Resumen: La presencia de bacterias coliformes en el agua presenta una amenaza potencial a la salud pública, ya que puede incrementar el riesgo de enfermedades infecciosas en la población más vulnerable. El asunto resulta más complicado cuando se desconoce la calidad fisicoquímica y microbiológica del agua que se consume. El presente estudio tiene la finalidad de evaluar el estado actual de la calidad de agua de consumo en tres Organizaciones Territoriales de Base (OTB’s) del Municipio de Vinto-Cochabamba y la relación de dependencia de los parámetros microbiológicos con las OTB’s. Los análisis de laboratorio de 30 muestras tomadas en los diferentes domicilios (10 muestras por OTB) muestran el cumplimiento de los límites máximos permisibles de los parámetros fisicoquímicos (pH, conductividad, alcalinidad y dureza) según la Norma Boliviana 512 (NB 512). Respecto a los parámetros microbiológicos para coliformes totales, de las 30 muestras analizadas solo 11 cumplieron con el límite máximo permisible, a diferencia del parámetro de coliformes termorresistentes, donde 25 de las 30 muestras cumplieron con el límite máximo permisible. Los parámetros microbiológicos fueron sometidos al análisis de chi-cuadrado, dando evidencia suficiente para afirmar con un 95% de confianza que los resultados de coliformes totales y termorresistentes no depende de la OTB (p=0.36). Al contrastar los resultados de agua de consumo domiciliario con la del agua suministrada, puede especularse que la contaminación de origen microbiológico ocurre ya sea en las tuberías de distribución, tanques domiciliarios y/o las prácticas de uso del agua de cada domicilio

Abstract:The presence of coliform bacteria in water presents a potential threat to public health, as it can increase the risk of infectious diseases in the most vulnerable population. The matter is more complicated when the physicochemical and microbiological quality of the water consumed is unknown. The purpose of this study is to evaluate the current state of the quality of drinking water in three Territorial Base Organizations (OTB’s) of the Municipality of Vinto-Cochabamba and the relationship of dependence of the microbiological parameters with the OTB’s. Laboratory analyzes of 30 samples taken from different homes (10 samples per OTB) show compliance with the maximum permissible limits of physicochemical parameters (pH, conductivity, alkalinity and hardness) according to Bolivian Standard 512 (NB 512). Regarding the microbiological parameters for total coliforms, of the 30 samples analyzed, only 11 met the maximum permissible limit, unlike the total coliform parameter, where 25 of the 30 samples met the maximum permissible limit. The microbiological parameters were subjected to chi-square analysis, providing sufficient evidence to affirm with 95% confidence that the results of total and heat-resistant coliforms do not depend on the OTB (p=0.36). By contrasting the results of household water consumption with that of water supplied, it can be speculated that contamination of microbiological origin occurs either in the distribution pipes, household tanks and/or the water use practices of each household.

ABSTRACT The contribution of plant residues throughout the sugarcane cycles favors the increase of organic matter and the activity of microorganisms in the soil, especially in the surface layers. Soil texture also has an important effect on ecological processes and soil quality. In this context, the objective of this study was to evaluate soil biological attributes in different sugarcane cultivation cycles under mechanized harvesting in an Oxisol in the Savanna region of Central Brazil. The study was conducted in commercial areas under sugarcane cultivation during the 2018/2019 season, which were considered homogeneous in terms of soil and climatic conditions, with the source of variation among the areas being the cultivation cycles (C1: one cultivation cycle; C3: three cultivation cycles; C7: seven cultivation cycles) and a savanna vegetation area selected as a reference. Microbiological variables were determined in two layers, 0-0.1 and 0.1-0.2 m. The variables related to microbial biomass and texture were subjected to principal component analysis. Areas with longer sugarcane cultivation cycles show higher proportion of microbial biomass carbon in the total organic carbon in subsurface layers (microbial quotient). The performance of the soil microbial community, as expressed by total organic carbon and microbial biomass nitrogen indicators, was associated with higher presence of clay and silt, i.e., soil particles smaller than 0.02 mm. quality context Brazil 20182019 2018 2019 2018/201 season conditions C1 C (C1 cycle C3 C7 reference 00.1 001 0 0.1 1 0-0. 0.10.2 0102 0.2 2 0.1-0. m analysis quotient. quotient . quotient) community indicators silt ie i e i.e. 002 02 0.0 mm 2018201 201 2018/20 (C 00 00. 01 0. 0-0 10 0.10. 010 0.1-0 i.e 201820 20 2018/2 0- 0.10 0.1- 20182 2018/

