Judul: Tumbuhan Gulma dari Famili Malvaceae di Dramaga Bogor
Abstrak: Famili Malvaceae mempunyai banyak jenis sebagai gulma, beberapa gulma Malvaceae dapat dimanfaatkan sebagai obat. Identifikasi tumbuhan, termasuk gulma harus dilakukan secara tepat karena berhubungan dengan penanganan dan pemanfaatan gulma. Penelitian ini bertujuan menyediakan data ciri morfologi vegetatif untuk mengidentifikasi tumbuhan gulma dari Malvaceae di Dramaga. Koleksi spesimen dilakukan di berbagai habitat terbuka di Dramaga, dan diamati morfologi generatif dan vegetatif. Kunci identifikasi untuk jenis-jenis yang ditemukan disusun berdasarkan ciri vegetatif. Empat jenis tumbuhan dari famili Malvaceae, yaitu Sida rhombifolia, Sida alnifolia, Malvastrum coromandelianum, dan Melochia corchorifolia ditemukan di Dramaga Bogor. Keempat jenis tumbuhan dapat dibedakan berdasarkan habitus, bentuk daun, tipe epidermis, dan trikoma daun. Jenis Melochia corchorifolia dicirikan dengan habitus herba, daun berbentuk segitiga sama kaki, dan dijumpai hanya trikoma non glandular bersel tunggal di pertulangan daun utama. Tiga jenis lainnya mempunyai habitus semak. Malvastrum coromandelianum dicirikan dari daun berbentuk bulat telur, memiliki trikoma bintang berlengan empat, dan sel epidermis bertipe Capsicum. Sida rhombifolia dan S. alnifolia memiliki trikoma tipe bintang dan glandular berbentuk perisai. Sida alnifolia dicirikan daun berbentuk obovate dan memiliki trikoma non glandular berbentuk tunggal, sedang S. rhombifolia memiliki bentuk daun rhombic dan elliptic, tanpa trikoma tipe non glandular bentuk tunggal.
Keyword: Malvaceae, Malvastrum, Melochia, Sida, gulma

Judul: Identifikasi Dan Karakterisasi Gulma-Gulma Ruderal Invasif Di Kebun Raya Bogor
Abstrak: Invasive weeds become important issues in Indonesia due to ecological and economical production concern of agriculture. Plant invation effected consequences of very high ecological loss and economical cost. Several thing of economic cost be able to quantification such as herbiside cost and yield loss. The ecological loss is the priceless disadvantages and difficult to quantified eg ecosystem damage, decrease recreation area, extinct of certain species etc. This research intent on identify and characterization of ruderal invasive weeds, looking for spreading pattern along with those influence factors to get the precisely controlling method and to know economic consequences from the existense of ruderal invasive weeds in Kebun Raya Bogor. This researh used scoring method and continued with multivariate analysis which showed by dendogram. The dendogram is made by neighbour joining single linkage method. The results showed that there are seven species invasive weeds from six familly which divided into three groups according to its aggresiveness. Component of Group 1 is Dioscorea bulbifera L. (Dioscoreaceae) with total score 69. Group 2 consist of Cissus sicyoides L. (Vitaceae) with total score 75, Cissus nodosa L. (Vitaceae) with total score 67 and Mikania micrantha H.B.K. (Asteraceae) with total score 78. Group 3 consist of Ficus elastica Roxb. (Moraceae) with total score 56, Paraserianthes falcataria (Fabaceae) with total score 48 and Cecropia adenopus (cecropiaceae) total skor 45. Component of Group 1 and Group 2 are woody climber those included in kind of vines whereas component of Group 3 are kind of tree. Based on our investigation invasive weed species which have score more than 50 be able to made significant disturbance and threaten the ecosystem stabillity of Bogor Botanical Garden.
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Judul: Electrophoretic Coating of Apatite Compouds on Stainless Steel 316L.
Abstrak: Stainless steel (SS) 316L is a metal which is used to bone plate. However, this metal still has low biocompatibility in a human body. The metal is coated by HAp in order to increase its biocompatibility. HAp on SS 316L is coated by electrophoretic deposition (EPD) method. We used two variables in EPD process, such as voltage and coating time to obtain the best coating. The XRD difractogram showed that SS 316L has been coated by HAp. Physical observation used by microscope optics showed that the best coating is achieved on 120V during 2 minutes.
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