ABSTRACT
Abstract The objective of the present study was to develop time delayed chronotherapeutic formulation of Eplerenone (Ep) to provide rapid drug release after a pre-determined lag time for the treatment of early morning hypertension. Cyclodextrin complexation was used to prepare fast release Ep core tablets. The developed core tablets were then coated with different rate-controlling polymers using compression coating technique. The developed tablets were evaluated for hardness, friability, drug content and swelling index. The in-vitro drug release was carried out to study the effect of different coating materials on drug release and lag time. Tablets selected for stability study were those showing lag time of 5-7 hours followed by complete drug release; F2, F3, F7, F8, and F12. The in-vivo study was carried out on tablets with the highest t90 as compared to commercial tablets after being administered to healthy human volunteers where plasma Ep and urinary Na/K ratio were determined. Results suggested that this approach was able to provide delayed release Ep formulations that will be useful for patients with morning surge in blood pressure.
ABSTRACT
ABSTRACT: The objective of this research was to evaluate the influence of salinity on the absorption and utilization of nutrients by cassava. For the study, cassava was submitted to four saline concentrations: 0, 20, 40, and 60mM NaCl. Results showed that the absorption of all nutrients, except nitrogen (N), was reduced by salinity, with highest reduction for potassium (K). However, all nutrients were maintained at concentrations which did not indicate mineral deficiency problem. The abnormal concentration of calcium in the tuberous roots may have been one of the factors that contributed to the lower growth of this organ and of the plant as a whole. Transports of nitrogen, potassium, phosphorus and sulfur from root to the aerial part was higher under salinity treatment. Efficiency in the use of all the nutrients, mainly N, was reduced due to salinity. Given that: (i) the absorption of K was the most impaired, (ii) there was abnormal accumulation of Ca in tuberous roots, and (iii) the efficiency in the use of N was the most affected, it is suggested to prioritize studies on these three issues, as a way to better understand the aspects related to the tolerance/sensitivity of cassava plants to salinity.
RESUMO: O objetivo deste trabalho foi o de avaliar a influência da salinidade sobre a absorção e utilização de nutrientes pela mandioca. Para o estudo, as plantas foram submetidas a quatro concentrações salinas: 0, 20, 40 e 60mM de NaCl. Os resultados mostraram que a absorção de todos os nutrientes, exceto o nitrogênio (N), foi reduzida pela salinidade, com maior redução para o potássio (K). No entanto, todos os nutrientes foram mantidos em concentrações que não indicaram problema de deficiência mineral. A concentração anormal de cálcio nas raízes tuberosas pode ter sido um dos fatores que contribuíram para o menor crescimento desse órgão e da planta como um todo. Os transportes de nitrogênio, potássio, fósforo e enxofre da raiz para a parte aérea foram maiores sob tratamento com salinidade. A eficiência no uso de todos os nutrientes, principalmente N, foi reduzida devido à salinidade. Considerando que: (i) a absorção de K foi a mais prejudicada, (ii) houve acúmulo anormal de Ca nas raízes tuberosas e (iii) a eficiência no uso de N foi a mais afetada, sugere-se priorizar estudos sobre estas três questões, como forma de melhor entender os aspectos relacionados à tolerância/sensibilidade das plantas de mandioca à salinidade.
ABSTRACT
OBJECTIVES: The purpose of this study was to evaluate the main sources of dietary sodium and potassium intake in Koreans by gender, age and regions. METHODS: We used the data from 2010-2012 KNHANES. A total of 20,387 subjects aged 8 years and older were included. Intakes were compared by gender, age (8-18, 19-49 and >50 years) and geographical regions in Korea. Dishes were classified into 28 dish groups based on cooking methods. Statistical analysis was performed by using the SAS 9.3 and SUDAAN 11.0.1 software. RESULTS: The mean sodium intake of Koreans was 4866.5 ± 35.9 mg/day, which was 2.4 times higher than the adequate intake (AI) of sodium for Koreans. We found that daily sodium intakes were significantly different by age, gender and regions. Men and aged over 50 years had significantly higher sodium intake than women and other age groups. The mean potassium intake in Koreans was 3002.2 ± 19.4 mg/day and daily potassium intakes were significantly different by age, gender and regions. Women and age 50 years and over had significantly higher potassium intakes than men and other age groups. The average Na/K ratio was 2.89 ± 0.01 and was highest in men and in the age group of 19-49 years. The major sources of dietary sodium were soup and stew, followed by Kimchi, noodles and dumpling, pickled vegetables and seasonings, which represented 63.1 % of total sodium intakes. Soup and stew or Kimchi were the primary sources of dietary sodium intake. The major sources of dietary potassium were cooked rice, followed by soup and stew, Kimchi, fruits and beverages. CONCLUSIONS: Sodium and potassium intakes and the major sources of those were significantly different by gender, age groups and regions. Therefore, different approaches based on gender, age and regions are needed to decrease sodium intake and increase potassium intake.
Subject(s)
Female , Humans , Male , Beverages , Cooking , Fruit , Korea , Nutrition Surveys , Potassium , Potassium, Dietary , Seasons , Sodium , Sodium, Dietary , VegetablesABSTRACT
BACKGROUND/AIMS: Transtubular potassium gradient(TTKG) is known as the most accurate indicator of aldosterone activity. TTKG may be used to monitor the effectiveness of aldosterone antagonist which is prescribed generally for the management of cirrhotic ascites. Spot urine [Na]/[K] ratio may also be used for the same purpose. METHODS: After measuring TTKG, spot urine [Na]/[K] ratio, and plasma aldosterone concentration in each of the 23 patients all who had cirrhotic ascites, 100 mg of spiron-olactone was prescribed to be taken daily for 5 days. When no diuretic response occurred and TTKG was more than 3.5 at the end of 5 days, the dose of spironolactone was increased by 100 mg/day at the interval of 5 days until TTKG decreased to below 3.5. Furosemide was added to the non-responders if their TTKG had dropped to below 3.5. RESULTS: Basal plasma concentration of aldosterone was higher than upper normal limit in 13(57%) patients, and correlated with TTKG significantly(r=0.60, p=0.002). TTKG was calculated to be 3.5+/-0.67 when assuming the aldosterone activity has been completely blocked. Spot urine [Na]/[K] ratio had significant negative correlation with TTKG before and after the administration of spironolactone. In most patients, diuretic response appeared with the fall of TTKG (especially below 3.5) and with the rise of spot urine [Na]/[K] ratio. In patients who did not respond to a low dose spironolactone, further treatment plan (to increase dose of spironolactone or to add furosemide) was guided by TTKG, and all were successful. CONCLUSIONS: TTKG and spot urine [Na]/[K] ratio are good indicators of aldosterone activity, and might be used as useful guidelines in the diuretic management of cirrhotic ascites.