RESUMO O aporte de resíduos vegetais ao longo dos ciclos da cana-de-açúcar favorece o incremento de matéria orgânica e atividade de microrganismos no solo, especialmente nas camadas superficiais. A textura do solo também tem um efeito importante nos processos ecológicos e na qualidade do solo. Nesse sentido, o objetivo desta pesquisa foi avaliar atributos biológicos do solo em diferentes ciclos de cultivo de cana-de-açúcar sob colheita mecanizada, em um Latossolo da região de cerrado do Brasil Central. O estudo foi realizado em áreas comerciais de cultivo de cana-de-açúcar na safra 2018/2019, consideradas homogêneas em termos de condições edafoclimáticas, tendo como fonte de variação entre as áreas os ciclos de cultivo (C1: um ciclo de cultivo; C3: três ciclos de cultivo; C7: sete ciclos de cultivo) e uma área de vegetação de cerrado selecionada como referência. Foram determinadas variáveis microbiológicas nas camadas de 0-0,10 e 0,10-0,20 m. As variáveis relacionados à biomassa microbiana e textura foram submetidos à análise de componentes principais. Áreas com ciclos de cultivo de cana-de-açúcar mais longos apresentaram maior proporção de carbono da biomassa microbiana no carbono orgânico total nas camadas subterrâneas (quociente microbiano). O desempenho da comunidade microbiana do solo, expresso pelos indicadores carbono orgânico total e nitrogênio da biomassa microbiana foi associado à maior presença de argila e silte, ou seja, partículas de solo menores que 0,02 mm. canadeaçúcar cana açúcar superficiais sentido mecanizada Central 20182019 2018 2019 2018/2019 edafoclimáticas C1 C (C1 C3 C7 referência 00,10 0010 0 0,10 10 0-0,1 0,100,20 010020 0,20 20 0,10-0,2 m principais quociente microbiano. microbiano . microbiano) silte seja 002 02 0,0 mm 2018201 201 2018/201 (C 00 00,1 001 010 0,1 1 0-0, 100 0,100,2 01002 020 0,2 2 0,10-0, 0, 201820 2018/20 00, 01 0-0 0,100, 0100 0,10-0 20182 2018/2 0- 0,100 0,10- 2018/

Abstract Surveillance indicators of the quality of water for human consumption in the Amazon were analysed from 2016 to 2020 using 185,528 samples from 11 microregions. Of the samples analysed, 93.20% were from urban areas, 66.65% were from the public water supply system (WSS), 31.02% were from the Collective Alternative Solution-CAS, and 2.33% from the Individual Alternative Solution-IAS. There was an increase in the number of records by the WSS, with a downwards trend and fluctuations in records for the CAS and the IAS. The quality indicators of chemical and physical parameters for urban areas were higher than those for rural areas and traditional communities. Most of the samples presented pH values below the recommended level. In the quantification of microbiological parameters, a higher presence of total coliforms and E. coli was identified in samples from rural areas and in traditional communities. In conclusion, there were inadequacies in the chemical, physical and microbiological parameters as well as problems related to the supply, storage and surveillance of water distributed for human consumption. These findings indicate the need to build an agenda for public management to address water insecurity and its likely effects on food insecurity in the region. 201 202 185528 185 528 185,52 1 microregions 9320 93 20 93.20 6665 66 65 66.65 WSS , (WSS) 3102 31 02 31.02 SolutionCAS, SolutionCAS Solution CAS, Solution-CAS 233 2 33 2.33 SolutionIAS. SolutionIAS IAS Solution-IAS communities level E conclusion region 18552 18 52 185,5 932 9 93.2 666 6 66.6 (WSS 310 3 0 31.0 23 2.3 1855 5 185, 93. 66. 31. 2.

Resumo Analisaram-se indicadores de vigilância da qualidade da água para consumo humano no Amazonas, de 2016 a 2020, utilizando 185.528 amostras provenientes de 11 microrregiões. Das amostras analisadas, 93,20% são da área urbana, 66,65% provinham do sistema público (SAA), 31,02% da Solução Alternativa Coletiva (SAC) e 2,33% da Solução de Alternativa Individual (SAI). Observou-se aumento do número de registros pelo SAA, com tendência de queda e oscilações de registros para a SAC e a SAI. Os indicadores de qualidade dos parâmetros químicos e físicos da área urbana foram superiores aos das áreas rurais e de comunidades tradicionais. A maior parte das amostras apresentou valores de pH abaixo do recomendado. Na quantificação dos parâmetros microbiológicos, identificou-se maior presença de coliformes totais e E.coli na área rural e em comunidades tradicionais. Em conclusão, verificaram-se inadequações nos parâmetros químicos, físicos e microbiológicos, assim como problemas relativos ao abastecimento, armazenamento e à vigilância da água distribuída para consumo humano. Tais achados indicam a necessidade de construir uma agenda, pela gestão pública, para o enfrentamento da insegurança hídrica e seus prováveis efeitos sobre a insegurança alimentar existente na região. Analisaramse Analisaram se Amazonas 201 2020 185528 185 528 185.52 1 microrregiões analisadas 9320 93 20 93,20 6665 66 65 66,65 SAA , (SAA) 3102 31 02 31,02 (SAC 233 2 33 2,33 SAI . (SAI) Observouse Observou tradicionais recomendado microbiológicos identificouse identificou Ecoli E coli conclusão verificaramse verificaram abastecimento agenda pública região 202 18552 18 52 185.5 932 9 93,2 666 6 66,6 (SAA 310 3 0 31,0 23 2,3 (SAI 1855 5 185. 93, 66, 31, 2,

