Systematics and biogeography of the rattan Calamus javensis complex (Arecaceae, Calamoideae) in Malesia

Calamus javensis is polymorphic. Morphometry and molecular approach resulted in all names used in the complex are regarded as synonyms of C. javensis except C. tenompokensis, which is retained as a distinct species. One variety is here recognized, C. javensis var. polyphyllus (including C. acuminatus)The Directorate General for Science and Technology and Higher Education (DGRSTHE) of the Republic of Indonesia Naturalis Biodiversity Center, Tropical Botany group, the Netherlands; Alberta Mennega Foundation, the Netherlands; Leiden University Fund (LUF), the Netherlands; Maatschappij voor Wetenschappelijk Onderzoek in de Tropen/ The Society for the Advancement of Research in the Tropics (Treub-Maatschappij)Plants of the Indopacific and Tropical Asia (PITA

Kemampuan Bakteri Pelarut Fosfat Isolat Asal Sei Garo dalam Penyediaan Fosfat Terlarut dan Serapannya pada Tanaman Kedelai

Bakteri pelarut fosfat dari tanah gambut asal Sei. Garo telah diuji potensinya padamedium Pikovskaya dan tanah PMK. Delapan isolat berhasil didapatkan, 3 diantaranya memilikikriteria tinggi melarutkan fosfat. Isolat dengan kriteria tinggi dan campurannya diuji potensinya dalampenyediaan fosfat pada medium Pikovskaya cair dan tanah PMK. Kemampuan tertinggi melarutkanfosfat pada medium Pikovskaya cair adalah isolat GGO1 (I1) yaitu 0,4736%. Secara keseluruhan adakecenderungan bahwa inokulum memiliki kemampuan dalam penyediaan fosfat pada tanah PMKnamun hasil menunjukkan tidak ada interaksi antara tanah dan inokulum terhadap kandungan fosfattersedia tanah dan serapannya pada tanaman. Perlakuan tanah tanpa sterilisasi berpengaruh nyataterhadap kandungan fosfat tersedia tanah

Analisis Fisiologi Bakteri Lignoselulolitik dan Aktinomisetes Selulolitik dan Ligninolitik dari Tanah Gambut Desa Rimbo Panjang Kabupaten Kampar sebagai Agen Biokompos

During a composting process, microorganisms such as bacteria, fungi, and actinomycetes have a role in degradation of organic matter. Temperature and pH also influence composting process. This research was aimed to obtain bacterial isolates and actinomycetes with the best ability to be applied as biocompost agent by analyzing the ability of those isolates to grow in different temperature and pH. Isolates of actinomycetes and bacteria were isolated from peatsoils in Rimbo Panjang, Kampar Regency, Riau. Bacterial isolates were inoculated into Nutrient Broth medium and actinomycetes isolates were inoculated into Starch Casein Broth medium. The cultures were incubated at room temperature (±27°C), 40°C, 50°C, 60°C, 70°C and 80°C in pH of 5 and pH of 7. The results showed that 3 isolates of bacteria and 90 actinomycetes isolates were able to grow at room temperature (±27°C) and 40°C in pH of 5 and pH of 7. A total of 28 actinomycetes isolates grew at 50°C in pH 5 and pH 7 with 2 isolates were considered as the most potential, which were Rhodococcus sp. and Streptomyces sp.

Uji Potensi Antifungi Aktinomisetes Selulolitik Dan Ligninolitik Dan Bakteri Lignoselulolitik Isolat Lokal Terhadap Pertumbuhan Jamur Ganoderma Boninense Dan Colletotrichum Capsici

