Objective:To investigate the antibacterial activity of patchouli alcohol(PA)against 127 bacteria strains,including the common bacteria and drug-resistant bacteria strains both in the in vitro and in vivo tests.Methods...Objective:To investigate the antibacterial activity of patchouli alcohol(PA)against 127 bacteria strains,including the common bacteria and drug-resistant bacteria strains both in the in vitro and in vivo tests.Methods:For the in vitro trial,the antibacterial property of PA against 107 Gram-positive and 20 Gram-negative bacteria strains was screened by agar double dilution method.For the in vivo trial,specific pathogen free Kunming strain of both male and female white mice,were used to test the protective ability of PA after being injected with the median lethal dose of the tested strains.Results:PA possessed antibacterial activity against all the tested 127 strains.In the in vitro test,PA could inhibit both Gram-negative bacteria(25-768μg/m L)and Gram-positive bacteria(1.5-200μg/m L).Particularly,PA was active against some drug-resistant bacteria like methicillin-resistant Staphylococcus aureus(MRSA).PA also exhibited in vivo anti-MRSA activity in mice via intraperitoneal injection.PA could protect mice entirely infected with MRSA at 100 and 200 mg/kg,while 80% mice injected with MRSA could be protected at a low dose of 50 mg/kg.Conclusion:PA might be a potential antibacterial drug from natural sources and might be worthy to explore its mechanism and application in further study.展开更多
以中国传统酸菜为原料,通过抑菌试验、生理生化鉴定与16 S rDNA测序技术筛选出一株产抑菌物质的植物乳杆菌FZU122.采用醇沉、葡聚糖凝胶色谱柱与HPLC分离、纯化并结合抑菌试验,由该菌株发酵液中获得一种高纯度抗菌物质.基于纳升液相色谱...以中国传统酸菜为原料,通过抑菌试验、生理生化鉴定与16 S rDNA测序技术筛选出一株产抑菌物质的植物乳杆菌FZU122.采用醇沉、葡聚糖凝胶色谱柱与HPLC分离、纯化并结合抑菌试验,由该菌株发酵液中获得一种高纯度抗菌物质.基于纳升液相色谱-四极杆飞行时间串联质谱联用仪分析鉴定,该物质是一种由10个氨基酸组成的细菌素ARLGLPVHVV,相对分子质量为1059.6553,带2个正电荷,命名为Plantaricin-fzu 122.抑菌实验结果显示Plantaricin-fzu 122对大肠杆菌、鼠伤沙门氏菌、耐甲氧西林金黄色葡萄等食源性致病菌具有不同程度的抑菌活性.综上所述,Plantaricin-fzu 122是一类可用于控制食源性致病菌污染且具有巨大开发潜力的生物防腐剂.展开更多
In the modern science, priority is given for the search of biological active compounds with specific properties. As a result of experimental data, it was found that in the reaction between N-(<em>β</em>-D...In the modern science, priority is given for the search of biological active compounds with specific properties. As a result of experimental data, it was found that in the reaction between N-(<em>β</em>-D-glycopyranosyl)-semicarbazide and the Lawesson reagent (2,4-bis(p-methoxyphenyl)-1,3-dithiadiphosphetane 2,4-disulfide) at the ratio 1:1 in pyridine when boiling under reflux in a water bath for 20 - 35 minutes, a new synthetic compound N-(<em>β</em>-D-glycopyranosyl)-thiosemicarbazide is formed. The individuality and structure of the target products were confirmed by 13C NMR spectroscopy, 1H NMR spectroscopy, IR spectroscopy, and elemental analysis. For the synthesized new compounds of N-(<em>β</em>-D-glycopyranosyl)-thiosemicarbazides, the probability of pharmacological and toxic effects were predicted by the computer method in silico. From the synthesized compounds N-(<em>β</em>-D-galactopyranosyl)-thiosemicarbazide, the probability of antibacterial (antibacterial) activity is predicted (<em>Pa</em>/<em>Pi</em> 0.544/0.013). The antibacterial activity of the compound (4) was confirmed in a test for salmonella infection of lambs, salmonellosis of calves, and colipathogenic E. coli serotypes. An experimental study by the in vitro method made it possible to conclude that the new synthetic compound N-(<em>β</em>-D-galactopyranosyl)-thiosemicarbazide in the studied concentrations has a pronounced bactericidal and bacteriostatic effect. The synthetic new compound N-(<em>β</em>-D-glyco- pyranosyl)-thiosemicarbazide is a promising compound for further study.展开更多
