Antibacterial and antifungal activity of the liverwort (Ptilidium pulcherrimum) methanol extract

The antimicrobial activity of the methanol extract from the liverwort, Ptilidium pulcherrimum was evaluated against five bacterial and six fungal species. In vitro antibacterial activity was assessed by disc diffusion and microdilution methods. The extract showed a stronger effect against tested Gram (+) than Gram (-) bacteria. The antifungal activity of the methanol extract was tested using a microdilution method. The methanol extract showed strong antifungal activity. The best antifungal activity was achieved against Trichoderma viride compared to the synthetic fungicide bifonazol

Antibacterial and antifungal activity of the liverwort (Ptilidium pulcherrimum) methanol extract

The antimicrobial activity of the methanol extract from the liverwort, Ptilidium pulcherrimum was evaluated against five bacterial and six fungal species. In vitro antibacterial activity was assessed by disc diffusion and microdilution methods. The extract showed a stronger effect against tested Gram (+) than Gram (-) bacteria. The antifungal activity of the methanol extract was tested using a microdilution method. The methanol extract showed strong antifungal activity. The best antifungal activity was achieved against Trichoderma viride compared to the synthetic fungicide bifonazol.Antibakterijsko i antifungalno dejsto metanolnog ekstrakta jetrenjače Ptilidium pulcherrimum ispitivano je na 5 vrsta bakterija i 6 mikromiceta. Za ispitivanje in vitro antimikrobnog dejstva ekstrakta korišćena je metoda mikrodilucije na mikrotitracionim pločama i metoda difuzije sa filter diskova. Ekstrakt je pokazao jači efekat na testirane Gram (+), nego na Gram (-) bakterije. Antifungalna aktivnost metanolnog ekstrakta ispitana je mikrodilucionom metodom. Testirani ekstrakt pokazao je jak antifungalni potencijal na Trichoderma viride, Bifonazol je pokazao skoro identičnu fungistatičku aktivnost, dok je njegova fungicidna aktivnost bila nešto viša u poređenju sa metanolnim ekstraktom analizirane jetrenjače.Projekat ministarstva br. 143049 i 14304

Fabrication and applications of multifunctional nanostructured TiO2

Nanomaterials development is a rapidly emerging field of research with enormous potential for societal and economic benefits. In agro and food industries dimension-dependent properties or phenomena of nanomaterials may be used for various functional effects such as increased bioavailability or decreased toxicity of products, better detection of pathogens, improved food packaging materials, or improved delivery of nutrients. Since these effects may derive from altered or unique characteristics of materials in the nanoscale range that are not normally observed or expected in larger-scale materials with the same chemical composition, such changes raise questions about the safety, effectiveness, performance, quality or public health impact of nanotechnology products. In this article, we have reviewed the fabrication, properties, and selected applications of nanostructured TiO2 based materials. Special attention has been paid to TiO2 nanoparticles and nanotubes fabrication perspectives and applications in agriculture. We have shown that high photocatalytic disinfection and photobiological effects of nanostructured TiO2 coupled with its low price, nontoxicity, and stable performance especially provide new approaches for solving environmental pollution and pesticide residue problems in agriculture.Paper: [https://hdl.handle.net/21.15107/rcub_dais_5121

The chemical composition, antimicrobial and antioxidant activities of the essential oil of Salvia fruticosa growing wild in Libya

The composition of essential oil isolated from Salvia fruticosa, wild growing in Libya, was analyzed by GC and GC-MS. Forty-five compounds could be identified. The essential oil contained 1,8-cineole (49.34%), camphor (7.53%), β-pinene (7.38%), myrcene (7.38%), α-pinene (5.15%), β-caryophyllene (4.13%) and α-terpineol (3.25). Antioxidant activity was analyzed using the DPP H free radical scavenging method and low antioxidant activity was found (IC50 = 15.53 mg/ml). The oil was also screened for its antimicrobial activity against eight bacteria (four Gram-negative and four Gram-positive) and eight fungi. The essential oil of S. fruticosa showed minimal inhibitory activity (MIC) at 0.125-1.5 mg/ml and bactericidal (MBC) at 0.5-2.0 mg/ml. In addition, it exhibited fungistatic (MIC) at 0.125-1.0 mg/ml and fungicidal effect (MFC) at 0.125-1.5 mg/ml.Projekat ministarstva br. 173029 i br. 17303

Antibacterial and antifungal activity of the liverwort (Ptilidium pulcherrimum) methanol extract