ABSTRACT: The aim of this study is the determination some quality parameters of grape and mulberry pestils (leathers) sold in Elazig. For this purpose, a total of 45 fruit pestil samples, of which 23 were grape pestils and 22 were mulberry pestils, were analyzed for their physical properties, chemical properties, and microbiological characteristics. In grape and mulberry pestils, the average L* (lightness/darkness) values were 42.72 and 44.81, a* (redness) values were 10.29 and 9.07, and b* (yellow) values were 20.90 and 20.90, respectively. In grape and mulberry fruit pestil samples, the thickness values were 1.62 and 1.34, pH values were 3.82 and 4.75, acidity values (as citric acid) were 0.63 and 0.22%, aw values were 0.602 and 0.627, dry matter values were 68.78% and 72.99 %, ash values were 2.25% and 0.64%, insoluble ash values in 10% HCl were 0.20 and 0.29, and Brix values were 18.83 and 19.36, respectively. TMAB, coliform, Staphylococcus-Micrococcus, and yeast-mold counts were found to be 4.72 and 4.48, 1.30 and 1.89, 2.11 and 2.12, and 2.04 and 2.11 log10 cfu/g, respectively, in all samples examined. In 14 of the samples (31.11%), the total number of mesophilic aerobic microorganisms was found to be >5 log10 cfu/g. Escherichia coli and Salmonella spp. were not found in any of the samples. However, the samples were found to contain significant levels of yeast-mold. There was no difference between the groups in microbiological terms in statistical analysis (P > 0.05). According to the current study, there was no standard production and not enough hygiene rules were observed in the pestil production process in family businesses in Elazig. On the other hand, essential information was obtained on some physical, chemical and microbiological quality parameters of grape and blackberry pulps sold in markets and stores in Elazig. ABSTRACT leathers (leathers Elazig purpose 4 2 properties characteristics L lightness/darkness lightnessdarkness lightness darkness (lightness/darkness 4272 42 72 42.7 4481 44 81 44.81 redness (redness 1029 10 29 10.2 907 9 07 9.07 b yellow (yellow 2090 20 90 20.9 respectively 162 1 62 1.6 134 34 1.34 382 3 82 3.8 475 75 4.75 as acid 063 0 63 0.6 022 0.22% 0602 602 0.60 0627 627 0.627 6878 68 78 68.78 7299 99 72.9 % 225 25 2.25 064 64 0.64% 020 0.2 029 0.29 1883 18 83 18.8 1936 19 36 19.36 TMAB coliform StaphylococcusMicrococcus, StaphylococcusMicrococcus Staphylococcus Micrococcus, Micrococcus Staphylococcus-Micrococcus yeastmold yeast mold 472 4.7 448 48 4.48 130 30 1.3 189 89 1.89 211 11 2.1 212 12 2.12 204 04 2.0 log log1 cfug cfu g cfu/g examined 31.11%, 3111 31.11% , 31 (31.11%) 5 spp However yeastmold. mold. P 0.05. 005 0.05 . 05 0.05) hand 427 7 42. 8 44.8 102 10. 9.0 209 20. 16 6 1. 13 38 3. 47 06 0. 02 0.22 060 60 062 0.62 687 68.7 729 72. 2.2 0.64 188 18. 193 19.3 4. 4.4 1.8 21 2. 311 31.11 (31.11% 00 0.0 44. 9. 68. 19. 31.1 (31.11 31. (31.1 (31. (31 (3 (

RESUMO: O objetivo deste estudo é a determinação de alguns parâmetros de qualidade de pestilos de uva e amoreira (couros) vendidos em Elazig. Para tanto, um total de 45 amostras de pestil de frutas, sendo 23 de uva e 22 de amoreira, foram analisadas quanto às suas propriedades físicas, químicas e microbiológicas. Em pestils de uva e amoreira, os valores médios de L* (claridade/escuridão) foram 42.72 e 44.81, os valores de a* (vermelhidão) foram 10.29 e 9.07, e os valores de b* (amarelo) foram 20.90 e 20.90, respectivamente. Nas amostras de pestil de uva e amoreira, os valores de espessura foram 1.62 e 1.34, os valores de pH foram 3.82 e 4.75, os valores de acidez (como ácido cítrico) foram 0.63 e 0.22%, os valores de aw foram 0,602 e 0.627, os valores de matéria seca foram 68.78% e 72.99%, os valores de cinzas foram 2.25% e 0.64%, os valores de cinzas insolúveis em HCl a 10% foram 0.20 e 0.29, e os valores Brix foram 18.83 e 19.36, respectivamente. As contagens de TMAB, coliformes, Staphylococcus-Micrococcus e fungos de levedura foram 4.72 e 4.48, 1.30 e 1.89, 2.11 e 2.12 e 2.04 e 2.11 log10 ufc/g, respectivamente, em todas as amostras examinadas. Em 14 das amostras (31.11%), o número total de microrganismos aeróbios mesófilos foi >5 log10 ufc/g. Escherichia coli e Salmonella spp. não foram encontrados em nenhuma das amostras. No entanto, verificou-se que as amostras continham níveis significativos de bolor de levedura. Não houve diferença entre os grupos em termos microbiológicos na análise estatística (P > 0,05). De acordo com o estudo atual, não houve produção padrão e não foram observadas regras de higiene suficientes no processo de produção de pestil em empresas familiares em Elazig. Por outro lado, foram obtidas informações essenciais sobre alguns parâmetros físicos, químicos e microbiológicos de qualidade das polpas de uva e amora-preta comercializadas em mercados e lojas de Elazig. RESUMO couros (couros Elazig tanto 4 frutas 2 físicas microbiológicas L claridade/escuridão claridadeescuridão claridade escuridão (claridade/escuridão 4272 42 72 42.7 4481 44 81 44.81 vermelhidão (vermelhidão 1029 10 29 10.2 907 9 07 9.07 b amarelo (amarelo 2090 20 90 20.9 respectivamente 162 1 62 1.6 134 34 1.34 382 3 82 3.8 475 75 4.75 como cítrico 063 0 63 0.6 022 0.22% 0602 602 0,60 0627 627 0.627 6878 68 78 68.78 7299 99 72.99% 225 25 2.25 064 64 0.64% 020 0.2 029 0.29 1883 18 83 18.8 1936 19 36 19.36 TMAB coliformes StaphylococcusMicrococcus Staphylococcus Micrococcus 472 4.7 448 48 4.48 130 30 1.3 189 89 1.89 211 11 2.1 212 12 204 04 2.0 log log1 ufcg ufc g ufc/g examinadas 31.11%, 3111 31.11% , 31 (31.11%) 5 spp entanto verificouse verificou se P 0,05. 005 0,05 . 05 0,05) atual lado físicos amorapreta amora preta 427 7 42. 8 44.8 102 10. 9.0 209 20. 16 6 1. 13 38 3. 47 06 0. 02 0.22 060 60 0,6 062 0.62 687 68.7 729 72.99 2.2 0.64 188 18. 193 19.3 4. 4.4 1.8 21 2. 311 31.11 (31.11% 00 0,0 44. 9. 0, 68. 72.9 19. 31.1 (31.11 72. 31. (31.1 (31. (31 (3 (

