Morphological and Phylogenetic Analyses of Ceratomyxa tessaloniensis n. sp. In Astyanax mexicanus De Fillipi, 1853 (Characiformes: Characidae) from the Flexal River, Tessalônica Community, Amapá, Amazon, Brazil.

Purpose: This work described a new species of Ceratomyxa, based on morphological and phylogenetic analyzes of myxospores collected from the gallbladder of the fish Astyanax mexicanus.

Methods: Sixty-two specimens were captured, between December 2022 and February 2024, in the Flexal River, in the community of Tessalônica, state of Amapá. The specimens were transported alive to the Laboratory of Morphophysiology and Animal Health, at the State University of Amapá, where the studies were carried out.

Noise reduction in brain magnetic resonance imaging using adaptive wavelet thresholding based on linear prediction factor.

Introduction: Wavelet thresholding techniques are crucial in mitigating noise in data communication and storage systems. In image processing, particularly in medical imaging like MRI, noise reduction is vital for improving visual quality and accurate analysis. While existing methods offer noise reduction, they often suffer from limitations like edge and texture loss, poor smoothness, and the need for manual parameter tuning.

Neonatal Abandonment and Hydrocephalus in Antillean Manatees (): Is There a Causal Relationship?

Manatees are semi-social animals, with the mother-calf relationship being considered long-lasting for the species. However, some events lead to the separation of this pair. Orphaned manatee calves can be adopted by other females of the same species.

New Henneguya Species Cause Gill Disease of Commercial Amazonian Fish.

Background: Freshwater fish are affected with much parasitic diseases, among the most common are Henneguyosis caused by myxozoans of the genus Henneguya, which exhibit great diversity in fish from South America, particularly in the Brazilian Amazon.

Purpose: In this present study, we describe the morphological and phylogenetic aspects of the small ribosomal subunit (SSU rDNA) of two new species of Henneguya infecting the gills from Hypophthalmus marginatus, a freshwater catfish from the Amazon.

Methods: In 148 specimens, has been observed cyst formation in different regions of the gills, intrafilamentary and intralamellar.

Reproductive Efficiency of Nelore Cows in Fixed-Time Artificial Insemination Programs with Early Resynchronization.

We aimed to evaluate the reproductive efficiency of Nelore cows in fixed-time artificial insemination (FTAI) programs with early resynchronization. A total of 468 Nelore cows were divided into two experimental groups: R30-conventional resynchronization at 30 days ( = 234); R22-early resynchronization at 22 days ( = 234). Both groups followed a synchronization protocol using intravaginal progesterone devices combined with the administration of steroids and gonadotropins.

New species of Ellipsomyxa (Bivalvulida: Ceratomyxidae) parasitizing the gallbladder of Ageneiosus ucayalensis (Siluriformes: Auchenipteridae) in the Brazilian Amazon region.

The present study describes a new myxozoan species, Ellipsomyxa matosi n. sp. infecting the gallbladder of the catfish Ageneiosus ucayalensis, on Jutuba Island, municipality of Belém, state of Pará, Brazil.

The effect of physical activity on markers of oxidative and antioxidant stress in cancer patients: a systematic review and meta-analysis.

Background: Prescribing physical exercise as part of the clinical treatment of cancer patients has become an important strategy in the therapeutic arsenal available in the main health centers specialized in neoplastic diseases, but there is still uncertainty regarding the role of regular physical activity in modifying oxidative stress markers and antioxidants, as high levels of oxidative stress can lead to the development of carcinogens. Therefore, we assessed the effect of physical activity versus absence of physical activity on markers of oxidative stress and antioxidants in cancer patients.

Methods: We looked for randomized controlled trials that included adult with any type of cancer performing some physical activity and compared them to a control group of cancer patients with no physical activity.

Assessing neighbourhood-scale BTI spray applications and laboratory-based mortality testing on larval development.

Mosquitoes, particularly , pose significant public health risks by transmitting diseases like dengue, zika and chikungunya. var. (BTI) is a crucial larvicide targeting mosquitoes while sparing other organisms and the environment.

