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maslinovo ulje i przenje, dinstanje...

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maslinovo ulje i przenje, dinstanje...

PostPostao/la † Sanika » 16 kol 2010, 22:42

Moj m, prehrambeni tehnolog, kaze da je zagrijavanje maslinovog ulja, ekstra djevicanskog, na temperature za dinstanje i przenje kancerogeno. Zato što oksidiraju nezasicene masne kiseline, i onda se oslobadjaju stetni slobodni radikali (pucaju lanci)...
Isto se dogadja i s ostalim uljima ali ne u tolikoj mjeri, i nesto je bolja situacija kod ulja za przenje zbog dodatka antioksidansa (što je i navedeno na deklaraciji ulja za prženje)...

Kako vi koristite maslinovo ulje i na cemu malcima dinstate?? I sta mislite o gore napisanom? :mah
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Re: maslinovo ulje i przenje, dinstanje...

PostPostao/la silki » 16 kol 2010, 22:44

koliko sam ja pokopčala do sad, rođena dalmošica, dinstanjem i prženjem samo gubi na kvaliteti. ništa više.
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Re: maslinovo ulje i przenje, dinstanje...

PostPostao/la Mrđi » 16 kol 2010, 22:53

to gore sam i ja cula i to od jednog ribara. on kaze, maslinovo ulje ide na jelo a ne "pod" jelo. na njemu se ne prži i ne dinsta samo mu ubijas hranjive tvari.
Samo se srcem dobro vidi, bitno je očima nevidljivo. (Mali Princ)
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Re: maslinovo ulje i przenje, dinstanje...

PostPostao/la silki » 16 kol 2010, 22:54

sanika, oft viđaj si ponicka :lol
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Re: maslinovo ulje i przenje, dinstanje...

PostPostao/la thalia » 16 kol 2010, 22:59

silki je napisao/la:koliko sam ja pokopčala do sad, rođena dalmošica, dinstanjem i prženjem samo gubi na kvaliteti. ništa više.


to sam i ja čula.
i stvarno bih rado vidjela dokaz da postaje kancerogeno zagrijavanjem jer me to progoni :loce

Sanika, najstabilniji za prženje su ti svinjska mast, kokosovo ulje i ghee.
dinstanje s vodom i maslinovim navodno ne dostiže te neke strahobalne temperature.
a prženje ionako nije zdravo :mrgreen
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Re: maslinovo ulje i przenje, dinstanje...

PostPostao/la thalia » 16 kol 2010, 23:11

evo šta kaže prijatelj Gugle

Myth. Heating olive oil will evaporate the alcohols and esters which
make up the delicate taste and fragrance of olive oil. Heating olive
oil will not change its health aspects appreciably. All oils will
oxidize if repeatedly heated to high temperatures. Olive Oil seems to
be more resistant to this. Heating olive oil will not change it from a
monosaturated fat which is considered far healthier than the
polyunsaturated fats in margarine or the cholesterol in butter. When
olive oil and other vegetable oils are subjected to heating a lower
amount of undesirable TRANS fatty acids are formed in olive oil than
in the other oils. Use a cheaper, less flavorful pure oil for frying
and a more flavorful extra virgin olive oil on salads and as a
condiment at the table."


izvor http://www.oliveoilsource.com/newslette ... ews5-3.htm

The Facts: As far as making a saturated fat, according to Dr. A.
Kiritsakis, a world renowned oil chemist in Athens, (Book - OLIVE OIL
FROM THE TREE TO THE TABLE -Second edition 1998), all oils will
oxidize and hydrogenate to a tiny degree if repeatedly heated to very
high temperatures such as is done in commercial frying operations.
Olive pomace oil and virgin olive oil are both highly monounsaturated
oils and therefore resistant to oxidation and hydrogenation. Studies
have shown oxidation and hydrogenation occurs to a lesser degree in
olive oil than in other oils. But in any case, the amount of trans
fat formed is miniscule and no home cook would ever experience this
problem.

