scholarly journals MICROBIAL TRANSFORMATION OF 2,5 DIHYDROXYCINNAMIC ACID BY ASPERGILLUS NIGER AND RHIZOPUS ORYZAE

2014 ◽  
Vol 49 (1) ◽  
pp. 104-116
Author(s):  
Mohammed Hosny
Keyword(s):  
Aspergillus Niger ◽  
Rhizopus Oryzae ◽  
Microbial Transformation

scholarly journals Inventarisasi Jamur Patogen Tular-Benih pada Lima Varietas Padi

2020 ◽  
Vol 3 (1) ◽  
pp. 1-15
Author(s):  
Sifa Sobianti ◽  
Loekas Soesanto ◽  
Suciati Hadi
Keyword(s):  
Aspergillus Niger ◽  
Rhizoctonia Solani ◽  
Aspergillus Flavus ◽  
Rhizopus Oryzae ◽  
Curvularia Lunata ◽  
Fusarium Semitectum

Penelitian ini bertujuan untuk mengetahui (1) beragam spesies jamur patogen tular-benih pada lima varietas padi, dan (2) persentase daya kecambah lima varietas padi. Penelitian dilaksanakan di Laboratorium Karantina Pertanian Kelas I Semarang, dari bulan Maret sampai dengan Mei 2019. Penelitian ini menggunakan Rancangan Acak Lengkap dengan 5 perlakuan dan 5 ulangan, perlakuan terdiri atas Varietas Inpago Unsoed 1, Inpago Unsoed Parimas, IR64, Ciherang, dan Situ Bagendit. Isolasi dan identifikasi jamur patogen tular-benih dilakukan pada blotter test dan medium PDA, dengan pengamatan di bawah mikroskop stereo dan kompon, kemudian dibandingkan dengan pustaka. Variabel yang diamati yaitu morfologi koloni patogen, morfologi patogen, dan daya kecambah. Hasil penelitian menunjukkan bahwa (1) pada semua varietas benih padi terdapat jamur patogen tular-benih, tetapi tidak semua jamur tersebut dijumpai pada setiap varietas. Jenis jamur patogen tular-benih yang dijumpai, yaitu Alternaria padwickii Ganguly, Aspergillus flavus Link, Aspergillus niger van Tieghem, Curvularia lunata (Wakker) Boedjin, Curvularia pallescens Boedjin, Drechslera oryzae Breda de Haan, Fusarium semitectum Berk. & Rav. [W&R, G,B,J], Rhizoctonia solani J. G. Kuhn, Rhizopus oryzae Went & Prins. Geerl., dan Tilletia barclayana Bref., dan (2) uji daya kecambah menunjukkan bahwa masing-masing varietas benih padi memilki persentase daya kecambah benih yang berbeda. Daya kecambah benih berturut-turut pada varietas IR64, Ciherang, Inpago Unsoed 1, Inpago Unsoed Parimas, dan Situ Bagendit sebesar 85,75, 81,75, 80,25, 76,5, dan 70%.

Cutaneous infection with Rhizopus oryzae and Aspergillus niger following bone marrow transplantation

1993 ◽  
Vol 25 (4) ◽  
pp. 293-296 ◽  
Author(s):  
A.S. Johnson ◽  
M. Ranson ◽  
J.H. Scarffe ◽  
G.R. Morgenstern ◽  
A.J. Shaw ◽  
...  
Keyword(s):  
Bone Marrow ◽  
Bone Marrow Transplantation ◽  
Aspergillus Niger ◽  
Marrow Transplantation ◽  
Rhizopus Oryzae ◽  
Cutaneous Infection

scholarly journals Aflatoxigenic and ochratoxigenic moulds and their toxins in tree nuts on Serbian market

2020 ◽  
pp. 9-18
Author(s):  
Irena Rakic ◽  
Gordana Dimic ◽  
Marija Skrinjar ◽  
Suncica Kocic-Tanackov
Keyword(s):  
Aspergillus Niger ◽  
Ochratoxin A ◽  
Immunosorbent Assay ◽  
Alternaria Alternata ◽  
Rhizopus Oryzae ◽  
Limit Of Detection ◽  
Average Concentration ◽  
Enzyme Linked Immunosorbent Assay ◽  
Mean Values ◽  
Tree Nuts

In this study, moulds and mycotoxins presence in different tree nuts were investigated. The results showed that all of the 25 samples were contaminated with moulds. Mean values of total mould count varied from 1-4.9 cfu per grain. The most frequent species in hazelnut samples were Rhizopus oryzae (32.2%) and Aspergillus niger (28.9%). In walnuts A. niger (75.6%), in cashews also A. niger (42.4%) while in pistachio samples Alternaria alternata (20.7%), and Cladosporium cladosporioides (20.7%) were the most dominant. Rhizopus oligosporus was the only identified species in all almond samples (100%). Using Enzyme Linked Immunosorbent Assay (ELISA), the presence of total aflatoxins and ochratoxin A was examinated. In all analyzed samples, levels of ochratoxin A were below the limit of detection. Total aflatoxins were detected only in walnut samples with average concentration of 7.1 ?g/kg.