Deep genetic divergences and few morphological changes support the cryptic speciation in Larimus breviceps (Sciaenidae, Acanthuriformes) from the western South Atlantic.

We evaluate the evidence of cryptic speciation in Larimus breviceps, a species widely distributed in the western South Atlantic, from the Greater Antilles to Santa Catarina in Brazil. Mitochondrial (COI, Cyt b, and Control Region) and nuclear (IGF1 and Tmo-4C4) sequences were obtained from populations in the western South Atlantic. The analysis revealed two genetically distinct, sympatric lineages with no gene flow, with L.

Biodegradation of oil-derived hydrocarbons by marine actinobacteria: A systematic review.

The intensive use of oil and its derivatives is related to a greater frequency of accidents involving the release of pollutants that cause harmful effects on ecosystems. Actinobacteria are cosmopolitan and saprophytic microorganisms of great commercial interest, but because they are predominantly found in soil, most research into the products of this phylum's metabolism has focused on this habitat. Marine actinobacteria exhibit unique metabolic characteristics in response to extreme conditions in their habitat, which distinguishes them from terrestrial actinobacteria.

A sustainable extraction approach for recovery of Rhamnogalacturonan I enriched pectin from Amazonian cocoa pod husk.

Approximately 16,000 thousand tonnes of cocoa husk are produced annually worldwide during the chocolate production chain, representing considerable potential for pectin extraction. The aim of this study was to investigate a new extraction technique using a binary system composed of carbon dioxide and water (CO + HO) at high pressure and temperature, on cocoa sample from floodplain ecosystem. Temperatures of 393.

Differential gene expression analysis supports dysregulation of mitochondrial activity as a new perspective for glioblastoma's aggressiveness.

Brain cancer is considered one of the most aggressive and lethal types of cancer, including primary tumors, being subdivided into milder forms such as low-grade gliomas and glioblastoma, considered the most aggressive form with higher invasion. Among the hallmarks of glioblastoma, the deregulation of mitochondrial metabolism has not yet been fully elucidated. Therefore, the search for mitochondrial biomarkers that can be used as indicators of the progression of this type of cancer is necessary.

Metallodrugs: Synthesis, mechanism of action and nanoencapsulation for targeted chemotherapy.

As a multifactorial and heterogeneous disease, cancer has a high mortality rate, and the search for more effective treatments is an enormous challenge. Metal coordination compounds open a range of possibilities that conventional organic and biological molecules can no longer fulfil due to increasing drug resistance. Metallodrugs still have tremendous potential to help overcome drug resistance and find new cures in medicine, considering that at least 25 metallic elements participate in healthy functioning of the human body.

Altered leukocyte pattern and inflammatory markers in unvaccinated long covid patients: a cross-sectional study.

Long Covid results from the damage caused by SARS-CoV-2, involving the release of cytokines and the continuous activation of immune cells. This cross-sectional study investigates leukocyte and cytokine profiles in Long Covid patients in the Amazon, a region where such studies are limited. Blood samples were analysed for differential leukocyte counts and cytokine levels.

n. sp. (Cnidaria: Myxosporea) parasitizing (Bloch 1794) from Tartarugalzinho river, eastern Amazon.

The Amazon basin has the largest number of fish in the world, and among the most common fishes of the Neotropical region, the threespot () is cited, which in relation to its microparasitic fauna, has described only 1 species of the genus , . The Myxozoa class is considered an obligate parasite, being morphologically characterized by spores formed by valves connected by a suture line. This study describes a new species of sp.

Unraveling the protective genetic architecture of COVID-19 in the Brazilian Amazon.

Despite all the efforts acquired in four years of the COVID-19 pandemic, the path to a full understanding of the biological mechanisms involved in this disease remains complex. This is partly due to a combination of factors, including the inherent characteristics of the infection, socio-environmental elements, and the variations observed within both the viral and the human genomes. Thus, this study aimed to investigate the correlation between genetic host factors and the severity of COVID-19.

Comprehensive analysis of the electronic, thermodynamic, and spectroscopic properties of a Cu(II)-based complex with 1,10-phenanthroline and L-glutamine.