The large refinery-like factories which take unsaturated vegetable oil
and turn it into margarine or vegetable lard do so by bubbling
hydrogen gas through 250 to 400 degree hot vegetable oil in the
presence of a metal catalyst, usually nickel or platinum. The process
can take several hours. You cannot make a saturated product like
margarine at home by heating olive oil or any other vegetable oil in a
pan. We don't know where this weird notion has come from. For more
see our olive oil chemistry page

Changing a cis-fat to a trans-fat does not occur on a home stove.


"Trans Fatty acids: Olive oil has no trans fatty acids. When an oil
is partially hydrogenated it can be in the cis or trans conformation
which refers to which side of the fatty acid double bond the hydrogen
is on. Olive oil is not a trans fatty acid because it has not been
partially hydrogenated in a factory to make it solid at room
temperature like margarine has. Trans fat is created by bubbling
hydrogen through 250 to 400 degree hot vegetable oil in the presence
of a metal catalyst, usually nickel or platinum. The process can take
several hours. You cannot accidentally make trans or saturated fatty
acids at home on your range when heating olive oil or other oils."


mislim da smo sigurni ;)
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Re: maslinovo ulje i przenje, dinstanje...

PostPostao/la Ina66 » 16 kol 2010, 23:16

thalia :5

ja sam išla direktno na poznati mi izvor :)

Oils that are best to use for high heat cooking include those with higher smoke points. These would include high-oleic safflower oil (smoke point: 450ºF/232ºC), high-oleic sunflower oil (smoke point: 450ºF/232ºC), avocado oil (smoke point: 520ºF/271ºC), or refined coconut oil (smoke point: 450ºF/232ºC). Also, you may consider ghee, which has a smoke point of 400˚-500˚F (204˚-260˚C).

As you'll note, the only oil we include on our website is extra virgin olive oil. At the heart of the Mediterranean diet, extra virgin olive oil is rich in monounsaturated fats and polyphenol antioxidants and has found to be heart healthy. Yet, we don't like to cook with extra virgin olive oil (the highest we'll cook with it is up to 250˚F121˚C, which is fine for making sauces or heating up a dish but not high enough for sautéing).

The reason we don't like to heat extra virgin olive oil to higher temperatures is because it has a lower smoke point than the other oils mentioned. All vegetable oils are susceptible to heat damage-much more so than the whole foods from which they were pressed or extracted. But in the case of extra virgin olive oil, the susceptibility is especially great, notably in the destruction of its polyphenolic phytonutrients. Extra virgin olive oil has such a great flavor let alone an amazingly rich nutrient profile that we want to preserve so we don't like to cook with it but rather enjoy it as a salad dressing or drizzled on foods after they have been cooked.


http://www.whfoods.com/genpage.php?tname=newtip&dbid=47
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Re: maslinovo ulje i przenje, dinstanje...

PostPostao/la Beppa Joseph » 17 kol 2010, 05:06

Da potvrdim prethodne postove...

MM se bavi maslinama, a ne uljem, no kako je to usko vezano išao je prošle godine na kongres o uljima ( http://www.eurofedlipid.org/meetings/ar ... /index.htm ) i tamo je bilo riječi upravo o tome, meni sad nisu dostupni radovi s kongresa, no ako netko ima pristup bazi znanstvenih radova, lako će ih naći.

Ukratko, ne postoji nikakva opasnost od kancerogenosti maslinovog ulja. Mi obično biljno ulje gotovo da i ne koristimo, jedino u mješavini za prženje, za palačinke i sl, boca mi traje barem tri mjeseca. Za sve ostalo kuhanje (a zapravo pržim vrlo rijetko, uglavnom dinstam) koristim maslinovo. Jedino što koristimo ulja različite kvalitete pa zagrijavamo samo ono lošije. Meni ne smrdi, zapravo obično ulje mi smrdi više.
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Re: maslinovo ulje i przenje, dinstanje...

