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Smartphone app could alert you to cancer-causing chemicals in meat

A new smartphone app could alert users to cancer-causing chemicals in processed meats like sausages, ham, bacon and salami.

Scientists in Spain have created a system that includes a colour-changing film called ‘POLYSEN’ that consumers can stick onto meat products.

The labels get darker when they detect high levels of nitrite – a meat preservative that can form potentially cancer-causing compounds.

Users can then snap a picture of the film with a smartphone, and a specially-developed app will analyze the color and give a nitrite concentration value.

Cured and processed meats, such as salami and bacon, are often treated with nitrite or nitrate salts to keep them looking and tasting fresh (file photo)

Cured and processed meats, such as salami and bacon, are often treated with nitrite or nitrate salts to keep them looking and tasting fresh (file photo)

Graphic from the researchers' paper shows the system works.  Discs punched from the film are placed on meat samples for 15 minutes to allow them to react with nitrite.  The discs are then removed and dipped in a sodium hydroxide solution for one minute to develop the colour.  The higher the nitrite present, the deeper the film's yellowish hue.  A smartphone app self-calibrates when a chart of reference discs is photographed in the same image

Graphic from the researchers’ paper shows the system works. Discs punched from the film are placed on meat samples for 15 minutes to allow them to react with nitrite. The discs are then removed and dipped in a sodium hydroxide solution for one minute to develop the colour. The higher the nitrite present, the deeper the film’s yellowish hue. A smartphone app self-calibrates when a chart of reference discs is photographed in the same image

HOW DOES ‘POLYSEN’ WORK?

POLYSEN, or ‘polymeric sensor’, is a film made of four monomers and hydrochloric acid.

Discs punched from the film are placed on meat samples for 15 minutes to allow them to react with nitrite.

The discs are then removed and dipped in a sodium hydroxide solution for one minute to develop the colour.

The higher the nitrite present, the deeper the film’s yellowish hue.

A smartphone app self-calibrates when a chart of reference disks is photographed in the same image.

The system has been created by experts at Universidad de Burgos in Spain and detailed in a new study, published in ACS Applied Materials & Interfaces.

‘There is a need to detect and control different chemical compounds added to processed food, such as processed meat,’ they say.

‘Our method represents a great advance in terms of analysis time, simplicity, and orientation to use by average citizens.’

Cured and processed meats, such as bacon, hot dogs, ham and sausages (including Mortadella, an Italian luncheon meat), are often treated with nitrite or nitrate to keep them looking and tasting fresh.

Nitrites are widely used in processed meats to extend their shelf life, by warding off bacteria that can cause diseases like salmonella, listeriosis, and botulism.

Crucially, they also add an alluringly tangy taste and a pink hue to products like bacon, making them appear more appetizing.

Though nitrate is relatively stable, it can be converted to the more reactive nitrite ion in the body.

When in the acidic environment of the stomach or under the high heat of a frying pan, nitrite can undergo a reaction to form nitrosamines, which have been linked to the development of various cancers.

For this reason, consumers want to limit consumption of these preservatives, but knowing how much is in a food has been difficult to determine.

Nitrites add an alluringly tangy taste and a shopper-seducing fresh-pink hue to products like sausages, ham, bacon and salami (file photo)

Nitrites add an alluringly tangy taste and a shopper-seducing fresh-pink hue to products like sausages, ham, bacon and salami (file photo)

Here, a worker packages slices of Mortadella, an Italian luncheon meat, in a factory (file photo)

Here, a worker packages slices of Mortadella, an Italian luncheon meat, in a factory (file photo)

So the researchers crated the new POLYSEN film – an abbreviation of ‘polymeric sensor’ – which is made of four monomers and hydrochloric acid.

First, to create a ‘reference chart’, discs punched from the film were placed on five different meat samples for 15 minutes, allowing the monomer units and acid in the film to react with nitrite.

The meat samples all had different nitrite concentrations, so the researchers knew the discs would vary in colour.

The discs were then removed and dipped in a sodium hydroxide solution for one minute to develop the colour.

The higher the nitrite present in the meat, the deeper each film’s yellowish hue became.

To calibrate the system, discs punched from the film were placed on five different meat samples for 15 minutes, allowing the monomer units and acid in the film to react with nitrite

To calibrate the system, discs punched from the film were placed on five different meat samples for 15 minutes, allowing the monomer units and acid in the film to react with nitrite

Next, the researchers created the smartphone app that uses colorimetry – which uses light to determine the concentration of particular compounds.

When photographed in the same image as the reference chart, the app can return a nitrite estimate for the sample disc.

The team tested the film on meats they prepared and treated with nitrite, in addition to store-bought meats.

They found the POLYSEN-based method produced results similar to those obtained with a traditional and more complex nitrite detection method.

In addition, POLYSEN complied with a European regulation for migration of substances from the film to the food.

While the team have only demonstrated the system for now, it could provide a user-friendly and inexpensive way for consumers to determine nitrite levels in foods in the future.

‘This study is intended as a proof of concept in which it has been demonstrated that the methodology is practical and works,’ they conclude.

