23 Questions 41 Answers 0 Followers
Questions related from Sondos Almomani
i have this spectrum but i think the peaks look wrong??? can any one help to investigate this? plus i should get spectrum on 265 nm ? is this consider near ?
02 February 2019 8,416 1 View
i try to synthesis nano particles using green synthesis but the temperature surround 100 C and i notify the color change which indicate the nanopaticles formation but i read in the literature...
02 February 2019 7,176 7 View
i try to prepare 3 %wt of ethnaolamine ? i will take 3 ml of 99% pure 98% ethanolamine ? what solvent used to put 3 ml in it?
02 February 2019 1,569 3 View
what is the refractive index of benzyl alcohol 99%? i will measure the sample through zeta sizer but the solvent did not exit in the library of the machine?
02 February 2019 6,459 4 View
i try to synthesize platinum nano particles from hexacholoplatinumic acid with plant extract? it should change the color after few minutes from pale yellow to brown ? but with no change in...
01 January 2019 8,502 11 View
Salami doctors i will synthesis platinum nanopartcles using green synthesis but i try to put to of them on each other with no change of color i read in literature that using of surfactant is...
01 January 2019 6,223 6 View
i have plant extract and i dried it and get mass in gram after evaporation the solvent, now i want to synthesize metallic nano particles but how much mass in g, mg should dissolve in which solvent...
12 December 2018 6,701 3 View
salami researcher i dissolve 100 mg of plant extract in 5 ml of distilled water what is the dilution factor? thanks
11 November 2018 8,804 4 View
i have plant extracts from different type with in the same species and i used in folin test but some of them appear that have a peak on 725 nm with absorbance equal 4 others give 250 nm...
10 October 2018 2,360 11 View
i try to use plant extract in green synthesis of nano particles but i read in literature that i don't need to dry the sample and use the extract as it? but i read in other paper that for further...
10 October 2018 2,566 6 View
i will try to dissolve 1 mg of plant extract have phenolic compounds for Folin test in 10 ml of methanol? but i don't sure if this solvent will dissolve the extract because i used different...
10 October 2018 3,315 4 View
i need to do folin test for detection the presence of phenolic compound do i need to drying the sample by rotary evaporator then re-dissolving it in the same solvent?
10 October 2018 4,626 0 View
i will try to drying plant extract using rotary evaporator and i will get weight but to how much i should diluted the sample after drying how i can calculate the dilution factor and what i should...
10 October 2018 5,978 12 View
i have plant extract once i transfer the bottles i lost some of the solution ? what i can do ? does this will affect my results?
10 October 2018 391 8 View
i try to prepare a stock solution of sodium carbonate but i don't know how much the molarity should be ? 1 M is good? plus something else what is the optimum procedure ?i read in literature that...
10 October 2018 5,050 0 View
i try yo optimize pH of my extracts that have phenolic compound but i don't know which pH is ideal to be most stable? i read in literature that acidic media is good because phanolic compounds...
09 September 2018 2,416 4 View
i try to synthesis nano particles using green synthesis/ i need to know PH of the solution and study the effects? how i can do this? many thanks in advance
09 September 2018 6,984 16 View
i do extraction but face question: why ethanol used for short period at 70-60 c while methanol used at 20 c for 24 hours or 5 hours meaning long period? i know that methanol boiling point is less...
09 September 2018 6,489 0 View
I want to determine pH role in formation of nanoparticles platinum one by green synthesis but I don't know how to start Basically how much the pH approximately before i add any thing? How much it...
08 August 2018 8,855 3 View
It's important to monitor the pH of nanoparticles synthesis using green synthesis? Or even know how much?
08 August 2018 1,348 6 View
I try to find clear protocol for synthesis of platinum nanoparticles using plant extracts and I don't find procedure clear for platinum I find for silver and gold Can I apply the exact procedure...
08 August 2018 3,839 6 View
Hi I have to prepare GNPs and I have AB then how much the ratio between GNPs and NHS/EDC and AB!! I know that the EDC:NHS is 1:4 but to the GNPs !! How much? GNPs conjugate to AB
11 November 2017 451 0 View
i try to study pH effects on plant extract during nano particles synthesis but i don't know what to choose? strong acid and base to show the effect or buffer solution?
01 January 1970 8,129 9 View
