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NdFeB magnets can be divided into bonded NdFeB and sintered NdFeB. Meank Magnetics tells you the difference between the two from the following aspects
Ingredient:bonded ndfeb contain less neodymium and more iron,bonded neodymium magnets containing PPS or PA or epoxy.
Technology:bonded NdFeB is made from NdFeB magnetic powder with binder.In fact,bonding is injection molding.Sintered neodymium magnet is formed by vacuum heating at high temperature.Sintered NdFeB magnet material adopts powder metallurgy technology.
Structure:sintered neodymium magnets are crystal structure and plastic bonded neodymium magnets are non-crystal structure.
Performance:sintered neodymium magnet is much higher, about four times higher than bonded neodymium magnet.
Characteristics:bonded NdFeB is suitable for some thin, small, special-shaped products.Such as thin-walled motor ring
Welcome you contact us for more information about bonded NdFeB and sintered NdFeB.
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Ningbo Beilun Meank Magnetics Co., Ltd is located in the home of Neodymium-Iron-Boron magnets -Ningbo City, we engaged in production of rare earth neodymium magnets over 10 years.
The wedding dress is not necessarily pure white. The requirement that the bride's whole body and headdress should be snow-white began in the Victorian Queen's era. At that time, white represented happiness, and later strengthened the meaning of holiness and loyalty, which made the remarried women not wear pure white wedding dress, and even formed the noble status of pure white wedding dress.
In fact, the color of the wedding dress is not important, but to match the color of the bride's skin. Asians have dark and yellowish complexion. Ivory color is more harmonious and natural. Blue and purple are generally not in harmony with yellow skin. On the contrary, orange and green can match yellowish complexion. As for brides with red skin or bronze skin, pure white looks good.
Prior to this, Greece also used "white" as the most common color of bridal dresses, but not strictly to the whole body of snow-white; in ancient Rome, brides would wear yellow veils; in traditional China, red dresses were the symbol of auspiciousness; in the early twentieth century, the silver wedding dresses were to highlight the noble status of the Royal family, which shows that the wedding dress is suitable for its "color", and there is no special requirement to wear pure white wedding dress.
There are many kinds of wedding dress colors, the most common are: pure white, ivory white (also light ivory, dark ivory), cream white, champagne (also light champagne, dark champagne) with the changing trend of fashion, in recent years also increasingly popular pink, pink orange, pink purple, pink green and light silver grey wedding dress, which are all very soft and pleasant to the eye; as for the most popular, of course are white, ivory or champagne.
Below is a detailed analysis of these colors for you.
Pure white:
The bride's head dress and head dress are short white satin dress, which originated from the ancient tradition of the Victorian Empress. In fact, it doesn't matter what color the wedding dress is. The most important thing is to match the color of the bride's skin. Asians generally have dark and yellowish complexions. Wearing ivory wedding dresses will make the whole look harmonious and natural. As for those brides whose skin is white and red, wearing pure white wedding dress will also be very beautiful. In addition, the general long drag and gauze series of wedding dresses, pure white will be more prominent;
Ivory/pearl white:
In recent years, more and more couples choose ivory/pearl white, which has become the preferred color of fashion wedding dress. This color continues the white tone and color symbol, while changing the shortcomings of stereotype in traditional wedding dress and the monotonous color. Soft Ivory light shows elegant and noble temperament of the hostess. That's the reason why the price of ivory is slightly higher than pure white though fabrics of texture is the same;
Colored:
It is seldom used in China and is generally used in wedding photography. But light pink and tender green is also a choice of personality. But the blue and purple wedding dresses are generally not in harmony with the yellow-skinned Chinese; on the contrary, the orange and green wedding dresses are more compatible with the Oriental skin color. Because the sales of wedding dresses with coloured embroidery are very small, fabrics need to be purchased specially.
Will Raise the front of your truck by a true 2.25inch.
Fits Chevrolet Silverado 1500.
Easy Install: No Cutting, Drilling, or Spring Compression Required.
Improves the look of your truck and increases ground clearance, allowing you to fit larger custom rims and tires.
Specification:
Part Number: LK-220-C
Front Lift Height: 2.25 inch
Item Weight: 1.8KGS
Finish Color: Silver
Position: Front
Fitment: Chevrolet Silverado 1500(Not Designed to be used with Stamped Steel Control Arms)
Material: This Leveling Lift Kit is CNC machined out of billet aluminum.
Simple bolt install. There is no cutting, drilling, or spring compression required to use this leveling kit. The 2.25" Leveling Kit is exactly what you need to level your front leveling kit silverado. If you're looking for the best possible results while maintaining your factory ride this kit is for you. It's the safest way to provide a mild lift and you're guaranteed to have the same ride as the factory provided.