ABSTRACT In the food industry, hygiene is a key condition to ensure food safety. That is why this work aimed to describe the visual, microbiological and bioluminescence methods used by food industries to verify sanitation procedures. The methodology was based on the review of the literature in the databases of Google Scholar, Scielo, Latindex, Dialnet, Redalyc and in food regulatory entities. The results showed that the food industries use the different cleaning and disinfection verification methods, either separately or jointly, to achieve compliance with the standards established by the reference regulations. In conclusion, the method used to verify the sanitation procedure resulted from the size of the company, the nature of the food, the processes applied and a series of factors that define the very identity of the industry, to guarantee quality. and food safety.

RESUMEN En la industria alimentaria, la higiene es una condición clave para asegurar la inocuidad de los alimentos. Es por ello, que este trabajo tuvo como objetivo describir sobre los métodos visual, microbiológico y de bioluminiscencia utilizados por las industrias de alimentos para la verificación de los procedimientos de saneado. La metodología se basó en la revisión de la literatura en las bases de datos de Google Académico, Scielo, Latindex, Dialnet, Redalyc y en entes reguladores de alimentos. Los resultados demostraron que las industrias de alimentos utilizan los diferentes métodos de verificación de limpieza y desinfección, ya sea de manera separada o conjunta para lograr cumplir con los estándares establecidos por las normativas de referencia. En conclusión, el método utilizado para la verificación del procedimiento de saneado dependerá de la envergadura de la empresa, la naturaleza del alimento, los procesos aplicados y de una serie de factores que definen la misma identidad de la industria, a fin de garantizar la calidad e inocuidad de los alimentos.

Abstract: In order to evaluate the physicochemical and microbiological composition of functional beverages obtained from chayote pulp (Sechium edule) with L-carnitine. A randomized design with four replicates per treatment was used to evaluate chemical (dry matter, crude protein, ethereal extract, fiber, and ash), physical (pH, °Brix, acidity), and microbiological (mesophilic aerobes and molds and yeasts) parameters. The treatments studied were: V1, Chayote 100% plus 500 mg of L-carnitine; V2, Chayote 75% + 500 mg of L-carnitine and 25% of distilled water; V3, Chayote 75% + 250 mg of L-carnitine and 25% of distilled water; V4, Chayote 50% + 500 mg of L-carnitine and 50% of distilled water; V5, Chayote 50% + 250 mg of L-carnitine and 50% of distilled water. The pH values at V3 gradually decreased until day 21. Crude protein and ash differed (p<0.05) in V1 and V2 compared to the other treatments. While dry matter, ethereal, and nitrogen-free extract did not differ between the variants, mesophilic aerobes, molds, and yeasts were within the ranges (<3) of acceptance according to NTE INEN 1529-6 standards. Treatment V3 showed the highest pH reduction (5.09) compared to other variants after 21 days of storage. It is concluded that including different amounts of chayote pulp with L-carnitine is a suitable alternative to obtain functional beverages for human consumption.

Resumen: Con el objetivo de evaluar la composición fisicoquímica y microbiológica de las bebidas funcionales obtenidas a partir pulpa de chayote (Sechium edule) con L-Carnitina, se empleó un diseño completamente aleatorizado con cuatro repeticiones por tratamiento se evaluaron parámetros químicos (materia seca, proteína cruda, extracto eterio, fibra y ceniza), físicos (pH, °Brix, acidez) y microbiológicos (aerobios mesófilos y mohos y levaduras). Los tratamientos estudiados fueron: V1, Chayote 100 % más 500 mg de L-carnitina; V2, Chayote 75% + 500 mg L-Carnitina y 25% agua destilada; V3, chayote 75% +250 mg L-Carnitina y 25% agua destilada; V4, Chayote 50% + 500 mg L-Carnitina y 50% agua destilada; V5, Chayote 50% + 250 mg L-Carnitina y 50% agua destilada. Los valores de pH en el V3 se redujeron gradualmente hasta el día 21. La proteína cruda y ceniza difirieron (p<0.05) en los V1 y V2 frente a los demás. Mientras que la materia seca, extracto etéreo y extracto libre de nitrógeno, no presentaron diferencia entre variantes. Los aerobios mesófilos, mohos y levaduras estuvieron dentro los rangos (<3) de aceptación según las normas NTE INEN 1529-6. El tratamiento V3 fue el que presentó mayor reducción de pH (5,09) con frente a otras variantes a los 21dias de conservado. Se concluye, que la inclusión de diferentes cantidades de pulpa de chayote con L-Carnitina es una alternativa apropiada para obtener bebidas funcionales aptos para consumo humano.

