Facile preparation of embedded polar group-containing pentafluorophenyl stationary phases for highly selective separations of diverse analytes.

Pentafluorophenyl (PFP) stationary phase is one of the most important phases after the C18 phase in terms of its applications. Three embedded polar groups (EPG)-containing stationary phases were newly synthesized to act the EPGs as additional interaction sites. The silica surface was initially modified with (3-aminopropyl)trimethoxysilane (APS). The APS-modified silicas were coupled with 2,3,4,5,6-pentafluorobenzoic acid, 2,3,4,5,6-pentafluorophenylacetic acid, and 2,3,4,5,6-pentafluoro-anilino(oxo)acetic acid to obtain Sil-PFP-BA, Sil-PFP-AA, and Sil-PFP-AN phases, respectively. The new phases were characterized by elemental analysis, ATR-FTIR, scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). The phases were evaluated with the Tanaka and Neue tests in reversed-phase liquid chromatography (RPLC). In addition, they were characterized as hydrophilic phases by the Tanaka test protocol used in hydrophilic interaction chromatography (HILIC) separation mode. The Sil-PFP-AA phase showed the highest molecular shape selectivity in RPLC, while Sil-PFP-AN achieved the highest separability in HILIC compared to the commercial PFP reference column. The Sil-PFP-AA phase was successfully applied for the analysis of capsaicinoids from real samples of fresh chili peppers (Capsicum spp.) in RPLC and the Sil-PFP-AN phase for vitamin C (ascorbic acid) in HILIC.

Capillary electromigration methods for food analysis and Foodomics: Advances and applications in the period March 2021 to March 2023.

This work presents a revision of the main applications of capillary electromigration (CE) methods in food analysis and Foodomics. Papers that were published during the period March 2021 to March 2023 are included. The work shows the multiple CE methods that have been developed and applied to analyze different types of molecules in foods and beverages. Namely, CE methods have been applied to analyze amino acids, biogenic amines, heterocyclic amines, peptides, proteins, phenols, polyphenols, pigments, lipids, carbohydrates, vitamins, DNAs, contaminants, toxins, pesticides, additives, residues, small organic and inorganic compounds, and other minor compounds. In addition, new CE procedures to perform chiral separation and for evaluating the effects of food processing as well as the last developments of microchip CE and new applications in Foodomics will be also discussed. The new procedures of CE to investigate food quality and safety, nutritional value, storage, and bioactivity are also included in the present review work.

Surface Modification of Silica with ß-Alanine Derivatives for Unique Applications in Liquid Chromatography.

Column purchasing cost is an important issue for an analyst to analyze complex sample matrices. Here, we report the development of an amino acid (ß-alanine)-derived stationary phase (Sil-Ala-C12) with strategic and effective interaction sites (amide and urea as embedded polar groups with C12 alkyl chain) able to separate various kinds of analytes. Owing to the balanced hydrophobicity and hydrophilicity of the phase, it showed exceptional separation abilities in both reversed-phase high-performance liquid chromatography (RP-HPLC) as a hydrophobic phase and hydrophilic interaction chromatography (HILIC) as a hydrophilic phase. Remarkably, the baseline separation was achieved for the challenging ß- and γ-isomers of tocopherol. Usually, three columns such as pentafluorophenyl or C30, C18, and sulfobetaine HILIC are required for the analysis of vitamin E, capsaicinoids, and vitamin C in chili peppers (Capsicum spp.), respectively. However, only Sil-Ala-C12 was able to separate these analytes. A single column can serve 3-4 purposes, which suggests that Sil-Ala-C12 had the potential to reduce column purchasing costs.

Evolution of anthocyanin content during grape ripening and characterization of the phenolic profile of the resulting wine by comprehensive two-dimensional liquid chromatography.

The typical phenolic profile in grapes is characterized by its complexity both in terms of number of diverse chemical structures and their variation during ripening. Besides, the specific phenolic composition of grapes directly influences the presence of those components in the resulting wine. In this contribution, a new method based on the application of comprehensive two-dimensional liquid chromatography coupled to a diode array detector and tandem mass spectrometry has been developed to obtain the typical phenolic profile of Malbec grapes cultivated in Brazil. Moreover, the method has been demonstrated to be useful to study how the phenolic composition in grapes evolved during a 10-week ripening period. Main detected compounds in grapes and in the wine derived from them were anthocyanins, although a good number of polymeric flavan-3-ols were also tentatively identified, among other compounds. Results show how the amount of anthocyanins present in grapes was increased during ripening up to 5-6 weeks and then decreased towards week 9. The two-dimensional approach applied was demonstrated to be useful for the characterization of the complex phenolic profile of these samples, involving more than 40 different structures and has the potential to be further applied to the study of this important fraction is different grapes and wines systematically.

