Friday, June 02, 2023

Ticks prove resilient to extreme temperatures


Peer-Reviewed Publication

WASHINGTON STATE UNIVERSITY

PULLMAN, Wash. — Tick season is here, along with the increased danger of Lyme disease, and it turns out the tiny arachnids are even tougher than scientists previously thought. 

A recent study in Ecological Monographs shows blacklegged ticks (Ixodes scapularis) are actually really good at surviving extreme cold and heat in nature. Previous lab research suggests that even short periods of especially warm or cold conditions should easily kill ticks, but the Washington State University-led analysis reveals this is only the case for larval ticks in the environment.  Instead, nymph and adult ticks weather the hot and cold times with little impact, dying when they apparently run out of energy. The findings could ultimately provide valuable insights into the spread of Lyme disease and other vector-borne pathogens.

“We thought we would see some evidence that if there was like a very dry period, all the ticks might be at a greater risk of dying,” said Jesse Brunner, lead author of the study and an associate professor of biological sciences at WSU. “However, just the larvae were impacted by heat and dry conditions. Cold weather had even less of an impact. Somehow, they hunker down and survive great.” 

Blacklegged ticks are notorious carriers of pathogens responsible for various diseases, including Lyme disease, which is the most common vector-borne illness in North America. Over the years, these ticks have expanded their range significantly across the Eastern United States and Midwest, challenging previous assumptions about their preferred habitats. While one of the culprits is likely climate change, scientists have yet to clearly establish why ticks are abundant in some areas while rare in others.

To address the knowledge gap, the U.S. Department of Defense provided funding to Brunner and a team of collaborators from the Cary Institute of Ecosystem Studies to set up an unprecedently large field study at three military bases located across the U.S. East Coast. By placing more than 9,000 ticks in soil core enclosures and monitoring their survival and development over a three-year period, the researchers were able to collect valuable data on the ticks’ response to climatic conditions.

Their work suggests that while extreme weather conditions don’t seem to have as much of an effect on tick mortality as previously thought, it does make them burn through their food faster. This means that hotter weather could shorten the window of time for ticks to find a host walking by to feed on. This was especially true in the case of tick larvae. The researchers found their median survival times were almost cut in half when exposed to frequent periods of hot and dry weather. 

The researchers also found something else seemed to be happening on a small scale that was killing ticks. Soil core enclosures located just a few meters apart from each other often had surprisingly different rates of tick mortality. In one container the researchers would find 80% of the ticks had survived and in another right next to it none of the ticks had survived. The cause of these significant variations in tick survival is unclear, but the study’s findings suggest the influence of environmental factors such as arthropods or fungi.

The implications of the research are far-reaching, considering the public health impact of tickborne diseases. The study’s findings emphasize the importance of targeting interventions during the larvae stage, when ticks are the most vulnerable. By focusing on this stage of development, researchers hope to develop effective strategies, such as vaccinating host species to resist ticks, that can significantly reduce tick populations and mitigate the risk of disease transmission.

Moving forward, the research team plans to investigate the factors leading to localized tick mortality and delve deeper into the role host species, such as mice, deer and yes, humans, play in tick survival. 

“The ultimate goal is to develop a comprehensive framework that can predict and effectively manage tick populations,” Brunner said. “This could in turn lead to improved public health outcomes.”

In addition to Brunner, the research was conducted by Cary Institute of Ecosystem Studies scientists Shannon LaDeau, Mary Killilea, Elizabeth Valentine, Megan Schierer and Richard Ostfeld. 

Université Laval ranks 14th worldwide in Times Higher Education's Impact ranking

Grant and Award Announcement

UNIVERSITÉ LAVAL

Université Laval ranks 14th worldwide in  Times Higher Education's Impact ranking 

IMAGE: THIS RANKING, CONSIDERED ONE OF THE MOST PRESTIGIOUS IN THE WORLD, ASSESSES THE ABILITY OF HIGHER EDUCATION INSTITUTIONS TO TRANSFORM THE WORLD, BASED ON THE 17 SUSTAINABLE DEVELOPMENT GOALS DEFINED BY THE UNITED NATIONS (UN). view more 

CREDIT: TIMES HIGHER EDUCATION


Université Laval is proud to announce that it ranks 14th among the world's top universities in Times Higher Education's Impact ranking, out of 1591 participating universities. This ranking, considered one of the most prestigious in the world, assesses the ability of higher education institutions to transform the world, based on the 17 sustainable development goals defined by the United Nations (UN). 