The new technology for advanced dynamic 3D roll forming can produce profiles with asymmetrical cross-sections both in depth and width, allowing for an immense variety of shapes through a rotational and traversing movement of all the roll forming heads. In contrast to many other processes, the sheet metal is not thinned out during roll forming.
A numerical control system allows you to manage the more than 100 dynamic axes of the variable section roll formers, and the operator can freely program the machine, obtaining the requested section variations. One of the reasons that the method is so valuable for manufacturers is that machines are designed to be used with cold forming steel at very high strength levels. In fact, the higher the strength of the steel the more suitable it is for roll forming.
3D roll forming can be applied to low thickness materials (1.0mm), for the construction and automotive sector, and also to high thickness materials (up to 11.0 mm) for the transport sector (beams of lorries, trailers)
We also provide cold roll forming machine for such technologies involving:
3D roll forming technology changes your perception of profiles, by introducing an additional degree of freedom in the roll forming process.
Cold-formed steel refers to a finished steel product of various cross-sectional shapes bent by a steel plate or a strip in a cold state. Cold-formed steel is an economical thin-section thin-walled steel, also known as steel-refrigerated curved or cold-formed profiles. Cold-formed steel is the main material for making lightweight steel structures. It has a variety of extremely thin, well-shaped and complex sections that cannot be produced by hot rolling. Compared with hot-rolled steel, the radius of gyration can be increased by 50-60% and the moment of inertia of the section can be increased by 0.5-3.0 times in the same cross-sectional area, so that the material strength can be used reasonably; That is to say, compared with the traditional steel structures made of I-beam, channel steel, angle steel, and steel plate, it can save about 30 to 50% of steel.
(1) Large-scale cold-formed steel: the thickness of the product is 6-16mm, and the product has a width of 600-2000mm.
(2) Medium-sized cold-formed steel: the product thickness is 3-6mm, and the product expansion width is 200-600mm.
(3) Small cold-formed steel: the product thickness is 1.5-4mm, and the product expansion width is 30-200mm.
(4) Wide-width cold-formed steel: the thickness of the product is 0.5-4mm, and the product has a width of 700-1600mm.
(1) Universal open-formed cold-formed steel with equilateral and unequal angles, inner and outer bead angles, equilateral and unequal channel steel, inner or outer bead channel, Z-beam, coil Side Z-shaped steel, special shaped open-section steel, etc.
(2) Closed cold-formed steel is a cold-formed steel with a closed section of welded shape, which is round, square, rectangular and shaped according to its shape.
Different industries have different requirements for cold-formed steel. The production of cold-formed steel can meet the different requirements of various industries and produce various special cold-formed steels. The main items can be listed below.
(1) Cold-formed steel for automobile manufacturing; small passenger cars, mostly with irregular-shaped open-shaped steel, such as windows, rain gutters, seat machine pulleys. Most of the buses use closed rectangular steel, and most of the freight cars use open-cold steel; special vehicles such as fire trucks, engineering vehicles mostly use rectangular and shaped cold-formed steel. Bosj offerred cold roll forming machine can meets all kinds of industry requirements.
(2) Railway vehicles: Most of the passenger cars and freight vehicles use special shaped cold-formed steel, for example, cold-formed middle beams instead of hot-rolled middle beams. Open for a long time.
The middle beams used in the chassis of the car, the caravan, and the tanker are all hot-rolled steel-welded welded structures. They are welded by two hot-rolled sheets of steel with a height of 310. Since the middle beam is welded with a hot-rolled steel, it exists. The utility model has the advantages of large weight, high welding quality requirement (need to be non-destructive testing), and high comprehensive cost. Therefore, the railway department hopes to develop a high-efficiency cold-formed steel with integral shape, lightweight, high strength and good rigidity instead of hot-rolled steel. The cold-formed middle beam developed by WISCO uses hot-rolled coiled sheets as raw materials, and the integral middle beam is obtained by continuous molding. Another example: Qiqi Group developed cold-formed steel for end wall transverse belts and hat-shaped steel side columns in 1985. In 1993, cold-formed steel for upper side beams of rectangular tubes with sharp corners was developed. The material is cold-formed steel 09CuPTiRE-A The yield strength is 295 MPa. The application of cold-formed steel in China's railway wagons will be more and more.
(3) Elevator: hollow guide rail for the elevator, structural frame for the automatic elevator and cold-formed steel for other special-shaped members
(4) Shelf: Cold-formed steel for small supermarket shelves and large warehouse-style supermarket shelves.
(5) Transmission tower: Focus on the study of replacing the traditional hot-rolled angle steel with cold-formed steel to improve the overall performance of the tower and reduce costs. In the high-voltage long-distance transmission tower, high-strength and anti-corrosion structural steel pipes have been tried in various places. The triangular tower structure made of cold-formed steel for the communication tower is also under development.
(6) Construction machinery: crane lifting arm, support arm, cold-formed steel for tower crane frame.
(7) Electrical equipment manufacturing industry: electrical cabinets, cold-formed steel for cable trays.
