this is high quality content, some of the best i've seen, please keep this going

Superb presentation !!

Your videos are very well done . Thank you.

this is just amazing, probably the best I have ever seen...plz keep it up. It helps me a lot

this was so relaxing to watch

This video really helped me to understand the Soxhlet process. Thanks!

@Glattuh

7 жыл бұрын

Woww!! Nice to know thatt, thank you¡¡

@Kevin-fn5tk

2 жыл бұрын

@@Glattuh Hola, Cuales fueron tus perdidas ?¿ de hexano

Wonderful sound of sea

This is highly quality! Thank you!

amazing

Great! Well done! Please keep doing more essential oils! And, if you could, think to make a video, in which no solvents are used, so you can give the oil some practical applications.

@Glattuh

4 жыл бұрын

Sure! I am planing to do that video soon!

Thank you , i love this video.

Thank you for this video! This is kick ass!

@Glattuh

4 жыл бұрын

Thank you very much!!

This is so very well made. So lovely, so hypnotic also. I love it. Please keep doing more videos!!! I love the background music.

@Glattuh

7 жыл бұрын

+Juan Melgar Thank you for that!! Im very slow making and uploading videos but I always have new ideas. Check out my other videos if you like!! :D

@juanmelgar152

7 жыл бұрын

I will check them!! Please do more essential oils!!

very helpful

@Glattuh

6 жыл бұрын

Thanks¡¡

Thank you so much!

@Glattuh

4 жыл бұрын

Thank you fro wathing!

buen video compare ojala siga asi

@Glattuh

3 жыл бұрын

Gracias saludos!

Got me subbed

Hi there! What a great video! Keep up the good work! Anyway, is there any alternative for hexane in this case? Ethanol or sth? Thanks

@Glattuh

7 жыл бұрын

Hi thanks¡¡ Wel since here we are extracting triglycerides it is better to use a non polar solvent. Instead, heptane could be use. But I dont really know if extracting with alcohol may work with same yields as here. Thanks for commeting :D

@anhphung365

7 жыл бұрын

Nation Of Our Hobbies thank you so much for giving me more knowledge, keep up your "extracting" work. I like them, i am trying them at home, too!

Is it room temperature or higher temperature did you use in soxhlet process?

Can I know the complete apparatus for this extraction? Because I only have soxhlet apparatus and hexane need to be recovered.

in round flask what type of solvent need to use or we need to use simple distilled water please explain it

Have you figured out the Tare function on your scale yet?

at what temp. did you set the soxhlet and for how much time you did it...please reply

wonderful thank u....it helped a lot i am actually trying to extract oil from algae ...thank u....u made my work easier.....

@Glattuh

7 жыл бұрын

+Purvi Makwana Thats a nice project! By theway... Just curiosity, which algae are you extracting?

@randomscribblings.8540

7 жыл бұрын

Nation Of Our Hobbies ulva....lets see if it gives good results..btw u said solvent amount is essential here if i am using 100 gms of algae then what amount of hexane am i suppose to use.??? tnx for replying.... :-)

@Glattuh

7 жыл бұрын

Well. The amount of solvent used depends on your soxhlet extractor. If it is 100ml apparatus you will need 100ml or a bit more. Mine is 250ml so I had to use like 275-300ml aprox. Is not essential. What I meant to say is that the Soxhlet extractor is very efficient in how many sovent do you use, compared with other techniches... Imagine using fresh solvent with each extraction... An 10 cycles extraction in a 250ml soxhlet extractor doesnt need the equivalent 2,5 liter of hexane if you dont use the soxhlet (dont know if you follow me :S ).

@randomscribblings.8540

7 жыл бұрын

Nation Of Our Hobbies ofcourse i did...thank u... hey just a suggestion can u do videos on biology too...i mean in depth graduation concept

@Glattuh

7 жыл бұрын

Well I do not have too much knowledge about chemistry, wich is the field I study... I wish I had half of that knowledge in the field of biology hahah. Anyway I have two or three future projects related with biology. I hope you will be there to watch :D

How might I get a better idea of which solvents are best for a particular extraction? For example, demonstration of extracting capsaicin from peppers calls for ethanol, while extraction of essential lemon oils uses steam, and extraction of walnut oil calls for hexane. How would I know which to use? Thank you.

