How do I calculate the % yield of an isolated compound from plat material?

More Alhassan Mahama's questions See All

What is (are) the best theoretical framework to assess the impact of climate change on food security and sustainable water demand?

18 September 2020 9,961 9 View

Is there any recommended dose range for determining the invivo anticancer activity of a new compound?

I isolated a novel compoud from bioactive extract. I need to know the most appropriate dose range for the invivo bioassay.

13 September 2020 723 6 View

How do I justify the sample size for a study in which I am inviting all eligible respondents to participate?

Dear all, I am conducting a pre-test post-test quasi-experimental study to evaluate the effectiveness of a training program for nurse preceptors. I will take baseline data before the training...

06 September 2020 5,409 5 View

How to use word embedding (i.e., Word2vec, GloVe or BERT) to calculate the most word similarity in N words by Python?

I am trying to calculate the semantic similarity by inputting the word list and output a word, which is the most word similarity in the list. E.g. input: list = ['portugal', 'spain', 'belgium',...

23 June 2020 5,365 9 View

Does anyone know of any scholarship opportunities in the Gulf?

Please, anyone here knows of PhD petroluem Engineering or Computer Science and or Engineering scholarships anywhere in the middle East or Gulf States. like Bahrain, Qatar,Oman or UAE. I will be glad

24 October 2019 2,606 3 View

Does institutional affiliation influence Editors decision on manuscript?

Considering some papers published by high impact journals and those rejected (personal experience). I have the impression that ones institutional affiliation influences editors decision on whether...

20 November 2018 1,433 21 View

How do I calculate the % yield of an isolated compound from plat material?

I want to know the mathematical relation in calculating the % of an isolated compound from plant material of a know mass. eg. I started with 250 g of plant material and isolated a flavanoid of...

31 May 2018 7,932 2 View

What is vehicular Interaction? How can it be measured on roadways?

Road safety normally hinges on the environment, roadway and vehicular factors. The interaction between vehicles is largely ignored in road safety analysis. How can we factor vehicular interaction...

19 April 2017 854 3 View

Maximum spacing of shear stirrups according to the ACI 318 Code

When the Vs is < 2*Vc , which is the case most of the times, the code require that Smax be calculated as the lesser of three values, one of them is mostly controlling that is d/2. The code...

01 January 1970 6,395 1 View

For you, what is reflective teaching?

I am interested in hearing your veiw on this topic.

01 January 1970 4,398 50 View

After a reference from Int J Body Compos Res, can any body help?

Hi, I am after the reference below, my library says it cannot obtain a copy either locally or internationally, any help appreciated! Chris Wang ZM, Heshka S, Wielopolski L, Pi-Sunyer FX, Pierson...

03 March 2021 6,193 1 View

Any research papers for extraction of nutrient deprivation on macroalgae? Analysed by HPLC-UV and GC/MS. Possibly from macroalgae genus Rhizoclonium?

I am doing my thesis on the nutrient deprivation on the macroalgae Rhizoclonium sp. I will be analysing the levels over a period of roughly 5 days by HPLC-UV and GC/MS. I will be using seawater as...

28 February 2021 6,477 1 View

Is there any published or unpublished statistics on dropout rate (Dose1 to Dose-2) for Covid-19 vaccination in India, US, UK or any other country?

Are there any published or unpublished statistics or papers on the dropout rate (Dose1 to Dose-2) for Covid-19 vaccination in India, USA, UK, or any other country where vaccination has started at...

28 February 2021 4,237 1 View

Steps to calculate activation energy by coats & redfern method?

I'm a chemistry student and I'm researching the kinetic degradation of mixed plastic waste. I'm having trouble calculating the activation energy by the coats & Redfern method. The data that...

24 February 2021 974 1 View

Any Differences in COVID-19 vaccines?

Are there any differences (outside of the clinical trials that led to their EUA) observed in the rate of infection among those who have received the Pfizer vs Moderna vaccine since the mass...

22 February 2021 9,727 6 View

How to find natural frequency of a bridge from vehicle induced vibrations?

i have frequencies of bridge that are effected by mass of vehicle. the problem is when any vehicle pass the bridge it would add the its mass to the bridge mass ultimately mass of the bridge will...

22 February 2021 10,004 3 View

Did any urologists have experienced with retroperitonel leiomyosarcoma from renal vein with IVC enxtension?

Recently, we got one lady with right side retroperitoneal mass involving renal vein and extends into IVC upto diaphragm. CT suggested leiomyosarcoma. Right kidney separately seen from mass and it...

19 February 2021 6,873 1 View

How can I import .sav file into LISREL?

I've just downloaded free trial version of LISREL 10.3 but I got stuck with importing .sav (IBM SPSS 25.) file. I mainly followed the steps of this video...

15 February 2021 752 2 View

How do you interpret theoretical vs. experimental reaction orders with respect to a reactant?

I recently came across a paper focusing on the hydrodeoxygenation of oxygen-containing compounds. The paper linearized the rate equation in order to determine the experimental reaction order with...

14 February 2021 8,254 2 View

Can i use the " weight moisture" ( humidite ponderale in French) of plants to describe their efficiency in using water?

Weight moisture is : water content/ dry weight , if for example it is 4 it means that this plant have for each 1gam of dry mass 4 grams of water. can i use this to interpret the plant use of...

14 February 2021 5,784 1 View

Gerhard Martens

My dear Alhassan,

it is simplest %-caclulation:

your % yield is calculated via the ratio of extracted mass (here 0,5mg) divided by the primary starting mass (here 250g) times 100:

%yield = 100*0,5mg/250g = 100 * 0,5*10-3*g/(250*g) = 2*10-4

Alhassan Mahama

Thank you so much for the insight given me in the calculation.