PRESS-NEWS.org - Press Release Distribution
PRESS RELEASES DISTRIBUTION

Combining data types refines grasp of French Canadian ancestry in Quebec, revealing how local topographies influenced relatedness, and more

2023-05-25
(Press-News.org) Combining a comprehensive dataset – including marriage documents – compiled from more than 4 million Catholic parish records with genotype data for more than 22,000 French and French Canadian individuals, researchers have conducted a novel analysis of French Canadian ancestry in Quebec, Canada, since the 17th Century. While most other population genetic models provide only coarse representations of a region’s real-world ancestry, this new approach reveals detailed insights into historic European colonization, migration, and settlement patterns, reflecting intricate French Canadian population structures within geographic constraints. What’s more, using the combined datasets, Anderson-Trocmé et al. developed a freely accessible simulated whole-genome sequence dataset with spatiotemporal metadata for more than 1.4 million individuals, enabling future researchers to investigate Quebec’s population genetics at an unprecedented resolution. The migration and dispersal of humans across geographic landscapes can be reconstructed through population genomic analyses. However, for most models, discerning the relationship between spatial migrations and continuous genetic variation within a given population has been difficult and occasionally misleading. Luke Anderson-Trocmé and colleagues leveraged a population-scale spatial pedigree compiled from 4 million historical parish records from across Quebec and genotype data from 2276 French and 20,451 French Canadian individuals to finely model French Canadian ancestry – and how it was shaped by the region’s geographic features. Anderson-Trocmé et al. found that most individuals in Quebec derive ancestry from ~8500 settlers who migrated from France in the 17th and 18th centuries and that the first 2600 French colonizers contributed two-thirds of the French Canadian gene pool. What’s more, the authors show that geographic features, particularly its river networks, considerably shaped Quebec’s population structure, defining major axes of migration and genetic relatedness.

END


ELSE PRESS RELEASES FROM THIS DATE:

International pandemic governance need not prioritize compliance and sanctions

2023-05-25
In a Policy Forum, Mark Eccleston-Turner and colleagues argue that upcoming negotiations surrounding the World Health Organization (WHO) international pandemic treaty need not be overly focused on formal compliance mechanisms and sanctions. Instead, Eccleston-Turner et al. suggest that any efforts to ensure compliance should be part of broader efforts to ensure effective and equitable implementation across all member states. Member states of the World Health Organization (WHO) are preparing for ambitious ...

River erosion can shape fish evolution, study suggests

River erosion can shape fish evolution, study suggests
2023-05-25
If we could rewind the tape of species evolution around the world and play it forward over hundreds of millions of years to the present day, we would see biodiversity clustering around regions of tectonic turmoil. Tectonically active regions such as the Himalayan and Andean mountains are especially rich in flora and fauna due to their shifting landscapes, which act to divide and diversify species over time.  But biodiversity can also flourish in some geologically quieter regions, where tectonics hasn’t shaken up the land for millennia. The Appalachian Mountains are a prime example: The range ...

River erosion drives fish biodiversity in the Appalachians

2023-05-25
New Haven, Conn. — The gradual erosion of layers of rock by rivers flowing through the Appalachian Mountains generates biodiversity of freshwater fish species, suggests a new Yale-led study that offers insight into the causes of species richness in the ancient mountain range. Researchers have previously associated high biodiversity in mountain ranges, including the Andes and Himalaya, with tectonic uplift — the shifting of plates in the Earth’s crust that forms mountains, plateaus, and other geologic structures — triggering environmental changes that create conditions ripe for species diversification. ...

Researchers at the Faculty of Physics of the University of Warsaw have created a new, highly efficient converter of quantum information carriers

Researchers at the Faculty of Physics of the University of Warsaw have created a new, highly efficient converter of quantum information carriers
2023-05-25
Researchers at the University of Warsaw's Faculty of Physics have developed a new, highly efficient technique that makes quantum information transmission dozens of times faster. The results of the research, published in the prestigious journal Nature Photonics, may in the near future contribute to the development of superfast quantum Internet connections. Light is a key carrier of information. It enables high-speed data transmission around the world via fiber-optic telecommunication networks. This information-carrying capability can be extended to transmitting quantum information by encoding ...

Making the structure of 'fire ice' with nanoparticles

2023-05-25
Images  //  Video  Cage structures made with nanoparticles could be a route toward making organized nanostructures with mixed materials, and researchers at the University of Michigan have shown how to achieve this through computer simulations.   The finding could open new avenues for photonic materials that manipulate light in ways that natural crystals can't. It also showcased an unusual effect that the team is calling entropy compartmentalization.   "We are developing new ways to structure ...