Design of ß-Alanine-Derived Novel C18 Stationary Phase Containing Embedded Urea and Amide Groups for the Separation of Versatile Analytes.

Novel stationary phases have been emerging recently. A ß-alanine-derived embedded urea and amide group-containing C18 phase (Sil-Ala-C18) was prepared for the first time. The media were packed into a 150 × 2.1 mm HPLC column, and the newly designed column was evaluated with the Tanaka and Neue test protocols in reversed-phase liquid chromatography (RPLC) separation mode. Moreover, it was characterized by the Tanaka test protocol in hydrophilic interaction chromatography (HILIC) separation mode. The new phase was characterized by elemental analysis, attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and solid-state 13C cross-polarization magic angle spinning (CP/MAS) NMR spectroscopy at variable temperatures. The chromatographic evaluation involved very good separation of nonpolar shape-constrained isomers, polar and basic compounds in RPLC, and highly polar compounds in HILIC compared to the commercial reference columns. The Sil-Ala-C18 phase was able to separate the challenging ß- and γ-isomers of tocopherol. The phase was also successfully applied for the separation of the isomers of tocopherol (vitamin E) and capsaicinoids from real samples of chili peppers (Capsicum spp.) in RPLC and ascorbic acid (vitamin C) in HILIC.

Comprehensive and heart-cutting multidimensional liquid chromatography-mass spectrometry and its applications in food analysis.

In food analysis, conventional one-dimensional liquid chromatography methods sometimes lack sufficient separation power due to the complexity and heterogeneity of the analysed matrices. Therefore, the use of two-dimensional liquid chromatography (2D-LC) turns out to be a powerful tool to consider, especially when coupled to mass spectrometry (MS). This review presents the most remarkable 2D-LC-MS food applications reported in the last 10 years, including a critical discussion of the multiple approaches, modulation strategies as well as the importance of the optimisation of the different analytical aspects that will condition the 2D-LC-MS performance. The presence of contaminants in food (food safety), the food quality and authenticity or the relationship between the beneficial effects of food and human health are some of the fields in which most of the 2D-LC-MS applications are mainly focused. Both heart-cutting and comprehensive applications are described and discussed in this review, highlighting the potential of 2D-LC-MS for the analysis of such complex samples.

Comprehensive and heart-cutting multidimensional liquid chromatography-mass spectrometry and its applications in food analysis.

In food analysis, conventional one-dimensional liquid chromatography methods sometimes lack sufficient separation power due to the complexity and heterogeneity of the analyzed matrices. Therefore, the use of two-dimensional liquid chromatography (2D-LC) turns out to be a powerful tool to consider, especially when coupled to mass spectrometry (MS). This review presents the most remarkable 2D-LC-MS food applications reported in the last 10 years, including a critical discussion of the multiple approaches, modulation strategies as well as the importance of the optimization of the different analytical aspects that will condition the 2D-LC-MS performance. The presence of contaminants in food (food safety), the food quality, and authenticity or the relationship between the beneficial effects of food and human health are some of the fields in which most of the 2D-LC-MS applications are mainly focused. Both heart-cutting and comprehensive applications are described and discussed in this review, highlighting the potential of 2D-LC-MS for the analysis of such complex samples.

Comprehensive two-dimensional gas chromatography with flow modulator coupled via tube plasma ionization to an atmospheric pressure high-resolution mass spectrometer for the analysis of vermouth volatile profile.