Since its initial participation in 2019, Université Laval has made steady progress in this international ranking, now occupying the fourth position among the best-performing universities in Canada and the top spot in Québec. Université Laval continues to demonstrate its commitment to sustainable development.  

"As the world's top-ranked French-language university and a leading representative of Québec and Canada, Université Laval demonstrates that its community is more committed than ever to pursuing the sustainable development goals defined by the UN. We take great pride in contributing to the social and environmental transition of our society through concrete actions in research, teaching and operations," says François Gélineau, Vice-Rector, International Affairs and Sustainable Development. 

Times Higher Education's Impact ranking analyzes university performance in relation to each of the UN's sustainable development goals. Université Laval achieved outstanding results in several key areas: 

  • Goal 2 (Zero Hunger): Université Laval is in a remarkable position, ranking 4th worldwide and 3rd in Canada in the fight against hunger.  
  • Objective 12 (Responsible consumption and production): Université Laval is proud to be ranked 9th worldwide, topping the rankings in Canada and Québec in this crucial area.  
  • Objective 13 (Climate action): Université Laval ranks 9th in the world thanks to its ongoing efforts to maintain its carbon neutrality. 
  • Goal 15 (Life on land): Université Laval's commitment to the preservation of terrestrial life has earned it an enviable position, ranking 7th worldwide and 1st in both Canada and Québec.  
  • Goal 16 (Peace, justice and strong institutions): Université Laval made exceptional progress, rising from 89th in the world to 14th, ranking 3rd in Canada and 2nd in Québec.  
  • Goal 17 (Partnerships for the goals): Université Laval climbed to 30th place worldwide in this important objective. 

Université Laval is committed to continuing its efforts and strengthening its role as a major player in sustainable development, helping to shape a better future for present and future generations. It will continue to collaborate with local, national and international partners to promote the acquisition and sharing of knowledge, innovation, research, creation and implementation of concrete sustainable development solutions. For example, it makes concrete contributions through:  

  • Maintaining carbon neutrality since 2015 and adopting a major energy strategy that will reduce Category 1 and 2 GHG emissions by 70% by 2030, compared with 2006. 
  • The Faculty of Agriculture and Food Sciences’ training in food security and sustainable agriculture for farmers and local food producers (online trainingAgriteliers and Agriculture, Food and Consumer Week). 
  • Participation in cross-sector dialogues on the UN's Sustainable Development Goals (SDGs), including data collection and sharing of best practices at summer schools and seminars.  
  • Responsible food offering on campus (healthy, local, affordable, vegetarian, vegan, sustainably sourced food). 

Times Higher Education is a British organization specializing in global university rankings. The Times Higher Education Impact Ranking goes beyond traditional teaching and research indicators, and instead analyzes universities according to their ability to transform the world. The evaluation criteria are the 17 Sustainable Development Goals as defined by the UN. These goals aim to address the global challenges we face, so that no one is left behind.  

About Université Laval  
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 -30- 

First aid: drones make a difference

Peer-Reviewed Publication

EURAC RESEARCH

Test in the Bletterbach Gorge (South Tyrol, Italy) 

IMAGE: TEST IN THE BLETTERBACH GORGE (SOUTH TYROL, ITALY) view more 

CREDIT: EURAC RESEARCH/ANNELIE BORTOLOTTI


The Eurac Research-led team simulated 24 missions at different locations in the Bletterbach Gorge. Locations were chosen where, according to reports from the South Tyrolean Mountain Rescue, accidents have actually occurred in the past decade. From traumatic injuries such as fractures and dislocations to bruises, the conditions in the gorge are ideal for testing the use of drones in locating and providing first aid to injured people in difficult-to-access terrain. Emergency physician at Eurac Research Michiel van Veelen explains: “It is particularly difficult to locate injured people here. Cell phones don't have reception and the area is difficult to access.”

