Science and Technology Trivia
Plug Trivia
Why do most household appliances such as electric fans, washing machines, refrigerators and other household appliances use three-wire plugs? What is the difference between a three-wire plug and a three-phase plug?
Three-phase appliances refer to three different firewires, the voltage between each of their two wires is 380 volts, generally used for power systems, mostly found in industrial electricity. While household appliances are generally powered by single-phase power supply, its three wires are fire, zero (neutral) and ground, the voltage between the fire and zero is 220 volts, so this is not a three-phase electricity, its plugs and sockets are not three-phase plug and three-phase sockets, the ground for safety.
Fruits with antihypertensive effect
Hawthorn; Hawthorn expands blood vessels, lowers blood pressure, and lowers cholesterol. You can choose wild hawthorn 10 grains (fresh is better), mashed and sugar 30 grams, water decoction is often served, has a good effect of lowering blood pressure, stomach.
Banana; banana contains many vitamins, can clear heat and lower blood pressure, can be eaten often. With banana peel or stalk 30 to 60 grams, decoction soup is also effective. Conditional take appropriate amount of banana flower decoction water, the efficacy is better.
Water chestnut; has the effect of clearing heat and lowering blood pressure. Available fresh water chestnuts (washed, remove mud), jellyfish (washed to remove salt) 30 to 60 grams each, boiled soup, 3 times a day. Both can lower blood pressure and can dissolve phlegm to stop coughing.
Pineapple: Eating pineapple can strengthen the hydrolysis of fibrin in the body, hypertension and edema, thrombosis, etc. There is a good role in improving blood circulation and eliminating edema and inflammation.
Ume: rich in citric acid, malic acid, succinic acid. For hypertension, dizziness and insomnia, nighttime sleeplessness, can take 3 plums with the right amount of rock sugar stewed in water, have a hypotensive, sleep, heat and fluids.
Apple: contains malic acid, citric acid, vitamin A, B, C and other 10 nutrients. Eating apples can improve vascular sclerosis.
Scientific drinking milk knowledge 5
Drinking milk is good for health, but many people drink milk there are some conceptual misunderstandings, now introduce some scientific drinking milk knowledge.
1. Drinking milk on an empty stomach in the morning is not appropriate. Because the human body fast fast gastrointestinal peristalsis, milk nutrients are often too late to be absorbed into the colon. In addition, the method of drinking milk is not desirable, because it will reduce the opportunity to mix in the mouth and saliva, not conducive to digestion and absorption. Before drinking milk, it is best to eat some cookies, pastries, etc., or eat snacks while drinking milk.
2. Drinking milk at night is more favorable. Scientific research has found that the human body in the calcium metabolism will have a special law: the evening, especially at midnight, plasma calcium content will appear a "trough", forcing the body to regulate the mechanism to transport a part of the bone in the calcium to replenish. In this way, although the calcium in the blood is temporarily maintained, the calcium in the bones is reduced. Milk is rich in calcium, so drink a glass of milk before going to bed, can compensate for the body's demand for calcium at night.
3. Milk should not be boiled with sugar. Milk is rich in amino acids, in high temperature conditions in the milk lysine and sugar Mellard reaction, generating a new compound - fructose-based amino acids. This material is not only can not be digested and absorbed by the human body, but also affect human health, the best fresh milk to drink, such as too cold slightly heated.
4. Do not like milk can drink yogurt. The majority of people who are lactose intolerant are those who have an "aversion" to milk, and these people can try to drink yogurt. The lactose content in yogurt is greatly reduced, but almost all the nutrients retained in milk, where lactobacilli can survive and reproduce in the human body, which is conducive to the absorption and utilization of nutrients and improve immunity. Yogurt does not contain antimicrobials, easy to digest and absorb so you can drink on an empty stomach.
5. Yogurt can not be heated to drink. Drinking yogurt mainly eat its nutrition and live bacteria, such as yogurt heating, the human body can only drink to the nutrition but lost biologically active lactic acid bacteria, so do not drink after heating.
