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Antibacterial Activity of Silver Nanoparticles Using Salvia officinalis Extract on Some Pathogenic Bacteria

Journal of Pharmacy and Pharmacology 2019年第5期7卷 237-248页

作者： Sarah Mohanad Yaseen Asmaa A.Hussein Ruqaya M.Al-Ezzy Department of Molecular and Medical Biotechnology College of BiotechnologyAl-Nahrain UniversityBaghdadIraq

This study included evaluation for the effects of green synthetic nanoparticles of Salvia officinalis aqueous leaf extract loaded with silver nitrate on antibacterial activity. Green synthetic nanoparticles were synthesized by mixing the plant extract with different AgNO3 concentrations (1 mM, 1.5 mM, 1.75 mM, and 2 Mm) then they were detected by color changing and UV visible spectroscopy, which gave indication for the creation of silver nanoparticles. A characteristic and definite surface plasmon resonance (SPR) band for silver nanoparticles was obtained at around 433 nm. The SPR peak of silver nanoparticles extreme peak intensity was obtained at 1.75 mM of AgNO3. Atomic Force Microscopy analysis was used to characterize silver nanoparticles which declared that the shape of green synthetic nanoparticles had different average size depending on sliver concentrations. Since it was observed that the shape and size of green synthetic nanoparticles were concentrations dependent (89.69 nm, 80.94 nm, 76.98 nm and 60.28 nm) respectively for AgNO3 concentrations tested (1 mM, 1.5 mM, 1.75 mM and 2 mM). The antibacterial activity of green synthetic sliver nanoparticles was studied for all G+ve and G-ve selected isolates (Staphylococcus aureus, Staphylococcus heamolytics, Streptococcus pnemoniae, Enterococcus faecalis) and others G-ve bacterial isolates (Escherichi coli, Klebsiella pneumoniae, Proteus vulgaris, Pseudomonas aeruginosa) and the result showed that different green synthetic nanoparticles concentrations (1, 1.5, 1.75, 2 mM) have the ability to inhibit all bacterial isolates with varying zones of inhibition higher than the inhibition observed by ready to use sliver nanoparticles. Minimum inhibitory concentrations (MIC) of green synthetic nanoparticles were obtained in concentration of (31, 27, 23 and 16 μm/mL) for G+ve (S. auerus) and (187, 125, 125, 109 μm/mL) for G-ve (E. coli) at (1, 1.5, 1.75, 2 mM) respectively. The activity of green synthetic sliver nanopartic

关键词： Salvia officinalis sliver nitrate antibacterial minimum inhibitory concentrations biofilm

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INFLUENCE OF CHLORIDE MATRIX ON LEAD IN GA-3 GRAPHITE FURNACE ATOMIZER

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Chinese Science Bulletin 1985年第1期30卷 139-页

作者：郑衍生刘烟生 Department oF Chemistry Jilin University Changchun

In this letter a preliminary study of the influence of chloride matrices on lead was described. HITACHI Model 180-50 atomic absorption spectrometry and cup cuvette were used. Pb 283.3 nm was used for measurement. Lead hollow cathode lamp was operated at 7.5mA. All absorbance-time curves were obtained under the following graphite atomizer program, as indicated by the temperature and time displaying on the CRT screen: dry, 80—120℃ (30s); ash, 400~℃ (30s); atomize, 2000℃ (7s); and clean, 2400℃ (3s). Aqueous test solution of lead was taken as the nitrate, and aqueous matrix solu-

关键词： hollow graphite cathode nitrate preliminary operated absorbance matrices heating inert

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Influence of some essential environmental factors on the reductive precipitation of uranium by sulfate reducing bacteria

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Acta Geochimica 2006年第S1期 116-116页

作者： Zhengji YI1, Kaixuan TAN2, Aili TAN2, Zhenxun YU2, Yanshi XIE2 1 State Key Laboratory of Organic Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China 2 School of Architecture, Resources and Environment Engineering, Nanhua University, Hengyang 421001, China

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Effects of Nitrogen Application on Plant Growth and Soil Inorganic Nitrogen Content in Alpine Grasslands

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Agricultural Biotechnology 2018年第6期7卷 130-135页

作者： Bing YU Kening WU School of Land Science and Technology China University of Geosciences Key Laboratory of Land Consolidation and Rehabilitation Ministry of Land and Resources of the People's Republic of China

In order to further determine the nitrogen demand of plants in alpine grassland ecosystem,different nitrogen levels( 0,1,2,4,8,16,24,32 g/m2)were designed through field control to study the responses of different plant functional groups( grass,sedge and weed) to different nitrogen application levels in the aboveground biomass and soil inorganic nitrogen( nitrate nitrogen and ammonium nitrogen).The results showed that with the increase of nitrogen application rate,the aboveground biomass of different functional groups increased linearly,and the soil inorganic nitrogen content increased with the increase of nitrogen application rate,among which treatments N16,N24 and N32 increased significantly in soil nitrate nitrogen content( P nitrate nitrogen content.

关键词： Nitrogen application Alpine grassland Plant growth nitrate nitrogen Ammonium nitrogen Rational use

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Measurement of the total nitrogen in lake sediments: Comparison and its environmental significance

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Acta Geochimica 2006年第S1期 12-12页

作者： Wei JIANG1,2, Xinqing LEE1 1 State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China 2 Graduate School of Chinese Academy of Sciences, Beijing 100039, China

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Effect of Different Sources and Doses of Nitrogen on Vegetative and Productive Performance of Sugarcane under a Dystrophic Red Latosol Condition

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Journal of Agricultural Science and Technology(B) 2018年第1期8卷 50-59页

作者： Flávio Henrique Ferreira Gomes Frederico Antonio Loureiro Soares Marconi Batista Teixeira Edson Cabral da Silva Nelmicio Furtado da Silva Fernando Nobre Cunha Cicero Teixeira Silva Costa Federal Institute of Education Science and Technology of GoiásRio Verde CampusRio Verde 75901-970GOBrazil Federal Institute of Education Science and Technology of Mato Grosso do SulCampus NaviraíNaviraí79950-000MSBrazil

The aim of this work was to evaluate the effects of the application of different sources and doses of nitrogen(N)in the growth and productivity of sugarcane in cane *** experiments were conducted in the area of Rio Paraiso II farm,belonging to the Raízen factory,in the city of Jataí,*** soil was classified as dystrophic red *** experimental design used was in randomized block,analysed in factorial scheme of 2×4×4,with three *** factors analysed were two sources of N(urea and ammonium nitrate),four doses of N(0,60,120 and 180 kg/ha)and four evaluation times(210,250,290 and 330 d after planting(DAP)).The parameters analysed were plant height(PH),diameter of stalks(DS),length of internodes(LI)and productivity of stalks(PS).Results observed significant difference in the sources and doses of N for the evaluated parameters in sugarcane *** in the average doses of 110 kg/ha and 100.87 kg/ha provided the greatest PH and LI of sugarcane,*** nitrate at a dose of 180 kg/ha presented the largest DS of sugarcane(cane plant)at 330 *** PS of sugarcane SP80-1816 at 60 kg/ha and 120 kg/ha ammonium nitrate has higher *** the PS,it is recommended the application of doses between 60 kg/ha and 120 kg/ha of N of the source ammonium nitrate in sugar cane(cane plant).

关键词： Saccharum spp. urea ammonium nitrate yield biometry

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