Hi, great video. I am attempting to do this for SDS-PAGE gels rather than WB ones. I am trying to compare Rubisco content and purity from various treatments. However, unlike WB where you probe for a target protein (e.g Rubisco), and get one nice band, my SDS-PAGE gel has many bands other than my POI. In this case, where would I subtract the blank from as there are no 'empty' spaces in the lanes? I thought of taking three measurements at the top of the gel (not in the lanes) and taking an average of this as the background. Do you have any suggestions? Also, I am not sure about the case where there are multiple bands per lane and the fact that I want to find out relative purity and compare the relative quantity between treatments (using a standard curve generated from Rubisco quantitation standard) if I should use the integrated density method or the NIH (AUC) method? Please give me any tips and suggestions. Thanks!
@adwoabiotech4 күн бұрын
Original Paper Electrophoretic Transfer of Proteins from Polyacrylamide Gels to Nitrocellulose Sheets: Procedure and Some Applications: www.pnas.org/content/pnas/76/9/4350.full.pdf
@adwoabiotech10 күн бұрын
References to deepen your knowledge : Books "Principles of Instrumental Analysis" by Douglas A. Skoog, F. James Holler, Stanley R. Crouch This book provides comprehensive coverage of analytical techniques, including the use of internal standards in various instrumental methods. ISBN: 978-0495012016 "Quantitative Chemical Analysis" by Daniel C. Harris This text covers the principles and practices of quantitative analysis, including the application of internal standards in different analytical procedures. ISBN: 978-1464135385 "Handbook of Analytical Techniques" edited by Helmut Günzler and Alex Williams This handbook includes detailed discussions on various analytical techniques and the use of internal standards to improve data quality. ISBN: 978-3527296539 Articles and Papers "Use of Internal Standards in Quantitative Analytical Chemistry" by Alan G. Marshall and Bruce S. Meyer Journal of Chemical Education, 1977, Vol. 54, No. 10, pp. 640-643. This article provides an overview of the principles and applications of internal standards in quantitative analysis. DOI: 10.1021/ed054p640 "The Role of Internal Standards in Quantitative Analysis by Mass Spectrometry" by Chris B. Stack, David Muddiman Analytical Chemistry, 2011, Vol. 83, No. 12, pp. 4649-4660. Discusses the use of internal standards in mass spectrometry to enhance quantitative accuracy. DOI: 10.1021/ac200160w "Application of Internal Standards in Chromatographic Analysis" by James W. Taylor Journal of Chromatographic Science, 2002, Vol. 40, No. 6, pp. 292-299. Explores the use of internal standards in chromatographic methods to improve quantification. DOI: 10.1093/chromsci/40.6.292 Online Resources National Institute of Standards and Technology (NIST) - Analytical Chemistry Division The NIST website provides guidelines and resources related to analytical methods, including the use of internal standards. NIST Analytical Chemistry Division International Union of Pure and Applied Chemistry (IUPAC) - Compendium of Chemical Terminology (Gold Book) The IUPAC Gold Book offers definitions and explanations of terms used in analytical chemistry, including internal standards. IUPAC Gold Book Practical Guides "Quantitative Analysis Using Internal Standards in HPLC" by Jürgen Hochstrasser A practical guide on the application of internal standards in high-performance liquid chromatography (HPLC). Available online as a technical note from various chromatography companies.
@Braque2Brook15 күн бұрын
Hi! What temperature do you usually spin the sample at? Room? 4ºC? Thank you so much!
@adwoabiotech12 күн бұрын
Room temp is recommended.
@Braque2Brook11 күн бұрын
@@adwoabiotech Thank you!
@shivarajakumara361920 күн бұрын
The teaching methodology is not good...
@adwoabiotech19 күн бұрын
Oh sorry to hear that it wasn’t clear for you, but thanks for the feedback. Will keep it in mind for future tutorials. In the meantime you can let me know what was not clear.
@shivarajakumara361919 күн бұрын
@@adwoabiotech background music... Took much of cartoons are not good...
@kamilaalicja274425 күн бұрын
bullshit, not helpfull at all
@adwoabiotech24 күн бұрын
LOL! I appreciate the feedback. I will try to make future videos clearer. Was there any question you had in particular that I could try to answer for you?
@Dinka-EnglishTV5Ай бұрын
I did DNA extraction by method of Maxi prep for the first time. I didn’t even understand the others steps. I’m willing to learn more methods and other steps.
@adwoabiotechАй бұрын
It takes time to digest all the information but repeat it several times and it'll be locked in. The Maxiprep allows isolation of larger amounts of DNA. What was your sample source for the extraction?
