A new, sustainable polypropylene terephthalate (PPT) coating was synthesized from recycled polyethylene terephthalate (PET) and applied onto a hydraulic concrete substrate to improve its durability. ...For the first step, PET bottle wastes were ground and depolymerized by glycolysis using propylene glycol (PG) in a vessel-type reactor (20-180 °C) to synthesize bis(2-hydroxypropyl)-terephthalate (BHPT), which was applied as a coating to one to three layers of hydraulic concrete substrate using the brushing technique and polymerized (150 °C for 15 h) to obtain PPT. PET, BHPT, and PPT were characterized by FT-IR, PET, and PPT using TGA, and the PPT coatings by SEM (thickness), ASTM-D3359-17 (adhesion), and water contact angle (wettability). The durability of hydraulic concrete coated with PPT was studied using resist chloride ion penetration (ASTM-C1202-17), carbonation depth at 28 days (RILEM-CPC-18), and the absorption water ratio (ASTM-C1585-20). The results demonstrated that the BHPT and PPT were synthetized (FT-IR), and PPT had a similar thermal behavior to PET (TGA); the PPT coatings had good adhesion to the substrate, with thicknesses of micrometric units. PPT coatings presented hydrophilic hydrophilic behavior like PET coatings, and the durability of hydraulic concrete coated with PPT (2-3 layers) improved (migration of chloride ions decreased, carbonation depth was negligible, and the absorption water ratio decreased).
Twenty to thirty percent of persons with Trypanosoma cruzi infection eventually develop cardiomyopathy. If an early indicator were to be identified and validated in longitudinal studies, this could ...enable treatment to be prioritized for those at highest risk. We evaluated cardiac and extracellular matrix remodeling markers across cardiac stages in T. cruzi infected (Tc+) and uninfected (Tc-) individuals.
Participants were recruited in a public hospital in Santa Cruz, Bolivia and assigned cardiac severity stages by electrocardiogram and echocardiogram. BNP, NTproBNP, CKMB, troponin I, MMP-2, MMP-9, TIMP-1, TIMP-2, TGFb1, and TGFb2 were measured in specimens from 265 individuals using multiplex bead systems. Biomarker levels were compared between Tc+ and Tc- groups, and across cardiac stages. Receivers operating characteristic (ROC) curves were created; for markers with area under curve>0.60, logistic regression was performed.
Analyses stratified by cardiac stage showed no significant differences in biomarker levels by Tc infection status. Among Tc+ individuals, those with cardiac insufficiency had higher levels of BNP, NTproBNP, troponin I, MMP-2, TIMP-1, and TIMP-2 than those with normal ejection fraction and left ventricular diameter. No individual marker distinguished between the two earliest Tc+ stages, but in ROC-based analyses, MMP-2/MMP-9 ratio was significantly higher in those with than those without ECG abnormalities.
BNP, NTproBNP, troponin I, MMP-2, TIMP-1, and TIMP-2 levels rose with increasing severity stage but did not distinguish between Chagas cardiomyopathy and other cardiomyopathies. Among Tc+ individuals without cardiac insufficiency, only the MMP-2/MMP-9 ratio differed between those with and without ECG changes.
Lam, commonly known as moringa, is a plant widely used both as a human food and for medicinal purposes around the world. This research aimed to evaluate the efficacy of the aqueous extract of
leaves ...(MoAE) and benzyl isothiocyanate (BIT) in rats with induced breast cancer. Cancer was induced with 7,12-dimethylbenzaanthracene (DMBA) at a dose of 60 mg/kg by orogastric gavage once only. Forty-eight rats were randomly assigned to eight groups, each consisting of six individuals. The control group (healthy) was called Group I. Group II received DMBA plus saline. In addition to DMBA, Groups III, IV, and V received MoAE at 100, 250, and 500 mg/kg/day, respectively, while Groups VI, VII, and VIII received BIT at 5, 10, and 20 mg/kg/day, respectively. Treatment was carried out for 13 weeks. Secondary metabolite analysis results identified predominantly quercetin, caffeoylquinic acid, neochlorogenic acid, vitexin, and kaempferol, as well as tropone, betaine, loliolide, and vitexin. The administration of MoAE at a dose of 500 mg/kg and BIT at 20 mg/kg exhibited a notable decrease in both the total tumor count and the cumulative tumor weight, along with a delay in their onset. Furthermore, they improved the histological grade. A significant decrease in serum levels of VEGF and IL-1β levels was observed (
< 0.001) with a better effect demonstrated with MoAE at 500 mg/kg and BIT at 20 mg/kg. In conclusion, this study suggests that both the aqueous extract of
leaves and the benzyl isothiocyanate possess antitumor properties against mammary carcinogenesis, and this effect could be due, at least in part, to the flavonoids and isothiocyanates present in the extract.