 

The tests

 

The tests compared response times with and without the drones and at the same time, recorded the rescue teams’ vital functions such as heart and respiratory rates, skin temperature and ECG curves. “The data provides information about the stress everyone is exposed to,” explains Giacomo Strapazzon, director of Eurac Research’s Institute for Mountain Emergency Medicine. ‘We want to know if drone-assisted rescue operations actually give the people involved a greater sense of efficiency and safety.” For this evaluation, rescuers had to fill out a questionnaire before and after the operation.

In addition to the camera, the drones can also carry small packages containing radios, thermal blankets, personal protective equipment and first aid supplies which are delivered near the accident scene.

Giacomo Strapazzon points out the main advantages of using a drone: a fast location of the accident site and the use of telemedicine. In fact, once the package has arrived in the vicinity of the injured person, first responders can already begin rescue thanks to the instructions they receive via radio from 112 personnel.

 

Results

 

The results of the study are now available as a publication in the prestigious American Journal of Emergency Medicine. After evaluation, the following data was discerned  ̶  in drone-supported missions there was a reduction of 30% in the time needed to locate the casualty. The average time needed to begin treatment was also reduced by an average of 30 % thanks to the drones. This was especially true for cases of traumatic injuries and cardiac arrest, where time gained can be critical to survival.

 

In bad weather

 

However, drones are not always infallible, and this was shown by the 4 missions that failed due to technical problems. Because of this, electronic engineers have also been involved in the project with the aim of further developing drone sensor technology to locate victims more quickly in bad or adverse weather conditions.

In a recently approved follow-up project (funded by the Fondazione Cassa di Risparmio’s Fusion Grant), emergency physicians and electrical engineers from Eurac Research are collaborating with the NOI Techpark-based start-up MAVTech to develop a first aid drone for cases of cardiac arrest in mountainous areas. For this purpose, these drones are equipped with a defibrillator that can be easily handled by anyone.

In Stockholm, such drones have already been successfully tested in the city, says Michiel van Veelen.

 “In the case of cardiac arrest, going from life to death is just a matter of minutes, and in South Tyrol there are an average of 50 cardiac arrests a year in hard-to-reach areas,” van Veelen further explains.

All the data (including timing) for several previous cardiac arrest rescue missions which actually occurred in mountainous areas is available and with this information, re-enactments with a drone are taking place for the follow-up project.  In order to equip these airborne rescue technologies for all weather conditions, the MAVTech company drones were exposed to extreme conditions in the terraXcube and adapted accordingly, making it possible for them to be used even in adverse weather conditions in the future.

Researchers use autonomous technologies to make mines safer

Grant and Award Announcement

VIRGINIA TECH

Mine 

IMAGE: VIRGINIA TECH RESEARCHER RICHARD BISHOP CONTINUES TO DEVELOP AUTONOMOUS TECHNOLOGIES TO ASSESS AND PREDICT THE SAFETY OF UNDERGROUND MINES. THIS WORK ALSO PROVIDES OPPORTUNITIES FOR MINING AND MINERALS ENGINEERING STUDENTS TO GAIN HANDS-ON EXPERIENCE IN NEW TECHNOLOGIES. PHOTO BY RICHARD BISHOP FOR VIRGINIA TECH. view more 

CREDIT: VIRGINIA TECH

How do you use drones and robots to make underground mining less risky for workers?

Virginia Tech researcher Richard Bishop and his West Virginia University collaborators are working to answer this question. A recent two-year, $569,149 Alpha Foundation grant will allow the team to study ways to use autonomous drones to predict and prevent roof collapses underground.

It’s urgent work. Since 2006, about 40 percent of deaths in underground stone mines in the U.S. have been linked to collapsed roofs and rock pillars. In fact, four major collapses have occurred in older sections of mines since 2020. What’s more, there exists no definitive way to predict these structural failures.

“We hope that by bringing our research together, we can make faster progress in this critically important area of mine safety,” Bishop said.

