11,149 results match your criteria: "Panama; Gorgas Memorial Institute for Health Research[Affiliation]"

Antimicrobial mechanisms and antifungal activity of compounds generated by banana rhizosphere Gxun-2 against f. sp. .

Front Microbiol

September 2024

Guangxi Key Laboratory for Polysaccharide Materials and Modifications, School of Marine Sciences and Biotechnology, Guangxi Minzu University, Nanning, China.

Introduction: wilt of banana, also recognized as Panama disease, is caused by the soil-borne fungus f. sp. tropical race 4 (FOC TR4).

View Article and Find Full Text PDF
Article Synopsis
  • * The research involved standard bioassays to assess resistance against various insecticides, along with biochemical tests to identify metabolic resistance mechanisms and real-time PCR for detecting specific genetic mutations (Kdr).
  • * The findings revealed significant resistance levels in multiple strains of Aedes mosquitoes, with notable variation in enzyme activity related to resistance, and identified the presence of Kdr mutations in several populations, indicating a pressing public health challenge.
View Article and Find Full Text PDF

Exposure to bisphenols, parabens, and benzophenones in colostrum breast milk of Panamanian women: A pilot study from the PA-MAMI cohort.

Sci Total Environ

December 2024

Instituto de Investigación Biosanitaria de Granada (ibs. GRANADA), E-18012 Granada. Spain. Electronic address:

Article Synopsis
  • This study investigates the presence of non-persistent endocrine-disrupting chemicals (EDCs), including bisphenols, parabens, and benzophenones, in the colostrum of Panamanian mothers to understand their breastfeeding influences.
  • Results showed that all colostrum samples contained multiple EDCs, with bisphenol A (BPA) being the most common at a detection rate of 91.7%, highlighting potential environmental exposures.
  • The analysis also indicated that factors such as maternal residence, diet, and personal care products influenced EDC concentrations, suggesting the need for preventive measures to ensure safe breastfeeding practices.
View Article and Find Full Text PDF

Modulating quantum tunnelling of magnetization in Dy isotopologue dimers.

Dalton Trans

October 2024

Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, D-76344, Eggenstein-Leopoldshafen, Germany.

Qudits are anticipated to streamline quantum computation by minimizing iterations, lowering error rates, and facilitating error correction. It has been shown that Dy(III)-based molecular systems can act as qudits with expanded Hilbert spaces. Achieving a robust intramolecular interaction, whether exchange or dipolar, is crucial for spanning the Hilbert space of qudits; hence, short Dy(III)⋯Dy(III) distances are required.

View Article and Find Full Text PDF
Article Synopsis
  • Canopy gaps play an important role in supporting forest tree diversity, but studies often show mixed results regarding their impact.
  • Our research in a tropical forest in Panama revealed that while individual gaps have slightly higher sapling richness and density initially, these differences become indistinguishable over time.
  • However, when looking at multiple gaps collectively, there were significant increases in species richness and the presence of gap-specialized species, suggesting that gaps are crucial for enhancing overall tree diversity in forests.
View Article and Find Full Text PDF

Nudibranch molluscs Coryphella are widely distributed and species-rich gastropod group lacking fossil record and displaying a complex distribution across both Southern and Northern hemispheres. In this paper we provide a detailed review of the morphology, ecology, and distribution of Coryphella, estimation of divergence times between species, an ancestral area reconstruction, and a population analysis of widely distributed trans-Arctic species Coryphella verrucosa to investigate the evolution, phylogeographic patterns and reconstruct possible historical routes of oceanic dispersal. The inclusion of a larger sample size and five molecular markers has revealed a complex evolutionary history of Coryphella, shaped by transgression, vicariance, and dietary shifts, and overall driven by the pervasive effect of glacial cycles.

View Article and Find Full Text PDF

Aridity drives the response of soil total and particulate organic carbon to drought in temperate grasslands and shrublands.

Sci Adv

October 2024

Institute of Grassland Science, Key Laboratory of Vegetation Ecology of the Ministry of Education, Jilin Songnen Grassland Ecosystem National Observation and Research Station, Northeast Normal University, Changchun 130024, China.

Article Synopsis
  • Drought events are becoming more common in grasslands and shrublands, affecting soil organic carbon (SOC), which includes different forms like particulate (POC) and mineral-associated organic carbon (MAOC).
  • A global study over 19 sites revealed that in wetter areas (aridity index > 0.65), extreme drought led to a significant decrease in SOC (7.9%) and POC (15.9%), but MAOC levels remained unchanged.
  • In drier regions (aridity index < 0.65), drought did not significantly affect any type of soil organic carbon, indicating that the impact of drought on SOC is influenced by environmental aridity and rainfall variability.
View Article and Find Full Text PDF

Animals in restoration to achieve climate biodiversity targets.

Trends Ecol Evol

November 2024

Department of Environmental Systems Science, ETH, Zürich, Switzerland.