(8) Agricultural machinery: cold-formed steel for tractors, plows, hoes, and harvesters, and cold-formed steel for agricultural vehicle beams.
(9) Construction industry: steel structure (beam, column) maintenance structure, roofing, wall, door and window, cold-formed steel for decoration.
If you want to know the coil forming machine, coil processing machinery and coil rolling machine.As one of the best coil former manufacturers ,we can tell you about coil forming.
1, single pole magnets are widely used in the printing industry, in gift packaging boxes, mobile phone packaging boxes, tobacco packaging boxes, mobile phone packaging boxes, MP3 packaging boxes, moon cake packaging boxes and so on products, there are single sided magnets or single pole magnets exist.
2, Leather goods industry widely use mono pole magnets, in bags, briefcases, travel bags, mobile phone sets, wallets and so on, there are mono pole magnets exist，that is magnetic buttons.
3, Stationery industry widely use single pole magnets, in notebooks, whiteboard buttons, folders, magnetic nameplate and so on, there are single sided magnets or single pole magnets exist.
Ningbo Beilun Meank Magnetics Co., Ltd is located in the home of Neodymium-Iron-Boron magnets -Ningbo City, we engaged in production of rare earth neodymium magnets over 10 years.
Many brides-to-be in the choice of cheap couture wedding dresses, the demand will be more messy, but also more blind, do not know how to choose. In fact, the classification of wedding dress has several dimensions: contour, collar type, trailing length.
Combining these three basic dimensions, and then according to their own size and temperament to choose, you can quickly pick out the perfect wedding clothes for your own ~
Here is a brief introduction to the type of wedding dress with these three dimensions.
The first dimension is Silhoustte the of the wedding dress.
Dimensions are the best places to decide on a wedding dress. The main types are: Shrath, Ball Gown, Mermaid/Trumpet, A-line, Empire, Short. Among them, tight skirts, fishtails and short skirts are more demanding on the body. They are more attractive styles, so they are relatively niche, especially mermaid style wedding dress, which can show women's beautiful lines and easy to enlarge the weakness of the figure. The A line wedding dresses are the most easily accepted by the public and is the least error-prone. The Ball Gown wedding dress is the most princess, and it is also a style that many girls can't give up, but this one is not suitable for petite girls.
The second dimension is the collar
If the collar of the wedding dress is subdivided, there are countless. With the development of wedding fashion, the collar shape of the wedding dress is more and more diverse and more and more exaggerated. Here are a few more common and popular wedding dresses.
Strapless: Strapless wedding dress is suitable for small breasted brides who like to show off their shoulders. They can reveal sexy clavicle.
Sweetheart: Sweetheart neckline wedding dress is suitable for bride who is sweet and has a chest.
Off the Shoulder: Off the shoulder wedding dress is more versatile and less attractive. It can be elegantly exposed to the collarbone and stretch the shoulder line without being too exposed. It is a popular collar type this year.
High Neck: This type of high neckline wedding dress is more attractive. First of all, it is not suitable for brides with short necks. The curve of the neck is second, and the other is that people with more elegant temperament will wear this type of collar.
V-Neck: The traditional V-neck is not suitable for a small breasted bride, but it will be relatively sexy. However, many wedding dresses on the market have improved the V-neck, either by adding a layer of tulle in the V-neck low opening, or by combining the V-neck and the heart-shaped collar. This V-neck wedding dress is also very suitable for small The girl in the chest wears.
Illusion: The so-called transparent collar, that is, on the basis of the tube top, adding a layer of tulle above the chest, or with lace cutouts or other beading embellishments, etc., gives a looming The little sexy adds to the practicality of the wedding dress, making the bride wearing a wedding dress more secure.
PORTRAIT: This collar is characterized by a shoulder that is wrapped. The sleeveless version is suitable for the bride who slips the shoulder, while the sleeves can achieve the effect of covering the arm.
HALTER: This type of collar is more suitable for taking pictures, often with a fishtail wedding dress. Suitable for girls with a wide S-shaped shoulder.
JEWEL: It features a small neckline and a rounded shape. It is similar to T-SHORT. It is a conservative style. It is suitable for girls with small breasts. It can also be worn very elegantly with satin.
The third dimension is the trailing length
The final dimension is to classify the wedding dress according to the length of the trailing tail. The length of the tail is a factor that is crucial to the sense of ritual.
Floor length wedding dress:
This is a wedding dress that the dress flats with the floor lengtth. This type of wedding dress is relatively neat.
Small trailing wedding dress: trailing length within 1 meters are small trailing. The sense of ritual is enhanced while facilitating walking and activity.
Big trailing wedding dress: Trailing length is more than 1.5 meters (from the ground). This type of wedding dress ritual is the strongest, usually in the course of the ritual wear. With nail beads, lace decoration of the big trailing will be heavier, preferably assisted by flower children, otherwise the action will be more difficult.
