scholarly journals Acţiunea erbicidului Trifluralin asupra micromicetelor

2020 ◽  
Author(s):  
Cristina Moldovan ◽  
Keyword(s):  
Agar Medium ◽  
Subsequent Research ◽  
Czapek Medium

50 micromycete strains from NCNM were tested and cultivated on Czapek medium with 20% glucose in the presence of trifluralin in concentrations of: 50; 100 and 200 mg / l. It was found that all strains growth on all tested media regardless of the concentration of trifluralin supplemented in the agar medium. In order to better highlight the action of trifluralin on micromycetes in subsequent research, glucose was excluded from the Czapek medium and the dose of trifluralin was increased from 200 mg / l to 300 and 500 mg / l, so it was shown that out of 12 strains studied 6 no growth on glucose-free Czapek medium, and supplementation of this medium with trifluralin helps to stimulate their growth.

Reply to Miller and Asher's Critique

1983 ◽  
Vol 57 (3_suppl) ◽  
pp. 1124-1126 ◽  
Author(s):  
Richard S. Prawat
Keyword(s):  
Subsequent Research

Several points made by Millet and Asher in 1983 ate addressed. For instance, the probable effects of collinearity and suppression are discussed. The authors are confident that their original conclusions will be supported by subsequent research.

ANTIMICROBIAL ACTIVITIES OF METHANOL EXTRACT FROM UNIDENTIFIED SPONGE ASSOCIATED BACTERIA IN LEMUKUTAN ISLAND, KALIMANTAN BARAT

2009 ◽  
Vol 1 (2) ◽  
Author(s):  
Risa Nofiani ◽  
Siti Nurbetty ◽  
Ajuk Sapar
Keyword(s):  
Antimicrobial Activity ◽  
Bacillus Subtilis ◽  
Pathogenic Bacteria ◽  
Methanol Extract ◽  
Agar Medium ◽  
Antimicrobial Activities ◽  
Antimicrobial Compounds ◽  
Associated Bacteria ◽  
Minimum Inhibitory Concentrations ◽  
Sponge Associated Bacteria

<p>The increase of issues on the antibiotics resistant pathogenic bacteria has triggered high exploration for new antimicrobial compounds. One of the potential sources is sponge-associated bacteria. The aim of this study was to get sponge-associated bacteria extract containing antimicrobial activities. On the basis screening of antimicrobial activity using by streaking on agar medium, there were two potential isolates with antimicrobial activities namely LCS1 and LCS2. The two isolates were cultivated,then secondary metabolite product were extracted using methanol as a solvent. Minimum inhibitory concentrations (MICs) of extract LCS 1 were 1,000 μg/well for S. aureus, 950 μg/well for Salmonella sp.and 800 μg/well for Bacillus subtilis. Minimum inhibitory concentrations of extract LCS 2 were 500 μg/well for S. aureus, 1,050 μg/well for Salmonella sp., 750 μg/well for Bacillus subtilis, 350 μg/well for P. aeruginosa, 750 μg/sumur terhadap B. subtilis. Based on the MIC values, the two assay extracts have a relatively low antimicrobial activity.</p> <p>Keywords:Antimicrobial,Sponges associated bacteria,MICs</p>

Effects of Irridiance Levels during Flasking and Greenhouse Production on Growth and Flowering of the Phalaenopsis Orchid

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 537d-537
Author(s):  
Elise A. Konow ◽  
Yin-Tung Wang
Keyword(s):  
Malic Acid ◽  
Agar Medium ◽  
Fold Increase ◽  
Fresh Mass ◽  
Greenhouse Production

Four-month-old, aseptically raised Phalaenopsis Atien Kaala `TSC 22' seedlings 1.0 cm in leaf spread were transferred (Nov. 1995) 25 per polycarbonate box to an agar medium and placed under 10, 20, 40, or 80 mol·–2·s–1 PPF from cool-white fluorescent tubes. In June 1996, plants grown under 40 or 80 mol·–2·s–1 PPF had greater mass, wider leaves, and more roots than those under the two lower PPF. Plants were then transplanted and grown in a greenhouse (GH) under 340, 170, or 85 mol·–2·s–1maximum PPF. In May 1997, plants previously produced under 40 mol·–2·s–1 PPF had longer, wider, and thicker leaves than those under 10 mol·–2·s–1 PPF when grown under the two higher GH PPF. Under the low GH PPF, however, plants were equally small, regardless of the previous flasking PPF levels. Plants under the high, medium, and low GH PPF had an average of 61, 37, and 17 g of fresh mass, respectively. By September 1997, plants had increasingly larger leaves and higher concentrations of malic acid, sugars, and starch as GH PPF increased. Each doubling in GH PPF resulted in more than a two-fold increase in plant fresh mass. Under the low GH PPF, plants previously produced under 80 mol·–2·s–1 PPF during flasking were 13% larger than those under 10 mol·–2·s–1 PPF. Plants grown under the high, medium, and low GH PPF had 100%, 79%, and 0% flowering, respectively. Those under the high GH PPF bloomed earlier and had longer inflorescences, bearing many more and larger flowers, than those under the medium GH PPF.