Abstract Introduction: Preterm birth, before 37 weeks of gestation, is the main determinant of neonatal morbidity and mortality and is associated with serious consequences,including compromised quality of life for the affected individual and physical, psychological, and economic costs. Objective: To evaluate the correlation of obstetric history, cervicovaginal infections, and cervical length with preterm birth. A prospective, blind cohort study evaluated 1,370 pregnant women from Ribeirão Preto between 20 and 25 weeks of gestation. Materials and methods: The correlation between obstetric history, cervical length, and gestational age at birth was obtained by calculating the relative risk of the different variables. Results: The distribution of pregnant women according to cervical length (CL) showed a predominance of women with a cervix longer than 2.5 cm (n = 1,308, 95.8%), followed by women with a cervix between 2 and 2.49 cm (n = 42, 3.1%) and < 2 cm (n = 15, 1.1%). Among the 1,370 pregnant women evaluated, 133 had spontaneous preterm birth (< 259 days); 14 (10.5%) preterm births occurred in women under 19 years of age, 105 (79%) in women between 19 and 35 years, and 14 (10.5%) in women older than 35 years. Microbiological analysis showed the growth of Mycoplasma hominis, Ureaplasma urealyticum, and other bacteria in 8, 17, and 16 women with preterm birth, respectively. Among the 133 women with spontaneous preterm birth, CL was < 2.5 cm in 15 women, < 2 cm in 3, < 1.5 cm in 3, and < 1 cm in 2. Conclusion: The identification of pregnant women at high risk for preterm delivery can reduce the incidence of preterm birth. Although no gold standard test exists for the prediction of preterm birth, this study confirms that the measurement of CL is a good individual predictor.

Resumen Este estudio tuvo como objetivo evaluar efectos de prebióticos (jarabe de topinambur e inulina comercial) sobre las características de bebidas de almendras Prunus dulcisvar “Non Pareil”, inoculadas con probióticos (Streptococcus salivarius subsp. thermophilus y Lactobacillus delbrueckii subsp. bulgaricus). El contenido de inulina obtenido en jarabe de topinambur fue de 2,25 gramos de inulina por 100 gramos de fructanos totales, en la muestra a 7°Bx. Se evaluaron las propiedades fisicoquímicas, microbiológicas y sensoriales de los productos fermentados durante el almacenamiento en frío (4°C) por unperíodo de 28 días. Las bebidas adicionadas con jarabe de topinambur mostraron mayor acidez (valores menores de pH y contenidosmayores de ácido láctico) y mayores densidades que el producto elaborado con inulina comercial. La adición de jarabe de topinambur afectó los parámetros de textura, los productos mostraron menor dureza, adhesividad, gomosidad y mayores valores de cohesión y elasticidad que los elaborados con inulina comercial. La muestra con mayor preferencia sensorial fue la preparada con inulina comercial y bebida vegetal filtrada. La concentración de bacterias lácticas se mantuvo mayor en las muestras con jarabe de topinambur con la misma proporción de inulina que las muestras con prebiótico comercial, después de 21 días de almacenamiento en refrigeración.

Abstract This study aimed to evaluate the effect of prebiotics (Jerusalem artichoke syrup and commercial inulin) on the characteristics of Prunus dulcis var “Non Pareil”almond beverages, inoculated with probiotics (Streptococcus salivarius subsp. thermophilus and Lactobacillus delbrueckii subsp. bulgaricus). The inulin content obtained in the Jerusalem artichoke syrup was 2.25 grams of inulin per 100 grams of total fructans, in the sample at 7°Bx. The fermented products were evaluated for physicochemical, microbiological and sensory properties during cold storage (4°C) for 28 days. The fermented beverages with the addition of Jerusalem artichoke syrup showed higher acidity (lower pH value and higher lactic acid content), and higher density than the product made with commercial inulin. The addition of Jerusalem artichoke syrup affected the textural parameters. The products showed less hardness, stickiness, gumminess and higher values of cohesiveness and elasticity than those made with commercial inulin. The sample with the highest sensory preference was the one prepared with commercial inulin and a filtered vegetable beverage. The concentration of lactic bacteria remained higher in the samples with Jerusalem artichoke syrup with the same proportion of inulin than the samples with commercial prebiotic, during 21 days of storage under refrigeration.

Resumen Kombucha es una biopelícula compuesta por un cultivo simbiótico de bacterias y levaduras, conocido como SCOBY (Symbiotic Culture of Bacteria and Yeast). El SCOBY sufre procesos de deterioro y pérdida de atributos nutricionales, bioactivos y sensoriales, lo que impacta negativamente en su vida útil. Estas pérdidas pueden evitarse mediante métodos de secado, que ayudan a prolongar la vida útil y conservar los compuestos de acción de sus constituyentes. El objetivo de este estudio fue someter y evaluar Kombucha SCOBY a las técnicas de deshidratación por calor y liofilización. Los análisis incluyeron pH, sólidos solubles totales, acidez titulable total, turbidez, contenido de compuestos fenólicos totales, actividad antioxidante, evaluación microbiológica y pruebas de toxicidad in vivo. Todos los análisis fueron evaluados estadísticamente a un nivel de probabilidad del 5%, utilizando el software SAS. Tanto las bebidas de Kombucha como los productos secos exhibieron cantidades considerables de compuestos fenólicos y actividad antioxidante. Los recuentos de microorganismos oscilaron entre 104 y 108 CFU.ml-1 para bebidas y productos desarrollados. En las pruebas in vivo con Caenorhabditis elegans, no se observó un aumento en la mortalidad y los gusanos alimentados con los productos fermentados mostraron un mayor crecimiento. Por lo tanto, este estudio concluye que la producción de formas deshidratadas y liofilizadas de productos a base de Kombucha es un campo de investigación prometedor y ventajoso para la salud humana.