Article Synopsis
  • Animals can help fix our environment and save nature at the same time.
  • Around 25% of forest restoration projects can get better with the help of animals.
  • Half of these projects need us to take steps to make things better.
View Article and Find Full Text PDF
Article Synopsis
  • - NRG Oncology's subcommittee gathered a diverse group of experts to tackle the issues faced in early phase clinical trials that combine radiation therapy with new treatment drugs.
  • - The review highlights unique challenges in designing these trials, noting that they differ from traditional drug-drug combinations and are often neglected in planning.
  • - The authors suggest potential solutions to overcome these barriers and present examples of clinical trial designs aimed at improving the assessment of these innovative drug-radiotherapy combinations.
View Article and Find Full Text PDF
Article Synopsis
  • - The study investigates the photosynthetic induction rates of tree species and leaves from shaded versus sunlit environments, revealing conflicting evidence and ongoing debates about the mechanisms involved.
  • - Results show that species adapted to high light conditions generally have a faster initial increase in photosynthetic rate (SA), with sun species showing larger SA than shade species in 67% of comparisons.
  • - The findings suggest that sun-adapted species have a more efficient early response to light changes, which highlights the need to rethink how tree species adapt their photosynthetic strategies to variable light conditions.
View Article and Find Full Text PDF

Fungus-farming ants cultivate multiple lineages of fungi for food, but, because fungal cultivar relationships are largely unresolved, the history of fungus-ant coevolution remains poorly known. We designed probes targeting >2000 gene regions to generate a dated evolutionary tree for 475 fungi and combined it with a similarly generated tree for 276 ants. We found that fungus-ant agriculture originated ~66 million years ago when the end-of-Cretaceous asteroid impact temporarily interrupted photosynthesis, causing global mass extinctions but favoring the proliferation of fungi.

View Article and Find Full Text PDF

Laser-Induced Breakdown Spectroscopy as an Accurate Forensic Tool for Bone Classification and Individual Reassignment.

Appl Spectrosc

October 2024

Laser Chemistry Research Group, Department of Analytical Chemistry, Faculty of Chemistry, Complutense University of Madrid, 28040 Madrid, Spain.

This article provides a detailed discussion of the evidence available to date on the application of laser-induced breakdown spectroscopy (LIBS) and supervised classification methods for the individual reassignment of commingled bone remains. Specialized bone chemistry studies have demonstrated the suitability of bone elemental composition as a distinct individual identifier. Given the widely documented ability of the LIBS technique to provide elemental emission spectra that are considered elemental fingerprints of the samples analyzed, the analytical potential of this technique has been assessed for the investigation of the contexts of commingled bone remains for their individual reassignment.

View Article and Find Full Text PDF

Depression and Plasma pTau Levels Are Associated with Frailty Status in Hispanic Community-Dwelling Older Women.

Gerontol Geriatr Med

September 2024

Instituto de Investigaciones Científicas y Servicios de Alta Tecnología (INDICASAT-AIP), Panama City, Panama.

The population of Hispanic older adults is growing along with the burden of chronic diseases. This cross-sectional study aims to assess the factors associated with frailty among community-dwelling Hispanic women aged ≥60 years ( = 357) enrolled in the Panama Aging Research Initiative-Health Disparities study of cognitive-functional health of older persons in Panama. Cognitive function was assessed with a neuropsychological test battery.

View Article and Find Full Text PDF

Background: Cancer is the fourth leading cause of death in adolescents and young adults (AYA) worldwide. Although successful treatment of cancer in AYA has increased in recent years in most of the world, this is not true for many low- and middle-income countries (LMIC) where over 80% of all AYA live. This study investigated the needs of AYA with cancer in parts of Latin America (LATAM) through the perspectives of non-physician health care providers and partners.

View Article and Find Full Text PDF

Two ascomycetes, sp. and sp. were isolated from healthy leaves of the tropical gymnosperms (Z2) and (Z50) from Panama.

View Article and Find Full Text PDF

Predator perception of aposematic and cryptic color morphs in two species.

Ecol Evol

October 2024

Stiftung Tierärztliche Hochschule Hannover Institut für Zoologie Hannover Germany.

Animals that are toxic often advertise their unprofitability to potential predators through bright aposematic colors while cryptic ones blend in with their natural background to avoid predators. In the poison dart frogs, and some populations in Costa Rica and Panama display cryptic green and aposematic red color morphs. We herein used reflectance spectra from the dorsum of red and green morphs of these frogs to estimate their perception by the visual systems of three potential predators (birds, lizards, and crabs) against three natural backgrounds (leaves, trunks and leaf litter).

View Article and Find Full Text PDF

The Relationship Between Maturation Size and Maximum Tree Size From Tropical to Boreal Climates.

Ecol Lett

September 2024

Universite Grenoble Alpes, Institut National de Recherche Pour Agriculture, Alimentation et Environnement (INRAE), Laboratoire EcoSystemes et Societes En Montagne (LESSEM), Grenoble, France.

