What is Ethereum cos
Publish: 2021-05-11 22:03:14
1. Eth is a kind of digital token of Ethereum, which is regarded as "bitcoin version 2.0". It adopts the blockchain technology "Ethereum", which is different from bitcoin. It is an open-source public blockchain platform with intelligent contract results, and a resonance network composed of tens of thousands of computers around the world. Developers need to pay eth to support the application. Like other digital currencies, ether currency can be bought and sold on the trading platform
warm tips: the above explanations are for reference only, without any suggestions. There are risks in entering the market, so investment should be cautious. Before making any investment, you should make sure that you fully understand the nature of the investment and the risks involved in the proct. After a detailed understanding and careful evaluation of the proct, you can judge whether to participate in the transaction
response time: December 2, 2020. Please refer to the official website of Ping An Bank for the latest business changes
[Ping An Bank I know] want to know more? Come and see "Ping An Bank I know" ~
https://b.pingan.com.cn/paim/iknow/index.html
warm tips: the above explanations are for reference only, without any suggestions. There are risks in entering the market, so investment should be cautious. Before making any investment, you should make sure that you fully understand the nature of the investment and the risks involved in the proct. After a detailed understanding and careful evaluation of the proct, you can judge whether to participate in the transaction
response time: December 2, 2020. Please refer to the official website of Ping An Bank for the latest business changes
[Ping An Bank I know] want to know more? Come and see "Ping An Bank I know" ~
https://b.pingan.com.cn/paim/iknow/index.html
2. Cosplay, short for cosplay, is an expression of love in which the third dimension imitates the second dimension through role play
3. One explanation: cos can also be short for cosine< The second explanation: COS is the abbreviation of "cost" in English, its verb is cos, and the person who plays COS is generally called Coser. Generally speaking, the earliest Chinese translation of cosplay is from Taiwan, which means role playing. In today's cosplay, its form and content generally refers to the use of clothing, trinkets, props and make-up to play the role of ACG (anime, comic, game) or some Japanese visual band and some characters in the film. From this, we can see that Cosplay contains quite a wide space in positioning, even as long as there is cosplayer in the place, This field and its characteristics are absolutely the mainstream of today's youth pop culture.
4. 1、
cos means role playing<
II.
cos α， It represents the angle α The cosine of
in a right triangle, cos α = horn α Adjacent / hypotenuse of
cos means role playing<
II.
cos α， It represents the angle α The cosine of
in a right triangle, cos α = horn α Adjacent / hypotenuse of
5. As the name suggests, cos is the abbreviation of "cost" in English, its verb is cos, and the person who plays COS is generally called Coser. Generally speaking, the earliest Chinese translation of cosplay is from Taiwan, which means role playing. But because this translation means role-playing with role play game (RPG), the author prefers another translation -- dress up. In today's cosplay, its form and content generally refers to the use of clothing, trinkets, props and make-up to play the role of ACG (anime, comic, game) or some Japanese visual band and some characters in the film. From this, we can see that Cosplay contains quite a wide space in positioning, even as long as there is cosplayer in the place, This field is absolutely the mainstream of today's youth pop culture<
origin of cosplay
talking about the original origin of cosplay, now we generally agree that the birthplace of cosplay is located in Japan. Of course, if this is based on the contemporary Cosplay concept, it can be said so. But in a broad sense, the real birthplace of animation Cosplay is definitely located in the United States in the Western Hemisphere, and even if we really want to explore the original form of cosplay, I can tell you without hesitation that Cosplay first appeared in the centuries before the first year of A.D! Because whether it's the costume of Greek priests that existed around 1000 BC, or the group of great traveling poets who co wrote two great Greek epics Iliad and Odyssey in the 8th century BC, they are actually playing the role of others. The former became the prophet and foresight of later generations, and the successful Cosplay helped the existence of the apostles of God, while the latter was like the originator of modern stage drama, and the superb Cosplay helped the deeds of those singing and weeping heroes. In fact, COSPLAY should include and dress up meaning not only refers to a kind of external visualization, more important is to Cosplay people's heart. Well, back to business. Next, let's talk about the real birthplace of cosplay - the United States
How can Cosplay be formed in the United States
