نتایج جستجو برای: ec50
تعداد نتایج: 4357 فیلتر نتایج به سال:
An extract of Humicola fuscoatra (UCSC strain no. 108111A) was shown to reactivate latent HIV-1 expression in an in vitro model of central memory CD4+ T cells. We report the bioassay-guided isolation and structure determination of several resorcyclic acid lactones, including four known compounds, radicicol (1, aka. monorden) and pochonins B (2), C (3), and N (4), and three new analogues, radici...
The nuclear receptor retinoid X receptor (RXR) is a ligand-activated transcription factor. To create receptors for a new ligand, a structure-based approach was used to generate a library of approximately 380,000 mutant RXR genes. To discover functional variants within the library, we used chemical complementation, a method of protein engineering that uses the power of genetic selection. Wild-ty...
This study investigated the phytotoxicity of herbicides applied singly or as mixtures to different crops under greenhouse conditions. Growth inhibition of the crops was taken as an indicator of phytotoxicity. Phytotoxicity of mixtures was estimated by calculating EC50 value in toxic units. EC50 (mg/kg soil) of Alachlor, Bromacil and/or Diuron were: 11.37, 4.77, 1.64, respectively, on melon; 0.1...
Rhizoctonia solani is an important soil-borne pathogen which has a broad host range and cause damping-off or rottenness of root and crown of cultivated plants. The combined use of different control methods in IPM programs is an effective strategy against pathogens and is useful especially in resistance management programs. In this study, EC50 and EC25 values of three conventional chemical fungi...
BACKGROUND The current work is an attempt to know about additional chemical profile of Artemisia macrocephala. Antioxidant activity is performed as the plant is reported to contain flavonoids, which have antioxidant activity in general. Relaxant activity of fractions of crude methanol extract is performed to know in which fraction(s) the relaxant constituents concentrate as we have already repo...
This study aimed to isolate a potent antiglucosidase and antioxidant fraction from Stenochlaena palustris. Extraction was performed with hexane, chloroform, ethyl acetate, methanol, and water. Antiglucosidase, 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging and ferric reducing antioxidant power (FRAP) assays found methanol extract (ME) to be the most active. Water fraction (WF) of ME was a stro...
رفتار تهاجمی و حساسیت به قارچکش در سه جمعیت بیمارگر سوختگی غلاف برنج، rhizoctonia solani ag-1 ia، نسبت به تغییرات دما، با تعیین میزان بیماری روی برگ های بریده برنج و اندازه گیری رشد رویشی در محیط غذایی pda به ترتیب حاوی چهار و پنج غلظت مختلف از قارچکش های آزوکسی استروبین و پروپیکونازول در شرایط آزمایشگاه مورد ارزیابی قرار گرفت. آنالیز داده ها نشان داد که هیچ گونه علایمی از بروز بیماری به ترتیب...
رفتار تهاجمی و حساسیت به قارچکش در سه جمعیت بیمارگر سوختگی غلاف برنج، rhizoctonia solani ag-1 ia، نسبت به تغییرات دما، با تعیین میزان بیماری روی برگ های بریده برنج و اندازه گیری رشد رویشی در محیط غذایی pda به ترتیب حاوی چهار و پنج غلظت مختلف از قارچکش های آزوکسی استروبین و پروپیکونازول در شرایط آزمایشگاه مورد ارزیابی قرار گرفت. آنالیز داده ها نشان داد که هیچ گونه علایمی از بروز بیماری به ترتیب...
thirty seven isolates of erysiphe necator were collected from different vineyards from three regions and nine cities of khorasan razavi province within two time periods i.e. may to june and august to september 2009. their resistance to azoxystrobin + difenconazole (ortiva®) fungicide as well as cross resistance to penconazole and hexaconazole fungicides registered in iran for the control of pow...
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