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Digitally cataloging archived plant specimens can transform conservation efforts

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Digitally cataloging archived plant specimens can transform conservation efforts


Digitally cataloging archived plant specimens can transform conservation efforts
Herbarium specimens and community science observations differ in terms of how they are collected and what biodiversity data they record. Credit: Nature Communications (2024). DOI: 10.1038/s41467-024-51899-1

Digitally cataloging the more than 300 million plant specimens preserved in museums worldwide could yield crucial insights into how to preserve biodiversity amid climate change, a study by McGill University researchers has found.

Digitally cataloging, or digitizing, a herbarium specimen involves recording the species name and original location and uploading that record to a digital repository that is publicly accessible.

The authors used trends in already-catalogued data to predict how digitizing Canada’s 7.3 million undigitized plant specimens, housed in 88 herbaria across the country, could increase our understanding of plant biodiversity and ultimately inform conservation policy.

“These sorts of georeferenced biodiversity observations are critical to informing conservation, as they provide detailed information on the geographic distribution of species across the country,” said Isaac Eckert, Ph.D. candidate in the Department of Biology and lead author of the study published in Nature Communications.

“Our findings show digitizing our remaining specimens is likely an efficient and feasible method of gathering the critical biodiversity data we need to inform policy and action,” said Eckert.

The future of conservation

As nations worldwide strive to meet their 2030 and 2050 conservation goals, the availability and quality of biodiversity data will be crucial to their success, the researchers said.

The researchers also expressed hope their findings help make the case for increasing funding to herbaria, at a time when some active herbaria are threatened by a lack of funding, as seen with the recent closure of Duke University’s herbarium.

“We show that investing in herbaria, their collections, and the experts that curate them, is potentially one of the most effective ways to generate new biodiversity data,” said Eckert, who is supervised by Laura Pollock, Assistant Professor in McGill’s Department of Biology.

The authors note that, alongside digitized herbarium specimens, community or citizen science observations such as those made though platforms like iNaturalist, can also provide valuable biodiversity data. However, their results show herbarium specimens are less prone to biases and more efficiently capture the diversity and distribution of Canadian plant species.

More information:
Isaac Eckert et al, Herbarium collections remain essential in the age of community science, Nature Communications (2024). DOI: 10.1038/s41467-024-51899-1

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McGill University


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Digitally cataloging archived plant specimens can transform conservation efforts (2024, September 9)
retrieved 9 September 2024
from https://phys.org/news/2024-09-digitally-archived-specimens-efforts.html

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New fusion reactions could lead to long-lasting superheavy nuclei with unique properties

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New fusion reactions could lead to long-lasting superheavy nuclei with unique properties


New fusion reactions could lead to long-lasting superheavy nuclei with unique properties
In nuclear physics, the “island of stability ” refers to a hypothesized group of heavier transuranium isotopes, predicted to be significantly more stable than their neighboring isotopes, with expected half-lives ranging from minutes or days to, according to some optimists, even millions of years. Various theoretical methods have predicted the center of the “island of stability ” to be at Z=114,120,124 or 126 and N=184. Credit: Minghao Zhang

A team of scientists has made significant progress in the ongoing quest to create new, long-lasting superheavy nuclei. These double magic nuclei, characterized by a precise number of protons and neutrons that form a highly stable configuration, are exceptionally resistant to decay.

Their study could deepen our understanding of the forces that bind atoms and pave the way for the development of new materials with unique properties.

The research, published in the journal Nuclear Science and Techniques, is a step closer to reaching the so-called “Island of Stability,” a region in the nuclei chart where it’s believed some of these nuclei might exist for much longer than those created so far.

In the search for ‘Island of Stability’

The research, led by Professor Feng-Shou Zhang, has predicted promising reactions between different elements that could be used in experiments to create double magic nuclei. One key discovery involves a reaction between a special type of radioactive calcium isotope and plutonium target, which could produce the predicted double magic nuclei 298Fl.

Another potential double magic nuclei, 304120, could be created by combining vanadium and berkelium, although this reaction is currently less likely to succeed.