The project aims to develop a database of mine layouts, rock mass characteristics, and high-resolution 3D maps of stone mine pillars and roofs; refine the techniques and equipment used to gather similar data; and use the database to develop guidelines for recognizing hazards that lead to pillar and roof collapses.

Bishop, who is an alumnus of the Department of Mining and Minerals Engineering, previously worked on a research project funded by the National Institute for Occupational Safety and Health that used laser scanning and a photographic technique known as photogrammetry to generate 3D maps to help study the structural integrity of underground stone mines. In that project, Bishop demonstrated the effectiveness of using various sensors to fly drones in GPS-denied environments and onboard LED lighting systems, built in-house, to allow drones in the absolute darkness of an underground mine to capture high-quality digital photos. Those photos were used to calculate critical measurements to evaluate the safety of mine structures.

West Virginia University researchers have developed a robotic mapping system that uses autonomous ground and aerial vehicles to map underground mines. Bringing these two approaches together could develop better ways to inspect mine structures and predict safety threats.

Drones have become an essential part of surface mine operations to boost safety and efficiency. Bishop sees a day when that will be true for underground operations, too, and that could have broad impacts on safety and economic growth. The global stone mining and quarrying market alone is expected to grow from about $8 billion in 2020 to more than $11 billion by 2025, Business Wire recently reported.

That growth also provides opportunities for today’s mining students that the College of Engineering wants to help them seize.

“All our mining engineering students now and in the future will have opportunities to learn and practice using autonomous technologies for a range of applications,” interim department head Erik Westman said. “We currently have a near 100 percent job placement rate for our graduates. We want to ensure our degree program stays on the cutting edge of mining and remains a great financial investment for students and their families.”

Westman oversees the department’s new Center for Autonomous Mining, aka VT Mock Mine, in the recently remodeled Holden Hall. The first-of-its-kind lab-scale facility features three open pits that can be filled with various minerals and space soil simulants. There, students build and operate autonomous digging and hauling vehicles for classes and competition teams. Bishop also teaches students to build and fly small drones in the facility, and Westman plans to develop research initiatives that would include industry partners.

“Our undergraduate program is focusing on providing training in data analytics and programming to help our graduates and industry partners leverage the financial and environmental efficiencies possible now and in the future,” Westman said.

This focus on education and hands-on experience with autonomous technologies will not only make mining engineering graduates more sought after by employers, it will give them the tools to make important contributions to the safety and sustainability of mining worldwide.


Autonomous drones are changing the mine mapping game

Moosa Imran| May 30, 2023 | 
 Canadian Mining Journal Staff

For Exyn Tech, the number one thing in drone design is safety. The ExynAero EA6 is a fully autonomous drone, able to map existing stops and/or drifts. It does not require any sort of previous infrastructure, GPS, tethers, Wi-Fi, or even a pilot.

When mapping, the ExynAero EA6 gives users 50 million to 60 million points of measurement. Credit: Exyn Tech

“We no longer need to send miners to the face,” said Raffi Jabrayan, VP business development and commercial sales. “With our machines, you could stand 30, 40, or 50 metres away from an open stope, under a fully supported area, give it its mission and it is able to go and get the mission done.”

Jabrayan said that among its other attributes, efficiency was key, claiming that the drone can complete research within a mine that would normally take hours, within a matter of minutes.

On top of that, the EA6 is changing the game in terms of map accuracy.

“Your traditional measuring tools used to give you 30,000 to 40,000 points. (EA6) gives you 50 million to 60 million points. In layman’s terms; it is giving you a
better-quality map, which is giving you more accurate volumetric calculations, which then allows you to obviously plan better,” he said.

The EA6 is the third generation of autonomous drones from Exyn. The company was founded in 2014 by Nader Elm and Vijay Kumar as a spin off, out of the University of Pennsylvania’s General Robotics, Automation, Sensing and Perception (GRASP) lab.

Jabrayan said that bringing major mining corporations into the development process was vital for the development of the EA6, as it was for previous models. Products are also rigorously tested in controlled environments before they hit the market.

According to Jabrayan, reviews for the item have been largely positive and over 150 units are out in the marketplace right now.