Insects harmful to human beings I. Harm of cockroaches Cockroaches, that is, people call the oil-stealing mother-in-law, fragrant mother, slippery insects ......, a variety of different kinds of insects in the society, its official name is cockroach.
This is a global class of insects, widely distributed in the world's five continents and four oceans, especially in the tropics for the prolific. They can be found everywhere in our country....
Cockroaches carapace flat, brown, brown-black, brown, or yellow-brown, with a metallic luster, the head in front of the two slender tentacles, emitting a burst of unpleasant odor. Usually, cockroaches in addition to families, canteens, hotels, hospitals, warehouses, stores camping, stealing food theft, most infested fields, forests, factories, farms and ranches, and even ocean liners, warships, airports, for the damage to the trees, maize, sugar cane, livestock and poultry ...... dozens of crops of agriculture and forestry, cloth and clothing, food and grocery, to human beings, causing economic losses. economic losses.
Cockroaches eat no less than dozens of family food. Particularly fond of starch, sugar, vegetables, and food with high humidity.
In addition, also like to eat Poria, chrysanthemum, angelica and other dozens of Chinese herbs, feces, phlegm, rotting small animal carcasses are also its delicacies. When it is really helpless, it can nibble the paste on the edge of the books and bite the pages; it is also the quill of the red pencil that can be used to feed and sustain its life.
In addition, also often bite bad clothing, drilling into the radio, television, bite bad wire wrapping, and even bite the baby's nails and eyelashes, where they crawl and eat often excrete a lot of dirty feces, leaving a disgusting stench. Therefore, it causes people to hate.
Cockroaches are the transmitters of many human diseases. It is known that cockroaches can carry typhoid bacilli, dysentery bacilli and other dozen kinds of epidemic bacteria.
It is reported that each cockroach's antennae, feet and stomach can contain up to 13,370 bacteria. In addition, cockroaches also carry eggs of human parasites such as hookworms, roundworms and flagellates, which can contaminate food and spread diseases through contact, feeding, and excretion of feces.
In recent years, there are rumors at home and abroad that the feces of American cockroaches are carcinogenic. However, it is worth mentioning that although cockroaches as a whole are the enemy of mankind.
But there are also beneficial species in its camp. We need to protect and utilize them.
Such as a cockroach called "Chinese true soft-shelled turtle", its female is the famous traditional Chinese medicine "soft-shelled turtle", salty, cold and toxic, have broken the blood and expel gangrene to disperse the role of the knot, the main treatment of blood stagnation; amenorrhea and bruises and other diseases. For this kind of species, there are monographs at home and abroad, and there are specialized units or professional households to raise.
As a health pest, cockroach is harmful to human beings, and many health organizations and epidemic prevention departments in the world regard it as an object to be eliminated, and invest a lot of manpower, material and financial resources in the research of its classification, living habits, environmental ecology, prevention and utilization, etc.
Cockroach is a kind of common human being. II. Types of cockroaches The cockroaches are generally regarded as a kind of cockroaches.
In fact, there are no less than 10,000 species of cockroaches in the world. Of these, more than 6,000 species have been studied by scientists and have scientific names.
More than 200 species have been recorded in China. Cockroaches, though, are so diverse and widely distributed.
But what is closely related to the livelihood of human beings, I am afraid, is still mainly the cockroaches living indoors. Indoor cockroaches, as early as 1095 years, Li Shizhen had such a record: "Today's home wall under the stove, very much, even gather to dry hundred, body like silkworm moths, belly and back with red, two wings can fly, like light, its gas is very stinky".
If you look carefully, you will find indoor cockroaches, there are large and small, with long wings and short wings, covered in the head and forehead on the chest on the back of the chest of the large and broad, some of them black, some on the mask with two brown longitudinal bands, some of the composition of the flower spots, patterns, and uneven ...... All these signs are indicating that they are are not of the same kind. Therefore, in its external form shows a dry difference, not quite the same.
