Elements and compounds in biological cells
The elements and compounds in biological cells were as follows: 1. ** Elements in cells ** - ** Element classification **: According to whether it exceeds 1/10000 of the fresh weight of the cell, it can be divided into major elements (such as C, H, O, N, P, S, K, Ka, MG, etc.) and trace elements (such as FeMn, BMn, ZN, Mo, Cu2, etc.). The most basic element is C, and the basic elements are C, H, O, and N. The first four elements in the fresh weight ratio of human cells were O>C>H>N, and the first four elements in the dry weight ratio were C>O>N>H. - [Source and form of existence of elements: The elements in cells are selectively absorbed from the organic nature, and most of them exist in the form of compounds.] - ** The relationship between the living and non-living worlds in terms of elemental composition ** - [Unity: The elements that make up organisms can be found in the organic nature, and there is unity in the types of elements.] - ** Discrepant **: The amount of the same element in the biological and non-biological world is very different. The reason is that organisms selectively obtain various substances from the organic nature to form themselves. - ** Misunderstanding about the elements in the body of living beings ** - Whether it was a large amount of elements or a small amount of elements, they were very important to maintain the life activities of organisms. It could not be assumed that large amounts of elements were important and small amounts of elements were not. - The most abundant element in living cells was O, not C (the most abundant element in dry cell weight was C). 2. ** Compound in cells ** - ** Category **: It can be divided into two types: mineral compounds (water, mineral salt) and organic compounds (sugar, fat, protein, and DNA). - ** Relationship of content **: The compound with the most fresh weight content is water, the organic matter with the most fresh weight content is protein, and the compound with the most dry cell weight is protein. 3. ** Detection of sugar, fat, and protein in biological tissues (experimental focus)** - ** Detection Principle ** - ** Carboids **: reducing sugar + Fehling reagent → brick red precipitations; starch + iodination → blue. - ** Fat **: Fat + Sultan III dye solution → orange; Fat + Sultan IV dye solution → red. - ** protein **: protein + biuret reagent → purple. - ** Experimental Detection Steps ** - ** Testing of reducing sugar **: Inject 2mL of the tissue solution to be tested into the test tube, and inject 1mL of Fehling's reagent (mix the solution A and solution B evenly before injecting). Put the test tube into a large beaker filled with warm water at 50 - 65 ° C and heat it for about 2 minutes before observing the color. - ** Fat Detection **: Prepare the slices (the thinner the slices, the better), place the thinnest peanut slices in the center of the glass slide, dye (drip 2 - 3 drops of Su Dan III dye solution onto the slices →2 - 3 minutes later, absorb the dye solution → drip 50% alcohol to wash off the floating color → absorb excess alcohol), prepare the slices (drip 1 - 2 drops of water onto the material slices → cover the glass), and perform microscopic examination for identification (use the microscope to light up → low power microscope observation → high power microscope observation of the fat granules dyed orange). - ** Detection of protein **: Add 2mL of sample solution into the test tube, add 1mL of 0.1 g/mL of biuret reagent and shake well, add 4 drops of 0.01 g/mL CuSO4 solution of biuret reagent and shake well, then observe the color change (purple). At the same time, it should be noted that only the detection of reducing sugar required heating; the detection of fat required the use of a microscope; the detection of protein required the addition of biuret reagent solution A, and after shaking it up, drip solution B; Fehling reagent and biuret reagent could not be used instead. Read more exciting novels for free
Where is the most authentic Henan mutton soup?
In Henan, different regions had their own unique mutton soup that was considered authentic. Luoyang's mutton soup was relatively famous. Luoyang was known as the capital of soup, and its mutton soup culture was rich. For example, Hancheng mutton soup was a traditional snack in Hancheng Town, Yiyang County, Luoyang. It belonged to Henan cuisine and had the characteristics of fresh, fat, clear, and spicy. It was commonly eaten by soaking bread, braising meat, or adding vegetables. It enjoyed the top position of the "Top Ten Famous Snacks" in Luoyang. In addition, Luoyang also had a popular mutton soup shop like Sandan's. Every day, they used local goats to cook and cook. The soup was milky white and delicious. The mutton soup in Xuchang was also unique. The methods of making mutton soup here could be divided into choking pot mutton soup (represented by Zhang Di mutton soup and Lao Hu's family) and mutton soup (represented by Tie Dan, Wu Lao Da, Hai family, etc. in the Urban area). Each mutton soup had its own characteristics and the method and taste were similar. Lingbao mutton soup was also a classic traditional snack in Henan. Although its origin was difficult to trace, in Lingbao, mutton soup was not only a food, but also a culture. "Warrior Sage!" The novel is equally exciting. Everyone is welcome to click and read it!
