Chemistry of Coffee - How coffee keeps us awake ?rita martin
Caffeine present in coffee works by changing the chemistry of the brain . It blocks the action of a natural brain chemical, adenosine, that is associated with sleep
Describes the process of making tea, the history of tea, the health benefits in a cup of tea, different types of tea and different ways of drinking tea in different cultures. It is an informal presentation I gave to my local rotary club
Black tea has become a worldwide occurrence. In cafes and coffeehouses, tea houses and fashionable bistros, the black tea has turn into a preferred drink of tea drinkers about the world. The exclusivity of the black tea dishonesty in the processing-a method that helps to give the beverage its magnificent flavor and consistency. Very dark tea may also be especially with added flavor or scented.
Chemistry of Coffee - How coffee keeps us awake ?rita martin
Caffeine present in coffee works by changing the chemistry of the brain . It blocks the action of a natural brain chemical, adenosine, that is associated with sleep
Describes the process of making tea, the history of tea, the health benefits in a cup of tea, different types of tea and different ways of drinking tea in different cultures. It is an informal presentation I gave to my local rotary club
Black tea has become a worldwide occurrence. In cafes and coffeehouses, tea houses and fashionable bistros, the black tea has turn into a preferred drink of tea drinkers about the world. The exclusivity of the black tea dishonesty in the processing-a method that helps to give the beverage its magnificent flavor and consistency. Very dark tea may also be especially with added flavor or scented.
Coffee : Different Kinds of Coffee & Styles of CoffeeMudit Grover
• Coffee :
Different Kinds of Coffee & Styles of Coffee
• Made By:
• Mudit Grover (18)
• Coffee
• Coffee is a brewed beverage.
• Prepared from the roasted seeds of an evergreen shrub of the genus Coffea.
• Mainly cultivated in India, Latin America & South America.
• Methods of Coffee Preparation
• Brewing
Process of infusing the coffee beans or coffee powder with hot water for a specific period of time.
Brewed coffee, if kept hot, will deteriorate rapidly in flavour.
Reheating such coffee tends to give it a "muddy" flavour.
• Vacuum Pot
Also known as vac pot, siphon or syphon coffee maker.
Excessively complex for everyday use.
• French Press
• Also known as a press pot, coffee press ,coffee plunger.
• The best and convenient method for brewing the coffee.
Percolator Method
• Continually cycling the boiling water for the process of brewing.
• May recirculate already brewed coffee through the beans.
• Types of Coffee
• Caffè Americano(America)
– Prepared by adding hot water to espresso.
– Consists of a single or double-shot of espresso combined with between 30 - 470ml of hot water.
• Café au lait
– Traditionally the French way of preparing 'coffee with milk' both at home and in Cafés in Europe.
• Caffè latte(Italy)
– A portion of espresso and steamed milk.
– With a little foam on top.
• Café mocha
– A variant of a caffè latte.
– Typically one third espresso and two thirds steamed milk.
– A portion of chocolate is added, typically in the form of a chocolate syrup.
• Video
• Cappuccino(Italy)
– Prepared with espresso, hot milk, and steamed milk foam.
– Traditionally served in a porcelain cup.
• Espresso(Italy)
– A concentrated beverage brewed by forcing a small amount of nearly boiling water.
– Acts as the base for other drinks.
– Has more caffeine per unit volume than most beverages.
• Ristretto
– A very "short" shot of espresso coffee.
• Instant coffee
– The coffee is dehydrated into the form of powder or granules.
– Can be rehydrated with hot water to provide a drink similar.
– Brand of instant coffee
• Nescafe
• Moccona
• Folgers
• Major Coffee Producing Countries
• South America:- brazil, Columbia, Venezuela
• Africa:- Kenya, Ethiopia etc
• Central America:- costa rica, Jamaica, mexico etc.
• Asia:- India, Indonesia.
• Learning Outcome
• We learnt about the different methods of preparing coffee.
• Different styles of coffee.
• Coffee producing countries.
• Bibliography
• Video made from Nibs.
• Food & Beverage Service – Bibekananda Kanjilal
• www.google.com
• www.wikipedia.com
• www.britannica.com
Read and share with your tea loving friends and staff to spread the love and knowledge of tea. Learn the basic varieties and glean some advanced details about origins and health benefits.
The Brief Introduction of Chinese Tea Culture
Made by me (Betty Krystal Yang)
And also Making Procedure of Different categories of tea
Credit to Krystal Yang
Mail: bettyyangkris@gmail.com
Chinese tea drinking culture has for long been just a hear say especially regarding its benefits. having experienced it, i present to you the various types of Chinese tea you can enjoy usually available from the near by supermarket.