The analysis of complex samples is a big analytical challenge due to the vast number of compounds present in these samples as well as the influence matrix components could cause in the methodology. In this way, comprehensive two-dimensional gas chromatography coupled to mass spectrometry (GC × GC-MS) is a very powerful tool to achieve the characterization of complex samples. Nevertheless, due to possible coelutions occurring in these matrices, mixed spectra are generally obtained with electron ionization (EI) which could extremely complicate the identification of the analytes. Thereby, new methodology setups are required to improve the confidence on the identification in non-targeted determinations. Here, we present a high-throughput methodology consisting of GC × GC with flow modulation coupled to high-resolution atmospheric pressure mass spectrometry (HRMS) via a novel tube plasma ion source (TPI). The flow modulator allows to easily automate the GC × GC method compared to traditional cryo-modulators, while the soft ionization provided by TPI helps to preserve the [M]+• or [M+H]+ ions, thus increasing the confidence in the identification. Additionally, the combination of a flow modulation with an atmospheric pressure mass spectrometer significantly improves the sensitivity over flow modulated GC × GC-EI-MS methods because no split is required. This methodology was applied to the analysis of a complex sample such as vermouth where the volatile profile is usually considered by consumers as a product quality indicator since it raises the first sensations produced during its consumption. Using this approach, different classes of compounds were tentatively identified in the sample, including monoterpenes, terpenoids, sesquiterpenoids and carboxylic acid, and carboxylate esters among others, showing the great potential of a GC × GC-TPI-qTOF-MS platform for improving the confidence of the identifications in non-targeted applications.

Multi-2D LC × LC as a Novel and Powerful Implement for the Maximum Separation of Complex Samples.

Achieving complete information about the chemical composition of complex samples requires the use of multianalytical platforms able to maximize the acquisition of high-quality data for unequivocal identification. However, this process requires long analysis times and several instruments. Food analysis is one of the analytical fields where the analysis of very complex samples has a huge impact. One of these complex samples is vermouth, a fortified wine based on the maceration of a large number of herbs, fruits, barks, seeds, and leaves. The application of conventional or even advanced analytical techniques like comprehensive two-dimensional (2D) liquid chromatography (LC × LC) does not provide enough separation power to resolve the complete profile of this sample. In this work, a novel 2DLC strategy called multi-2D LC × LC is developed. This new setup consists of the use of two different columns with different separation properties in the second dimension (2D) that can be selected during the LC × LC analysis accordingly to the chemical nature of the compounds eluted from the first dimension (1D). The vermouth sample was analyzed using a 1D-PFP and a combination of HILIC (from 0 to 30 min) and C18 (from 30 to the end) columns in the 2D. This setup increased both the peak capacity and the orthogonality of the analysis in comparison to the use of only one of the columns in the 2D. Multi-2D LC × LC is presented as an integrated 2DLC tool that maximizes the separation capacity for very complex samples.

Review on atmospheric pressure ionization sources for gas chromatography-mass spectrometry. Part I: Current ion source developments and improvements in ionization strategies.

The use of atmospheric pressure ionization (API) sources has become very popular for gas chromatography-mass spectrometry (GC-MS) determinations. GC-API-MS shows important advantages over traditional vacuum ionization sources such as a lower fragmentation preserving the molecular or quasi-molecular ion, the combination of GC separations with advanced mass spectrometers typically developed for liquid chromatography (LC) systems, a significantly higher sensitivity, or the reduction of costs due to the capability to use the same MS for both LC- and GC- couplings. For these reasons, the development of new API sources and GC-API-MS platforms has exponentially increased during the last years. Thus, this review is mainly focused on the last advances in GC-API-MS instrumentation. New setups and couplings on extensively reported API techniques as well as the development of new API sources for GC-MS coupling are thoroughly discussed. Moreover, novel ionization strategies have been reviewed to overcome some of the drawbacks of GC-API-MS methodologies.

Review on atmospheric pressure ionization sources for gas chromatography-mass spectrometry. Part II: Current applications.

The application of atmospheric pressure ionization (API) sources in gas chromatography-mass spectrometry (GC-MS) determinations is becoming more popular since they have shown great capabilities to sort out the main drawbacks of vacuum ionization techniques like electron ionization (EI) and chemical ionization (CI). The development of new API techniques and set-ups have grown in the last decades, opening the field of GC-MS to new applications and facing some of the major issues in current analytical methodologies such as the requirement of a compromise between sensitivity and selectivity. Thus, this review is mainly focused on the use of GC-API-MS in different application fields such as food analysis (food safety and food metabolomics), environmental analysis, clinical analysis, drug and pharmaceutical analysis, and petroleomics, among others. The methodologies have been critically reviewed to compare the performance of different API sources and approaches, highlighting the main contributions to overcoming some of the major limitations of the current methodologies as well as the new perspectives that GC-API-MS might open in the different fields.

