Dear Researchers, Please can you share with me methods for extraction of Antioxidant from marine macro-algae?

More Muhammad Hendri Hendri's questions See All

How combine yolo with Faster R-CNN?

I want a model that is balanced with accuracy or speed, faster rcnn has high accuracy while yolo have fast speed. i am thinking to combine them to get a hybrid model to achieve both speed and accuracy

02 August 2024 3,104 0 View

What should be the sample container for the hydrothermal reaction in a microwave reactor at 180 °C for 10 min at the heating rate of 5 °C per minute?

Suggest one of them 1. Teflon-lined stainless steel autoclave: 2. Alumina (Al2O3) ceramic container

30 July 2024 7,326 1 View

Addition of EDTA during the synthesis of copper nanoparticles to prevent it from being oxidized?

I've attempted to use this method to synthesize copper nanoparticles. Copper nanoparticles can be synthesised using a variety of precursor materials. CuSO4, distilled water, NaOH, and EDTA are...

28 July 2024 8,027 3 View

Can I please ask why my samples from anaerobic bioreactor giving me different size PCR product even after multiple runs?

Hi everyone, I have extracted DNA from a biogas bioreactor using Qiagen kit and prep cDNA library then used this library as template to optimize primers for qPCR (taken from papers). Some of the...

23 July 2024 1,329 5 View

Swerling Characteristic functions?

Hello!!! I want to implement the Swerling characteristics functions (CF) directly in MATLAB without using its Fourier integral pairs...the Swerling CFs are actually Laplace Transform of the signal...

23 July 2024 4,925 1 View

Radar Detection Probabilities?

Currently I need to calculate detection probabilities (PD) from RCS data. Beta distribution parameters for this RCS data are calculated and will be used in Swerling0 Equation. The idea is based on...

22 July 2024 2,851 0 View

Why methanol and sulphuric acid used in the analysis of polyhydroxyalkanoates (PHA) by GC-MS?

Why methanol and sulphuric acid, used in the analysis of polyhydroxyalkanoates (PHA) methyl esters by GC-MS? Additionally, why do we typically use non-polar solvents in GC-MS?

22 July 2024 1,210 2 View

Radar Detection Probabilities using beta distributed Scattering Cross section?

Currently I need to calculate detection probabilities (PD) from radar cross section (RCS) data. Beta distribution parameters for this RCS data are calculated and will be used in Swerling0...

22 July 2024 868 0 View

I want to buy Hydrothermal Synthesis Autoclave from any European company. Can anyone suggest any company inside Europe?

Thanks

22 July 2024 1,143 3 View

Optimal condition for depositing FTO target 95:5% using sputter technique?

Hello I want to know about the sputtering condition of depositing FTO from target 95:5%. I tried with RF sputter in pressure 2.5Pa and 100 sccm Ar at room temperature but it showing no...

21 July 2024 1,680 2 View

Convergence of absorbency values to determine the total phenolic content of several solvents?

I used several solvents and measured the absorbency and determined the total phenolic content, but the results were similar after dropping them on the titration curve; What is the reason, please help

17 July 2024 5,151 5 View

What does an additional peak in FTIR between 3100 and 3300 nm affect the quality of the material, benzethonium chloride USP??

I do not know much about FTIR! The material Benzethonium Chloride USP was compared to a reference standard in regards to FTIR, as per the USP testing: Identification B. Infrared absorption (FTIR),...

16 July 2024 6,918 7 View

Asked a separate ways?

Dear all, I have a question regarding ways to separate ammonium nitrate and phosphorus pentoxide？

12 July 2024 3,164 2 View

Does the potentiostat have to be in a fume hood when polymerising the PANI?

I will polymerise Aniline on ITO glass WE, using 1M of H2SO4 and a potentiostat. However, I am not sure if I have to do the electrochemical polymerisation inside a hood. Is it necessary? Is the...

10 July 2024 2,937 3 View

I want to ask why the poly aniline film does not stick to the ITO type substrate knowing that I used the electrodeposition method?

In order to make a polyaniline film, I used the electrodeposition method and set all the conditions, but I noticed that the polymerization process is happening, but it doesn't stick to the...

09 July 2024 2,708 2 View

How to catch or detect Herbivore‐induced plant volatiles from a plant?

I want to know about herbivore-induced plant volatiles from a plant attacked by pests. Is there any chance for me to know what kinds of compounds the plant produces and emits in real time? Thank...

27 June 2024 5,162 5 View

Why does the antioxidant activity increase as the number of OH groups on the phenolic ring increases?

and Why do double bonds reduce it ?

13 June 2024 4,836 4 View

Ow can I remove the fat from mustard seeds in order to extract the bioactive compounds from the de-oiling residue?

I need to eliminate the fat fraction in order to obtain a better product in the next stage of bioactive extraction. By processing the mustard seeds as they are, I obtain a sub-optimal result in...

05 June 2024 3,484 3 View

How exactly do we prepare mobile phases used for LC/MS?

I am doing research that requires using LC/MS to analyse my data. I have very little knowledge of chemistry and LCMS. I have read through many posts and articles, but there is not a single place...

03 June 2024 3,963 5 View

Why is it that I keep on obtaining negative and positive %radical scavenging activity (RSA) in DPPH?

As a context, we have been optimizing the DPPH protocol for our seaweed ethanolic extract. We also use varying concentration points from the various methods in published journal articles, yet none...

28 May 2024 3,097 2 View

Muhammad Hendri Hendri

Dear Umar Bacha

thank you for your answer. Do you have a journal or paper about the method?

I currently have 3 samples; Seaweed and mangrove. Each has an IC 50 : 6, 52 and 62 (strong and very strong).

I am interested to see the type of antioxidant compounds by isolating and purifying them. If possible will be up to the structure of the compound.

very good information. and thank you. I tell u next time. and must need you for assitance.