@Glattuh

3 жыл бұрын

It depend on what do you want to extract and with which technique basically. You can also extract capsaicin using hexane for example, and extracting fatty oils using petroleum ether. Generally there are a full list of well known and very used solvents. You then have to know their properties and compare them to the compound/compounds you want to extract. For example, for extracting the anthocyanins, watching the molecule itself tells us that probably just ethanol is quite a good solvent for that extraction :D

Is this works for the extraction of moringa seeds?

Please share a video for extraction of oil content from mustard seed.

What do you do with walnut oil?

Hello, I would like to ask if the paper clip has an effect on the resulting oil?

@Glattuh

Жыл бұрын

Hi! Certainly, metals can catalise degradation of organic compounds. But with this experiment I wont say it affects the quality of the product at all. It is quite diluted in solvent and for very short period of time

Thank you for the video. Here i got some questions: 1. What is the difference between N-hexane and Normal-Hexane for the oil extraction? 2. What should be the level of purity of the N-Hexane? and what grade it should be in order to be safe to consume? 3. What other solvents can be used beside N-Hexane? 4. Would it be possible to use Ethanol in this method instead of N-Hexane? 5. Is it possible to extract oil from spices that have very low fat content such as turmeric?

@Glattuh

2 жыл бұрын

Hi thanks for commenting and asking. Let me see: 1. Chemically there is no difference, same molecule. The N stands for normal and means that the alkane is linear, or in other words, non ramificated. I believe there are solvents sold as hexane which contains a mixture of its isomers. 2. Ideally it should be food grade solvent. That ensures its purity for this purposes. 3. All that are non polar such heptane, compressed butane even. 4. No. Ethanol will dissolve the lipidic fraction of the material but more things too. Ethanol is a protic polar solvent, for lipidic fractions nonpolar solvents are the best choice. 5. Yes! But turmeric is more suitable to be used in extractions for its flavour compounds rather than the oil (lipidic fraction). Do not mistake oil with essential oil, they are not the same. With that being said, remember doing this experiment is not meant to encourage people to eat it afterwards, just a demonstration on how the soxhlet works. Bests, Glattuh from NOOH

@sirpfa

2 жыл бұрын

@@Glattuh heyyy. Thank you so much for the reply. It heart warming to see people with knowledge. Please be my mentor till i achieve what i have in mind 😀 1.✅ 2.✅ 3. What does “Non Polar” means? 4. A. What is “Lipidic Fraction”? B. What is “Protic Polar”? 5. Yes? So lets say i have a spice that has 6 grams of fat content per 100 gram. How many % of this 6gram fat i can extract with hexane method? I do have a my own understanding of “oil” and “essential oil” but i prefer to hear you definition of “oil” and “essential” so enlighten me please. Whats wrong with eating the oil that you extracted that you say you font recommend eating it?

@SobeCrunkMonster

Жыл бұрын

@Sir Fa you ever hear the saying- “teach a man to fish”? lol this is the part where google will answer all that and he doesnt have to spend 15 minutes on an isolated question buried in the comments.

🙂👍

Hi! May I know at what temperature you stored the walnut oil? Thank you

@Glattuh

3 жыл бұрын

I stored at RT. After that many years it transformed in some gelatinous paste, I asume by the action of oxygen. It also lost the good aroma it had ;(

Hello i have a question is what solvent are you using? thank you

@Glattuh

3 жыл бұрын

Hexane

what was the extraction temperature? and at what temperature efficiency was highest??

@Glattuh

6 жыл бұрын

I could not measure the temperature in the extraction cylinder but its normally high, something between 60C and the boiling point of the solvent probably. Efficiency is always higher when the temperature increase, but think even if it is low, the soxhlet extractor allows you to do as many cycles as you want so in theory you could always get high yields. I cant say at what temperature the extraction is higher just because it depends on what you are extravting, the solvent and other things. Thanks for commenting :D

Hello. How do I check total fat on processed peanut butter? This apparatus will do? I got a semi auto one for sale in alibaba hit it uses water bath heating. Is 100degC enough?

@Glattuh

4 жыл бұрын

Hi! As far as I know, even in analytical laboratories they use the soxhlet extractor for that purposes yeah! Maybe you have to check for processes specific applied to you material (butter) in terms of sample preparation and so on, by the method is the same yeah! Weigh the flask before and after the extraction (with evaporation of all the solvent) and you have your lipidic fraction weight :D

What is the name of the song at the end?

