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Composición química y tamizaje fitoquímico del polvo de hojas y reto os del Anacardium occidentale L. (mara ón) Chemical composition and phytochemical screening of leaf and shoot powder of Anacardium occidentale L. (cashew tree)
Yordan Martínez Aguilar,Orlando Martínez Yero,Ariel Escalona Arias,Fernando Soto Rodríguez
Revista Cubana de Plantas Medicinales , 2012,
Abstract: Introducción: la composición química y el tamizaje fitoquímico de una planta medicinal puede definir sus beneficios; la literatura refiere información de estas determinaciones en la fruta del Anacardium occidentale L.; no obstante, en cuanto a las hojas y reto os no se encontró información suficiente. Objetivo: determinar la composición química y el tamizaje fitoquímico en el polvo de hojas y reto os del Anacardium occidentale L. Métodos: en el polvo de hojas y reto os de Anacardium occidentale L. se determinó la composición bromatológica, algunos carbohidratos, material saponificable, fitoesteroles, minerales, ácidos grasos y tamizaje fitoquímico; mediante técnicas del Ministerio de Salud Pública, Official Methods of Analysis, cromatografía gaseosa, espectrofotometría de absorción atómica y cromatografía líquida de alta eficiencia. Resultados: el polvo de hojas y reto os de A. occidentale mostró un aceptable contenido de materia seca, proteína bruta, betasitosterol y stigmasterol. El ácido graso saturado octadecanoico y el monoinsaturado gadoleico se detectaron con mayores cuantías en el polvo. Se observó una concentración significativa del potasio y del mineral traza manganeso. En el tamizaje fitoquímico, el extracto etéreo no presentó alcaloides, las coumarinas y quinonas se detectaron en el extracto etanólico y acuoso, respectivamente. Las antocianidinas, triterpenos o esteroides y taninos se observaron en el extracto etanólico. Además en ambos extractos (acuoso y etanólico) se detectaron flavonoides y saponinas. Conclusiones: según la composición química y la presencia de metabolitos secundarios benéficos en el polvo de las hojas y reto os de A. occidentale se recomienda el estudio de este polvo en humanos y animales, como nutracéutico o terapéutico. Introduction: the chemical composition and phytochemical screening of a medicinal plant can define its benefits. The literature covers information about these determinations on the fruit of Anacardium occidentale L. but little information was found about its leaves and shoots. Objective: to determine the chemical composition and phytochemical screening in the leaf and shoot powder from Anacardium occidentale L. Methods: bromatological composition, some carbohydrates, saponifiable material, phytosterols, minerals, fatty acids and phytochemical screening were determined in leaf and shoot powder from Anacardium occidentale L., using techniques approved by the Ministry of Public Health, Official Methods of Analysis, gas chromatography, atomic absorption spectrophotometer and high-performance liquid chromato
Composición química y tamizaje fitoquímico del polvo de hojas y reto?os del Anacardium occidentale L. (mara?ón)
Martínez Aguilar,Yordan; Martínez Yero,Orlando; Escalona Arias,Ariel; Soto Rodríguez,Fernando; Valdivié Navarro,Manuel;
Revista Cubana de Plantas Medicinales , 2012,
Abstract: introduction: the chemical composition and phytochemical screening of a medicinal plant can define its benefits. the literature covers information about these determinations on the fruit of anacardium occidentale l. but little information was found about its leaves and shoots. objective: to determine the chemical composition and phytochemical screening in the leaf and shoot powder from anacardium occidentale l. methods: bromatological composition, some carbohydrates, saponifiable material, phytosterols, minerals, fatty acids and phytochemical screening were determined in leaf and shoot powder from anacardium occidentale l., using techniques approved by the ministry of public health, official methods of analysis, gas chromatography, atomic absorption spectrophotometer and high-performance liquid chromatography. results: the leaf and shoot powder from anacardium occidentale l. showed an acceptable content of dry matter, crude protein, beta-sitosterol and stigmasterol. saturated fatty acid and monounsaturated octadecenoic, gadoleic larger amounts were detected in the powder. there was a significant concentration of potassium and manganese trace mineral. in the phytochemical screening, the ether extract showed no alkaloids, the coumarins and quinones were detected in the ethanol and aqueous extract, respectively. anthocyanidins, triterpenes or steroids and tannins were observed in the ethanol extract. also, in both extracts (aqueous and ethanolic) flavanoids and saponins were detected. conclusions: according to the chemical composition and the presence of beneficial secondary metabolites, it is recommended to study the use of leaf and shoot powder from a. occidentale in humans and animals as a nutraceutic or therapeutical agent.
