Friday, 5 January 2024

Health and Wellness News: Carrot: A highly nutritious, versatile vegetable - explainer

 

Carrot: A highly nutritious, versatile vegetable - explainer


A nutrition expert sheds light on the many benefits of carrots, which can do a lot more than just improve your eyesight.


Thursday, 4 January 2024

Mouse study shows gut biome plays a role in social anxiety disorder

JANUARY 3, 2024, **REPORT** by Bob Yirka , Medical Xpress

SAD FMT modulates basal stress hormone corticosterone plasma levels. 
(A) Basal plasma corticosterone is significantly reduced in the SAD group compared to HC 
(B) The stress response timeline measured by plasma corticosterone collected at 30-min intervals over 90 min. There was a significantly lower concentration of plasma corticosterone at the basal timepoint (0 min) in the SAD compared to HC group and no significant effects at the 30-, 60-, or 90-min time points. 
Credit: Proceedings of the National Academy of Sciences (2023). DOI: 10.1073/pnas.2308706120

A large team of medical, psychological and social researchers at University College Cork, in Ireland, working with a colleague from University Hospital Frankfurt, in Germany, has found that certain microbes in the gut biome may play a role in social anxiety disorder. In their study reported in the Proceedings of the National Academy of Sciences the group conducted experiments with fecal transplants in mice and tested them for anxiety.

Social anxiety disorder (SAD) is a condition in which a person experiences higher than normal levels of anxiety when exposed to people in a social setting, particularly people they don't know. Such settings can include parties, participating in classroom discussions or even standing in line at the grocery store.

Prior research has suggested that conditions in the gut microbiome can have an impact on emotions, which led the team on this new effort to wonder if certain microbes in the gut microbiome might play a role in SAD. To find out, they designed and carried out an experiment with lab mice.

The researchers gave the mice drugs to kill their gut microbiomes and then gave some of them fecal transplants from people with SAD. Others were given fecal transplants from people who did not have the disorder to serve as a control.

After administering the transplants, the researchers exposed the test mice to a variety of social environments, which included interacting with groups of mice they knew and groups that they did not know. They found that the test mice given the SAD fecal transplants displayed symptoms of SAD, while those given the control did not. They also noted that they saw no differences in anxiety between the groups when the mice were interacting with mice they already knew.

The research team also found what they describe as substantial differences in the mix of microbes in the microbiomes of the two groups—most specifically, they found lower numbers of three types of bacteria in the mice who had been given SAD fecal transplants. They also found different levels of brain chemicals (such as oxytocin) in the two groups, and differences that appeared to promote inflammation in the SAD group.


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Chuck's picture corner to New Year's 2024

We traveled to visit friends, their towns much larger than ours. Along with the prices to eat at a restaurant.

still here in Lo de Marcos

a string puppet on the wall at the cafe

another puppet at the cafe

Now we are in Bersareius, an outskirt town to Peurto Vallarta

Part of the large bay Peurto Vallarta in the background moutains



cactus garden

From the restaurant where we had a very expensive supper.

Now in La Cruz a little further north along the bay.


grill work

 a trinket stores stuff on the street

 some of the much stuff they had inside.

I thought this was a ficus, but was told it's a bunyon tree.

highend silver works through the window.

a local vulture

The fireworks went off all around the very bay at midnight, we got to view them from Gary's penthouse balcony with a few other couples.


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Archaeology News: 4,000 year old palace discovered in central China

 

4,000 year old palace discovered in central China


The archeological discovery sheds light on the architecture built during the Xia dynasty, an early Chinese dynasty mentioned in legends.


Archeologists have discovered the remains of a 4,000-year-old palace in an ancient Chinese walled city at the archeological site of Xinmi, in Henan Province, central China, state-run news agency Xinhua reported.

The ancient walled city at Xinmi is thought to have been built during the Xia dynasty, between 2070 BCE and 1600 BCE. 

Archaeologists discovered the remains of this ancient city several years ago on the eastern bank of the Zhenshui River, covering a rectangular area of approximately 176,000 square meters. 

This well-preserved walled city is associated with the Longshan Culture, an ancient civilization that once inhabited the area covered by modern Henan province and other neighboring regions of China. 

The remains of the palace consist of a foundation structure built with rammed-earth construction techniques using compacted raw materials like earth, chalk, or lime. 

  (credit: Shutterstock / DnDavis)
                          (credit: Shutterstock / DnDavis)

The remains of the palace are approximately 60 by 30 meters and cover an area of over 1,800 square meters. It is high at the center and low on all four sides, with a flat surface and rows of evenly distributed column holes. 