PostPostao/la LiKmama » 17 kol 2010, 10:56

Hvala!
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Before you decide to criticize someone, try walking a mile in their shoes. That way, if you do decide to criticize them, you'll not only be a mile away but you'll have their shoes as well.
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Re: maslinovo ulje i przenje, dinstanje...

PostPostao/la eli » 17 kol 2010, 12:00

niti jedno ulje se ne bi smijelo zagrijavati do "smoke point"- a. to nitko ni ne radi. ako se slučajno pregrije, osjeti se loš miris i to se ulje baci.
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Re: maslinovo ulje i przenje, dinstanje...

PostPostao/la † Sanika » 17 kol 2010, 22:37

u pravu ste ;) google je u pravu, moj m nije :lol a rekla sam mu da nije pa mi nije vjerovao, zato sam i postala, znala sam da ću saznati pravu istinu o maslinovom ulju :kiss :D

nego da budem sigurna, pitala sam u međuvremenu i mm-ovu seku štrebericu, koja je također diplomirala i magistrirala prehrambenu tehnologiju i još radi na faksu, i ona kaže DA za maslinovo ulje i za dinstanje na njemu i za pečenje i za prženje i naravno na hladno :) da nejdem u detalje, ali mogu ako želite kopirati njen e mail s podugačikm objašnjenjem :mah
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Re: maslinovo ulje i przenje, dinstanje...

PostPostao/la † Sanika » 20 kol 2010, 15:11

Da nastavim...

Evo danas sam dinstala luk na maslinovom ulju, na plinskom stednjaku jer drugi na moru nemamo, i zadimilo se za 10 sec.
Sve sam bacila. Krenula ponovo, smanjila vatru..i makla za 5 sec jer se dim opasno priblizavao.. To nije ni dinstanje, umocila sam luk u toplo maslinovo ulje...

Navodno da vrh plina, vatra, ima 700 do 800 stupnjeva celzijusovih..krasno. Pa ti dinstaj zdravo. Nema sanse. Zdravije je po tome prziti u fritezi gdje temperaturu mozes podesiti :roll

No ono sto sam zapravo htjela dodati je to, da jos uvijek nismo saznali sta je stetnije kad se dosegne taj smoke point / izgaranje (jer kako ga uopce izbjeci kod dinstanja????? - otkrijte mi tajnu, meni se krene dimiti) jer maslinovo ulje i dalje ima izgaranje na nizoj temperaturi od obicnih ulja...i iako zdravije, prije postaje stetno jer nakon smoke pointa svako ulje postaje stetno, kancerogeno..

Nauka...ali rado bi cula nesto od onih koji o tome nesto vise od mene znaju, ali ne preko googla :mrgreen :mah
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Re: maslinovo ulje i przenje, dinstanje...

PostPostao/la Masha » 20 kol 2010, 15:30

frižiš uvijek na laganoj vatri. kad dinstaš npr. luk, čim se zastakli podliješ s malo vode.
meni nikad nema tog dimnjenja. :dunno
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Re: maslinovo ulje i przenje, dinstanje...

PostPostao/la † Sanika » 20 kol 2010, 15:45

Masha je napisao/la:frižiš uvijek na laganoj vatri. kad dinstaš npr. luk, čim se zastakli podliješ s malo vode.
meni nikad nema tog dimnjenja. :dunno


da, tak radim, doma mi se ne dimi na kreamickoj ploci, ovdje na plinu, koma :roll

edit: bar mislim da se ne dimi, javim kad dodjem doma :lol
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Re: maslinovo ulje i przenje, dinstanje...

PostPostao/la † Sanika » 06 ruj 2010, 18:51

dimi se kao dinstanja, ma na koliko slaboj vatri radila, i ma koliko polako :conf
nije to onaj smrdljivi dim, ali se dimi, blagi dim se vidi..smoke point dosegnut...
nemrem bas vjerovati da vam se ali ama bas ni malo ne zadimi, onda to nije dinstanje vec umakanje u mlakom ulju :dunno
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Re: maslinovo ulje i przenje, dinstanje...

