Daily Archives: 30 May 2024

Lipids in herbal teas with potential health benefits

Leave a Reply

Herbal teas are cherished globally for their delightful flavours and refreshing qualities and their array of reputed health benefits. However, the significance of a specific group of compounds known as lipids within these teas has just been thoroughly investigated. A team from Hokkaido University, under the leadership of Associate Professor Siddabasave Gowda and Professor Shu-Ping Hui from the Faculty of Health Sciences, has made a groundbreaking discovery in this area. They identified 341 different molecular species from five lipid categories in samples from four herbal tea types, and their findings were published in the journal Food Chemistry.

Lipids, a varied group of naturally occurring substances, are characterised by their insolubility in water. This group includes all fats and oils commonly found in many foods, but they have seldom been studied as significant elements in teas. The research team at Hokkaido University chose four types of teas for their study: dokudami (Houttuynia cordata, also known as fish mint), kumazasa (Sasa veitchii), sugina (Equisetum arvense, commonly known as common horsetail), and yomogi (Artemisia princeps, or Japanese mugwort).

These indigenous to Japan herbs have been consumed as tea since ancient times, attributed to their medicinal properties. The health benefits associated with these and other herbal teas are extensive, ranging from antioxidant to anti-aging properties, including antioxidant, antiglycation, anti-inflammatory, antibacterial, antiviral, anti-allergic, anticarcinogenic, antithrombotic, vasodilatory, antimutagenic, and anti-aging effects.

The lipids in these teas were identified and separated through advanced analytical techniques, specifically high-performance liquid chromatography and linear ion trap-Orbitrap mass spectrometry. The study unveiled notable lipid profile variations among the tea types, each containing bioactive lipids. Among these were a unique group of lipids called short-chain fatty acid esters of hydroxy fatty acids (SFAHFAs), some of which had never been identified in plants. These SFAHFAs could represent a new source of short-chain fatty acids, crucial metabolites for maintaining gut health.

Professor Hui highlighted the discovery of these novel SFAHFAs as a gateway to further research, noting that the lipid concentrations detected could have significant nutritional and medicinal impacts on consumers. The identified lipids also included α-linolenic acid, known for its anti-inflammatory effects, and arachidonic acid, linked to various health benefits. These compounds are part of a broader group of poly-unsaturated fatty acids in the teas, renowned for their nutritional advantages.

In conclusion, this initial study by Professor Gowda and his team sets the stage for a deeper exploration into the role of lipids in herbal teas and their extensive implications for human health and nutrition. The team is eager to broaden their research to characterise the lipid content in over 40 different types of herbal tea shortly, opening new avenues for understanding and leveraging the health benefits of these traditional beverages. Herbal teas are cherished globally for their delightful flavours and refreshing qualities and their array of reputed health benefits. However, the significance of a specific group of compounds known as lipids within these teas has just been thoroughly investigated. A team from Hokkaido University, under the leadership of Associate Professor Siddabasave Gowda and Professor Shu-Ping Hui from the Faculty of Health Sciences, has made a groundbreaking discovery in this area. They identified 341 different molecular species from five lipid categories in samples from four herbal tea types, and their findings were published in the journal Food Chemistry.

Lipids, a varied group of naturally occurring substances, are characterised by their insolubility in water. This group includes all fats and oils commonly found in many foods, but they have seldom been studied as significant elements in teas. The research team at Hokkaido University chose four types of teas for their study: Dokudami (Houttuynia cordata, also known as fish mint), Kumazasa (Sasa veitchii), Sugina (Equisetum arvense, commonly known as common horsetail), Yomogi (Artemisia princeps, or Japanese mugwort).

These herbs, indigenous to Japan, have been consumed as tea since ancient times, attributed to their medicinal properties. The health benefits associated with these and other herbal teas are extensive, ranging from antioxidant to anti-aging properties, including antioxidant, antiglycation, anti-inflammatory, antibacterial, antiviral, anti-allergic, anticarcinogenic, antithrombotic, vasodilatory, antimutagenic, and anti-aging effects.

The lipids in these teas were identified and separated through advanced analytical techniques, specifically high-performance liquid chromatography and linear ion trap-Orbitrap mass spectrometry. The study unveiled notable lipid profile variations among the tea types, each containing bioactive lipids. Among these were a unique group of lipids called short-chain fatty acid esters of hydroxy fatty acids (SFAHFAs), some of which had never been identified in plants. These SFAHFAs could represent a new source of short-chain fatty acids, crucial metabolites for maintaining gut health.

Professor Hui highlighted the discovery of these novel SFAHFAs as a gateway to further research, noting that the lipid concentrations detected could have significant nutritional and medicinal impacts on consumers. The identified lipids also included α-linolenic acid, known for its anti-inflammatory effects, and arachidonic acid, linked to various health benefits. These compounds are part of a broader group of poly-unsaturated fatty acids in the teas, renowned for their nutritional advantages.

In conclusion, Professor Gowda and his team’s initial study sets the stage for a deeper exploration of the role of lipids in herbal teas and their extensive implications for human health and nutrition. The team is eager to broaden their research to characterise the lipid content in over 40 different types of herbal tea shortly, opening new avenues for understanding and leveraging the health benefits of these traditional beverages.