since the 17th century, Athanasius Kircher, a Jesuit priest, invented & quot; Magic slide & quot; After that, the emergence of animation has become a necessity. In the following century, it became popular in Europe; Magic slide;, Until the end of the 1830s, Walter; After the appearance of Disney's little mouse, the American animation style had a definite definition, and cosplay, the first real animation character in history, was born in this period. Yes, there is no doubt that the cute Mickey Mouse is very popular in America and all over the world. Walter & Chen 8226; Disney decided to create the world's first Disneyland in 1955. At the same time, in order to promote the proct itself and better attract tourists, Walter & Chen 8226; Disney also invited employees to wear Mickey Mouse costumes for tourists to enjoy or take photos. Therefore, it can be said that at the beginning of this group of unknown & quot; Mickey Mouse & quot; The dresser is the real ancestor of cosplayer all over the world. It can also be seen from this that Cosplay was originally formed for a commercial purpose rather than a consumption of popular taste. In fact, there is a very important basis for us to take Disney as the real birthplace of cosplay, that is, the professional proction of cosplay costumes worn by Disney costumers at that time. Although today's Cosplay clothing is concerned, many of them are made by the costumers themselves. But as the origin of cosplay, it is necessary to have a standardized and systematic clothing proction organization
at first, it was Walt & Chen who made Cosplay costumes for the group of Disney characters dressed up as Mickey Mouse, Bruto, guffy, Donald Duck and other Disney characters in Disneyland at that time; Disney's earlier props department. Shortly after the formal establishment of the park, Walter & Chen; Disney expanded the scale of the props department, in addition to making props for film and television works, but also responsible for all the cosplay clothes needed to work in the park. Of course, the early so-called Cosplay clothing is just a fixed shape & quot; Big paper bag;, There is no aesthetic feeling to speak of, and the finished proct is relatively rough. It is easy for the wearer to have poor breathing after wearing this kind of clothing. But anyway, compared with that time, Disney's cosplay costume proction had a certain scale
is Japan the real creator of cosplay
at this moment in Japan, because the Red Book Comic "new treasure island", which was adapted from the original work of Sakai Qima by kazuka kazuka in 1947, has shown its brilliance, and set off an upsurge of new comics in Japan. As a result, the whole ACG (anime, comic, game) market in Japan is greatly prosperous, thus laying a solid foundation for the establishment of ACG's position in Japan. Just at this time, Disney's Cosplay was introced to Japan, and ACG instry started to imitate it. As a result, it became a trend and became the normal activity of ACG instry in Japan. The earliest Cosplay in Japan appeared in the thirtieth year of Showa (1955 AD). At that time, the so-called Cosplay was just a kind of dress up for children's games. In that year, it happened that moonlight mask and young Jeter were popular in Japan, so many children were the protagonists of cosplay at that time. Although Cosplay at this time is purely a children's thing, but in terms of clothing or quite particular, of course, the premise is to have money. At that time, there was no special Cosplay clothing store in Japan. If children want to have the same clothing as the hero in the animation, they must first ask someone to draw the design drawings, and then go to the department store to ask someone to sew them. Today's famous game procer Prince hiroi, when he was a child, COSPLAY's costume design was drawn by geisha on a Geisha street near his home. This relatively crude situation has been maintained for nearly 20 years. Until the 1970s and early 1980s, ACG in Japan experienced a period of exploration and growth, cosplay, as a subsidiary culture of ACG, graally got a real development. It can be said that today's concept of cosplay is completely inherited from Japan at that time
however, in the 1980s, although Cosplay in Japan developed in higher age groups and more groups, it still did not hold a real sense of pure Cosplay activities. At this time, COSPLAY is more attached to another peripheral culture brought by ACG, the community of friends (whose works are called friends)& quot; Tongren & quot; The word originated in Japan, originally refers to & quot; A group of people with the same interest, jointly create their own literary works, known as tongren;. In other words, as long as like-minded friends gather their literary and artistic works into volumes, instead of publishing them by commercial publishing houses, they print them out of their own pocket and circulate them among friends, they can be called & quot; Tongren & quot;. Because of the popularity of Japanese animation and video game culture at that time, many good popular works were very popular in Tonghao; Commercial works will be adapted, and the form of comic book biography will be compiled; It has graally become the mainstream of the community. What is related to this is the rise of a large number of peer associations. In order to recruit members and participate in the peer club, the first peer club started in December 1975. At that time, it was only a small peer club with 32 organizations and more than 600 people, However, in the 1980s, it became a super large-scale one-on-one sales Fair (two to three times a year). Members of various associations dressed up as cartoon or video game characters to attract friends to visit the stalls. This phenomenon is known as & quot; in Japan; Look at the version;. As a result, this trend exploded and quickly caused a trend in cosplay. The number of people who joined Cosplay grew rapidly. Later, their personality was even comparable to that of the same people's will<