  • New fusion reactions could lead to long-lasting superheavy nuclei with unique properties
    Comparison of the calculated evaporation residue cross section given by the DNS model and the experimental data. Credit: Minghao Zhang
  • New fusion reactions could lead to long-lasting superheavy nuclei with unique properties
    The dinuclear system model has proven to be a reliable tool for reproducing experimental results of fusion reactions. In this model, the projectile and target nuclei must overcome the Coulomb barrier to form a dinuclear system. Subsequently, nucleons are transferred from the projectile to the target, leading to the formation of a compound nucleus. To reach its ground state, the compound nucleus must then evaporate neutrons. Credit: Minghao Zhang
  • New fusion reactions could lead to long-lasting superheavy nuclei with unique properties
    Based on the dinuclear system model, the radioactive projectile 58Ca and the 244Pu target are predicted to be favorable for producing the predicted double-magic nucleus 298Fl. Additionally, this research investigates the synthesis of another predicted double-magic nucleus, 304120, with the 58V +249Bk reaction to be optimal. Credit: Minghao Zhang

Exploring new paths in nuclear science

The idea of creating these superheavy nuclei is exciting because they could offer new insights into atomic structure and possibly lead to the development of advanced materials. If these elements can be made and remain stable, they might have unique properties that could be useful in various scientific fields.

To make these discoveries, the research team used advanced theoretical models designed to study heavy ion collisions. By carefully choosing the right combinations of projectiles and targets, the scientists have laid out a clear path for future experiments that could bring us closer to achieving these goals.

Despite the progress, there are still challenges ahead, such as improving the efficiency of these reactions. However, this research brings us closer to understanding the “Island of Stability” and the intriguing possibilities it holds. The work not only advances the field of nuclear physics but also sets the stage for future discoveries that could have wide-ranging impacts in science and technology.

This research was conducted in collaboration with Beijing Normal University, Beijing Academy of Science and Technology, Guangxi University, and the National Laboratory of Heavy Ion Accelerator of Lanzhou.

More information:
Ming-Hao Zhang et al, Possibility of reaching the predicted center of the “island of stability” via the radioactive beam-induced fusion reactions, Nuclear Science and Techniques (2024). DOI: 10.1007/s41365-024-01542-x

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New fusion reactions could lead to long-lasting superheavy nuclei with unique properties (2024, September 9)
retrieved 9 September 2024
from https://phys.org/news/2024-09-fusion-reactions-superheavy-nuclei-unique.html

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How Black and Asian women overcome barriers to career success

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How Black and Asian women overcome barriers to career success


older black woman
Credit: Unsplash/CC0 Public Domain

Black and Asian women are severely underrepresented in senior leadership positions in the UK. The obstacles they face, for example being overlooked or underestimated, often result in a perception that career success is beyond their reach. It’s no surprise then that these women can end up feeling invisible and powerless.

Unlike white women, who face “glass ceilings”, research shows ethnic minority women, who have less support and even fewer opportunities to advance, encounter “concrete ceilings” or “concrete walls,” which are more difficult to break.

These women often find prejudices blocking their path and impeding their progress to senior positions. Unsurprisingly, being constantly overlooked despite being competent can severely damage their leadership aspirations.

So how do these women shield themselves from the frustration and marginalization that comes with the racial and gender prejudice they face? And how do they actually achieve career success?

To understand this, in our recent research we interviewed 50 ethnic minority women in senior leadership positions. Our findings revealed persistent discrimination from early career stages right through to the upper echelons of the workplace.

Early in their careers, women faced discriminatory experiences such as lack of management support, being openly mocked for their aspirations and being overlooked for promotion. They also reported a lack of opportunities for development, progression or networking. And they were often left with the sense that other staff were preferred.

This evolved at later career stages into harsher and more derogatory experiences such as excessive scrutiny, invisibility, isolation, not being supported and being undermined. Sometimes, they were simply dismissed as a “diversity hire.”

Contrary to the belief that once you reach the pinnacle of your career, you’re less likely to experience discrimination and microaggressions, our findings showed that for Black and Asian women in the UK the opposite is true.

