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1.
Enferm. intensiva (Ed. impr.) ; 34(4): 176-185, Oct-Dic, 2023. tab, graf
Artículo en Español | IBECS | ID: ibc-227000

RESUMEN

La aparición de úlceras por presión (UPP) es una de las complicaciones frecuentes del decúbito prono (DP), debido a la presión prolongada y las fuerzas de cizallamiento. Objetivos: Comparar la incidencia de UPP secundarias a la posición del decúbito prono y describir su localización entre 4 unidades de cuidados intensivos (UCI) de hospitales públicos. Metodología: Estudio observacional descriptivo retrospectivo multicéntrico. La población estuvo formada por pacientes ingresados en la UCI entre febrero de 2020 y mayo 2021, diagnosticados de COVID-19 que precisaron decúbito prono. Las variables estudiadas fueron sociodemográficas, días de ingreso en la UCI, horas totales en DP, prevención de UPP, localización, estadio, frecuencia de cambios posturales, nutrición y aporte de proteínas. La recogida de datos se realizó a través de la historia clínica de las diferentes bases de datos informatizadas de cada hospital. Se realizó análisis descriptivo y asociación entre las variables, utilizando el programa SPSS vs.20.0.Resultados: Ingresaron 574 pacientes por COVID-19, el 43,03% fueron pronados. El 69,6% fueron hombres, la mediana de edad fue 66 (RIC: 55-74) y el IMC de 30,7 (RIC: 27-34,2). La mediana de estancia en la UCI fue de 28 días (RIC: 17-44,2) y la mediana de horas en DP por paciente 48h (RIC: 24-96). La incidencia de aparición de UPP fue del 56,3% y el 76,2% de los pacientes la presentaron; la localización más frecuente fue la frente (74,9%). Existen diferencias significativas entre hospitales en cuanto a la incidencia de UPP (p<0,001), su localización (p=0,000) y la duración media de horas por cada episodio de DP (p=0,001). Conclusiones: La incidencia de UPP secundarias al DP fue muy elevada. Existe gran variabilidad en cuanto a incidencia de UPP entre hospitales, la localización y la duración media de horas por cada episodio de DP.(AU)


The appearance of pressure ulcers (PU) is one of the frequent complications of prone position (PP), due to prolonged pressure and shear forces. Objectives: To compare the incidence of pressure ulcers secondary to prone position and describe their location among four Intensive Care Units (ICU) of public hospitals. Methods: Multicenter descriptive and retrospective observational study. The population consisted of patients admitted to the ICU between February 2020 and May 2021, diagnosed with Covid-19 who required prone decubitus. The variables studied were sociodemographic, days of admission to the ICU, total hours on PP, PU prevention, location, stage, frequency of postural changes, nutrition and protein intake. Data collection was carried out through the clinical history of the different computerized databases of each hospital. Descriptive analysis and association between variables were performed using SPSS vs.20.0. Results: A total of 574 patients were admitted for Covid-19, 43.03% were pronated. 69.6% were men, median age was 66 (IQR 55-74) and BMI 30.7 (RIC 27-34.2). Median ICU stay was 28 days (IQR 17-44.2), median hours on PD per patient 48h (IQR 24-96). The incidence of PU occurrence was 56.3%, 76.2% of patients presented a PU, the most frequent location was the forehead (74.9%). There were significant differences between hospitals in terms of PU incidence (p=0.002), location (p<0.001) and median duration of hours per PD episode (p=0.001). Conclusions: The incidence of pressure ulcers due to the prone position was very high. There is great variability in the incidence of pressure ulcers between hospitals, location and average duration of hours per episode of prone position.(AU)


Asunto(s)
Humanos , Masculino , Femenino , Úlcera por Presión , Posición Prona , Cuidados Críticos , /enfermería , Estudios Retrospectivos , Enfermería , Atención de Enfermería
2.
Enferm Intensiva ; 2023 Mar 14.
Artículo en Español | MEDLINE | ID: mdl-37359191

RESUMEN

The appearance of pressure ulcers (PU) is one of the frequent complications of prone position (PP), due to prolonged pressure and shear forces. Objectives: To compare the incidence of pressure ulcers secondary to prone position and describe their location among four Intensive Care Units (ICU) of public hospitals. Methods: Multicenter descriptive and retrospective observational study. The population consisted of patients admitted to the ICU between February 2020 and May 2021, diagnosed with Covid-19 who required prone decubitus. The variables studied were sociodemographic, days of admission to the ICU, total hours on PP, PU prevention, location, stage, frequency of postural changes, nutrition and protein intake. Data collection was carried out through the clinical history of the different computerized databases of each hospital. Descriptive analysis and association between variables were performed using SPSS vs.20.0. Results: A total of 574 patients were admitted for Covid-19, 43.03% were pronated. 69.6% were men, median age was 66 (IQR 55-74) and BMI 30.7 (RIC 27-34.2). Median ICU stay was 28 days (IQR 17-44.2), median hours on PD per patient 48 h (IQR 24-96). The incidence of PU occurrence was 56.3%, 76.2% of patients presented a PU, the most frequent location was the forehead (74.9%). There were significant differences between hospitals in terms of PU incidence (p = 0.002), location (p < 0.001) and median duration of hours per PD episode (p = 0.001). Conclusions: The incidence of pressure ulcers due to the prone position was very high. There is great variability in the incidence of pressure ulcers between hospitals, location and average duration of hours per episode of prone position.