The novel Cuphen(VBA)
H
O complex (phen: phenanthroline, VBA: vinylbenzoate) was prepared and used as a functional monomer to preorganize a new ion-imprinted polymer (IIP). By leaching the Cu(II) ...from the molecular imprinted polymer (MIP), Cuphen(VBA)
H
O-
-EGDMA
(EGDMA: ethylene glycol dimethacrylate), the IIP was obtained. A non-ion-imprinted polymer (NIIP) was also prepared. The crystal structure of the complex and some physicochemical, spectrophotometric techniques were also used for the MIP, IIP, and NIIP characterization. The results showed that the materials are nonsoluble in water and polar solvents, which are the main features of polymers. The surface area of the IIP is higher than the NIIP demonstrated by the blue methylene method. The SEM images show monoliths and particles smoothly packed together on spherical and prismatic-spherical surfaces in the morphology of MIP and IIP, respectively. Moreover, the MIP and IIP could be considered as mesoporous and microporous materials, shown by the size of the pores determined by the BET and BJH methods. Furthermore, the adsorption performance of the IIP was studied using copper(II) as a contaminant heavy metal. The maximum adsorption capacity of IIP was 287.45 mg/g at 1600 mg/L Cu
ions with 0.1 g of IIP at room temperature. The Freundlich model was found to best describe the equilibrium isotherm of the adsorption process. The competitive results indicate that the stability of the Cu-IIP complex is higher than the Ni-IIP complex with a selectivity coefficient of 1.61.
Sarcoidosis is a multisystemic granulomatous disease of unknown origin. It is characterized by abnormal activation of lymphocytes and macrophages with the formation of granulomas. Most cases have ...asymptomatic pulmonary involvement. In case of symptoms, they have an excellent response to glucocorticoid therapy. We present a case of sarcoidosis with multi-organ involvement, refractory to multiple treatments including biological. Partial remission was achieved in it.
We report an interesting case of a 38-years-old Spanish woman treated by Heerfordt's syndrome (uveitis, parotiditis, fever and facial palsy) plus pulmonary hiliar adenopathy. A sarcoidosis diagnosis was confirmed by lung biopsy. She was initially treated with an 8 weeks course of medium dose oral glucocorticoids and tapered over 8 weeks with improvement. After the suspension of glucocorticoids a relapse occurs with severe ocular involvement and suspicion of neurological involvement. The patient received multiple lines of treatment with poor response. Finally, after the combination of cyclophosphamide with infliximab, the uveitis resolved, improving the neurological symptoms.
Sarcoidosis is a benign disease in most cases. In a small percentage of cases behaves aggressively, requiring early diagnosis and immunosuppressive treatment to avoid sequelae. An adequate immunosuppressive therapy based on Anti TNF drugs should be started to minimize damage and improve the quality of life.The choice of treatment depends on the type and severity of the disease.
Virtual education has gained great relevance in recent years, due to the pandemic. The access to electronic devices and services represents an urgent necessity and thus the concern for acquiring ...digital competences, which allow a proper interaction within the teaching–learning process. Recent studies have demonstrated the importance of having digital resources and the adaptability of their use from the university students’ homes during the pandemic crisis. This research intends to identify the relevant challenges regarding the accessibility to technological devices and digital competences that university students had to face to obtain suitable learning during the lockdown, due to the pandemic. The sample information consisted of 9326 Peruvian university students. The data was obtained from the National Homes Survey from the Statistics and Information National Institute, and it was distributed in twenty-five regions (in groups of five macro-regions) over a period of three years (2019–2021). The results showed significant differences in the number of students with internet access from home: between 40% and 60% access classes with a desktop or laptop, and digital competences have improved in the last year. This is evidence that digital divides set limits on the opportunities for a quality education.
This study investigated the effect of host genetics on the structure and composition of the cecum microbiota of three breeds of guinea pigs: Andina, Inti, and Peru. Fifteen guinea pigs were ...distributed into three groups according to their breed: Andina (5), Inti (5), and Peru (5). We discovered that four main phyla were shared between the three breeds: Bacteroidota, Firmicutes, Spirochaetota, and Synergistota. Although there were no significant differences in the alpha and beta diversity analysis, we found that the Linear discriminant analysis effect size and the heat tree analysis showed significant differences between the abundance of several taxa present in the cecum microbiome of the three breeds. These results suggest that host genetics could be a factor in the structure and composition of the guinea pig cecum microbiome. In addition, we found unique genera for each breed that have fermentation capacity and, therefore can be analyzed in further studies to determine if there is a functional relationship between them and the breed and its industrial profile.
•The Peru breed had the highest richness and diversity index.•The genera in higher abundance in the three breeds were Muribaculaceae and Prevotella.•A total of 66 potential biomarkers were found among the three breeds of guinea pig.