after the naivety of the 1960s and 1970s and the start-up of the 1980s, COSPLAY in the 1990s, accompanied by the rapid maturity of the game instry in Japan's ACG instry (the most typical is the next generation competition among Nintendo, SEGA and Sony) and the endless emergence of visual music groups, began to get on the right track, becoming a subsidiary culture of the ACG instry with a very large scale. In the 1990s, the Japanese ACG instry successfully held a large number of animation exhibitions and game exhibitions. In order to promote their own procts, Japanese comic merchants and video game companies at that time found some men and women Cosplay in these game exhibitions and comic festivals to become ACG characters in order to attract the participants. This move can be said to be the same as that of Walter; When Disney opened Disneyland, it was the same. It can be seen that the key to the formation and development of cosplay is to build on the degree of ACG commercialization. It can be said that Cosplay itself can be developed and understood by leaps and bounds only when it is used as a commercial means of promotion
what is COSPLAY in Chinese mainland, Taiwan and Hongkong?
Cosplay was introced into China later. The first recorded Cosplay in Taiwan was on August 27, 1995, located on the first floor of Saga world in Kaohsiung. However, it is said that the scale of cosplay was not large at that time, and the characters were mainly from video games. After that, on October 13, 1996, Taipei baby bear restaurant was opened by & quot; Super orange Group & quot; An autumn party was held. Although it was widely publicized before the meeting and many people knew about it, the scale was still small. This situation continued until the middle of February 1997, when three activities were held in a row, the number of cosplay people began to increase, and from then on formed the characteristics of cosplay in Taiwan. Since then, the number of cosplay events in Taiwan has begun to increase year by year, and the venue has also developed from the north to the South Central. The popularity of cosplay activities in Taiwan can be seen from this
it seems that Cosplay appeared in Hong Kong earlier than Taiwan. It is said that Hong Kong had its own Cosplay as early as 1993. At that time, Hong Kong did not have any clubs for sale. Generally speaking, the clubs held exhibitions and sales through the art festival venues held in Hong Kong every year. It was in that year (that is, 1993) that a club named & quot; Four hundred feet; In this way, they became the original Cosplay of Hong Kong. In the same session the next year, they also played the role of the allies, but this time they also brought another group of fellow members called "uvrz" to play the role. Those & quot; UVRZ" The female members of the group put on Japanese witches' clothes and prayed for the visitors with witches' sticks. In 1995 & quot; Four hundred feet; Played the part of mobile police
origin of cosplay
talking about the original origin of cosplay, now we generally agree that the birthplace of cosplay is located in Japan. Of course, if this is based on the contemporary Cosplay concept, it can be said so. But in a broad sense, the real birthplace of animation Cosplay is definitely located in the United States in the Western Hemisphere, and even if we really want to explore the original form of cosplay, I can tell you without hesitation that Cosplay first appeared in the centuries before the first year of A.D! Because whether it's the costume of Greek priests that existed around 1000 BC, or the group of great traveling poets who co wrote two great Greek epics Iliad and Odyssey in the 8th century BC, they are actually playing the role of others. The former became the prophet and foresight of later generations, and the successful Cosplay helped the existence of the apostles of God, while the latter was like the originator of modern stage drama, and the superb Cosplay helped the deeds of those singing and weeping heroes. In fact, COSPLAY should include and dress up meaning not only refers to a kind of external visualization, more important is to Cosplay people's heart. Well, back to business. Next, let's talk about the real birthplace of cosplay - the United States
How can Cosplay be formed in the United States
since the 17th century, Athanasius Kircher, a Jesuit priest, invented & quot; Magic slide & quot; After that, the emergence of animation has become a necessity. In the following century, it became popular in Europe; Magic slide;, Until the end of the 1830s, Walter; After the appearance of Disney's little mouse, the American animation style had a definite definition, and cosplay, the first real animation character in history, was born in this period. Yes, there is no doubt that the cute Mickey Mouse is very popular in America and all over the world. Walter & Chen 8226; Disney decided to create the world's first Disneyland in 1955. At the same time, in order to promote the proct itself and better attract tourists, Walter & Chen 8226; Disney also invited employees to wear Mickey Mouse costumes for tourists to enjoy or take photos. Therefore, it can be said that at the beginning of this group of unknown & quot; Mickey Mouse & quot; The dresser is the real ancestor of cosplayer all over the world. It can also be seen from this that Cosplay was originally formed for a commercial purpose rather than a consumption of popular taste. In fact, there is a very important basis for us to take Disney as the real birthplace of cosplay, that is, the professional proction of cosplay costumes worn by Disney costumers at that time. Although today's Cosplay clothing is concerned, many of them are made by the costumers themselves. But as the origin of cosplay, it is necessary to have a standardized and systematic clothing proction organization