3.
Enferm Intensiva (Engl Ed) ; 34(4): 176-185, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37248133

RESUMEN

The appearance of pressure ulcers (PU) is one of the frequent complications of prone position (PP), due to prolonged pressure and shear forces. OBJECTIVES: To compare the incidence of pressure ulcers secondary to prone position and describe their location among four Intensive Care Units (ICU) of public hospitals. METHODS: Multicenter descriptive and retrospective observational study. The population consisted of patients admitted to the ICU between February 2020 and May 2021, diagnosed with Covid-19 who required prone decubitus. The variables studied were sociodemographic, days of admission to the ICU, total hours on PP, PU prevention, location, stage, frequency of postural changes, nutrition and protein intake. Data collection was carried out through the clinical history of the different computerized databases of each hospital. Descriptive analysis and association between variables were performed using SPSS vs.20.0. RESULTS: A total of 574 patients were admitted for Covid-19, 43.03% were pronated. 69.6% were men, median age was 66 (IQR 55-74) and BMI 30.7 (RIC 27-34.2). Median ICU stay was 28 days (IQR 17-44.2), median hours on PD per patient 48 h (IQR 24-96). The incidence of PU occurrence was 56.3%, 76.2% of patients presented a PU, the most frequent location was the forehead (74.9%). There were significant differences between hospitals in terms of PU incidence (P = .002), location (P = .000) and median duration of hours per PD episode (P = .001). CONCLUSIONS: The incidence of pressure ulcers due to the prone position was very high. There is great variability in the incidence of pressure ulcers between hospitals, location and average duration of hours per episode of prone position.


Asunto(s)
COVID-19 , Úlcera por Presión , Anciano , Femenino , Humanos , Masculino , COVID-19/epidemiología , COVID-19/complicaciones , Incidencia , Unidades de Cuidados Intensivos , Úlcera por Presión/epidemiología , Úlcera por Presión/etiología , Úlcera por Presión/prevención & control , Posición Prona , Persona de Mediana Edad
4.
Clin Transl Oncol ; 21(9): 1168-1176, 2019 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-30783918

RESUMEN

PURPOSE: Current evidence suggests the need to improve the management of breakthrough cancer pain (BTcP). For this reason, we aimed to assess the opinion of a panel of experts composed exclusively of physicians from pain units, who play a major role in BTcP diagnosis and treatment, regarding the key aspects of BTcP management. METHODS: An ad hoc questionnaire was developed to collect real-world data on the management of BTcP. The questionnaire had 5 parts: (a) organizational aspects of pain units (n = 12), (b) definition and diagnosis (n = 3), (c) screening (n = 3), (d) treatment (n = 8), and (e) follow-up (n = 7). RESULTS: A total of 89 pain-unit physicians from 13 different Spanish regions were polled. Most of them agreed on the traditional definition of BTcP (78.9%) and the key features of BTcP (92.1%). However, only 30.3% of participants used the Davies' algorithm for BTcP diagnosis. Respondents preferred to prescribe rapid-onset opioids [mean 77.0% (SD 26.7%)], and most recommended transmucosal fentanyl formulations as the first option for BTcP. There was also considerable agreement (77.5%) on the need for early follow-up (48-72 h) after treatment initiation. Finally, 65.2% of participants believed that more than 10% of their patients underused rapid-onset opioids. CONCLUSIONS: There was broad agreement among pain experts on many important areas of BTcP management, except for the diagnostic method. Pain-unit physicians suggest that rapid-onset opioids may be underused by BTcP patients in Spain, an important issue that need to be evaluated in future studies.


Asunto(s)
Analgésicos Opioides/uso terapéutico , Dolor Irruptivo/tratamiento farmacológico , Dolor en Cáncer/tratamiento farmacológico , Neoplasias/complicaciones , Manejo del Dolor/métodos , Pautas de la Práctica en Medicina/normas , Dolor Irruptivo/diagnóstico , Dolor Irruptivo/etiología , Dolor en Cáncer/diagnóstico , Dolor en Cáncer/etiología , Estudios Transversales , Humanos , Pronóstico , Encuestas y Cuestionarios
5.
Water Res ; 144: 522-531, 2018 11 01.
Artículo en Inglés | MEDLINE | ID: mdl-30077912

RESUMEN

Oxygen inhibits anammox, a bioconversion executed by anoxic ammonium oxidizing bacteria (AnAOB). Nonetheless, oxygen is mostly found in the proximity of AnAOB in nitrogen removal applications, being a substrate for nitritation. The experiments performed to date were mostly limited to batch activity tests where AnAOB activity is estimated during oxygen exposure. However, little attention has been paid to the recovery and reversibility of activity following aerobic conditions, of direct relevance for bioreactor operation. In this work, anoxic and autotrophic reactor cultivation at 20 °C yielded an enriched microbial community in AnAOB, consisting for 75% of a member of the genus Brocadia. High-resolution kinetic data were obtained with online ammonium measurements and further processed with a newly developed Python data pipeline. The experimentally obtained AnAOB response showed complete inhibition until micro-aerobic conditions were reached again (<0.02 mg O2 L-1). After oxygen inhibition, AnAOB recovered gradually, with recovery times of 5-37 h to reach a steady-state activity, dependent on the perceived inhibition. The recovery immediately after inhibition was lowest when exposed to higher oxygen concentrations (range: 0.5-8 mg O2 L-1) with long contact times (range: 9-24 h). The experimental data did not fit well with a conventional 'instant recovery' Monod-type inhibition model. Yet, the fit greatly improved by incorporating a dynamic growth rate formula accurately describing gradual activity recovery. With the upgraded model, long-term kinetic simulations for partial nitritation/anammox (PN/A) with intermittent aeration showed a decrease in growth rate compared to the instant recovery mode. These results indicate that recovery of AnAOB after oxygen exposure was previously overlooked. It is recommended to account for this effect in the intensification of partial nitritation/anammox.