A presentation carefully introduced Chinese tea & culture, including Chinese tea history,main tea types, major tea producing areas, famous Chinese teas, their taste, origin, features, expounded on Chinese tea art, tea ceremony and Characteristics and spiritual content of Chinese tea culture. It also showed the benefits and taboos of drinking tea, how to store tea and how to recycle tealeaves.
A presentation carefully introduced Chinese tea including main tea types, famous Chinese teas, their taste, origin, features. It also showed the benefits and taboos of drinking tea, how to store tea and how to recycle tealeavs.
Class 12 Chemistry Investigatory Project Work, Practical- Determination of Ca...Kendriya Vidyalaya
Class 12 Chemistry Investigatory Project Work, Practical- Determination of Caffeine in Tea Samples
Just edit the name in first and second page of this project and the project is all yours.
Watch my video for further explaination
https://www.youtube.com/watch?v=1IoOGG_SBzw&lc=z22ju3nxqvrvzrghz04t1aokgmmjnqr0ld5exqhxchswrk0h00410
Coffee : Different Kinds of Coffee & Styles of CoffeeMudit Grover
• Coffee :
Different Kinds of Coffee & Styles of Coffee
• Made By:
• Mudit Grover (18)
• Coffee
• Coffee is a brewed beverage.
• Prepared from the roasted seeds of an evergreen shrub of the genus Coffea.
• Mainly cultivated in India, Latin America & South America.
• Methods of Coffee Preparation
• Brewing
Process of infusing the coffee beans or coffee powder with hot water for a specific period of time.
Brewed coffee, if kept hot, will deteriorate rapidly in flavour.
Reheating such coffee tends to give it a "muddy" flavour.
• Vacuum Pot
Also known as vac pot, siphon or syphon coffee maker.
Excessively complex for everyday use.
• French Press
• Also known as a press pot, coffee press ,coffee plunger.
• The best and convenient method for brewing the coffee.
Percolator Method
• Continually cycling the boiling water for the process of brewing.
• May recirculate already brewed coffee through the beans.
• Types of Coffee
• Caffè Americano(America)
– Prepared by adding hot water to espresso.
– Consists of a single or double-shot of espresso combined with between 30 - 470ml of hot water.
• Café au lait
– Traditionally the French way of preparing 'coffee with milk' both at home and in Cafés in Europe.
• Caffè latte(Italy)
– A portion of espresso and steamed milk.
– With a little foam on top.
• Café mocha
– A variant of a caffè latte.
– Typically one third espresso and two thirds steamed milk.
– A portion of chocolate is added, typically in the form of a chocolate syrup.
• Video
• Cappuccino(Italy)
– Prepared with espresso, hot milk, and steamed milk foam.
– Traditionally served in a porcelain cup.
• Espresso(Italy)
– A concentrated beverage brewed by forcing a small amount of nearly boiling water.
– Acts as the base for other drinks.
– Has more caffeine per unit volume than most beverages.
• Ristretto
– A very "short" shot of espresso coffee.
• Instant coffee
– The coffee is dehydrated into the form of powder or granules.
– Can be rehydrated with hot water to provide a drink similar.
– Brand of instant coffee
• Nescafe
• Moccona
• Folgers
• Major Coffee Producing Countries
• South America:- brazil, Columbia, Venezuela
• Africa:- Kenya, Ethiopia etc
• Central America:- costa rica, Jamaica, mexico etc.
• Asia:- India, Indonesia.
• Learning Outcome
• We learnt about the different methods of preparing coffee.
• Different styles of coffee.
• Coffee producing countries.
• Bibliography
• Video made from Nibs.
• Food & Beverage Service – Bibekananda Kanjilal
• www.google.com
• www.wikipedia.com
• www.britannica.com
Read and share with your tea loving friends and staff to spread the love and knowledge of tea. Learn the basic varieties and glean some advanced details about origins and health benefits.
The Brief Introduction of Chinese Tea Culture
Made by me (Betty Krystal Yang)
And also Making Procedure of Different categories of tea
Credit to Krystal Yang
Mail: bettyyangkris@gmail.com
Chinese tea drinking culture has for long been just a hear say especially regarding its benefits. having experienced it, i present to you the various types of Chinese tea you can enjoy usually available from the near by supermarket.
