The disinfection robot combines two methods of UVC and chemical disinfection to help kill bacteria and reduce the spread of disease. The robot also has the ability to move flexibly, remotely or pre-programmed for a certain sterilization route. Le Anh Son, Deputy Director of Phenikaa Institute of Research and Technology (Phenikaa University), said that the robot is also capable of taking on tasks to support epidemic prevention and control in Bac Giang such as: Transporting necessities , monitoring sick and isolated people through monitoring cameras. Phenikaa University’s disinfection robot. The robot is fully self-propelled, avoiding collisions by using LiDAR technology, integrating artificial intelligence to recognize and remind people to wear masks, measure body temperature and a host of other superior features. . On the evening of June 2, the robot was put into operation for the first time. Before that, in the middle of May 2021 when the epidemic was complicated, students of Phenikaa University launched the campaign “Online learning – Show talent against the epidemic”. The students spent time and effort to create a droplet shield for medical staff, medical staff at hospitals, treatment facilities, and concentrated isolation. Up to this point, 10,000 droplet shields have been sent to more than 30 localities, of which more than half have been transferred to the epidemic center Bac Ninh, Bac Giang. High-tech products “make in Vietnam” such as: COVID-19 epidemiological information maps, disinfection robots, self-propelled robots, smart school solutions … or simply splash shields, orezol water These are all feelings of love and sharing from the collective staff, lecturers, scientists and students of Phenikaa University sent to the epidemic center.

Doctors at the No. 2 field hospital study how to operate the Phenikaa-X disinfection robot. Photo: C.Le Dr. Le Anh Son, Deputy Director of Phenikaa Institute of Research and Technology, said that the disinfection robot can take on the task of supporting epidemic prevention and control in Bac Giang with the main tasks such as: Transporting necessities, monitor patients and quarantined people through monitoring cameras. The robot is fully autonomous and avoids collisions by using LiDAR technology, with built-in artificial intelligence to recognize and remind people to wear masks, measure body temperature and a host of other features. Doctors at the No. 2 field hospital study how to operate the Phenikaa-X disinfection robot. Photo: C.Le Disinfection robot is one of the high-tech products and is directly applied in the prevention and control of Covid-19 epidemic by scientists from Phenikaa Institute of Research and Technology, Phenikaa-X Joint Stock Company, Phenikaa University research and develop to apply in real life. Doctors of field hospital No. 2 said that the presence of the Phenikaa-X disinfection robot helps the hospital a lot because it has an extra protective shield. This robot is run continuously in the corridor to help disinfect the air. Doctors at the No. 2 field hospital study how to operate the Phenikaa-X disinfection robot – Photo: C.Le Previously, students of Phenikaa University also made droplet shields for medical staff, medical staff at hospitals, treatment facilities, and concentrated isolation. Up to this point, 10,000 droplet shields have been sent to more than 30 localities, of which more than half have been transferred to the epidemic center Bac Ninh, Bac Giang. In addition, Phenikaa University also donated 10,000 bottles of Orezol water to the frontline medical staff in the fight against the epidemic.

Illustration. Sunlight is the source of ultraviolet rays (also known as ultraviolet rays – UV rays). This type of radiation is the cause of a lot of damage to the skin. The level of damage from UV rays depends on the intensity of the light, the length of exposure to the light, and whether the skin is protected. Without protection from the sun’s rays, just a few minutes of exposure a day over time will produce noticeable changes to the skin. Freckles, age spots, blood veins, rough skin, wrinkles, loss of collagen, keratinization are all caused by the sun and one thing is for sure, the sun can cause skin cancer. The basic mechanism of action is as follows: When sunlight affects areas of the skin, immediately, skin cells will react by increasing the production of Melanin – the pigment that determines skin color. The more melanin, the darker the skin. There are 3 types of ultraviolet rays: UVA, UVB and UVC. UVC rays have the highest carcinogenic potential, but are absorbed and reflected by the ozone layer, so they do not reach the ground. However, there are currently many places where the ozone layer is punctured or thinned, the risk from UVC is very great. 99% of sunscreens have no UVC protection. In the scope of this article we only talk about UVA and UVB. Sunscreen for oily skin Oily skin that suffers from a thick layer of cream on the face will be extremely sticky and uncomfortable, not to mention if the cream is inherently whiter than the skin, when it is mixed with oil and then unevenly colored, it is a disaster. You should choose sunscreens that contain the words “No Sebum” (non-greasy) or “Oil Free” (oil free) on the package, or sunscreens that are gel, water or spray to avoid causing irritation. skin. If you do not have acne problems or too sensitive skin, then chemical sunscreen with light texture and fast absorption is the right choice. Also, another note: if you want to choose sunscreen when swimming, it’s best to choose those that say “Water Resistant” or “Water Proof” on the package, with an SPF of 50 to 70. and index PA+++. These can last up to about 40 minutes to 1 hour and then you need to reapply for the best sun protection. Sensitive skin Sensitive skin is easily irritated in the sun and many chemical ingredients are in sunscreen, so say no to chemical sunscreens (sunscreen) but choose a more benign physical sunscreen (sunblock). with skin. Choose a product with a thin, light texture or a sunscreen that clearly states sensitive skin. Normal skin This is the most indulgent of all skin types, so you can use almost any sunscreen. However, in the summer, it is still advisable to give preference to light, cool products that do not cause mystery to the skin. Sunscreen for dry skin For dry skin, choose sunscreen products that contain moisturizers, to provide the necessary moisture, improve dryness and create a protective film to protect the skin from dehydration. In addition, sunscreens for dry skin should also incorporate a waterproof feature, ingredients containing antioxidants to enhance skin protection from the bad effects of ultraviolet rays and prevent skin irritation.