“It is very difficult for me to say, no, we do not want something that’s going to make us more efficient, or we do not want to be safer, or we don’t want more accuracy. So, the product usually sells itself,” he added.

Jabrayan said the next step in the drone’s evolution is to optimize functionality. Be that longer battery life, more sensors, an increased ability to detect gases and eventually making the drone suitable for indoor and outdoor flight, as opposed to its current setting which is exclusively for underground.

“Before the end of the year, this unit will be able to fly indoor and outdoor at the same time. It can start indoors and finish outdoors or vice versa, which opens a whole bunch of new use cases,” Jabrayan said.

Exyn Aero drone makes accurate maps of historic mines

Exyn Technologies is known for pioneering AI autonomous aerial robot systems for complex, GPS-denied environments. 


By Canadian Mining Journal Staff May 31, 2023 


Safely and quickly map underground openings with the Exyn Aero autonomous drone. Exyn Technologies photo

Exyn Technologies is known for pioneering AI autonomous aerial robot systems for complex, GPS-denied environments. Geologists at Ascot Resources have used the Exyn Aero fully autonomous drone to map a former underground mine that was in production from 1938 to 1941. The result was an accurate map delivered quickly and safely.

In the past, human surveying teams have been sent into old mines such as the Big Missouri deposit that Ascot used Exyn technology to survey. Not only is this human powered methodology inefficient its also unsafe and tends to result in slow data and mistakes in mapping of capabilities.

The Big Missouri deposit is part of the former Premier gold mine that Ascot is seeking to reopen. The first gold pour is scheduled for early 2024. The mine site is 25 km from the town of Stewart, B.C.

The Exyn Aero fully autonomous drone can map a mine such as this in a matter of minutes thanks to LiDAR based mapping technology. This data can allow companies like Ascot to quickly create reports of existing mine openings that were previously impossible.

Request a demonstration of any Exyn technology at www.Exyn.com.

ERC Consolidator Grant for geoscientist Daniel Herwartz

Grant and Award Announcement

UNIVERSITY OF COLOGNE

Dr Daniel Herwartz from the University of Cologne’s Institute of Geology and Mineralogy has been awarded the coveted Consolidator Grant by the European Research Council (ERC). Herwartz will receive a total of 2 million euros in funding over a period of 5 years. ERC Consolidator Grants are awarded to excellent early-career researchers. In his project “The kinetic oxygen cycle in chemical sediments” (KinO), which has been selected for funding, Herwartz mainly examines limestones that have formed in sea water.

For more than 70 years, researchers have been able to trace back ocean temperatures in Earth’s history based on the isotopic composition of oxygen (16O and 18O) in limestone. This method works well for certain samples from recent Earth history. However, temperature reconstructions for over 3-billion-year-old samples indicate oceans hotter than 70°C, and are highly controversial. Herwartz additionally measures the third oxygen isotope 17O to check whether the calculated temperatures are accurate or not. As part of the funded project, he wants to explore the formation conditions of limestones in more detail to improve the temperature reconstructions. “The project focuses on examining temperature fluctuations associated with mass extinction. This provides a better understanding of how ecosystems have responded to natural and much slower climate fluctuations than today,” Herwartz said.

The European Research Council (ERC) is the funding organization of the European Union. Each year, the council selects research proposals from scholars and scientists of all nationalities whose projects are to be carried out in Europe. ERC Consolidator Grants are awarded to researchers seven to twelve years after completion of their doctorate. The research must be conducted in a public or private research institution in an EU Member State or associated country. Last year, Herwartz already received a prestigious grant from the German Research Foundation (Heisenberg). In that project, he also uses the oxygen isotope 17O, among other things, to better understand the phosphate cycle in soils.

Tiny video capsule shows promise as an alternative to endoscopy

Peer-Reviewed Publication

GEORGE WASHINGTON UNIVERSITY

NaviCam® 

IMAGE: ANX ROBOTICA'S CAPSULE ENDOSCOPY SYSTEM: NAVICAM® view more 

CREDIT: ANX ROBOTICA


WASHINGTON (June 1, 2023)—While ingestible video capsule endoscopes have been around for many years, the capsules have been limited by the fact that they could not be controlled by physicians. They moved passively, driven only by gravity and the natural movement of the body.  Now, according to a first-of-its-kind research study at George Washington University, physicians can remotely drive a miniature video capsule to all regions of the stomach to visualize and photograph potential problem areas. The new technology uses an external magnet and hand-held video game style joysticks to move the capsule in three-dimensions in the stomach. This new technology comes closer to the capabilities of a traditional tube-based endoscopy.  

