The intensity of the fluorescent reaction of the liquid can be measured by direct or indirect methods. ** 1. Direct measurement method ** 1. ** Direct comparison method ** - First, prepare a standard solution and measure its fluorescence intensity as F_x. The concentration of the standard solution is known as C_s. If the fluorescence intensity of the blank solution can be adjusted to zero, the content of the fluorescent substance to be tested in the sample can be calculated according to the comparison of the fluorescence intensity of the standard solution and the sample solution. If the fluorescence intensity of the blank solution cannot be adjusted to zero, the fluorescence intensity of the blank solution must be deducted from the fluorescence intensity of the sample solution and the standard solution. 2. ** Standard curve method ** - After the standard substance with known content was treated in the same way as the sample, a series of standard solutions were prepared and their fluorescence intensity was determined. A standard curve was drawn with the fluorescent intensity versus the fluorescent substance content. Then, the fluorescence intensity of the sample solution was measured, and the content of the fluorescent substance to be measured in the sample was calculated from the standard curve. In order to ensure that the standard curves drawn each time were consistent, the instrument should be corrected with the same standard solution each time. If the solution was unstable under the illumination of the ultra-violet light, another stable standard solution with similar fluorescence peaks should be used for correction. For example, when determining the standard curve of B1, the solution of Quinine Sulphate could be used as the standard correction instrument. ** II. indirect measurement ** 1. ** chemical conversion method ** - For substances that cannot emit fluorescence or have a low fluorescence quantum yield, and the fluorescence is weak and cannot be directly measured, it can be changed into fluorescent substances suitable for measurement through chemical reactions. For example, the reaction of metals and chelators produces fluorescent chelates, and organic compounds can be converted into fluorescent substances through reactions such as biochemical reactions, oxido-reduction, couples, and condensations. 2. ** fluorescence quenching method **(The document does not describe the specific operation of this method in liquid measurement in detail. It only mentions this method). Read more exciting novels for free
I recommend " From the Bad People to the Heavens ", a novel written by Chestnut Ah-Tang. The protagonist Shen Yu could travel through the world and had a random cheat every time. For example, the world of the bad guys had a god-level selection system, and the human life simulator was broken. The protagonist was not a good person and had a flexible moral bottom line. There was also " The Idiot Players in the Ghost Valley ", a Xianxia novel written by the Great Demon King. Zhang San started the game in the Ghost Valley Eight Desolates Hell Level Sect Ruins and summoned the Blue Star players. These players were all idiotic and funny. " The Eastern Sequence, Starting from Coroner " was also not bad. It was a fantasy novel written by Tantai Zongqi. The forensic doctor Zhao Yao woke up in an antique place and was faced with a pile of corpses. Then, he was involved in the world of warlocks. In " I'm Building an Industry in Ancient Times ", the engineering doctor went back to ancient times to build an industrial system. < Universe's Strongest Chamber of Commerce > tells the story of Zhang Yang's rebirth and the establishment of the Universe's Strongest Chamber of Commerce. The novel " Hundred Years of Spaceship " is equally exciting. Everyone is welcome to click and read it!
Currently, the known Island of Life games were Island of Life 1, Island of Life 3, and the island of life in the Growthball series. These games were all puzzle games with a game size of 1046K. In the island of life game, players had to develop deserted islands, build houses, and so on. The game results would be different depending on the growth order. " The Island of Life " is also a wonderful novel. Everyone is welcome to read it!