Abstract Kombucha is a biofilm composed of a symbiotic culture of bacteria and yeast, known as SCOBY (Symbiotic Culture of Bacteria and Yeast). The SCOBY undergoes deterioration processes and loss of nutritional, bioactive and sensory attributes, which negatively impacts its shelf life. These losses can be avoided by drying methods, which help to extend shelf life and preserve the action compounds of its constituents. The objective of this study was to subject and evaluate Kombucha SCOBY to drying techniques by heat dehydration and freeze-drying. Analyses included pH, total soluble solids, total titratable acidity, turbidity, total phenolic compound content, antioxidant activity, microbiological assessment, and toxicity in vivo testing. All analyses were statistically evaluated at a 5% probability level, using SAS software. Both Kombucha beverages and dry products exhibited considerable amounts of phenolic compounds and antioxidant activity. Microorganism counts ranged from 104 to 108 CFU.ml-1 for developed beverages and products. In In vivo tests with Caenorhabditis elegans, no increase in mortality was observed, and worms fed with the fermented products showed enhanced growth. Thus, this study concludes that producing dehydrated and freeze-dried forms of Kombucha-based products is a promising and advantageous field of researchfor human health.

Abstract The effect of using alpaca milk on the physicochemical, composition, microbiological and sensory attributes of artisanal whipped yogurt with different alpaca and cow milk formulations was evaluated. The pasteurized process methodology to obtain seven formulations of yogurt with alpaca milk was subjected to physicochemical, composition, microbiological and sensory quality analysis with the following results: The physicochemical quality of yogurt made with different proportions of alpaca milk was favorable for the stability of the yogurt, also denoting a greater richness of total solids in its useful life period of consumption. The composition of yogurts with a different proportion of alpaca milk increases the nutritional components of yogurt, enriching it with natural nutrients, improving the quality of yogurt and promoting it as a “concentrated fermented milk.” The microbiological quality of yogurts made with various proportional parts of alpaca milk appears acceptable for consumption of yogurt according to the Peruvian Technical Standards for milk and dairy derivatives, given the absence of pathogenic microorganisms, minimal presentation of fungi and yeasts and presence initial acid lactobacilli, which inhibit bacterial growth and reduce bacterial presence at the time of final ripening of the yogurt. Finally, the sensory quality of the yogurts prepared with partial use of alpaca milk demonstrated to have good flavor, aroma and smell characteristics, mainly in those whose formulation uses majority proportions of alpaca milk, giving rise to products with acceptable tastes for the consumer.

Resumen Se evaluó el efecto del uso de leche de alpaca sobre los atributos fisicoquímicos, composición, microbiológico y sensorial del yogur batido artesanal con diferente formulación de leche de alpaca y vaca. La metodología de proceso pasteurizado para obtener siete formulaciones de yogurt con leche de alpaca, fueron sometidos al análisis fisicoquímico, composición, microbiológico y de calidad sensorial con resultados siguientes: La calidad fisicoquímica del yogurt elaborado con proporciones distintas de leche de alpaca resulto favorable para la estabilidad del yogurt, denotando también una mayor riqueza de solidos totales en su periodo de vida útil de consumo. La composición de los yogures con diversa proporción de leche de alpaca aumenta los componentes nutritivos del yogurt, enriqueciéndolo con nutrientes naturales, mejorando la calidad del yogurt y promoviéndola, como una “leche fermentada concentrada”. La calidad microbiológica de los yogures elaborados con partes proporcionales diversas de leche de alpaca, aparece aceptable para el consumo del yogurt según las Normas Técnicas Peruanas para la leche y derivados lácteos, dada la ausencia de microorganismos patógenos, mínima presentación de hongos y levaduras y presencia inicial de lactobacilos ácidos, que inhiben el crecimiento bacteriano y disminuyen presencia bacteriana al momento de maduración final del yogurt. Finalmente, la calidad sensorial de los yogures preparados con uso parcial de leche de alpaca demostró tener buenas características de sabor aroma y olor, principalmente en aquellos cuya formulación hace uso de proporciones mayoritarias de leche de alpaca, dando lugar a productos de gustos aceptables para el consumo.

ABSTRACT Due to the diversification of dairy products developed in the state of Falcón, the introduction of a fermented dairy product derived from yogurt combined with Aloe vera gel, a traditional crop of the region, is novel due to its nutritional properties and health benefits. The objective of this research was to evaluate the quality of a dairy drink with fermented aloe according to current regulations. Important authors such as Tamime and Robinson 1, Morillo and Toyo 2, Méndez and Romero 3 were taken as references. Product elaboration runs were carried out on a laboratory scale, in order to establish the adequate proportions of the fruity Aloe gel by mixing fruit pulp, sugar and Aloe gel, the most accepted being the 1:1:1 ratio. The physicochemical and microbiological characterization of the raw material and the finished product was carried out using the COVENIN standards and organoleptic tests to untrained judges to ensure the acceptance of the product, from which a fermented milk drink was obtained with the addition of 50 % gel of Fruity Aloe with a pH of 4,51; a titratable acidity of 0,837 % lactic acid; 3,64 % fat and 12,92 % non-fat solids. Regarding the microbiological quality, few yeasts and the absence of coliform bacteria were found, which complies with the physicochemical and microbiological requirements demanded by the regulations, allowing the obtaining of a quality product suitable for human consumption based on natural raw materials.

