canopy cover to predict the ecosystem capacity. CITYgreen 5.4 extention is used to calculate and predict its benefit base on the extend of trees canopy cover.SWOT and QSPM (Quantitative Stratetig Planning Matrix) approach is usedto analyze and develop a possible recomendation for increasing ecosystem capacity of Malang City. Recommendations have been prepared based on results from both types of analysis. Research result shows, the greatest benefit is the capacity of stormwater control,and concluded that pollutants removal (31.8 tons/year, with the economic value of Rp. 1,552,356,000.00) and carbon absorbance (Carbon storage capacity of 435 tons and carbon sequestration capacity is 2460 pounds/year) are less significant impact in environmental capacity . Both of these capacities failed to give significant benefits due to the lack of quantity of trees canopy cover in the city of Malang (only 4% of total city). Value of ecological benefits of Malang city ecosystem currently provides Rp.26.330.985.000or 30.25% of total received of city revenue (Rp. 87,115,734,710). Basedon the results of the SWOT and QSPM analysis known that strategic priorities of capacity development is the restructuring of poor urban ecosystems and change the orientation of development policies into ecosystem-based and community based to fulfill national standard of greenery open space requirement for Indonesian city.
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Judul: Evaluasi Fungsi Ekologis Pohon pada Taman Kota di Malang
Abstrak: Taman kota berperan penting dalam meningkatkan nilai kualitas lingkungan perkotaan sehingga perlu dilakukan evaluasi fungsi ekologis pohon pada taman kota di Malang untuk mengetahui seberapa efektif penggunaan taman kota dalam memberikan fungsi ekologis. Tujuan dari penelitian ini adalah mengidentifikasi karakteristik lanskap, mengevaluasi fungsi ekologis pohon berupa penyerapan dan penyimpanan karbon serta penghasil oksigen, dan merekomendasikan spesies pohon yang efektif dalam menyediakan fungsi ekologis berbentuk daftar tabel spesies dan planting plant. Penelitian ini berlokasi di taman kota Malang yang memiliki vegetasi pohon serta luas >5000 m^2 yaitu Alun-Alun Merdeka, Taman Singha Merjosari, Taman Trunojoyo, dan Taman Slamet. Pengumpulan data dilakukan dengan cara melakukan pengukuran langsung 7 variabel pohon yaitu (diameter at breast high, total tinggi pohon, tinggi hingga pangkal tajuk, lebar tajuk, persen tajuk hilang, kesehatan tajuk, persen tajuk terkena paparan cahaya), observasi lapang, pencarian data sekunder, serta rujukan literatur. Pada penelitian ini, I-Tree Eco digunakan untuk menganalisis data. Berdasarkan hasil penelitian, keempat taman kota Malang mampu menyerap karbon sebesar 3,6593 ton per tahun, menyimpan karbon sebesar 312,6 ton, dan menghasilkan oksigen sebesar 9,7605 ton per tahun. Spesies pohon yang mampu menyerap karbon serta menghasilkan oksigen tinggi dari empat taman kota adalah Angsana (Pterocarpus indicus), Kerai Payung (Filicium decipiens), Sengon buto (Enterolobium cyclocarpum), sedangkan spesies pohon yang mampu menyimpan karbon dalam jumlah banyak adalah Beringin (Ficus benjamina), Trembesi (Albizia saman), dan Bodhi (Ficus religiosa). Penelitian ini memberikan referensi ilmiah mengenai spesies-spesies pohon yang efektif dalam memberikan fungsi ekologis menggunakan I-Tree Eco pada empat taman kota di Malang., City parks play an important role in improving the quality of the urban environment, so it is necessary to evaluate the ecological function of trees in the city parks in Malang to find out how effective the use of city parks is in providing ecological functions. The objective of this study was to identify landscape characteristics, evaluate the ecological functions of trees such as carbon absorption and storage and oxygen generation, and recommend tree species that are effective in providing ecological function in the form of species tables and planting plants. The research is located in Malang City Park, which has tree vegetation and an area of >5000 m2, namely Alun-Alun Merdeka, Singha Merjosari Park, Trunojoyo Park, and Slamet Park. Data collection is done by direct measurement of 7 tree variables, namely (diameter at breast high, total tree height, base height, crown width, crown percent missing, crown health, percentage of crown exposed to light), space observation, secondary data search, as well as literature reference. In this study, I-Tree Eco was used to analyze the data. According to the research, the four Malang city parks are capable of absorbing 3,6593 tons of carbon/year, storing 312,6 tons of carbon, and producing 9,7605 tons of oxygen/year. The species of trees that can absorb carbon and produce high oxygen from the four city parks are Angsana (Pterocarpus indicus), Kerai payung (Filicium decipiens), Sengon Buto (Enterolobium cyclocarpum), while the species that can store carbon in large quantities are Beringin (Ficus benjamina), Trembesi (Albizia saman), and Bodhi (Ficus religiosa). This research provides scientific reference to tree species that are effective in providing
Keyword: Evaluation, Ecological Functions, City Parks, I-Tree Eco

Judul: Perubahan Fase Padat pada Pembentukan Hidroksiapatit Akibat Suhu
Abstrak: Hidroksipatit [HAp, Ca10(PO4)6(OH)2] adalah salah satu bahan biomaterial yang dapat digunakan untuk implan tulang buatan karena memiliki komposisi yang sama dengan tulang manusia, bersifat bioaktif dan biokompatibilitas yang baik. HAp sintesis dengan menggunakan metode kering dan metode kering modifikasi sonikasi dari reaksi antara serbuk CaO hasil pemanasan cangkang kerang darah 1200 ºC selama 2.5 jam dan diamonium hidrogen fosfat (NH4)2HPO4 sebagai sumber fosfat. Difraktogram sampel menggunakan metode kering selama 2.5 jam pada suhu 400 ºC menghasilkan fase HAp, β-TCP, AKA, OKF, Ca(OH)2, dan CaO, pada suhu 600 dan 800 ºC terbentuk fase HAp, β-TCP, AKA, OKF, dan CaO, pada suhu 1000, 1200, dan 1250 ºC (serbuk dan pelet) terbentuk fase HAp dan β-TCP. Difraktogram sampel bersumber CaO cangkang kerang darah dan CaO komersial terbentuk fase HAp, β-TCP dan AKA. Metode kering-sonikasi (pelet) pada suhu 400 1250 serta 1250 ºC (serbuk) selama 3 jam menghasilkan fase HAp, β-TCP. Pada sampel 1250 ºC (serbuk) metode kering-sonikasi menunjukkan puncak tertinggi 2θ adalah hidroksiapatit dengan nilai 2θ 31,835º dan 32,918º, dan memperlihatkan morfologi permukaan yang lebih halus dan homogen berdasarkan mikroskopi payaran elektron.
Keyword: Cangkang kerang darah, Hidroksiapatit, Suhu