“A traditional endoscopy is an invasive procedure for patients, not to mention it is costly due to the need for anesthesia and time off work,” Andrew Meltzer, a professor of Emergency Medicine at the GW School of Medicine & Health Sciences, said. “If larger studies can prove this method is sufficiently sensitive to detect high-risk lesions, magnetically controlled capsules could be used as a quick and easy way to screen for health problems in the upper GI tract such as ulcers or stomach cancer.”

More than 7 million traditional endoscopies of the stomach and upper part of the intestine are performed every year in the United States to help doctors investigate and treat stomach pain, nausea, bleeding and other symptoms of disease, including cancer. Despite the benefits of traditional endoscopies, studies suggest some patients have trouble accessing the procedure. 

In fact, Meltzer got interested in the magnetically controlled capsule endoscopy after seeing patients in the emergency room with stomach pain or suspected upper GI bleeding who faced barriers to getting a traditional endoscopy as an outpatient.

“I would have patients who came to the ER with concerns for a bleeding ulcer and, even if they were clinically stable, I would have no way to evaluate them without admitting them to the hospital for an endoscopy. We could not do an endoscopy in the ER and many patients faced unacceptable barriers to getting an outpatient endoscopy, a crucial diagnostic tool to preventing life-threatening hemorrhage,” Meltzer said. “To help address this problem, I started looking for less invasive ways to visualize the upper gastrointestinal tract for patients with suspected internal bleeding.”

The study is the first to test magnetically controlled capsule endoscopy in the United States. For  patients who come to the ER or a doctor’s office with severe stomach pain, the ability to swallow a capsule and get a diagnosis on the spot – without a second appointment for a traditional endoscopy – is a real plus, not to mention potentially life-saving, says Meltzer. An external magnet allows the capsule to be painlessly driven to visualize all anatomic areas of the stomach and record video and photograph any possible bleeding, inflammatory or malignant lesions. 

While using the joystick requires additional time and training, software is being developed that will use artificial intelligence to self-drive the capsule to all parts of the stomach with a push of the button and record any potential risky abnormalities. That would make it easier to use the system as a diagnostic tool or screening test. In addition, the videos can be easily transmitted for off-site review if a gastroenterologist is not on-site to over-read the images. 

Meltzer and colleagues conducted a study of 40 patients at a physician office building using the magnetically controlled capsule endoscopy. They found that the doctor could direct the capsule to all major parts of the stomach with a 95 percent rate of visualization. Capsules were driven by the ER physician and then the study reports were reviewed by an attending gastroenterologist who was physically off-site. 

To see how the new method compared with a traditional endoscopy, participants in the study also received a follow up endoscopy. No high-risk lesions were missed with the new method and 80 percent of the patients preferred the capsule method to the traditional endoscopy. The team found no safety problems associated with the new method.

Yet, Meltzer cautions that the study is a pilot and a much bigger trial with more patients must be conducted to make sure the method does not miss important lesions and can be used in place of an endoscopy.  A major limitation of the capsule includes the inability to perform biopsies of lesions that are detected. 

The study, “Magnetically Controlled Capsule for Assessment of the Gastric Mucosa in Symptomatic Patients (MAGNET): A Prospective, Single-Arm, Single-Center, Comparative Study,” was published (insert date) in iGIE, the open-access, online journal of the American Society for Gastrointestinal Endoscopy.

The medical technology company AnX Robotica funded the research and  is the creator of the capsule endoscopy system used in the study, called NaviCam®. 