Ultrasonic cell crushing apparatuses convert electric energy into sound energy through transducer. This kind of energy changes into dense bubbles through the liquid medium, and these bubbles burst rapidly, thus playing the role of breaking cells and other substances.
Principle
The principle of ultrasonic cell crushing apparatuses is not very mysterious and complicated. In short, it transforms electric energy into sound energy through transducer, which is transformed into dense bubbles through liquid medium. These bubbles burst rapidly, thus playing a role in breaking up cells and other substances.
Ultrasound is a kind of elastic mechanical wave in material medium. It is a kind of wave form. Therefore, it can be used to detect physiological and pathological information of human body, that is, diagnostic ultrasound. At the same time, it is also an energy form. When a certain dose of ultrasound is transmitted in the organism, through the interaction between them, it can cause changes in the function and structure of the organism, that is, ultrasound biological effect. The main effects of ultrasound on cells are thermal effect, cavitation effect and mechanical effect. Thermal effect: when ultrasound propagates in the medium, the friction hinders the molecular vibration caused by ultrasound, and transforms part of energy into local high heat (42-43 ℃), because the critical lethal temperature of normal tissue is 45.7 ℃. However, the sensitivity of tumor tissue is higher than that of normal tissue, so the metabolism of tumor cells is blocked at this temperature, and the synthesis of DNA, RNA and protein is affected, thus killing the cancer cells while the normal tissue is not affected. Cavitation effect: under ultrasound irradiation, vacuoles are formed in the organism, and mechanical shear pressure and turbulence are produced along with the vibration and violent explosion of vacuoles, resulting in tumor bleeding, tissue disintegration and necrosis. In addition, when the cavitation bubble breaks, it will produce instantaneous high temperature (about 5000 ℃), high pressure (up to 500 × 104pa), which can make the water vapor dissociate and produce OH and H. The redox reaction caused by OH and H can lead to polymer degradation, enzyme deactivation, lipid peroxidation and cell killing. Mechanical effect is the primary effect of ultrasound. In the process of ultrasound propagation, the media particles alternately compress and expand to form a pressure change, causing cell structure damage. The killing effect is closely related to the frequency and intensity of ultrasound.
Key points for purchase
The ultrasonic generator
The signal generator generates a signal of a specific frequency, which is the frequency of the transducer. Generally, the ultrasonic frequency used in the ultrasonic equipment is 20kHz, 25kHz, 28kHz, 33khz, 40KHz, 60KHZ.
Transducer assembly
The transducer assembly is mainly composed of transducer and horn.
Loudspeaker box
It can effectively reduce the noise produced in the process of work, which can keep the laboratory quiet.
The application of ultrasonic cell crushing apparatuses in our country is in the mature stage, but the application is still not popular. The application range of this instrument (equipment) is very wide, which is incomparable with other instruments and equipment. Therefore, the market potential of the instrument (equipment) is great, and manufacturers are increasing. At the same time, it also causes the relative chaos of ultrasonic cleaning industry and market, which can be described as "a mixture of good and bad".
Shenzhen XZBELEC Inst. & Eqpt. Co., Ltd company is established in 2011, Shenzhen xinzhibang Inst. & Eqpt. Co., Ltd is a professional enterprise of instruments and meters.
The principle of ultrasonic processor is not too mysterious and complicated. In short, it converts electric energy into sound energy through a transducer. This kind of energy changes into dense bubbles through a liquid medium (such as water). These bubbles burst rapidly, thus breaking up cells and other substances (commonly known as "cavitation effect").
The main effects of ultrasound on cells are thermal effect, cavitation effect and mechanical effect. Thermal effect: when ultrasound propagates in the medium, the friction hinders the molecular vibration caused by ultrasound, and transforms part of energy into local high heat (42-43 ℃), because the critical lethal temperature of normal tissue is 45.7 ℃. However, the sensitivity of tumor tissue is higher than that of normal tissue, so the metabolism of tumor cells is blocked at this temperature, and the synthesis of DNA, RNA and protein is affected, thus killing the cancer cells while the normal tissue is not affected. Cavitation effect: under ultrasound irradiation, vacuoles are formed in the organism, and mechanical shear pressure and turbulence are produced along with the vibration and violent explosion of vacuoles, resulting in tumor bleeding, tissue disintegration and necrosis. In addition, when the cavitation bubble breaks, it will produce instantaneous high temperature (about 5000 ℃), high pressure (up to 500 × 104pa), which can make the water vapor dissociate and produce OH and H. The redox reaction caused by OH and H can lead to polymer degradation, enzyme deactivation, lipid peroxidation and cell killing. Mechanical effect is the primary effect of ultrasound. In the process of ultrasound propagation, the media particles alternately compress and expand to form a pressure change, causing cell structure damage. The killing effect is closely related to the frequency and intensity of ultrasound.