This study reports additional information's of geometric, electronic, thermodynamic, and vibrational properties of a Cu(II) complex with 1,10-phenanthroline and L-glutamine ligands. The experimental spectroscopic analyses were corroborated by density functional theory (DFT). Furthermore, these properties were evaluated using an implicit solvation method with water and methanol solvents, including vacuum condition.

Exploring Thermal Stability, Vibrational Properties, and Biological Assessments of Dichloro(l-histidine)copper(II): A Combined Theoretical and Experimental Study.

Dichloro(l-histidine)copper(II) crystal ([Cu(l-His)Cl] complex) was obtained by the slow evaporation method and characterized concerning its thermal stability, phase transformations, and electronic and vibrational properties. X-ray diffraction (XRPD) confirmed that this complex crystallizes with an orthorhombic structure (222 space group). Thermal analyses (TG and DTA) demonstrate stability from ambient temperature up to 460 K, followed by a phase transition from the orthorhombic structure to the amorphous form around 465 K, as confirmed by temperature-dependent XRPD studies.

Effectiveness of dental arch expansion in the orthodontic treatment with clear aligners: a scoping review.

Background: The clinical protocol and effectiveness of dental expansion with Clear Aligner Therapy (CAT), especially among adults is still unclear. There is a need to map and explore knowledge gaps of dental expansion with CAT among children and adults.

Objective: This scoping review explores the extent and depth of the available literature regarding the effectiveness and predictability of CAT in performing orthodontic expansion in both children and adults.

A Gallbladder Ceratomyxidae (Myxozoa: Bivalvulida) Parasite Described In Pimelodella cristata (Müller & Troschel, 1848) From the Eastern Amazon.

Purpose: The Myxozoa class is characterized by parasites that have valves joined by a suture line and polar capsules containing eversible spiral filamento and this class is considered an obligate parasite. The genus Ceratomyxa has approximately 300 species described in fish, both marine and freshwater fish, mainly infecting the gallbladder, but also occurring in the urinary bladder. This study describes a new species of Ceratomyxa in the Amazon region for Pimelodella cristata.

Filling the gaps on parasites of : Helminth community structure of (Anura: Hylidae) from the Brazilian Amazon.

is an arboreal anuran widely distributed in South America. However, there are no parasitological studies conducted on the species, resulting in a parasite fauna completely unknown. Thus, this study aims to characterize the parasitic community structure of in the municipality of Pedra Branca do Amapari, Amapá state, Amazon region, Brazil.

Minocycline reduces alveolar bone loss and bone damage in Wistar rats with experimental periodontitis.

This study aimed to investigate the impact of minocycline on the alveolar bone in experimental periodontitis in rats. Thirty Wistar rats were randomly assigned to three groups: control without periodontitis; experimental periodontitis induced by ligature; experimental periodontitis + intraperitoneal administration minocycline for seven days. Ligatures remained in place in both periodontitis groups for 14 days.

Use of long-term underwater camera surveillance to assess the effects of the largest Amazonian hydroelectric dam on fish communities.

The increase in the construction of mega dams in tropical basins is considered a threat to freshwater fish diversity. Although difficult to detect in conventional monitoring programs, rheophilic species and those reliant on shallow habitats comprise a large proportion of fish diversity in tropical basins and are among the most sensitive species to hydropower impacts. We used Baited Remote Underwater Video (BRUV), an innovative, non-invasive sampling technique, to record the impacts caused by Belo Monte, the third largest hydropower project in the world, on fishes inhabiting fast waters in the Xingu River.

Tutton salt (NH)Zn(SO)(HO): thermostructural, spectroscopic, Hirshfeld surface, and DFT investigations.

Context: Ammonium Tutton salts have been widely studied in recent years due to their thermostructural properties, which make them promising compounds for application in thermochemical energy storage devices. In this work, a detailed experimental study of the Tutton salt with the formula (NH)Zn(SO)(HO) is carried out. Its structural, vibrational, and thermal properties are analyzed and discussed.