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Tia UV Có Tác Hại Thế Nào Đến Da Chúng Ta

06/07/2017
bởi Vũ Đan Doe

Da chính là bộ phận rộng lớn nhất, bao phủ và bảo vệ toàn bộ cơ thể. Chính vì chức năng này nên da của chúng ta phải đối diện với nhiều tác hại của môi trường xung quanh như: nắng, gió, bụi bẩn, chất độc hại… Làn da là nơi phản ánh sớm và rõ rệt nhất sức khỏe của bạn, cũng là yếu tố làm nên diện mạo xinh đẹp, tự tin của các bạn gái. Do đó, da rất cần được quan tâm, chăm sóc. Và một trong những điều bạn cần làm để bảo vệ da nhất đó là CHỐNG NẮNG.

Trong ánh nắng có nhiều tia UV gây tác hại trực tiếp lên làn da chúng ta, khiến xuất hiện các dấu hiệu lão hóa như: vết nhăn, mất tính đàn hồi, nám, tàn nhang, mụn…và nguy hiểm hơn là dẫn đến khả năng ung thư da.                   

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Các tia tử ngoại bao gồm 3 loại: UVC, UVB và UVA.

Tia UVC là loại tia cực tím có khả năng gây ung thư cao nhất, may thay loại tia này được tầng ozon hấp thụ và phản xạ nên không đến được mặt đất.  Tuy nhiên với hiện tượng thủng tầng ozon, hiệu ứng nhà kính như hiện nay thì UVC là điều đáng lo ngại.

Tia UVB có nhiều vào khoảng 10h-14h trong ngày là thủ phạm trực tiếp gây nên tình trạng nám da vì chúng trực tiếp tác hại tới lớp biểu bì trên da rồi từ đó gây nên tình trạng bỏng nắng, mất nước, tăng sắc tố trên da và làm sạm đen bề mặt da. Tuy nhiên tia UVB lại có lợi ích tuyệt vời đó là giúp tổng hợp vitamin D, nhưng chỉ đối với ánh nắng trước 7 giờ sáng thôi nhé.

Tia UVA có nhiều vào khoảng 10h-15h trong ngày, là nguyên nhân hàng đầu gây lão hóa da sớm, chúng phá vỡ sự liên kết của sợi collagen khiến da yếu ớt, mất đàn hồi và mất đi khả năng chống lại yếu tố gây hại từ môi trường. Tia UVA có thể xuyên qua mây, sương mù, cửa kính, vải… tác động sâu vào trung bì và hạ bì, và có thể gây các bệnh về mắt như gây viêm giác mạc và đục thủy tinh thể….Nguy hiểm hơn là có thể gây ung thư da. Vì vậy bạn không nên chủ quan khi cho rằng chỉ cần đeo khẩu trang, mặc quần áo dài tay hoặc không ra nắng là thoát khỏi tác hại của UVA nhé.

Dù nhiều chuyên gia và các bác sĩ da liễu đã đưa ra khuyến cáo việc sử dụng kem chống nắng kể cả khi trời âm u, trong nhà, trong văn phòng nhưng dường như việc chống nắng chưa được quan tâm rộng rãi. Phần lớn mọi người cho rằng chống nắng là giúp da không bị bỏng rát, không bị đen khi ra nắng, nhưng thực chất sử dụng kem chống nắng chính là hỗ trợ da khỏi các tác hại nặng nề của tia tử ngoại.

Phụ nữ Nhật Bản sẵn sàng chi đến 1/2 khoản tiền mua mỹ phẩm vào các sản phẩm kem chống nắng. Họ sử dụng HẰNG NGÀY, bốn mùa, quanh năm, bất kể thời tiết, bất kể ở đâu. Đây cũng chính là lý do khiến phụ nữ Nhật được đánh giá là sở hữu làn da đẹp xếp hàng Top trên thế giới.

Có thể nói sử dụng Kem Chống Nắng chính là bí quyết làm đẹp và bảo vệ cơ thể đơn giản nhất của phụ nữ hiện đại.
Các bác sĩ da liễu khuyến cáo nên sử dụng kem chống nắng với chỉ số SPF ít nhất là 15, cao hơn đối với những người có làn da sáng và người đặc biệt nhạy cảm với ánh nắng mặt trời nên sử dụng Sunblock (kem chống nắng vật lý).

C:\Users\Administrator.8J2U5VRV13XKQ7H\Desktop\cach-chon-va-su-dung-kem-chong-nang-tot-nhat.jpg

Bình luận

Thank you for taking time to read this message.Best regards,

Below you will find a short overview of a study based on an analysis of 600,000 search queries, which then calculated the value of various local ranking parameters for each top-100 page.


Facts about Google’s Local Ranking


Is there at least one keyword in your list of keywords, like “keyword + City (or state)”, that you’d like to rank for?


