Judul: Pembuatan dan Pengujian Kontainer Semai Berbahan Organik pada Tanaman Sengon (Paraserianthes falcataria (L) Nielsen) di Rumah Kaca
Abstrak: Introduction. Organic Container Seedlings (OCS) is a container made from organic materials which serves as container seedling growth. OCS have advantages compared to polybags because in addition to functioning as a container seedling growth also environmentally friendly. This study tried to develop and test OCS added with natural tannin adhesive and tapioca their possibility for forest trees planting stock production in the green house. Materials and methods. This study used Completely Randomized Experimental design with 2 factors experiment, namely raw material composition and natural adhesive. The observed variables were shape and strength of container, seedling growth, seedling height, seed diameter, top root ratio and biomass plants. The data obtained were analyzed with F test (Analysis of Variance). If there was variable which showed significant difference between treatments, further test was performed with Duncan multiple range test. Results and Conclusions. According to results of Analysis of Variance, the interaction between raw material composition and natural adhesive had highly significant effect on sengon growth in greenhouse. Treatment given tannin adhesive has a best shape and strength of container with value indicators 96%. Factor of natural adhesive, raw material composition and interaction between them had highly significant effect on sengon growth. K3 treatment (Pulp+compos+tannin) has increase the sengon growth by 96,42% of the control. Tannin adhesives increase sengon growth by 33,42% of the control and composs media composition has increase the sengon growth by 31,96% of the control. The best adhesive is tannin which increase diameter growth by about 9,09% of the control. Factor of raw material composition has highly significant effect on top root ratio and biomass plant of sengon especially for m3 treatment (compos), it has 0,65 gram of biomass.
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Judul: Pembuatan dan pengujian kontainer semai berbahan organik pada tanaman sengon (Paraserianthes falcataria (L) Nielsen) di rumah kaca
Abstrak: Kontainer semai berbahan organik adalah suatu wadah semai yang berfungsi sebagai wadah pertumbuhan bibit tanaman yang dibuat dari bahan baku organik. Kontainer berbahan organik mempunyai nilai tambah dibandingkan dengan polybag karena selain media tumbuh tanaman juga ramah lingkungan. Penelitian ini mencoba untuk membuat kontainer semai berbahan dasar organik yang dicampur dengan perekat alami tapioka dan tanin sehingga dapat tahan di rumah kaca dan ramah lingkungan.
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Judul: Dynamical System of Hepatitis B in Three Groups with Vaccination
Abstrak: The aim of this study is to modify the hepatitis B transmission model in three age groups involving vaccination from the model conducted by Zhoe and Zhang.The method used is to analyze the stability of the fixed point and its basic reproduction number (R_0). Performed stability analysis and numerical simulation to see population dynamics. Next, a sensitivity analysis of the parameters was carried out to see its effect on R_0. From the analysis obtained two fixed points, namely non-endemic and endemic fixed points. Non-endemic fixed points are locally asymptotically stable if R_0 <1 Meanwhile, the endemic fixed point is locally asymptotically stable if R_0 > 1. Hepatitis vaccination affects the number of susceptible population, because the more successful the vaccination, the smaller the number of susceptible populations so that the smaller the population will be infected.
Keyword: Dynamic, Hepatitis B, Vaccine, Mathematical model