PostPostao/la eli » 06 ruj 2010, 19:22

to je isparavanje vode. nema šanse da ti kod dinstanja temperatura hrane dođe na onih gore navedenih 250, već jedva prelazi stotku.
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Re: maslinovo ulje i przenje, dinstanje...

PostPostao/la † Sanika » 06 ruj 2010, 19:36

super ako je tako, jesi mozda mjerila?
edit, ako je voda onda jedino iz luka, jer dimi se prije dodavaja vode :dunno

mislim dinstala budem ja i dalje sta bilo da bilo, ali sad me bas zanima taj smoke point :)
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Re: maslinovo ulje i przenje, dinstanje...

PostPostao/la alexandra » 06 ruj 2010, 20:00

ne mora biti samo voda od luka.
ovisi na kako kvalitetnom maslinovom ulju dinstaš :)
ako treba, pišam crveno
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Re: maslinovo ulje i przenje, dinstanje...

PostPostao/la eli » 06 ruj 2010, 20:13

super ako je tako, jesi mozda mjerila?

nisam mjerila zbog mjerenja, ali desilo mi se da se prst slučajno umoči.
250 je stvarno visoko, 2,5 x iznad ključanja vode.

da, voda iz luka je hladna, u dodiru sa toplijim uljem krene isparavanje.

što se ulja tiče, treba se voditi nosem koji nam je majka priroda dala da razabramo opasnosti i fine stvari iz prirode. ako dođe do neugodnog mirisa svako ulje treba baciti.
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Re: maslinovo ulje i przenje, dinstanje...

PostPostao/la Beppa Joseph » 06 ruj 2010, 21:26

Evo i znanstvenih podataka o kojima sam govorila:

Malo prevedeno iz sažetaka (to ja prepričavam mm-ove riječi, a pola toga ne razumijem):

Maslinovo ulje je otporno na degradaciju tijekom prženja na 170 stupnjeva (što se smatra normalnim prženjem) u domaćinstvu, čini se da je to zbog visokog sadržaja fenolnih spojeva, prisutnosti vitamina e i betakarotena. Visok sadržaj mononezasićenih kiselina u maslinovom ulju je idući parametar koji reducira toplinsku degradaciju tijekom prženja u domaćinstvu.
Koncentracija kancerogenog spoja akrilamida se povećava tijekom prženja (taj pokus je bio na čipsu ili pommes fritesu), ali je formiranje tih akrilamida bilo brže u uljima koji su imali nižu koncentraciju fenolnih spojeva Fenoli daju maslinovom ulju pikantnost, po tome ih se najlakše prepoznaje, to je razlog zašto su pikantnija maslinova ulja zdravija. Moji u Dalmaciji još uvijek teško prihvaćaju da je ono oksidirano i užeglo ulje lošije kvalitete. To je okus na koji su navikli. Mojoj se mami nije sviđalo ulje koje mi koristimo, izrazito pikantno.
Ekstradjevičanska maslinovo ulja s najvišom koncentracijom ortodifenolnih spojeva sposobna su učinkovito spriječiti forimranje onih kancerogenih akrilamida.

dakle, upotreba maslinovih ulja bogatih ortodifenolnim spojevima može biti preporučena u sprječavanju formiranja akrilamida tijekom prženja



Sažetci:
2008: Napolitano Aurora; Morales Francisco; Sacchi Raffaele; Fogliano Vincenzo
Relationship between virgin olive oil phenolic compounds and acrylamide formation in fried crisps.
Journal of agricultural and food chemistry 2008;56(6):2034-40.