Esta investigación buscó determinar el subregistro de casos de tuberculosis (TB) en la Región Cajamarca, Perú, en los años 2017 y 2018, mediante el método de captura recaptura, asimismo estimar la ...tasa de incidencia a través de este método, evaluar la exhaustividad de los sistemas de vigilancia, y describir las características epidemiológicas de la TB en el periodo estudiado. Se realizó un estudio descriptivo, retrospectivo en la Región Cajamarca; se analizaron dos sistemas de vigilancia: el Sistema de Información Gerencial de Tuberculosis (SIGTB) y el Sistema Epidemiológico de Tuberculosis (SIEPI-TB), en base al número de casos registrados en cada sistema se aplicó el método de captura y recaptura para obtener una estimación de casos reales, validando los datos con un modelo log-lineal en el entorno estadístico R. Los mayores subregistros en los sistemas fueron: 40,7% en el 2017 y 25,6% en el 2018; se encontró que las tasas de incidencia estimadas en ambos años fueron superiores a las reportadas por los sistemas oficiales, el sistema de vigilancia más exhaustivo fue el SIEPI-TB. Los resultados indican la existencia de un preocupante subregistro y la necesidad de monitoreo de los sistemas de vigilancia de tuberculosis.
Esta pesquisa procurou aferir a subnotificação de casos de tuberculose (TB) na Região de Cajamarca, nos anos 2017 e 2018 usando o método de captura-recaptura, também para estimar a taxa de incidência através deste método, avaliar a abrangência dos sistemas de vigilância e descrever as características epidemiológicas da tuberculose no período estudado. Um estudo descritivo e retrospectivo foi realizado na Região de Cajamarca; foram analisados dois sistemas de vigilância: o Sistema de Informação de Gestão da Tuberculose (SIGTB) e o Sistema Epidemiológico da Tuberculose (SIEPI-TB). Com base no número de casos registrados em cada sistema, o método de captura-recaptura foi aplicado para obter uma estimativa de casos reais, validando os dados com um modelo log-linear no ambiente estatístico R. As maiores subnotificações nos sistemas foram: 40,7% em 2017 e 25,6% em 2018; verificou-se que as taxas de incidência estimadas em ambos os anos foram mais altas do que as relatadas pelos sistemas oficiais, e que o sistema de vigilância mais abrangente foi o SIEPI-TB. Os resultados indicam a existência de uma subnotificação preocupante e a necessidade de monitoramento dos sistemas de vigilância da TB.
This study sought to determine the underreporting of tuberculosis (TB) cases in the Cajamarca Region, Peru in 2017 and 2018 through the capture-recapture method and to estimate the TB incidence rate using this method, assess the exhaustiveness of surveillance systems, and describe the epidemiological characteristics of TB in this period. A descriptive, retrospective study was performed in the Cajamarca Region; the surveillance systems were analyzed were the TB Management Information System (SIGTB) and the TB Epidemiological System (SIEPI-TB). Based on the number of cases recorded in each system, the capture-recapture method was applied to obtain an estimation of real cases, validating the data with a log-linear model in the R statistical environment. The largest underreporting rates in the systems were 40.7% in 2017 and 25.6% in 2018; the estimated incidence rates in both years were higher than those reported by the official systems, the most exhaustive surveillance system was SIEPI-TB. The results indicate the existence of worrisome underreporting and the need to monitor the TB surveillance systems.
En la presente nota describimos un caso de leucismo parcial en dos individuos (madre e hija) de zanate mayor (Quiscalus mexicanus) en el neotrópico. Entre noviembre de 2019 a mayo de 2021 en ...Guerrero, México, observamos a una hembra de Q. mexicanus con leucismo parcial, conservando la simetría bilateral. Durante 18 meses, no detectamos cambios en el patrón de la coloración anormal de la hembra adulta El día 11 de agosto del 2020, avistamos a la hembra adulta con pigmentación anormal alimentando a un juvenil, que igualmente presentaba anormalidad en la coloración del plumaje. Observamos que el leucismo en esta especie puede presentar variaciones, pero conserva la simetría bilateral. Asimismo, corroboramos que dicha anormalidad está presente desde el nacimiento, no varía con el tiempo y es trasmitido a la descendencia.
Exploring the microbiome of two uterine sites in cows Murga Valderrama, Nilton Luis; Segura Portocarrero, Gleni Tatiana; Romani Vasquez, Ana Cecilia ...
Scientific reports,
10/2023, Letnik:
13, Številka:
1
Journal Article
Recenzirano
Odprti dostop
Bacterial communities in the mammalian reproductive system can be rich and diverse, differing in structure and quantity depending on location. In addition, its microbiome is associated with the state ...of health of this tract and reproductive success. This study evaluated the microbiome composition of the uterine body (UB) and uterine horn mucosa (UH) samples using 16S rRNA sequencing of samples extracted from cows in the Amazon region. It was observed that four main phyla were shared between the uterine sites: Actinobacteria, Bacteroidetes, Firmicutes, and Proteobacteria. Linear discriminant analysis effect size and heat tree analysis showed that members of Lachnospiraceae (NK3A20 group) and Oscillospiraceae were significantly more abundant in the UB than in UH. In addition, there are more unique genera in the UB than in the UH. A higher bacterial load in UB than in UH is expected because of the exposure to external factors of UB. However, comparing the site's communities through beta diversity did not generate well-defined clustering. Thus, it can be attributed to the closeness of the sites, which would make the niches similar ecologically and microbiologically. Therefore, this research provides knowledge to understand biomarkers in the prior reproduction period.
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