Some participants in our study especially felt they had faced more hostility later in their career, with one saying she “really began to feel the heat” when she reached a senior level. Another said the negativity became clearer as she progressed, noting: “there’s definitely a sense of … let’s say, ‘how did you get this position?” It can be quite frustrating that people don’t think you’re senior.”

Rather than enjoying a “shield” from the power they had earned, they felt it opened them up to further scrutiny, discrimination and subtle forms of racism and harassment. These experiences had a negative effect on their health, well-being and career outcomes. They even caused some to leave their job.

Strategies for success

Our study did, however, offer some positives. Through exploring Black and Asian women’s career journeys and pathways, we identified strategies and attributes that enabled them to climb the career ladder. This has contributed to our understanding of Black and Asian women’s agency and the motivation that empowers them as they pursue their career goals.

Particularly, our findings revealed certain cognitive processes such as making strategic career decisions, self-advocacy and resilience, helped these women challenge boundaries, especially in the face of knockbacks.

For these women to be successful, it was important to have leadership aspirations and goals from very early on in their careers. As one participant told us: “It is very important to set yourself a personal goal and work to achieve it … so long as you have your eye on that goal, you pick yourself up and continue, you would achieve it.”

Participants in our study also emphasized the importance of having the confidence to ask and self-advocate. One of our interviewees stressed that Black and Asian women cannot wait to be “offered something on a plate” but should put themselves forward for opportunities when they meet the criteria.

Strategizing also helped participants navigate challenges and excel in leadership roles. As one participant put it: “I decided which rooms I wanted to be in, and I make sure that I’m in rooms which give me something and which nourish me.”

Resilience and emotional intelligence became particularly relevant at late career stages, and this included having strong personal and professional networks. This was because of the increasing experiences of discrimination as they reached the upper levels of their careers.

There are, of course, actions that organizations need to take to support Black and Asian women in progressing in their careers. First, they need to develop an environment that prevents double standards, where Black and Asian women attaining leadership positions is normal and openly accepted.

Second, organizations should look more closely at performance, recognizing Black and Asian women for extra work that they do that is often unacknowledged.

Third, we encourage organizations to create an effective reporting system, which is safe and confidential, so that women can raise their concerns without the fear of backlash.

Finally, accountability is key and employers should have mechanisms to tackle people, systems and processes that are discriminatory.

By exploring the career success stories of these trailblazing participants, we have uncovered suggestions that could improve the representation of ethnic minority women in leadership positions at work. Our research also offers an opportunity for young Black and Asian women to reflect on their own career goals, and chart out strategic routes to achieving them.

More information:
Lilian Otaye‐Ebede et al, Breaking the concrete ceiling: Resources and strategies for career success amongst Black and Asian minority ethnic women leaders, Journal of Occupational and Organizational Psychology (2024). DOI: 10.1111/joop.12520

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The Conversation


This article is republished from The Conversation under a Creative Commons license. Read the original article.The Conversation

Citation:
From challenge to champion: How Black and Asian women overcome barriers to career success (2024, September 9)
retrieved 9 September 2024
from https://phys.org/news/2024-09-champion-black-asian-women-barriers.html

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The iPhone is about to be very different, and potentially better, in Europe—experts explain why

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The iPhone is about to be very different, and potentially better, in Europe—experts explain why


iphone
Credit: Unsplash/CC0 Public Domain

Depending on what side of the Atlantic you’re on, your iPhone will soon be very different.

In Europe, the iPhone is about to open up in big ways. Europeans will be able to download third party app stores beyond Apple’s App Store, including the Epic Games Store (which means “Fortnite” is coming back to the iPhone, for some people at least). They will be able to change default apps, swapping out Apple Pay or iMessage for other non-Apple options. They’ll even be able to leave Safari behind and use other web browsers, like Google Chrome or Mozilla Firefox, if they want.

Why, in Europe, is choice now the name of the game for Apple, a company known for its walled garden of apps and services? It all comes down to European regulators, who have taken a decidedly different approach to regulating Big Tech than their American counterparts.

Rather than taking antitrust cases in piecemeal fashion, like the U.S. Department of Justice has done in the U.S., in 2022, the European Commission implemented a comprehensive suite of regulations called the Digital Markets Act. The DMA is the first of its kind: a broad, far-reaching set of regulations and enforcement tactics aimed at making digital markets more fair and open.

