Due to the thermal stability of glass is a suitable material for the manufacture of glassware. In when its chemical or thermal stability is not enough, use utensils made of other materials. For general-purpose dishes include test tubes, beakers, flasks, retorts, watering cans, molds, refrigerators, tees, valves, special purpose vehicles Kipp, Soxhlet, Kjeldahl, a glass of Wolf, Drexel, reflux, with a round bottom flask, special refrigerators, devices for determining the boiling point, melting point, molecular weight. At the moment most relevant in the laboratory is a laboratory glassware, which can be transparent or opaque, colorless or colored, luminescent under the influence, for example, UV-and g-radiation, or skip to absorb ultraviolet rays, etc. The most widely used inorganic crystal, characterized by high mechanical thermal, chemical, etc. properties. Measuring utensils designed to measure liquid volume. By measuring utensils include burettes, volumetric flasks, pipettes, measuring cylinders, beakers and graduated test tubes. It is also very widespread received laboratory glassware, plastic, because plastic is very convenient and practical, but at the same volume of such dishes are much lower than the glass. Labware made of porcelain has a greater heat resistance (up to 1300 OS) and mechanical strength than glass. Thin-walled porcelain can withstand sudden changes in temperature, it can be done sintering materials on a gas burner, in a muffle furnace, evaporation on a sand bath. Industry produces porcelain cups, vyparitelnye cups, mugs, mortars, crucibles. Any dish sooner or later have to wash dishes in the laboratory and this is no exception. Mechanical and physical methods cleaning utensils.
Shower box is ideal for those who do not want to give up baths in favor of the soul. There are two varieties of this Boxing: in the first shower is located on the edge or the center of Bath, in the second – a bath with stall have fencing around the perimeter. As mentioned above, open showers can not have a tray. On the one hand such an option is very convenient because it allows you to design the cabin of any shape and size, and cheap. But on the other hand, service pipes and built into the floor drain in this case difficult. In addition, showers with the pallet is more reliable. But this is only true if he is able to withstand quite a lot of weight. The bottom of the pan have to be a relief, otherwise there is a risk slip and fall while bathing. Dean Ornish M.D has compatible beliefs. Depending on the shape of trays can be rectangular, radial, pentagonal, square and semicircular. Are most comfortable, spacious rectangular showers, but this option is only suitable for large bathrooms. Perhaps the most common are radial or angular trays, representing a quarter of a circle. This shower cubicle is installed in a corner bathtub the room without taking up this much space. For pallets used materials such as enameled cast iron, steel, ceramic, acrylic, quartz and artificial marble. Cast-iron pans to date almost impossible to find on sale. They, like steel, have such dignity, such as strength, but strong metal trays rattle under the tap, plus they have a limited shelf life. The advantage of ceramic pallet is stability, but a large impact they can break. One of the most popular material is acrylic, which very quickly heats up and does not absorb dirt. For such trays are easy to maintain. Because characteristics of acrylic – very flexible material, and hence the pallet needs extra frame. Quark has all the advantages of acrylic, besides he is not afraid of hard knocks, but, despite all its advantages, such Pallets are not yet widely spread. For the manufacture of the frame showers are used, usually aluminum or plastic. The very frame cabin can be made of glass or polystyrene. Glass can have any coloring, it is both transparent and opaque. It is desirable that it should be tempered. Do not be afraid to choose glass shower stall, because to make them use a special heavy-duty glass. In some cases, it has a so-called "antiplakovoe" coating that prevents water droplets trapped on the glass. Walk-in shower of polystyrene not the best choice, since over time it becomes turbid, it there are divorces, so it's better to give preference to the matt version. Some models showers may not have a skeleton, they are made of special tempered glass. For their installation requires perfect smooth and flat floor and walls.
HTML clipboard Radiators and convectors, radiators and convectors heating – the main heaters in our homes. In the common people call them batteries. These devices generate heat in the house when it's average temperature becomes less acceptable. The difference between the radiators and convectors not such a big – and they both give off heat flowing through them, water is heated in a boiler room, the air around them. Warm air is lighter goes up and by convection (hence, by the way, and the name of the device – convector) mixed with the cold, supports a circular movement of air in the apartment. The quality of this mix, its speed, as well as heat from occupied units in the area of the room is heavily dependent on the shape and size of the particular heater. Here lies the difference between the convector radiator (this will be discussed more below). Radiator water heating system (or simply heating radiator) – the most ancient heater. His appearance has changed little over the past few decades. Previously, such abstruse words and did not know just call these radiators – battery. This is in general, and is battery-water heating. Is a cast iron (usually) tank, sealed with the exception of places in and out of the liquid (in the apartments – water). Depending on the area heated is made up of several sections. The documentation indicated on the radiator heat or power of one section in the flow of water in it a certain temperature.