at first, it was Walt & Chen who made Cosplay costumes for the group of Disney characters dressed up as Mickey Mouse, Bruto, guffy, Donald Duck and other Disney characters in Disneyland at that time; Disney's earlier props department. Shortly after the formal establishment of the park, Walter & Chen; Disney expanded the scale of the props department, in addition to making props for film and television works, but also responsible for all the cosplay clothes needed to work in the park. Of course, the early so-called Cosplay clothing is just a fixed shape & quot; Big paper bag;, There is no aesthetic feeling to speak of, and the finished proct is relatively rough. It is easy for the wearer to have poor breathing after wearing this kind of clothing. But anyway, compared with that time, Disney's cosplay costume proction had a certain scale
is Japan the real creator of cosplay
at this moment in Japan, because the Red Book Comic "new treasure island", which was adapted from the original work of Sakai Qima by kazuka kazuka in 1947, has shown its brilliance, and set off an upsurge of new comics in Japan. As a result, the whole ACG (anime, comic, game) market in Japan is greatly prosperous, thus laying a solid foundation for the establishment of ACG's position in Japan. Just at this time, Disney's Cosplay was introced to Japan, and ACG instry started to imitate it. As a result, it became a trend and became the normal activity of ACG instry in Japan. The earliest Cosplay in Japan appeared in the thirtieth year of Showa (1955 AD). At that time, the so-called Cosplay was just a kind of dress up for children's games. In that year, it happened that moonlight mask and young Jeter were popular in Japan, so many children were the protagonists of cosplay at that time. Although Cosplay at this time is purely a children's thing, but in terms of clothing or quite particular, of course, the premise is to have money. At that time, there was no special Cosplay clothing store in Japan. If children want to have the same clothing as the hero in the animation, they must first ask someone to draw the design drawings, and then go to the department store to ask someone to sew them. Today's famous game procer Prince hiroi, when he was a child, COSPLAY's costume design was drawn by geisha on a Geisha street near his home. This relatively crude situation has been maintained for nearly 20 years. Until the 1970s and early 1980s, ACG in Japan experienced a period of exploration and growth, cosplay, as a subsidiary culture of ACG, graally got a real development. It can be said that today's concept of cosplay is completely inherited from Japan at that time
however, in the 1980s, although Cosplay in Japan developed in higher age groups and more groups, it still did not hold a real sense of pure Cosplay activities. At this time, COSPLAY is more attached to another peripheral culture brought by ACG, the community of friends (whose works are called friends)& quot; Tongren & quot; The word originated in Japan, originally refers to & quot; A group of people with the same interest, jointly create their own literary works, known as tongren;. In other words, as long as like-minded friends gather their literary and artistic works into volumes, instead of publishing them by commercial publishing houses, they print them out of their own pocket and circulate them among friends, they can be called & quot; Tongren & quot;. Because of the popularity of Japanese animation and video game culture at that time, many good popular works were very popular in Tonghao; Commercial works will be adapted, and the form of comic book biography will be compiled; It has graally become the mainstream of the community. What is related to this is the rise of a large number of peer associations. In order to recruit members and participate in the peer club, the first peer club started in December 1975. At that time, it was only a small peer club with 32 organizations and more than 600 people, However, in the 1980s, it became a super large-scale one-on-one sales Fair (two to three times a year). Members of various associations dressed up as cartoon or video game characters to attract friends to visit the stalls. This phenomenon is known as & quot; in Japan; Look at the version;. As a result, this trend exploded and quickly caused a trend in cosplay. The number of people who joined Cosplay grew rapidly. Later, their personality was even comparable to that of the same people's will<
after the naivety of the 1960s and 1970s and the start-up of the 1980s, COSPLAY in the 1990s, accompanied by the rapid maturity of the game instry in Japan's ACG instry (the most typical is the next generation competition among Nintendo, SEGA and Sony) and the endless emergence of visual music groups, began to get on the right track, becoming a subsidiary culture of the ACG instry with a very large scale. In the 1990s, the Japanese ACG instry successfully held a large number of animation exhibitions and game exhibitions. In order to promote their own procts, Japanese comic merchants and video game companies at that time found some men and women Cosplay in these game exhibitions and comic festivals to become ACG characters in order to attract the participants. This move can be said to be the same as that of Walter; When Disney opened Disneyland, it was the same. It can be seen that the key to the formation and development of cosplay is to build on the degree of ACG commercialization. It can be said that Cosplay itself can be developed and understood by leaps and bounds only when it is used as a commercial means of promotion
what is COSPLAY in Chinese mainland, Taiwan and Hongkong?