<div style="text-align:justify;"> <span style="font-family:Verdana;">The aim of this work is to synthesize, characterize and evaluate the biological activity of 1,4-naphthoquinone deriv...<div style="text-align:justify;"> <span style="font-family:Verdana;">The aim of this work is to synthesize, characterize and evaluate the biological activity of 1,4-naphthoquinone derivatives ligands and their metal—Co(II), Ni(II) and Cu(II) chelates. Continuing our work with another derivatives of 1,4-naphthoquinone ligands, this work had been constructed for synthesis of new ligands derived from 1,4-naphthoquinone such as 3-thioacetyl-2-amino-1,4-naphthoquinone and 2-benzoyl-3-amino-1,4-naphthoquinone (L<span style="white-space:nowrap;"><sup>1</sup></span>-L<span style="white-space:nowrap;"><sup>2</sup></span>) which characterized on the basis of elemental analysis, electronic, IR, mass, <span style="white-space:nowrap;"><sup>1</sup></span>H-NMR spectral data. The synthesized ligands have been carried out to achieve the coordination behavior towards bi-valent metal ions like cobalt, nickel and copper. The solid chelates of the different ligands were prepared and subjected to analytical techniques such as elemental analyses, spectroscopic techniques including mass, <span style="white-space:nowrap;"><sup>1</sup></span>H-NMR, and IR spectroscopy, and thermal analyses techniques. The chelates were found to have octahedral geometry. The biological activity of the prepared ligands and their binary metals complexes were also screened against different antifungal and antibacterial organisms.</span> </div>展开更多
<span style="font-family:Verdana;">The objective of this study is </span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="...<span style="font-family:Verdana;">The objective of this study is </span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">t</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">o isolate, identify and investigate the pharmacological activities of the</span></span></span><span><span><span style="font-family:""><span style="font-family:Verdana;"> endophytic fungi from an aquatic plant </span><i><span style="font-family:Verdana;">Aponogeton undulatus </span></i><span style="font-family:Verdana;">Roxb. (</span><i><span style="font-family:Verdana;">A. undulatus</span></i><span style="font-family:Verdana;">). </span></span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">Endophytic fungi were isolated and identified based on morphological characters.</span></span></span><span><span><span style="font-family:""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">The molecular identification of the fungal isolates was performed</span></span></span><span><span><span style="font-family:""> </span></span></span><span><span><span style="font-family:""><span style="font-family:Verdana;">using by analyzing the DNA sequence based on mega BLAST program. Spectrums of antibacterial and antifungal activities </span><span style="font-family:Verdana;">were studied by Agar diffusion methods. Extracts of the endophytic funga</span><span style="font-family:Verdana;">l strains isolated from the plant </span><i><span style="font-family:Verdana;">A. undulatus</span></i><span style="font-family:Verdana;"> were screened for probable cytotoxic activities using brine shrimp </span><span style="font-family:Verdana;">lethality bioassay. Six</span></span></span></span><span><span><span style="font-family:""> </span></span></span><span style="font-family:Verdana;"><span style="fon展开更多
基金Supported by the National Key Technology Research and Development Program of China(No.2009BAI84B00)。
文摘Objective:To investigate the antibacterial activity of patchouli alcohol(PA)against 127 bacteria strains,including the common bacteria and drug-resistant bacteria strains both in the in vitro and in vivo tests.Methods:For the in vitro trial,the antibacterial property of PA against 107 Gram-positive and 20 Gram-negative bacteria strains was screened by agar double dilution method.For the in vivo trial,specific pathogen free Kunming strain of both male and female white mice,were used to test the protective ability of PA after being injected with the median lethal dose of the tested strains.Results:PA possessed antibacterial activity against all the tested 127 strains.In the in vitro test,PA could inhibit both Gram-negative bacteria(25-768μg/m L)and Gram-positive bacteria(1.5-200μg/m L).Particularly,PA was active against some drug-resistant bacteria like methicillin-resistant Staphylococcus aureus(MRSA).PA also exhibited in vivo anti-MRSA activity in mice via intraperitoneal injection.PA could protect mice entirely infected with MRSA at 100 and 200 mg/kg,while 80% mice injected with MRSA could be protected at a low dose of 50 mg/kg.Conclusion:PA might be a potential antibacterial drug from natural sources and might be worthy to explore its mechanism and application in further study.