Hexane is very flammable. It can easily start a fire or explosion from a small spark. What safety precautions do you use?

@SobeCrunkMonster

Жыл бұрын

if you start as a dark elf, they have 75% resistance to fire. other than that, you can use potions of resist fire, exclusive strength or higher, and whether purchased or looted. dark elves can use a lower strength but no lower than standard.

As far as I can tell hexane is safe to use as an extraction solvent for food as long as care is taken to use glassware that isn't contaminated and you make sure to boil off any remaining solvent. Is there something that I'm missing that would make the resulting oil dangerous to consume?

@Kloashut

5 жыл бұрын

It aint always easy to boil off the last traces of solvent nor is it always the best option [thermal decomposition of extract], however applying vacuum could help. I have no personal experience with extracting walnut oil but looking at the msds information, hexane wouldnt my first choice especially if food grade ethanol would do. If you defenitely would need a more apolair solvent and have access to a safe working space & setup I'd prefer butane over hexane healthwise. When in doubt what solvents/chemicals to youse, do check msds from major companies/institutes and compare them objectively.

@Bullshitvol2

4 жыл бұрын

When I worked in a laboratory it was always advised NOT to use hexane unless it is absolutely necessary. A good alternative is n-Heptane, which has almost the same chemical properties but is far less toxic. Another is cyclohexane. Nethertheless I am sure that completely safe solvents like ethanol and ether would work too even if solubility isnt optimal. Soxhlet extractors can make a lot of solvents get to work.

@dimaminiailo3723

Жыл бұрын

Hexane is neurotoxic. But it still be a good choise for extractions

How would you extract rosemary Oil with a soxhlet extractor? Can water as a solvent be used?

@Glattuh

3 жыл бұрын

No! You can extract rosemary essential oil using water but not with the Soxhlet, just a simple steam distillation. With the Soxhlet you could have a concentrate extractt of rosemary using for example ethanol and then using steam distillation to just get the EO, for example. I have a video incoming using this procedure with clove oil :D

Great video! Definetely helped me understand soxhlet extractions. Is there a protocol for this method? And how long would you say it takes to extract oils from walnut and seaweed?

@Glattuh

3 жыл бұрын

Thank you!! I create my own procedures based on other ones I found, usually. Extraction times vary deoending on the volume and dimensions of the extractor itself but maybe 2-4h is pretty common.

Hi i would like to know why it is necessary for ensuring dryness of sample before the start of the extraction and why hexane is used instead of other solvents. also why when soxhlet extraction is used, my measured experimental fat content turned out to be lower than the fat content on the label of my product

@Glattuh

4 жыл бұрын

Water content will affect your data for sure. I asume sample preparation requiers some drying step prior to extraction. There are many factor that can lead you to have lower fat content, most common ones: poor sample preparation (size, dryness, dispersion...), low extraction time and/or bad choice of solvent.

@ngxuanloke362

3 жыл бұрын

@@Glattuh I see. Are there other reasons for the lower fat content?

Do you have a video or more information on Hexane? Is it poisonous or dangerous for the body? Wanted to do some extractions and use the oil for food preparations in some way..... is this possible or a health concern? Maybe steam distillation is a better option for me ?

@SobeCrunkMonster

Жыл бұрын

why would you ask such a question about personal safety in a comment section instead of just googling the product info or an official chemistry safety website of some kind. You people are so strange i swear.

@northshorepressurewashing7615

Жыл бұрын

@@SobeCrunkMonster I like science, probably just brainstorming. ✌️👍

Could you use water instead as a solvent in the soxhlet extractor and achieve the same result?

@Glattuh

4 жыл бұрын

No! Water does not dissolve fat oils (fatty acids triglycerides) so it is not possible. Best solvent for that kind of compounds are hexane or heptane actually, which are non polar solvents. Water is protic and polar so it does not form strong interactions with the oil molecules to solvate them...

What is that thing that holds the soxhlet extractor

@Glattuh

4 жыл бұрын

Hi! Is just a clamp wrapped in paper towel, just to avoid rigig contact between metal and glass

What is the use of the oil if it's toxic to be edible? Why we can't use simple distillation process which is nontoxic.

@Glattuh

5 жыл бұрын

You cant distill a fatty oil... It can be used to make soap for example ;D

are there any food grade solvents that can be used instead of hexane?