I recommend the historical novel " The Duke of Daming State who Traversed 1618 ", written by the toad Tundi. The male protagonist, Liu Weimin, had many identities, from the knight in front of the palace to the Duke of the State. He was a boxer who had transmigrated to the Ming Dynasty. He had a strong survival ability, a strong personality, and liked children. There was also Emperor Wanli and a bunch of other supporting characters, each with their own characteristics. The overall evaluation was not bad. The story of transmigrating to become the emperor's son-in-law at the end of Ming Dynasty was not brainless. Go to School, Then Pretend to Be a Magical Girl, a light novel written by the landing capsule. The setting of the story was interesting. All kinds of strange " magical girls " appeared during the end of the world. The male protagonist, Xu Yang, and the female protagonist, Li Ya, had distinct characters with different abilities and backgrounds. The overall evaluation was that the transmigrator had contributed to the variety of magical girls. " Japanese Entertainment Fake Idol " was an urban novel written by Okuda Asuka. The main character, He Yue, transmigrated from a man to a woman and developed in the Japanese entertainment industry. The story was very strange. The female lead, Asuka Saitou and Caixi Murayama, had interesting personalities. Although there was room for improvement in his writing style, the setting was novel. He liked to watch the transformation style and Japanese entertainment. " Because I'm Too Ugly, I Have All the Charm " was Hu Ayou's fantasy novel. After the male protagonist, Su Chen, was injured, he brought the system to travel through another world and increased his charm value. The supporting actresses had their own characteristics. The overall evaluation was that he had changed from a bootlicker to a bootlicker. Despicable Outlander, a fantasy novel written by Mad Hunter. The male protagonist, Ivan, was playing tricks in the Otherworld with a magic book. The male and female supporting roles were also very interesting. The story had Cthulhu's style, and the more he read, the more interesting it became. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The following are the five stories and their main characters in Dream of the Red Chamber: - [Daiyu Burial of Flowers: The main character is Lin Daiyu.] Daiyu took pity on the fallen flowers and buried them in the soil, reflecting her noble and sentimental nature. - The main characters were Jia Baoyu, Lin Daiyu, Xue Baochai, etc. Everyone enjoyed the snow in Lu Xue 'an and carried out a couplet activity to show their talents and different personalities. - [Qingwen mending fur coat: Qingwen is the main character.] She mended Baoyu's golden coat when he was sick, reflecting Qingwen's ingenuity and her love for Baoyu. - The main characters included Jia Baoyu and the maids in his room, such as Xiren and Qingwen. At the banquet, everyone took up the names of the characters, which reflected the relationship between the characters in Happy Red Courtyard and the fate of different characters. - ** Daiyu Burning Manuscript **: The main character is Lin Daiyu. After Daiyu learned that Baoyu was about to get married, she was disheartened and burned her poems related to Baoyu to show her despair and sorrow. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
In 2015, Wild Child held his 20th anniversary concert in Beijing. This concert was rated by professional music fan Guo Xiaohan as the best performance of contemporary China folk songs. The Republic had given some tickets to readers, including foreign readers who came to watch. This concert left an unforgettable memory for many people. Watching " Wild Child " wasn't enough. Everyone, please click to read the novel!
Yu Shuxin had acted in ten popular TV series, including Eternal Night Galaxy, Canglan Secret, Praying for the Present, Cloud Feather, Young Master Wait, My Wonderful Boyfriend 2: Unforgettable Love, A Little Forest for Two, Next Stop is Happiness, Moonlight Modifications, and Dearest You. While waiting for the TV series, he could also read the exciting content related to this site!
