نتایج جستجو برای: cell suspension hypericum perfuratum hypericin hyperforin nano particles

تعداد نتایج: 1886402  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سمنان - دانشکده شیمی 1391

we used dbsa and nano-magnetic for the synthesis of amido alkylnaphtols.

Journal: :international journal of advanced design and manufacturing technology 0
farhad reiszadeh abbas nikbakht

in this research between 3-dimensional and axisymmetric modeling for movement of nano-particles in passing through a aerodynamic lens, and also between these models and famous model of wang & liu was compared. for this purpose, output of nano-particles penetration, divergence angel, and nano-particle velocity with wang & liu model was compared. geometrical model used for aerodynamic lens compar...

Journal: :jundishapur journal of microbiology 0
peyman derikvand department of biology, faculty of sciences, university of isfahan,isfahan, ir iran zahra etemadifar department of biology, faculty of sciences, university of isfahan,isfahan, ir iran; department of biology, faculty of sciences, university of isfahan,isfahan, ir iran. tel: +98-3117932367, fax: +98-3117932456

background sulfur oxides released from the burning of oil causes severe environmental pollution. the sulfur can be removed via the 4s pathway in biodesulfurization (bds). immobilization approaches have been developed to prevent cell contamination of oil during the bds process. objectives the encapsulation of rhodococcus erythropolis r1 in calcium alginate beads was studied in order to enhance c...

Journal: :international journal of nano dimension 0
s. saber-samandari new technologies research centre, amirkabir university of technology, tehran, po box 1591633311, iran.

in the current paper, finite element method is employed for numerical simulations and the study of influential parameters on elastic modulus of polymer-matrix nano-composites. effects of different key parameters including particle elastic modulus, interphase elastic modulus, matrix elastic modulus, interphase thickness and particle volume fraction on total elastic modulus of nano-composite mate...

Background and Objectives: Zinc oxide (ZnO) nano-particles have been proven to have strong antibacterial activity against food borne pathogens. The practical applications of different concentrations (Control, 0, 1, 2, 4, 6 and 8 mM) of ZnO suspensions containing 1% acetic acid were investigated against the pathogenic bacteria like Staphylococcus aureus. Materials and Methods: The projects of l...

Journal: :Scientific reports 2015
Qian Zhang Zhuo-heng Li Yuan-yuan Li San-jun Shi Shi-wen Zhou Yuan-yuan Fu Qing Zhang Xue Yang Ruo-qiu Fu Lai-chun Lu

The conventional photosensitizers used in photodynamic therapy (PDT), such as haematoporphyrin (HP), have not yet reached satisfactory therapeutic effects on port-wine stains (PWSs), due largely to the long-term dark toxicity. Previously we have showed that hypericin exhibited potent photocytotoxic effects on Roman chicken cockscomb model of PWSs. However, the molecular mechanism of hypericin-m...

Journal: :Molecules 2017
Petronela Imreova Jana Feruszova Stanislav Kyzek Kristina Bodnarova Martina Zduriencikova Katarina Kozics Pavel Mucaji Eliska Galova Andrea Sevcovicova Eva Miadokova Ivan Chalupa

Hyperforin (HF), a substance that accumulates in the leaves and flowers of Hypericum perforatum L. (St. John's wort), consists of a phloroglucinol skeleton with lipophilic isoprene chains. HF exhibits several medicinal properties and is mainly used as an antidepressant. So far, the antigenotoxicity of HF has not been investigated at the level of primary genetic damage, gene mutations, and chrom...

2013
Yulin Tang Shuyan Li Junlian Qiao Hongtao Wang Lei Li

Anabaena sp. was used to examine the toxicity of exposure to a nano-TiO2 suspension, Zn2+ solution, and mixtures of nano-TiO2 and Zn2+ suspensions. Typical chlorophyll fluorescence parameters, including effective quantum yield, photosynthetic efficiency and maximal electron transport rate, were measured by a pulse-amplitude modulated fluorometer. Nano-TiO2 particles exhibited no significant tox...

Journal: :Physiological research 2001
A Mirossay H Onderková L Mirossay M Sarisský J Mojzis

Protective effect of quercetin, a natural antioxidant compound, on hypericin-induced cytotoxicity was studied in human promyelocytic leukemia cells (HL-60). Hypericin (10(-5) mol x l(-1)) alone significantly decreased cell survival to 21% that found in the controls, whereas in combination with quercetin (10(-5) mol x l(-1)) this decrease was diminished to 46%. Lower concentrations of quercetin ...

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