To Go Viral
Ariel Cintron-Arias
Physics , 2014,
Abstract: Mathematical models are validated against empirical data, while examining potential indicators for an online video that went viral. We revisit some concepts of infectious disease modeling (e.g. reproductive number) and we comment on the role of model parameters that interplay in the spread of innovations. The dataset employed here provides strong evidence that the number of online views is governed by exponential growth patterns, explaining a common feature of viral videos.
Electrocauterización de la membrana de Bowman para el tratamiento de la queratopatía bullosa dolorosa
Escalona Leyva,Elizabeth; Casas Arias,Xiomara;
Revista Cubana de Oftalmolog?-a , 2002,
Abstract: the purpose of this paper is to evaluate the electrocauterization of bowman's membrane as a surgical alternative in the treatment of painful bullous keratopathy. 30 eyes from 30 patients who were diagnosed painful bullous keratopathy and had not improved with the habitual treatments were studied. age, sex, ethiology, time of evolution, epithelialization, complications and the symptomatic relief were taken as fundamental variables. data were manually tabulated, taking into account the number of patients. the psotsurgical bullous keratopathy (aphakic y pseudophakic) prevailed in 83.3 % of the patients. the most affected were those over 60 (63.3 %). no significant differences were found in relation to sex. the time of epithelialization was from 7 to 14 days in 93.3 % of the patients and complications were not severe and were only observed in 14 %. the relief of the symptoms was observed in 66.6 % during the first week of the postoperative. the electrocauterization of bowman's membrane is an efficient and simple method with satisfactory results in the treatment of painful bullous keratopathy
Electrocauterización de la membrana de Bowman para el tratamiento de la queratopatía bullosa dolorosa Electrocauterization of Bowman's membrane for the treatment of painful bullous keratopathy
Elizabeth Escalona Leyva,Xiomara Casas Arias
Revista Cubana de Oftalmolog?-a , 2002,
Abstract: El propósito en este trabajo es evaluar la electrocauterización de la membrana de Bowman como alternativa quirúrgica en el tratamiento de la queratopatía bullosa dolorosa. Se estudiaron 30 ojos de 30 pacientes con diagnóstico de queratopatía bullosa dolorosa que no habían logrado mejoría con los tratamientos habituales. Se tomaron como variables fundamentales la edad, el sexo, la etiología, el tiempo de evolución, la epitelización, las complicaciones y el alivio sintomático, los datos se tabularon de forma manual teniendo en cuenta el universo de pacientes. Predominó la queratopatía bullosa posquirúrgica (afáquicas y pseudofáquicas) en el 83,3 % de los pacientes. Las edades más afectadas fueron los mayores de 60 a os (63,3 %); no se encontraron diferencias significativas en cuanto al sexo. El tiempo de epitelización fue de 7 a 14 días en el 93,3 % de los pacientes y solo se encontraron complicaciones en el 14 % que no fueron de gravedad. El alivio de los síntomas se produjo en el 66,6 % en la primera semana del posoperatorio. La electrocauterización de la membrana de Bowman constituye un método eficaz, sencillo y con resultados satisfactorios en el tratamiento de la queratopatía bullosa dolorosa The purpose of this paper is to evaluate the electrocauterization of Bowman's membrane as a surgical alternative in the treatment of painful bullous keratopathy. 30 eyes from 30 patients who were diagnosed painful bullous keratopathy and had not improved with the habitual treatments were studied. Age, sex, ethiology, time of evolution, epithelialization, complications and the symptomatic relief were taken as fundamental variables. Data were manually tabulated, taking into account the number of patients. The psotsurgical bullous keratopathy (aphakic y pseudophakic) prevailed in 83.3 % of the patients. The most affected were those over 60 (63.3 %). No significant differences were found in relation to sex. The time of epithelialization was from 7 to 14 days in 93.3 % of the patients and complications were not severe and were only observed in 14 %. The relief of the symptoms was observed in 66.6 % during the first week of the postoperative. The electrocauterization of Bowman's membrane is an efficient and simple method with satisfactory results in the treatment of painful bullous keratopathy
El hábito de fumar se asocia a baja concentración plasmática de hormona antimülleriana en mujeres infértiles Effects of smoking on plasma antimüllerian hormone concentrations among infertile women
Ariel Fuentes,Javier Escalona,Pablo Céspedes,Victoria Repetto