How to shoot a video of someone who doesn't deliberately look at the camera
Here are some ways to shoot a video without looking at the camera: 1. ** Using posture and expression ** - If her facial features were exquisite, she could close her eyes and tilt her head. Her eyes were relaxed and her mouth was slightly open, giving her a youthful and girlish look. - When shooting from the front, lower your head slightly and open or close your eyes. This way, your face will appear small and the shot will look natural. - When shooting in an open space, bend down slightly and stand up, naturally looking forward and slightly sideways to create a sneak shot. - When shooting close-up shots with closed eyes and nervousness, hold a simple and small prop to distract your attention. 2. ** With the help of the scenario ** - Take more big scenes and use the sense of distance to weaken the character's expression in the picture, such as sitting on the road and shooting from a distance. - Relying on objects in the scene, such as leaning against walls or trees, let the characters relax and interact with the scene. 3. ** Dynamic Shooting ** - When she moved, the photographer would take a picture of her. For example, she would spin in a dress. Her long hair and limbs would make the picture full of beauty. 4. ** Shooting Techniques ** - He could use the mirror to see himself in the camera and then use his phone to shoot. - Turn on Apple Movie mode to create a blur effect, but don't turn it too big to avoid distortion. When shooting indoors, you should pay attention to finding the light position. Use pillows and other items to fill the light, so that the light looks more natural. - When shooting on the windowsill, you can look out of the window, or lean against the windowsill with your eyes closed and smile like a pair of scissors. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The Demon's Level System
There were many ways to divide the demon hierarchy: - In one system, demons were divided into nine ranks, and each rank would automatically have the inherent skills of that rank. If a demon wanted to level up, they had to upgrade all their skills to the next rank and be certified by the world's will before they could level up. Moreover, devouring their own kind would give them the dark matter (experience points) needed to level up. Demons of rank 5 and above had to be reviewed. - According to the description in the Hell's Dictionaries, there were different levels of demons, such as Hell King, Hell Duke, and Hell Earl. Different levels of demons were in charge of different positions, such as military affairs, administrative affairs, and demon ambassadors stationed in various countries in the human world. - Demonologists divided the demons into 666 legions, each of which contained 6666 demons, ruled by 66 Demon Kings, and had a total of 4439622 demons. - Another system mentioned that demons were divided into Abyssal Demons, Demon Lords, Revelations Demons, Chaos Demons, Primal Demons, and so on. Abyssal Demons were the kings of demons and were at the peak. Together with Demon Lords, they were called Greater Demons. These two types of demons were divided into two types: natural and evolved, each with different abilities and characteristics. While waiting for the TV series, you can also click on the link below to read the classic original work of "Dafeng Nightwatchman"!
What does it mean to read it?
The pronunciation of the word "vigorous" was "chuō léfèn fā". It meant to describe one's spirit being lifted and one's spirit being lifted. While waiting for the TV series, he could also read the exciting content related to this site!
The novel where the male lead appeared behind him and was still sweating
In " I Was Reborn After Becoming a Widow," it was mentioned that the female protagonist despised her husband and lay on the bed with sweat all over his body. The male protagonist in the text could be seen as such an image in the text. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The content of the recommended text for the whole book in the third grade of primary school
The recommended reading list for the third grade of primary school included classic fairy tales and other literary works. In terms of classic fairy tales, there were Andersen's Fairy Tales (by Hans Christian Andersen of Denmark), Grimm's Fairy Tales (by the Grimm Brothers), and Scarecrow (by Ye Shengtao). Other recommended books include Traveling in a Cow's Belly (by Zhang Zhilu), The Old House That Never Fell (by Ci Qi), Mr. Carrot's Long Beard (by Wang Yimei), A Story with Three Endings (by Italy's Luo Dali), etc. In addition, there were also prose works such as Bird on a Boat (by Guo Feng), Golden Grass (by the Soviet Union's Prish), Father, Forest and Bird (by Niu Han), Thorny Friend (by Sosuke Hua), etc. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The Strongest Goddess System: Male Becoming a Goddess
The following were some recommendations for novels that turned men into goddesses: " The Beautiful Woman of Transformation ", where the main character turned into a girl and started the story with the theme of cultivation and daily life. The style was relaxed and interesting." The Playwrights of the Goddess of Transformation ", where the main character dressed up as a high school student, with the goal of conquering the world with the script, was full of funny elements." The Female Abbot of Transformation ", which told the story of a loli Taoist priest turning into a female abbot of Taoism through the system, was full of humor. In " Two Thousand Years of the Poor Ghost," the main character experienced the Battle of Changping and so on, and was a female. In " The Age of the Transformed Heroine," the main character's gender changed to a female after transmigrating and even became a widow. In " Miss Transformed Knight," the main character had a gender change after being born in a specific story background. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
A novel recommendation about the double lights
There was a short story in classical Chinese," Double Lights," written by Pu Songling, which told the story of the scholar Wei Yunwang and the fox girl. Wei Yunwang's family fell from grace and abandoned his studies to become a businessman. He became attached to the fox girl and the two separated after half a year. There was also Wang Zengqi's "New Liaozhai," which had a modern sense. In the story, the two children fell in love with the demoness at first sight, and the demoness left gracefully. In addition, Wang Haichun had a collection of novels, Double Lights, which included some of his short novels since he started writing. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
How much is a 1.5-meter Simmons?
1.5 The prices of Simmons mattresses varied greatly, ranging from 100 yuan to 480 yuan. Some were sold for 280 yuan, while others were sold for as low as 55.77 yuan. Had he not watched enough of Long Lovesickness 2? Hurry up and read the original work of " Everlasting Lovesickness 2: A Vow of Love "!
Crossing the sea of people just to hug you, what song is it?
'Crossing the Sea of People Just to Embrace You' was a song from the original track of Wen Xin. The lyrics were written by Jieximi (Liu Jie) and Lin Qiao, and the song was composed by Jieximi. "Hugging You in the Wind of the City" was equally exciting. Everyone was welcome to click and read it!