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Pertumbuhan Biji Palem Putri (Veitchia merilli (beec) h.f. moors) pada Berbagai Media Tumbuhan Nurul Sumiasri; Dody Priadi; Ink Kabinawa
Agrikultura Vol 21, No 1 (2010): April, 2010
Publisher : Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (649.239 KB) | DOI: 10.24198/agrikultura.v21i1.981

Abstract

Palem putri (Veitchia merillii (Beec) H.F.Moors) adalah tanaman hias penting di kota-kota sehingga studi perkecambahan biji untuk tujuan komersil perlu dilakukan.  Penelitian ini bertujuan untuk mengetahui perkecambahan dan pertumbuhan biji palem putri pada berbagai media tumbuh yang diberi zat pengatur tumbuh (ZPT). Penelitian di rumah kaca ini menguji empat jenis media tumbuh yaitu kompos, pasir,  Latosol dan Podsolik merah kuning (PMK). Hasil studi menunjukkan bahwa media terbaik untuk perkecambahan dan pertumbuhan bibit palem putri adalah  kompos. Media  pasir, tanah Latosol maupun Podsolik merah kuning tidak mendukung perkecambahan dan pertumbuhan bibit sebaik kompos.
THE EFFECT OF SEVERAL CONCENTRATIONS OF SAKAWA PLANT GROWTH REGULATOR ON SEED GERMINATION AND SEEDLING GROWTH OF LERAK (Sapindus rarak DC) ON COMPOST MEDIA Nurul Sumiasri; Dody Priadi; I.N.K. Kabinawa
Bioma : Jurnal Ilmiah Biologi Vol 1, No 1, April (2011): Bioma
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/bioma.v1i1, April.84

Abstract

Study of the effect of several concentrations of plant growth regulator (Sa-kawa) on seed germination and seedling growth of lerak (Sapindus rarak D.C ) on compost media was carried out in the Plant and Animal Germplasm Garden of Cibinong. The objective of this study was to know optimum concentration of plant growth regulator on growth of lerak This study was arranged by using randomized complete design (RCD) with 3 (three) replications. The treatments of concentrations variation of plant growth regulator i.e.?é?á 0 (control), 1, 2 and 3 ml/l were used. Each treatment consists of 5 samples (individuals).. The results showed that?é?á the good concentration to the growth parameter?é?á such as growth percentage, plant height, total leaves, root length and total root were 2 ml of Sakawa in?é?á 1ml/l (one liter of water). Keywords: sakawa plant growth regulator, growth, seedling, Sapindus rarak compost
Profil Kimia dan Aktivitas Antibakteri Fraksi Aktif Nannochloropsis sp. sebagai Senyawa Penghambat Bakteri Penyebab Gangguan Kesehatan Mulut Ni Wayan Sri Agustini; Dody Priadi; Raja Vin Atika
Jurnal Pascapanen dan Bioteknologi Kelautan dan Perikanan Vol 17, No 1 (2022): Juni 2022
Publisher : Balai Besar Riset Pengolahan Produk dan Bioteknologi Kelautan dan Perikanan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/jpbkp.v17i1.781