Revista médica de Chile , 2013,
Abstract: Background: Smoking may hamperfemale fertility, probably modifying ovarian reserve. Antimüllerian hormone (AMH) is an accurate marker for ovarian reserve. Aim: To look for an association between smoking status and plasma AMH concentration. Patients and Methods: A cohort of 141 infertile women in a university setting in Santiago, Chile was studied. Demographic and smoking data, including the number of cigarettes smoked during the last week, were collected. A blood sample was obtained and kept frozen until determination of AMH by ELISA and follicle stimulating hormone (FSH) and estradiol at day three of the menstrual cycle, by radioimmunoanalysis. Results: Thirty two participants smoked (23%). There were no significant differences in age, parity, body mass index, causes of infertility and day three FSH and estradiol between smokers and nonsmokers. According to a regression analysis, there was a significant decrease in AMH concentration with age and active cigarette smoking. A drop in AMH of -0.189 ng/mL with a unitary change in age and a decrease of -2.29 ng/mL when everything else remains constant, except the smoking status, were established (p < 0.001 and r2 = 0.134). However, no dose response was observed when the number of cigarettes smoked during the last week were introduced in the model. Furthermore, no significant association ofplasma AMH with day three plasma FSH and estradiol concentrations was observed. Conclusions: Cigarette smoking is associated with decreased AMHplasma concentrations among infertile women. However there was no dose response relationship. The mechanisms underlying this association are unknown and further investigation is required.
EFECTO DE LA SUPLEMENTACIóN CON ALANINA Y GLICINA SOBRE LOS CLIVAJES INICIALES DE EMBRIONES BOVINOS PRODUCIDOS IN VITRO
Arias L,Catalina; Ruiz,Tatiana; Olivera A,Martha; Tarazona,Ariel;
Revista MVZ Córdoba , 2007,
Abstract: objective. to determine the effect of supplementation with alanine and glicyne in vitro culture systems on the cleavage rate of bovine embryos under conditions of high (20%) and lower (7%) oxygen tension. materials and methods. the embryos were produced from oocytes matured in vitro in m-199 supplemented with hormones and inseminated with cryopreservated semen; the zygotes were cultivated in cr1-aa medium. at culture moment alanine and glicyne were added (5 mm and 10mm final respectively). four (4) treatments were used (t1: amino acids and low oxygen tension; t2: amino acids and high oxygen tension; t3: non amino acids and low oxygen tension; t4: non amino acids and high oxygen tension). the cleavage was evaluated to 48 hpi (hours post insemination) being evaluated the number of embryos cleavaged on the total of culture embryos and the development stage (non cleavaged, 2, 4, 5-8 cells). the statistical program statistica version 5.0 was used. results. embryos rate of 5-8 cells in the treatment one regarding the other 3 ones were higher (p = 0.007). conclusions. the amino acids alanine, glicyne and in low oxygen tensions are fundamental for the initial cleavages because the proportion of competent embryos increases up to 48 hpi.
Fístula arteriovenosa postraumática. A propósito de un caso: dos flagelos del subdesarrollo. A propósito de un caso atendido en Timor Leste
Otero Reyes,Manuel; González Escalona,Denis; Duménigo Arias,Oscar; Gordis Aguilera.,María;
MediSur , 2010,
Abstract: the traumatisms that affect the extremities represent 80% of all the vascular traumatisms approximately. the inadequate handling of these it contributes to fateful consequences as the loss of the life or of the function of the extremity. the vascular lesions for firearm constitute one of the main causes with the appearance of arteriovenous fistula. we present the case of a 36 year old masculine patient with antecedents of having hurt 1 year ago by firearm in the root of the left thigh goes to present increase of volume of the extremity and difficulty to the march with sensation of fatigue and gravity. to the physical exam increase of volume of the limb more marked affection was verified in the root of the thigh, in the area related with the bullet impact thrill is felt and blow holosistólico is auscultated. the echo doppler and the tomography with contrast use evidenced the presence of a arteriovenous fistula. with this diagnosis was carried out surgical exploration and repair by means of veins bond for exclusion and interference of ilio-femoral arterial implant of politetrafluoroethylene (ptfe). the postoperative evolution was satisfactory with regression of all the clinical signs.