Now the study points out that there are dozens of kinds of cockroaches indoor pests. The most common ones are: American cockroach, black-breasted cockroach, Australian cockroach, Japanese cockroach, spotted cockroach and German cockroach.
III, a long history Turning over the family tree of cockroaches, we will be surprised to find that the cockroach's family history. According to the American scientists with C14 on two cockroach fossil test, to determine that they have 300 million years of history.
What a long time that is! At that time, the dinosaurs have not been introduced, and cockroaches have been the subjects of the earth, read the vicissitudes of the world, and the nature of the tenacious struggle to survive. More difficult to make people believe is, 300 million years ago cockroach and today's cockroach, in the form of existing cockroaches, is so the same, the mutation is so weak, can not help but call people sigh: cockroach vitality is how tenacious ah! No wonder it has "insect living fossil" name.
IV. Biological habits: Cockroaches complete a life cycle from egg to adult, which generally takes half a year to more than four years. Although indoor cockroaches have wings, they are not very good at flying, probably in order to escape from the pursuit in the theft, they have developed three pairs of "flying legs", very good at running and crawling.
If there is a race in the insect world, they will definitely take the lead and win the gold medal. Probably ashamed of the sneaky behavior dishonorable it, they are always afraid to see the light, the daytime deep living out, hiding in the dark corners, such as the gutter wall, around the kitchen stove, box wood crevice between the clothes, the pages of the book in the ......, and at night only groups of people out of the activities of the food.
Interestingly, their eggs are laid in a leathery egg sheath, shaped like an old cooked lentil, a closer look at its often ringed. This elaborate tent contains a dozen to several dozen eggs.
Usually the female can lay fourteen or five egg sheaths in her lifetime. Some do "mother" of the deep fear of children before the end of hatching by the invasion of foreign enemies, always hang the egg sheaths in their own belly end, up to two or three weeks, until the inside of the egg block to hatch into a wakame, it is placed in the e799bee5baa6e79fa5e98193e58685e5aeb93133323433333334 a carefully selected safe and comfortable place to let them come to the earth to go alone. them to come to earth to go solo and travel the earth.
V. Indoor cockroach control Indoor cockroaches reproduce fast, the number of large, almost every household in the South, can often be heard people complaining about it, seeking a panacea to annihilate them. Humans in the long-term struggle with cockroaches, has accumulated a number of effective control measures, summarized roughly the following aspects: (1), eliminate the source of insects: to prevent cockroaches, especially the spread of the egg sheath.
(2), artificial capture.
3. Science knowledge for elementary school students Short1, elementary school students should swim under the leadership of adults, learn to swim; 2, do not play alone in the river, ponds; 3, do not go to the non-swimming area to swim; 4, can not swim, do not swim to deep water, even with a lifebuoy is not safe; 5, before swimming to do the appropriate preparatory activities in order to prevent cramps;
Second, drowning when the self-saving Methods:
1, do not panic, and call for help immediately when you find someone around you; 2, relax your whole body, let your body float on the water, float your head out of the water, kick the water with your feet to prevent loss of strength, and wait for rescue; 3, when the body is sinking, you can press the palms of your hands downward; 4, if you have a sudden cramp in the water, and can not be docked, call for help immediately. If there is no one around, you can take a deep breath and dive into the water, straighten the leg of the cramp, and use your hand to wrench the toes upward to release the cramp.
Third, found someone drowning rescue methods:
Method 1: lifebuoys, bamboo poles, planks and other things can be thrown to the drowning person, and then dragged to the shore;
Method 2: If there is no rescue equipment, you can go into the water directly rescue. Close to the drowning person to turn his hips, so that his back to their own and then dragged. Dragging is usually done by side or backstroke.
Special emphasis: minors found someone drowning, can not venture into the water to rescue, should immediately call for help, or the use of life-saving equipment to call for help.