The "Ode to White Begonia" in "Dream of the Red Chamber" had six poems by five people, namely, Tanchun, Baochai, Baoyu, Daiyu and Xiangyun. The details were as follows: ** Jia Tanchun (Banana Guest)** The setting sun is cold and the grass is covered with double doors, and the moss is full after the rain basin. Jade is difficult to compare with the spirit of clean, snow is easy to ecstasy muscle bone. Her heart was weak and delicate, and her beautiful figure was marked by the moon in the third watch. Don't say that the white fairy can ascend to heaven, affectionate accompany me to sing dusk. ** Xue Baochai (Lady Turnip)** Cherish her beauty, close the door during the day, hand in hand to fill the moss basin. Rouge wash out the shadow of autumn steps, ice and snow attract dew to build soul. Only when the light reaches the extreme can I know that the flowers are more beautiful. How can I get the jade without a trace? Want to repay the emperor should be clean, but not Tingting day and dusk. ** Jia Baoyu (Yihong gongzi)** Autumn looks light reflection heavy door, seven sections gathered into a basin full of snow. After bathing, Taizhen ice as a shadow, holding the heart of Xizi jade as a soul. The morning breeze does not disperse a thousand points of sorrow, and the night rain also adds a trace of tears. Alone leaning on the painting column, as if deliberately, clear anvil resentment flute sent dusk. ** Lin Daiyu (Concubine Xiaoxiang)** Half of the curtain was rolled up and half of the door was closed. The ice was ground into a basin made of earth and jade. Steal pear pistil three white, borrow plum blossom a wisp of soul. The immortals in the moon cave sew the white sleeves, and the women in the autumn boudoir wipe away the traces of crying. Shy and silent with whom to complain, tired of leaning on the west wind at night has been dark. ** Shi Xiangyun (An old friend of Zhenxia)** first The immortal came to the capital yesterday and planted a pot of Lantian jade. From then on, frost E love cold, not related to Qian daughter also left the soul. Where is the snow in the autumn shade? Rain stains add to the traces of the night. But I like the poet to sing tirelessly, how can I spend the evening alone? second The steps of Heng Zhi lead to the door of Luo Xue, which is also suitable for the corner of the wall and suitable for the basin. Flowers are difficult to find because they like to be clean, and people are sad for autumn, which is easy to break their souls. The jade candle drips dry the tears in the wind, and the crystal curtain breaks the moon's mark. I want to tell Chang'e my feelings, but the night is dark in the empty corridor. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
" Imperfect Relationship " had relevant emojis. For example, there were cute emojis made by Teng Ruiyu and Qian Cuo's cosplayer. There were also various emoji avatars of CEO Yu in " Imperfect Relationship " that could be used as emojis.
He recommended Little Uncle-Master Addicted to the Internet, a fantasy romance novel written by Zen Listening to the Sword. The male lead's Youngest Uncle, Xuan Mo, was a second-generation otaku who had a high seniority and good aptitude and was raised by the star brain. At the age of 5, he had contact with the outside world after receiving the star brain, and his merit points kept rising. Without a female lead, he was addicted to gaming novels. There was a similar instance dungeon in the book. Although it was a little boring, the story writing was good. " Guide to Cultivating Master and Disciple " was not bad either. It was a novel written by a lazy little beast. The female protagonist had traveled through the Xianxia world and wanted to live a peaceful life, but she had become a master because of a barbecue. This was a light-hearted and humorous story. The master and disciple nurtured each other. The master was narcissistic and gluttonous, while the disciple was good at cooking and was silly and cute. The characters 'personalities were clearly layered, and the plot was well arranged. " Uncle-Master Invincible ", a Xianxia novel written by Black String. The protagonist, Chang Sheng, traveled through the cultivation world to impersonate someone. The genius who fell from Qi deviation was possessed by him. He brought his own pharmacy and little loli disciple. " The Sorcerer: I can extract all things ", a fantasy novel by Lich King No. 13. Heath traveled through the Awakening System and could extract all things to increase his strength. It was a fast-paced novel, and the main character was decisive in killing. 'Difficult to Deal with the Younger Martial Brother of the Immortal Cultivator', a novel by the East Wind Outside the Door. The male and female protagonists were reborn. In the previous life, the female protagonist was harmed by a fake white lotus. After rebirth, she slapped the white lotus in the face. Her junior brother's loyal dog became sick and pestered the female protagonist.
" Good Times " had many meanings. It could be a song written and sung by Dai Petunia, which was included in a specific album; it could also be the theme of a poem written by Shao Changgen; it could also refer to the seaweed food under the banner of Happy Lang. In addition, there were also stories related to the good times in the movie, such as the characters 'experiences in the TV series " Flowing Good Times." In terms of personal experience, good times might be nostalgia for past experiences, such as recalling the innocent years of childhood, or the warm moments in the process of struggle, such as the moment when family members sent milk to you while studying.