@Glattuh

3 жыл бұрын

Yeah, I would suggest heptane. I couldnt get any at the time of filming this video

@RadomKidsareme000

3 жыл бұрын

Wouldn’t hexane be better for evaporation and having less left over in the oil if you are going to consume the oil though?

Hi is it possible to use water as a solvent?

@Glattuh

3 жыл бұрын

No! Water is what is called a polar solvent. Fatty oil are essentially nonpolar so you need a solvent like so to dissolve the oil. Toluene, hexane, heptane, pressurized butane mixtures, petroleum ether... things like that.

Can I use the same process to get dates seeds oil?

@Glattuh

4 жыл бұрын

Yes! It extends to any fatty oil containing material, even cheese ;)

you do realize that your scale has a TARE function, right?

And how can you ensure no remaining hexanes remain bound in the oil? solvents may evaporate but the chemical signature remaining may be TOXIC .

@Glattuh

7 жыл бұрын

Hi¡ Well, there is always the fear about using hexanes, me included. Of course one is not completely sure if hexane has been removed from the oil but the ammount of it remaining in the oil should be minimmun to null after heating the mixture above of its boiling point. I dont remember very well but I think it was at about 120C for a few minutes while filming so yeah, it is expected all of the hexane has been removed after that. On the other hand I have found that n-hexane is a Food and Drug Administration (FDA) approval solvent for edibles. Many things we eat has been extracted with hexane, such many other oils (soy for example). Anyway is not good idea to use any produced or chemichal treated products made in the lab. Thanks for commeting :D

@milkmansteve1

7 жыл бұрын

I appreciate the quick answer. And its good you heated it to fully expel the solvent base , ill have to do more research into the process.

How many hours did the whole process take? I have coffee beans I want to extract for oil and want to know the ideal coffee weight and time

@Glattuh

5 жыл бұрын

I cant remember now but the whole process was done in a lapse of 5-6 hours maybe

@lightreviews1934

5 жыл бұрын

@@Glattuh right...how does 50 g of coffee to 200 mL of ethanol sound tho?

@Glattuh

5 жыл бұрын

Sounds good for me! As long as u still use a soxhlet extractor and grind the beans a little it should be ok. I should say I have never heard of getting a coffee extract ...

@lightreviews1934

5 жыл бұрын

@@Glattuh it's to extract excess oils from already spent coffee grounds haha

@Glattuh

5 жыл бұрын

So yes. By using ethanol you will get something for sure. You will extract all the colour things too i guess

What happens if you use Sassafras bark ??

@Glattuh

3 жыл бұрын

This method is meant to extract fatty acid oils. I guess the sassafra bark is of interest because its essential oil, not its fats.

Dear, is it the same process to extract essential oil or absolut from flowers? Thank You.

@Glattuh

7 жыл бұрын

+Tsovak Voskanyan Hello! I dont understand what do you mean with absolut.. :( But no dont confuse it. Here I am extracting oil, fatty oil. It is composed of tryglycerides and its very different from an essential oil. EO are usually a mixture of lots of organic smelly compounds that are not miscible with water and so they are called "oils", only for that property. If you put flowers and perform a Soxhlet extraction you will extract essential oils but also colorants, chlorophyl and many other things. Best way to get EO? Steam diatillation. You can check out my other videos where I extract lemom and lavender essential oils. Thanks for commenting :D

@tsovakvoskanyan1835

7 жыл бұрын

Nation Of Our Hobbies Thank You very much. I am start-up perfume producer. Usually I gain essential oil by distillation, but I know that there are kind of materials for example jasmine flower which is better to extract throgh this way. Yhe final product from the extractation is absolute. This is the teory that I know, but I haven't done it before.

@Glattuh

7 жыл бұрын

By absolute you mean that ALL of the oil is extracted or...?

@tsovakvoskanyan1835

7 жыл бұрын

here is some information from internet. Like their essential oil counterparts, absolutes are highly aromatic liquids extracted from plants. Absolutes, however, are extracted in a complex manner that requires the use of chemical solvents that are later removed during the final stages of production. A trace amount of the solvent, however, can remain in the final aromatic absolute. Although the amount of remaining solvent is considered tiny in carefully extracted absolutes, steam distilled essential oils are preferred within the scope of holistic aromatherapy. Having said that, absolutes do hold their place within holistic aromatherapy and natural fragrancing applications. As with steam distilled essential oils, absolutes must be used with care, respect and knowledge. While essential oils can offer great benefit when taken internally by those properly educated in the internal application of steam distilled essential oils, absolutes are generally avoided for internal use because of the trace solvent they contain.