Shenzhen XZBELEC Inst. & Eqpt. Co., Ltd company is established in 2011, Shenzhen xinzhibang Inst. & Eqpt. Co., Ltd is a professional enterprise of instruments and meters.
The Application of Rubber Magnets on Fridge Magnets
Fridge magnets are daily hanging decorations, generally used in decorative, add color to the dull refrigerator.Beside of decorations, fridge magnets can also used as memorandum, that is small note. For example, vegetables or other food in the fridge what need to buy, you can write down on paper, and then hold on it through the magnetic stickers.
Fridge sticker divided into two types, one is magnetic sticker, the other one is adhesive sticker.Adhesive stickers are one-time,the magnetic sticker can be repeat used, magnetic sticker can keep the fridge tidy. Because of the advantages of magnetic sticker,more and more magnetic sticker are used today. The magnetic stickers are just fridge magnets, which made from flexible magnetic sheet or rubber magnets. Fridge magnets mainly divided into PVC flexible rubber fridge magnets and copperplate paper printing fridge magnets, on the back of the fridge magnets, general stick with metal magnet or rubber soft magnets. If you want to buy rubber magnets,we can provide rubber magnets for sale.
Fridge magnets include the following types:
1, Magnetic refrigerator sticker: rubber magnet + top coated paper color printing made of peritoneum
2, Thermometer refrigerator sticker: soft rubber magnet + four-color printing coated paper mounted film + thermometer
3, Magnetic Bookmarks: adopt the soft rubber magnet + above four-color printing coated paper produced by peritoneal fold
4, Magnetic message board: the board (or board) + rubber magnet coated paper printing laminating film + light erasable pen
5, Magnetic photo frame: using soft magnet mounted coated paper color printing peritoneal, intermediate punching photo produced. And according to the requirements of the customers,made into double PVC photo frame, photo frame, photo frames made of various materials such as cardboard
6, Magnetic Memo Pad: magnetic pad rubber magnet + top mounted light coated paper printing film + notes this, or a separate pad, the convenience
7, Magnetic puzzle puzzle board: bottom soft rubber magnet (grey board or cardboard) + top four-color printing coated paper laminating film, intermediate cutting need to make small puzzle design.
8, PVC soft rubber fridge sticker: using PVC soft rubber dispensing pattern backed magnet
9, Glass refrigerator sticker: adopt the rubber magnet + top coated paper color printing + semi-circular glass window made of peritoneum
10, Epoxy refrigerator sticker: rubber magnet + top coated paper color printing + glue made of peritoneum.
Ningbo Beilun Meank Magnetics Co., Ltd is located in the home of Neodymium-Iron-Boron magnets -Ningbo City, we engaged in production of rare earth neodymium magnets over 10 years.
Rubber shock isolator is rubber-based isolator. It is characterized by low bearing capacity, large rigidity and creeps effect. The damping coefficient is 0.15-0.30. It can be made into various forms so as to freely select the rigidity in three directions. It is mainly used for machine vibration isolation. When the load is large, it is made of pressure bearing type; when the load is small, it is made of sheer type.
Rubber shock isolators can be divided into compression type, shear-type and compression shear type.
(1) compressed rubber stock isolators
Generally, this type of wire vibration isolator can bear a large load, and it is often used in places with a large load or small space size of installation position. The compression type can also be made into a variety of shapes and structures to meet the requirements of various working conditions, such as circular, square and other shapes, external convex or internal concave, and the middle can also have openings or interlayer, etc.
(2) shear type rubber stock isolators
This kind of wire rope vibration isolators are mostly used in the situation of low stiffness in the main direction of action, or in the mechanical vibration isolation with a light load and low speed, and their vibration isolation effect is good, but their stability is slightly poor. Shape and structure can also be diversified.
(3) rubber shop isolators
This kind of isolator is a kind of compression rubber shock isolators placed obliquely. Its structural shape is changeable, and its internal and external shape is different. The stress angle is mainly pressure and shear. It is often used in the situation of high requirements for vibration isolation and stability. Sometimes, it needs three-way equal stiffness vibration isolators, which are mostly solved by combining the structure shape.
The application and characteristics of rubber stock isolators
Rubber shock isolators are wire rope vibration isolator with metal parts as the framework, rubber as the elastic element and vulcanized and bonded together, so they are sometimes called metal rubber shock isolators, which are the most widely used vibration isolators at present, mainly used for the vibration isolation of general mechanical equipment (fans, compressors, water pumps, air conditioning units, etc.) and various engines; automobile, train, urban rail transit. Traffic equipment such as communication, aircraft and ships can not be separated from rubber shock isolators; Some stamping and forging equipment also use rubber shock isolators to isolate vibration.