Ultraviolet rays are invisible rays, part of the energy coming from the sun, that can burn skin and cause skin cancer. UV radiation is made up of three types of rays – ultraviolet A (UVA), ultraviolet B (UVB) and ultraviolet C (UVC). UVC is the most dangerous type of ultraviolet rays, but it cannot penetrate the ozone layer of the atmosphere, so it is not harmful to the earth. UVA and UVB rays – are the most harmful substances, of which 95% are UVA rays and 5% are UVB rays. UVB rays often affect the outer layer of the skin, damaging the skin. UVB rays cannot pass through glass windows, but are strongly reflected from snow, water surface, asphalt, causing burns … It can lead to some types of skin cancers such as melanoma, carcinoma. basal and squamous tissue. UVA rays are much less intense than UVB rays but reach the deeper layers of the skin about 50 times and cause more damage than UVB rays. UVA rays penetrate thin materials such as windows, clothes, clouds … so even if it’s shady, or cloaked in sun-protective clothing, our skin is still heavily affected. This ray does not cause immediate blackening of the skin like UVB, but causes skin aging and immunodeficiency, it also affects the basal cell layer of the epidermis, where most skin cancers arise. Although the acute effects of UV are usually short and reversible. But the long-term effects of UV rays are much more serious and dangerous, which can be life-threatening, including aging of the skin, suppression of the immune system, eye damage and skin cancer. For this reason, it is often recommended to use a sunscreen to block both of these types of radiation. How to use sunscreen? When the skin has been severely damaged by UV damage and the skin has lost significant collagen, lax cell connection, treatments, including modern aesthetic methods, have partly improved, but It is very difficult to give back healthy skin because at this time the cell’s DNA is damaged. Therefore, it is essential to do immediately to prevent the skin from getting sunburned. First of all, it should be minimized when going to the street when the sun is heavy and need to take measures to protect the skin when going out in the sun with a hat / hat, jacket and sunscreen. Protect skin by wearing a hat and sunscreen 30 minutes before going out in the sun. For the sunscreen to be effective, apply sunscreen to areas of skin that must be exposed to direct sunlight 20 minutes before going out. For the skin already with clothing support, you just need to apply an appropriate amount to the skin. For areas exposed to direct sunlight, sunscreen should be reapplied every two hours. Going outdoors, sunscreen should be reapplied every 2 hours. The shelf life of conventional sunscreens is 3 years under normal room temperature conditions. If placed in an environment that is too hot or too cold, the product quality will suffer, thereby disabling their functionality.