RESUMEN Debido a la diversificación de los productos de origen lácteo desarrollados en el estado Falcón, la introducción de un producto lácteo fermentado derivado del yogurt combinado con gel de Aloe vera, cultivo tradicional de la región, es novedoso por sus propiedades alimenticias y beneficios a la salud. Esta investigación tuvo como objetivo evaluar la calidad de una bebida láctea fermentada con gel de Aloe frutado según la normativa vigente. Se tomaron como referencias importantes autores como Tamime y Robinson, (1) Morillo y Toyo, (2) Méndez y Romero. (3) Se realizaron corridas de elaboración del producto a escala de laboratorio, a fin de establecer las proporciones adecuadas del gel de Aloe frutado mezclando pulpa de fruta, azúcar y gel de Aloe, siendo la más aceptada la proporción 1:1:1. Se realizó la caracterización fisicoquímica y microbiológica de la materia prima y del producto terminado mediante las normas COVENIN y pruebas organolépticas a 10 jueces no entrenados para asegurar la aceptación del producto, de donde se obtuvo una bebida láctea fermentada con la adición de 50 % de gel de Aloe frutado con un pH de 4,51; una acidez titulable de 0,837 % de ácido láctico; 3,64 % de grasa y 12,92 % de sólidos no grasos. Respecto a la calidad microbiológica se encontraron levaduras escasas y ausencia de bacterias coliformes, con lo cual se cumple con los requisitos fisicoquímicos y microbiológicos exigidos por la normativa, permitiendo la obtención de un producto de calidad apto para el consumo humano a base de materias primas naturales.

ABSTRACT: The goal of the research was to re-evaluate the yeast (Saccharomyces cerevisiae) from the brewing process to obtain liquid organic fertilizer. The experiment was conducted in two stages: in the field by collecting raw material; and, in the laboratory by determining the moisture percentage and the microbiological, physicochemical, and agronomic analyses. A complete randomized design (CRD) with a 4x4 factorial arrangement with three replications was performed. The yeast characterization was pH: 6.52, EC: 3.60 dS/m; relative RH: 84.94%; and, organic matter in solution: 66.64%; while, the liquid organic fertilizer characterization was pH: 3.96; EC: 21.40 dS/m; total solids: 183.30 g/L; and, organic matter in solution: 146.40 g/L. Lactic acid fermentation carried out by lactic acid bacteria of the microbial consortium (B-lac) is an option for producing liquid organic fertilizer using residual yeast from the brewing process. Through yeast characterization, it was shown that the concentration of organic matter, macronutrient and micronutrient content of the residual yeast is high in certain elements, such as nitrogen (9681 mg/L), phosphorus (2203.70 mg/L), and potassium (3850 mg/L), resulting in a product of agronomic quality.

RESUMEN: El objetivo del estudio fue revalorar la levadura (Saccharomyces cerevisiae), del proceso de elaboración de cerveza, para obtener fertilizante orgánico líquido. El experimento se realizó en dos etapas: en campo, la recolección de materia prima y en el laboratorio, la determinación del porcentaje de humedad y los análisis microbiológicos, fisicoquímicos y agronómicos. Se utilizó un diseño completo al azar (DCA) con arreglo factorial de 4x4 con tres repeticiones. La caracterización de la levadura fue pH: 6,52, CE: 3,60 dS/m, HR relativa: 84,94% y materia orgánica en solución: 66,64%. Mientras que, la caracterización del fertilizante orgánico líquido estuvo en un pH: 3,96, CE: 21,40 dS/m, sólidos totales: 183,30 g/L y materia orgánica en solución: 146,40 g/L. La fermentación láctica realizada por las bacterias ácido-lácticas del consorcio microbiano (B-lac), es una opción para la producción de fertilizante orgánico líquido utilizando levadura residual del proceso de elaboración de cerveza. Mediante la caracterización de levadura, se demostró que la concentración de materia orgánica, el contenido de macronutrientes y micronutrientes de la levadura residual es alto en determinados elementos, tales como; nitrógeno (9681 mg/L), fósforo (2203,70 mg/L) y potasio (3850 mg/L); resultando ser un producto de calidad agronómica.

RESUMEN Objetivo: El propósito del artículo es describir la concepción sistémica que representa la lógica del proceso de formación de la competencia gestión personal del conocimiento microbiológico en estudiantes de la Licenciatura en Educación Biología. Métodos: En la investigación la modelación permitió configurar la concepción sistémica del objeto. Además, el método sistémico-estructural-funcional fue utilizado para el análisis integral del objeto, al determinar estructura, funciones y relaciones jerárquicas entre los componentes del proceso. También se emplearon métodos del nivel teórico como: analítico-sintético e inductivo-deductivo. Resultado: El aporte se vincula al proceso de formación de la competencia gestión personal del conocimiento microbiológico en estudiantes de la Licenciatura en Educación Biología y se materializa a partir de las relaciones de coordinación y complementariedad que se establecen entre la aprehensión del conocimiento microbiológico, la movilización de métodos para la gestión personal del conocimiento microbiológico y su contextualización formativa. Conclusión: La concepción sistémica que representa la lógica de la gestión personal del conocimiento microbiológico puede favorecer la integralidad en el desempeño gestión personal del conocimiento microbiológico en correspondencia con la dinámica de los problemas de la profesión en estudiantes de la Licenciatura en Educación Biología.