Fourth, the shore first aid drowning
1, quickly remove the mouth, nose in the sludge, weeds and secretions, to keep the airway open, and pull out the tongue, in order to avoid blockage of the respiratory tract; 2, the drowning child lifted up, so that it is lying prone in the rescuer's shoulder, the abdomen is close to the shoulders of the rescuer, head and feet hanging down, in order to make the respiratory tract of the water naturally outflow. But do not delay the time for CPR because of water control; 3, mouth-to-mouth artificial respiration and cardiac massage; 4, contact the emergency center or send the drowning child to the hospital as soon as possible.
4. Science knowledge quotes and aphorismsI'll answer Einstein Genius is one percent inspiration plus 99 percent perspiration.
Mrs. Curie's The weak sit back and wait for the right moment; the strong make the right moment. If you live by your ideals, if you act with integrity and freedom, with courage and perseverance, with honesty and without self-deception, you will be able to achieve the best of all possible worlds.
We should not waste our lives, we should be able to say, "I have done what I could." On the road to fame, it is not sweat but blood that is shed, and their names are written not with a pen but with their lives.
We live our lives happily every day, and do not wait until the days are past to find out what is lovely about them, or to put all our hopes for a particularly agreeable future. The basis of science is a healthy body.
I want to turn life into a scientific dream, and then to turn the dream into reality. We have to eat, sleep, browse, and fall in love, that is to say, we have to be in touch with the sweetest things in life, though we must not succumb to them.
One must have patience, and especially faith. Make life a fantasy, and then turn the fantasy into reality.
The invisible world of mankind is not an imaginary phantom, but an actual existence illuminated by the light of science. Honored is the power of science.
5. Science Quotes and Phrases1. The cause of science is to serve the people.
---- Tolstoy 2, the teacher must have a healthy body, the farmer's hands, the scientific mind, the artistic interest, the spirit of reforming society. ---- Tao Xingzhi 3, Scientific books save men from ignorance, while works of literature and art free them from coarseness; both are equally useful and necessary for true education and for the happiness of men.
---- ---- Chernyshevsky 4. Education! Science! To learn to read is to light a torch; every syllable of every word emits a spark. ---- Hugo 5. It is often more important to ask a question than to solve one.
Because solving a problem may be only a mathematical or experimental skill, whereas posing a new problem requires a creative imagination and marks the real progress of science. ---- Albert Einstein 6. Imagination is more important than knowledge because knowledge is limited, whereas imagination encapsulates the world, drives progress, and is the source of the evolution of knowledge.
Strictly speaking, imagination is a real factor in scientific research. ---- Albert Einstein 7. My success as a scientist ...... is above all: love of science - infinite patience in long contemplation of any problem - diligence in observing and diligence in observing and collecting facts - considerable inventive power and common sense.
---- Darwin 8. For the man of science, diligence is the mother of success. ---- Mao Yisheng 9. Innate talent is powerless without the help of systematic knowledge.
Intuition can solve many things, but not everything. The highest success is obtained when genius and science are combined.
---- Spencer 10. Science is not something that can be achieved without work, and it is true that there is no other way of achieving success in science than by sweating; neither enthusiasm, nor fancy, nor longing with the whole body and mind, can take the place of labor. ---- Herzen 11. Intelligent qualifications, intrinsic energy, a diligent work ethic, and perseverance are other conditions required for success in scientific research.
---- Beveridge 12.Successful scientists tend to be people with a wide range of interests. Their originality may come from their erudition.
Diversity leads to fresh perspectives, while delving too long into a narrow field tends to make one stupid. ---- Beveridge 13. One of the most important things that made me successful in science was my love of science and my persistence in exploring it over a long period of time.
---- Darwin 14. A researcher can live in a bad alley, eat coarse food, wear rags, and can not be recognized by society. But as long as he has time, he can insist on devoting himself to scientific research.