Enough sun protection technology At the UV100 store (Nguyen Dinh Chieu, District 3, Ho Chi Minh City), a pair of gloves costs more than 500,000 VND, many times higher than a pair of normal gloves which only costs about 20,000-30,000 VND. According to the salesman’s recommendation, this glove is both 99% UV resistant and antibacterial; able to dissipate heat, cool quickly due to the breathable fabric … Other products with anti-UV effects also have a sky-high price. Coat over 1 million VND, UV400 glasses over 600,000 VND / piece, mask over 100,000 VND / item … These products are tested for quality and UV protection by an accrediting agency of … Australia. Sunscreen shirt priced at 140,000 VND is introduced by a shop with enough technology with 99% sun protection. At 365 wholesale garment factory Vo Thanh Trang (Tan Binh district, Ho Chi Minh City), we were introduced to many multi-purpose instant sunscreen models including hats, masks, shirts, skirts and the selling price of only 125,000 VND / product. Products. The seller said that the product is made from Japan’s UPF 40 UV Cut anti-UV technology, which protects the skin from 95% of UV rays without applying sunscreen. On the products of the shirt there is no information of the manufacturer other than the words “VNXK” – exported Vietnamese goods. Also at another website specializing in selling mother and baby, many sunscreen products are being sold and introduced themselves according to the latest Japanese AIRISM technology. The selling price is only 140,000 VND / product. Some Japanese fashion brands such as Uniqlo are famous for using UV-resistant fabrics for their sun protection jackets and their product prices in this fashion chain are not less than 1 million VND. However, these products are also being copied and sold at many points and individuals for only 200,000-300,000 VND / product. The common point of selling ambiguous quality is that often the reason fabrics with UV protection cannot distinguish the quality of fabrics with the naked eye. Accompanied by a series of … international certificates. Anti-UV, no need for specialized products According to Assoc.Prof. Dr. Nguyen Manh Tuan – Deputy Director of the Institute of Applied Materials Science, there are many forms of radiation around us, high-energy radiation is electromagnetic, low-energy radiation is infrared. UV rays are classified as high energy radiation, capable of penetrating deep through clothing and causing damage to the skin. There are three types of UV rays: UVC (short wave light), UVB (strong impact on the skin’s surface, causing redness, sunburn and skin cancer risk), UVA (with the longest wavelength, penetrating depth). under the skin, causing skin aging and wrinkling). UPF index is an index evaluating the level of protection of a fabric material from UVA, UVB rays. The higher the UPF index, the lower the amount of UV light penetrating the fabric. An effective sunscreen should be made from fabric with a UPF rating of 15 to 50+, which is about UPF for the best skin protection. Normally, synthetic fibers such as polyester or nylon will be more resistant to UV rays than cotton. Depending on the fabric material that can block UV rays, at different levels. If the fabric is resistant to UVA and UVB rays, the manufacturer must add anti-UV chemicals (this chemical is also known as UV). But whether the chemical is good or not, the ability to resist UV rays, the index of any number must be tested and certified by the Vietnam Textile Institute. “Cheap products on the street, because there are no measuring tools to check, so I do not know for sure what materials they use, whether they are dyed with anti-UV chemicals or not, how much UV protection is. If they use materials that are not good enough, do not dye UV chemicals but increase the product thickness, they can also block UV rays, just the level of resistance can not be maximized as advertised “, Assoc.Prof.Dr. Nguyen Manh Tuan said. Dr. Huynh Khanh Duy – Chemical Engineering Department, Ho Chi Minh City University of Technology said that no matter what material a product is made of, as long as UV rays cannot be penetrated, it is able to protect against the sun. Therefore, whether it is synthetic fiber fabric, cotton fabric, denim fabric, khaki … just thick enough is enough to effectively protect against the sun but the price is quite cheap. But in return, these products can not bring the desired coolness in the hot sun. “With products dyed with anti-UV chemicals, depending on the type of chemical used well or not, the dye will pass through the washing times. Many products on the market today do not announce how much UV protection, so UV resistance is also in the form of … bad luck. If you don’t have money to buy an expensive UV protection product, just take any shirt, put it in the sun, if the sunlight cannot penetrate the fabric hole, the product is highly UV resistant and vice versa. again “, Dr. Huynh Khanh Duy confirmed. According to MSc.Vu Thi Phuong Thao – Deputy Head of General Planning Department, Ho Chi Minh City Dermatology Hospital – some sunscreens can protect against UV rays but with a certain ability and still cannot replace cream Sunscreen. Although using coats, masks, gloves, glasses … consumers still have to coordinate with sunscreen to fully protect the skin when going out in the sun. The SPF number on a sunscreen product demonstrates the ability to protect the skin against UVB rays, the sunscreen used must be a broad spectrum, water-resistant and have an SPF of 30 or higher. If you must be active outdoors and sweat a lot, repeat the cream every 2 hours. (According to Women HCMC)

On the market today, there are many sunscreen products, from domestic to foreign: Japan, Korea, China … with different indicators. It is the diversity of origin, origin, composition (used for dry skin, normal skin, combination skin) … that makes it difficult for consumers to choose suitable sunscreen products.

Moreover, in addition to sunscreen products with clear origins, many small shops, markets, websites … sell low-quality sunscreen products but imitate the prestige “brand”, popular.

Import sunscreen products

In recent days, the weather in the North is more sunny, peaking more than 40 degrees Celsius, consumer demand for sun protection products such as sunscreen, gloves, glasses, masks, especially anti-sun sunshine increased. This is also the time for low-quality sunscreen products to hit the market.

Walking around the market for students in Cau Giay (Hanoi), it is not difficult to see the areas selling cosmetics of unknown origin and labels. Remarkably, most products sold on the market are not preserved under the necessary conditions, away from direct sunlight.

Sunscreen is also sold on a variety of websites with different prices.

