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1.
Volatile compounds of Baltic herring analysed by dynamic headspace sampling–gas chromatography–mass spectrometry 总被引:1,自引:1,他引:1
Aro Tarja Tahvonen Raija Koskinen Lotta Kallio Heikki 《European Food Research and Technology》2003,216(6):483-488
European Food Research and Technology - The effect of storage time at 6&;nbsp;°C on the volatile compounds of Baltic herring was studied using the dynamic headspace–gas... 相似文献
2.
Heikki Kallio Saska Tuomasjukka Anu Johansson Raija Tahvonen Niina Nieminen Olli Sjvall Juha‐Pekka Kurvinen Hanna Kivini 《European Journal of Lipid Science and Technology》2005,107(2):101-106
Currant oils have special health properties due to their moderate contents of α‐linolenic, γ‐linolenic and stearidonic acids. The distribution of fatty acids (FA) in the triacylglycerols (TAG) may affect the beneficial effects. Seed oils of wild northern red currant (NRC) (Ribes spicatum L.) from Northern Finland and of wild alpine currant (AC) (R. alpinum L.) from the South‐West coast of Finland were investigated. The purified TAG were analysed by tandem mass spectrometry by applying the ammonia negative ion chemical ionisation – collision‐induced dissociation method. Molecular weight fractions rich in C18:3 FA and C18:4 FA were investigated. Of the total oil, the molecular weight species 54:7 (ACN:DB), 54:8 and 54:9 were more abundant in NRC than in AC, being 21.0%, 15.8%, 7.4% and 16.2%, 11.2%, 4.8%, respectively (p <0.05). The species 52:6 was more abundant in AC (3.1%) than in NRC (2.6%) (p <0.05). The preferential order of FA to be in the sn‐2 position in both berries was typically C18:1 > C18:2 > C18:4 > C18:3. No difference was observed between relative locations of C16:0 FA and C18:3 FA in either of the oils. Within the TAG consisting of FA combinations C18:3/C18:3/C18:1 (54:7), C18:1 was more preferentially in the sn‐2 position (p <0.05) in AC (93.2%) than in NRC (74.6%), and in the case of C18:3, the preference was vice versa. Within the molecular weight species 54:9, FA combination C18:4/C18:3/C18:2, linoleic acid preferentially occupied the secondary position (p <0.005) in both berries, and the proportion of the TAG regioisomer pair sn‐C18:3‐C18:4‐C18:2 + sn‐C18:2‐C18:4‐C18:3 was more abundant (30.2%) in NRC than in AC (15.3%). Within the TAG species 52:6, proportions of all the existing combinations, C16:0/C18:3/C18:3, C16:0/C18:4/C18:2 and C16:1/C18:3/C18:2, varied between the two berry species (p <0.005). 相似文献
3.
Järvenpää S Tahvonen RL Ouwehand AC Sandell M Järvenpää E Salminen S 《Journal of dairy science》2007,90(7):3171-3177
Our aim was to develop a prototype of a functional spread cheese containing both a specific probiotic and n-3 fatty acids and to analyze the viability of the probiotic and stability of n-3 fatty acids during 4 wk of shelf life. Lactobacillus fermentum ME-3 (Lf ME-3) isolated from a healthy Estonian child has been shown to have probiotic and antioxidative properties in several recent studies. In the current study this promising bacterial strain was combined with vegetable oils rich in nutritionally important α-linolenic acid and with unflavored cheese to obtain soft cheese spreads with different fat contents. Lactobacillus fermentum ME-3 survived well in all cheeses although the viable count did not increase during 4 wk of storage. The fatty acid composition of cheese triacylglycerols remained stable, whereas the profile of volatile compounds changed: hexanal and pentanal disappeared and the proportion of some alcohols increased. The changes in the profile of volatile compounds show the reductive power of Lf ME-3. A functional spread cheese containing n-3 fatty acids can be prepared with the probiotic Lactobacillus fermentum ME-3 strain leading to a reduced need for chemical anti-oxidants. 相似文献
4.
Alterations in chylomicron and VLDL TAG and the magnitude of postprandial lipemia were studied in healthy volunteers after
two meals of equal FA composition but different TAG-FA positional distribution. Molecular level information of individual
lipoprotein TAG regioisomers was obtained with a tandem MS method. The incremental area under the response curve of VLDL TAG
was large (P=0.021) after modified lard than after lard. In plasma TAG, the difference did not quite reach statistical significance (P=0.086). In general, there were less TAG with palmitic acid in the sn-2 position and more TAG with oleic acid in the sn-2 position in chylomicrons than in fat ingested. From 1.5 to 8 h postprandially, the proportion of individual chylomicron
TAG was constant or influenced by TAG M.W. VLDL TAG regioisomerism was similar regardless of the positional distribution of
fat ingested. Significant alterations were seen in VLDL TAG FA, in M.W. fractions, and in individual regioisomers with respect
to time. The TAG sn-14∶0-18∶1-18∶1+sn-18∶1-18∶1-14∶0, sn-16∶0-16∶1-18∶1+sn-18∶1-16∶1-16∶0, and sn-16∶1-18∶1-18∶1+sn-18∶1-18∶1-16∶1 decreased (P<0.05); and sn-16∶0-16∶0-18∶2+sn-18∶2-16∶0-16∶0, sn-16∶0-16∶0-18∶1+sn-18∶1-16∶0-16∶0, sn-16∶0-18∶1-16∶0, and sn-16∶0-18∶1-18∶2+sn-18∶2-18∶1-16∶0 increased (P<0.05) after both meals. In conclusion, positional distribution of TAG FA was found to affect postprandial lipid metabolism
in healthy normolipidemic subjects. 相似文献
5.
