Things that, it turns out, have a shelf life. And it's worth considering!
We all know that products and things have a strictly defined shelf life , and its violation can seriously harm your health or the health of your loved ones. But there are other things that we use every day, but do not even think about the fact that they also have a limited shelf life. We always remember that we need to check the expiry date of milk, monitor the safety of cosmetics, but we ignore the huge number of objects that surround us sometimes longer than it would cost. We propose to conduct an audit where it is needed no less than in the refrigerator.
Sneakers for running
When deciding on the need to purchase new sports shoes - we often focus on the fact that the old pair of shoes is worn out or looks bad. But few people think about the fact that even if the sneakers look well-preserved - then still they could already lose their "sporting" form. And especially this is important for running shoes.
As the research shows - on average, after 500 kilometers of running, the sneakers lose their damping properties, which means that there is an excessive load on the joints.
Dmitry Krasnoyarov, product manager of the direction "Footwear": Of course, there is a direct impact of wear on the damping properties of any footwear, and even more sports. With continuous operation, any technology loses its original properties. Professional athletes usually have more than ten pairs in their stock. The influence of weather conditions, surface types, and many other factors determine the choice of the athlete in favor of the corresponding model.
It is impossible to completely eliminate the burden on the joints, but with the help of advanced technologies it can be significantly reduced. For example, already now there are innovative materials that have durability and durability. Such shoes, if it is used by a layman, can be changed no more than once every three years.
At first glance, it seems that with potatoes everything is simple and clear: if not spoiled - then you can eat. But in fact, everything is much more complicated and serious. Potatoes may contain a substance harmful to humans: a toxic solanine chemical. The usual potato contains its minimum amount and does not harm anybody.
But quite another matter, the potato, which was stored for a long time, began to grow green or germinate. In "elderly" potatoes, the level of solanine grows so much that it already becomes dangerous for human health.
Damir Yarlushkin, expert: Solanin is an alkaloid of vegetable origin, which is formed in potatoes and other plants of the Solanaceae family (eggplant, tomato, vegetable pepper, tobacco) together with chlorophyll when light enters the plant. Thus, plants are protected from insects and animals. But the solanine is dangerous, it can be for people.
If the potatoes "turned green" for less than a quarter, then the body will not eat much harm from it, but it is necessary to peel such a potato by cutting a thicker layer of peel, since the main concentration of solanine is in it. To solanine in the potato is not formed, it must be stored in places without access to light.
Network filters and voltage regulators
One of the most unexpected things on our list is network filters and stabilizers. They are designed to work under a certain load and can only pass through a limited number of Joules, and then start to fail.
This is especially dangerous because the operation of the network filters that have served their life may end in a fire.
Ilya Sukhanov, expert, head of the testing laboratory: Any network filter or just an extension cord is designed to transfer a certain current, which is indicated in Amps. This parameter depends on the cross-section of the wires, as well as the cross-section and material of the current-carrying plates. With a significant (more than 10-20%) and long-term (more than 5-10 minutes) exceeding the declared value, the product may melt or ignite, creating a fire hazard situation.
In high-quality network filters, everything will be limited by the operation of the overload protection. But inexpensive Chinese filters and extension cords rarely withstand even declared values, so they should be exploited with an "underload" of 20-30%, or better simply do not buy.
We all used to store jars of spices for years and change them only when this or that seasoning ended. And very vain!
Spices have a shelf life, which most often does not exceed two years. And for ground spices it is even shorter. Studies have shown that after 6 months the ground spices lose their flavor and flavor.
Advice: give preference to spices that are stored entirely. You can always grind them yourself. Especially it concerns pepper, cinnamon and coriander.
Hydrogen peroxide is an indispensable component of any, even the most basic first aid kit. And, of course, we do not open a new vial of peroxide every time, but use the vial started. And here it is in vain! After opening, the bottle with peroxide retains its medical properties for no longer than two months, and then turns into ordinary water.
This does not apply to a sealed container: such hydrogen peroxide will quietly "live" a year if stored in a dark place and do not heat.
Damir Yarlushkin, an expert: In everyday life, the bactericidal properties of 3% hydrogen peroxide, which is sold in pharmacies, are mainly used. This fluid, having the formula H2O2, is essentially water, to which during the electrolysis of sulfuric acid (and some other methods) add an additional oxygen atom. In this atom of oxygen lies the power of hydrogen peroxide. It is called "active" or "atomic" oxygen: it is the component that, when hydrogen peroxide is used, detaches from the molecule and does its job, killing the bacteria.
However, the hydrogen peroxide molecule H2O2 is very unstable, so it should be stored in a dark place and in a hermetically sealed container. The energy of a quantum of daylight is enough to "break up" the molecule of peroxide into water and oxygen. And in the open air, decomposition occurs even faster than in the light: when exposed to air, atomic oxygen simply "evaporates", connecting with the oxygen of the air, and the bubble remains with ordinary water.
The difference between the expiration date and the shelf life: we learn to distinguish one from another
- Shelf life: The period during which the food product, subject to the specified storage conditions, preserves the properties specified in the normative or technical document. Expiration of the shelf life does not mean that the product is not suitable for its intended use.
- Shelf life: The period after which the food product is considered unfit for its intended use.
- Term of implementation: The period during which the food product may be offered to the consumer.
Documents and laws containing clear and understandable information on this topical issue:
DSTU 4518-2008 "Food products. Marking for consumers. General rules".
№ 487 Order of 28.10.2010 "On approval of the Technical Regulations on the rules for food labeling."
GOST R 51074-2003 "Food products. Information for the consumer. General requirements "(RF).
Shelf life: Pillows, Slippers
Shelf Life: Sponge, Washcloth, Towel, Toothbrush, Hydrogen Peroxide
Shelf life: Comb, Perfume, Eau de Toilette
Shelf life: Soother, Baby Car Seat
Shelf life: Bra, Running Shoes
Shelf-life: Spices, Flour
Shelf life: Fire extinguisher, Mains filter, Disinfection, Insect repellent
Via linkis.com and adme.ru