NITRITES AND NITRATES: A FIRST

Nitrite and nitrate are commonly used for curing meat and other perishable produce.

They are also added to meat to keep it red and give flavour.

Nitrate is also found naturally in vegetables, with the highest concentrations occurring in leafy vegetables like spinach and lettuce.

It can also enter the food chain as an environmental contaminant in water, due to its use in intensive farming methods, livestock production and sewage discharge.

Nitrite in food (and nitrate converted to nitrite in the body) may contribute to the formation of a group of compounds known as nitrosamines, some of which are carcinogenic – ie, have the potential to cause cancer.

In 2015 the World Health Organization warned there were significant increases in the risk of bowel cancer from eating processed meats such as bacon that traditionally have nitrites added as they are cured.

The current acceptable daily intake for nitrates, according to the European Food Safety Authority (EFSA), is 3.7 milligrams per kilogram of body weight per day.

The EFSA’s acceptable daily intake for nitrites is 0.07mg per kilogram of weight each day.

Source: EFSA

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How a war between China and Taiwan could cause product shortages

China and Taiwan are on the brink of war after a long-standing dispute over the island’s sovereignty came to a head – with potentially massive implications for consumer technology supplies.

Taiwan is home to the world’s biggest producer of computer chips, Taiwan Semiconductor Manufacturing Company (TSMC).

TSMC’s chips are used in a wide variety of phones, including the iPhone 13; cars including the Renault Arkana SUV; gaming consoles including the Nintendo Switch and Playstation 5; and smart home devices including the Revcook smart toaster.

Rising tensions between China and Taiwan could disrupt the production of these chips, with knock-on effects throughout the global consumer electronics industry.

TSMC’s chairman has warned that a Chinese military force or invasion would make the firm’s facilities ‘inoperable’ because it relies on ‘real-time connection’ with Europe, with Japan and the US.

Experts have told MailOnline that, if TSMC is unable to produce chips at its current rate, it could affect availability of some popular tech devices as soon as Christmas – although the biggest effects are likely to be felt next year.

TSMC ¿ the most valuable company in Asia and the 10th most valuable company in the world ¿ develops chips for a range of big companies, predominantly Apple, but also AMD, MediaTek, Qualcomm, Broadcom, Nvidia and more.  The firm makes chips that go into iPhones, iPads and Apple's Silicon Macs, as well as automobiles and gaming consoles, including Nintendo's Switch and Sony's PlayStation 5

TSMC – the most valuable company in Asia and the 10th most valuable company in the world – develops chips for a range of big companies, predominantly Apple, but also AMD, MediaTek, Qualcomm, Broadcom, Nvidia and more. The firm makes chips that go into iPhones, iPads and Apple’s Silicon Macs, as well as automobiles and gaming consoles, including Nintendo’s Switch and Sony’s PlayStation 5

WHAT IS TSMC?

Founded in 1987, TSMC – the most valuable company in Asia and the 10th most valuable company in the world – develops chips for a range of huge players.

TSMC has semiconductor fabrication plants (‘fabs’) around the island, although its main operations are located in Hsinchu in the north.

According to the company’s website, TSMC produces more than 10,000 products for almost 500 clients worldwide.

Its biggest client is Apple, but other clients include AMD, MediaTek, Qualcomm, Broadcom, Nvidia and Marvell.

The firm makes A-series chips that go into iPhones and iPads, as well as M-series chips for Apple’s Silicon Macs.

TSMC chips are also in cars and gaming consoles, including Nintendo’s Switch and Sony’s PlayStation 5.

Ben Barringer, equity research analyst at Quilter Cheviot, told MailOnline that China would likely aim to preserve TSMC and ‘the brain power behind it’ if it took control of the island, in order to gain an advantage over US and Korean based semiconductor manufacturers.

‘Given its market position, the expertise it has and the complexity of the sector, TSMC is likely to remain of strategic importance to whoever governs Taiwan both now and in the future,’ Barringer said.

However, there could be ‘non-combat interventions’ from China such as potential blockades, I have suggested.

‘While this would not prevent TSMC from operating, it would limit what it could achieve and potentially delay any technological advancements,’ he said.

‘Clearly the threat of war in Taiwan would be very troubling for those involved and we can hope any tensions can be resolved diplomatically.’

Barringer also said that delays and shortages in consumer products would most likely occur next year, and that the new iPhone 14, expected to be released next month, will likely be safe because units will have already been built.

‘The third quarter of the year is extremely important for the semiconductor industry as this is when they produce the components that go into the products that will be bought and sold at Christmas,’ he told MailOnline.

‘If China were to invade imminently then we may see some knock-on effect, but even at this point of the year any delays and shortages would most likely occur in 2023.’

