8. The Processing of Coffee Cherry

     Do you wander how coffee cherry, red, like cherry, a ripe fruit of coffee tree, become coffee beans?

Inside the coffee cherry, there are two stones, called green coffee beans. After peeling off the coffee cherry, we can get the seed of it. However, it's hard to peel using machine because of the thick layer containing pectin,果膠. After putting coffee cherry into water to distinguish bad coffee cherry, floating one,we usually adopt three ways to get rid of it, wet process, dry process and honey process.  

In wet process, bacillus,乳酸菌, and yeast,酵母菌, and some enzyme, 酵素, in the coffee beans decompose the pectin, pectin deriving lactic acid乳酸, alcohol, ketone 酮類, further deriving to acetic acid醋酸, which gives bad smell.  So the time is important in each process of coffee lol. After fermenting, the coffee beans is washed, dried. 

In dry process, the coffee cherry is put in the sunshine two weeks, pectin decomposing, most important, different to the wet process, glutamic acid decomposing into Aminobutyric acid 氨基丁酸, not apple acid.  Unlike apple acid, aminobutyric acid isn't that sour. The research pointed out there are more glucose and fructose果糖 in dry process.  

In honey process, the coffee cherry is peeled, placed in the sunshine two weeks.  Though I cannot tell why it differs from dry process, coffee have honey and fruity aroma without strong, bad smell.  My experience of honey processed coffee is wonderful!!!!!  #edited at 6:34 am ( I couldn't resist to type after having a cup of honey processed coffee.) 

reference: 咖啡精品學 author:韓懷宗

7. How to Make Coffee (iii) & Coffee Cupping

     Sorry, I use this title third times because to make coffee is difficult.  Forgive me. >"<

This piece is <Vocalise> by Rachmaninov, beautiful and  peaceful, performed by Parelman.

      When you brew the coffee, the coffee smells differently as the time goes.  In the first stage, the floral or cut meadow smell goes out, then the fruit smell , then the caramel smell, in the end, the coal smell and every bad smell XDDD
      Some love more floral smell, while some love more sweetness, the caramel smell. So you need concentrate on the smell of coffee while brewing, brewing the coffee to a certain degree you love the smell the most, turning off the fire.  
     In the whole process, be careful not to burn the coffee beans because of too strong fire. If you feel coffee is too acid and bitter, you may burn the coffee beans

       The second part is coffee cupping.  You may ask why the price of coffee beans differs, how retailers determine the price. The answer is the professional coffee tasting-- the coffee cupping. In the coffee cupping, all the circumstances are rigorously demanded by SCAA, specialty coffee association of america, like at which temperature of water or extracting time. After cupping, the coffee will be given a score.  Generally speaking, the score over 80 is a good coffee without major defects.  

      p.s. After tomorrow Chemistry test, I can treat one person a cup of coffee in my dorm. I will choose the first one unless you don't want  :P  

   ref: http://www.scaa.org/?page=resources&d=cupping-standards

6. Aroma and taste of coffee

   This week I want to introduce the aroma of coffee.  Read and find out how many kinds of scent you can find in coffee.
    
   -- Caramelly  
         due to the roasting of coffee beans, almost every coffee bears this flavor

   -- Acidity 
         Not bothersome, the acidity of coffee can be very attractive. Citrus(orange)and  berry are  common flavor you may find especially in Africa coffee. A great acidity isn't harsh and acrid but smooth and mild. 

  -- Fruity&floral
        Many coffee have at least one scent of a fruit or flower though I think this is a little bit hard to distinguish them. Just imagine the flavor of fruits when you drink coffee, finding the flavor in common.

     The taste of coffee is the thing we concern.  Depends on each person, the balance of bitterness and acidity  varies. Some people love light body, and some doesn't. A good cup of coffee waits you to find it out (*´艸｀*)

p.s. this week I went to a fantastic pancake restaurant called " ozna omom " https://www.facebook.com/uznaomom.pancake 　

reference :http://www.zecuppa.com/coffeeterms-cupping-tasting.htm#acidity

  

5.how to brew coffee (ii)

　Hello, this week I continue to introduce how to brew coffee. The left parts are brewing and ending, respectively. 

      Today's music is enlighten and exhilarating. I hope you can thus get rid of bad mood of midterm.٩(｡・ω・｡)و

　To begin with, you need to turn on the heater to make water go to the upper vessel. As the water going to a certain level, about half of the water, you can pour the ground coffee beans into the upper vessel rapidly, using wooden stir to level the beans, waiting until the water fully goes up. In this step, we want to heat up the beans and cook them thoroughly, and thus you shouldn't stir the beans for about 30s~1min. 
　
   Next, poking just through the layer of coffee beans with care every 10~15s for 3~4 times, ensuring not to make the temperature to high, making coffee bitter and even ashy( however some people love ashy coffee, calling it 炭焙珈琲）.
     
      Here we move on to the final step, ending step. Be careful, any movement without elegance can make the coffee into a catastrophe. (￫ܫ￩) Pushing the water forward and backward slowly to disperse the coffee beans "without forming any spiral", turning off the fire, enjoying your own-made coffee.　ก็ʕ•͡ᴥ•ʔ ก้