An Antibacterial Substance from the Leaves of Arbutus menziesii†

1952 ◽  
Vol 41 (10) ◽  
pp. 561-565 ◽  
Author(s):  
E. Roy Hammarlund ◽  
Derrol E. Pennington ◽  
L. Wait Rising
Keyword(s):  
Antibacterial Substance ◽  
Arbutus Menziesii

scholarly journals Two coastal Pacific evergreens, Arbutus menziesii, Pursh. and Quercus agrifolia, Née show little water stress during California's exceptional drought

PLoS ONE ◽  
2020 ◽  
Vol 15 (4) ◽  
pp. e0230868
Author(s):  
Alexander I. Chacon ◽  
Alexander Baer ◽  
James K. Wheeler ◽  
Jarmila Pittermann
Keyword(s):  
Water Stress ◽  
Quercus Agrifolia ◽  
Arbutus Menziesii

scholarly journals Antibacterial Substance Produced by B. natto. (Preliminary Report)

1949 ◽  
Vol 69 (6-10) ◽  
pp. 373-375 ◽  
Author(s):  
Morizo Ishidate ◽  
Shoji Shibata ◽  
Haruo Hagiwara
Keyword(s):  
Preliminary Report ◽  
Antibacterial Substance

scholarly journals SOLVENT FREE SYNTHESIS OF CHALCONE AS ANTIBACTERIAL SUBSTANCE

2017 ◽  
Vol 13 (1) ◽  
pp. 95
Author(s):  
Susy Yunita Prabawati ◽  
Arifah Khusnuryani ◽  
Khamidinal Khamidinal
Keyword(s):  
Antibacterial Activity ◽  
Solvent Free ◽  
Hydration Reaction ◽  
Antibacterial Substance ◽  
E Coli ◽  
H Nmr ◽  
Activity Test ◽  
Grinding Technique ◽  
Solvent Free Synthesis

<p>The aims of this study was to synthesize a compound of 3-methoxy-4-hydroxychalcone through Claisen-Schmidt condensation with grinding technique (solvent-free). Vanillin, acetophenone and 60 % NaOH catalyst used in this synthesis. Characterization of products was done with a spectrophotometer FTIR and <sup>1</sup>H-NMR spectrometer. The  product was obtained as a orange solid which has a melting point at    58 - 59 ˚C. Identification of the product by IR spectrophotometer showed the absorption of  C=C in the wavenumber of 1496.76 cm<sup>-1</sup> which confirmed that the hydration reaction of chalcone had occurred. Analysis using <sup>1</sup>H-NMR spectrometer also showed the proton of the CH=CH appearing on chemical shift (δ) 7.99 ppm. The antibacterial activity test showed that the compounds of 3-methoxy-4- hydroxychalcone has a potential as an antibacterial against bacteria <em>E. coli</em> and <em>B. subtilis</em>.</p>

scholarly journals STUDIES ON ^|^ldquo;MACRAMIN^|^rdquo;, A NEW HIGH-MOLECULAR ANTIBACTERIAL SUBSTANCE DERIVED FROM CHITIN*

1950 ◽  
Vol 3 (2) ◽  
pp. 119-123 ◽  
Author(s):  
SADAYOSHI HATTA ◽  
SHOGO KUWABARA ◽  
HARUO MIYAMOTO ◽  
KOSAKU AOYAMA ◽  
NORIHISA UTSUNOMIYA ◽  
...  
Keyword(s):  
Antibacterial Substance

A Study on the Antibacterial Property of the Extract from Apocynum Venetum

2011 ◽  
Vol 332-334 ◽  
pp. 164-167
Author(s):  
Zheng Li ◽  
Zhen Feng Dong ◽  
Jian Fei Zhang ◽  
Ji Xian Gong ◽  
Fan Jie Meng
Keyword(s):  
Escherichia Coli ◽  
Saccharomyces Cerevisiae ◽  
Staphylococcus Aureus ◽  
Aspergillus Niger ◽  
Antibacterial Effect ◽  
Antibacterial Property ◽  
Absolute Ethanol ◽  
Antibacterial Substance ◽  
Apocynum Venetum ◽  
Better Than

In order to determined the antibacterial property of Apocynum venetum. Three kinds of extractants (distilled water, 75% ethanol and absolute ethanol) were used to extract the leaf, stick and skin of Apocynum venetum, respectively. Flask and plate methods were used to evaluate the antibacterial property of these extracts on four kinds of classical microbiologies, Escherichia coli, Staphylococcus aureus, Saccharomyces cerevisiae and Aspergillus niger, respectively. The results showed that the antibacterial rate of extract by 75 % ethanol was better than extracts by water or absolute ethanol on Escherichia coli and skin contained more antibacterial substance (on Escherichia coli) than others. The antibacterial rate of extract by distill water was better than extracts by 75 % ethanol or absolute ethanol on Staphylococcus aureus and stick contained more antibacterial substance (on Staphylococcus aureus) than others. Some of extracts had very weak antibacterial rate on Saccharomyces cerevisiae and all extracts had not antibacterial effect on Aspergillus niger.

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