A presentation carefully introduced Chinese tea & culture, including Chinese tea history,main tea types, major tea producing areas, famous Chinese teas, their taste, origin, features, expounded on Chinese tea art, tea ceremony and Characteristics and spiritual content of Chinese tea culture. It also showed the benefits and taboos of drinking tea, how to store tea and how to recycle tealeaves.
A presentation carefully introduced Chinese tea including main tea types, famous Chinese teas, their taste, origin, features. It also showed the benefits and taboos of drinking tea, how to store tea and how to recycle tealeavs.
Class 12 Chemistry Investigatory Project Work, Practical- Determination of Ca...Kendriya Vidyalaya
Class 12 Chemistry Investigatory Project Work, Practical- Determination of Caffeine in Tea Samples
Just edit the name in first and second page of this project and the project is all yours.
Watch my video for further explaination
https://www.youtube.com/watch?v=1IoOGG_SBzw&lc=z22ju3nxqvrvzrghz04t1aokgmmjnqr0ld5exqhxchswrk0h00410
For 11th and 12th grade students, an investigatory project on the topic "Determination of Caffeine in Tea Samples".
Subject: Chemistry.
That's all folks, see ya :)
SISEL KAFFE is here, it's the world's best tasting and healthiest coffee. Find out how SISEL found the world's best coffee and then added natural ingredients for mental clarity, immunity support, and longevity. SISEL is the new coffee powerhouse in the coffee industry.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
Dear Dr. Kornbluth and Mr. Gorenberg,
The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
• The Committee on Oversight and Accountability is investigating the sources of funding and other support flowing to groups espousing pro-Hamas propaganda and engaged in antisemitic harassment and intimidation of students. The Committee on Oversight and Accountability is the principal oversight committee of the US House of Representatives and has broad authority to investigate “any matter” at “any time” under House Rule X.
• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
Francesca Gottschalk - How can education support child empowerment.pptxEduSkills OECD
Francesca Gottschalk from the OECD’s Centre for Educational Research and Innovation presents at the Ask an Expert Webinar: How can education support child empowerment?
Francesca Gottschalk - How can education support child empowerment.pptx
Caffine -Ruturaj Gohil
1. ALL INDIA SENIOR SECONDARY
CERTIFCATE EXAMS
(2017-2018)
DIVINE CHILD SCHOOL
MEHSANA
PROJECT TITLE :
BIOMOLECULE(CAFFEINE)
NAME:RITHIK GOHIL
CLASS:XII Sci. B
ENROLMENTNO:
3. Acknowledgement
I acknowledge the great timely and
voluntary help and guidance from the
following personalities without whose
help the project could not have been
completed successfully.First off all I wish
to express my hearty thanks to the school
management, Smt. ANANDI MADAM &
principle Mr. K.M. CHERIAN for providing
all sorts of help in order to make this
project possible.I would also like to
acknowledge my biology teacher Mrs.
SUJA PHILIPS who were always with me
during the project and helped me for the
successful transformation of an idea into
a project.
4. RITHIK GOHIL
DECLARATION
I do hereby declare that this project work has
been originally carried out by me under the
guidance and supervision of Mrs. SUJA PHILIPS
of Divine Child School, Mehsana.
RITHIK GOHIL
Date:
6. CERTIFICATE
This is to certify that this project
entitled
“BIOMOLECULE(CAFFEINE)”
Submitted by RITHIK GOHIL to BIOTECH
Department,
DIVINE CHILD SCHOOL (MEHSANA)
And was carried out by him under by
guidance and supervision during the
academic year 2017-2018
BIOLOGY TEACHER:
Mrs. SUJA PHILIPS
PRINCIPLE
7. Mr. K. M. CHERIAN
OVERVIEW OF CAFFIENE
1.Caffeine, nitrogenous or organic caffeine occurs
in coffee, guarana, mate, nuts etc.
2. Pure Caffeine(trimethylhexamine)occurs as a
white powder or as silky needles, which melts
on 511 K,it sublimes at atmospheric pressure .It
is very soluble in water upon cooling ; the
solution deposits crystals of caffeine
monohydrates. Caffeine is generally very less
soluble in organic compound then in hot water .
It is odourless but in taste .
3.Caffeine is present in ground coffee in amount
ranging between 0.75 and 1.5%.Theaverage cup
of coffee thus contains 100mg of caffeine.
4.Caffeine has stimulatingeffect on CNS , heart,
blood vesseland kidney . It acts as a mild
diuretic .
