Preparation of polymersomes in pure water for facile antibacterial applications

RSC Advances ◽  
2015 ◽  
Vol 5 (68) ◽  
pp. 55602-55607 ◽  
Author(s):  
Tao Wang ◽  
Jinhui Jiang ◽  
Yufen Xiao ◽  
Yijie Zou ◽  
Jingyi Gao ◽  
...  
Keyword(s):  
Pure Water ◽  
Antibacterial Activities ◽  
Gram Negative Bacteria ◽  
Facile Synthesis ◽  
Gram Positive ◽  
Gram Negative ◽  
Bacterial Attack

We report the facile synthesis of antibacterial polymersomes in pure water, which show good antibacterial activities against both Gram-positive and Gram-negative bacteria and can be sprayed in places which are susceptible to bacterial attack.

scholarly journals In Vitro and In Vivo Antibacterial Activities of DW-224a, a New Fluoronaphthyridone

2006 ◽  
Vol 50 (6) ◽  
pp. 2261-2264 ◽  
Author(s):  
Hee-Soo Park ◽  
Hyun-Joo Kim ◽  
Min-Jung Seol ◽  
Dong-Rack Choi ◽  
Eung-Chil Choi ◽  
...  
Keyword(s):  
Antibacterial Activities ◽  
The Other ◽  
Vitro Activity ◽  
Gram Negative Bacteria ◽  
In Vitro Activity ◽  
Gram Positive ◽  
Gram Negative ◽  
Gram Positive Bacteria

ABSTRACT DW-224a showed the most potent in vitro activity among the quinolone compounds tested against clinical isolates of gram-positive bacteria. Against gram-negative bacteria, DW-224a was slightly less active than the other fluoroquinolones. The in vivo activities of DW-224a against gram-positive bacteria were more potent than those of other quinolones.

scholarly journals Antibacterial Compounds from Glycosmis puberula Twigs

2014 ◽  
Vol 9 (12) ◽  
pp. 1934578X1400901
Author(s):  
Cholpisut Tantapakul ◽  
Tawanun Sripisut ◽  
Wisanu Maneerat ◽  
Thunwadee Ritthiwigrom ◽  
Surat Laphookhieo
Keyword(s):  
Antibacterial Activities ◽  
Gram Negative Bacteria ◽  
Isolation And Identification ◽  
Gram Positive ◽  
Antibacterial Compounds ◽  
Gram Negative ◽  
Spectroscopic Analyses ◽  
Phytochemical Investigation ◽  
Reported Data

The first phytochemical investigation of Glycosmis puberula twigs led to the isolation and identification of a new quinolone alkaloid, glycosmispuberulone (1), along with ten known compounds (2–11). The structures were elucidated by spectroscopic analyses and comparison with previously reported data. Their antibacterial activities against Gram-positive and Gram-negative bacteria were also evaluated.

Biogenic Gold Nanoparticles and its Antibacterial Activities: Houttuynia Cordata Leaf Extract

2014 ◽  
Vol 1051 ◽  
pp. 392-397
Author(s):  
T.V.M. Sreekanth ◽  
In Yong Eom
Keyword(s):  
Gold Nanoparticles ◽  
Leaf Extract ◽  
Antibacterial Activities ◽  
Gram Negative Bacteria ◽  
Gram Positive ◽  
Houttuynia Cordata ◽  
Gram Negative ◽  
Gram Positive Bacteria ◽  
Visible Spectra ◽  
Uv Visible

Gold nanoparticles (AuNPs) can be prepared in a number of chemical techniques, which are not environmentally friendly. Biosynthesis of nanoparticles by plant extracts is currently under exploitation. In this work, we describe an eco-friendly technique for green synthesis of AuNPs from AuCl4 solution using the Houttuynia cordata leaf extract as reducing agent. The AuNPs were characterized using UV-Visible spectroscopy, SEM, TEM, FTIR and AFM. The UV-Visible spectra indicate a strong plasma resonance that is located at 535 nm. The antibacterial activity of AuNPs was performed on various gram positive and gram negative bacteria. The AuNPs showed more inhibitory activity on gram negative than gram positive bacteria.