Asunto(s)
Bacterias/metabolismo , Reactores Biológicos/microbiología , Modelos Teóricos , Oxígeno/metabolismo , Eliminación de Residuos Líquidos/métodos , Compuestos de Amonio/metabolismo , Procesos Autotróficos , Nitrógeno , Eliminación de Residuos Líquidos/instrumentación
6.
J Dairy Sci ; 101(1): 480-490, 2018 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-29103714

RESUMEN

The periparturient period is the most critical phase in the productive cycle of dairy cows and is characterized by impairment of the immune system. Our objective was to evaluate the effect of feeding ethyl-cellulose rumen-protected methionine (RPM) starting at d -28 from expected parturition through 60 d in milk on biomarkers of inflammation, oxidative stress, and liver function as well as leukocyte function. Sixty multiparous Holstein cows were used in a block design and assigned to either a control or the control plus ethyl-cellulose RPM (Mepron, Evonik Nutrition & Care GmbH). Mepron was supplied from -28 to 60 d in milk at a rate of 0.09% and 0.10% dry matter during the prepartum and postpartum period. That rate ensured that the ratio of Lys to Met in the metabolizable protein was close to 2.8:1. Blood samples from 15 clinically healthy cows per treatment were collected at d -30, -14, 1, 7, 21, 30, and 60 and analyzed for biomarkers of liver function, inflammation, and oxidative stress. Neutrophil and monocyte function in whole blood was measured in vitro at -14, 1, 7, 21, and 30 d in milk. The statistical model included the random effect of block and fixed effect of treatment, time, and its interaction. Compared with control, ethyl-cellulose RPM increased plasma cholesterol and paraoxonase after parturition. Among the inflammation biomarkers measured, ethyl-cellulose RPM led to greater albumin (negative acute-phase protein) and lower haptoglobin than control cows. Although concentration of IL-1ß was not affected by treatments, greater IL-6 concentration was detected in response to ethyl-cellulose RPM. Cows supplemented with ethyl-cellulose RPM had greater plasma concentration of ferric-reducing antioxidant power, ß-carotene, tocopherol, and total and reduced glutathione, whereas reactive oxygen metabolites were lower compared with control cows. Compared with control, ethyl-cellulose RPM enhanced neutrophil phagocytosis and oxidative burst. Overall, the results indicate that ethyl-cellulose RPM supply to obtain a Lys-to-Met ratio of 2.8:1 in the metabolizable protein during the periparturient period and early lactation is an effective approach to help mitigate oxidative stress and inflammation as well as enhance liver and neutrophil function in dairy cows.


Asunto(s)
Antioxidantes/farmacología , Suplementos Dietéticos , Inflamación/veterinaria , Metionina/farmacología , Leche/metabolismo , Estrés Oxidativo/efectos de los fármacos , Animales , Biomarcadores/análisis , Bovinos , Celulosa/análogos & derivados , Celulosa/farmacología , Femenino , Inflamación/prevención & control , Lactancia , Hígado/efectos de los fármacos , Hígado/metabolismo , Modelos Estadísticos , Neutrófilos/efectos de los fármacos , Periodo Periparto , Embarazo , Rumen/metabolismo
7.
J Dairy Sci ; 100(11): 9352-9360, 2017 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-28918137