-GW-

Industrially applied and relevant transformations of 1,3-butadiene using homogeneous catalysts

Peer-Reviewed Publication

INDUSTRIAL CHEMISTRY & MATERIALS

Industrially Applied and Relevant Transformations of 1,3-Butadiene 

IMAGE: THE PRACTISE OF 1,3-BUTADIENE AS A COMPARABLY CHEAP AND ABUNDANT RAW MATERIAL TO HARVEST FINE AND BULK CHEMICALS IS SUMMARIZED IN DETAIL view more 

CREDIT: MATTHIAS BELLER, LEIBNIZ INSTITUTE FOR CATALYSIS E.V. (LIKAT)


The use of 1,3-butadiene as a cheap and abundant raw material for new applications has attracted more interest in recent decades, specifically in the chemical industry. The review covers several important homogeneously catalyzed processes and technologies that are currently used or have the potential to produce fine and bulk chemicals from 1,3-butadiene. This article focuses specifically on the application of homogeneous catalysts and presents representative examples for the readers. For example, palladium-catalyzed telomerization of 1,3-butadiene offers versatile platform chemicals for the production of 1-octene, 1-octanol, and higher-value EVP lactones through the participation of diverse nucleophiles. Meanwhile, efficient di-functionalizations of 1,3-butadiene provide a straightforward access for the synthesis of various polymer precursors, including adiponitrile, adipaldehyde, and adipic diesters.

The development of efficient catalytic systems plays a key role in enabling atom-economic and selective processes. The review highlights that there are still many potential applications for 1,3-butadiene that are not currently being explored in the chemical industry. Overall, this review provides valuable information on industrially applied and relevant transformations of 1,3-butadiene using homogeneous catalysts that can be useful to researchers and professionals in the field. Beller et al. published their review on 12 Apr 2023 in Industrial Chemistry & Materials.

“The motivation behind this review was to provide a comprehensive overview of the current state-of-the-art in using 1,3-butadiene as a raw material for chemical production. This compound is abundant and relatively cheap, making it an attractive option for producing fine and bulk chemicals. However, there are still many challenges associated with using 1,3-butadiene as a feedstock, including its high reactivity and potential for unwanted side reactions.” said corresponding author Professor Matthias Beller, Leibniz Institute for Catalysis e.V. (LIKAT). “In this review, we cover several important homogeneously catalyzed processes that are currently used or have the potential to produce valuable chemicals from 1,3-butadiene. These include palladium-catalyzed telomerization, di-functionalization, and other reactions that can produce various chemicals and polymer precursors.”

“We emphasize the importance of developing efficient catalytic systems that can enable atom-economic and selective processes. We provide examples of how different catalysts can be used to achieve specific chemical transformations with high yields and selectivity. The review also highlights some potential applications for 1,3-butadiene that are not currently being explored in the chemical industry.”

“Efficient catalytic systems are critical for enabling selective and sustainable processes when using 1,3-butadiene as a feedstock. Advances in catalyst design have led to significant improvements in yield and selectivity for many chemical transformations involving this compound.” When discussing the future of utilizing 1,3-butadiene as a raw material for chemical production, Professor Matthias Beller stated, "I firmly believe that there is still a great deal of potential for exploring new applications of 1,3-butadiene within the chemical industry. It could, for instance, serve as a valuable feedstock for producing renewable chemicals or as a starting material for synthesizing novel materials with distinctive properties. Nevertheless, it will be crucial to continue advancing efficient catalytic systems and sustainable processes to surmount the obstacles linked with using this compound as a feedstock."


Industrial Chemistry & Materials is a peer-reviewed interdisciplinary academic journal published by Royal Society of Chemistry (RSC) with APCs currently waived. Icm publishes significant innovative research and major technological breakthroughs in all aspects of industrial chemistry and materials, especially the important innovation of the low-carbon chemical industry, energy, and functional materials.

FEMINIST ECONOMICS

Smallest agri-SMEs in Africa owner-managed by women bore the brunt of COVID-19, new CABI study reveals

The smallest agri-SMEs in Africa owner-managed by women bore the brunt of the COVID-19 pandemic, according to new research led by a team of CABI scientists and published in the journal CABI Agriculture & Bioscience

Peer-Reviewed Publication

CABI

The smallest agri-SMEs in Africa owner-managed by women bore the brunt of the COVID-19 pandemic, according to new research led by a team of CABI scientists and published in the journal CABI Agriculture & Bioscience.