Cosplay was introced into China later. The first recorded Cosplay in Taiwan was on August 27, 1995, located on the first floor of Saga world in Kaohsiung. However, it is said that the scale of cosplay was not large at that time, and the characters were mainly from video games. After that, on October 13, 1996, Taipei baby bear restaurant was opened by & quot; Super orange Group & quot; An autumn party was held. Although it was widely publicized before the meeting and many people knew about it, the scale was still small. This situation continued until the middle of February 1997, when three activities were held in a row, the number of cosplay people began to increase, and from then on formed the characteristics of cosplay in Taiwan. Since then, the number of cosplay events in Taiwan has begun to increase year by year, and the venue has also developed from the north to the South Central. The popularity of cosplay activities in Taiwan can be seen from this
it seems that Cosplay appeared in Hong Kong earlier than Taiwan. It is said that Hong Kong had its own Cosplay as early as 1993. At that time, Hong Kong did not have any clubs for sale. Generally speaking, the clubs held exhibitions and sales through the art festival venues held in Hong Kong every year. It was in that year (that is, 1993) that a club named & quot; Four hundred feet; In this way, they became the original Cosplay of Hong Kong. In the same session the next year, they also played the role of the allies, but this time they also brought another group of fellow members called "uvrz" to play the role. Those & quot; UVRZ" The female members of the group put on Japanese witches' clothes and prayed for the visitors with witches' sticks. In 1995 & quot; Four hundred feet; Played the part of mobile police
6. First of all, there is no COS in the lower right corner of this picture. Second, cos may be the abbreviation of cosplay, which means role play
7. Unknown_Error
8. COS is the role playing of anime fans
many anime fans are not satisfied with watching, writing and drawing anime, but simply devote themselves to the career of playing anime characters, which is cos
at present, there are many cos societies in China, and they have held competitions. I remember last year or the first half of recent years, Hunan TV's "who is the hero" invited a cos competition winning group to perform.
many anime fans are not satisfied with watching, writing and drawing anime, but simply devote themselves to the career of playing anime characters, which is cos
at present, there are many cos societies in China, and they have held competitions. I remember last year or the first half of recent years, Hunan TV's "who is the hero" invited a cos competition winning group to perform.
