Tuesday April 24, 2018

Omega-3s from fish more effective in cancer prevention

The study involved feeding the different types of Omega-3s to mice with a highly aggressive form of human breast cancer called HER-2

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Based on the doses given in the study, humans should consume two to three servings of fish a week to have the same effect. Pixabay
Based on the doses given in the study, humans should consume two to three servings of fish a week to have the same effect. Pixabay
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  • Omega-3 fatty acids from fish pack a stronger punch than flaxseed and other oils
  • This study is the first to compare the cancer-fighting potency of plant-versus marine-derived Omega-3s on breast tumor development
  • Based on the doses given in the study, humans should consume two to three servings of fish a week to have the same effect

When it comes to cancer prevention, Omega-3 fatty acids from fish pack a stronger punch than flaxseed and other oils, new research has found.

Marine-based omega-3s are eight times more effective at inhibiting tumor development and growth than plant-based sources, said the study published in the Journal of Nutritional Biochemistry.

“This study is the first to compare the cancer-fighting potency of plant-versus marine-derived Omega-3s on breast tumor development,” said David Ma, Professor at the University of Guelph in Ontario.

ALSO READ: Here’s how eating fish could be IQ booster for your kid

There are three types of Omega-3 fatty acids: a-linolenic acid (ALA), eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). Pixabay
There are three types of Omega-3 fatty acids: a-linolenic acid (ALA), eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). Pixabay

“There is evidence that both Omega-3s from plants and marine sources are protective against cancer and we wanted to determine which form is more effective,” Ma said.

ALA is plant-based and found in such edible seeds as flaxseed and in oils, such as soy, canola and hemp oil.

EPA and DHA are found in marine life, such as fish, algae, and phytoplankton.

The study involved feeding the different types of Omega-3s to mice with a highly aggressive form of human breast cancer called HER-2.

Ma exposed the mice to either the plant-based or the marine-based Omega-3s.

“The mice were exposed to the different omega-3s even before tumors developed, which allowed us to compare how effective the fatty acids are at prevention,” said Ma.

Overall exposure to marine-based omega-3s reduced the size of the tumors by 60 to 70 percent and the number of tumors by 30 percent. Pixabay
Overall exposure to marine-based omega-3s reduced the size of the tumors by 60 to 70 percent and the number of tumors by 30 percent. Pixabay

ALSO READ: Benefits of eating fish in boosting IQ

However, higher doses of the plant-based fatty acid were required to deliver the same impact as the marine-based Omega-3s, the study said.

Omega-3s prevent and fight cancer by turning on genes associated with the immune system and blocking tumor growth pathways, said Ma.

Based on the doses given in the study, humans should consume two to three servings of fish a week to have the same effect, he said. (IANS)

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Google AI can focus on individual speakers in a crowd

The visual signal not only improves the speech separation quality significantly in cases of mixed speech, but, importantly, it also associates the separated, clean speech tracks

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Google india launches 'Tz' to help people pay their utility bills. Wikimedia Commons
Google AI to identify speakers from crowd. Wikimedia Commons

Just as most smartphone cameras now allow users to focus on a single object among many, it may soon be possible to pick out individual voices in a crowd by suppressing all other sounds, thanks to a new Artificial Intelligence (AI) system developed by Google researchers.

This is an important development as computers as not as good as humans at focusing their attention on a particular person in a noisy environment. Known as the cocktail party effect, the capability to mentally “mute” all other voices and sounds comes natural to us humans.

Google has collaborated with getty images. Wikimedia Commons
Google AI will identify individual speakers now. Wikimedia Commons

However, automatic speech separation — separating an audio signal into its individual speech sources — remains a significant challenge for computers, Inbar Mosseri and Oran Lang, software engineers at Google Research, wrote in a blog post this week. In a new paper, the researchers presented a deep learning audio-visual model for isolating a single speech signal from a mixture of sounds such as other voices and background noise.

“In this work, we are able to computationally produce videos in which speech of specific people is enhanced while all other sounds are suppressed,” Mosseri and Lang said. The method works on ordinary videos with a single audio track, and all that is required from the user is to select the face of the person in the video they want to hear, or to have such a person be selected algorithmically based on context.

Also Read: Want To Know What Facebook, Google Know About You?

The researchers believe this capability can have a wide range of applications, from speech enhancement and recognition in videos, through video conferencing, to improved hearing aids, especially in situations where there are multiple people speaking. “A unique aspect of our technique is in combining both the auditory and visual signals of an input video to separate the speech,” the researchers said.

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This will also help in speech enhancement . VOA

“Intuitively, movements of a person’s mouth, for example, should correlate with the sounds produced as that person is speaking, which in turn can help identify which parts of the audio correspond to that person,” they explained.

The visual signal not only improves the speech separation quality significantly in cases of mixed speech, but, importantly, it also associates the separated, clean speech tracks with the visible speakers in the video, the researchers said. IANS