文摘In the modern science, priority is given for the search of biological active compounds with specific properties. As a result of experimental data, it was found that in the reaction between N-(<em>β</em>-D-glycopyranosyl)-semicarbazide and the Lawesson reagent (2,4-bis(p-methoxyphenyl)-1,3-dithiadiphosphetane 2,4-disulfide) at the ratio 1:1 in pyridine when boiling under reflux in a water bath for 20 - 35 minutes, a new synthetic compound N-(<em>β</em>-D-glycopyranosyl)-thiosemicarbazide is formed. The individuality and structure of the target products were confirmed by 13C NMR spectroscopy, 1H NMR spectroscopy, IR spectroscopy, and elemental analysis. For the synthesized new compounds of N-(<em>β</em>-D-glycopyranosyl)-thiosemicarbazides, the probability of pharmacological and toxic effects were predicted by the computer method in silico. From the synthesized compounds N-(<em>β</em>-D-galactopyranosyl)-thiosemicarbazide, the probability of antibacterial (antibacterial) activity is predicted (<em>Pa</em>/<em>Pi</em> 0.544/0.013). The antibacterial activity of the compound (4) was confirmed in a test for salmonella infection of lambs, salmonellosis of calves, and colipathogenic E. coli serotypes. An experimental study by the in vitro method made it possible to conclude that the new synthetic compound N-(<em>β</em>-D-galactopyranosyl)-thiosemicarbazide in the studied concentrations has a pronounced bactericidal and bacteriostatic effect. The synthetic new compound N-(<em>β</em>-D-glyco- pyranosyl)-thiosemicarbazide is a promising compound for further study.
文摘<div style="text-align:justify;"> <span style="font-family:Verdana;">The aim of this work is to synthesize, characterize and evaluate the biological activity of 1,4-naphthoquinone derivatives ligands and their metal—Co(II), Ni(II) and Cu(II) chelates. Continuing our work with another derivatives of 1,4-naphthoquinone ligands, this work had been constructed for synthesis of new ligands derived from 1,4-naphthoquinone such as 3-thioacetyl-2-amino-1,4-naphthoquinone and 2-benzoyl-3-amino-1,4-naphthoquinone (L<span style="white-space:nowrap;"><sup>1</sup></span>-L<span style="white-space:nowrap;"><sup>2</sup></span>) which characterized on the basis of elemental analysis, electronic, IR, mass, <span style="white-space:nowrap;"><sup>1</sup></span>H-NMR spectral data. The synthesized ligands have been carried out to achieve the coordination behavior towards bi-valent metal ions like cobalt, nickel and copper. The solid chelates of the different ligands were prepared and subjected to analytical techniques such as elemental analyses, spectroscopic techniques including mass, <span style="white-space:nowrap;"><sup>1</sup></span>H-NMR, and IR spectroscopy, and thermal analyses techniques. The chelates were found to have octahedral geometry. The biological activity of the prepared ligands and their binary metals complexes were also screened against different antifungal and antibacterial organisms.</span> </div>
文摘<span style="font-family:Verdana;">The objective of this study is </span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">t</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">o isolate, identify and investigate the pharmacological activities of the</span></span></span><span><span><span style="font-family:""><span style="font-family:Verdana;"> endophytic fungi from an aquatic plant </span><i><span style="font-family:Verdana;">Aponogeton undulatus </span></i><span style="font-family:Verdana;">Roxb. (</span><i><span style="font-family:Verdana;">A. undulatus</span></i><span style="font-family:Verdana;">). </span></span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">Endophytic fungi were isolated and identified based on morphological characters.</span></span></span><span><span><span style="font-family:""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">The molecular identification of the fungal isolates was performed</span></span></span><span><span><span style="font-family:""> </span></span></span><span><span><span style="font-family:""><span style="font-family:Verdana;">using by analyzing the DNA sequence based on mega BLAST program. Spectrums of antibacterial and antifungal activities </span><span style="font-family:Verdana;">were studied by Agar diffusion methods. Extracts of the endophytic funga</span><span style="font-family:Verdana;">l strains isolated from the plant </span><i><span style="font-family:Verdana;">A. undulatus</span></i><span style="font-family:Verdana;"> were screened for probable cytotoxic activities using brine shrimp </span><span style="font-family:Verdana;">lethality bioassay. Six</span></span></span></span><span><span><span style="font-family:""> </span></span></span><span style="font-family:Verdana;"><span style="fon