The main features of rubber stock isolators are as follows:
(1) the shape and size can be freely selected, the manufacturing is relatively convenient, and the hardness change is easy to adjust. The rigidity in three mutually perpendicular directions can be arbitrarily selected according to the needs, and the rubber shape, internal and external structures can be changed to adapt to the needs of greatly changing the rigidity and strength.
(2) rubber material has proper damping, which can absorb vibration energy, especially for high-frequency vibration energy. It is obvious that the absorption is above 30Hz. When the vibration machine equipped with rubber shock isolators passes through the resonance area, even when it is close to the resonance area, it can be used safely without excessive vibration, so there is no need to configure another damper.
(3) rubber shock isolators can significantly reduce the high-frequency structural noise (generally, it can reduce the structural noise in the frequency band of 100-3200hz to about 20dB), which is very beneficial to the control of noise.
(4) the effect of impact resistance is also good.
Introduction to Preparation of Culture Media of Microbiology
The culture media of microbiology is a mixed nutrient for the growth, reproduction and metabolism of microorganisms. Because microorganisms have different types of nutrition, different requirements for nutrients, and different research purposes, there are many kinds of culture media and different raw materials. But in terms of nutrition, bacterial growth media generally contains carbon source, nitrogen source, inorganic salt, auxin, water and so on. In addition, culture media of microbiology has appropriate PH Value, buffer capacity, redox potential and osmotic pressure. In order to meet the specific requirements of research, the preparation and sterilization of culture medium are needed.
Attention should be paid to:
When preparing solid media, we first need to boil the prepared liquid medium, and then add the qualified agar, and continue heating until completely melted, then stir constantly to avoid burning the agar paste bottom.
The filtered media should be repackaged.
After repacking, the mouth of a pipe or bottle needs to be plugged with a cotton plug.
After medium sterilization, if you want to make a slant medium and flat medium, the process should be done when the medium is not set.
Sample collection in microbiology: take a representative part of samples from a large number of analysis objects as analysis materials, which is called sampling.
Sample collection in microbiology is an important part of food analysis. The ingredients and contents of the same kind of food products or raw materials may vary greatly due to the different origin, maturity, processing and preservation conditions. The composition and content of different parts of the same analysis object may also be quite different.
It is necessary to evenly collect representative samples from a large number of tested substances with uneven composition and inconsistent composition, so as to prevent the components from escaping and being polluted. Otherwise, even if the later detection links are very precise and accurate, the test results are of no value.
Principle of correct sampling:
① The samples collected shall be uniform and representative, which can reflect the composition, quality and sanitation of all the tested foods.
② During the sampling process, try to keep the original physical and chemical indexes to prevent the components from escaping or bringing in impurities.
③ Steps of sampling
Test sample → original sample → average sample
Test sample: a small amount of materials collected from various parts of a large number of materials in the analysis object.
Original sample: many test samples together are called original samples.
Average sample: the sample from which a part of the original sample is taken for analysis and inspection after technical treatment
Aluminum nickel cobalt permanent magnet(following shorted as AlNiCo magnets) is an alloy consisting of aluminum, nickel, cobalt, iron and other trace metal elements,It divided into sintered AlNiCo magnets and cast AlNiCo magnets. The magnetic properties of the cast aluminium-nickel-cobalt magnets are high and can be processed into different sizes and shapes. The process of sintered aluminium nickel cobalt magnets is simple and can be directly pressed to the required size. The corrosion ability of AlNiCo magnet is stronger, so surface plating treatment is not needed for it.
Cast AlNiCo magnets are used to make teaching magnets.Teaching magnets(also called educational magnets) are used as teaching tools for the teaching experiment demonstration (physics science experiment curriculum, primary school middle school. The teaching magnets/educational magnets can also be used for students stationery, toys etc... It can make students intuitive feelings of the real existence and change of magnetic field, and can vividly express the specific physical characteristics, can arouse the students' interest in learning, so that their attention, stimulate their thinking and imagination.Thus, it will help and promote the understanding and cognition of the magnetic field for primary and secondary school students and children. Magnetic field is beneficial and harmless to humans, the child may also use a magnet N pole; the S pole and the repulsion of the earth's magnetic field, the magnetic attraction principle, make magnets into compass.In order to fully mobilize and develop their creative potential, develop thinking and willing to delve into the good learning attitude of inertia!
The commonly used teaching magnets/educational magnets are bar magnets, U magnet (also known as horseshoe type), and occasionally use with other special-shaped magnets, such as star magnets, ring magnets, heart magnets, triangle magnets and arrow magnets.
Ningbo Beilun Meank Magnetics Co., Ltd is located in the home of Neodymium-Iron-Boron magnets -Ningbo City, we engaged in production of rare earth neodymium magnets over 10 years.
Safety measures to be taken when handling the wire straightening and cutting machine
(1) When handling the wire straightening and cutting machine and installing the bearing frame, the center line of the bearing frame groove should be aligned with the guiding tube, and the center line of the straightening tube and the lower cutting hole.