Article Synopsis
  • - The study examines the relationship between tree maturation size and reproduction, finding that larger tree species tend to start reproducing at a smaller size than expected, challenging previous assumptions.
  • - Researchers analyzed seed production data from 486 tree species across different climates, revealing that maturation size increases with maximum size but not in a straightforward manner.
  • - The results indicate that this trend is particularly pronounced in colder climates, highlighting the importance of understanding maturation size to better predict how forests will respond to climate change and disturbances.
View Article and Find Full Text PDF

Wind Shapes the Growth Strategies of Trees in a Tropical Forest.

Ecol Lett

September 2024

Conservation Research Institute and Department of Plant Sciences, University of Cambridge, Cambridge, UK.

In tropical forests, trees strategically balance growth patterns to optimise fitness amid multiple environmental stressors. Wind poses the primary risk to a tree's mechanical stability, prompting developments such as thicker trunks to withstand the bending forces. Therefore, a trade-off in resource allocation exists between diameter growth and vertical growth to compete for light.

View Article and Find Full Text PDF

Psychosocial and environmental motivational key factors behind the parenthood desire in infertile couples at the time of COVID-19.

J Assist Reprod Genet

November 2024

Reproductive Medicine, IVIRMA Global Research Alliance, IVIRMA Rome, Rome, Italy.

Purpose: To evaluate the main psychosocial motivational factors behind the increased adoption of IVF during the COVID-19 pandemic.

Methods: This prospective, multicenter, observational case-control study assessed the factors motivating infertile couples to pursue their first IVF treatment during the pandemic across various IVF clinics in Spain, Portugal, Italy, the USA, and Panama. A pre-pandemic control group and a post-pandemic participant group were surveyed.

View Article and Find Full Text PDF

Phylogeny and taxonomic revision of Metacephalus (Insecta: Hemiptera: Cicadellidae) with description of seven new leafhopper species.

J Insect Sci

July 2024

Laboratório de Entomologia, Departamento de Zoologia, Instituto de Biologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.

Metacephalus Delong and Martinson, 1973 includes leafhopper species from Argentina, Bolivia, Brazil, Colombia, Ecuador (new record), Guyana, French Guiana (new record), Panama, Peru, and Venezuela. In the present revisionary study, we describe seven new species of Metacephalus, propose one species synonymy (M. cinctus as junior synonym of M.

View Article and Find Full Text PDF

The Tropical Indo-Pacific (TIP) includes about two thirds of the world's tropical oceans and harbors an enormous number of marine species. The distributions of those species within the region is affected by habitat discontinuities and oceanographic features. As well as many smaller ones, the TIP contains seven large recognized biogeographic barriers that separate the Red Sea and Indian Ocean, the Indian from the Pacific Ocean, the central and eastern Pacific, the Hawaiian archipelago, the Marquesas and Easter Islands.

View Article and Find Full Text PDF

Xerostomia and Salivary Dysfunction in Patients With Diabetes Mellitus. A Cross-Sectional Study.

J Oral Pathol Med

November 2024

ORALMED Research Group, Department of Dental Clinical Specialties, Faculty of Odontology, Complutense University, Madrid, Spain.

Background: Diabetes mellitus (DM) has been associated with salivary disorders such as xerostomia and hyposalivation. The aim of this study was to determine the prevalence of these disorders and their risk factors in DM patients.

Methods: DM patients from two health centers were included.

View Article and Find Full Text PDF

Glaciers, which form due to the accumulation of snow, play a crucial role in providing freshwater resources, supporting river systems, and maintaining ecosystem stability. Pakistan is habitat to over 5000 glaciers, primarily located in the Hindukash, Himalaya, and Karakoram mountain ranges. Understanding the microbial communities thriving in these extreme environments becomes of utmost importance.

View Article and Find Full Text PDF

Resistance exercise and protein supplementation are recognized as effective treatment strategies for age-related sarcopenia; however, there are limited data on their feasibility, tolerability, and safety. The primary outcome of this study was feasibility, evaluated through the 15-item TELOS (Technological, Economics, Legal, Operational, and Scheduling) feasibility components and by recruitment, retention, and consent rates. Tolerability was measured by examining permanent treatment discontinuation, treatment interruption, exercise dose modification, early termination, rescheduling of missed sessions, losses to follow-up, attendance, and nutritional compliance.

View Article and Find Full Text PDF

Advances in Vaccines: Current Development and Future Prospects.

Pathogens

September 2024

Centro de Biología Celular y Molecular de Enfermedades, Instituto de Investigaciones Científicas y Servicios de Alta Tecnología (INDICASAT-AIP), Panama City 0843-01103, Panama.

Leishmaniasis is a neglected tropical disease caused by parasites of the genus . As approved human vaccines are not available, treatment and prevention rely heavily on toxic chemotherapeutic agents, which face increasing resistance problems. The development of effective vaccines against human leishmaniasis is of utmost importance for the control of the disease.

View Article and Find Full Text PDF