RESUMEN

Feeding a higher-energy diet by increasing cereal grains at the expense of forage during the last 3 to 4 wk prepartum is a traditional approach to help the rumen "adapt" to the traditional diets fed at the onset of lactation. Increasing grain/concentrate in the diet changes ruminal fermentation and in sheep and goats elicits marked changes in mRNA expression of immune-related genes in ruminal epithelium. Whether such changes at the epithelial and systemic levels occur in dairy cows when the dietary energy content increases at a fixed level of concentrate is unknown. Fourteen nonpregnant, nonlactating Holstein cows were fed a control lower-energy (CON, 1.30 Mcal/kg of dry matter) diet to meet 100% of estimated nutrient requirements for 3 wk, after which half of the cows were assigned to a higher-energy diet (OVE, 1.60 Mcal/kg of dry matter) and half of the cows continued on CON for 6 wk. Levels of forage and concentrate for CON and OVE were 80 and 79% and 20 and 21%, respectively. Plasma samples were collected 1 d before slaughter to examine biomarkers of metabolism, liver function, inflammation, and oxidative stress. The reticulo-rumen mass was recorded at slaughter, and samples of epithelium were harvested from all cows. The expression of 29 genes associated with tight junctions, immune function, and nutrient transport (volatile fatty acids, urea, and trace minerals) was examined. Overfeeding energy led to consistently greater dry matter intake over time, and lowered plasma concentrations of haptoglobin, paraoxonase, bilirubin, fatty acids, and myeloperoxidase (secreted by neutrophils). In contrast, OVE resulted in greater hydroxybutyrate and cholesterol concentrations. A greater reticulo-rumen mass in cows fed OVE did not alter genes associated with tight junctions (CDLN1, CDNL4, OCLN, TJP1), immune function (IL1B, IL10, NFKB1, TLR2, TLR4, TNF), oxidative stress (SOD1, SOD2), or most nutrient transporters. However, feeding OVE upregulated the acute-phase protein SAA3 by 3.5-fold and downregulated a volatile fatty acid transporter (SLC16A1) and a Fe and Cu transporter (SLC11A2). The lack of effect on mRNA expression along with lower plasma concentrations of inflammation biomarkers indicates that long-term intake of a higher-energy diet ad libitum was not detrimental to ruminal epithelium integrity. In that context, a protective function of SAA3 could be envisioned with a role in opsonizing gram-negative bacteria that produce endotoxins. The long-term control of volatile fatty acid absorption and trace minerals from the rumen in cows overfed energy does not seem to be controlled at the gene transcription level. The relevance of these findings to the nutritional management of pregnant dry cows merits further research.


Asunto(s)
Enfermedades de los Bovinos/metabolismo , Epitelio/metabolismo , Inflamación/veterinaria , Reticulum/fisiología , Rumen/fisiología , Alimentación Animal/análisis , Animales , Biomarcadores/metabolismo , Bovinos , Enfermedades de los Bovinos/etiología , Dieta/veterinaria , Ingestión de Energía , Ácidos Grasos/metabolismo , Ácidos Grasos Volátiles/metabolismo , Femenino , Fermentación , Inflamación/etiología , Lactancia , Leche/metabolismo , Embarazo , Ovinos
8.
J Dairy Sci ; 100(9): 7455-7467, 2017 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-28711252

RESUMEN

The onset of lactation in dairy cows is characterized by severe negative energy and protein balance. Increasing Met availability during this time may improve milk production, hepatic lipid metabolism, and immune function. The aim of this study was to evaluate the effect of feeding ethyl-cellulose rumen-protected methionine (RPM; Mepron, Evonik Nutrition and Care GmbH, Hanau-Wolfgang, Germany) on the performance of dairy cows during prepartum and early-lactation periods. Sixty multiparous Holstein cows were used in a block design and assigned to either a control or an ethyl-cellulose RPM diet. Ethyl-cellulose RPM was supplied from -28 to 60 d relative to parturition at a rate of 0.09% and 0.10% of dry matter during the prepartum and postpartum periods, respectively. That rate ensured that the ratio of Lys to Met in metabolizable protein was close to 2.8:1. Cows fed ethyl-cellulose RPM had dry matter intakes (DMI) that were 1.2 kg/d greater during the prepartum period and consequently had overall greater cumulative DMI than cows in the control group. Compared with controls, during the fresh period (1-30 d in milk; DIM) feeding ethyl-cellulose RPM increased DMI by 1.7 kg/d, milk yield by 4.1 kg/d, fat yield by 0.17 kg/d, milk protein yield by 0.20 kg/d, 3.5% fat-corrected milk by 4.3 kg/d, and energy-corrected milk by 4.4 kg/d. Although ethyl-cellulose RPM supplementation increased milk protein content by 0.16 percentage units compared with the control during the fresh period, no differences were observed for milk fat, lactose, and milk urea nitrogen concentration. During the high-producing period (31-60 DIM), cows fed ethyl-cellulose RPM increased DMI and milk yield by 1.45 and 4.4 kg/d, respectively. Ethyl-cellulose RPM also increased fat yield by 0.19 kg/d, milk protein yield by 0.17 kg/d, 3.5% fat-corrected milk by 4.7 kg/d, and energy-corrected milk by 4.8 kg/d compared with controls. Ethyl-cellulose RPM supplementation reduced plasma fatty acids in the fresh period and decreased γ-glutamyl transferase, indicating better liver function. In conclusion, when lysine was adequate, feeding ethyl-cellulose RPM to achieve a ratio close to 2.8:1 in metabolizable protein improved dairy cow performance from parturition through 60 DIM. The greater milk production was, at least in part, driven by the greater voluntary DMI and better liver function.


Asunto(s)
Celulosa/análogos & derivados , Lactancia/metabolismo , Metabolismo de los Lípidos , Hígado/metabolismo , Metionina/metabolismo , Leche/metabolismo , Animales , Bovinos , Celulosa/administración & dosificación , Dieta , Grasas de la Dieta/metabolismo , Femenino , Alemania , Sistema Inmunológico/fisiología , Lactosa/metabolismo , Lisina/administración & dosificación , Lisina/metabolismo , Metionina/administración & dosificación , Proteínas de la Leche/biosíntesis , Periodo Posparto , Embarazo , Rumen
9.
Rev Esp Sanid Penit ; 16(3): 91-102, 2014.
Artículo en Español | MEDLINE | ID: mdl-25418829

