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UV light can kill viruses, but home devices risk false security, say experts – CBC.ca

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Researchers say hand-held ultraviolet light devices being sold online with claims they can disinfect groceries and clothing can be unreliable and dangerous if mishandled.

The UV light sanitizers are being advertised as the panacea for the COVID-19 pandemic, able to disinfect everything from dinner vegetables to doorknobs.

Many different models are being sold online, ranging in price from $25 to $200. An online search for those listed as top products on business and tech sites list 17 as sold out or “in high demand.”

They look like a small flashlight or flat curling iron and often claim to kill 99 per cent of germs. In Canada such claims require scientific proof.

“If a company cannot provide scientific evidence [then] do not buy their product,” said Taylor Mann, founder and CEO of CleanSlate UV in Toronto.

Mann said his UV supply business has exploded in popularity in the pandemic. He’s moving manufacturing from China to Ontario, and pushing for tougher UV industry standards.

Hand-held UV flashlights are sold commonly online. Some purport to disinfect ’99 per cent of germs,’ but UV light experts have their doubts. (CBC )

“There’s a lot of devices out there that are very concerning,” said Mann.

Canadian scientists researching the effectiveness of UV light as a disinfectant say the at-home technology is a poor defence against the coronavirus that causes COVID-19.

Ottawa researcher Richard Webster said the key to destroying pathogens is the intensity of the light, and he doubts consumer-grade devices are, in many cases, strong enough to disinfect within seconds, as some claim to do.

“We think the amount of UV you need is about 20,000 joules per metre squared and you probably aren’t going to get that in your hand-held little device,” Webster said.

His prototype device uses between 240 to 480 watts to achieve that dose of light.

Dubious claims

Webster is with a research team at Ottawa’s CHEO Research Institute that reviewed 1,000 studies of UV light decontamination and is working on a way to disinfect medical masks so they can be reused.

He said industry and hospitals are collaborating on prototypes of UV light sanitizing devices across Canada. But he says those devices are not available, or recommended, for home use.

They are big and combine multiple strips of LED lights — more than could be housed in a handheld wand — that deliver a powerful blast of UV light.

Ayman Yaghi, left, stands with colleagues from Arkalumen, holding the prototype UV mask disinfection device they just invented to harness UV light to recycle medical respirators. (Arkalumen)

The wavelength of the light emitted is potentially dangerous, so such sanitizers are usually housed in a box or cabinet and aren’t turned on until they are fully enclosed. Although smaller versions often use the same LED lights as the hospital-grade versions, it’s difficult to test their power, Webster says.

Claims that disinfection happens in seconds are questionable, Webster said, because it takes time to kill certain pathogens.

“I wouldn’t use those as my first line of defence,” said Webster.

It also takes shortwave UV-C light — with a wavelength of around 250 nanometres — to disinfect. Many of the consumer-grade models advertise that they do use that wavelength, but that in itself is a potential danger: UV light of that intensity can burn skin, damage eyes and cause skin cell mutations.

Ayman Yaghi, general manager of Arkalumen, the Ottawa company that built the prototype device designed to disinfect medical masks, says a hand-held consumer sanitizer using UV light is possible — but he would be reluctant to put one into service.

A mild bleach solution and simple soap and water are recommended to protect against COVID-19. (CBC News)

“The main concern is that the average consumer doesn’t have the knowledge or skills to use the device effectively or safely,” said Yaghi, who added that different viruses require different lengths of exposure to be neutralized.

He said he’s wary of the specifications, claims and testimonials for the sanitizers sold online, some of which include images of the product being used to disinfect groceries and even masks.

Yaghi said he worries the devices will give a false sense of security to users.

“It’s amazing that people in the comments on these products say that it works so well, but they don’t really have a way to verify that it works on their groceries,” said Yaghi.

Webster said grocery disinfection is best done with soap and water — or by just washing your own hands after touching packaging.

If a consumer does opt to wave an unproven UV light product over a cereal box for safety, Mann said the best-case scenario is it won’t do anything.. 

“Worst-case scenario, you could be buying a product that is actively harming you. Realistically you should not be exposed to UV-C light that is powerful enough to make any kind of difference.”

Grocery shopping and unpacking is another potential infection point for the novel coronavirus, so some people look for ways to disinfect their fruits, vegetable and packaging. (Shutterstock / Atstock Productions)

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Roots sees room for expansion in activewear, reports $5.2M Q2 loss and sales drop

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TORONTO – Roots Corp. may have built its brand on all things comfy and cosy, but its CEO says activewear is now “really becoming a core part” of the brand.