In Apple, the EU has an early test case for how effective these regulations will be. But will it be better for consumers? And will it really change competition in Big Tech?

Christo Wilson, a professor of computer science at Northeastern University, says the changes being required of Apple could be a huge shift, both for users and Apple as a company.

Tech companies offering different versions of their products in different regions is not a new concept. Facebook, for example, has different privacy settings in Europe than in the U.S. But this is one of the first cases of a widely adopted piece of hardware, not software, behaving fundamentally differently between regions.

Wilson says it will be a “technical nightmare” for Apple, but one the company will wade through because of its commitment to a specific business model.

“If the EU really pursues this and puts a lot of effort into enforcement, we could end up with very different iPhones,” Wilson says. “If they end up forcing them to allow third party app stores and apps that are not just from the Apple store, that’s a big deal. That makes their ecosystem a lot more like the Android ecosystem, which is a lot more open.”

Wilson says there is a scenario where European iPhones don’t come preloaded with a browser, payment app, email app or messaging app. Users would “go to the [app] store and make explicit choices.”

All of that runs counter to Apple’s entire business model, a “walled garden” approach that keeps users inside a streamlined, curated and contained ecosystem.

The EU has used choice screens in the past, giving people a chance to choose their default apps when they turn on their device for the first time. That has had some positive effects on competition, but Wilson says in the world of Big Tech it’s not always that simple. Companies like Apple and Google often find ways to push back against regulations.

Wilson says they are also adept at designing their devices and software with dark patterns, tricks used in design that lead users toward doing certain things, like using a specific app or signing up for recurring payments.

Elettra Bietti, an assistant professor of law and computer science at Northeastern, says that is the biggest challenge for regulators when it comes to antitrust and competition law.

“The task of regulators is not just to impose obligations or prohibitions on a company like Apple, but it’s also to constantly monitor that they’re not doing something opaque … [or] using some other mechanism to actually make it really hard for users to access those alternative channels but also for competitors to emerge and succeed against the incumbents,” Bietti says.

One of Apple’s biggest arguments against the DMA regulations is that by opening up its phones to third parties, it will also make them less secure and private. Wilson calls these arguments “fairly disingenuous.” There is more malware in the Android ecosystem, but “it doesn’t mean we’re in a crisis situation,” he says.

“On balance, I think we’re better off in a world where you can sideload [download apps outside of an official app store] on the iPhone and there is freedom,” Wilson says. “If that comes at the expense of a tiny bit more malware, so be it.”

As Apple starts to roll out some of these changes, the biggest question remains how it will affect other parts of the world. Will the U.S., which is in the middle of an antitrust push against Big Tech, follow the example set by the E.U. or will the European iPhone just be an anomaly for Apple and the rest of the world?

In the world of tech and digital regulation, all eyes are on Europe, Bietti says. And while she doesn’t expect U.S. regulators to roll out a comprehensive framework like the DMA any time soon, she has hope that “courts and regulators will look to the European experience and take some inspiration.”

More likely, seeing a more open—and maybe more fun—iPhone in the EU might make American iPhone users realize what they’ve been missing.

“More broadly, once people in this country see what is possible, there may be a lot more outcry here: ‘Why aren’t you protecting our rights and giving us the same freedoms as Europeans? It’s an American company,'” Wilson says.

This story is republished courtesy of Northeastern Global News news.northeastern.edu.

Citation:
The iPhone is about to be very different, and potentially better, in Europe—experts explain why (2024, September 9)
retrieved 9 September 2024
from https://techxplore.com/news/2024-09-iphone-potentially-europe-experts.html

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Pesticides in combination can have unexpected effects on the development of honeybees

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Pesticides in combination can have unexpected effects on the development of honeybees


Pesticides in combination can have unexpected effects on the development of honeybees
Development of honeybees in the laboratory. The larvae received pesticides in their food from the fourth to the ninth day. After the ninth day, the larvae in the bee colony would normally be capped for their pupation; in the laboratory, they were transferred to a new plate. The different stages of development from egg (day 1–3) to round larva (day 4–9), stretched larva (day 10–12) and pupa (day 13–20) to the hatched adult bee (day 21) are clearly visible. Credit: Sarah Manzer / Universität Würzburg

Honeybees are social insects. Their colony only survives as a community, and healthy new generations are very important. It is therefore not surprising that honeybees invest significant care and resources into their offspring: nurse bees feed the young larvae with a food juice made from nectar and pollen which they produce in a gland in their head.