The researchers studied data from 119 agri-SMEs – ranging in size from sole proprietorships with one employee to those employing up to 100 people – across six different value chains in Ethiopia, Ghana, Malawi, Nigeria, Tanzania and Zimbabwe.

Value chains that formed part of the survey included – in order of aforementioned countries – rice, oil palm and cocoa, groundnuts, maize, cocoa and rice, rice and sunflower and maize.

Scientists from CABI’s regional centre for Africa in Nairobi, Kenya, and its centre for West Africa in Accra, Ghana, found that while all agri-SMEs were negatively affected by COVID-19-associated restrictions, the size of the firm and gender of the owner-managers resulted in different impacts.

The smallest agri-SMEs, mainly owner-managed by women, were more likely to experience disruptions in marketing their goods and maintaining their labour supply.

Larger agri-SMEs, however, made changes to their business operations to comply with government guidelines during the pandemic and made investments to manage their labour supply – therefore, sustaining their business operations.

In terms of changes in business operations by agri-SMEs due to COVID-19 restrictions, 72% were affected by changes to market access and nearly 70% by health and safety changes. This included the wearing of face masks and hand washing. Labour supply changes affected 40% while 22% were impacted by financing and just over 10% made changes to how they package their products.

Furthermore, modelling results show that financing prior to the pandemic, engaging in primary agricultural production and being further from urban centres, significantly influenced the likelihood of a firm incurring business losses.

Dr Mariam Kadzamira, Senior Researcher, Agribusiness at CABI and lead author of the research, said, “Our findings necessitate engendered multi-faceted agri-SME support packages that are tailored for smaller-sized agri-SMEs.

“Any such support package should include support for agri-SMEs to develop sustainable marketing strategies and help them secure flexible financing that considers payment deferrals and debt moratorium during bona fide market shocks such as the COVID-19 pandemic.”

The study highlights that while sub-Saharan Africa has the highest female entrepreneurship rate globally, these women-led enterprises are more likely to be smaller, informal, and less profitable, with less growth potential than those operated by men.

A key recommendation from the research is that public and private sector entities facilitating entrepreneurship development should establish multi-faceted support packages that will cushion agri-SMEs in the aftermath of the COVID-19 pandemic to allow them to “bounce back.”

Dr Victor Clottey, co-author and Regional Representative, West Africa at CABI, said, “Support should be tailored for smaller-sized agri-SMEs as they are more vulnerable to shocks arising in the market.

“In addition, there is a need for innovative gendered support packages, as most enterprise owner-managed by women are likely to be smaller and hence more vulnerable.

“Any support package put in place should have a work package to support SMEs with developing sustainable marketing strategies and securing flexible financing that considers payment deferrals and debt moratorium for agri-SMEs in the event of a bona fide economic and/or market shock.”

The scientists add that smaller-sized SMEs should be supported not only with financing but also with the capacity to diversify their business operations and income streams to enhance their resilience in the event of market and economic shocks such as the COVID-19 pandemic.

 

Additional information

Main image: Africa’s agricultural SMEs face many constraints to their growth and sustainability which were compounded by the COVID-19 pandemic (Credit: Pixabay).

Full paper reference

Kadzamira, M.A.T.J., Ogunmodede, A., Duah, S. et al. African agri-entrepreneurship in the face of the COVID-19 pandemic. CABI Agric Biosci 4, 16 (2023). https://doi.org/10.1186/s43170-023-00157-3

The paper can be read open access here: https://cabiagbio.biomedcentral.com/articles/10.1186/s43170-023-00157-3

Funding acknowledgement

This study was funded by CABIs Development Fund (CDF). CABI is an international intergovernmental organization with core financial support from member countries (and lead agencies), including the United Kingdom (FCDO), China (Chinese Ministry of Agriculture and Rural Affairs), Australia (Australian Centre for International Agricultural Research), Canada (Agriculture and Agri-Food Canada), the Netherlands (DGIS) and Switzerland (Swiss Agency for Development and Cooperation).