Palace remains shed light on ancient construction styles

The holes in the structure shed light on what the ancient complex once looked like. Li Bo, head of the excavation team, told Xinhua that they believe the holes show that “the foundation belonged to a housing complex with terraces in the south and north, cloisters in the east and west, and a yard in the center.”

Other archeological discoveries thought to date back to the Longshan Culture and the Xia dynasty period were made in an ancient city in Zhoukou, also located in Henan Province. Researchers found the remains of ash pits, ditches, and other architectural remnants at the Zhuqui Temple site. 

Outstanding among these discoveries were the remains of two circular buildings consisting of earth columns and adobe walls, likely used for grain storage. 

Fang Lixia, an archaeologist who led the excavation team in Zhoukhou told Xinhua that these findings will shed light on ancient agricultural practices in the region. 

Henan Province is home to several archeological discoveries dating back to a variety of ancient Chinese dynasties. 


Wednesday, 3 January 2024

Archaeology News: Ancient accessorized skeletons discovered in building works in Rome

 

Ancient accessorized skeletons discovered in building works in Rome


The remains were thought to have been from between the second and fourth centuries.


Tuesday, 2 January 2024

Health and Wellness News: Food for thought: Best foods to improve brain performance

 

Food for thought: Best foods to improve brain performance


Orna Avidan, naturopath at Maccabi Tivi: "Fueling your body with a nutritious breakfast, lunch, and dinner is not just about satisfying hunger; it's a profound investment in your overall well-being."


Microbes May Be The Secret Behind Keto Diet's Protection Against Epileptic Seizures

02 January 2024, By MIKE MCRAE

(Thom Leach/Science Photo Library/Getty Images)

Diets that are higher in fat and significantly lower in carbohydrates are known to have a drastic effect on reducing the incidence of seizures in individuals with drug-resistant forms of epilepsy, particularly among children.

While it's becoming apparent the diet creates some sort of shift in the gut's microflora, the precise nature of those changes and their connection to the prevalence of seizures remains a mystery.

In a prospective study on children and experiments involving mice, researchers from the University of California, Los Angeles (UCLA) bring us a step closer to understanding how the foods we eat alter the functions of microbes in our digestive system, which in turn affect a variety of neurological functions suspected to play a role in epilepsy.

Around 50 million people around the world experience recurrent storms of electrical discharge across the brain in what is diagnosed as epilepsy, resulting in anything from moments of inattention to severe convulsions.

Most benefit from medication, yet for around 30 percent, their condition is regarded as refractory, or treatment-resistant.

Famously referred to as a keto diet, a balance of nutrition that restricts the daily intake of starches and sugars has been touted as a means of losing weight since the 1970s.

While the keto diet's health benefits for most people have been debated, there's mounting evidence that fat-rich, carbohydrate-poor diets somehow reduce the risk of seizures in those with refractory epilepsy.

Studies estimate around 30 percent of children with treatment-resistant epilepsy become seizure-free while on the diet, while around 60 percent gain "substantial benefits" by having the frequency of their seizures more than halved.

Unfortunately, sticking to the diet can be a challenge. Children can be picky eaters as it is, without further restricting what they can eat. Throw in gastrointestinal issues, risk of kidney stones, and a variety of other side effects, and it's little wonder that all but a handful will stick to the keto diet over the years.

By learning how a particular mix of nutrients results in neurological changes that reduce the chance of a seizure, researchers hope they can devise new treatments that don't rely on such a tailored diet.

"Narrowing down the functions of the microbes that are beneficial toward seizure protection can potentially lead to new ways to enhance the efficacy of the ketogenic diet or to mimic its beneficial effects," says the study's lead author, UCLA molecular biologist Gregory Lum.

Working in the UCLA laboratory of biologist Elaine Hsaio, Lum led a team of researchers in an investigation that unveiled a critical network of interactions between the microbes in the guts of epileptic mouse models, the chemicals they produce, and the products of genes in the hippocampus.

After verifying the effects of a keto diet on the gut biomes of 10 children with pediatric refractory epilepsy at UCLA Mattel Children's Hospital, Lum and his team conducted an experiment in which they introduced the children's microflora into the guts of engineered mice.

Microflora samples collected from the children who had been on the keto diet for about a month proved to be more effective in reducing seizures in the mice than samples collected prior to the children commencing the diet.

The researchers also uncovered metabolic changes in both humans and mice related to energy production, amino-acid metabolism, and specific forms of oxidation of fatty acids.