@Glattuh

7 жыл бұрын

Oh didnt knew that, that is why I was wondering what you are trying to say haha. I do some reasearch and yes, i could find that absolutes needs to be extracted and not steam distilled but I think i cant help you anymore. There is nothing I could find in my language for that, and for me it looks pretty much as EO, with the only difference they are more "contaminated" with many other compounds. I saw absolutes are more colorful, as I said, due to colorants and other compounds in the plants, for example carotenes. Anyway Im pretty sure you can use this method to produce absolutes yes. What I dont really know is which plant material, solvent and corresponding procedure can be used.

You warn not to eat the oil due to the resudual of hexane. It gets me wondering how olive oil could be considered organic if it's got residual solvents in it, such as hexane. Can you show us other extraction processes where the oil will be safe for human consumption?

@Glattuh

5 жыл бұрын

Hi¡¡¡ First of all, let me thank you for all the comments in the videos, it means a lot¡ About the oils, yes I can ahaha. Many oils we consume are extracted using hexane, as it is aproved by the FDA (Class II solvent which means it can be used but it has inherent toxicity) as a safe solvent for extracting fats and lipidic contents. Even though it is considered to be safe used as solvent, it is indeed a bit dangerous. It is quite volatile and so it is flammable but, when inhaled, it can produce some neurological diseases with time. I am not too expert in metabolisis of this things when they enter the human body, I just, as a chemist, read the security and danger phrases. I often think why it is aproved by the FDA being so dangerous. With that being said, I could eat my oil without noticing any danger as probably and as I said, many things we eat in our everyday consuming may have been in touch with hexane. But there is something which is key and is the next: Just compare a industrial standarized method, with all the research that entails, animal tests, studies and so on... with my amateur and more lablike method of extraction.... It probably dont differ so much but it is still me extracting this in my home.... I guess you understand now haha. I have no guarantee that I dont have hexane left in my oil. Maybe I can speak with the university to see if I can perform some analysis and see if it is some hexane left, but thats another serious project ahaha. I can only thing now in other extraction method and it is called cold pressing. It just consists in applying pressure to the material and getting the oil out of it. Not so much efficient as the chemichal method but much safer and cheap I guess. Thanks for commeting ;D

@Glattuh

5 жыл бұрын

Edit, n-Hexane is not approved by the FDA as a safe solvent but it is know that, due to its high volatility, no residues are found in extracts after removing the solvent. Because of that it is used in quite a lot of things, but mainly in seed oil extraction.

i like this video but i wish you talked more to explained because it hard to read while being impressed by what happening on the video

@Glattuh

4 жыл бұрын

First of all... thanks for commenting!! Actually I just uploaded the last video with subtitles. I bought a good microphone and so I will be doing voiceovers for the next videos from now!!! Not many people knows this by this time so feel lucky (along with the people reding this comment hheh). I decided to start giving some voice because of that exact thing you said. In adition I am feeling like I need to give you my viewers so much information that it is no longer viable to write. Also I loss lots of time arranging the subtitles for each video so... Voice is coming :D

Is this process applicable for almonds oil extraction?

@Glattuh

5 жыл бұрын

Sure!!! Im pretty sure it will work fine!

@BulletReapz

5 жыл бұрын

Well, I am glad to hear that . I am actually planning this for my college graduation project..! Thank you for your information..!

@Glattuh

5 жыл бұрын

You are welcome!! If you can better use heptane instead of hexane, much better choice (for health)

@BulletReapz

5 жыл бұрын

Nation Of Our Hobbies. I saw your comment above saying that hexane is authorized by the FDA for edible usage, why would you recommend heptane as a healthier one?

@Glattuh

5 жыл бұрын

Although it is aproved by the FDA, it is not guarantied if you use it in lab conditions and so. Hexane is mich more harmful than heptane. On the other hand I wont recommend eating any thing produced in the lab, even if you just use ethanol or water because glassware and the place where you work has touched lots of diferent chemichals. In the industry hexane is removed completely I guess by other techniques so... Its just diferent!

will this oil be edible ?

@Glattuh

4 жыл бұрын

I do not recomment that since it has been in contact with hexane ;(

Can this process work in extracting citrus essential oil?