In this paper the relationship between virgin olive oil (VOO) phenol compounds and the formation of acrylamide in potato crisps was investigated. The phenol compositions of 20 VOO samples were screened by LC-MS, and 4 oils, characterized by different phenol compound patterns, were selected for frying experiments. Slices of potatoes were fried at 180 degrees C for 5, 10, and 15 min, and acrylamide content was determined by LC-MS. Results demonstrated that VOO phenolic compounds are not degraded during frying, and crisp color was not significantly different among the four VOOs. Acrylamide concentration in crisps increased during frying time, but the formation was faster in the oil having the lowest concentration of phenolic compounds. Moreover, the VOO having the highest concentration of ortho-diphenolic compounds is able to efficiently inhibit acrylamide formation in crisps from mild to moderate frying conditions. It was concluded that the use of ortho-diphenolic-rich VOOs can be proposed as a reliable mitigation strategy to reduce acrylamide formation in domestic deep-frying.




Deterioration of olive, corn and soybean oils due to air, light,heat and deep-frying
Shahina Naz *, Rahmanullah Siddiqi, Hina Sheikh, Syed Asad Sayeed
Department of Food Science and Technology, University of Karachi, Karachi 75270, Pakistan

Abstract
To follow the relative rate of oxidative deterioration of edible oils, refined olive, corn and soybean oils were analyzed periodically
for their peroxide value (PV), p-anisidine value (p-AV) and iodine value (IV) following exposure to air and air–light for 30 days.
Changes in the above values of the oils were also examined and after being used for deep frying of French fries at 180 °C for varying
periods of time i.e. 30, 60 and 90 min PV and p-AV values increased in the order, deep frying > air–light exposure > air exposure,
while the values with respect to the oils increased as soybean > corn > olive. Decreases in IV followed the same pattern, i.e. deep
frying > air–light > air and soybean > corn > olive. %Free fatty acid increased with increase in time of deep-frying. Deep-frying
of French fries in corn oil was also carried out in presence of caffeic, ferulic, vanillic acid and crude tea extract as antioxidants.
All antioxidants effectively reduced the oxidation rate in the oil as detected by decreases in PVs and p-AVs and relatively low reduc-
tion rates in IVs for all the frying times. The order of antioxidative activity was caffeic acid > vanillic acid > ferulic acid > tea
extract. Variation in %FFA of corn oil due to variation in nature of fried food was also analyzed. %FFA of the oil used for deep
frying of chicken drum sticks were higher than the values of the oil used for deep-frying of French fries.
Ó 2004 Elsevier Ltd. All rights reserved.



najnoviji rad iz 2010.
Olive oil stability under deep-frying conditions
Susana Casal a, Ricardo Malheiro b, Artur Sendas a,b, Beatriz P.P. Oliveira a, José Alberto Pereira b,*
a
REQUIMTE/Serviço de Bromatologia, Faculdade de Farmácia da Universidade do Porto, Rua Aníbal Cunha 164, 4050-047 Porto, Portugal
b
CIMO/School of Agriculture, Polytechnic Institute of Bragança Apartado 1172, 5301-854 Bragança, Portugal


a b s t r a c t
The suitability of different commercial olive oil categories for domestic frying was investigated. Oil samples were taken every 3 h of frying and evaluated for free acidity, peroxide and p-anisidine values, specific extinction coefficients, oxidative stability, fatty acids, vitamin E, b-carotene and total phenols, until the total polar compounds achieved the maximum legal value (25%). All olive oils were fried during more time than the commercial vegetable oil blend taken for comparison (from 24 to 27 h, against 15 h.The extra-virgin Protected Designation of Origin (PDO) olive oil was characterized by reduced levels oxidation and hydrolysis, and superior amounts of minor antioxidant compounds. The ‘‘olive oil” commercial category behaves similarly, but ‘‘Cobrançosa” olive oils performance was slightly worse, and clearly different between years, highlighting the importance of blending different cultivars. The vegetable oil, despite containing significantly higher amounts of vitamin E, was highly susceptible to oxidation under frying conditions when compared to all olive oils.

The results also show that the chemical composition of olive oils, particularly the amount of natural antioxidants, are important parameters in their predictive behavior along the frying process, but mostly that olive oil is clearly resistant to frying conditions, independently to the commercial category chosen.