@Dinka-EnglishTV5Ай бұрын
@@adwoabiotech we were extracting Plasmid DNA of bacteria E.coli
@marcoromo9252Ай бұрын
Greetings from America. I love your teaching approach Adwoa. Your channel is one of my favorites! Can you create a video similar to this showing how internal standards are used for a calibration curve. From what I understand ratios are key for the internal standard approach. Any information on this would be much appreciated!
@adwoabiotechАй бұрын
Hi and thanks for the very motivating comment! I will certainly do that. Check back in about a week.
@marcoromo9252Ай бұрын
@@adwoabiotech thank you! That would be great
@adwoabiotech11 күн бұрын
@@marcoromo9252 The video that you requested is now live! Thanks for your patience and please let me know if anything is unclear.
@Couti912 ай бұрын
Hello Doctor! I was diagnosed with HTLV-1, I have hyperthyroidism, osteoarthritis in my spine and osteoarthritis in my knees (I had surgery on my spine and a knee replacement). Do these bone problems and hyperthyroidism come from HTLV-1? I am 64 years old and female! A hug from Brazil!
@adwoabiotechАй бұрын
Hello! Apologies, I'm not a doctor. I am not aware of these conditions being caused by HTLV-1, so please consult your doctor. Here's a link to a video discussing the causes of hyperthyroidism: kzbin.info/www/bejne/nqnde6t5hLOrp80 I pray you find the underlying cause, so that you can find curative treatments. All the best!
@freeseyyah15472 ай бұрын
I want to ask a question. My English skill is not enough to understand . It could be silly question sorry . I am trying to learn statistics . I would love to do statistics of my researches my own . I want to do a research about "Mortality and complications after percutaneous endoscopic gastrostomy)PEG): a retrospective one-centered study" My universe is 908 PEG . After excluding criterias I dont know how much will stay but probably around 600 cases I want them all. How can I calculate for that retrospective research sample size. 1-After PEG minör complication rate : %18-38 major complcation %2-4 2-After PEG mortality rate in 30 days : %3-23 I want to do multiple regression analyses . I have 2 dependent variables "mortality after peg " and "complications after peg" I have 31 independent variables. I do calculate at GPower . F test- Linear multiple regression : fixed model, r2 deviation from zero: A priori Effect size 0.15 , a 0.05 B: 0.95 number of predictors 31 Sample size 264. ***My question is this how can ı find effect size? Do you suggest me any other advice for my research sample size calculate ? Thanks for helping and sorry for baby english and long question.
@adwoabiotech2 ай бұрын
Hi! As I am not a statistician, I cannot fully help. However, based on what I've understood of your question, you may be able to calculate the odds ratio for the percutaneous endoscopic gastrostomy vs. those without the intervention. This would give you the effect size parameter to input into the sample size calculations. For the regression analysis, perhaps a correlation coefficient would be the best way to assess it's effect. Please confirm theses approaches with a qualified statistician :)
@muffinman12 ай бұрын
Isolation of CTCs are also another popular use for SepMate/Leucosep tubes.
@adwoabiotech2 ай бұрын
Good to know, but what does CTC stand for in this context? Thanks.
@muffinman12 ай бұрын
@@adwoabiotech circulating tumor cells. A popular prognostic biomarker. Look into cellsearch assay.
Additional Essential Cell Culture Calculations (making up media and determining amount of drug treatment): kzbin.info/www/bejne/ZmXcZXeiZdqHd5o
@Wendy-pz3xn3 ай бұрын
Can a man be a carrier and not even know?
@adwoabiotech2 ай бұрын
Hi Wendy, Yes, most individuals infected with HTLV-1 remain asymptomatic carriers throughout their lives. Only, a small proportion of infected individuals develop HTLV-1-associated diseases.
@Wendy-pz3xn3 ай бұрын
Can this virus 🦠 cause CML?
@adwoabiotech2 ай бұрын
I'm not sure about this one but the two main clinical conditions associated with HTLV-1 are adult T-cell leukemia/lymphoma (ATLL) and HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP).
@nanaobben51663 ай бұрын
Excellent ❤
@im_slate3 ай бұрын
Thanks
@adwoabiotech3 ай бұрын
Reference 2): Sequencing artifacts derived from a library preparation method using enzymatic fragmentation: journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0227427&type=printable
@adwoabiotech3 ай бұрын
Reference: DNA Library Preparation Methods for Next-generation Sequencing: Tone down the bias www.sciencedirect.com/science/article/abs/pii/S0014482714000160
@lloviset4 ай бұрын
Thanks!
