Judul: Respon pertumbuhan dan fisiologi tanaman Asystasia gangetica, Impatiens balsamina, dan Mirabilis jalapa pada tingkat polusi yang berbeda
Abstrak: Air pollution is an environmental issue that causes the changing and decreasing of air quality. The plants have different response to the aerial pollution. The purpose of this research was to analyze growth and physiological responses of Asystasia gangetica, Impatiens balsamina, and Mirabilis jalapa grown under different level of pollution in Bogor. The plants were grown in polybag and during 3 months they were exposed to different conditions: (1) with higher aerial pollution and (2) with lower aerial pollution. Growth responses observed in the experiment were the improvement of relative high, leaf number, leaf area, and the value of roots and shoot fresh weight, dry weight, and ratio of shoot/roots. Physiologycal responses observation was also analysed, including chlorophyll and ascorbic acid content. Different pollutant intentsity caused different in growth of Asystasia gangetica, Impatiens balsamina, and Mirabilis jalapa. The plants grown in higher pollution had lower chlorophyll and lower shoot/roots ratio as compared to those grown in lower pollution. Higher aerial pollution caused the plant underwent stress indicated by the increase of ascorbic acid content. The data showed that the plants were sensitive to the aerial pollution even though the pollutant content was still lower than below the standard threshold.
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Judul: Respon pertumbuhan dan anatomi jaringan daun pada Asystasia gangetica, Impatiens balsamina, dan Mirabilis jalapa akibat polusi udara
Abstrak: Air pollution is an environmental issue that occurs due to changes in air composition of its normal state. Plants potential as bioindicator of air pollution. Asystasia gangetica, Impatiens balsamina, and Mirabilis jalapa placed in the unit garden Babakan block E University Farm Babakan Sawah Baru Dramaga - Bogor (polluted) and greenhouse (control). Plant growth parameters were observed for 90 days such as the relative height, leaf number relative, relative leaf area and plant weight. Anatomical observations include paradermal section using whole-mount and transverse section using the paraffin method. Anatomical parameters include the number and size of stomata, glandular trichomes and non-glandular, leaf thickness, palisade parenchyma thickness, spongy parenchyma thickness, epidermis and cuticle thickness. The experimental design used was factorial design with two factors, namely the location and type of plants. All data were analyzed of variance and Duncan test using SAS program 9.1.3 Portable. Results showed that A. gangetica have the highest height and the largest relative number of leaves without anatomical changes. Impatiens balsamina modify itself by increasing the stomatal index and density of adaksial stomata as a response to air pollution. The increased of leaves thickness and spongy parenchyma is a response of M. jalapa to air pollution.
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Judul: Konstruksi aritmetika kurva eliptik F(2m) supersingular dan non-supersingular untuk skema kunci publik ElGamal
Abstrak: Algoritme ElGamal adalah salah satu algoritme kunci publik dengan aritmetik modular p yang mempunyai struktur grip siklik Z(p). Tingkat keanaman algoritme ini terletak pada pemecahan masalah logaritme diskret dari Z(p). Akan tetapi, tingkat keamanan tadi tahun ke tahun semakin menurun yang disebabkan kemampuan pemecahan algoritme diskret semakin meningkat. Untuk memenuhi tingkat keamanan yang memadai dibutuhkan p yang cukup besar yang menyebabkan proses enkripsi dan dekripsi menjadi lambat.
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