Despite decades of research on marine algae, there are still significant gaps in basic knowledge about chemical composition of these organisms, especially in tropical environments. In this study, the amino acid compos...Despite decades of research on marine algae, there are still significant gaps in basic knowledge about chemical composition of these organisms, especially in tropical environments. In this study, the amino acid composition and contents of total nitrogen, phosphorus, lipid, carbohydrate and protein were determined in Asparagopsis taxiformis, Centroceras clavulatum, Chaetomorpha aerea, Sargassum filipendula and Spyridia hypnoides. The seaweeds showed low lipid contents (lower than 5.5% d.w. in all species) and were rich in carbohydrates (more than 16% d.w. in all seaweeds). The percentage of nitrogen, phosphorus and protein varied widely among species, which red algae showed the highest con-centrations. The amino acid composition was similar among the seaweeds, which glutamic acid, aspartic acid and leu-cine as the most abundant. All species are poor in histidine. An average of 24.2% of the total nitrogen is non-proteinaceous. From data of total amino acid and total nitrogen, specific nitrogen-to-protein conversion factors were calculated for each species. The nitrogen-to-protein conversion factors calculated ranged from 4.51 to 5.21, with an overall average of 4.86. These findings show that the traditional conversion factor of 6.25 should be avoided for seaweeds, since it overestimates the actual protein content.展开更多
The formation and evolution of cosmic string wakes in the framework of a <i>f</i>(<i>R</i>) theory of gravity are investigated in this work. We consider a simple model in which baryonic matter ...The formation and evolution of cosmic string wakes in the framework of a <i>f</i>(<i>R</i>) theory of gravity are investigated in this work. We consider a simple model in which baryonic matter flows past a cosmic string. We treat this problem in the Zel’dovich approximation. We compare our results with previous results obtained in the context of General Relativity and Scalar-Theories of Gravity.展开更多
In order to evaluate the safety and efficacy of Borago officinalis (900 mg borage oil capsules) in the treatment of patients presenting with cyclic mastalgia, 91 subjects were included in the study. Efficacy assessmen...In order to evaluate the safety and efficacy of Borago officinalis (900 mg borage oil capsules) in the treatment of patients presenting with cyclic mastalgia, 91 subjects were included in the study. Efficacy assessments were performed based on data obtained prior to the start of treatment (Pretreatment), and after each menstrual cycle (Assessment 2—following 45 days of treatment;and Assessment 3—at the end of the 90-day treatment period). Primary efficacy measures considered the results of the Mastalgia Questionnaire, including a 100 mm visual analog pain scale assessing mean, most intense mastalgia severity, and impact on work, sleep, and sexual activity. Safety and tolerability measures included any changes in vital signs and physical exam in relation to pretreatment, any changes in clinical laboratory exams in relation to pretreatment, and the occurrence of adverse events after the first dose of study medication. The VAS scores of the mean mastalgia and most severe mastalgia both showed statistically significant展开更多
基金Authors are indebted to Brazil’s National Council for Scientific and Technological Development(CNPq)and Research Support Foundation of Rio de Janeiro State(FAPERJ)for the financial support of this studyGDS thanks Coordination of Improvement of Higher Education Personnel(CAPES)for her scholarshipAuthors thank Dr.Renato Crespo Pereira(UFF)for the use of labora-tory facilities and to Dr.Joel C.De-Paula(UNIRIO)for confirming the identification of the seaweeds.
文摘Despite decades of research on marine algae, there are still significant gaps in basic knowledge about chemical composition of these organisms, especially in tropical environments. In this study, the amino acid composition and contents of total nitrogen, phosphorus, lipid, carbohydrate and protein were determined in Asparagopsis taxiformis, Centroceras clavulatum, Chaetomorpha aerea, Sargassum filipendula and Spyridia hypnoides. The seaweeds showed low lipid contents (lower than 5.5% d.w. in all species) and were rich in carbohydrates (more than 16% d.w. in all seaweeds). The percentage of nitrogen, phosphorus and protein varied widely among species, which red algae showed the highest con-centrations. The amino acid composition was similar among the seaweeds, which glutamic acid, aspartic acid and leu-cine as the most abundant. All species are poor in histidine. An average of 24.2% of the total nitrogen is non-proteinaceous. From data of total amino acid and total nitrogen, specific nitrogen-to-protein conversion factors were calculated for each species. The nitrogen-to-protein conversion factors calculated ranged from 4.51 to 5.21, with an overall average of 4.86. These findings show that the traditional conversion factor of 6.25 should be avoided for seaweeds, since it overestimates the actual protein content.
文摘The formation and evolution of cosmic string wakes in the framework of a <i>f</i>(<i>R</i>) theory of gravity are investigated in this work. We consider a simple model in which baryonic matter flows past a cosmic string. We treat this problem in the Zel’dovich approximation. We compare our results with previous results obtained in the context of General Relativity and Scalar-Theories of Gravity.
文摘In order to evaluate the safety and efficacy of Borago officinalis (900 mg borage oil capsules) in the treatment of patients presenting with cyclic mastalgia, 91 subjects were included in the study. Efficacy assessments were performed based on data obtained prior to the start of treatment (Pretreatment), and after each menstrual cycle (Assessment 2—following 45 days of treatment;and Assessment 3—at the end of the 90-day treatment period). Primary efficacy measures considered the results of the Mastalgia Questionnaire, including a 100 mm visual analog pain scale assessing mean, most intense mastalgia severity, and impact on work, sleep, and sexual activity. Safety and tolerability measures included any changes in vital signs and physical exam in relation to pretreatment, any changes in clinical laboratory exams in relation to pretreatment, and the occurrence of adverse events after the first dose of study medication. The VAS scores of the mean mastalgia and most severe mastalgia both showed statistically significant