9. COS is a kind of carbonyl sulfur, which is used for the synthesis of carbon oxides, thioacids, thiocarbonates and thiazoles, storage of grain and wood, sterilization and fumigation
2. Physicochemical properties
melting point: - 138.20 ℃ (100KPA)
boiling point: - 50.20 ℃ (101.325kpa)
liquid density: (- 5.2 ℃, 101.325kpa) 1178kg / m3
gas density: (101.325kpa, 20 ℃,) 2.527kg/m3
relative density: (101.325kpa, 20 ℃, air = 1) 2.10
specific volume: (101.325kpa, 21.1 ℃,) 0.402 m3 / kg
gas liquid volume ratio: (15 ℃, 100KPA) 464l / L
critical temperature: 102 ℃
critical pressure: 5877 kPa
critical density: 429kg / m3
melting heat: 78.660kj/kg
gasification heat: △ HV (- 50.2 ℃) = 380.07 kJ / kg
specific heat capacity (gas, 101.325 kPa, 25 ℃): CP = 711.7 J / (kg · K)
CV = 573.2 J / (kg · K)
specific heat ratio (gas, 101.325kpa, 25 ℃): CP / CV = 1.241
vapor pressure: - 81 ℃, 18.572 kPa; 0℃,618.08kpa; 40℃,1824kpa
viscosity (gas, 101.325kpa, 0 ℃): 0.01166mpa · s
surface tension (- 69.5 ℃): 0.02406n/m
thermal conctivity (gas, 101.325kpa, 25 ℃): 0.01088w / (m · K)
combustion limit in air (20 ℃, 100KPA): 12% ~ 29%
solubility in water (101.325kpa, 0 ℃): 1.333cm3/1cm3h2o
flammability level: 3
toxicity level: 3
reaction activity level: 2
it is a colorless flammable toxic gas with unpleasant odor similar to rotten eggs under normal temperature and pressure. It can be transported as liquefied gas, S.P. is 1204.5kpa at 21.1 ℃,
when mixed with oxygen, it can form explosive gas, and oxidize with bromine water or potassium permanganate to form CO2 and sulfuric acid. It is reced by hydrogen to release CO and H2S, and reacts slowly with water to release CO2 and H2S. When heated, it decomposes in the following two forms:
cos → CO + s< Toxicity
2cos → CO2 + CS2
3
1200ppm, exposed for 35 minutes, died
2900ppm, exposed for 1.5min, died
8900ppm, death occurred in 3 / 4 minutes
the toxic effect of carbonyl sulfur is mainly caused by hydrogen sulfide formed by the interaction between carbonyl sulfur and water after being inhaled by human body. It has a slight irritating effect on the lungs. It mainly damages the central nervous system, causing respiratory paralysis and death
symptoms include headache, dizziness, coma, etc
in case of eye contact, rinse thoroughly with water immediately, and then drop in a drop of olive oil. When the pain is severe, 4-5 drops of adrenaline sulfate can relieve the pain
4. Safety protection
the workplace should be ventilated to keep the ambient air fresh and dry. The gas storage cylinder shall be far away from heat source and fire, and shall be isolated from oxygen, other highly oxidizing substances and flammable substances. Check valve and buffer tank shall be set between liquid container and cylinder to prevent liquid from flowing into cylinder
dry and anhydrous COS is non corrosive and can be used as common metal materials
when there is moisture, it is corrosive, so aluminum and stainless steel should be used. Polytetrafluoroethylene and polytetrafluoroethylene can be used as polymers. The cos device should be baked at 120 ℃ for at least 30 minutes before use, and vacuumized to P ＜ 10-2mmhg at the same time
when the cylinder leaks and cannot be blocked, wear a gas mask and stand in a well ventilated place. Treat it with potassium hydroxide containing alcohol or basic hypobromic acid as absorbent, or lead it into the burner for combustion treatment
it is explosive when mixed with air up to 11.9% ~ 26.5% (volume). It decomposes into CO and s at 300 ℃. Combustion in air proces CO2 and SO2. It can be stored in a dry state, but it will hydrolyze when there is water and steam, and react with water slowly to proce CO2 and H2S. It can be absorbed by KOH and decomposed rapidly. 54 ml (20 ℃) in 1 g water, 8 ml (22 ℃) in 1 ml ethanol and 15 ml (22 ℃) in 1 ml toluene. It is more soluble in CS2. Specific gravity 1.24 (liquid, - 87 ℃). Gas 1 liter weighs 1.073 g (0 ℃).