However, pollen, in particular, can contain residues of various insecticides and other pesticides. It is therefore very likely that bee larvae are exposed to a complex mixture of chemicals.

What impact do insecticides authorized in the EU have on the development of honeybees, on their own and in combination with fungicides, especially in concentrations found in the environment? Researchers from the Biocenter of Julius-Maximilians-Universität (JMU) Würzburg in Bavaria, Germany, have investigated this question. Their findings have been published in the journal Environmental Pollution.

The effects of pesticide combinations at low environmentally relevant doses have otherwise been rarely investigated. “As our study shows, this is urgently needed because the agents can interact and reinforce each other’s effects,” explains Ph.D. student Sarah Manzer, first author of the study.

It is also possible that interactions occur at low concentrations only and not at high concentrations, and vice versa. “There are large knowledge gaps which we have now been able to reduce with another piece of the puzzle,” says the JMU researcher.

The experiments: Feeding the bee larvae

The researchers reared honeybees in the laboratory and mixed various pesticides into their food—in concentrations that occur in the environment and in 10 times higher doses.

The JMU team fed the honeybee larvae with the last neonicotinoid still authorized in the EU, acetamiprid—an insecticide used against the oilseed rape beetle and other sucking insects. All other neonicotinoids, which have been previously used, are now banned because they proved to be harmful to bees.

The researchers also fed a mixture of the fungicides boscalid and dimoxystrobin to the honeybee larvae as well as a combination of the neonicotinoid and the two fungicides.

The higher concentration of the neonicotinoid alone led to a significantly higher mortality of the larvae: 90.4% survived in the control group and only 79.8% in the neonicotinoid group. Manzer was also able to determine negative long-term effects: Adult honeybees that had ingested the neonicotinoid as larvae died significantly earlier than the bees in the control group.

They reached a median age of 26 days, compared to 31 days for the control honeybees. In the environmentally relevant concentration, however, the neonicotinoid had no effect on survival rates.

If the larval food contained the two fungicides only, no effect on the mortality of the insects was detected. However, the bees were lighter after hatching from the pupal stage than those in the control group. Further research will have to show whether this is relevant for their further development and behavior.

Neonicotinoid shows complex mixed toxicity with fungicides

The researchers were surprised when they fed the larvae with mixtures of the chemicals. The lower neonicotinoid dosage in combination with the fungicides led to a significantly increased mortality of the adult bees, with a median age of 27 days compared to the age of 31 days for the bees in the control group.

The otherwise harmless amount of neonicotinoid thus becomes dangerous in combination with the fungicides. “This is an alarming finding, as honeybees come into contact with many different pesticides due to their large flight radius,” says Manzer.

And another unexpected effect occurred after feeding with the mixture: The higher neonicotinoid dosage—which had harmful effects on its own—showed no effect on bee mortality when combined with the fungicides.

Solitary wild bees may be more affected

The combined effects found by the researchers could have an impact on the entire bee colony as their next generation could be harmed. In addition, solitary wild bees could be particularly affected due to the more direct pesticide effects, whereas honeybees in their large colonies could buffer the effects of pesticides to a certain extent.

According to the Würzburg scientists, further experiments are crucial to gain an even better understanding of the effects of pesticide mixtures.

More information:
Sarah Manzer et al, The neonicotinoid acetamiprid reduces larval and adult survival in honeybees (Apis mellifera) and interacts with a fungicide mixture, Environmental Pollution (2024). DOI: 10.1016/j.envpol.2024.124643

Citation:
Pesticides in combination can have unexpected effects on the development of honeybees (2024, September 9)
retrieved 9 September 2024
from https://phys.org/news/2024-09-pesticides-combination-unexpected-effects-honeybees.html

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.





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