Análisis crítico del programa curso propio Terapéutica Razonada para la carrera de Medicina en Cuba / Critical analysis of the Reasoned Therapeutic course program for the Medicine career in Cuba

RESUMEN Fundamento: el análisis de los programas de estudio para identificar potencialidades e insuficiencias, formular propuestas para su gestión o rediseño curricular, constituye una necesidad en las universidades médicas cubanas. Objetivo: analizar el programa analítico del curso de contenido propio Terapéutica Razonada para la carrera de Medicina en Cuba. Métodos: estudio cualitativo realizado en el tercer trimestre del año 2021. Se realizaron búsquedas en internet mediante buscadores especializados y los descriptores en ciencias de salud. Se utilizaron métodos teóricos como el analítico sintético y el inductivo deductivo y como método empírico, el análisis documental, los cuales permitieron establecer los criterios para el análisis y realizar el análisis del programa propiamente dicho. Resultados: se identifican las fortalezas y debilidades en torno a la justificación, pertinencia social, aspectos generales que lo caracterizan, nexos con el currículo formal, secuencia lógica en el currículo, organización de los temas, equilibrio entre las horas teóricas, prácticas y de trabajo independiente, análisis de los componentes no personales, orientaciones metodológicas, así como el análisis de la bibliografía. Las insuficiencias de mayor relevancia se orientan hacia la necesidad de reformular los objetivos, declarar métodos de enseñanza, incluir horas para la educación en el trabajo, explicitar las orientaciones metodológicas y actualizar la bibliografía. Conclusiones: el programa responde al encargo social de las universidades cubanas y su diseño se ajusta a las exigencias curriculares contemporáneas, pero se identifican aspectos que requieren atención en aras de su perfeccionamiento.

ABSTRACT Background: the analysis of the study programs to identify potentialities and insufficiencies, formulate proposals for their management or curricular redesign, constitutes a necessity in Cuban medical universities. Objective: to analyze the analytical program of the Reasoned Therapeutics course with its own content for the Medicine career in Cuba. Methods: qualitative study carried out in the third quarter of 2021. Internet searches were carried out using specialized search engines and descriptors in health sciences. Theoretical methods were used, such as synthetic analytical and inductive-deductive, and documentary analysis as an empirical method, which allowed establishing the criteria for the analysis and carrying out the analysis of the program itself. Results: the strengths and weaknesses around the justification, social relevance, general aspects that characterize it, links with the formal curriculum, logical sequence in the curriculum, organization of topics, balance between theoretical, practical and independent work hours, analysis of the non-personal components, methodological orientations, as well as the analysis of the bibliography are identified. The most relevant insufficiencies are oriented towards the need to reformulate the objectives, declare teaching methods, include hours for education at work, explain the methodological orientations and update the bibliography. Conclusions: the program responds to the social assignment of Cuban universities and its design is adjusted to contemporary curricular demands, but aspects that require attention for the sake of its improvement are identified.

Downregulation of eNOS and preserved endothelial function in endothelial-specific arginase 1-deficient mice.

Arginase 1 (Arg1) is a ubiquitous enzyme belonging to the urea cycle that catalyzes the conversion of l-arginine into l-ornithine and urea. In endothelial cells (ECs), Arg1 was proposed to limit the availability of l-arginine for the endothelial nitric oxide synthase (eNOS) and thereby reduce nitric oxide (NO) production, thus promoting endothelial dysfunction and vascular disease. The role of EC Arg1 under homeostatic conditions is in vivo less understood. The aim of this study was to investigate the role of EC Arg1 on the regulation of eNOS, vascular tone, and endothelial function under normal homeostatic conditions in vivo and ex vivo. By using a tamoxifen-inducible EC-specific gene-targeting approach, we generated EC Arg1 KO mice. Efficiency and specificity of the gene targeting strategy was demonstrated by DNA recombination and loss of Arg1 expression measured after tamoxifen treatment in EC only. In EC Arg1 KO mice we found a significant decrease in Arg1 expression in heart and lung ECs and in the aorta, however, vascular enzymatic activity was preserved likely due to the presence of high levels of Arg1 in smooth muscle cells. Moreover, we found a downregulation of eNOS expression in the aorta, and a fully preserved systemic l-arginine and NO bioavailability, as demonstrated by the levels of l-arginine, l-ornithine, and l-citrulline as well as nitrite, nitrate, and nitroso-species. Lung and liver tissues from EC Arg1 KO mice showed respectively increase or decrease in nitrosyl-heme species, indicating that the lack of endothelial Arg1 affects NO bioavailability in these organs. In addition, EC Arg1 KO mice showed fully preserved acetylcholine-mediated vascular relaxation in both conductance and resistant vessels but increased phenylephrine-induced vasoconstriction. Systolic, diastolic, and mean arterial pressure and cardiac performance in EC Arg1 KO mice were not different from the wild-type littermate controls. In conclusion, under normal homeostatic conditions, lack of EC Arg1 expression is associated with a down-regulation of eNOS expression but a preserved NO bioavailability and vascular endothelial function. These results suggest that a cross-talk exists between Arg1 and eNOS to control NO production in ECs, which depends on both L-Arg availability and EC Arg1-dependent eNOS expression.