Synthesis of silver nanoparticles colloids in imidazolium halide ionic liquids and their antibacterial activities for gram-positive and gram-negative bacteria

Chemosphere ◽  
2020 ◽  
Vol 243 ◽  
pp. 125302 ◽  
Author(s):  
Virendra Patil ◽  
Swapnil Mahajan ◽  
Mohan Kulkarni ◽  
Kashinath Patil ◽  
Chandrashekhar Rode ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Ionic Liquids ◽  
Antibacterial Activities ◽  
Gram Negative Bacteria ◽  
Gram Positive ◽  
Gram Negative

The Effects of Natural Dopant Acids on Morphologies and Antibacterial Activity of Polyaniline

2013 ◽  
Vol 650 ◽  
pp. 249-252 ◽  
Author(s):  
Jia Li Mu ◽  
Wen Jun Fan ◽  
Shao Yun Shan ◽  
Ting Wei Hu ◽  
Ya Ming Wang ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Salicylic Acid ◽  
Citric Acid ◽  
Rosin Acid ◽  
Antibacterial Activities ◽  
Gram Negative Bacteria ◽  
Gram Positive ◽  
Gram Negative ◽  
Gram Positive Bacteria ◽  
Bacillus Coli

Polyaniline(PANI) doped by natural acid(citric acid, salicylic acid or rosin acid)solutions was synthesized using aniline as monomer and ammonium peroxydisulfate ((NH4)2S2O8) as oxidant. The antibacterial activities of the PANI against Gram positive bacteria(Bacillus megatherium, Bacillus subtilis, Bacillus cereus and Staphylo-coccus aureus) and Gram negative bacteria(Bacillus coli) were investigated. It was shown that PANI doped by citric acid possessed the better antibacterial activity against the selected species of Gram positive bacteria and Gram negative bacteria than PANI doped by rosin acid. PANI doped by salicylic acid exhibited ascendant antibacterial activities against Gram positive bacteria, but it has little antibacterial activity against the Gram negative bacteria.

scholarly journals Characteristics of Two Crustins from Alvinocaris longirostris in Hydrothermal Vents

Marine Drugs ◽  
2021 ◽  
Vol 19 (11) ◽  
pp. 600
Author(s):  
Lu-Lu Guo ◽  
Shao-Lu Wang ◽  
Fang-Chao Zhu ◽  
Feng Xue ◽  
Li-Sheng He
Keyword(s):  
Hydrothermal Vents ◽  
Room Temperature ◽  
Amino Acid Level ◽  
Antibacterial Activities ◽  
Gram Negative Bacteria ◽  
Drug Resistant ◽  
Gram Positive ◽  
Gram Negative ◽  
Gram Positive Bacteria ◽  
Antibacterial Spectrum

Crustins are widely distributed among different crustacean groups. They are characterized by a whey acidic protein (WAP) domain, and most examined Crustins show activity against Gram-positive bacteria. This study reports two Crustins, Al-crus 3 and Al-crus 7, from hydrothermal vent shrimp, Alvinocaris longirostris. Al-crus 3 and Al-crus 7 belong to Crustin Type IIa, with a similarity of about 51% at amino acid level. Antibacterial assays showed that Al-crus 3 mainly displayed activity against Gram-positive bacteria with MIC50 values of 10–25 μM. However, Al-crus 7 not only displayed activity against Gram-positive bacteria but also against Gram-negative bacteria Imipenem-resistant Acinetobacter baumannii, in a sensitive manner. Notably, in the effective antibacterial spectrum, Methicillin-sensitive Staphylococcus aureus, Escherichia coli (ESBLs) and Imipenem-resistant A. baumannii were drug-resistant pathogens. Narrowing down the sequence to the WAP domain, Al-crusWAP 3 and Al-crusWAP 7 demonstrated antibacterial activities but were weak. Additionally, the effects on bacteria did not significantly change after they were maintained at room temperature for 48 h. This indicated that Al-crus 3 and Al-crus 7 were relatively stable and convenient for transportation. Altogether, this study reported two new Crustins with specific characteristics. In particular, Al-crus 7 inhibited Gram-negative imipenem-resistant A. baumannii.