Once deprived of his free time, he is completely ruined and can no longer contribute to knowledge. ---- Cannon 15. Without freedom of thought, there is no science, no truth.
---- Renan 16.Science gives nourishment to the young and solace to the old; she puts the icing on the cake of a happy life, and she protects you in your unfortunate moments. ---- Lomonosov 17. Science can not only "give knowledge to the young and joy to the old", but also make people accustomed to labor and the pursuit of truth, can create real spiritual and material wealth for the people, and can create things that could not be obtained without it.
---- Mendeleev 18. The sensitivity and originality of youth, once combined with the wealth of knowledge and experience of the mature scientist, can complement each other. ---- Beveridge 19. I think, people have two shoulders, should play a role at the same time, I want to use one shoulder to pick up the burden of delivery, scientific knowledge and scientific tools to the hands of master workers; the other shoulder can be used as a ladder for people, so that young people step on the climb to a higher level of scientific peaks.
---- ---- Hua Luogeng 20. pride, fantasy, emotional precocity and intellectual dullness, coupled with the inevitable consequences. Sloth, these are the bane.
Science, labor, practical work. It is this that can bring our sick, prodigal youth to its senses.
---- Goncharov 21. Science is not worthy to be called science if it cannot or will not influence beyond its own people. ---- Planck 22. When the throat is dry, there will be even the sea can also be a drink - this is faith; a wait until the drink, at most, can only drink two cups - this is science.
---- ---- Chekhov 23. want to drink water, as if you can drink the whole ocean - this is faith; wait until the real drink up, a *** can only drink two cups - this is science. ---- Chekhov 24. For those who engage in science, diligence is the mother of success! ---- 茅以升25.Science has no national boundaries, for it is a treasure belonging to all mankind, a torch that illuminates the world, but scientists belong to the state.
Pasteur 26.Science has no borders, but scientists have borders. ---- Pavlov 27.Though science has no borders, the scholar has his own country.
---- Pasteur 28.Learning knowledge should be good at thinking, thinking, thinking again. I became a scientist by this method. ---- Albert Einstein 29.If learning consisted only in imitation, we would have no science and no technology.
---- Gorky 30.To build, one must have knowledge, one must master science. And to have knowledge, one must learn, tenaciously and patiently.
Learn from all, whether from enemies or friends, and especially from enemies. ---- Stalin 31.Socialism is a scientific and cultural society.
To become a deserving member of a socialist society, one should study hard and well and acquire a lot of knowledge. ---- Kalinin 32.On the road of science, there is no smooth avenue to travel; only those who climb hard on that rugged path may reach the glorious summit.
---- Marx.
6. Famous quotes about science knowledgeAll I can say is that this is a great work! Carl Sagan has made significant, far-reaching contributions to many aspects of science and society, and has influenced hundreds of millions of people around the world.
His important research in the field of planetary science was closely linked to the U.S. space program. Carl Sagan was a great astronomer and extraterrestrial life scientist, as well as a great popularizer of science and a Pulitzer Prize winner.
He was the author of many best-selling popular science books, among them Carl Sagan's Universe, a fascinating and beautifully illustrated anthology of multi-authored essays covering the science, education, policymaking, and many related fields to which Sagan dedicated his life. This film is from the highly acclaimed television series of the same name, which he wrote and created.
Chapter 1: The Frontier of the Universe Human exploration of the universe is exciting in retrospect. These explorations remind us that curiosity is a human habit, understanding is a pleasure, and knowledge is a prerequisite for survival.
Because we are but a speck of dust flying in the morning sky in this universe, we believe that the future of the human race depends on how well we understand this universe. ...... CHAPTER 2 THE MUSIC OF THE UNIVERSE Before life was born, the Earth used to be a barren, uninhabited place.
Now, our planet is alive. Why did it become like this? In the absence of life, how did organic molecules with carbon at their core form? How did the first living things arise? How did organisms evolve to be able to reproduce complex, advanced animals like us that are capable of exploring their own mysteries? ...... Chapter 3: The Harmony of the Universe If we lived on an unpredictable planet, we would not be able to understand things, and there could be no such thing as science.
