Food additives are substances added to food to preserve flavor or enhance its taste, appearance, or other qualities. Some additives have been used for centuries; for example, preserving food by pickling (with vinegar), salting, as with bacon, preserving sweets or using sulfur dioxide as with wines. With the advent of processed foods in the second half of the twentieth century, many more additives have been introduced, of both natural and artificial origin.
Food additives can be divided into several groups, although there is some overlap because some additives exert more than one effect. For example, salt is both a preservative as well as a flavor.
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· Stay indoors and close the doors and windows. When you can't hide in a building with lightning protection facilities in the field, remove metal objects such as watches and glasses, and never get closer to the power source, trees and poles. Avoid rain; reduce body height as much as possible to reduce the risk of direct lightning strikes; feet should be as close as possible, and contact with the ground should be as small as possible to reduce the “step voltageâ€; the best protection places in the wild are caves, ditches, A canyon or a clearing below a tall tree.
· It is not appropriate to use TVs, stereos and other electrical appliances without lightning protection measures or insufficient lightning protection measures. Do not go near open doors and windows or metal pipes. Unplug electrical appliances and turn off electrical appliances and natural gas switches. Do not use hair dryers, electric shavers, etc. Do not use taps.
• Do not touch live equipment such as antennas, pipes, wire mesh, metal doors and windows, building facades, etc., or other similar metal devices. Do not receive clothing on clothesline or iron wire. Do not install fences, telephones or power lines, pipes, or construction steel. Do not handle flammable items contained in open containers.
• Do not use or reduce the use of telephones and mobile phones. Do not stay near iron fences, metal clotheslines, overhead metal bodies, and railroad tracks. Do not stand on top of a mountain, on a roof, or near a highly conductive object. It is not advisable to enter or approach low-rise buildings such as buildings, garages, carports, temporary sheds, and guard booths without mine protection facilities.
• Do not swim or engage in other water sports or activities. Do not stay in swimming pools, lakes, seashores, paddy fields, and boats. It is not advisable to carry out outdoor ball games. It is not advisable to use an umbrella in an open space. It is not advisable to put a hammer, a spade, a badminton racket, a fishing rod, and a golf club on their shoulders.
• When you feel that your body has a charge, such as when your hair is upright, or when your skin feels tremulous, be aware that you may receive an electric shock. You should immediately fall to the ground and wait for lightning to call someone for help.
· It is not advisable to ride a horse, ride a bicycle, drive a motorcycle, or drive a tractor. The vehicle is often an excellent lightning protection device. Because of the shielding effect, it will be struck by lightning in time and it will not hurt anyone. How should the unit carry out lightning disaster prevention?
· The unit shall regularly test the lightning protection facilities by a qualified professional lightning protection inspection agency to assess whether the lightning protection facilities meet the requirements of the national regulations.
· The unit shall establish a person responsible for preventing lightning disasters to be responsible for lightning protection safety work, establish various safety standards for lightning protection, and establish regular inspection systems for various lightning protection facilities. After the thunderstorm, conduct safety inspections and do a good job of daily maintenance of the facility. After a thunderstorm, it is necessary to check whether the overvoltage protection devices installed on the power supply and signal lines of the telephone program-controlled switches, computers, and other electrical equipment are damaged, and should be promptly replaced when found damaged.
·When constructing and constructing a lightning protection facility, the construction unit shall consider comprehensively the factors of geology, soil, meteorology, environment, the characteristics of the protected object, and the law of thunder and lightning activity, and adopt a safe, reliable, technologically advanced, and economically reasonable design and construction method. .
• Lightning protection equipment, devices, and equipment that meet the national standards for technology and quality should be used to avoid the use of non-standard lightning protection products and devices.
· The newly added construction and newly added installation equipment should simultaneously redesign and construct the lightning protection system. For example, the re-laying of computer network cables and the shifting and addition of outdoor antennas should all be redesigned and constructed.
· In the event of a thunderstorm, the situation should be reported to the relevant authorities in a timely manner so that they can be dealt with in a timely manner to avoid further lightning strikes.
Lightning Tips: Points to Note When Lightning Occurs
The following points should be noted when lightning occurs: