Data of calcium content, digestibility and bioaccessibility of Moringa oleifera, spinach and sweet potato leaves

Calcium content digestibility and bioaccessibility
Data of three experiments are reported. Sample identifiers: S1=spinach; S.P. 2= Sweet potato leaf; M3 = Moringa from India; M4 = Moringa from Karonga, Malawi; M5 = Moringa from Lillongwe, Malawi (the last digit refers to replicate within experiment). The leaf number indicates the numerical value corresponding to the sample identifier in column B. Plant total calcium: the percentage of calcium measured in the dry plant tissue by atomic absorption. Initial inside (ml): volume inserted into dialysis tubing. Intial outside (ml): volume outside dialysis tubing. Initial Ca A.A (ppm): calcium concentration inside dialysis tubing. Initial Ca (mg): quantity of calcium initially in the dialysis tubing (G x E, corrected for the volume removed for measurement). Total Volume (ml): Total volume of the system that is accessible to the bioaccessible calcium. Final Ca overall: mg of Ca inhabiting the entire accessible volume, calculated in experiment 1 as Ca concentration outside the dialysis tubing times the accessible volume, and in experiments 2 and 3 as the difference between initial and final content of calcium inside the dialysis tubing times the accessible volume. Ca dialyzed: percentage of plant total calcium introduced to the dialysis tubing (digestible Ca) that was recovered in the accessible volume at the end of the experiment. Ca digested: digestible calcium calculated as the percentage of the plant total calcium found in the filtrate fluid after enzymatic digestion of the plant material. Ca dialyzed of dry matter Ca: bioaccessible calcium. The percentage of the plant total calcium that is bioaccessible is calculated as the product of the percentage of Ca dialyzed x the percentage of Ca digested, divided by 100.

本数据集报告了三次实验的钙含量消化率和生物可及性数据。样品标识：S1=菠菜；S.P. 2=甘薯叶；M3=来自印度的摩罗迦树；M4=来自马拉维卡龙加的摩罗迦树；M5=来自马拉维利隆圭的摩罗迦树（最后一位数字表示实验内的重复次数）。叶片编号指示与列B中样品标识相对应的数值。植物总钙含量：通过原子吸收法测量的干植物组织中的钙含量百分比。初始内体积（毫升）：注入透析管的体积。初始外体积（毫升）：透析管外的体积。初始Ca A.A（ppm）：透析管内的钙浓度。初始Ca（mg）：初始存在于透析管中的钙量（G x E，已校正为测量时移除的体积）。总体积（毫升）：系统中可生物可及钙的总体积。最终Ca总量：占据整个可及体积的钙的毫克数，在实验1中计算为透析管外钙浓度乘以可及体积，在实验2和3中计算为初始和最终透析管内钙含量之差乘以可及体积。Ca透析：引入透析管中的植物总钙的百分比（可消化钙）在实验结束时在可及体积中回收的百分比。Ca消化：通过植物材料酶解后滤液中的植物总钙百分比计算的可消化钙。干物质Ca的Ca透析：生物可及钙。植物总钙中生物可及的百分比计算为Ca透析百分比乘以Ca消化百分比，再除以100。