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averrhoa_carambola_l [2017/01/22 09:22]
andreas
averrhoa_carambola_l [2017/02/12 09:25] (aktuell)
andreas
Zeile 13: Zeile 13:
 [Morton, Julia Frances. Fruits of warm climates. JF Morton, 1987, 125-128] [[https://hort.purdue.edu/newcrop/morton/carambola.html]]  [Morton, Julia Frances. Fruits of warm climates. JF Morton, 1987, 125-128] [[https://hort.purdue.edu/newcrop/morton/carambola.html]] 
  
-An aroma extract prepared from stored fruits was described as sweet, estery and fruity (peach/apricot/plum-like). Quantitatively, the most abundant components were hydrocarbons like tricose-1-ene (21.4%) and pentacose-1-ene (10.3%) and acids like linoleic acid (15.5%) and palmitic acid (12.3%). 57 esters accounted for 9.0%, providing fruiy shades. methyl N-methyl anthranilate (2.4%), methyl anthranilate (0.7%), and ethyl N-methyl anthranilate (0.2%) provide grape-like notes. As the odor of starfruit is described as peach/apricot/plum-like, γ-lactones (peach-like, C10 0.4%, C11 0.05%, C12 1.8%) and δ-lactones (apricot-like, C11 trace, C12 0.07%, C13 1.5%) are sensory important. Very potent odorants are carotenoid degradation products, a number of them were identified: geranyl acetone (0.3%), β-ionone (0.8%), β-demascenone (0.02%), (E)- and (Z)-dehydro-β-ionone (0.1%, trace), β-ionol (0.9%), and 4-hydroxy-β-iononl (0.05%), as well as some interesting megastigma-4,6,8-trienes (rose-raspberry, E,E 0.3%, E,Z 0.2%, Z,E 0.9%, Z,Z 0.07%) and oxo-derivatives like megastigma-5,8(E)-dien-4-one (0.3%) and megastigma-5,8(Z)-dien-4-one (0.1%). \\+An aroma extract prepared from stored fruits was described as sweet, estery and fruity (peach/apricot/plum-like). Quantitatively, the most abundant components were hydrocarbons like tricose-1-ene (21.4%) and pentacose-1-ene (10.3%) and acids like linoleic acid (15.5%) and palmitic acid (12.3%). 57 esters accounted for 9.0%, providing fruiy shades. Methyl N-methyl anthranilate (2.4%), methyl anthranilate (0.7%), and ethyl N-methyl anthranilate (0.2%) provide grape-like notes. As the odor of starfruit is described as peach/apricot/plum-like, γ-lactones (peach-like, C10 0.4%, C11 0.05%, C12 1.8%) and δ-lactones (apricot-like, C11 trace, C12 0.07%, C13 1.5%) are sensory important. Very potent odorants are carotenoid degradation products, a number of them were identified: geranyl acetone (0.3%), β-ionone (0.8%), β-damascenone (0.02%), (E)- and (Z)-dehydro-β-ionone (0.1%, trace), β-ionol (0.9%), and 4-hydroxy-β-iononl (0.05%), as well as some interesting megastigma-4,6,8-trienes (rose-raspberry?, E,E 0.3%, E,Z 0.2%, Z,E 0.9%, Z,Z 0.07%) and oxo-derivatives like megastigma-5,8(E)-dien-4-one (0.3%) and megastigma-5,8(Z)-dien-4-one (0.1%). \\
 [Volatile components of starfruit., MacLeod, G., Ames, J.M., Phytochemistry, 29(1), 1990, 165-172] [Volatile components of starfruit., MacLeod, G., Ames, J.M., Phytochemistry, 29(1), 1990, 165-172]
  
Zeile 19: Zeile 19:
 [Ray, P.K. (2002), Breeding tropical and subtropical fruits, New Delhi: Narosa Pub. Pub. House, 307-309] [Ray, P.K. (2002), Breeding tropical and subtropical fruits, New Delhi: Narosa Pub. Pub. House, 307-309]
  
 +----
 +
 +"The starfruit neurotoxin caramboxin is metabolized and excreted by the kidneys. In healthy individuals caromboxin is readily flushed from the body, but in compromised individuals with renal disease or failure, it accumulates and signs of neurotoxicity, such as the dreaded hiccups, begins. I’ve seen starfruit consumption discouraged, or forbidden, for those with kidney failure or on dialysis, but not nearly frequently enough... consumption of large amounts of starfruit induces oxalate crystal nephropathology and acute renal failure (or exacerbates an existing disorder), preventing the clearance of caramboxin, leading to neurotoxicity in the form of hiccups. Once renal dysfunction clears up, the hiccups go away." \\
 +Aqueous solutions of caramboxin lose their biological activity after a few hours. Caramboxin undergoes an intramolecular cyclization (condensation) to an inactive compound. \\
 +[[https://naturespoisons.com/2015/10/01/starfruit-which-came-first-the-hiccups-or-the-kidney-failure-caramboxin/]] \\
 +[Neto, M. M., da Costa, J. A. C., Garcia‐Cairasco, N., Netto, J. C., Nakagawa, B., & Dantas, M. (2003). Intoxication by star fruit (Averrhoa carambola) in 32 uraemic patients: treatment and outcome. Nephrology Dialysis Transplantation, 18(1), 120-125] [[https://academic.oup.com/ndt/article/18/1/120/1809123/Intoxication-by-star-fruit-Averrhoa-carambola-in]]
 + \\
 +[Garcia‐Cairasco, N., Moyses‐Neto, M., Del Vecchio, F., Oliveira, J. A., dos Santos, F. L., Castro, O. W., ... & Dagostin, A. L. (2013). Elucidating the neurotoxicity of the star fruit. Angewandte Chemie International Edition, 52(49), 13067-13070] \\
  
 {{:avarrhoa_carambola.jpg?600}} \\ {{:avarrhoa_carambola.jpg?600}} \\
averrhoa_carambola_l.1485073331.txt.gz · Zuletzt geändert: 2017/01/22 09:22 von andreas