1,025 results match your criteria: "Ciudad Universitaria s n[Affiliation]"

Red blood cells possess a singular mechanobiology, enabling efficient navigation through capillaries smaller than their own size. Their plasma membrane exhibits non-equilibrium shape fluctuation, often reported as enhanced flickering activity. Such active membrane motion is propelled by motor proteins that mediate interactions between the spectrin skeleton and the lipid bilayer.

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Thermoelectric materials offer a promising avenue for energy management, directly converting heat into electrical energy. Among them, AgSbTe has gained significant attention and continues to be a subject of research at further improving its thermoelectric performance and expanding its practical applications. This study focuses on Ag-deficient AgSbTe and AgSbTeSe materials, examining the impact of compositional engineering within the AgSbTe thermoelectric system.

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Article Synopsis
  • - The study examines the effects of climate change on the tree growth of Pinus pinaster in Spain over the last 70 years, utilizing long-term data and classification algorithms to identify ecological trends.
  • - Findings reveal a general decline in tree growth in three out of five ecological regions since the 1970s, correlating with rising temperatures and decreasing precipitation, while the Atlantic-influenced region remains stable.
  • - The research suggests that forest management practices, like maintaining low basal area, may help mitigate growth declines in some areas, but forecasts predict that continued temperature increases could exacerbate these declines in the future.
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  • The future performance of European beech trees is uncertain due to their sensitivity to drought, and there is limited understanding of how climate change impacts their drought vulnerability across different regions.
  • The study uses a drought index to analyze how drought sensitivity of beech’s secondary growth varies over time, revealing that sensitivity is higher in dry environments and can be influenced by climatic conditions as well as tree competition within forests.
  • Results indicate that during severe droughts, beech growth may become less connected to climatic factors, suggesting a potential decline in drought tolerance and highlighting the complexity of the species' response to climate change.
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Exposure to atrazine and endosulfan alters oviductal adenogenesis in the broad-snouted caiman (Caiman latirostris).

Environ Sci Pollut Res Int

May 2024

Institute of Health and Environment of the Coast-Instituto de Salud y Ambiente del Litoral (ISAL)-, Universidad Nacional del Litoral (UNL)-National Council of Cientific and Technical Research-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Universitaria S/N, 4to Piso, CP3000, Santa Fe, Argentina.

Article Synopsis
  • The study explores the conserved molecular pathways of oviductal adenogenesis in Caiman latirostris, focusing on the effects of environmentally relevant doses of endosulfan (END) and atrazine (ATZ).
  • Exposure to END negatively impacted histological characteristics and gene expression related to oviductal adenogenesis, while ATZ led to changes in the subepithelial structure and increased β-catenin expression.
  • These findings suggest that pesticide exposure can disrupt oviductal development, potentially affecting fertility in wildlife and domestic animals, highlighting the risks of pesticide pollution.
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Effectiveness and chemical insights: Exploring interactions between nanomicelles and monoterpenoids for head lice treatment.

Pestic Biochem Physiol

May 2024

Instituto de Ecología y Desarrollo Sustentable (INEDES, CONICET-UNLu), Ruta 5 y Avenida Constitución 6700, Luján, Buenos Aires, Argentina.

This study evaluates the pediculicidal activity of nanoformulations containing different binary essential oil component mixtures (eugenol:linalool, 1,8 -cineole:linalool, and eugenol:thymol) using immersion bioassays. These have allowed us to evaluate the knockdown time affecting 50% of the individuals (KT). In addition, the type of interaction between the components in each mixture was established in terms of the combination index (IC).

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Obesity is a worldwide epidemic, making it crucial to understand how it can be effectively prevented/treated. Considering that obesity is a multifactorial condition, this article carried out a baseline cross-sectional study of the variables involved in the disorder. Eighty-four subjects with overweight/obesity were recruited.

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The Influence of Chitosan on the Chemical Composition of Wines Fermented with .

Foods

March 2024

Department of Chemistry and Food Technology, Polytechnic University of Madrid, Ciudad Universitaria S/N, 28040 Madrid, Spain.