Colletotrichum capsici fungi, causing agent of anthracnose in Chili, and Ganoderma boninense, fungi causing agent of basal stem rotten in oil palm, can reduce the productivity of Chili and oil palm. These disease are increasing so that it is necessary to find local biological agents that are environmentally friendly. The purpose of this research was to determine the potential isolates of lignocellulolyltic bacteria and cellulolytic and ligninolytic actinomycetes from peat soil of Rimbo Panjang Kampar, Riau as an antifungal agent to inhibit the growth of C. capsici and G. boninense.Antifungal activity was screened using agar disc method by measured the inhibition zone for seven days. The results showed that 13 isolates of actinomycetes haveantifungal activity against C. capsici with the highest inhibition zone 13,3 mm by RB2S40. Six isolates of actinomycetes have antifungal activity against G. boninense with the highest inhibition zone 29,15 mm by RB1S4. Five isolates have the ability to inhibit both fungi which were targeted

Seleksi Dan Uji Antibakteri Aktinomisetes Asal Tanah Gambut Rimbo Panjang Kampar Riau Terhadap Escherichia Coli Dan Salmonella Typhi

Actinomycetes is one of microorganisms that can be used as a natural antibiotic. Metabolites produced by actinomycetes have antagonistic activity on bacteria, therefore it can be used as antibacteria. The purposes of this study were to select and test the antibacterial activity of actinomycetes isolated from peat soil in Desa Rimbo Panjang Kabupaten Kampar Riau to inhibit the growth of Escherichia coliand Salmonella typhi. This study was conducted from December 2013-January2014 at the Microbiology Laboratory, University of Riau. Serial dilutions and pour plate method used for isolation of actinomycetes while agar disk method used for antibacterial test. The result found a total of 24 actinomycetes isolates, 10 isolates inhibiting E. coli, and 16 isolates inhibiting S. typhi. The inhibition zone diameter of E. coliand S. typhi were 8,3 to 16,9 mm and 7,8 to 12,9 mm, respectively

PERSONAL BRANDING FOOD VLOGGER MINANG AKUN INSTAGRAM @RICOSAPTAHADI DALAM MEMBENTUK GOOD PERSONAL REPUTATION

Food Vlogger semakin banyak bermunculan seiring dengan berkembangnya media di Indonesia, seperti halnya di Sumatra Barat. Sumatra Barat memiliki seorang Food Vlogger yang terkenal dan memiliki ciri khas yaitu Rico Saptahadi. Rico Saptahadi adalah seorang Food Vlogger yang memiliki Personal Branding yang baik bahkan tidak hanya di lingkup Sumatra Barat, melainkan di kalangan wisatawan yang berasal dari luar Sumatra Barat. Penelitian ini bertujuan untuk mendeskripsikan Personal Branding dari Rico Saptahadi dan juga mendeskripsikan hasil dari persuasif yang dilakukan oleh Rico Saptahadi. Penelitian ini dilakukan dengan metode penelitian kualitatif dengan pendekatan deskriptif. Peneliti mendeskripsikan pembentukan Personal Branding dari Rico Saptahadi melalui teori elemen Personal Branding dengan menggunakan Sembilan elemen Personal Branding. Hasil penelitian ini menunjukkan Rico Saptahadi memiliki ciri khas berupa konten yang dikemas menggunakan Bahasa Minang, penggunaan komunikasi verbal dan nonverbal yang seimbang dan natural dalam setiap konten, tempat-tempat baru yang selalu dihadirkan disetiap kontennya. Hal inilah yang menarik minat penonton untuk mencoba dan berkunjung ke lokasi kuliner yang direkomendasikan Rico Saptahadi. Persuasi yang dilakukan Rico Sapatahadi sangat beragam, mulai dari ajakan kepada followersnya untuk mengunjungi lokasi yang sama, hingga ajakan kepada followersnya untuk mengajak teman-teman mereka mengunjungi lokasi tersebut. Hasilnya lokasi kuliner yang direkomendasikan Rico Saptahadi mengalami kenaikan sebesar 30% dari penjualan sebelumnya. Hasil persuasi Rico Saptahadi juga terlihat dari dorongan para pengikutnya kepada pemilik usaha untuk membuka cabang di daerah yang belum ada cabang usaha tersebut