Bạn đang xem bản rút gọn của tài liệu. Xem và tải ngay bản đầy đủ của tài liệu tại đây (168.8 KB, 2 trang )
duetoanumberoforganicacids,notably
oxalicacid,whichcontributesaboutatenthof
thetotalacidityof2–2.5%.(Thisisdoubleor
tripletheoxalatecontentofspinachand
beets.)Rhubarbleavesaresaidtobetoxicin
partduetotheirhighoxalatecontent,asmuch
as1%oftheleafweight,butotherchemicals
areprobablyalsoresponsible.Todayrhubarb
isavailablemuchoftheyearthanksto
greenhouseproduction,thoughsomecooks
preferthemoreintenseflavorandcolorofthe
field-growncropoflatespring.Thecolorof
redstalksisbestpreservedbyminimizing
boththecookingtimeandthequantityof
addedliquid,whichdilutesthepigments.
FruitsFromWarm
Climates:Melons,Citrus
Fruits,TropicalFruits,
andOthers
Melons
Exceptforthewatermelon,melonsarefruits
ofCucumismelo,acloserelativeofthe
cucumber(C.sativus)andanativeofthe
semiaridsubtropicsofAsia.Themelonplant
wasdomesticatedincentralAsiaorIndiaand
arrivedintheMediterraneanatthebeginning
ofthe1stcenturyCE,wheretheirlargesize
andrapidgrowthmadethemacommon