RESUMEN

OBJECTIVE: To assess the comprehensive care program for the mentally ill in prison (PAIEM), which has been implemented for 3 years in Spanish prisons with the aim of improving processes and results. METHODS: Descriptive study of the data gathered from an anonymous questionnaire completed by members of the PAIEM team in prisons. Frequency distributions were obtained of all the variables relating to facts, attitudes, opinions, experiences, situations and processes of the PAIEM. RESULTS: 91.2% of the PAIEM teams responded. Psychologists, educators, doctors and social workers were the professionals that collaborated most actively in the PAIEM (73%-84%) and were the ones to act most frequently as tutors. The mentally ill are usually located in ordinary modules (80%). The most commonly used activities for their psycho-social rehabilitation are self care (73%), education for health, preparation for daily life and social skills (more than 60%). Interventions with families are basically by telephone (79%). Bivariate analysis showed that the PAIEMs that operate most effectively are those that coordinate well with other technical teams, that prepare referral more than six months prior to release and ones where the NGOs process the referrals. Over 71% of the professionals observed improvements of disabilities and needs in over half the patients more than half of the professionals involved are satisfied (3.4/5) with their participation, although they acknowledge that there is a greater work load. CONCLUSIONS: The activities of the PAIEM are adequate, especially in the phases of early detection, stabilisation and rehabilitation and less so in the social incorporation phase, which improves when the third sector intervenes in referrals of patients to the social health care network outside prison.


Asunto(s)
Atención Integral de Salud/organización & administración , Trastornos Mentales/terapia , Servicios de Salud Mental/organización & administración , Prisiones/organización & administración , Actitud del Personal de Salud , Atención Integral de Salud/métodos , Humanos , Satisfacción del Paciente/estadística & datos numéricos , Prisiones/métodos , Evaluación de Programas y Proyectos de Salud , Garantía de la Calidad de Atención de Salud , España , Encuestas y Cuestionarios
10.
Biotechnol Lett ; 36(10): 1981-6, 2014 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-24930100

RESUMEN

Ammonium is a substrate of the anaerobic ammonium oxidation (Anammox) process but it has been suggested as a substrate-inhibitor because of the action of its unionized form, free ammonia. High pH of the medium is also an important limiting factor of the Anammox bacteria. Both effects are difficult to discriminate. In this work the inhibitory effects of high pH, total ammonia (TA) and NH3 on the Anammox process were investigated simultaneously. Results confirmed that TA caused no inhibition and high pH is a much more important inhibiting factor than NH3 in mildly alkaline conditions, based on a multi-factorial analysis. Values of pH higher than 7.6 caused Anammox inhibition >10 % and should be avoided during the application of the Anammox process in practice.


Asunto(s)
Amoníaco/farmacología , Compuestos de Amonio/farmacología , Fenómenos Fisiológicos Bacterianos/efectos de los fármacos , Medios de Cultivo/química , Anaerobiosis , Bacterias/metabolismo , Biopelículas , Concentración de Iones de Hidrógeno , Oxidación-Reducción
11.
Water Sci Technol ; 69(8): 1682-8, 2014.
Artículo en Inglés | MEDLINE | ID: mdl-24759529

RESUMEN

Anaerobic ammonium oxidation (anammox) is a recently discovered microbial process commonly applied to treat ammonium pollution in effluents with low organic carbon content. Modeling anammox processes is important for simulating and controlling full-scale plants. In this study, the anammox process was simulated using three models, and substrate and growth parameters obtained by different research groups. Two Brocadia spp.-dominated mixed cultures, one granular and the other flocculent, were used for this purpose. A very good correlation between experimental data using both sludges and model predictions was achieved by one of the models, obtaining correlation coefficients higher than 0.997. Other models and stoichiometric equations tested were unable to predict the anammox kinetics and stoichiometry. Furthermore, the thermodynamic behavior of the two mixed cultures was compared through the determination of the energy of activation of the anammox conversion at temperatures ranging from 9 to 40 °C. Optimum temperature for anammox activity was established at 30-35 °C in both cases. The energy of activation values calculated for granular sludge and flocculent sludge were 64 and 124 kJ mol(-1), respectively.


Asunto(s)
Compuestos de Amonio , Bacterias/metabolismo , Reactores Biológicos , Termodinámica , Anaerobiosis , Bacterias/clasificación , Cinética , Oxidación-Reducción
12.
Biotechnol Lett ; 36(3): 547-51, 2014 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-24170177

RESUMEN

Nitrite is a substrate but also an inhibitor of anaerobic ammonium oxidation (anammox).There is currently no consensus on whether ionized nitrite (INi) or free nitrous acid (FNA) is the actual inhibitor of the process. The inhibition by INi and FNA on the anammox process has been analysed using a wide range of INi and FNA concentrations and by altering the pH and total nitrite conditions. The inhibitory impacts of both species were quantified through a rational inhibition equation, considering INi and FNA as substrate inhibitor and non-competitive inhibitor, respectively. Inhibitory constants were calculated with strong statistical support as 561 mg INi-N l(-1) and 0.117 mg FNA-N l(-1). Based on the model, INi is the main inhibiting species of the anammox process at pH > 7.1, which are the most common conditions occurring in field applications of anammox.