Microbiological performance and salmonella dynamics in a wastewater depuration pond system of southeastern spain

1995 ◽  
Vol 31 (12) ◽  
pp. 239-248 ◽  
Author(s):  
Ana Emparanza-Knörr ◽  
Francisco Torrella
Keyword(s):  
Fecal Coliform ◽  
No Reduction ◽  
Agar Medium ◽  
Microbiological Quality ◽  
Total Coliform ◽  
Fecal Coliforms ◽  
Selective Media ◽  
E Coli ◽  
The Village ◽  
Final Effluent

The Salmonella presence and the microbiological quality indicators, total and fecal coliforms and coliphages of E. coli C, have been studied in a overloaded wastewater lagoon system treating urban wastewatrers of the village of Guardamar del Segura (Alicante, Spain). Classical microbiological technology to detect salmonellae was used, including pre-enrichment, enrichment, selective media plating and biochemical and serological confirmation. Water was physicochemically characterized according to COD, SS, temperature, pH and dissolved oxygen. The selective migration step through Rappaport-Vassiliadis semisolid agar medium was essential for the consistent detection of Salmonella in the different lagoon effluents. Total and fecal coliform levels of up to 105-106 MPN/100 ml were detected in the final effluent. High coliphage concentrations of 103-104 pfu/ml were also found in the effluent waters. Salmonella was always detected in 100 ml samples and eventually reached an order of value of 103 MPN/100 ml. Total coliform reduction was higher in the anaerobic ponds whereas fecal coliforms were more efficiently eliminated in the facultative (mostly “anoxic”) lagoons. Coliphage reduction was higher in the facultative lagoons when compared to the anaerobic ponds. On many occasions, no reduction or eventual increment of the concentration of salmonellae was detected in the effluents from the anaerobic ponds compared to concentrations of the patohogen in the influent raw wasterwaters. The possibility exists for a capacity of Salmonella to multiply in the anoxic phase of the wastewater treatment, but the presence of microorganisms in raw sewage waters which could maskSalmonella detection with the enrichment methodology employed cannot be ruled out.

scholarly journals Xylose-Lysine-Tergitol 4: An Improved Selective Agar Medium for the Isolation of Salmonella

1991 ◽  
Vol 70 (12) ◽  
pp. 2429-2432 ◽  
Author(s):  
RUSSELL G. MILLER ◽  
C.R. TATE ◽  
E.T. MALLINSON ◽  
J.A. SCHERRER
Keyword(s):  
Agar Medium ◽  
Selective Agar

Symptoms as Black Boxes: Time to Look Inside the Box

2021 ◽  
pp. 216770262198972
Author(s):  
Carolyn E. Wilshire ◽  
Tony Ward ◽  
Samuel Clack
Keyword(s):  
Black Box ◽  
Classification Systems ◽  
Subsequent Research ◽  
Black Boxes ◽  
Core Questions

In our original article (this issue, p. ♦♦♦), we argued that focusing research on individual symptoms of psychopathology might provide valuable information about their underlying nature and result in better classification systems, explanations, and treatment. To this end, we formulated five core questions that were intended to guide subsequent research and symptom conceptualizations in the psychopathology domain. In this article, we respond to two commentaries on our article. We conclude that it is time to open the black box of symptoms and to take seriously their status as complex constructs.

Evaluation of S. aureus ID, a Chromogenic Agar Medium for the Detection of Staphylococcus aureus

Infection ◽  
2006 ◽  
Vol 34 (2) ◽  
pp. 95-97 ◽  
Author(s):  
B. M. W. Diederen ◽  
C. M. van Leest ◽  
I. van Duijn ◽  
P. Willemse ◽  
P. H. J. van Keulen ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Agar Medium ◽  
Chromogenic Agar

A modified tube method for the cultivation and enumeration of anaerobic bacteria

1979 ◽  
Vol 25 (9) ◽  
pp. 987-990 ◽  
Author(s):  
James E. Ogg ◽  
Sun Y. Lee ◽  
Betty J. Ogg
Keyword(s):  
Agar Medium ◽  
Anaerobic Bacteria ◽  
Bacteroides Fragilis ◽  
Fusobacterium Necrophorum ◽  
Reducing Agent ◽  
Thin Cylinder ◽  
Head Space ◽  
New Type ◽  
Inoculation Procedure

A new type of tube (the Lee tube) has been developed for use in the cultivation and enumeration of obligate anaerobes. The Lee tube is a double-walled, screw-capped tube which allows the formation of a thin cylinder of agar medium between the two walls. Anaerobiosis is achieved through deoxygenation of the deep cylinder of agar during sterilization, a minimum of head space, and use of a reducing agent to absorb oxygen introduced during the inoculation procedure. For several species of Clostridium, Bacteroides fragilis, Fusobacterium necrophorum, Veillonella alcalescens, and Pectinatus cerevisiiphilus, colony counts of cultures in the Lee tubes were comparable with those obtained in pour plates incubated in a BBL GasPak system and in anaerobic roll tubes.

Sign in / Sign up

Export Citation Format

Share Document