Traumatic arteriovenous fistula. Apropos of a case Fístula arteriovenosa postraumática. A propósito de un caso
Manuel Otero Reyes,Denis González Escalona,Oscar Duménigo Arias,María Victoria Gordis Aguilera.
MediSur , 2011,
Abstract: The traumatisms that affect the extremities represent 80% of all the vascular traumatisms approximately. The inadequate handling of these it contributes to fateful consequences as the loss of the life or of the function of the extremity. The vascular lesions for firearm constitute one of the main causes with the appearance of arteriovenous fistula. We present the case of a 36 year old masculine patient with antecedents of having hurt 1 year ago by firearm in the root of the left thigh goes to present increase of volume of the extremity and difficulty to the march with sensation of fatigue and gravity. To the physical exam increase of volume of the limb more marked affection was verified in the root of the thigh, in the area related with the bullet impact thrill is felt and blow holosistólico is auscultated. The echo doppler and the tomography with contrast use evidenced the presence of a arteriovenous fistula. With this diagnosis was carried out surgical exploration and repair by means of veins bond for exclusion and interference of ilio-femoral arterial implant of politetrafluoroethylene (PTFE). The postoperative evolution was satisfactory with regression of all the clinical signs. Los traumatismos vasculares representan aproximadamente el 80 % de todos los traumatismos que afectan a las extremidades. El manejo inadecuado de estos ocasiona consecuencias funestas como la pérdida de la vida o de la función de la extremidad. Las lesiones vasculares por arma de fuego constituyen una de las principales causas de la aparición de fístulas arteriovenosas. Se presenta el caso de un paciente de sexo masculino de 36 a os de edad, con antecedentes de herida por arma de fuego en la raíz del muslo izquierdo, este paciente acudió a la consulta del servicio de Angiología, por presentar aumento de volumen en la extremidad y se le dificultaba la marcha, además sentía sensación de cansancio. Al realizar el examen físico se constató aumento de volumen del miembro afectado más pronunciado en la raíz del muslo, en la zona relacionada con el impacto de bala se palpó frémito y se auscultó soplo holosistólico. La ecocardiografía Doppler y la tomografía con uso de contraste evidenciaron la presencia de una fístula arteriovenosa. Con este diagnóstico se realizó una exploración quirúrgica y la reparación mediante ligadura venosa por exclusión e interposición de injerto arterial ilio-femoral de politetrafluoroetileno. La evolución postoperatoria fue satisfactoria con regresión de todos los signos clínicos.
Variabilidad entre patólogos en el diagnóstico histológico de la infección por Helicobacter pylori: ¿un diagnóstico subjetivo?
Arteta Cueto,Ariel A; Giraldo Restrepo,Ruben Dario; Arias Restrepo,Luis F;
Iatreia , 2006,
Abstract: histopathologic diagnosis of helicobacter pylori (hp) infection is not necessarily easy, and reproducibility is not perfect. our aim was to determine differences in the frequency of hp infection according to the pathologists interpreting gastric biopsies in medellín ( colombia ). material and methods: all gastric biopsy reports of eight pathologists during one year were reviewed. we excluded cases with intestinal metaplasia, atrophy, dysplasia or carcinoma. we registered patient age, positivity or negativity for h. pylori, and pathologist. we determined the percentage with h. pylori infection and the percentage of each pathologist in order to determine differences. results: 2.023 cases were included. each pathologist evaluated a mean of 252.9 ± 154.9 cases (range: 102-445). patients were 43.5 ± 15.1 years-old (range: 12-90). h. pylori was diagnosed in 1.034 cases (51.1%). the range of positivity according to the pathologist was 38.8-71.1%; mean 51.1% ± 8.7% (p < 0,001). conclusion: among pathologists, there is a significant variability in the frequency of diagnosis of h. pylori infection. this result suggests the need to achieve greater homogeneity of concepts and criteria for the diagnosis of this infection, and of its severity.
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