Mice who received microbiomes altered by the keto diet were found to have changes in gene activity in the hippocampal area that have been previously linked to epilepsy.

Deducing how these changes specifically dampen conditions that give rise to seizures could point the way to drugs tailored to work where other medications have failed.

Even among those who never experience epilepsy, the research is just one more example of how the multitude of organisms living inside our guts play an integral role in determining how our entire body functions. It's time we learned how to eat not just for ourselves, but for them as well.

This research was published in Cell Reports.


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A Persistent Rumor Suggests This Tree Can Walk Around, But Is It True?

01 January 2024, By CARLY CASSELLA

(GaiBru_Photo/Getty Images)

The stories we tell ourselves about the natural world can sometimes stretch far from the truth.

For years, visitors to the rainforests of Central and South America have been told of a tree that slowly ambles around on its stilted roots.

The lore of the so-called walking palm (Socratea exorrhiza) has persisted since at least 1980 when anthropologists John H. Bodley and Foley C. Benson detailed the plant's unbelievable behavior in a scientific paper.

According to Bodley and Benson, when toppled by falling trees or branches some palms in eastern Peru can "right themselves and "walk" out from under the obstacle", away from their point of germination.

The palms were said to chase sunlight through the forest using the dozen or so roots that spring from their elevated trunks.

Sometimes, these roots sit several meters above the ground, and as Bodley explained all those decades ago, when they break away or rot, newer legs can probe patches of soil that are slightly further away.

A diagram illustrating how the stilt roots of Socratea exorrhiza might move from the place of germination.
 (Bodley et al., Biotropica, 2009)



To this day, rainforest guides in Latin America commonly tell tourists that walking palms can shift their position as much as 20 meters a year.

But while a few individual scientists think there could be a grain of truth to the narrative, the tip-toeing nature of this tree is most probably a myth.

When you look at the evidence, it doesn't really have legs to stand on.

In 2005, tropical ecologist and palm expert Gerardo Avalos published a study that found S. exorrhiza does not actually wander from its spot of germination.

In the paper, Avalos and his colleagues agree that when the walking palm is knocked over, it can rapidly grow new roots to deal with the loss of stability, but it does not actually move very much at all.

In an interview with the Italian illustrator and writer, Elisa Paganelli, Avalos explains that the walking palm is fixed to its place of germination, although, like other rainforest plants, it can still stretch itself somewhat to seek the light.

Socratea exorrhiza, the walking tree in a jungle in Costa Rica. 
(GaiBru_Photo/Getty Images)

The scientist admits that "it's kind of impressive and amazing to believe" that the walking palm can actually walk, but he says "it's just a legend."

"For one thing," Avalos points out in a correspondence with Benjamin Radford from the Skeptical Inquirer in 2009, "a large cone of stilt roots takes a long time to develop. Changes in canopy light conditions are more dynamic, with holes in the canopy being open at the same time that others are closed."

The idea that a walking palm could move fast enough to seek out these light gaps is unrealistic, Avalos argues.

The roots of Socratea exorrhiza. 
(helovi/Getty Images)

In 2007, another study on the curious species came to the same conclusion as Avalos and his colleagues.

The real mystery that still persists, however, is why the walking palm has such long legs if not to walk.

Back in the 1960s, scientists thought these extreme roots evolved to cope with flooding events, but there's not a lot of convincing evidence to support that idea either.

In more recent years, researchers have argued that in dense rainforests, the stilt roots of walking palms allow the species to more easily increase its height and stability, exploiting light gaps in the canopy overhead without expending energy on a thicker trunk.

While many will no doubt continue to talk the talk about this tree, the evidence at this stage suggests the species does not actually walk the walk.

That's a tall tale.


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Monday, 1 January 2024

The Natural World News: Pandas use scent, feces as form of social networking - study

 

Pandas use scent, feces as form of social networking - study


Pandas are big users of social media, according to a recent scientific study. Scent-marking trees serve as a panda version of Facebook.


Scientists reveal that pandas use fecal matter on trees as a form of social networking, according to a study recently published in the peer-reviewed journal Ursus.

Pandas have long been portrayed as solitary beasts. However, a recent study shows that not only do they hang out with family and friends – they’re also big users of social media. Scent-marking trees serve as a panda version of Facebook.

As any dog owner knows, their pets love to smell objects to collect information when taken for a walk. They also mark their scent on trees and walls so they can remember where they have been, and so other dogs can follow them. 