Facile synthesis of silver nanoparticles deposited on a calcium silicate hydrate composite as an efficient bactericidal agent

RSC Advances ◽  
2016 ◽  
Vol 6 (114) ◽  
pp. 112931-112938 ◽  
Author(s):  
Wei Jiao
Keyword(s):  
Silver Nanoparticles ◽  
Calcium Silicate ◽  
Calcium Silicate Hydrate ◽  
Antibacterial Activities ◽  
Facile Synthesis ◽  
Gram Positive ◽  
Gram Negative ◽  
Gram Positive Bacteria ◽  
Bactericidal Agent

Silver nanoparticles deposited calcium silicate hydrate composite was synthesized and demonstrated high antibacterial activities against Gram-negative and Gram-positive bacteria.

scholarly journals Antibacterial activity of cobalt(II) complexes with some benzimidazole derivatives

2008 ◽  
Vol 73 (12) ◽  
pp. 1153-1160 ◽  
Author(s):  
S.O. Podunavac-Kuzmanovic ◽  
V.M. Leovac ◽  
D.D. Cvetkovic
Keyword(s):  
Antibacterial Activity ◽  
Chemical Structure ◽  
Antibacterial Activities ◽  
Benzimidazole Derivatives ◽  
Wall Structure ◽  
Gram Negative Bacteria ◽  
Bacterial Strains ◽  
Gram Positive ◽  
Gram Negative

The antibacterial activities of cobalt(II) complexes with two series of benzimidazoles were evaluated in vitro against three Gram-positive bacterial strains (Bacillus cereus, Staphylococcus aureus, and Sarcina lutea) and one Gram-negative isolate (Pseudomonas aeruginosa). The minimum inhibitory concentration was determined for all the complexes. The majority of the investtigated complexes displayed in vitro inhibitory activity against very persistent bacteria. They were found to be more active against Gram-positive than Gram-negative bacteria. It may be concluded that the antibacterial activity of the compounds is related to the cell wall structure of the tested bacteria. Comparing the inhibitory activities of the tested complexes, it was found that the 1-substituted- -2-aminobenzimidazole derivatives were more active than complexes of 1-substituted- 2-amino-5,6-dimethylbenzimidazoles. The effect of chemical structure on the antibacterial activity is discussed.

scholarly journals Antibiogram of single, double and triple chain Aroyl hydrazine against some gram positive and gram negative bacteria

1970 ◽  
Vol 1 (1) ◽  
pp. 17-21
Author(s):  
R Parvin ◽  
MN Absar ◽  
M Ershaduzzaman ◽  
ATM Mahbub-E-Elahi ◽  
A Shil
Keyword(s):  
Inhibition Zone ◽  
Antibacterial Activities ◽  
Diffusion Method ◽  
Gram Negative Bacteria ◽  
Significant Activity ◽  
Single Chain ◽  
Double Chain ◽  
Gram Positive ◽  
Gram Negative ◽  
Bacterial Cell Membrane

The antibacterial sensitivity of some single, double and triple chain aroylhydrazine against gram positive and gram negative bacteria were performed by disc diffusion method. Most of the compounds showed appreciable antibacterial activity against different gram positive and gram negative bacteria. The single chain hydrazines are more active then double chain and triple chain hydrazine. Among the single chain aroylhydrazines studied only 4-n-hexyloxy benzoyl hydrazine is the most active. The significant activity of 4-n-hexyloxybenzoyl hydrazine and heptyloxybenzoyl hydrazine against gram positive and gram negative bacteria may be (formation of inhibition zone 8 to 22 mm with most of the test bacteria) due to their liophilicity of the bacterial cell membrane. Anti-microbial activity decreases as the number of carbon of single chain hydrazine increases (C6 > C7 > C8 > C9 > C10 single chain hydrazine). Double chain hydrazines (3, 5 or 3, 4) are more active than triple chain hydrazines (3, 5 > 3, 4 > 3, 4, 5 hydrazine). The antibacterial activities of hydrazines are being decreased as their increasing number of side chain.Keyword: Antibacterial sensitivity; Aroyl hydrazine.DOI: http://dx.doi.org/10.3329/ijns.v1i1.8610 International Journal of Natural Sciences (2011), 1(1):17-21 

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