Judul: Inhibitor Tirosinase Ekstrak Metanol Berbagai Bagian Pohon Jabon dan Mangium
Abstrak: Jabon and mangium are currently planted in community forest. The wastes resulted from the utilization of forest products can reach 75%, including leaves barks, and woods. One of the ways to increase value of those wastes can be done by utilizing the extractive compounds contained in wood waste as tyrosinase inhibitor. Parts of tree which were extracted consist of leaves, barks, sapwood, and heartwood. The extraction method used in this research was soxhletation using methanol for 12 hours. The yield of extracts was 0.89-13.02%, with the lowest yield from sapwood of mangium and the highest was resulted by jabon’s leaves. Mangium bark extract had the highest activity as inhibitors of tyrosinase, with the value of IC50 was 129.81 ppm for the monophenolase reaction or three times higher than kojic acid (38.45 ppm) and 240.88 ppm for the diphenolase reaction or two times higher than kojic acid (102.11 ppm). The compounds contained within mangium bark extracts were expected to be inhibitor of tyrosinase, which was classified to flavonoids.
Keyword: tyrosinase inhibitor, monophenolase, mangium, jabon, Diphenolase

Judul: Potensi Ekstrak Rhizophora sp. sebagai Inhibitor Tirosinase
Abstrak: Rhizophora sp. is one of plant type that has benefit as medicinal plants, for example, as whitening agent. The purpose of this study is to discover the parts and species of Rhizophora sp. which have best tyrosinase inhibitory activity. Leaves, stems, and roots of R. mucronata and R. stylosa were extracted with methanol and were tested their activities in order to obtain the best tyrosinase inhibitory activity. Based on the results, extracts of leaves, stems, and roots of R. mucronata from Tritih, Cilacap; Gebang, Cirebon; Eretan Kulon, Indramayu; Ujung Negoro Beach, Batang; Sigundu Beach, Batang; and Kapuk Beach, Jakarta were not potencial as tyrosinase inhibitor. Tyrosinase inhibitor activity from roots of R. mucronata from Samboja, East Kalimantan was higher than from its leaves and stems, especially for monophenolase with IC50 15.34 μg/ml. In perponderonce with, tyrosinase inhibitor activity from stems of R. stylosa from Samboja, East Kalimantan was also higher compared with stems of R. mucronata with IC50 38.02 μg/ml.
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Judul: Bisnis Fotografi Snapcash : Platform Digital.
Abstrak: Fotografi merupakan bagian gaya hidup masyarakat saat ini. Namun hingga saat ini belum ada platform digital yang menawarkan jasa fotografi. Ide bisnis Snapcash diciptakan sebagai solusi berupa platform digital yang dapat digunakan oleh fotografer untuk mencari pekerjaan dan konsumen untuk mencari jasa fotografi. Penelitian dilakukan untuk mengetahui permasalahan konsumen, menciptakan solusi yang tepat, dan merumuskan model bisnis yang sesuai untuk Snapcash. Metode yang digunakan adalah deskriptif kualitatif dengan pendekatan customer discovery. Pengumpulan data dilakukan secara non probability purposive sampling. Hasil pengujian masalah menunjukkan kesulitan fotografer dalam mendapatkan pelanggan dan kesulitan konsumen dalam menemukan fotografer yang sesuai kriteria. Solusi yang ditawarkan adalah aplikasi dan fitur yang ada didalamnya. Berdasarkan uji solusi yang dilakukan, solusi yang ditawarkan diterima oleh responden sehingga menjadi solusi bagi responden penelitian. Model bisnis Snapcash terverifikasi berdasarkan tiga aspek yaitu kesesuaian produk dengan pasar, segmen pelanggan dan cara mencapainya, serta cara perusahaan menghasilkan uang.
Keyword: customer discovery, fotografi, model bisnis, platform digital