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: Respon pertumbuhan dan anatomi jaringan daun Cyperus kyllingia, Eleusine indica, dan Rottboellia exaltata pada perbedaan tingkat pencemaran udara
Abstrak: Air pollution gives spesific effect on every living beings. Plant growth changes and modification of anatomy due to air pollution. Cyperus kyllingia, Eleusine indica, and Rottboellia exaltata placed in the unit garden of Babakan Sawah Baru Dramaga – Bogor (location 1) and greenhouse (location 2). The aims of this research were to know the response of plant growth and leaf tissue anatomy of Cyperus kyllingia, Eleusine indica, and Rottboellia exaltata against air pollutants. Observations parameter on relative plant growth including plant height increase, leaf number and plant weight were conducted during 90 days. Anatomical observations were carried out on paradermal section using whole mount method and tranversal section using paraffin method. Anatomical parameters included stomatal density, stomatal index and stomatal size, non glandular trichomes, leaf thickness, mesophyl, cuticle, epidermis, and vascular bundle sheath. The results show that pollutants in the research sites have not disrupt the process of plant growth but with some modifications. The modification of anatomy in C. kyllingia in adaksial cuticle thickness. Species E. indica anatomy modification in thickness of adaksial and abaksial cuticle. Anatomical modifications of R. exaltata were seen in thickness of leaf, thickness of bundle sheath, thickness of adaksial cuticle and thickness of abaksial cuticle.
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Judul: Construction of Strongly Optimal Binary Linear Code with Minimum Distance 9 and 11
Abstrak: A binary linear code of length n over q F is a subspace of n q F . A code has three parameters that attached to it, namely length, dimension, and minimum distance. A code with length n, dimension k and minimum distance d is often called [n, k, d ]-code. Usually, when two parameters are given, then we want to find a code that has the best value for the last parameter. Based on Gilbert- Varshamov bound, if a [n, k, d ]-code exists and can not be expanded, we call it a strongly optimal code. In this paper, we construct strongly optimal code with minimum distance 9 and 11. In constructing the code, we created a theorem and algorithm based on Gilbert-Varshamov bound before we implement the algorithm to MAPLE programming language. Because of computational limitations, the program can only construct up to k = 10 for d = 9 and k = 12 for d = 11.
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