Asunto(s)
Compuestos de Amonio/metabolismo , Nitritos/metabolismo , Concentración de Iones de Hidrógeno , Ácido Nitroso/metabolismo , Oxidación-Reducción
13.
Bioresour Technol ; 139: 94-100, 2013 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-23648757

RESUMEN

In this study, kinetic analyses were conducted for two Brocadia-dominated enrichment cultures, granular and flocculent, retrieved from lab-scale anaerobic ammonium oxidation (anammox) reactors. Substrate KS ranged from 0.35 to 0.69 mMN and VSmax ranged from 0.67 to 0.88 mmol Ng(-1)VSSh(-1). The model respected the experimentally measured stoichiometry of N-compounds, serving as an independent validation. Growth kinetics of the flocculent sludge was also studied, which indicates a µmax of 0.0984 d(-1) and a YX/S of 0.105 mol C-biomass mol(-1)NH4(+). The flocculent enrichment culture was used to determine the stoichiometric equation. The kinetic parameters of the Brocadia spp. cultures measured here can be used for optimizing applications of the anammox process.


Asunto(s)
Compuestos de Amonio/metabolismo , Bacterias/metabolismo , Anaerobiosis , Bacterias/crecimiento & desarrollo , Biomasa , Floculación , Cinética , Modelos Teóricos , Nitratos/análisis , Nitritos/análisis , Nitrógeno , Oxidación-Reducción , Reproducibilidad de los Resultados , Aguas del Alcantarillado/microbiología , Especificidad por Sustrato , Factores de Tiempo
14.
J Anim Physiol Anim Nutr (Berl) ; 97(1): 109-18, 2013 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-22050125

RESUMEN

Effects of considering the comminution rate (k(c) ) and the correction of microbial contamination (using (15) N techniques) of particles in the rumen on estimates of ruminally undegraded fractions and their intestinal digestibility were examined generating composite samples (from rumen-incubated residues) representative of the undegraded feed rumen outflow. The study used sunflower meal (SFM) and Italian ryegrass hay (RGH) and three rumen and duodenum cannulated wethers fed with a 40:60 RGH to concentrate diet (75 g DM/kgBW(0.75) ). Transit studies up to the duodenum with Yb-SFM and Eu-RGH marked samples showed higher k(c) values (/h) in SFM than in RGH (0.577 vs. 0.0892, p = 0.034), whereas similar values occurred for the rumen passage rate (k(p) ). Estimates of ruminally undegraded and intestinal digestibility of all tested fractions decreased when k(c) was considered and also applying microbial correction. Thus, microbial uncorrected k(p) -based proportions of intestinal digested undegraded crude protein overestimated those corrected and k(c) -k(p) -based by 39% in SFM (0.146 vs. 0.105) and 761% in RGH (0.373 vs. 0.0433). Results show that both k(c) and microbial contamination correction should be considered to obtain accurate in situ estimates in grasses, whereas in protein concentrates not considering k(c) is an important source of error.


Asunto(s)
Digestión/fisiología , Helianthus/microbiología , Lolium/microbiología , Rumen/microbiología , Rumen/fisiología , Ovinos/fisiología , Animales , Bacterias , Intestinos/fisiología , Masculino , Tamaño de la Partícula
15.
Animal ; 7(2): 223-31, 2013 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-23032153

RESUMEN

The protection of sunflower meal (SFM) proteins by treatments with solutions of malic acid (1 M) or orthophosphoric acid (0.67 M) and heat was studied in a 3 × 3 Latin-square design using three diets and three rumen and duodenum cannulated wethers. Acid solutions were applied to SFM at a rate of 400 ml/kg under continuous mixing. Subsequently, treated meals were dried in an oven at 150°C for 6 h. Diets (ingested at 75 g/kg BW0.75) were isoproteic and included 40% Italian ryegrass hay and 60% concentrate. The ratio of untreated to treated SFM in the concentrate was 100 : 0 in the control diet and around 40 : 60 in diets including acid-treated meals. The use of acid-treated meals did not alter either ruminal fermentation or composition of rumen contents and led to moderate reductions of the rumen outflow rates of untreated SFM particles, whereas it did not affect their comminution and mixing rate. In situ effective estimates of by-pass (BP) and its intestinal effective digestibility (IED) of dry matter (DM), CP and amino acids (AAs) were obtained considering both rates and correcting the particle microbial contamination in the rumen using 15N infusion techniques. Estimates of BP and IED decreased applying microbial correction, but these variations were low in agreement with the small contamination level. Protective treatments increased on average the BP of DM (48.5%) and CP (267%), mainly decreasing both the soluble fraction and the degradation rate but also increasing the undegradable fraction, which was higher using orthophosphoric acid. Protective treatments increased the IED of DM (108%) and CP, but this increase was lower using orthophosphoric acid (11.8%) than malic acid (20.7%). Concentrations of AA were similar among all meals, except for a reduction in lysine concentrations using malic acid (16.3%) or orthophosphoric acid (20.5%). Protective treatments also increased on average the BP of all AA, as well as the IED of most of them. Evidence of higher increases for those AA showing a high resistance to degradation in the untreated meal were also observed. The total supply of metabolisable AA was increased by 3.87 times for sulphur-containing AA, whereas that of lysine was increased by 2.5 times, mainly because of lysine losses with heat treatments. These treatments and especially that with malic acid would be useful to increase the protein value of these meals but their combined use with lysine-rich protein concentrates would improve the metabolisable protein profile.