According to the survey, the prices of sun protection products in these markets are quite cheap, ranging from 70-100,000 VND / bottle, lower than in stores specializing in selling cosmetics from 50 – 100,000 VND / product. At first glance, the cosmetic products on the market have the same design, design, and design as genuine products, helping consumers’ eyes. Even for those with low incomes, this will be a popular product, suitable for money.

Sunscreen – the indomitable object on a hot summer day

As one of the indispensable products on a summer day, sunscreen helps people protect the skin, avoiding the effects of ultraviolet (UV) rays in the sun. Ultraviolet rays are divided into 3 types, UVA, UVB, and UVC rays. In which, UVA, UVB rays can pass through ozone layer and harm human health; UVC rays are blocked by the ozone layer, unable to penetrate the ground. Therefore, when going outdoors, our skin will be affected by UVA and UVB rays, which darken the skin, damage the skin, accelerate the aging process and increase the risk of skin cancer.

Sunscreen helps people protect the skin from the effects of ultraviolet (UV) rays in the sun.

To protect the skin from the effects of UV rays, consumers who choose sun protection products, including sunscreens, should pay attention to choosing a cream with a higher SPF number, which protects the skin from UV rays. higher. For example, SPF 2, skin protection ability is 50%; SPF 15, skin protection ability is 94%; SPF number is 100, the ability to protect the skin is 99%. However, consumers should not choose products with the SPF number too high, as it can cause skin irritation. Therefore, consumers only need to choose at 30, 50 for the best.

Besides, when buying a sunscreen, consumers also pay attention to the PA index (denoted PA ++, +++…) on the sunscreen. The more + sign, the better the resistance to UV rays.

However, consumers also note, it is possible that the sunscreen is suitable for one person, but irritates the skin for another. So, consider before choosing this skin protection product.

Experts warn against the harmful effects of sunscreen if used in the wrong way

Recently, the US Food and Drug Administration (FDA) recommends a sunscreen with a maximum SPF of 50-60 for the best skin protection. Two safe and effective ingredients in sunscreen are zinc oxide, titanium dioxide. Meanwhile, the ingredients aminobenzoic acid (PABA) and trolamine salicylate have been warned by the FDA to be unsafe.

FDA also requires manufacturers to demonstrate the safety of 12 sunscreen ingredients: cinoxate, dioxybenzone, oblulizole, homosalate, meradimate, octinoxate, octisalate, octocrylene, padimate O, sulisobenzone, oxybenzone, avobenzone. Therefore, consumers need to pay close attention to the ingredients on the product label when choosing sunscreen. Safe sunscreens approved by the FDA include sprays, oils, lotions, creams, gels, avocados, glues, ointments, and waxes. The agency says more information is needed before drawing a conclusion with its powdery sunscreen.

The US Food and Drug Administration (FDA) recommends a sunscreen with a maximum SPF of 50-60 for the best skin protection.

To prevent skin cancer, Associate Professor, Dr. William W. Huang, Wake Forest School of Medicine, recommends applying sunscreen about 30 minutes before going out in the sun and reapplying at least every two hours. Facial skin is a sensitive, vulnerable place to ultraviolet rays leading to skin cancer, so priority is given to applying cream on the face.

Ohio-based dermatologist Amy Kassouf also noted that sunscreen should be applied to small areas of skin like the eyelids, lips, and ears. Most lip cosmetics do not contain SPF. The skin on the edges of clothing is also often sunburned, so more sunscreen should be applied, according to dermatologist Jennifer Stein in New York. People with sensitive skin should use sunscreens containing zinc oxide and titanium dioxide in place of the chemical sunscreen ingredient.

According to chemist and founder of the beauty website The Beauty Brain – Perry Romanowski, expired sunscreens will no longer be able to protect your delicate skin. At this time, sunscreen, whether physical or chemical, has no longer reached the SPF level as advertised. Meanwhile, chemical sunscreens with ingredients containing oxybenzone, avobenzone and homosalate can oxidize and become less effective. Physical sunscreens contain zinc oxide or titanium dioxide, although there is no oxidation, they still lose the quality and effectiveness of sun protection. Simply put: while the sunscreen ingredients are active, they may not be able to function properly in skin protection.

Also sharing about the harmful effects of sunscreen, Dr. Erin Gilbert said that when you open the bottle of sunscreen with dirty hands, or open too many times can cause bacteria to enter the product. Decreases the quality of the cream and causes acne breakouts when used.

Dr. Gilbert recommends that if you leave sunscreen in a hot place such as in a car, swimming pool or in a bag, it will expire more quickly due to high temperature environments. In this case, you should replace it every few months to ensure that the sunscreen will always work effectively.