5.Caffeine is common cardiac and respiratory
stimulant. It act as a diuretic also .It is a white
tasteless substances havinga structure closely
related to purine use found in deoxyribonucleic
8. acid (DNA) compound of the alkaloid group,
substances that has marked physiologicaleffect.
WHAT IS CAFFIENE ?
Caffeineis known medically as
trimethylxanthine, and the chemical formula
is𝐶8 𝐻10 𝑁4 𝑂2.Whenisolatedinpure form caffeine
is a crystal powder that tastes bitter. The chief
source of pure caffeine is by the process of
decaffeinating coffee and tea.
Medically, caffeine is useful as cardiac
stimulating and also a mild diuretic (it increases
urine production). Recreationally, it is used to
provide a “boost of energy” or feeling of
heightened alertness. It’s often used to stay
awake longer.
Caffeine is an addictive drug. Among its many
actions it operates using the same mechanism
that amphetamines, cocaine and heroin use to
stimulate the brain . On a spectrum, Caffeine’s
effects are more mild than amphetamines,
cocaine and heroin, but it is manipulating the
same channels and that is one the things that
9. gives caffeine qualities. If you feel like you can’t
function without it and must consume it every
day, then you are addicted tocaffiene
History
Discovery and spread of use
According to Chinese legend, the Chinese
emperorShennong, reputed to have reigned in about
3000 BCE, accidentallydiscovered tea when he noted that
when certain leaves fell into boiling water, a fragrant and
restorative drink resulted. Shennong is also mentioned in
Lu Yu's Cha Jing a famous early work on the subject of
tea.
The earliest credible evidence of either coffee drinking or
knowledge of the coffee tree appears in the middle of the
fifteenth century, in the Sufimonasteries of the Yemenin
southern Arabia. From Mocha, coffee spread to Egyptand
North Africa, and by the 16th century, it had reached the
rest of the Middle East, Persiaand Turkey. From the
Middle East, coffee drinking spread to Italy, then to the
rest of Europe, and coffee plants were transported by the
Dutch to the East Indies and to the Americas.
12. ISOLATIONOF “CAFFIENE”
FROM COFFEE
OBJECTIVE
-to isolate caffiene from
coffee leaves
APPARATUS
-Beakers, funnel, separating
funnel, distillation mask,
condenser, conical flask.
CHEMICALS
-Coffee leaves , chloroform,
10% lead acetate
13. PROCEDURE
1.Take about 20g of coffee leaves in a 500 ml
beaker. Add to it about 200mlof water. Boil the
contents for about 30 minutes filter while hot.
Collect the filtrate in another clean beaker.
2.To the filtrate , add 10% aqueous solution of
lead acetate with constant stirring until no
precipitate is formed.
3.Transfer the filtrate to another clean beaker.
Concentrate it by boiling to a volume of
about 25ml and cool it to a room
temperature.
4.Add 25ml chloroform to the cold filtrate. Stir
the resulting mixture thoroughly with a glass
rod and transfer it into a clean separation
funnel.
5.When the mixture is separated into 2 distinct
layers , run down the lower chloroform layer
into clean distilled flask.
14. 6.To the aqueous layer, add 20 ml more of
chloroform and shake well. Give time to
separated the phases and remove the lower
chloroform into the distilled flask . Extract the
aqueous layer with another lot of 20ml
chloroform. Distill offchloroform from chloroform
extract on a water bath using water condenses.
Scrape the dried residue from the flask with
a spatula and weight it.
7.Purify small amount of crude caffiene by
sublimation or dissolving it in minimum
quantity.
8.Boiling water and then cooling undisturbed.
Filter the needle shaped crystal of caffeine, dry
these between folds of filter paper and dry
these between folds of filter paper and
determined the melting point.
16. CONCLUSION
The sample containing
higher percentage
ofcaffiene gives better
flavor.
BRU has the maximum
percentage of caffiene
(i.e. 15%).
17. Therefore BRU offers
better flavor than the
three.
USAGE
Caffeine is used in:
Bronchopulmonary dysplasiain
premature infants for both
prevention and treatment. It may
improve weight gain during
therapy and reduce the incidence
of cerebral palsy as well as reduce
language and cognitive delay. On
the other hand, subtle long-term
side effects are possible.
18. Apnea of prematurity as a
primary treatment but not
prevention.
Orthostatic hypotension
treatment.
BIBLIOGRAPHY
ENCYCLOPIDEA-GOOGLE
Britannica encyclopedia
Wikipedia.org