@Glattuh

5 жыл бұрын

Hi¡ It will owrk for sure yeah but yopu will extract many other things too. For extracting citrics essential oils better use steam distillation. Here you can se mee doing that exact thing with lemons ;D kzread.info/dash/bejne/e3dk07uhgZW-fso.html

@patriciaantoinettesantos4133

4 жыл бұрын

@@Glattuh why is steam distillation better? In this process is steam distillation also better?

@Glattuh

4 жыл бұрын

@@patriciaantoinettesantos4133 It is not better. They are different processes for different compounds. Do not confuse essential oils with fatty oils. Walnuts and many other seeds have high content in fatty oils, which whom we cook and fry things. Essential oils are much more expensive and volatile and are used for perfumes. So: Essential oils -> Steam distillation Fatty oils -> Extraction with solvent or cold pressing

can i use this process for soursop seeds?

@Glattuh

5 жыл бұрын

Hi¡¡ I didnt know about that exotic fruit but after a quick research, yes, it can be used to extract the oil from the seeds. Just one observation I made, better try to let the seeds dry a little bit as I guess the fruit has very high water content, in order to have a better extraction performance :D

@user-nt7oy6jn9f

5 жыл бұрын

Nation Of Our Hobbies thank you! :) And by the way, since we are students and our facility doesn’t have a soxhlet extractor, do you think boiling the seeds and the hexane together in a flask would be effective? Then after that just filtrate it and use the distillation apparatus to separate hexane from the oil? Also, what is the ideal number of extraction cycles? Is it also 6?

I did the same procedure but I got 31% oil content! What is the reason of that

@Glattuh

5 жыл бұрын

Hi! Prpbably the starting material. It may differ depending on the walnuts you used. Thanks for trying my procedure!

@BulletReapz

5 жыл бұрын

Ok , but I didn’t use the simple distillation setup. Is it necessary ?

@Glattuh

5 жыл бұрын

I used that to recover the solvent used in the extraxtion and get the lipidic fraction, so yes it is necesary. Ideally a rotovapor is used but I dint have one so Iused the simple distillation. Rotovaps use motion and vacuum to accelerate the elimination and recovery of the solvent. How did you perform the experiment so?

@BulletReapz

5 жыл бұрын

I recovered hexane from the extraction chamber after several extraction cycles. Later on, i used water bath to evaporate the remaining hexane from walnut oil

Hola, me suscribí hace poco. Quisiera hacerles algunas preguntas. Es posible por correo? Soy de Argentina

@Glattuh

3 жыл бұрын

Gracias por suscribirte! En el enlace que te paso, dentro de la sección de detalles, encontrarás la dirección de contacto. kzread.infoabout

Now that I viewed it a second time I saw you essentially extracted the white coating of the paper clips. Or do you used different already blank clips in the footage? This would be concerning as addition to the not so safe for human consumption.

@Glattuh

4 жыл бұрын

Only metal clips were used!

@wernerhiemer406

4 жыл бұрын

@@Glattuh OK on the table they looked white.

can I know the name that you use to break the walnuts?

@Glattuh

4 жыл бұрын

Mortar and pestle? I dont know exactly what do you mean

@virginiacalzada1226

4 жыл бұрын

Nutcracker?

The use of a Soxhlet top for extracting the goodies is senseless, I'm afraid. You use a Soxhlet if you want to extract some unwanted byproduct, e.g. fat, from a heat-sensitive material.

Hi, nice video. Is it possible to contact you by e-mail?

@Glattuh

4 жыл бұрын

Sure! You can find mine in the description, inside the channel :D

@cocopcsi2663

4 жыл бұрын

@@Glattuh thanks

I am shocked you are distilling hexane without a seal and vent tube. Are you trying to teach people how to make fuel air bomb?

kzread.info/dash/bejne/oZyTrsRpfNHLadY.html kzread.info/dash/bejne/ZZWlmsuDhdO9Zdo.html kzread.info/dash/bejne/oY2jx6-yqLvgYMo.html kzread.info/dash/bejne/X354ktiapZbWnqQ.html kzread.info/dash/bejne/d5-KxrePermtmbw.html kzread.info/dash/bejne/lWqWttt7is3KgJs.html kzread.info/dash/bejne/i36V1a-nd6Wzlqg.html kzread.info/dash/bejne/hqKmo7iSd8a6dKw.html kalan videolar

Ok. So google tare scales. Less math.