Weed Identification and Potential under the Stands o Superior Teak Nusantara (JUN) in Experiment Garden of Universityof Nusa Bangsa, Cogreg, Bogor Weed is a plant that the presence is not desirable because it can reduce the results achieved by the plant production. Weeds is an important component in forest ecosystems that must be taken their role. Composition and diversity of weed will determine the forest structure that will ultimately affect the ecological function of the forest. The presence and diversity of weeds under JUN stands in the area of Nusa Bangsa University experimental garden in Cogreg areas need to be studied and identifie for its potential to be used and prevention as well. The method of analysis used in this study was the least squares method of 0,5 m x 0,5 m and made 10 sample plots under the stand of JUN. Weeds were identified by using the description book based on morphological characteristics, the type, amount and its potential as a medical plant. The results showed that there were 15 types of weeds under JUN stands, namely Oxalis barrelieri, Phyllanthus niruri, Nephrolepis biserata, Ageratum conyzoides, Borreria latifolia, Molineria longiflora, Murdanium nudiflora, Synedrella nodiflora, Acalypha indica L, Echinochloa crus – galli (L.) P. beauv, Commelina diffusa Burm, Asystasia sp. and Clibadium surinamense. Among all the types of weeds, Borreria latifolia were dominant.Keywords : Teak Superior Archipelago (JUN), weeds, identification, medicinal plants ABSTRAK Gulma merupakan tumbuhan yang kehadirannya tidak diinginkan karena dapat menurunkan hasil yang dicapai oleh tanaman produksi. Gulma merupakan komponen penting dalam ekosistem hutan yang harus diperhitungkan perannya. Komposisi dan keanekaragaman gulma ikut menentukan struktur hutan yang pada akhirnya akan berpengaruh pada fungsi ekologis hutan. Kehadiran dan keanekaragaman gulma di bawah tegakan JUN di areal kebun percobaan Universitas Nusa Bangsa di daerah Cogreg perlu dipelajari dan diidentifikasi untuk dimanfaatkan potensinya maupun untuk penanggulangan gulma. Metode analisis yang digunakan dalam penelitian ini adalah dengan metode kuadrat 0,5m x 0,5m dan dibuat 10 petak contoh di bawah tegakan JUN. Gulma diidentifikasi dengan menggunakan buku deskripsi berdasarkan ciri morfologi, jenis, jumlah serta potensinya sebagai tumbuhan obat. Hasil penelitian menunjukkan bahwa terdapat 15 jenis gulma di bawah tegakan JUN, yaitu Oxalis barrelieri, Phyllanthus niruri, Nephrolepis biserata, Ageratum conyzoides, Borreria latifolia, Molineria longiflora, Murdanium nudiflora, Synedrella nodiflora, Acalypha indica L, Echinochloa crus-galli (L.) P. Beauv, Commelina diffusa Burm, Asystasia,sp,dan Clibadium surinamense. Diantara semua jenis gulma tersebut, yang mendominasi adalah Borreria latifolia.Kata Kunci: Jati Unggul Nusantara (JUN), gulma, identifikasi, tanaman obat
Antibacterial Extract of Mangosteen (Garcinia mangostana L.)Fruit Shell The skin of the mangosteen fruit is extracted with n-hexane and ethyl acetate to determine the Minimum Inhibitory Concentration (MIC) against Staphylococcus aureus ATCC 25923 and Pseudomonas aeruginosa ATCC 27 853. Results showed that n-hexane extract gave inhibition zone larger than the ethyl acetate extract on all concentrations . Extract n-hexane has a value of MIC against S. aureus ATCC bacterial test 25923 62.5 mg / ml while the ethyl acetate extract of 125 mg / ml . N- hexane extracts had MIC values of the test bacteria P.aeuroginosa ATCC 27 853 was 125 mg / ml , and while the ethyl acetate extract had a MIC value of 500 mg / ml . Treatment of solvent, concentration and interaction between the solvent and concentration significantly affected the test bacteria ATCC 25923 S. aureus at the level of 5 %, the highest interaction N-Hexane solvent with a concentration of 15,625 mg / ml and was not significantly different interactions with the concentration of 31.25 