Elemental composition of tree nuts

Composition of Pecan Cultivars Wichita and Western Schley [Carya illinoinensis(Wangenh.) K. Koch] Grown in Australia

“…However, the copper levels (0.5 mg/100 g) were lower than the values reported by Sparks (36) (1.0 mg/100 g), Senter (37) (1.1 mg/100 g), and Furr et al (38) (1.5 mg/ 100 g), whereas the manganese levels were slightly higher in our study. Although the results for calcium in this study generally conform to those of Sparks (36) (36 mg/100 g) and Furr et al (38) (61.8 mg/100 g), a value of only 5.8 mg/100 g (dry weight) as reported by Senter (37) is much lower than the value (55 mg/100 g) found in this study.…”

“…However, the levels of magnesium, sodium, and zinc changed significantly (p < 0.05) with year of harvest, whereas the levels of manganese, sodium, and zinc all changed significantly (p < 0.05) with cultivar. The concentration of each of the minerals tested during this study (Tables 6 and 7) is generally comparable to those of Sparks (36), Senter (37), and Furr et al (38). However, the copper levels (0.5 mg/100 g) were lower than the values reported by Sparks (36) (1.0 mg/100 g), Senter (37) (1.1 mg/100 g), and Furr et al (38) (1.5 mg/ 100 g), whereas the manganese levels were slightly higher in our study.…”

Brazil nut (Bertholletia excelsa HBK) proteins: fractionation, composition, and identification of a sulfur-rich protein

“…lane E, there is no preferential extraction of the 2S albumin fraction; the water extract contains the same protein components as those extracts made with other buffers. Brazil nuts have an unusually high content of several elements, particularly Ba, Br, Co, Cs, Ca, Mg, Sr, and Se (Furr et al 1979); these elements, plus other ions in the seeds, may be sufficient to cause the solubilization of the globulins during the water extraction. But, we have been able to remove the globulins in this water extract by acid precipitation (Sun and Hall, 1975) and a subsequent step of extensive dialysis against deionized water.…”

Brazil nuts: an effective way to improve selenium status

“…However, consumption on a daily basis should be limited to no more than a few nuts to avoid accumulation of selenium in the tissues. Furthermore, Brazil nuts provide unusually high and variable concentrations of barium and radium (31), which accumulate because of the extensive root system of the tree. Although adequate chronic oral studies in rats and mice have not shown carcinogenic effects of the barium intake from a few nuts, there is still uncertainty about the biological effects of consumption in humans and the reference dose for this element (32).…”