Home to the Taiwan Semiconductor Manufacturing Company (TSMC), the world's largest chip foundry, Taiwan produces more than half of the world's semiconductors

Home to the Taiwan Semiconductor Manufacturing Company (TSMC), the world’s largest chip foundry, Taiwan produces more than half of the world’s semiconductors

Beijing's People's Liberation Army (PLA) is conducting 'important military exercises and training activities including live-fire drills in the following maritime areas and their air space bounded by lines joining,' according to the state Xinjua News Agency

Beijing’s People’s Liberation Army (PLA) is conducting ‘important military exercises and training activities including live-fire drills in the following maritime areas and their air space bounded by lines joining,’ according to the state Xinjua News Agency

TSMC has semiconductor fabrication plants ('fabs') around the island, although its main operations are located in Hsinchu in the north.  Pictured are components sit on circuit boards on display at the Semicon Taiwan exhibition show in 2018

TSMC has semiconductor fabrication plants (‘fabs’) around the island, although its main operations are located in Hsinchu in the north. Pictured are components sit on circuit boards on display at the Semicon Taiwan exhibition show in 2018

Simon Thomas, CEO of British electronics company Paragraf, said consumers will experience ‘longer waiting times and less choice for new products’ if geopolitical conflict were to escalate.

‘As long as supply chain uncertainly continues, the impact on different product availability will become more widespread,’ he told MailOnline.

‘We are hoping that a military invasion of Taiwan is not inevitable, with the world already going through significant turmoil this would certainly be another globally impacting crisis.’

This week, TSMC’s chairman Mark Liu warned that a war between Taiwan and China would make ‘everybody losers’.

Liu told CNN: ‘If you take a military force or invasion, you will render TSMC factory not operable. Because this is such a sophisticated manufacturing facility, it depends on real-time connection with the outside world, with Europe, with Japan, with the US, from materials to chemicals to spare parts to engineering software and diagnosis.’

Mark Liu (pictured) is chairman of Taiwan Semiconductor Manufacturing Co. (TSMC).  This week, he warned that a war between Taiwan and China would make 'everybody losers' by making the firm's facilities 'inoperable'

Mark Liu (pictured) is chairman of Taiwan Semiconductor Manufacturing Co. (TSMC). This week, he warned that a war between Taiwan and China would make ‘everybody losers’ by making the firm’s facilities ‘inoperable’

China’s escalating military aggression comes in the midst of a global chip shortage that goes back to 2020.

The shortage was triggered when chipmaking factories around the world were forced to shut down due to the coronavirus pandemic as part of social distancing measures, which resulted in months of no production.

It was compounded due to the rise in demand for electronics, as most people were under stay-at-home orders.

Former President Donald Trump also created more demand for TMSC chips because of his sanctions on SMIC, a chip maker based in Shanghai, as well as other Chinese firms as part of his trade war on the country.

Another issue is severe droughts in Taiwan, as TSMC needs 156,000 tons of water every day to operate their microchip manufacturing plant – enough water to fill roughly 60 Olympic-sized swimming pools.

The chip shortage is so severe that one major industrial conglomerate resorted to purchasing washing machines and tearing the semiconductors out for use in their own chip modules, Bloomberg previously reported.

Nintendo’s president Shuntaro Furukawa recently said that there’s ‘no end in sight’ to the semiconductor shortage, and so the company’s Switch console will be in short supply this year.

Images of semiconductor wafers at the Taiwan Semiconductor Manufacturing Co. (TSMC) Museum of Innovation in Hsinchu

Images of semiconductor wafers at the Taiwan Semiconductor Manufacturing Co. (TSMC) Museum of Innovation in Hsinchu

Taiwan’s dominance in semiconductors has been referred to as a ‘Silicon Shield’, in that the US and other allies would defend it from military invasion in order to prevent its high-tech industry from falling into Chinese hands.

However, new military actions have stoked fears that this shield could be broken.

On Tuesday, Chinese military began ‘live-fire’ exercises around the self-governing island in an attempt to intimidate its democratic neighbour.

China is also pressing the US into dropping its support for Taiwan, as demonstrated by the visit of US House Speaker Nancy Pelosi this week.

China’s Ministry of Foreign Affairs called the visit a ‘serious disregard of China’s strong opposition’ before effectively blockading the island with military drills.

US House of Representatives Speaker Nancy Pelosi leaves the parliament in Taipei, Taiwan on August 3, 2022

US House of Representatives Speaker Nancy Pelosi leaves the parliament in Taipei, Taiwan on August 3, 2022

Why China set its sights on Taiwan

China and Taiwan have a long-standing dispute over the island’s sovereignty.

China considers Taiwan a part of its territory, more precisely a province, but many Taiwanese want the island to be independent.

From 1683 to 1895, Taiwan was ruled by China’s Qing dynasty. After Japan claimed its victory in the First Sino-Japanese War, the Qing government was forced to cede Taiwan to Japan.

The island was under the Republic of China’s ruling after World War II, with the consent of its allies, the US and UK.

The leader of the Chinese Nationalist Party, Chiang Kai-shek, fled to Taiwan in 1949 and established his government after losing the Civil War to the Communist Party and its leader Mao Zedong.

Chiang’s son continued to rule Taiwan after his father and began democratizing Taiwan.

In 1980, China put forward a policy called ‘one country, two systems,’ under which Taiwan would be given significant autonomy if it accepted Chinese reunification. Taiwan rejected the offer.

Taiwan today, with its own constitution and democratically-elected leaders, is widely accepted in the West as an independent state. But its political status remains unclear.

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