Abstract

AbstrakSalah satu penyebab masalah kesehatan mulut adalah bakteri. Mikroalga jenis Nannochloropsis sp. diketahui memiliki senyawa kimia yang dapat menghambat pertumbuhan bakteri seperti asam lemak dan fenol. Studi ini bertujuan untuk mengetahui potensi senyawa yang terkandung dalam Nannochloropsis sp. yang dapat menghambat pertumbuhan bakteri yang menyebabkan gangguan kesehatan mulut, dalam hal ini bau mulut dan plak gigi. Bakteri yang digunakan pada uji ini adalah Streptococcus mutans, Streptococcus sanguinis, dan Porphyromonas gingivalis. Selanjutnya profil kimia fraksi aktifnya dianalisis menggunakan kromatografi gas spektrometri massa (KG-SM). Biomassa Nannochloropsis sp. dimaserasi secara berturut-turut menggunakan pelarut n-heksana, etil asetat, dan etanol. Aktivitas antibakteri ekstrak diuji dengan metode difusi menggunakan kertas cakram. Selanjutnya, ekstrak etanol yang paling aktif difraksinasi menggunakan kolom silika G60 dengan pelarut n-heksana, etil asetat, dan etanol. Hasil fraksinasi (fraksi A dan B) kemudian diuji aktivitas antibakterinya. Fraksi A diketahui lebih aktif dibanding fraksi B, dengan diameter zona hambat fraksi A 15,5 mm (terhadap S. mutans); 16,8 mm (S. sanguinis) dan 16,1 mm (P. gingivalis) pada konsentrasi ekstrak 10 mg/mL dan dikatagorikan mempunyai respon hambatan pertumbuhan bakteri yang kuat. Hasil identifikasi fraksi A menggunakan KG-SM dibandingkan dengan spektra fragmentasi database WILEY 10N.14 dan diperoleh sepuluh senyawa dengan tingkat kemiripan ≥ 90%. Senyawa-senyawa tersebut diduga berperan dalam aktivitas antibakteri. Oleh karena itu, fraksi A dari ekstrak etanol Nannochloropsis sp. berpotensi sebagai bahan untuk formulasi obat kumur pencegah bau mulut dan plak gigi. AbstractOne of the causes of oral health problems is bacteria contamination. The microalgae of Nannochloropsis sp., contains chemical compounds that can inhibit bacterial growth, such as fatty acids and phenols. The objective of the study is to determine the potential compounds of Nannochloropsis sp., which can inhibit the growth of bacteria that cause bad breath (halitosis) and dental plaque. The bacteria used in this test were Streptococcus mutans, Streptococcus sanguinis, and Porphyromonas gingivalis. Futhermore, chemical profiles of the active fractions were determined using a gas chromatography-mass spectrometry (GC-MS). The biomass of Nannochloropsis sp. was macerated successively using n-hexane, ethyl acetate, and ethanol as solvents. The extract was tested for its antibacterial activity by diffusion method using disc paper. The most active ethanol extract was fractionated using a silica G60 column with n-hexane, ethyl acetate, and ethanol. The results of the fractionation (A and B fractions) were tested for their antibacterial activity. The A fraction was more active than the B fraction with the inhibition zone diameters of the A fraction were 15.5 mm (against S. mutans), 16.8 mm (S. sanguinis), and 16.1 mm (P. gingivalis) at extract concentration of 10 mg/mL and categorized as a strong bacterial growth inhibition response. The A fraction was identified using GC-MS and compared with the fragmentation spectra based on the WILEY 10N.14 database. The identification obtained ten compounds with > 90% similarity. These compounds were thought to play a role in the antibacterial activity. Therefore, the A fraction of ethanol extract from Nannochloropsis sp. can potentially be used in mouthwash formulation to prevent halitosis and dental plaque.
Evaluasi 36 Genotipe Padi Gogo Terhadap Cekaman Biotik Dan Abiotik Pada Enam Lokasi Berbeda: Evaluasi 36 Genotipe Padi Gogo Terhadap Cekaman Biotik Dan Abiotik Pada Enam Lokasi Berbeda Yashanti Berlinda Paradisa; Sri Indrayani; Heru Wibowo; Ambar Yuswi Perdani; Dody Priadi; Puspita Deswina; Eko Binnaryo Mei Adi; Enung Sri Mulyaningsih; Yuli Sulistyowati; Yuliana Galih Dyan Anggraheni; Fiqolbi Nuro
AGROSAINSTEK: Jurnal Ilmu dan Teknologi Pertanian Vol 6 No 1 (2022): AGROSAINSTEK: Jurnal Ilmu dan Teknologi Pertanian
Publisher : Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/agrosainstek.v6i1.286

Abstract

Biotic and abiotic stress during cultivation is one of the challenges in increasing upland rice production. Stress can be mild to severe, potentially reducing yield. Knowing the ability of plants to adapt to stressful environments from the start is essential information in the assembly of new high-yielding varieties. This study aims to determine stress in 36 upland rice lines and the adaptability of several upland rice lines to environmental stress. The genetic material used was 36 upland rice lines and two comparison varieties with four replications. The line is planted in Lampung, DI. Yogyakarta and East Java, two locations each. That area has different soil types and elevations. Data were analyzed descriptively and tabulated. In addition, the average scoring of biotic and abiotic stress for each location was calculated. The results showed that biotic stresses found in the plantations were Leaf Blast, Neck Blast, Bacterial Leaf Blight, Brown Spot, Red Striped, Rats, Birds, Rice Leaf Roller, and Stem Borer. Meanwhile, the abiotic stresses found were drought and salinity. From 36 tested lines, it showed that G26 was resistant to biotic stress caused by pests and diseases, G29 was drought-tolerant, and G6 was salinity tolerant.