Retention and distribution of natural antioxidants (a-tocopherol, polyphenols and terpenic acids) after shallow frying of vegetables in virgin olive oil
Nick KalogeropoulosÃ, Anastasia Mylona, Antonia Chiou, Maria S. Ioannou, Nikolaos K. Andrikopoulos
a
Laboratory of Food Chemistry-Biochemistry-Physical Chemistry, Department of Science of Dietetics-Nutrition, Harokopio University,
70 El. Venizelou Av., 176 71 Kallithea, Athens, Greece (2006.)

Abstract
Potatoes, green peppers, zucchinis and eggplants were shallow fried in virgin olive oil (VOO) according to the Mediterranean
traditional culinary practice. Zucchinis and eggplants were also blanketed with wheat flour or batter prior to frying. Polyphenols and hydroxy pentacyclic triterpene acids (HPTAs) were determined by GC/MS, while a-tocopherol was determined by high-performance liquid chromatography. Among 12 polyphenols determined, tyrosol predominated in frying oils and zucchini samples, while chlorogenic acid was the major phenolic species in the other vegetable samples. The triterpene acids maslinic, oleanolic and ursolic were determined in frying oils and fried vegetables, while a-tocopherol was present in all samples. Besides water loss and oil absorption, shallow frying resulted in partial loss of all the antioxidants studied in frying oils and enrichment of fried vegetables with olive oil antioxidants, which was in some extent affected by the type of vegetable fried and the culinary practice followed. The overall retention of the antioxidants in oil and food ranged from 32% to 64% for a-tocopherol, 25% to 70% for polyphenols and 35% to 83% for HPTA. It appears that vegetables fried in VOO provide an additional intake of a-tocopherol, terpenic acids and polyphenols as tyrosol and chlorogenic acid.
r 2006 Swiss Society of Food Science and Technology. Published by Elsevier Ltd. All rights reserved.
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Re: maslinovo ulje i przenje, dinstanje...

PostPostao/la Beppa Joseph » 06 ruj 2010, 21:37

Thalia je već spomenula ovu knjigu: Dr. A. Kiritsakis, OLIVE OIL FROM THE TREE TO THE TABLE -Second edition 1998

Upravo je čitamo i on kaže da je maslinovo ulje u prednosti pred drugim uljima za prženje zbog nekakvog akroleina...
(mm mi i dalje priča, ali ja više nemam snage pratiti stvari o kojima nemam pojma).
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Re: maslinovo ulje i przenje, dinstanje...

PostPostao/la eli » 06 ruj 2010, 21:49

naši stari su sve radili ili na masti ili na maslinovom. tako su se i fritule i kroštule (kolači) frigali na maslinovom ulju.
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Re: maslinovo ulje i przenje, dinstanje...

PostPostao/la Ina66 » 21 ruj 2010, 17:20

Sanika je napisao/la:dimi se kao dinstanja, ma na koliko slaboj vatri radila, i ma koliko polako :conf
nije to onaj smrdljivi dim, ali se dimi, blagi dim se vidi..smoke point dosegnut...
nemrem bas vjerovati da vam se ali ama bas ni malo ne zadimi, onda to nije dinstanje vec umakanje u mlakom ulju :dunno

ovo što opisuješ nije dimljenje ulja.
ulje dimi kad se pregrije prije dodavanja namirnica
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Re: maslinovo ulje i przenje, dinstanje...

PostPostao/la † Sanika » 21 ruj 2010, 18:30

Ina66 je napisao/la: ovo što opisuješ nije dimljenje ulja.


je je skužila, to se luk isparava..ma ja i kuhanje :rolf

stalno zaboravim napisati, hvala Beppa na trudu :kiss
Pauleta, 6.2.2003
Maksimović, 4.2.2009.
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† Sanika
Asimilirana
Asimilirana
 
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Re: maslinovo ulje i przenje, dinstanje...

PostPostao/la pinky » 21 ruj 2010, 20:41

maslinovo ulje dodajem na kraju...
dvije ICSI divote...
slika
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pinky
rodila 6.5kg i metar djece
 
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