If so, then you’ll find the information below extremely useful! These findings are based on a large-scale research effort on Google’s local ranking algorithm, and highlights the importance of various local SEO ranking factors.


But before I go into further detail, let me take a moment to remind you that we are running a 20% Discount Special Offer for all 20-70 DA backlinks.


So, let’s briefly answer the question:


What is the priority of local SEO investment?

Main Factors Impacting Local Ranking

1. Links. While everyone understands that backlinks play a crucial part in local ranking, the lesser-known secret discovered by the study is that they have the strongest correlation to positive ranking. What really matters is how old your links are, target keywords usage and word count of on-page content. All of which helped towards creating positive local rankings.


2. Website factors. Not surprising, but use of the target keywords and the number of words on a page appeared to make a difference. Location pages with a lot of content tend to do better than those with smaller amounts.


3. Citations. While citations are important to establishing authority of a site, interestingly, the study found that citation did little to disrupt a site from its local ranking, especially if the site is already in Google’s Local Pack. This does not mean citation problems shouldn’t be fixed. It just confirms that while foundational in nature, citations do little to improve local rankings.


4. Factors related to Google My Business. The study’s results showed that, while inclusive in and of themselves, having a more complete Google My Business page did result in better local rankings. Given how these factors work, it’s difficult to determine the precise contribution of GMB factors to positive page rankings. However, factors such as verified business ownership, photos and good reviews in your GMB profile all helped with enhancing local rankings.


So, what does this mean
for your Local SEO Ranking strategy?
Well, for starters, you do need to tackle your citation issues ASAP.


And, if you are competing in a particularly competitive niche, you need to start acquiring backlinks – high-quality ones! – at the earliest. But more significantly, the results of the study lead us to conclude that Google’s organic Local SEO Ranking algorithm holds a lot more sway on Local Pack ratings than it did prior to its Pigeon upgrades.

Let a team of Pros give your site a Local Boost

With years of experience on our side, and in-depth knowledge of how Google’s Local SEO Ranking algorithm works, our team of professionals have already helped many of our clients:

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Thank you for taking time to read this message.Best regards,

Below you will find a short overview of a study based on an analysis of 600,000 search queries, which then calculated the value of various local ranking parameters for each top-100 page.


Facts about Google’s Local Ranking


Is there at least one keyword in your list of keywords, like “keyword + City (or state)”, that you’d like to rank for?


If so, then you’ll find the information below extremely useful! These findings are based on a large-scale research effort on Google’s local ranking algorithm, and highlights the importance of various local SEO ranking factors.


But before I go into further detail, let me take a moment to remind you that we are running a 20% Discount Special Offer for all 20-70 DA backlinks.


So, let’s briefly answer the question:


What is the priority of local SEO investment?

Main Factors Impacting Local Ranking

1. Links. While everyone understands that backlinks play a crucial part in local ranking, the lesser-known secret discovered by the study is that they have the strongest correlation to positive ranking. What really matters is how old your links are, target keywords usage and word count of on-page content. All of which helped towards creating positive local rankings.


2. Website factors. Not surprising, but use of the target keywords and the number of words on a page appeared to make a difference. Location pages with a lot of content tend to do better than those with smaller amounts.


3. Citations. While citations are important to establishing authority of a site, interestingly, the study found that citation did little to disrupt a site from its local ranking, especially if the site is already in Google’s Local Pack. This does not mean citation problems shouldn’t be fixed. It just confirms that while foundational in nature, citations do little to improve local rankings.


4. Factors related to Google My Business. The study’s results showed that, while inclusive in and of themselves, having a more complete Google My Business page did result in better local rankings. Given how these factors work, it’s difficult to determine the precise contribution of GMB factors to positive page rankings. However, factors such as verified business ownership, photos and good reviews in your GMB profile all helped with enhancing local rankings.


So, what does this mean
for your Local SEO Ranking strategy?
Well, for starters, you do need to tackle your citation issues ASAP.


And, if you are competing in a particularly competitive niche, you need to start acquiring backlinks – high-quality ones! – at the earliest. But more significantly, the results of the study lead us to conclude that Google’s organic Local SEO Ranking algorithm holds a lot more sway on Local Pack ratings than it did prior to its Pigeon upgrades.

Let a team of Pros give your site a Local Boost

With years of experience on our side, and in-depth knowledge of how Google’s Local SEO Ranking algorithm works, our team of professionals have already helped many of our clients:

- get high quality backlinks (you can get the same now with 20% discount)!

- enrich their site with top-notch content

- get a long list of the citations as a BONUS for any of our backlinks package!


And that’s exactly what we’re offering you today! But you need to act NOW to take advantage of our special 20% discount offer, because the window is closing fast.


Chris Patterson
CEO, Assured SEO & Digital Consultancy
chris.patterson@seoespecialista.com
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