Large study provides scientists with deeper insight into long COVID symptoms

2023-05-25
Large study provides scientists with deeper insight into long COVID symptoms NIH-funded research effort identifies most common symptoms, potential subgroups, and initial symptom-based scoring system – with aim of improving future diagnostics and treatment Initial findings from a study of nearly 10,000 Americans, many of whom had COVID-19, have uncovered new details about long COVID, the post-infection set of conditions that can affect nearly every tissue and organ in the body. Clinical symptoms can vary and include fatigue, brain fog, and dizziness, and last for months or years after ...

Intravenous plus periarticular corticosteroids improve rehabilitation measures after knee replacement

2023-05-25
May 25, 2023 – For patients undergoing total knee arthroplasty (TKA), a combination of intravenous and periarticular corticosteroids does not improve pain control – but, may improve key indicators of functional recovery in the days after surgery, reports a trial in The Journal of Bone & Joint Surgery. The journal is published in the Lippincott portfolio in partnership with Wolters Kluwer. Intravenous (IV) plus periarticular (PA) steroids "yielded more significant improvements in the rehabilitation parameters," ...

Microneedling plus cupping may aid skin rejuvenation

2023-05-25
May 25, 2023 – A combination of emerging and alternative techniques – microneedling to induce collagen and cupping to increase tissue perfusion – may have a synergistic effect in producing skin rejuvenation, according to an experimental study in the June issue of Plastic and Reconstructive Surgery®, the official medical journal of the American Society of Plastic Surgeons (ASPS). The journal is published in the Lippincott portfolio by Wolters Kluwer. "Cupping therapy can be added to microneedling therapy and used to increase certain desired effects on skin," comments lead author Burak Pasinlioğlu, MD, of Kecioren Research ...

Scientists target human stomach cells for diabetes therapy

Scientists target human stomach cells for diabetes therapy
2023-05-25
Stem cells from the human stomach can be converted into cells that secrete insulin in response to rising blood sugar levels, offering a promising approach to treating diabetes, according to a preclinical study from researchers at Weill Cornell Medicine. In the study, which appeared April 27 in Nature Cell Biology, the researchers showed that they could take stem cells obtained from human stomach tissue and reprogram them directly—with strikingly high efficiency—into cells that closely resemble pancreatic insulin-secreting cells known as beta cells. Transplants of small groups of these cells reversed disease signs in a mouse model of diabetes. “This ...

Sage’s 10-Year Impact Awards recognize research with long-term influence

2023-05-25
For the fourth year, Sage has awarded 10-Year Impact Awards to three research articles that have had a lasting influence over the past decade. The awards are given to the authors of three papers published in Sage Journals in 2012 that have received the most citations in the 10 years since than all other studies published in the same year.   The three winning papers are:  “The Nature and Organization of Individual Differences in Executive Functions: Four General Conclusions” by Akira Miyake and Naomi P. Friedman in Current Directions ...

LAST 30 PRESS RELEASES:

Altering cancer treatment dosing could reduce climate impact, study finds

The secret sex life of coral revealed

New deep learning model is ‘game changer’ for measuring embryo development

Smarter foragers do not forage smarter

A unified account of Darwinism’s varieties

Marketers can manage 'feature creep'

Intermittent fasting shows promise in improving gut health, weight management

Scientists identify gene that could lead to resilient ‘pixie’ corn

Utilizing medical assistants to manage patient portal messages shown to support practice and physician efficiency

Study shows clinic continuity associated with reduced hospital and emergency visits

Recognizing the range of experiences among individuals of Latino, Hispanic, and/or Spanish origin is an essential step toward health equity

study reveals decline in reported medicare outpatient procedures by family physicians amid an aging population

COVID-19 pandemic leads to drop in breast cancer screenings, especially among older and racial minority women

Translating the Surgeon General’s framework on social isolation and loneliness to actionable steps in primary care

Point/counterpoint: Is prediabetes overdiagnosed?

Primary care clinics can help low-income families receive nutritional support benefits

The wall of evidence for continuity of care

Parents of children with serious illness from Somali, Hmong, and Latin American communities desire better communication and support in pediatric health care

Primary care can improve hygienic practices while reducing waste

HKUST researchers enhance performance of eco-friendly cooling applications by developing sustainable strategy to manipulate interfacial heat transfer

Variations in medical assistant to primary care clinician staffing ratios may reflect differences in practice ownership and organizational culture

Better disciplinary structures in schools can help reduce hate speech directed against Asian American students

Bringing back an ancient bird

Wistar research identifies mechanisms for selective multiple sclerosis treatment strategy

Fatherhood’s hidden heart health toll

The importance of integrated therapies on cancer: Silibinin, an old and new molecule

Texas A&M-led team creates first global map of seafloor biodiversity activity

Light therapy increases brain connectivity following injury

Power imbalance in health care reveals impact of race and role on team dynamics and DEI efforts

NRG Oncology appoints new vice-chairs for their patient advocate committee

[Press-News.org] Combining data types refines grasp of French Canadian ancestry in Quebec, revealing how local topographies influenced relatedness, and more