H. Kallio T. Lehtinen P. Laakso R. Tahvonen 《European Food Research and Technology》1998,207(4):276-280
The fatty acid composition of "fish wurst", a fermented salami-type sausage made of pork, lard and Baltic herring fillets
(Clupea harengus var. membras) was investigated. Changes in the proportions of the 35 most abundant fatty acids were examined throughout the 1-month ripening
period followed by a 4-month storage period. The fat composition of the product was stable (32–35%) and retained the characteristics
of the main ingredients: oleic acid (37.4%, mean of three production batches) palmitic acid (23.7%) and linoleic acid (10.7%)
from lard and fish, stearic acid (11.7%) mainly from lard, and palmitoleic acid (3.0%) and long-chain (C20–C24), polyunsaturated
fatty acids (c.a. 6%) mainly from fish. During the 4-week ripening period a statistically significant increase (P≤0.05) was detected in the proportions of minor fatty acids only, i.e. eicosenoic acid (20 : 1n-9), eicosadienoic acid (20 : 2n-6),
docosadienoic acid (22 : 2n-6) and docosatrienoic acid (22 : 3n-3). During the 4-month storage of the ripe sausage, the fatty
acid composition stabilized. Only the proportion of stearic acid increased significantly during storage, from 11.7% to 12.5%.
Received: 23 January 1998 / Revised version: 1 April 1998 相似文献
6.
Terhi A. Pohjanheimo Mari A. Hakala Raija L. Tahvonen Seppo J. Salminen Heikki P. Kallio 《Journal of food science》2006,71(4):S343-S348
ABSTRACT: This paper describes the effect of flaxseed on two bread formulations. The quality of bread rolls—containing flaxseed—and the quality of cinnamon rolls—containing flaxseed and flaxseed oil—is determined by sensory evaluation (texture, odor, and flavor), instrumental texture measurement and chemical analysis (fatty acids, fiber, secoisolarisiresinol diglycoside, and cadmium). Bread aging is monitored by measuring sensory attributes during storage. The results indicate that the flaxseed rolls retain moisture and softness more efficiently than the control rolls that do not contain flaxseed. No off-odors were detected during the storage period from 0 to 6 d at room temperature (+22 °C), although flaxseed rolls and cinnamon rolls were discovered to be high in unsaturated fats. The major fatty acid in both bakery samples that contained flaxseed was α-linolenic acid. The flaxseed rolls were also high in fiber. Therefore, from a nutritional viewpoint flaxseed shows beneficial properties in breadmaking. It has a positive impact on the texture parameters during storage as well as on the nutritional composition, for example, the content of fiber and unsaturated fats. 相似文献
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Terhi Pohjanheimo Harri Luomala Raija Tahvonen 《Journal of the science of food and agriculture》2010,90(9):1538-1544
BACKGROUND: Wholegrain food may have an important role in the prevention of chronic diseases, and therefore its consumption should be increased. However, wholegrain products have a low consumption because of unfamiliar taste and poor understanding about the health benefits. Generally, adolescents unfamiliar with wholegrain bread dislike it. Food use in childhood correlates positively with practices in adult life, and therefore adolescents are an important target group for research. The aim was to study adolescents' attitudes towards wholegrain bread in a society where wholegrain products are widely used. RESULTS: A qualitative focus group method (n = 61) and a quantitative procedure (n = 104) with 13–15‐year‐old secondary school students indicated that Finnish adolescents considered wholegrain breads healthier and more acceptable than refined breads. The motives for wholegrain bread consumption were taste, feeling of fillingness and weight control. Girls were more interested in bread healthfulness than boys (P < 0.01), and participants who showed a more positive attitude towards general health interest reported using more rye and wholegrain breads than participants with negative attitudes. CONCLUSION: Adolescents familiar with the sensory properties and healthfulness of rye and wholegrain breads consumed them regularly and perceived them as pleasant and very acceptable. Copyright © 2010 Society of Chemical Industry 相似文献
10.
Raija Tahvonen A. Hietanen Terhi Sankelo Veli-Markku Korteniemi P?ivi Laakso H. Kallio 《Zeitschrift für Lebensmitteluntersuchung und -Forschung A》1998,206(5):360-363
Press residue from black currant juice production was used for the development of a nutritious breakfast cereal manufactured
using an extrusion process at high temperatures. The milled residual fraction with crushed seeds contained significant amounts
of essential fatty acids, minerals and dietary fibre. The maximal useful amount of this ingredient, about 30%, was reached
in a mix containing 30% oat flour and oat bran, 30% potato starch, 7.5% sugar, 1.5% malt extract and 1% salt. In a model product
the total fat content was 3%, with the proportions of major fatty acids as follows: linoleic acid 43 mol-%, oleic acid 20
mol-%, α-linolenic acid 12 mol-%, γ-linolenic acid 9 mol-% and stearidonic acid 2 mol-%. During the extrusion process the
unsaturated fatty acids were not lost in quantifiable amounts. The product also contained approximately 20% total dietary
fibre and plenty of Ca (1.9 g/kg), Mg (1 g/kg) and Fe (59 mg/kg).
Received: 13 November 1997 相似文献