Things change here, and their changes follow certain patterns, rules, or so-called laws of nature. If we throw a bamboo pole in the air, that pole is always going to fall.
If the sun sets in the west, it is always going to rise in the east the next morning. Thus it is possible for us to understand things, we can engage in scientific research and use science to improve our lives.
...... ...... Chapter 4: Heaven and Hell The universe has been damaged before, and we humans are even known for being "good at inflicting disasters on ourselves, consciously or unconsciously". The other planets have preserved their past, and there is ample evidence that they have experienced catastrophes.
It was only a matter of time. What is unthinkable in 100 years may be inevitable in 100 million years.
...... ...... CHAPTER 5 THE MYSTERIOUS RED PLANET The power of Lovell's point of view may lie in making it a prophecy. It is his belief that the Martians built the canal network.
It is even possible that this view could become a definite prophecy: if Mars were to be remodeled, it would be done by humans, and Mars would be another planet that humans could permanently inhabit. The Martians will be we humans ourselves.
...... Chapter 6: The Voyager Story On July 9, 1979, the Voyager 2 spacecraft arrived in the Jupiter system after almost two years of interplanetary travel. The spacecraft is made up of millions of disassembled parts, each with spare parts, so that if one part fails, others take over its function.
The spaceship weighs 0.9 tons, and it would take a very large house to fit it. ...... CHAPTER 7 THE SPINE OF THE NIGHT SKY The Kumbushuman people of the Kalahari Desert in Botswana have a different way of talking about the Milky Way.
They live in an area where the Milky Way is often right above their heads. So they called the Milky Way "the spine of the night sky", as if the sky were some kind of beast, and the people lived in the belly of the beast.
...... ...... Chapter 8: Traveling in Space and Time The beach reminds us of the universe. The fine grains of sand on the beach are essentially uniform in size, having been formed by the impact and friction, erosion and weathering of large boulders over years of wave action, all of which in turn is driven by the distant moon and sun.
The beach also reminds us of time, and that the Earth itself is much older than humans. ...... CHAPTER 9 LIFE OF THE STARS The Milky Way is still an unexplored world full of amazing stars.
Although we have made some preliminary explorations of the galaxy and are encountering some of its stars, a few are similar to the ones we know, and some are weird beyond anything we can imagine. ...... CHAPTER 10 THE END OF EVERYTHING Ten or twenty billion years ago, something extraordinary happened -- the Big Bang, which blew up the universe and created a world of stars, and a world of stars. -The Big Bang, which blew up this universe of ours. Why the Big Bang happened is the greatest mystery to us.
...... CHAPTER XI LETTERS TO THE FUTURE It is our hope that in the not too distant future, in the foreseeable age of the universe, we will accomplish the great work of peacefully unifying our planet into one body that cherishes every living being on our celestial body, and then take the next great step with aplomb in transforming this planet, the Earth, into a planetary society capable of interconnecting with interconnectedness of all civilizations as a part of the galactic society. ...... CHAPTER XII THE GALACTIC ENCYCLOPEDIA Someday, on some planet in some distant star, a being so different from each of us may ask us to send them the latest edition of the Galactic Encyclopedia, in order to obtain some information about this newest society which has just joined the galactic civilization***somewhere! .
CHAPTER 13 APPEAL FOR EARTH Because we are localized incarnations of the universe that have produced self-awareness, we are already thinking about our origins. We are thinking y about the planetary matter of other planets, a collection of 1028 atoms, and we are exploring the evolution of the atoms, and are tracing the long journey of the emergence of consciousness.
We should be loyal to all of humanity, to the whole planet. It is we who must speak up for the planet.
Maintaining the survival of humanity is a responsibility not only to ourselves, but also to the universe, the ancient, vast universe that gave birth to us. Filed under: Science and Technology.