(2) After installation, check the electrical system and other components for damage, whether the wire straightening cutting machine connection parts are firm and reliable, and whether each transmission part is flexible. After confirming that every part is normal, the test run can be performed. The bearing temperature should be checked during the test run to see if the workpiece such as the hammerhead, cutter and shear gear is in normal condition. Only after confirmed that there is no abnormal condition can the material be fed, the straightening test is run and the wire is cut off.
(3) Select the appropriate straightening block, the traction sheave groove, and the transmission speed according to the diameter of the reinforcing bar required to be straightened. And the diameter of the straightening block should be 2mm~5mm larger than the diameter of the reinforcing bar, and the width of the traction sheave groove should be consistent with the diameter of the reinforcing bar required to be straightened.
(4) Care must be taken to adjust the straightening block. In the straightening tube, there are generally five straightening blocks. The first and fifth straightening blocks must be placed on the centerline, and the middle three can be off centerline. First, shift the steel bar by an offset of about 3 mm. If the reinforcing bar still has a slow bend after the straightening test is run, the offset can be gradually increased until it is straightened.
(5) A steel pipe with a length of about 1 m should be installed at the front of the guide cylinder. The reinforcing bars to be straightened should pass through the steel pipe first, then penetrate into the guiding cylinder and the straightening cylinder to prevent the end of each reinforcing bar from popping out and causing hurt to people when the straightening is nearly completed.
TJK is a leading manufacturer for Reinforcement Steel Processing Machines: Sitrrup bending, Cut & Bend, Mesh Welding, Cage Welding, Lattice Girder and Tunnel Lining, Tunnel segment machines etc.
When the bride chooses the right size of the wedding dress, the size of the wedding dress and the purchase of the wedding dress can be said to be two completely different choices. Renting a wedding dress may only have a few yards of choice, then find a similar size and then modify it on that wedding dress. Because the wedding dress has no idea how many brides wearing, the wedding dress will inevitably leave a lot of traces that have been modified. But the wedding dresses I buy are different, because there are many sizes to choose from, the size subdivision is from 2 yards to 16 yards, and even the plus size is available, so you will definitely choose fit flare wedding dress. So here is mainly to introduce the size choice when choosing to buy a wedding dress.
Generally speaking, most brides may think that the same size of the wedding dress exported to Europe and the United States should be about the same size, but it is not. For example, the size 8 of the United States is equivalent to the size of the European UK 10-12, because the size of the United States is generally larger than that of the United Kingdom, about 1-2 yards.
When the bride chooses the wedding dress of European and American brands, the most important thing to pay attention to is the length of the European and American wedding dresses, because the European and American wedding dresses are mainly for the height of 5 feet 5 inches to 8/9 inches. Asian women generally have a small height, so brides with a height below 5 feet 5 should choose petite size, not regular size. Many brides think that it is okay to cut short skirts. This is a completely incorrect concept, because the chest and waist will fall into an inappropriate position.
In terms of wedding dress styles, the bride with a smaller size should choose some simple straight or small A-line styles, and there will be no more embellishments on the wedding dress. It is best to avoid choosing some fishtail or court-style wedding dresses, because if the bride is not high enough, wearing these wedding dresses will make the bride look more petite and not reveal the beauty that should be.
In addition, when deciding to modify the length of the wedding dress, you must first decide to wear a few high-heels shoes to match the wedding dress. If you do not reserve the height of the high heels shoes, when you officially put on your wedding dress, you will find that the wedding dress will be "hanging feet" as the trousers are not long enough, and it will be very different. It may be the only way to wear a flat-bottomed pair of shoes to match the wedding dress, which will affect the overall beauty of the bride when wearing a wedding dress. Therefore, all brides must pay attention to the details when buying cheap couture wedding dresses, with the best preparation to show the most perfect and moving side at the wedding!
If you want to know more couture,please contact us.
Most people define the wedding dress as a symbol of purity, so most wedding dresses are white, but with the progress of society and the progress of people's aesthetics, everyone gradually began to wear multi coloured bridesmaid dress. There was a time when black wedding dresses were particularly popular, and people began to understand that weddings can wear wedding dresses of other colors.
Since the wedding dress is not restrained in white, wedding dresses of various colors have sprung up, and they have appeared in everyone's sight. In addition to the traditional phoenix coronet and robes of rank in the country, most girls are wearing white wedding dress, now you may wish to try other colors of the wedding dress, the effect is really amazing. Such as colourful embroidered wedding dress and black mermaid dress with sleeves.
The gray wedding dress is the wedding dress that we want to introduce today. Does the gray wedding dress sound unbelievable, will this dull color suit the wedding dress? The answer is yes, and the design is very good.