Differentiation of industrial hemp strains by their cannabinoid and phenolic compounds using LC × LC-HRMS.

Cannabis is an ancient plant that has been used for therapeutic and recreational purposes. Nowadays, industrial hemp, a variety with low concentration of the psychoactive cannabinoid Δ9-tetrahydrocannabinol (THC) and high concentration of non-psychoactive cannabinoids, is getting more and more interest in the food, pharmaceutical, and cosmetic industry. However, cannabis not only contains cannabinoids as bioactive components but also other metabolites like terpenes and phenolic compounds, and the content of these interesting secondary metabolites greatly differs with the genetic variety of the plant. Due to the huge complexity of composition of the cannabis matrix, in this work, a comprehensive two-dimensional liquid chromatography (LC × LC) method has been developed as a very power separation technique coupling a pentafluorophenyl (PFP) and a C18 in the first and second dimensions. Two industrial hemp strains (cookie and gelato) were analyzed to determine the difference in their content of cannabinoids and phenolic compounds. To do this, a new demodulation process was applied for the first time to transform 2D raw data into 1D data which allowed carrying out the chemometric analysis needed to determine the statistical differences between the hemp strains. The cookie strain presented a total of 41 cannabinoid markers, while the gelato strain presented more representative phenolic compounds, in total 24 phenolic compounds were detected as potential markers of this sample. These differences in the chemical composition could determine the industrial destiny of the different hemp strains.

Hemp seeds: Nutritional value, associated bioactivities and the potential food applications in the Colombian context.

For many years, Colombia was one of the countries with the largest illegal cultivation of cannabis around the world. Currently, it is going through a period of transition with a new government law that recently allows the cultivation, transformation, and commercialization of such plant species. In this sense, the identification of strategies for the valorization of products or by-products from Cannabis sativa represent a great opportunity to improve the value chain of this crop. One of these products is hemp seeds, which are exceptionally nutritious and rich in healthy lipids (with high content of three polyunsaturated fatty acids: linoleic acid, alpha-linolenic acid, and gamma-linolenic acid), good quality protein, and several minerals. In addition, hemp seeds contain THC (tetrahydrocannabinol) or CBD (cannabidiol) in traces, molecules that are responsible for the psychoactive and therapeutic properties of cannabis. These low terpenophenolic contents make it more attractive for food applications. This fact, together with the constant search for proteins of vegetable origin and natural food ingredients, have aroused an important interest in the study of this biomass. Some bioactivities of phytochemical compounds (polyphenols and terpenoids, mainly) present in hemp seeds have provided antioxidant, antimicrobial, and anti-inflammatory properties. This review summarizes and discusses the context of hemp use in Latin-American and the new opportunities for hemp seeds culture in Colombia considering the valuable nutritional value, main functional bioactivities, and recent advances in food market applications of hemp seeds.

Comparative study for analysis of carbohydrates in biological samples.