Asunto(s)
Proteínas en la Dieta/administración & dosificación , Helianthus/química , Mucosa Intestinal/metabolismo , Proteínas de Plantas/química , Desnaturalización Proteica , Oveja Doméstica/metabolismo , Aminoácidos/administración & dosificación , Aminoácidos/análisis , Aminoácidos/metabolismo , Alimentación Animal/análisis , Fenómenos Fisiológicos Nutricionales de los Animales/efectos de los fármacos , Animales , Fermentación/efectos de los fármacos , Contenido Digestivo/química , Contenido Digestivo/efectos de los fármacos , Calor , Intestinos/efectos de los fármacos , Malatos/farmacología , Masculino , Ácidos Fosfóricos/farmacología , Proteínas de Plantas/administración & dosificación , Rumen/efectos de los fármacos , Rumen/metabolismo
16.
Rev. Soc. Esp. Dolor ; 19(5): 264-272, sept.-oct. 2012. ilus
Artículo en Español | IBECS | ID: ibc-107394

RESUMEN

El hombro doloroso es una entidad que encontramos en nuestra práctica diaria con relativa frecuencia. Con la introducción de la ultrasonografía, se abre un campo novedoso ya que podemos explorar, localizar e infiltrar exactamente la zona lesionada. La ecografía permite una exploración en la misma consulta, así como la capacidad de realizar una exploración dinámica. El hombro se compone de 5 articulaciones: 3 verdaderas (esternoclavicular, acromioclavicular y glenohumeral) y 2 denominadas falsas (subacromial y escapulotorácica). Siempre que sea posible, intentaremos realizar la punción en plano, intentando visualizar el trayecto completo de la aguja y la punta de la misma. En el intervencionismo del hombro esto es bastante fácil de conseguir puesto que se trata de estructuras muy superficiales. Es muy poco probable que se produzcan daños graves durante la infiltración del hombro. Tendremos especial cuidado de no puncionar estructuras vasculares (AU)


Painful shoulder is an entity that we find in our daily practice with relative frequency. With the introduction of ultrasound, opens a new field that we can explore, locate and exactly infiltrate the injured area. Ultrasound allows an exploration in the same act, as well as the ability to make a dynamic scanning. The shoulder is made up of 5 joint: true 3 (sternoclavicular, acromioclavicular and glenohumeral) and 2 known as false (subacromial and thoracic scapula). Wherever possible, we will try to puncture in plane, trying to display the full path of the needle and the tip of it. In the interventionism of the shoulder, this is quite easy to get since it’s very superficial structures. It is highly unlikely any serious damage during the infiltration of the shoulder. Take special care of non piercing vascular structures (AU)


Asunto(s)
Humanos , Masculino , Femenino , Articulación del Hombro , Dolor de Hombro/terapia , Dolor de Hombro , Hombro/patología , Hombro , Tendones/patología , Tendones , Tratamiento de Radiofrecuencia Pulsada/tendencias , Tratamiento de Radiofrecuencia Pulsada
17.
Animal ; 6(3): 468-75, 2012 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-22436226

RESUMEN

Previous studies have indicated that (15)N enrichment of solid-associated bacteria (SAB) may be predicted from the same value in liquid-associated bacteria (LAB). The aims of this study were to confirm this and to measure the error in the nutrient supply from SAB, when LAB are used as the reference sample. For this purpose, the chemical and amino acid (AA) compositions of both the bacterial populations were studied in four experiments carried out on different groups of three rumen cannulated wethers. Diets (one in Experiments 1 and 4 and three in Experiments 2 and 3) had forage-to-concentrate ratios (dry matter (DM) basis) between 2 : 1 and 40 : 60, and were consumed at intake levels between 40 and 75 g DM/kg (BW)(0.75). The bacteria samples were isolated after continuous infusion of ((15)NH(4))(2)SO(4) (40, 18, 30 and 25 mg (15)N/day, in Experiments 1 to 4, respectively) for at least 14 days. In all experiments, SAB had consistently higher concentrations of organic matter (826 v. 716 g/kg DM, as average) and total lipids (192 v. 95 g/kg DM, as average) than LAB. Similar CP concentrations of both populations were observed, except a higher concentration in SAB than in LAB in Experiment 3. A consistent (in Experiment 4 only as tendency) higher AA-N/total N ratio (on average 17.5%) was observed in SAB than in LAB. The (15)N enrichment in SAB was systematically lower than in LAB. On the basis of the results of all studies a close relationship was found between the (15)N enrichment in SAB and LAB, which was shown irrespective of experiments. This relationship was established from Experiments 1 and 2 and the above cited previous results (n = 20; P < 0.001; R(2) = 0.996), and then confirmed from the results of Experiments 3 and 4. These relationships between SAB and LAB demonstrate that CP supply from SAB is underevaluated by, on average, 21.2% when LAB are used as the reference. This underevaluation was higher for true protein and even higher for the lipid supply (32.5% and 59.6%, respectively, as an average of the four experiments). Large differences in AA profile were observed between SAB and LAB. The prediction equation obtained using (15)N as the marker may be used to correct the errors associated with the traditional use of LAB as the reference sample, and therefore to obtain more accurate estimates of the microbial nutrient supply to the ruminants.