mg/ml and 125 mg/ml. Treatment solvent and concentration significantly while the interaction between the solvent and the concentration has no effect on the test bacteria P.aeuroginosa ATCC 27 853 at 5% level .Keywords: Garcinia mangostana L., Staphylococcus aureus and Pseudomonas aeruginosa ABSTRAK Kulit buah manggis diekstrak dengan n-heksan dan etil asetat untuk mengetahui Konsentrasi Hambat Minimum (KHTM) terhadap bakteri Staphylococcus aureus ATCC 25923 dan Pseudomonas aeruginosa ATCC 27853. Hasil penelitian menunjukkan bahwa ekstrak n-heksana memberikan zona hambatan lebih besar dibandingkan dengan ekstrak etil asetat pada semua konsentrasi. Ekstrak n-heksana memiliki nilai kadar hambat minimal (KHM) terhadap bakteri uji S. aureus ATCC 25923 62,5 mg/ml sedangkan ekstrak etil asetat 125 mg/ml. Ekstrak n-heksana memiliki nilai KHM terhadap bakteri uji P.aeuroginosa ATCC 27853 adalah 125 mg/ml dan sedangkan ekstrak etil asetat memiliki nilai KHM 500 mg/ml. Perlakuan pelarut, konsentrasi dan interaksi antara pelarut dan konsentrasi berpengaruh nyata terhadap bakteri uji S. aureus ATCC 25923 pada taraf 5%, interaksi tertinggi yaitu pelarut N-Heksan dengan konsentrasi 15,625mg/ml dan interaksi ini tidak berbeda nyata dengan konsentrasi 31,25 mg/ml dan 125 mg/ml. Perlakuan pelarut dan konsentrasi berpengaruh nyata sedangkan interaksi antara pelarut dan konsentrasi tidak berpengaruh terhadap bakteri uji P.aeuroginosa ATCC 27853 pada taraf 5%. Kata kunci: Garcinia mangostana L., Staphylococcus aureus dan Pseudomonas aeruginosa
Momordica charantia L. commonly known as bitter melon plant, is widely used as a treatment for various diseases, including skin infections. The purpose of this study was to determine the highest concentration of bitter melon extract and infusion in inhibiting the growth of Staphylococcus aureus bacteria. This research was conducted using the disc diffusion method and evaluation of the quality of the clay mask was carried out on the growth of Staphylococcus aureus bacteria. The results showed that 96 % ethanol extract of bitter melon at a concentration of 100% had an inhibitory effectiveness of 6.32 mm and was higher than that of 4.85 mm of bitter melon infusion. The clay mask formula of 96% ethanol extract of bitter melon with concentrations of 5 % (F1), 7.5 % (F2) and 10 % (F3) gave a fairly good evaluation of physical quality with an inhibition zone of 5.0 mm; 7.06 mm and 7.30 mm, respectively. The clay mask of 96% ethanol extract of bitter melon fruit F1, F2 and F3 belongs to the medium category in inhibiting bacteria.keywords: inhibition; ethanol extract; clay mask; Momordica charantia L.; Staphylococcus aureusABSTRAKDaya Hambat Masker Clay Ekstrak Etanol 96% Buah Pare (Momordica charantia L.) terhadap Bakteri Staphylococcus aureusMomordica charantia L. umumnya dikenal dengan tanaman pare, digunakan sebagai pengobatan terhadap berbagai penyakit, diantaranya infeksi pada kulit. Penelitian ini bertujuan untuk mengetahui konsentrasi tertinggi ekstrak dan infusa buah pare dalam menghambat pertumbuhan bakteri Staphylococcus aureus. Penelitian ini dilakukan menggunakan metode difusi cakram dan evaluasi mutu masker clay dilakukan terhadap pertumbuhan bakteri Staphylococcus aureus. Hasil penelitian menunjukkan bahwa ekstrak etanol 96 % buah pare pada konsentrasi 100 % memiliki efektivitas daya hambat sebesar 6,32 mm dan lebih tinggi dibandingkan dengan infusa buah pare 4,85 mm. Formula masker clay ekstrak etanol 96 % buah pare konsentrasi 5 % (F1) ; 7,5 % ; (F2) dan 10 % (F3) memberikan hasil evaluasi mutu fisik yang cukup baik dengan zona hambat berturut-turut 5,0 mm ; 7,06 mm dan 7,30 mm. Masker clay ekstrak etanol 96% buah pare F1, F2 dan F3 termasuk ke dalam kategori sedang dalam menghambat bakteri.Kata kunci: daya hambat; ekstrak etanol; masker clay; Momordica charantia L.; Staphylococcus aureus
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