Analyses of animal social networks have traditionally been conducted on species that exhibit social behaviors such as group living, but relatively less work has been done on species that are thought of as solitary, cryptic, and that communicate through scent-marking cues. 

Fecal matter reveals key insights into panda social life  

A recent article in the international journal Ursus under the title “Social network analysis uncovers hidden social complexity in giant pandas” paints a new lifestyle picture of the beloved bears in China’s Wolong Nature Reserve. The lives of these huggable-looking mammals are usually shielded from human eyes because they’re shy, rare, and live in densely forested, remote areas. They use scent marking to keep track of both family members and friends, leave updates about life events, and check out the dating scene.

Lead author Dr. Thomas Connor did this work for his Ph.D. from Michigan State University’s Center for Systems Integration and Sustainability (MSU-CSIS) by spending months hanging out in those forests, watching for signs of pandas since sightings in the wild are much more uncommon. His work was built on previous observations by other MSU-CSIS scientists who suspected pandas likely weren’t the total loners everyone believed them to be.

 A giant panda eats bamboo inside an enclosure at the Moscow Zoo on a hot summer day in the capital Moscow, Russia June 7, 2019. (credit: REUTERS/TATYANA MAKEYEVA/FILE PHOTO)
A giant panda eats bamboo inside an enclosure at the Moscow Zoo on a hot summer day in the capital Moscow, Russia June 7, 2019. (credit: REUTERS/TATYANA MAKEYEVA/FILE PHOTO)

The researchers used noninvasive fecal genetic sampling, conducted from March 2015 to February 2016, to identify individuals of one such species, the giant panda (Ailuropoda melanoleuca), across a study population in southwestern China.

“Once you’ve gotten an eye for it, you can see on ridge tops and different trails the scent-marking trees, which are stained with a waxy substance – and the pandas seem to be doing this a lot,” Connor said. “It was pretty evident they were exchanging information through scent marking behavior.”

To link the marked trees with an understanding of pandas' social structure, nearby panda communities needed to be documented. To explore that hunch, Connor teamed up with MSU Foundation Sociometrics Prof. Ken Frank, an expert on social networks and a co-author of the article.

The researchers didn’t have a camera on a bear every time it sniffs a tree. “That’s a key part,” Frank said. “I told him that once he has data on which bears are close to each other, we can use the techniques and theories that apply to humans to understand their social networks, and these scent trees are social media. Like Facebook, it’s asynchronous, meaning you don’t have to be in the same place at the same time. It allows one to broadcast to many, and it’s a record. A panda marking a tree isn’t so different from a Facebook post."

To determine which bears were close to each other, Connor dug into a wealth of data he had collected in the form of fresh panda poop. Panda feces are the gold standard of panda watching. What pandas lack in obvious sociability, they make up for in poop production – going some 90 times a day. That means they leave a reliable trail. Connor was able to extract DNA from the fresh panda poop he and his colleagues collected in a 46-square-kilometer area known as the prime panda habitat.

Information from the scat allowed them to identify specific pandas in the vicinity of the scent-marking trees and showed if these pandas were related to each other. That allowed them to combine that with the information from their chosen communication method – the scent trees – to explore their social network.

Pandas socialize in clique-like fashion

“We defined two panda individuals within a certain distance from each other as an association, Connor said. “Even if they’re not directly communicating or running into each other physically, they can exchange information in the chemical scent signature. That built up the social network for the analysis.”

Frank said that once they could determine the bears were in proximity, they could apply the social network technique of community or clique detection. “It’s pretty much like high school,” Frank said. “And like in high school, cliques have lots of implications. There are strong norms within a clique – and while encountering those outside a clique is rare, the information can be very important.”

The scent-marking trees are ripe with information, telling the sniffer who the animal is if they’ve encountered them before. It also tells the marker’s sex, an idea of how dominant and large the bear is, and whether they’re ready to mate.

Connor said the most tantalizing information they gleaned is that in non-mating seasons, the pandas seem to be hanging mostly with other family members – but they seemed to branch out in mating seasons, probably using the scent-marking trees as a territory map.

Connor noted this result was preliminary and limited by small sample sizes but was a tantalizing one that should be studied more. 

“The discoveries in this study shed new light on how pandas use their habitat,” said Jianguo “Jack” Liu, a senior author of the article and CSIS director. “Pandas are a part of coupled human and natural systems where humans share their habitat. Anything we can learn about how they live and what they need can ultimately help inform good conservation policies and maybe understand our own behavior a little more,” he concluded.