Can the use of calcium supplements at a dosage of 200 mg daily help maintain fat-free mass in adults?5 answersCalcium supplementation at a dosage of 200 mg daily may not significantly impact fat-free mass in adults. Research indicates that higher calcium intake, whether from supplements or dietary sources, can aid in weight regulation and body fat reduction in adolescents and adults. However, a systematic review found that calcium supplements (1,200 mg/day) led to only a small reduction in body weight and body fat in overweight and obese individuals. Additionally, a study on calcium supplementation (1,000 mg/day) in obese adults showed no significant changes in weight or body composition after 24 weeks. Therefore, while calcium intake may have some benefits for weight management, particularly in reducing obesity risk and insulin resistance, a dosage as low as 200 mg daily may not have a substantial impact on maintaining fat-free mass in adults.
How can CaO biochar prepared?5 answersCaO biochar can be prepared through various methods involving the modification of biochar with calcium oxide. One approach involves the in-situ precipitation of CaO2 on biochar, resulting in innovative biochar-loaded CaO2 with enhanced oxygen-releasing properties. Another method includes synthesizing CaO/bio-char through the co-pyrolysis of Ca(OH)2 and biomass like rice straw, creating a catalyst for the pyrolysis of soybean oil to produce high-quality biofuel. Additionally, the preparation of calcium-modified biochar can be achieved by loading biomass powder with calcium ions, followed by pyrolysis to obtain the desired calcium modified biochar, which exhibits excellent adsorption capabilities for phosphate and can be utilized for wastewater treatment and soil improvement. These methods showcase the versatility and effectiveness of utilizing CaO in biochar preparation for various applications.
What are the challenges of using CaO-based solids to capture CO2?5 answersCaO-based solids face several challenges in capturing CO2. One challenge is the degradation of the sorbent due to sintering-induced agglomeration, which negatively impacts the solid inventory and plant operation. Another challenge is the influence of realistic flue gas conditions, such as the presence of H2O and O2, on the performance of the sorbent. While H2O promotes the kinetics of CO2 capture, O2 oxidizes the sorbent and hinders the utilization of captured CO2. Additionally, the presence of alkali metal salt promoters, such as K2CO3, can affect the cyclic performance of CaO-based sorbents. Low amounts of K2CO3 improve the cyclic performance, but large amounts reduce the positive effect on CO2 uptake performance. Furthermore, the carbonation reactivity of CaO sorbents can decay over cycles, but this can be mitigated by using organic acid-rich torrefaction condensate (TC) as an acidification treatment. Overall, these challenges need to be addressed to enhance the CO2 capture performance of CaO-based solids.
Is merlin free?3 answersYes, the e-MERLIN software package is available for free download from the e-MERLIN website or via Github.
What do you think makes us free in philosophy?5 answersHumans are free in philosophy because of their distinctive psychological features, such as remarkable powers of prospection and creativity, which enable them to construct option sets of unparalleled size and diversity. This latitude for self-expression allows humans to express themselves in countless ways, giving them the freedom to explore and choose from a wide range of options. Additionally, freedom in philosophy is not about conforming to common problems or arguments, but rather about avoiding the tradition of "metaphysics" or "ontology" and embracing the responsibility of independent thinking. It is about breaking free from the constraints of everyday life and finding stability and a sense of self in the midst of change and passing. Ultimately, freedom in philosophy requires the courage to weed out previously held beliefs and the willingness to accept that truth may not always be pleasant, good, or beautiful.
What research was done by E. Freedman?5 answersE. Freedman conducted research on the analgesic activity of synthesized samples of new cyanothioacetamide derivatives in the classic hot plate test on white rats.