Judul: Anatomi Jaringan Daun Dan Pertumbuhan Tanaman Celosia cristata, Catharanthus roseus, Dan Gomphrena globosa Pada Lingkungan Udara Tercemar
Abstrak: The presence of CO, NOx, SOx, O3, HC, Pb, and TSP (dust) at environment indicated air pollution. The plant of Celosia cristata, Catharanthus roseus, and Gomphrena globosa could be used to detect how bad the air pollution in the environment. The objective of this research were to analyze the anatomy of leaf tissue and plant development of Celosia cristata, Catharanthus roseus, and Gomphrena globosa due to air pollution. The plants were grown in the Block E Babakan garden unit of University Farm, Babakan Sawah Baru Dramaga – Bogor which closed to roadside and greenhouse Department of Biology FMIPA IPB which far away from roadside. The increasing plant height and leaf number were observed every 5 days, however, leaf size was every 10 days. Fresh and dry plant weighted after the end of 3 months. The stomatal index and density, glandular and non-glandular trichome, cuticular, leaf, epidermal, palisade parenchyma, spongy parenchyma of thickness were observed on paradermal section using whole mount, and transversal section using paraffin methods. Plant parameters showed higher value at location closed to roadside than in the greenhouse. Celosia cristata had anatomical modification: stomatal index and density increased (adaxial and abaxial) and showed bigger the leaf size. Catharanthus roseus leaves thicker due to anatomical changed (transversal section), fresh and dry plant roots weight increased. While the effect of air pollution on Gomphrena globosa showed higher stomatal index and density, glandular trichome at adaxial side, but no differences for their relative growth.
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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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