Culinary: Sushi

hi this time i want to post a blog about my favorite food, i have so many favorite foods but i choose Sushi this time. It seems like every time I have good sushi, I just want it more and more. My curiosity about these delectable little morsels of raw seafood got the best of me this past weekend, 


Sushi is a Japanese food consisting of cooked vinegared rice combined with other ingredients , seafood, vegetables and sometimes tropical fruits. Ingredients and forms of sushi presentation vary widely, but the ingredient which all sushi have in common is rice (also referred to as shari ) or sumeshi ).

Sushi can be prepared with either brown or white rice. Sushi is often prepared with raw seafood, but some common varieties of sushi use cooked ingredients or are vegetarian. Raw fish (or occasionally other meat) sliced and served without rice is called "sashimi".

Sushi is often served with gari (ginger), wasabi, and soy sauce. Popular garnishes are often made using daikon.

•  Nigiri Sushi: Nigiri sushi is a type of Japanese dish made with sushi rice and fresh fish. The sushi rice is hand formed into a small clump, and the fish is sliced and pressed on top of it. In some cases, nigiri sushi uses a small strip of toasted seaweed called nori to bind the whole mixture together, although this is not obligatory. Nigiri sushi is commonly found in sushi restaurants which have a reliable supply of high quality raw fish and well trained cooks. 
• Maguro Nigiri  A lean cut of tuna. This is the inexpensive variety of tuna. When it comes to tuna, fatty cuts are more expensive. 
  
•  California Roll: One of the rare types of Western sushi that's popular in Japan. A roll made of cucumber, imitation crab, and avocado.
  

• HOW TO MAKE NIGIRI SUSHI
  

  ."Shape the rice"

  With your hand wet, grab about 20 grams of shari rice, and shape it to a long, oval from. The rice is going to be the base for the fish to lay on, so the bottom should be flat, and the top could be more rounded. The sides should definitely be a bit rounded.
  
  
  

  "Cut a Slice"

  As already mentioned, nigiri sushi topping can vary, but the basic form is "plain" salmon nigiri. So if it is salmon or tuna fish nigiri sushi you are making, the following measurements should be just fine.
  Take a slice of fish, about 1 cm thick, 5 cm long and 3 cm wide. If the piece of fish you are cutting from is smaller, and does not allow you to cut such a slice, try slicing it at 45 degrees, it will allow you maximum "fish surface".
  Take a pea-sized portion of wasabi, and smear it along the middle of the fish slice. The wasabi will help the slice glue to the piece of rice, to form a steady nigiri sushi.
  
  
  

  . "Sushitrons - form a nigiri sushi!"

  Now it's time to place the slice of fish, with the wasabi side facing down, on the rice. Lay it gently on the rice, and then press it firmly to stick with the rice. You might want to use the other hand to hold the nigiri sushi from the sides while pressing it from above, to avoid "rice loss".
  
  
  
  

Natural Phenomena: Aurora

Aurora (Latin word aurora, "sunrise" or the Roman goddess of dawn), is a natural light display in the sky. predominantly seen in the high latitude (Arctic and Antarctic) regions. Auroras are caused by charged particles, mainly electrons and protons, entering the atmosphere from above causing ionisation and excitation of atmospheric constituents, and consequent optical emissions. Incident protons can also produce emissions as hydrogen atoms after gaining an electron from the atmosphere.

The dancing lights of the aurora provide spectacular views on the ground, but also capture the imagination of scientists who study incoming energy and particles from the sun. Aurora are one effect of such energetic particles, which can speed out from the sun both in a steady stream called the solar wind and due to giant eruptions known as coronal mass ejections or CMEs. After a trip toward Earth that can last two to three days, the solar particles and magnetic fields cause the release of particles already trapped near Earth, which in turn trigger reactions in the upper atmosphere in which oxygen and nitrogen molecules release photons of light. The result: the Northern and Southern lights.
NASA's suite of heliophysics spacecraft track how events on the sun affect near-Earth space, including several missions dedicated to aurora studies. Auroras are but one symptom of a larger space weather system in which solar material and radiation can affect Earth's own magnetic environment and block radio communications, disturb onboard satellite computers, or -- at their worst -- cause electrical surges in power grids.

• Red: At the highest altitudes, excited atomic oxygen emits at 630.0 nm (red); low concentration of atoms and lower sensitivity of eyes at this wavelength make this colour visible only under more intense solar activity. The low amount of oxygen atoms and their gradually diminishing concentration is responsible for the faint appearance of the top parts of the "curtains".
• Green: At lower altitudes the more frequent collisions suppress this mode and the 557.7 nm emission (green) dominates; fairly high concentration of atomic oxygen and higher eye sensitivity in green make green auroras the most common. The excited molecular nitrogen (atomic nitrogen being rare due to high stability of the N₂ molecule) plays its role here as well, as it can transfer energy by collision to an oxygen atom, which then radiates it away at the green wavelength. (Red and green can also mix together to produce pink or yellow hues.) The rapid decrease of concentration of atomic oxygen below about 100 km is responsible for the abrupt-looking end of the lower edges of the curtains. 
• Yellow and pink are a mix of red and green or blue.
• Blue: At yet lower altitudes atomic oxygen is, uncommon, and ionized molecular nitrogen takes over in producing visible light emission; it radiates at a large number of wavelengths in both red and blue parts of the spectrum, with 428 nm (blue) being dominant. Blue and purple emissions, typically at the lower edges of the "curtains", show up at the highest levels of solar activity.
  
  
  
  
  
  
  
  
  
  lower edges of the "curtains", show up at the highest levels of solar activity.