This work presents a comparative study for the analysis of carbohydrates for four common chromatographic methods, each coupled to mass spectrometry. Supercritical fluid chromatography (SFC), hydrophilic interaction liquid chromatography (HILIC), reversed-phase liquid chromatography (RP-LC) and gas chromatography (GC) with detection by triple quadrupole mass spectrometer (QqQ-MS) are compared. It is shown that gas chromatography and reversed-phase liquid chromatography, each after derivatisation, are superior to the other two methods in terms of separation performance. Furthermore, comparing the different working modes of the mass spectrometer, it can be determined that a targeted analysis, i.e. moving from full scan to single ion monitoring (SIM) and multiple reaction monitoring (MRM), results in an improvement in the sensitivity as well as the repeatability of the method, which has deficiencies especially in the analysis using HILIC. Overall, RP-LC-MS in MRM after derivatisation with 1-phenyl-3-methyl-5-pyrazolone (PMP) proved to be the most suitable method in terms of separation performance, sensitivity and repeatability for the analysis of monosaccharides. Detection limits in the nanomolar range were achieved, which corresponds to a mass concentration in the low µg/L range. The applicability of this method to different biological samples was investigated with various herbal liquors, pectins and a human glycoprotein.

Epidemiología de pacientes ingresados con epistaxis en Otorrinolaringología. Hospital Carlos Manuel de Céspedes. 2013-2019 / Epidemiology of patients admitted with epistaxis in Otorhinolaryngology. Carlos Manuel de Céspedes Hospital. 2013-2019 / Epidemiologia dos pacientes admitidos com epistaxe pela Otorrinolaringologia. Hospital Carlos Manuel de Céspedes. 2013-2019

RESUMEN Introducción: la epistaxis es conocida desde la antigüedad. Es cuadro de gran relevancia en el ámbito ORL, siendo una de las urgencias más frecuentes de nuestra especialidad. Su etiología se presume multifactorial y clásicamente se ha dividido en local y sistémica, aunque en algunos casos no encontramos causa, denominándose epistaxis esencial o idiopática. Sin embargo, los datos epidemiológicos de los que disponemos en nuestro país y en nuestra provincia son escasos. Objetivo: describir las características epidemiológicas de pacientes ingresados con epistaxis y factores que se asocian con su aparición. Métodos: se realizó un estudio retrospectivo sobre los ingresos por epistaxis en el servicio de Otorrinolaringología del Hospital Carlos Manuel de Céspedes en el período de enero 2013 y diciembre 2019.Se analizó la distribución por sexo, edad, etiología y comorbilidad. Resultados: se valoraron 27 ingresos por epistaxis. El 55,56 % fueron hombres frente al 44,44 % de mujeres. En 48,15 % de los casos la epistaxis se asoció a Hipertensión arterial. El 74,07 % de los pacientes no requirieron nuevo taponamiento. Conclusiones: el patrón típico del paciente ingresado por epistaxis y con taponamiento anteroposterior, es preferiblemente varón que presenta alguna comorbilidad asociada que generalmente es Hipertensión arterial.

ABSTRACT Introduction: epistaxis has been known since ancient times. It is a highly relevant condition in the ENT field, being one of the most frequent emergencies in our specialty. Its etiology is presumed multifactorial and has classically been divided into local and systemic, although in some cases we found no cause, calling it essential or idiopathic epistaxis. However, the epidemiological data that we have in our country and in our province are scarce. Objective: to describe the epidemiological characteristics of patients admitted with epistaxis and factors associated with its appearance. Methods: a retrospective study was carried out on admissions for epistaxis in the Otorhinolaryngology service of the Carlos Manuel de Céspedes Hospital in the period of January 2013 and December 2019. The distribution by sex, age, etiology and comorbidity was analyzed. Results: 27 admissions for epistaxis were assessed. 55.56% were men compared to 44.44% of women. In 48.15% of the cases, epistaxis was associated with arterial hypertension. 74.07% of the patients did not require new tamponade. Conclusions: the typical pattern of the patient admitted for epistaxis and with anteroposterior tamponade, is preferably male who presents some associated comorbidity, which is generally arterial hypertension.

RESUMO Introdução: a epistaxe é conhecida desde a antiguidade. É uma condição de grande relevância na área de Otorrinolaringologia, sendo uma das emergências mais frequentes em nossa especialidade. Sua etiologia é presumida multifatorial e classicamente dividida em local e sistêmica, embora em alguns casos não tenhamos encontrado causa, denominando-a epistaxe essencial ou idiopática. No entanto, os dados epidemiológicos que temos em nosso país e em nossa província são escassos. Objetivo: descrever as características epidemiológicas dos pacientes admitidos com epistaxe e os fatores associados ao seu aparecimento. Métodos: foi realizado um estudo retrospectivo das internações por epistaxe no Serviço de Otorrinolaringologia do Hospital Carlos Manuel de Céspedes no período de janeiro de 2013 a dezembro de 2019. Foi analisada a distribuição por sexo, idade, etiologia e comorbidade. Resultados: foram avaliadas 27 internações por epistaxe. 55,56% eram homens contra 44,44% das mulheres. Em 48,15% dos casos, a epistaxe esteve associada à hipertensão arterial. 74,07% dos pacientes não necessitaram de novo tamponamento. Conclusões: o padrão típico do paciente admitido por epistaxe e com tamponamento ântero-posterior, é preferencialmente do sexo masculino e apresenta alguma comorbidade associada, geralmente hipertensão arterial.