@adwoabiotech4 ай бұрын
You're welcome, mate.
@Shiv-vs8oy5 ай бұрын
here we join the base with a line manualy which is error prone for the area calculation
@adwoabiotech4 ай бұрын
Yes, that does sound error prone.
@adwoabiotech5 ай бұрын
References: 1) High rhesus (Rh(D)) negative frequency and ethnic-group based ABO blood group distribution in Ethiopia: www.ncbi.nlm.nih.gov/pmc/articles/PMC5530478/#:~:text=In%20Africa%20and%20Asia%20the,negative%20phenotype%20is%20even%20rarer. 2) Chapter 2: Blood group antigens are surface markers on the red blood cell membrane by Dean L. Bethesda (MD): National Center for Biotechnology Information (US); 2005. www.ncbi.nlm.nih.gov/books/NBK2264/#:~:text=Blood%20group%20antigens%20are%20either,the%20transfer%20of%20sugar%20units. 3) Blood groups (Better health channel VIC health) www.betterhealth.vic.gov.au/health/conditionsandtreatments/blood-groups# 4) Blood Groups and Compatibilities www.rch.org.au/bloodtrans/about_blood_products/blood_groups_and_compatibilities/
@alhassanmohammedawal38515 ай бұрын
Hi Maame Adwoa, please i have a malaria vaccine to analyse the protein content. I have the Bradford Protein kit from thermofisher and the Albumin standards for the curve. can you help me with how to go about it?
@adwoabiotech5 ай бұрын
Hello Alhassan, You will need make a 6-point serial dilution of a protein standard for which you know the starting concentration. e.g. Bovine Serum Albumin (BSA). You will then measure the absorbance of that standard against your protein of interest, in this case, your vaccine. If you have a plate reader, it may be also be easier assay it with that instrument (provided you have enough reagent for the required plate reader vol., typically 200ul). I have a video on here, that discusses how to approach protein determination so I'll link it below.
@adwoabiotech5 ай бұрын
Standard Curve: kzbin.info/www/bejne/g4G0pWh6mtKtoK8
@alhassanmohammedawal38515 ай бұрын
i tried to contact them but they will not response
@kalyanirajalingham12865 ай бұрын
Very nice presentation
@adwoabiotech5 ай бұрын
Thanks :)
@aondohembanege95515 ай бұрын
Hi, thanks for the video. Please, I have a question: I will like to ask a question about cell treatment experiment with a test drug for 72 h. In such an experiment, do I have to add my drug once and incubate for 72h then check the cell viability or I have to remove the drug solution and replace with the same drug and concentration after each 24h to avoid wrong readings due to degraded drug in wells or evaporation? Please any other person reading the comments can also reply me if you have the correct answer to my question. Thank you
@adwoabiotech5 ай бұрын
The usual strategy is to leave the drug on for the entire 72hrs and assess following the designated time. However, it depends on the stability of the drug that you are assessing. If you know that your drug of interest is unstable and is completely degraded after say, 24hrs, then it may be wise to replenish.
@aondohembanege95515 ай бұрын
Thank you very much for your timely reply. The information will add to my considerations and subsequent decision @Adwoabiotech
@phuonglannguyen65915 ай бұрын
hi thank you for your explaination. I have a question, if I measure dose dependency, in specific, I measure basal value of each well for 10 mins, and then add agonist and measure for 30 mins more. Then its supposed to have many points, then how should i choose value to make Z' factor?
@rayshoesmith6 ай бұрын
I am a complete novice with ELISA but i need to run some blood tests that the UK does not offer, im going to buy all the equipment to conduct the following tests: MSH TGFB1 VEGF MMP9 C3A C4A Can you recommend a good book for the protocols and what elisa tests would be appicable for these tests (dircect/indierct etc.....) The top one is melanocyte stimulating hormone and i need to see a quantity not just sample presence in all of them Thank you, great videos
@adwoabiotech6 ай бұрын
Hi @Rayshoesmith In terms of whether you perform a direct or indirect test, this will depend on how abundant the target is. If you suspect very low expression levels, then go for indirect. Regarding the melanocyte stimulating hormone where you need to see quantity not just presence, you will need to include a 6 or more point standard curve. This will help you report quantities. Regarding a book: I found this one online: ELISA: Methods and Protocols (Methods in Molecular Biology, 1318) 2015th Edition www.amazon.com/ELISA-Methods-Protocols-Molecular-Biology/dp/1493927418 All the best!