The antimicrobial activity of the methanol extract from the liverwort, Ptilidium pulcherrimum was evaluated against five bacterial and six fungal species. In vitro antibacterial activity was assessed by disc diffusion and microdilution methods. The extract showed a stronger effect against tested Gram (+) than Gram (-) bacteria. The antifungal activity of the methanol extract was tested using a microdilution method. The methanol extract showed strong antifungal activity. The best antifungal activity was achieved against Trichoderma viride compared to the synthetic fungicide bifonazol.Antibakterijsko i antifungalno dejsto metanolnog ekstrakta jetrenjače Ptilidium pulcherrimum ispitivano je na 5 vrsta bakterija i 6 mikromiceta. Za ispitivanje in vitro antimikrobnog dejstva ekstrakta korišćena je metoda mikrodilucije na mikrotitracionim pločama i metoda difuzije sa filter diskova. Ekstrakt je pokazao jači efekat na testirane Gram (+), nego na Gram (-) bakterije. Antifungalna aktivnost metanolnog ekstrakta ispitana je mikrodilucionom metodom. Testirani ekstrakt pokazao je jak antifungalni potencijal na Trichoderma viride, Bifonazol je pokazao skoro identičnu fungistatičku aktivnost, dok je njegova fungicidna aktivnost bila nešto viša u poređenju sa metanolnim ekstraktom analizirane jetrenjače.Projekat ministarstva br. 143049 i 14304

The chemical composition, antimicrobial and antioxidant activities of the essential oil of Salvia fruticosa growing wild in Libya

The composition of essential oil isolated from Salvia fruticosa, wild growing in Libya, was analyzed by GC and GC-MS. Forty-five compounds could be identified. The essential oil contained 1,8-cineole (49.34%), camphor (7.53%), β-pinene (7.38%), myrcene (7.38%), α-pinene (5.15%), β-caryophyllene (4.13%) and α-terpineol (3.25). Antioxidant activity was analyzed using the DPP H free radical scavenging method and low antioxidant activity was found (IC50 = 15.53 mg/ml). The oil was also screened for its antimicrobial activity against eight bacteria (four Gram-negative and four Gram-positive) and eight fungi. The essential oil of S. fruticosa showed minimal inhibitory activity (MIC) at 0.125-1.5 mg/ml and bactericidal (MBC) at 0.5-2.0 mg/ml. In addition, it exhibited fungistatic (MIC) at 0.125-1.0 mg/ml and fungicidal effect (MFC) at 0.125-1.5 mg/ml.Projekat ministarstva br. 173029 i br. 17303

Customizing nanotubular titania for photocatalytic activity

Semiconductor TiO2 photocatalysis is a heterogeneous catalysis, where the photons of the sun or artificial light source are activating the catalyst that enters in reactions. The targeted real-world applications are in environmental protection and remediation such as wastewater treatment, air purification and decomposition of harmful organic pollutants. In this talk, I present the synthesis of nanotubular, thin TiO2 coatings with altered morphology and crystallinity made by anodization technique. The influence of the anodization parameters and post-synthesis annealing conditions on the photocatalytic methyl orange dye decomposition was assessed. Different morphology, crystallinity and introducing a dopant into lattice increase electron transport and electron lifetime which further improve photocatalytic activity

Photoactivity of vanadium oxide TiO2 nanotubes

The aim of this study was to investigate the influence of vanadium oxide photosensitive surface layer on the photoactivity of TiO2 nanotubes. Nanotube arrays were synthesized by anodization of titanium foil at different voltages, and vanadium-oxide was deposited by wet chemical deposition. Deposition of the vanadium-oxide layer was confirmed by XPS analysis, which provided the chemical composition of the sample surface. Photovoltaic characteristics and photocatalytic performance for photodegradation of methyl orange dye of modified TiO2 nanotubes were correlated with the nanotube morphology (and anodization voltage). Optimal anodization voltage was determined, in conjunction with the deposition of the surface vanadium oxide layer, in order to achieve maximum performance of the modified TiO2 electrodes. This has been correlated with changes in the optical properties of the TiO2 electrodes, the nanotube length and diameter, as they occur with the change in the anodization voltage, as well as the changes in the vanadium-oxide content in the samples, where the vanadium-oxide content was found to be determined by the nanotube morphology. The photovoltaic performance of the optimized modified TiO2 electrode with the surface vanadium-oxide layer was found to be significantly better than both the performance of the corresponding TiO2 electrode, and the performance of all the other TiO2 electrodes included in the study

Influence of Synthesis Parameters on Structure of 1-D TiO2 nanostructures

The influence of electrochemical conditions and the heat treatment on the crystal structure and the microstructure evolution of TiO2 based nanotubes synthesized by the self-ordering anodization process is investigated in this work. The electrochemical anodization was performed at room temperature, for 30 minutes under 15, 20 and 25 V, with stirring. The as-anodized Ti foils were annealed in air at 450, 600, 650 and 700 °C for 30 minutes. The structure and the lattice dynamics of the samples has been studied by using XRD and Raman spectroscopy methods. The microstructure development of the 1-D TiO2 nanostructures has been analyzed by FESEM

Influence of Synthesis Parameters on Structure of 1-D TiO2 nanostructures

The influence of electrochemical conditions and the heat treatment on the crystal structure and the microstructure evolution of TiO2 based nanotubes synthesized by the self-ordering anodization process is investigated in this work. The electrochemical anodization was performed at room temperature, for 30 minutes under 15, 20 and 25 V, with stirring. The as-anodized Ti foils were annealed in air at 450, 600, 650 and 700 °C for 30 minutes. The structure and the lattice dynamics of the samples has been studied by using XRD and Raman spectroscopy methods. The microstructure development of the 1-D TiO2 nanostructures has been analyzed by FESEM