The category, which at Roots spans leggings, tracksuits, sports bras and bike shorts, has seen such sustained double-digit growth that Meghan Roach plans to make it a key part of the business’ future.

“It’s an area … you will see us continue to expand upon,” she told analysts on a Friday call.

The Toronto-based retailer’s push into activewear has taken shape over many years and included several turns as the official designer and supplier of Team Canada’s Olympic uniform.

But consumers have had plenty of choice when it comes to workout gear and other apparel suited to their sporting needs. On top of the slew of athletic brands like Nike and Adidas, shoppers have also gravitated toward Lululemon Athletica Inc., Alo and Vuori, ramping up competition in the activewear category.

Roach feels Roots’ toehold in the category stems from the fit, feel and following its merchandise has cultivated.

“Our product really resonates with (shoppers) because you can wear it through multiple different use cases and occasions,” she said.

“We’ve been seeing customers come back again and again for some of these core products in our activewear collection.”

Her remarks came the same day as Roots revealed it lost $5.2 million in its latest quarter compared with a loss of $5.3 million in the same quarter last year.

The company said the second-quarter loss amounted to 13 cents per diluted share for the quarter ended Aug. 3, the same as a year earlier.

In presenting the results, Roach reminded analysts that the first half of the year is usually “seasonally small,” representing just 30 per cent of the company’s annual sales.

Sales for the second quarter totalled $47.7 million, down from $49.4 million in the same quarter last year.

The move lower came as direct-to-consumer sales amounted to $36.4 million, down from $37.1 million a year earlier, as comparable sales edged down 0.2 per cent.

The numbers reflect the fact that Roots continued to grapple with inventory challenges in the company’s Cooper fleece line that first cropped up in its previous quarter.

Roots recently began to use artificial intelligence to assist with daily inventory replenishments and said more tools helping with allocation will go live in the next quarter.

Beyond that time period, the company intends to keep exploring AI and renovate more of its stores.

It will also re-evaluate its design ranks.

Roots announced Friday that chief product officer Karuna Scheinfeld has stepped down.

Rather than fill the role, the company plans to hire senior level design talent with international experience in the outdoor and activewear sectors who will take on tasks previously done by the chief product officer.

This report by The Canadian Press was first published Sept. 13, 2024.

Companies in this story: (TSX:ROOT)

The Canadian Press. All rights reserved.

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Talks on today over HandyDART strike affecting vulnerable people in Metro Vancouver

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VANCOUVER – Mediated talks between the union representing HandyDART workers in Metro Vancouver and its employer, Transdev, are set to resume today as a strike that has stopped most services drags into a second week.

No timeline has been set for the length of the negotiations, but Joe McCann, president of the Amalgamated Transit Union Local 1724, says they are willing to stay there as long as it takes, even if talks drag on all night.

About 600 employees of the door-to-door transit service for people unable to navigate the conventional transit system have been on strike since last Tuesday, pausing service for all but essential medical trips.

Hundreds of drivers rallied outside TransLink’s head office earlier this week, calling for the transportation provider to intervene in the dispute with Transdev, which was contracted to oversee HandyDART service.

Transdev said earlier this week that it will provide a reply to the union’s latest proposal on Thursday.

A statement from the company said it “strongly believes” that their employees deserve fair wages, and that a fair contract “must balance the needs of their employees, clients and taxpayers.”

This report by The Canadian Press was first published Sept. 12, 2024.

The Canadian Press. All rights reserved.

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Transat AT reports $39.9M Q3 loss compared with $57.3M profit a year earlier

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MONTREAL – Travel company Transat AT Inc. reported a loss in its latest quarter compared with a profit a year earlier as its revenue edged lower.

The parent company of Air Transat says it lost $39.9 million or $1.03 per diluted share in its quarter ended July 31.

The result compared with a profit of $57.3 million or $1.49 per diluted share a year earlier.

Revenue in what was the company’s third quarter totalled $736.2 million, down from $746.3 million in the same quarter last year.

On an adjusted basis, Transat says it lost $1.10 per share in its latest quarter compared with an adjusted profit of $1.10 per share a year earlier.

Transat chief executive Annick Guérard says demand for leisure travel remains healthy, as evidenced by higher traffic, but consumers are increasingly price conscious given the current economic uncertainty.

This report by The Canadian Press was first published Sept. 12, 2024.

Companies in this story: (TSX:TRZ)

The Canadian Press. All rights reserved.

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