More information: Lipsa Rani Nath et al, Dissecting new lipids and their composition in herbal tea using untargeted LC/MS, Food Chemistry. DOI: 10.1016/j.foodchem.2024.138941

Journal information: Food Chemistry Provided by Hokkaido University

Harnessing the Transformative Potential of Expressive Writing: Navigating Anger through Emotional Liberation

Leave a Reply

In a groundbreaking study, a team of Japanese researchers has introduced a unique method for managing anger: the act of writing down one’s reaction to a negative event on paper, then discarding it, has shown a significant decrease in anger. Lead researcher Nobuyuki Kawai was amazed at the effectiveness of this seemingly simple practice. This novel discovery has profound implications for both personal and professional anger management, offering a potential solution to the detrimental effects of uncontrolled anger.

The importance of this research is underscored by the need for empirical validation of many existing anger management techniques, which often prove challenging to implement during moments of heightened emotion. Published in Scientific Reports, the study represents the culmination of an extensive investigation into the correlation between written expression and anger reduction, building upon prior research that highlights the impact of physical actions on mood regulation.

In their experiment, Kawai and his graduate student, Yuta Kanaya, engaged participants in expressing brief opinions on significant social issues, only to subject them to harsh criticism from fictitious evaluators—intentionally provoking genuine emotional responses. Following negative feedback, participants were prompted to reflect on the emotional triggers caused by the criticism.

Participants were subsequently divided into two groups: one instructed to dispose of their written responses and the other to retain them. Disposal methods ranged from discarding the paper in a bin to shredding it. The results revealed a substantial contrast in anger levels between the two groups. Those who disposed of their written responses reported a swift return to baseline anger levels, while those who retained the documents experienced only marginal decreases in anger.

Lead researcher Kawai envisions practical uses for this research, particularly in high-stress environments such as the workplace. By encouraging individuals to write down the source of their anger, similar to taking a memo and promptly disposing of it, this technique offers a viable strategy for managing anger in real-time situations.

Aside from its practical implications, this discovery may shed light on the cultural practice of hakidashisara—a traditional Japanese ritual involving the symbolic release of anger. Held annually at the Hiyoshi shrine in Kiyosu, Aichi Prefecture, hakidashisara involves the symbolic smashing of small discs representing sources of rage. The similarities between this cultural tradition and the research findings suggest a shared mechanism for emotional release and relief, underscoring the cultural significance of this research.

This study by the Japanese research group sheds light on the therapeutic potential of expressive writing in anger management. This research offers a promising avenue for improving emotional well-being and interpersonal dynamics by demonstrating the effectiveness of a simple yet potent technique. Moreover, its cultural implications illuminate age-old practices of emotional catharsis, bridging the gap between scientific inquiry and cultural tradition.

More information: Yuta Kanaya et al, Anger is eliminated with the disposal of a paper written because of provocation, Scientific Reports. DOI: 10.1038/s41598-024-57916-z

Journal information: Scientific Reports Provided by Nagoya University

Birds flock by coordinating movements, unveiling new aerodynamic phenomena via mathematical research

Leave a Reply

During the early weeks of spring, gazing skyward may offer the sight of migrating birds moving in seamless unison. But how do these creatures achieve such coordinated flight? A team of mathematicians has unveiled previously unknown aerodynamic interactions, shedding light on this natural phenomenon. Their findings, published in Nature Communications, deepen our understanding of wildlife behaviour, including fish schooling, and hold potential implications for transportation and energy sectors.

Leif Ristroph, from New York University’s Courant Institute of Mathematical Sciences, underscores the significance of studying how animals harness environmental flows to conserve energy or reduce resistance. Beyond being a fascinating exploration of nature’s mechanisms, their research may offer crucial insights into efficient propulsion methods in transportation and optimising energy harvesting from wind or water currents, potentially revolutionising these sectors.

The study reveals that aerodynamic effects vary with flock size, benefiting smaller groups while disrupting larger ones. Sophie Ramananarivo, one of the authors, explains that smaller bird flocks maintain precise positions relative to their neighbours through aerodynamic interactions. At the same time, more prominent groups experience disruptions that can lead to collisions.

Previous research by Ristroph and colleagues focused on the interactions of two birds, but this study extends the investigation to larger groups. To simulate bird formations, researchers used mechanised flappers resembling bird wings, propelled through water to mimic airflow. Observations showed that flow dynamics influenced group organisation differently depending on flock size.

For small groups, aerodynamic interactions effortlessly aided members in maintaining orderly spacing. However, larger groups faced challenges as flow interactions caused members to shudder and lose formation, often resulting in collisions. Mathematical modelling supported these experimental findings, revealing flow-mediated interactions as spring-like forces holding flock members in place.

These “springs” operate unidirectionally, allowing lead birds to influence followers but not vice versa, resulting in oscillations known as “flonons.” Joel Newbolt, a former NYU graduate student, draws parallels between flock dynamics and vibrational waves in material physics, likening orderly flocks to atoms in a crystal lattice.

In essence, this research uncovers the intricate aerodynamic principles governing bird flocking behaviour, offering insights that deepen our understanding of the natural world and transcend into the realms of transportation efficiency and energy optimisation. By understanding and applying these principles, we can enhance the efficiency of transportation systems and optimise energy use, contributing to a more sustainable future.

More information: Joel W. Newbolt et al, Flow interactions lead to self-organized flight formations disrupted by self-amplifying waves, Nature Communications. DOI: 10.1038/s41467-024-47525-9

Journal information: Nature Communications Provided by New York University