Biotransformation of Glabratephrin, a Rare Type of Isoprenylated Flavonoids, by Aspergillus niger

2008 ◽  
Vol 63 (7-8) ◽  
pp. 561-564 ◽  
Author(s):  
Abou-El-Hamd H Mohamed ◽  
Ali K. Khalafallah ◽  
Afifi H. Yousof
Keyword(s):  
Aspergillus Niger ◽  
Ring Opening ◽  
Microbial Transformation ◽  
Membered Ring ◽  
Nmr Studies ◽  
Rare Type ◽  
Tephrosia Purpurea ◽  
Isolated Compound

Microbial transformation of glabratephrin, the major isolated compound from Tephrosia purpurea, afforded pseudosemiglabrin. The formation of the transformed compound seems to be performed via ring opening-closure of a five-membered ring causing transformation from a spiro into a fused system. The structure of the transformed compound was determined by comprehensive NMR studies, including DEPT, COSY, HMQC, NOE and MS.

scholarly journals Microbial Transformation of (-)-Nopol Benzyl Ether: Direct Dihydroxylation of Benzene Ring

2010 ◽  
Vol 5 (9) ◽  
pp. 1934578X1000500 ◽  
Author(s):  
Yoshiaki Noma ◽  
Yoshinori Asakawa
Keyword(s):  
Antioxidant Activity ◽  
Aspergillus Niger ◽  
Benzene Ring ◽  
Microbial Transformation ◽  
Benzyl Ether

The biotransformation of (-)-nopol benzyl ether (5) by Aspergillus Niger TBUYN-2 and A. niger Tiegh CBSYN was investigated. A. niger biotransformed 5 to afford (-)-4-oxonopol-2’,4’-dihydroxybenzyl ether (6), and (-)-4-oxonopol (7) as main products. Compound 6 showed strong antioxidant activity (IC50 30.2 μM), which was very similar to that of butyl hydroxyl anisol (BHA).

Microbial Transformation of Tetracyclic Diterpenes: Conversion of Ent-Kaurenones by Aspergillus niger

1986 ◽  
Vol 49 (1) ◽  
pp. 126-132 ◽  
Author(s):  
Andrés García-Granados ◽  
Antonio Martínez ◽  
M. Esther Onorato ◽  
Jose M. Arias
Keyword(s):  
Aspergillus Niger ◽  
Microbial Transformation

scholarly journals Microbial Transformations of 3-methoxyflavone by the Strains of Aspergillus niger

2014 ◽  
Vol 63 (1) ◽  
pp. 111-114 ◽  
Author(s):  
EDYTA KOSTRZEWA-SUSŁOW ◽  
MONIKA DYMARSKA ◽  
TOMASZ JANECZKO
Keyword(s):  
Aspergillus Niger ◽  
Filamentous Fungi ◽  
Wild Strain ◽  
Microbial Transformation ◽  
Microbial Transformations

Microbial transformation of 3-methoxyflavone into 3'-hydroxyflavon-3-yloxymethyl myristate was presented. Six filamentous fungi were used as biocatalysts: a wild strain of Aspergillus niger KB, its four UV mutants (A. niger MB, SBP, SBJ, 13/5) and the strain of Penicillium chermesinum 113. The highest yields were observed for the strains of A. niger KB and A. niger SBP (69.8% and 63.1%, respectively).

scholarly journals Peningkatan Kualitas Sargassum sp. sebagai Bahan Pakan Ikan Menggunakan Fermentasi Kapang

2019 ◽  
Author(s):  
Lusi Herawati Suryaningrum ◽  
Reza Samsudin
Keyword(s):  
Aspergillus Niger ◽  
Trichoderma Reesei ◽  
Rhizopus Oryzae ◽  
Rhizopus Oligosporus

Salah satu bahan baku lokal yang dapat dimanfaatkan sebagai bahan pakan ikan adalah rumput laut. Rumput laut Sargassum sp. mampu tumbuh dengan cepat sehingga terdapat dalam jumlah yang melimpah, tidak beracun dan memiliki kandungan nutrien yang cukup baik. Rumput laut Sargassum sp. mengandung protein 12,92%, lemak 2,18%, abu 14,48% dan karbohidrat 50,42%. Tingginya kadar serat kasar (20,01%) menjadi kendala yang harus diatasi. Tujuan dari penelitian ini adalah untuk meningkatkan kualitas rumput laut Sargassum sp. melalui fermentasi menggunakan kapang. Penelitian dilakukan menggunakan rancangan acak lengkap dengan lima perlakuan dan tiga ulangan, yaitu P0 (tepung Sargassum sp.), P1 (tepung Sargassum sp. + Aspergillus niger), P2 (tepung Sargassum sp. + Rhizopus oligosporus), P3 (tepung Sargassum sp. + Rhizopus oryzae) dan P4 (tepung Sargassum sp. + Trichoderma reesei). Inokulum yang ditambahkan masing-masing sebanyak 50 mL per 75 g tepung Sargassum sp. Inkubasi dilakukan selama tujuh hari di suhu ruang, dalam kondisi aerob. Data hasil penelitian menunjukkan bahwa kapang Aspergillus niger memiliki kemampuan lebih baik dalam meningkatkan nutrien dari Sargassum sp. Kadar protein meningkat sebesar 13,58 %; sedangkan serat kasar dan abu masing-masing turun sebesar 20,55% dan 18,57%.

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