Chitosan exerts a significant influence on various chemical parameters affecting the quality of wine produced using multiple strains of . The impact of chitosan on these parameters varies depending on the specific strain studied. We observed that, under the influence of chitosan, the fermentation kinetics accelerated for all examined strains.

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Background: Bovine genital campylobacteriosis (BGC) is caused by Campylobacter fetus subsp. venerealis (Cfv) including its biovar intermedius (Cfvi). This sexually transmitted disease induces early reproductive failure causing considerable economic losses in the cattle industry.

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Toxoplasma gondii is a paradigmatic zoonotic parasite from the One Health perspective, since it is broadly distributed and virtually infects all warm-blooded species. A wide variety of serological techniques have been developed to detect T. gondii infection in humans and animals.

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Increasing Dimensionality in Self-Assembly: Toward Two-Dimensional Supramolecular Polymers.

Chemistry

June 2024

Departmento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040, -Madrid, Spain.

Different approaches to achieve 2D supramolecular polymers, as an alternative to the covalent bottom-up approaches reported for the preparation of 2D materials, are reviewed. The significance of the operation of weak non-covalent forces to induce a lateral growth of a number of self-assembling units is collected. The examples of both thermodynamically and kinetically controlled formation of 2D supramolecular polymers showed in this review demonstrate the utility of this strategy to achieve new 2D materials with biased morphologies (nanosheets, scrolls, porous surfaces) and showing elegant applications like chiral recognition, enantioselective uptake or asymmetric organic transformations.

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The objective of this work was to develop an actinide-specific monolithic support in capillary designed to immobilize precise Pu:Am ratios and its coupling to inductively coupled plasma mass spectrometry (ICP-MS) for immobilized metal affinity chromatography applications. This format offers many advantages, such as reducing the sample amount and waste production, which are of prime importance when dealing with highly active radioelements. Four organic phosphorylated-based monoliths were synthesized in situ through UV photo-polymerization in capillary and characterized.

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Oligo(phenyleneethynylene)s (OPEs) have attracted widespread attention due to their remarkable (opto)electronic and photophysical properties, which have enabled numerous applications. The versatile functionalization possibilities of OPEs make them unique candidates to form various shape-persistent geometries, including linear, triangular, rectangular, hexagonal and macrocyclic. However, as a result of this structural variety, it is oftentimes challenging to correlate molecular design with self-assembly properties.

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Campylobacter fetus comprises two closely related mammal-associated subspecies: Campylobacter fetus subsp. fetus (Cff) and Campylobacter fetus subsp. venerealis (Cfv).

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Computational tools to study non-covalent interactions and confinement effects in chemical systems.

Chem Commun (Camb)

March 2024

Departamento de Química, División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, Col. Vicentina, Iztapalapa. C.P. 09340, Ciudad de México, Mexico.

Confinement is a very common phenomenon in chemistry, for example, when molecules are located inside cavities. In these conditions, the electronic structure of atoms and molecules is modified. These changes could be mapped through the interaction with other molecules since non-covalent interactions between molecules are also influenced by confinement.

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Article Synopsis
  • TNT is a toxic explosive that contaminates the environment throughout its lifecycle, prompting the need for effective remediation strategies.
  • This study presents the use of laccases from the fungus Pycnoporus sanguineus CS43 to biotransform TNT, achieving conversion rates of 80% and 87% under different oxygen conditions.
  • The research highlights the potential of using laccases as a sustainable method for addressing TNT contamination, producing various harmless byproducts confirmed through advanced chromatography techniques.
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We lack understanding of how variable is radial growth of coexisting tree and shrub species, and how growth is constrained by drought depending on site aridity. Here, we compared the radial growth of two widespread and coexisting species, a winter deciduous shrub (Amelanchier ovalis Medik.) and an evergreen conifer tree (Pinus sylvestris L.

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Detecting determinism and nonlinear properties from empirical time series is highly nontrivial. Traditionally, nonlinear time series analysis is based on an error-prone phase space reconstruction that is only applicable for stationary, largely noise-free data from a low-dimensional system and requires the nontrivial adjustment of various parameters. We present a data-driven index based on Fourier phases that detects determinism at a well-defined significance level, without using Fourier transform surrogate data.