Asunto(s)
Alimentación Animal , Bacterias/aislamiento & purificación , Nitrógeno/análisis , Rumen/microbiología , Ovinos/microbiología , Aminoácidos/análisis , Animales , Bacterias/clasificación , Biomarcadores/análisis , Cromatografía de Gases , Lípidos/análisis , Masculino
18.
Animal ; 5(8): 1188-94, 2011 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-22440171

RESUMEN

Efficacy of combined acid-heat treatments to protect crude protein (CP) against ruminal degradation has not been extensively researched. Four in vitro trials (Daisy technology) with orthophosphoric and malic acids were performed to examine effects on protection of sunflower meal protein. In Trial 1, effects of the solution volume for adding two doses of orthophosphoric acid (0.4 and 1.2 eq/kg sunflower meal) were tested using five dilution volumes (80, 160, 240, 320 and 400 ml/kg of feed) for each acid dose. Samples were heated at 60°C. The quantity of CP that remained undegraded after 20 h in vitro (IVUCP) increased with the amount of acid added (P = 0.01). Increasing the dilution volume also tended (P = 0.065) to increase IVUCP. Therefore, a dilution volume of 400 ml/kg was employed in all further trials. In Trial 2, treatments with solutions of orthophosphoric and malic acids (1.2, 2.4, 3.6 and 4.8 eq/kg) and 60°C of drying temperature were used. Increased CP protection with increased acid doses was described. In this and further trials, higher protective effects of malic acid than orthophosphoric acid were also shown. In Trial 3, the effects of both these acids, four acid concentrations (0.6, 1.2, 1.8 and 2.4 eq/kg) and three levels of heat treatment required for drying the samples (100, 150 and 200°C for 60, 30 and 20 min, respectively) were evaluated. An interaction acid type × concentration × temperature was shown. In addition, interactions concentration × temperature was shown in each acid. With heat treatments of 100°C to 150°C, benefits were not obtained after increasing the acid dose over 0.8 eq/kg. The increase of the heat treatments to 200°C and the acid dose up to 1.2 eq/kg increased protection, but to exceed this dose did not improve protection. In Trial 4, available lysine, CP solubility in McDougall buffer and IVUCP were compared after treatment with water or solutions (0.8 eq/kg) of orthophosphoric or malic acids using 100°C and 150°C heat treatments as described in Trial 3. No effects on available lysine were observed. Both CP solubility and IVUCP were reduced to a greater degree by acids than by water treatment. The results showed a high effectiveness of acid-heat treatments. Levels of protection are dependent on the acid dose, its dilution, acid type and drying conditions.

19.
An. psiquiatr ; 25(6): 287-294, nov.-dic. 2009. ilus
Artículo en Español | IBECS | ID: ibc-77744

RESUMEN

En este trabajo pretendemos estudiar las reaccionesde la mujer tras recibir el diagnóstico de cáncer demama. Para ello, hemos tomado a aquellas pacientesmastetomizadas que nos consultaron por problemas psicológicosen relación a esta enfermedad y que siguieronun proceso de psicoterapia reglada. En este contexto tanparticular, donde se expresaron libre y espontáneamente,fue posible obtener numerosos enunciados referidosa las vicisitudes por las que pasaron.Se desveló que sus reacciones eran de carácter emocional(no sentimental) y que el contenido de éstasdependía del momento del diagnóstico en que se hallabany de la elaboración que hicieron, pasando por: preocupación,sorpresa, extrañamiento, miedo y hasta desbordamiento.Estas manifestaciones corrían paralelas ala necesidad de que la paciente tomara diversas decisionesen relación al tratamiento, para las cuáles evidentementeno se hallaba capacitada.Finalmente, descubrimos pacientes que mostraronespeciales dificultades en este proceso de asimilacióndebido a las características de su personalidad y, en estesentido, aislamos algunos rasgos especialmente problemáticos:omnipotencia, control, temor al cambio, inflexibilidad, etc(AU)


Our purpose is to study the reactions of women afterreceiving a diagnosis of breast cancer. We took a sampleof mastectomized women who consulted for psychologicalproblems related to the disease and followeda regular process of psychotherapy. In this context offree and spontaneous expression, numerous statementsabout the events that passed by was obtained.We found that the reactions were emotional in nature(not sentimental) and that the content of these dependedon the time of diagnosis going through several stages:concern, surprise, alienation, fear. these events dependedon the decisions to be taken in relation to treatmentfor which they were not capable.Finally we discovered some patients who had greatdifficulty in the process of assimilation due to personalitycharacteristics what allowed us to isolate the problematicfeatures: omnipotence, control, fear of change,inflexibility etc(AU)


Asunto(s)
Humanos , Femenino , Neoplasias de la Mama/psicología , Acontecimientos que Cambian la Vida , Mastectomía , Actitud Frente a la Salud , Revelación de la Verdad , Psicoterapia , Neoplasias de la Mama/diagnóstico
20.
Rev Esp Sanid Penit ; 11(1): 3-7, 2009 Jun.
Artículo en Español | MEDLINE | ID: mdl-23128407

RESUMEN

The prevalence of Personality Disorders (PD) in a prison and its effect on prison social climate are studied. Our research shows a statistically significant relationship between diagnosis of PD and indicators of social climate disruption such as aggressive interpersonal conduct or compulsive demand for psychoactive drugs in medical consultations. PD is one of the most common mental disorders in prison, and requires special attention from health services, while management of the disorder is a tremendously complex issue in the prison context.

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