@rayshoesmith6 ай бұрын
@@adwoabiotech you are an absolute angel! Thank you for taking the time to reply, I really appreciate you ❤️
@archanal24946 ай бұрын
How do you adjust the gain?
@minhhao50316 ай бұрын
Thank you so much for this practical lecture for university students like me who cannot have the condition and biotechnological facilities to practice. I wish you all the best in 2024, Madam!
@adwoabiotech6 ай бұрын
Glad it was helpful!
@benabuindetiemo31836 ай бұрын
does the volume of the samples have to be constant
@adwoabiotech6 ай бұрын
Without having more details about which volume you are referring to, I will still say 'yes', because volume affects concentration.
@anassoub60886 ай бұрын
Really helpful thank you !
@adwoabiotech6 ай бұрын
Happy to hear.
@adwoabiotech7 ай бұрын
Why do we need to be able to do such calculations? In order to maximize all available storage space most solutions are stored in a concentrated form (known as stock). These solutions are then diluted to the required strength as and when required. This also means the same solution substance may be used for a different range of needed concentrations.
@drtomiomoya7 ай бұрын
Thanks for the information. Love it
@adwoabiotech7 ай бұрын
You are welcome @drtomiomoya.
@user-ro5gh9ez5c7 ай бұрын
7:36
@Scotto_desu7 ай бұрын
Great video 👍
@adwoabiotech7 ай бұрын
Medaase / Thank you.
@user-zq7zb6oo1n7 ай бұрын
keep up the goodwork. I hope someone there's multiple of someone like you in this world. You keep the world turning
@axox117 ай бұрын
Thank you! ❤️
@adwoabiotech7 ай бұрын
You are welcome.
@adwoabiotech7 ай бұрын
What is a good H-index? Hirsch suggests that after 20 years of research, an h-index of 20 is good! It means that you have 20 publications with at least 20 citations. 40 is outstanding, and 60 is absolutely exceptional.
@user-ou1lk1uf6u8 ай бұрын
I analyzed your channel and I was impressed to see your video quality. your video thumbnail is very eye-catchy. However, you are not getting proper views and subscribers. Below we found some problem for your channel - Your video title is not SEO friendly Don't have proper tags and keywords Don't have meta tags for video ranking Descriptions are not optimized Please fix this problems to get more views and subscribers
@adwoabiotech7 ай бұрын
Ok thanks for letting me know 😆
@jacquimurphy43948 ай бұрын
I struggled to listen to it due to the music which is a shame as sounds like it may have been useful 😢
@adwoabiotech8 ай бұрын
The music in this video is barely audible. You may have had another browser opened, that was playing music?
@albertofabbri15437 ай бұрын
@@adwoabiotech Sorry but I do not agree with you. The music is not as low as you say and it makes harder to understand what is being said.
@adwoabiotech2 ай бұрын
@@albertofabbri1543 Ok, thanks. I appreciate you letting me know. I will keep it in mind for future videos.
@adwoabiotech8 ай бұрын
Other terms used to describe water quality in the lab includes: MQ/MilliQ water for type 1 water; Elix water for type 2 water and RO or demineralised water for type 3. Note that distilled water is water that is clarified through heating the water until it enters vapour form, and then cooling the water back to liquid form. Most labs do not use this method of clarification, preferring to use reverse osmosis, due to its greater efficiency.
@bastonmark16268 ай бұрын
Of course it is obvious that we do not appreciate qualities and the cost that it rather saves.
@adwoabiotech8 ай бұрын
It seems common sense once you learn it, but before then, it's not intuitive.
@Nofux2give8 ай бұрын
you saved my life man
@adwoabiotech7 ай бұрын
Glad to hear.
@daryaaleksandrova429 ай бұрын
Thank you!!
@adwoabiotech9 ай бұрын
You're welcome!
@adwoabiotech9 ай бұрын
Fun fact: a typical adult has a blood volume of approximately 5 liters. Females and males have approximately the same blood percentage by weight.
@dd20539 ай бұрын
Hi Adwoa Could you explain the interpreting Elisa result a bit more Do you have one-2-one tutorial?
Note: some labs avoid using antibiotics in their Media as they don't want to risk masking low level infection or worse, facilitate the emergence of antibiotic resistant strains. Get more comprehensive knowlege via this article from pubmed: www.ncbi.nlm.nih.gov/pmc/articles/PMC7149418/pdf/main.pdf
@enriquecorona318410 ай бұрын
PBMC will be used to assess viral infections, thanks.