ABSTRACT Objective: This article aims at describing a systemic understanding that represents the logic of the process of educating information seeking and processing competencies in biology teacher trainees. Methods: Modeling makes possible to devise a model for competency-based education related to individual seeking and processing of microbiology information. The systemic-structural-functional method was used to achieve a comprehensive understanding of the researched object; that is to describe its structure, functions and hierarchical relationships of the constituent elements. Theoretical level methods such as: analytical-synthetic and inductive-deductive were also used. Result: The contribution is linked to the process of educating information seeking and processing competencies for microbiology self-management. This may be accomplished by relating the processes of apprehending microbiological knowledge, mobilizing self-management information procedures and contextualizing competency-based education. Conclusion: The resulting systemic conception that represents the logic of personal management of microbiological knowledge may favor comprehensiveness in the performance of personal management of microbiological knowledge in correspondence with the dynamics of the problems of the profession in students of the Bachelor's Degree in Biology Education.

Abstract This study aimed to evaluate whether bacterial inoculation improves the fermentative, microbiological, and chemical characteristics of silages of the elephant grass cv. BRS Capiaçu on different regrowth days. The experimental design was completely randomized and set up in a 3x2 factorial arrangement (three regrowth days, with and without inoculant), with four replications. There was a significant interaction between the regrowth days and inoculant on the pH, ammoniacal nitrogen (N-NH3), and effluent losses (EL) of the silages. Inoculation decreased the EL with the advance of regrowth days and increased the dry matter recovery index compared to the silages without inoculant. The population of molds and yeasts decreased when inoculation was adopted to the forage harvested after 85 d. There was a significant interaction between the dry matter (DM), crude protein (CP) and neutral detergent fiber corrected for ash and protein (NDFap) contents of the silages. Inoculation in the grass harvested after 85 d increased the DM contents of the silage. The highest CP contents were observed in the silages after 85 d. The NDFap contents of the grasses harvested after 110 and 135 d were higher than those of the grass harvested after 85 d. The NDFap contents of the silages without inoculant increased with the harvest age. The BRS Capiaçu forage silage harvested at 110 d demonstrated favorable performance for silage production. However, the influence of inoculant use was low for the characteristics evaluated.

Resumen Este estudio tuvo como objetivo evaluar si la inoculación bacteriana mejora las características fermentativas, microbiológicas y químicas de los ensilados del pasto elefante cv. BRS Capiaçu en diferentes días de rebrote. El diseño experimental fue completamente al azar y se estableció en un arreglo factorial 3x2 (tres días de rebrote, con y sin inoculante), con cuatro repeticiones. Hubo una interacción significativa entre los días de rebrote y el inoculante sobre el pH, el nitrógeno amoniacal (N-NH3) y las pérdidas por efluentes (PE) de los ensilados. La inoculación disminuyó la PE con el avance de los días de rebrote y aumentó la tasa de recuperación de materia seca en comparación con los ensilados sin inoculante. La población de mohos y levaduras disminuyó cuando se adoptó la inoculación al forraje cosechado después de 85 d. Hubo una interacción significativa entre la materia seca (MS), la proteína cruda (PC) y la fibra detergente neutro corregida por los contenidos de cenizas y proteína (FDNcp) de los ensilados. La inoculación en el pasto cosechado después de 85 días aumentó el contenido de MS del ensilado. Los mayores contenidos de PC se observaron en los ensilados después de 85 días. Los contenidos de FDNcp de los pastos cosechados después de 110 y 135 días fueron mayores que el del pasto cosechado después de 85 días. El contenido de FDNcp de los ensilados sin inoculante aumentó con la edad de cosecha. El ensilado de forraje de BRS Capiaçu cosechado a los 110 días demostró un desempeño favorable para la producción de ensilado. Sin embargo, la influencia del uso de inoculantes fue baja para las características evaluadas.

Biologically active compounds in most spices possess antimicrobial and other important biomedical properties. There have been huge demands for natural immunity boosters (spices and herbs), considering the recent global pandemic and challenges relating to drug-resistant pathogens. This study was designed to compare the efficacy of ginger, garlic and turmeric spices against some pathogenic microorganisms. Aqueous extraction of spices, antimicrobial sensitivity and minimum inhibitory concentration tests were done using standard microbiological methods. Bioactive compounds were estimated using the gas chromatography-mass spectrometry (GC-MS) method. Aqueous extracts of ginger inhibited the growth of all test isolates except Streptococcus pneumoniae, with inhibition zones ranging between 0.9 mm and 13.5 mm. Escherichia coli, S. pneumoniae and Haemophilus influenzae were resistant to turmeric extracts, while the extract of garlic inhibited only four of the test pathogens. Inhibition zones for turmeric ranged between 4.4 mm and 10.9 mm, while those for garlic were between 4.7 mm and 11.5 mm. All the spice extracts did not inhibit microbial growth at 10-40%. An antibiotic spectrum indicated that Bacillus sp. was resistant to all but one, nitrofurantoin, which also inhibited the growth of almost all pathogens, except H. influenzae, with zones ranging between 10.5 mm and 11.6 mm. All test pathogens were resistant to cloxacillin except E. coli (10.6 mm). The major phyto-active compounds present in ginger are 2-Butanone,4-(4-hydroxy-3-methoxyphenyl), 1,3-Cyclohexadiene and 1-(4-Hydroxy-3-methoxyphenyl). SIGNIFICANCE: Conclusively, ginger, turmeric and garlic have varied inhibitory activities against diverse organisms, indicating their antimicrobial properties; however, ginger showed a higher inhibitory effect and more diverse antimicrobial property amongst selected isolates. Furthermore, certain bioactive compounds of biomedical importance were present. We therefore recommend the use of these spices as alternative natural food preservatives against spoilage organisms, as well as potential natural sources for bioactive compounds in drug development against pathogens.