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Combined use of SAR images and numerical simulations to identify the source and trajectories of oil spills in coastal environments.

Mar Pollut Bull

February 2024

Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Estación El Carmen, Ciudad del Carmen, Campeche 24157, Mexico.

Remote sensing data and numerical simulation are important tools to rebuild any oil spill accident letting to identify its source and trajectory. Through these tools was identified an oil spill that affected Oaxacan coast in October 2022. The SAR images were processed with a standard method included in SNAP software, and the numerical simulation was made using Lagrangian transport model included in GNOME software.

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Effect of light stress on lutein production with associated phosphorus removal from a secondary effluent by the autoflocculating microalgae consortium BR-UANL-01.

3 Biotech

January 2024

Centro de Investigación en Biotecnología y Nanotecnología (CIByN), Facultad de Ciencias Químicas, Parque de Investigación e Innovación Tecnológica, Km. 10 Autopista Al Aeropuerto Internacional Mariano Escobedo, 66629 Apodaca, Nuevo León Mexico.

Microalgae have become promising microorganisms for generating high-value commercial products and removing pollutants in aquatic systems. This research evaluated the impact of sunlight intensity on intracellular pigment generation and phosphorus removal from secondary effluents by autoflocculating microalgae consortium BR-UANL-01 in photobioreactor culture. Microalgae were grown in a secondary effluent from a wastewater treatment plant, using a combination of low and high light conditions (photon irradiance; 44 μmol m s and ≈ 1270 μmol m s, respectively) and 16:8 h light:dark and 24:0 h light:dark (subdivided into 18:6 LED:sunlight) photoperiods.

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Using underwater currents as an occupational enrichment method to improve the stress status in rainbow trout.

Fish Physiol Biochem

April 2024

Departamento de Producción Animal, Universidad Complutense de Madrid, Avenida Puerta de Hierro S/N, 28040, VeterinariaMadrid, Spain.

Article Synopsis
  • The study looked at how underwater currents affect stress in rainbow trout.
  • Fish were divided into three groups: no currents, random currents, and constant currents, and were tested for 30 days.
  • The group with random currents showed less stress and better energy levels compared to the others, suggesting that currents can help trout feel better when they're being raised.
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  • Researchers looked at how Imatinib, exosomes, and a mix of both affect chronic myeloid leukemia (CML) in special tests with rats.
  • They used math models to understand how these treatments change tumor growth and measured their effects over 40 days.
  • The study found that Imatinib slows down tumor growth and shrinks tumors, exosomes speed up growth and increase tumor size, but when mixed, they make Imatinib work even better to reduce tumors significantly!
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Single and combination treatment of Toxoplasma gondii infections with a bumped kinase inhibitor and artemisone in vitro and with artemiside in experimentally infected mice.

Exp Parasitol

December 2023

Institute of Parasitology, Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Länggass-Strasse 122, CH-3012, Bern, Switzerland. Electronic address:

Article Synopsis
  • Previous studies indicated that the compounds artemisone, artemiside, and BKI-1748 are effective against T. gondii through different mechanisms, suggesting potential synergistic effects when used together.
  • Experimental results showed that the combination of these compounds significantly lowered the inhibition constants (IC) compared to individual treatments, with noticeable changes in cellular structure of the parasite when treated collectively.
  • However, when tested in live mice, the combined treatment did not reduce T. gondii infection levels in the brain, and the promising in vitro findings did not translate effectively to the in vivo model, highlighting challenges in applying lab results to real-life scenarios.
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Bioactivity of Fractions and Pure Compounds from (Ortega) Müll. Arg. Bark Extracts.

Plants (Basel)

November 2023

Programa de Posgrado en Ciencias Biomédicas, Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Sinaloa, Ciudad Universitaria s/n, Culiacán 80010, Mexico.

Medicines for chronic inflammation can cause gastric ulcers and hepatic and renal issues. An alternative treatment for chronic inflammation is that of natural bioactive compounds, which present low side effects. Extracts of (Ortega) Müll.

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Endosulfan is an organochlorine insecticide widely used for agricultural pest control. Many nations worldwide have restricted or completely banned it due to its extreme toxicity to fish and aquatic invertebrates. Arthrobacter sp.

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