Where can I get Polyglycerol polyricinoleate (PGPR) as emulsifier for water in oil emulsion?

I am having difficulty to get polyglycerol polyricinoleate (PGPR) as surfactant in emulsion formulation. Currently, I am having problem in getting stable double nanoemulsion. I read most journals...

07 August 2019 710 1 View

How do I dissolve water in oil (w/o) nanoemulsion in water?

I did quick preliminary solubility study on my flavonoid enriched extract in oil and water phase. I found my extract is more soluble in water. Prior this study, I thought my extract is oil soluble...

06 July 2019 860 4 View

What is the alternative dye for Nile red (NR) for solvent polarity testing?

Hi. I would like to use this platform to ask question regarding the alternative dyes which can be used for solvent polarity testing. So far I came across Nile red (NR) which commonly used for...

04 May 2019 7,366 2 View

How do I evaporate off the natural deep eutectic solvent (NADES)?

I am currently developing natural deep eutectic solvents (NADES) for flavonoid extraction from my plant sample. However, I am having the difficulty to evaporate off the developed NADES in order to...

03 April 2019 3,749 5 View

Is it possible desorption ratio more than 100%?

Currently, I am conducting research on the adsorption and desorption of flavonoids in plant extract by using macroporous resins. After equilibrium, the adsorbed flavonoids by resins were treated...

09 October 2018 1,913 7 View

For dynamic adsorption studies, how do I know my adsorbent (resins) already reach equilibrium before I start desorbing it with solvent?

I am currently conducting dynamic adsorption and desoprtion studies on flavonoids by using macroporous resins. I am having difficulty to understand at what point should I consider the resins...

07 August 2018 5,920 2 View

How to separate very close peaks in HPLC?

I am having difficulty to separate very close peaks which are isomers. Currently I am using Xbridge Waters C18 column (4.5 mm, 150 mm and 5 micrometer). I used solvent A as water (0.1% acetic...

06 July 2018 3,004 4 View

Can Response Surface Methodology (RSM) be used after the optimization work already done?

I plan to analyze the optimization results using RSM. However, I wonder can my present data be used in RSM. Previously, I optimized my extraction conditions individually. For example, to get...

03 April 2018 345 3 View

Inconsistency of total flavonoid content (TFC) result?

I carried out TFC determination using NaNO2-AlCl3-NaOH assay in 96 well plates. However, after repeating a few times using the same methods and volume the result is inconsistent. I realised the...

03 April 2018 4,935 0 View

Can I use 570nm for FRAP?

I am doing research on FRAP (TPTZ reagent method) for antioxidant activity. I know the preferred wavelength is 593nm. Is it possible to measure at 570nm instead as for now the 593nm filter not...

02 March 2018 1,621 3 View

What are the most reliable approaches to extract key continuous frames from a video, with complete automation?

I have an input video, of skin (from a microscope that means it is magnified such that blood capillaries are visible). The idea is to extract 15 sec of continuous frames from a video of 1 min,...

02 March 2021 2,735 2 View

Is there any research regarding how training and development is going to change in the era of Fourth Industrial Revolution?

As the organizations getting prepared for the fourth industrial revolution, to enhance the skills of their workforce what type of changes are necessary and going to occur in the training and...

01 March 2021 3,199 3 View

How to calculate Total Flavonoid?

I analyzed flavonoid total spectrophotometry, the procedure as below: 2 ml supernatan added 5 ml dd.H2O, then added 0,15 ml NaNO2 5%, 5 minutes later added 0,15 ml AlCl3 10%, After 6 minutes,...

01 March 2021 6,722 1 View

How can extract ciprofloxacin hydrochloride disolve in water er to organic solvent such as dichloromethan or any other solvent?

I need a procedure to extract the ciprofloxacin hydrochloride from aqueous solution by using dichloromethane in detail,. I thank you very much.

01 March 2021 4,306 1 View

Which bacteria are suitable for quorum sensing screening?

I want to find a quorum sensing inhibitor from plant extracts. Klebsiella pneumoniae, Moraxella catarrhalis, Staphylococcus aureus, and Streptococcus pneumoniae. I looked for these strains...

01 March 2021 7,675 3 View

How to perform statistical analysis of coefficients extracted from transform techniques?

I am studying the potential of DCT and FFT coefficients extracted from a signal to classify the different objects that emit the signal. I applied the Shapiro-Wilk to confirm that data was not...

01 March 2021 8,079 2 View

How to remove fatty material from plant extract?

The resultant solid was partitioned three times with 250 ml of petroleum ether (40-60/c) to remove any fatty material and evaporated to dryness.

28 February 2021 9,464 2 View

Can water be extracted from Olivine?

I have always been interested in geology and wondered about how unique structures of materials behave in different circumstances. I stumbled upon Olivine, the magnesium iron silicate, and heard...

28 February 2021 7,330 4 View

How to make fractions of chloroform extract of plant, using seperating funnel?

28 February 2021 8,466 2 View

Good morning research fellows, Has anyone worked with senna alata plant extract on any kind of fish?

Literatures on the piscicidal effect of sennaa alata is scanty. if you have any related litrature either in the bark, leaves or roots used as treatment to any aquatic organism please kindly help...

28 February 2021 9,138 2 View