2. Physicochemical properties
melting point: - 138.20 ℃ (100KPA)
boiling point: - 50.20 ℃ (101.325kpa)
liquid density: (- 5.2 ℃, 101.325kpa) 1178kg / m3
gas density: (101.325kpa, 20 ℃,) 2.527kg/m3
relative density: (101.325kpa, 20 ℃, air = 1) 2.10
specific volume: (101.325kpa, 21.1 ℃,) 0.402 m3 / kg
gas liquid volume ratio: (15 ℃, 100KPA) 464l / L
critical temperature: 102 ℃
critical pressure: 5877 kPa
critical density: 429kg / m3
melting heat: 78.660kj/kg
gasification heat: △ HV (- 50.2 ℃) = 380.07 kJ / kg
specific heat capacity (gas, 101.325 kPa, 25 ℃): CP = 711.7 J / (kg · K)
CV = 573.2 J / (kg · K)
specific heat ratio (gas, 101.325kpa, 25 ℃): CP / CV = 1.241
vapor pressure: - 81 ℃, 18.572 kPa; 0℃,618.08kpa; 40℃,1824kpa
viscosity (gas, 101.325kpa, 0 ℃): 0.01166mpa · s
surface tension (- 69.5 ℃): 0.02406n/m
thermal conctivity (gas, 101.325kpa, 25 ℃): 0.01088w / (m · K)
combustion limit in air (20 ℃, 100KPA): 12% ~ 29%
solubility in water (101.325kpa, 0 ℃): 1.333cm3/1cm3h2o
flammability level: 3
toxicity level: 3
reaction activity level: 2
it is a colorless flammable toxic gas with unpleasant odor similar to rotten eggs under normal temperature and pressure. It can be transported as liquefied gas, S.P. is 1204.5kpa at 21.1 ℃,
when mixed with oxygen, it can form explosive gas, and oxidize with bromine water or potassium permanganate to form CO2 and sulfuric acid. It is reced by hydrogen to release CO and H2S, and reacts slowly with water to release CO2 and H2S. When heated, it decomposes in the following two forms:
cos → CO + s< Toxicity
2cos → CO2 + CS2
3
1200ppm, exposed for 35 minutes, died
2900ppm, exposed for 1.5min, died
8900ppm, death occurred in 3 / 4 minutes
the toxic effect of carbonyl sulfur is mainly caused by hydrogen sulfide formed by the interaction between carbonyl sulfur and water after being inhaled by human body. It has a slight irritating effect on the lungs. It mainly damages the central nervous system, causing respiratory paralysis and death
symptoms include headache, dizziness, coma, etc
in case of eye contact, rinse thoroughly with water immediately, and then drop in a drop of olive oil. When the pain is severe, 4-5 drops of adrenaline sulfate can relieve the pain
4. Safety protection
the workplace should be ventilated to keep the ambient air fresh and dry. The gas storage cylinder shall be far away from heat source and fire, and shall be isolated from oxygen, other highly oxidizing substances and flammable substances. Check valve and buffer tank shall be set between liquid container and cylinder to prevent liquid from flowing into cylinder
dry and anhydrous COS is non corrosive and can be used as common metal materials
when there is moisture, it is corrosive, so aluminum and stainless steel should be used. Polytetrafluoroethylene and polytetrafluoroethylene can be used as polymers. The cos device should be baked at 120 ℃ for at least 30 minutes before use, and vacuumized to P ＜ 10-2mmhg at the same time
when the cylinder leaks and cannot be blocked, wear a gas mask and stand in a well ventilated place. Treat it with potassium hydroxide containing alcohol or basic hypobromic acid as absorbent, or lead it into the burner for combustion treatment
it is explosive when mixed with air up to 11.9% ~ 26.5% (volume). It decomposes into CO and s at 300 ℃. Combustion in air proces CO2 and SO2. It can be stored in a dry state, but it will hydrolyze when there is water and steam, and react with water slowly to proce CO2 and H2S. It can be absorbed by KOH and decomposed rapidly. 54 ml (20 ℃) in 1 g water, 8 ml (22 ℃) in 1 ml ethanol and 15 ml (22 ℃) in 1 ml toluene. It is more soluble in CS2. Specific gravity 1.24 (liquid, - 87 ℃). Gas 1 liter weighs 1.073 g (0 ℃).
10. COS is the abbreviation of "cost" in English, its verb is cos, and the person who plays COS is generally called Coser. Generally speaking, the earliest Chinese translation of cosplay is from Taiwan, which means role playing. But because this translation means role-playing with role play game (RPG), the author prefers another translation -- dress up. In today's cosplay, its form and content generally refers to the use of clothing, trinkets, props and make-up to play the role of ACG (anime, comic, game) or some Japanese visual band and some characters in the film. From this, we can see that Cosplay contains quite a wide space in positioning, even as long as there is cosplayer in the place, This field is absolutely the mainstream of today's youth pop culture
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