Epidemiología de pacientes ingresados con epistaxis en Otorrinolaringología. Hospital Carlos Manuel de Céspedes. 2013-2019 / Epidemiology of patients admitted with epistaxis in Otorhinolaryngology. Carlos Manuel de Céspedes Hospital. 2013-2019

Introducción: la epistaxis es conocida desde la antigüedad. Es cuadro de gran relevancia en el ámbito ORL, siendo una de las urgencias más frecuentes de nuestra especialidad. Su etiología se presume multifactorial y clásicamente se ha dividido en local y sistémica, aunque en algunos casos no encontramos causa, denominándose epistaxis esencial o idiopática. Sin embargo, los datos epidemiológicos de los que disponemos en nuestro país y en nuestra provincia son escasos. Objetivo: describir las características epidemiológicas de pacientes ingresados con epistaxis y factores que se asocian con su aparición. Métodos: se realizó un estudio retrospectivo sobre los ingresos por epistaxis en el servicio de Otorrinolaringología del Hospital Carlos Manuel de Céspedes en el período de enero 2013 y diciembre 2019. Se analizó la distribución por sexo, edad, etiología y comorbilidad. Resultados: se valoraron 27 ingresos por epistaxis. El 55,56 por ciento fueron hombres frente al 44,44 por ciento de mujeres. En 48,15 por ciento de los casos la epistaxis se asoció a Hipertensión arterial. El 74,07 por ciento de los pacientes no requirieron nuevo taponamiento. Conclusiones: el patrón típico del paciente ingresado por epistaxis y con taponamiento anteroposterior, es preferiblemente varón que presenta alguna comorbilidad asociada que generalmente es Hipertensión arterial(AU)

Introduction: epistaxis has been known since ancient times. It is a highly relevant condition in the ENT field, being one of the most frequent emergencies in our specialty. Its etiology is presumed multifactorial and has classically been divided into local and systemic, although in some cases we found no cause, calling it essential or idiopathic epistaxis. However, the epidemiological data that we have in our country and in our province are scarce. Objective: to describe the epidemiological characteristics of patients admitted with epistaxis and factors associated with its appearance. Methods: a retrospective study was carried out on admissions for epistaxis in the Otorhinolaryngology service of the Carlos Manuel de Céspedes Hospital in the period of January 2013 and December 2019. The distribution by sex, age, etiology and comorbidity was analyzed. Results: 27 admissions for epistaxis were assessed. 55.56 percent were men compared to 44.44 percent of women. In 48.15 percent of the cases, epistaxis was associated with arterial hypertension. 74.07 percent of the patients did not require new tamponade. Conclusions: the typical pattern of the patient admitted for epistaxis and with anteroposterior tamponade, is preferably male who presents some associated comorbidity, which is generally arterial hypertension(EU)

Chemical characterization of eight herbal liqueurs by means of liquid chromatography coupled with ion mobility quadrupole time-of-flight mass spectrometry.

Herbal liqueurs are a large group of diverse alcoholic beverages with an ancient tradition produced by maceration of various herbs and spices and are commonly drunken before or after a meal to aid in the digestion because of their potential functional properties. In the presented work, eight different commercial herbal liqueurs were investigated with regard to their composition of phenolic compounds by liquid chromatography ion mobility quadrupole time-of-flight mass spectrometry (LC-IM-QTOF-MS). This multidimensional analytical platform uses all-ion fragmentation for a deep coverage of the foodome. After an extensive data clean-up, 3225 features were found. 213 features were manually annotated due to the absence of databases and software tools able to consider the drift time or Collison Cross Section (CCS) together with high resolution MS/MS spectra for identification. The identified compounds reflected the large variance between the investigated samples and a wealth of potential bioactive compounds that these liqueurs harbor.