In fact, the gray wedding dress is not as dark as everyone thinks, but it is even more eye-catching after wearing it. You imagine that when you are married, you are the focus of the audience, and it is your own wedding. It must be the most perfect appearance, so it is very important to choose the wedding dress.It must be to your liking. These gray wedding dresses are very eye-catching, and they feel like the scent of the crowd, and there is a kind of queen's breath, super fairy.
And the gray wedding dress is not picky, whether it is a petite sweet girl, or a full-fledged queen-style girl, wearing a gray wedding dress is very temperament. Generally, girls will not be able to resist it, because it is so beautiful! A good grey wedding dress design is really a work of art. It has the pure beauty of a white wedding dress and the classical beauty of gray. Although the gray is relatively moderate, wearing a gray wedding dress must be the focus of the audience. It really has different aura. There is a feeling of the queen, which also bring fairyism.
Rebar bending machine is one of the necessary equipment for rebar processing. It is mainly used in the bending of rebar in all kinds of construction projects. Portable rebar bending machine is usually used with the cutting machine. Its application is very extensive. With the effect of the national investment, especially the country vigorously develops the high-speed rail, the production and sales of CNC rebar bending machine are increasing rapidly. Similar to other rebar cutting machines, bending hoops and straightening and cutting machines, the production base of this kind of machinery has been formed. Most of the products made in China can meet the needs of users, but the quality of some products cannot meet the requirements of the national standard.
The construction of the machinery industry in China has been developing rapidly in recent years. On the one hand, it is a reason to improve the quality of its own products and the low cost of domestic labor by introducing foreign advanced technology. On the other hand, the implementation of active fiscal policy for many years in the country is the fundamental cause of the growth of the industry.
The structure of rebar bending machine of each manufacturer is basically the same. The transmission scheme of rebar bending machine has the following 2 kinds: "a worm gear with one or two gears and a worm gear drive" and "13 gear transmission". The transmission efficiency of rebar bending machine with worm drive is not as good as the bending machine of the gear transmission. That is to say, the bending machine of the gear transmission is more relaxed with the diameter of the rebar under the same driving motor power condition. But the self-locking characteristic of the worm wheel and worm drive makes the positioning accuracy of the bending in the work much higher. At present, the production and application of rebar bending machine with "one or two grade gear and worm gear drive" are more common and the market share is high.
If you want to buy rebar bending machine,please contact us,we provide rebar bending machine for sale.
If you are a bride, maybe you don't know how to choose a wedding dress that suits you. Maybe you can't tell the difference between a white wedding dress, pale yellow wedding dress and cream wedding dress. Don't worry, here's how to choose a white wedding dress that belongs to you!
Choose the Right White Wedding Garment - Choose the Color Tips: Skin Color
Tips for white wedding dresses:
(1) Rum or champagne wedding dresses
This white with a little pink color will look like a white in the photo.
(2) Silk white, diamond white or natural white
As a white, dark mutant, these colors look as good as white in the photo. As a general rule, most people will be more suitable to wear a soft diamond white wedding dress, it does not look very strange.
(3) White wedding dresses
This is the brightest and simplest white you can find. People with deep skin will wear beautifully.
(4) Ivory wedding dresses
Light yellow and beige also belong to one nature. Some ivory skirts are made of yellow and look very docile and sweet; others will look white and quiet.
If you try on a wedding dress shop, the wedding dress you see is white, but you may see the color difference from the color that you started. In order to prevent the wedding dress from being found and the skin color is not coordinated, please remember to use a sample of fabric, put it on your face, compare it, and see how the color works, and then make the final resolution. In this way, you can choose the white wedding dress that suits you.
Advantages of air source heat pump pros and cons:
Advantages and disadvantages of air source heat pump
Air source heat pumps have few disadvantages. Because air source energy is a dispersive energy source, the heating rate is slow and the thermal efficiency is not very high. In addition, the air source heat pump is prone to frosting problems, and the air source heat pump is limit by distric place geographical .
The condenser scaling efficiency is low :
the low-temperature refrigerant enters the evaporator and exchanges heat with the air. If the air is dusty, the accumulated dust of the evaporator will affect the heat exchange efficiency of the air source heat pump unit after long-term use. The evaporator can be cleaned with soapy water. Rubbing with sandpaper will cause the copper tube of the evaporator to rupture;
when the tap water or groundwater quality is poor, when the high-temperature refrigerant produced by the compressor exchanges heat with the condenser, the condenser coil will foul, the thermal conductivity is reduced, and the heat transfer efficiency is reduced. As the heat builds up in the compressor, high pressure protection occurs.
In the winter, antifreeze work should be done to avoid the expansion of the water in the condenser and the rupture of the condenser heat exchanger coil, which will cause serious consequences for the compressor to enter the water.
Currently, the products have been exported to Western Europe, North Europe, South Africa, Middle-East, South American and Australia market. Sunchi energy group built new 75,000 Watts multi-function Enthalpy Difference Laboratory In the 2012 year, this lab using to strictly control quality.
