Carrots preparation

Tables H2.3.2 and H2.3.3 show TPA parameters of raw and cooked potatoes and carrots prepared at some of the temperatures de-...

Preparation of Apple CWM and AIR and Extraction of Pectin Fractions. Apples ( Granny Smith variety) were cored and peeled and the resulting pulp (2 kg batches) was stored in ethanol suspension to minimize enzymic oxidation. Separate batches of pulp were processed, as described for carrot preparations, to furnish apple CWM (32.5 g) and apple AIR (39.8 g) for which analytical data are recorded in Table VI. Polysaccharide fractions B (4 g) and C (2.5 g) were extracted from CWM with water at 80° and aqueous 1% ammonium oxalate at 80°. Likewise polysaccharide fractions A (2.1 g), B (5.2 g), and C (4.5 g) were Isolated from AIR by extraction with water at room temperature, 80°, and with aqueous 1% ammonium oxalate... 

Della Monica, E.S. and P.E. McDowell. Comparison of beta-carotene content of dried carrots prepared by three dehydration processes. Food Technol. 19 141-143,1965. 

Preparation of the intermediates for the above chemicai synthesis are also described in U.S. Patent 2,917,539, The other patents cited below describe a fermentation route, U.S. Patent 2,848,508 describes preparation from carrots. 

Distributions prepared from single lot of diced dehydrated carrots by grinding through food chopper and separating ground material into fractions by sieves. 

Traditionally, carotenoid standards are prepared in each laboratory using the best sources of each individual carotenoid, for example, violaxanthin from spinach, antheraxanthin from potatoes, capsanthin and capsorubin from paprika, a- and P-carotene from carrots, and lycopene from tomatoes. 

Carrots (Boleo) were peeled by 2% NaOH at 88-96°C for 4 minutes, minced by a meat mincer (2 mm) and homogenised for 2 minutes by an ULTRA-TURRAX T25 homogenizer (from Jahne Kunkel). The carrot mash was preheated to 45°C (20 minutes) before the enzyme preparations, 25 mg enzyme protein/kg mash, were added. The enzymes were dissolved in water to give a dilution of 5% (v/v) of the carrot mash. The mash was incubated at 45°C under stirring (60 rpm) for 2 hours, before the enzymes were inactivated at 86°C for 5 minutes in a microwave oven. Finally the purees were homogenised for 1 minute by ULTRA TURRAX. The viscosity of the puree was measured by a BROOKFIELD viscosimeter Model DV-n + with spindle A from HELIPATH SPINDLE SET at 2.5 rpm thermosta-ted at 50°C. The stability of the puree was measured as the sediment (in %) after centrifugation in 10 ml tube a 1660 x g for 10 minutes. 

Preparation of the alcohol insoluble solids (AIS) The content of the can was drained and the carrot cubes were immediately frozen in hquid nitrogen, freeze-dried and milled. Carrot powder (ca. 10 g) was mixed with 200 ml 80% ethanol previously heated to 60°C. After filtration the residue was extracted with ethanol until the filtrate was colorless (5 times) and gave negative reaction with phenol-sulfuric acid test (Dubois et al., 1956). 

Marx, M., M. Stuparic, A. Schieber et al. 2003. Effects of thermal processing on tran.v-f/.v-isomcrization of (3-carotene in carrot juices and carotene-containing preparations. Food Chem. 83 609-617. 

A C30 RP column has been applied for the separation of carotenoids present in various matrices such as human serum, raw and thermally processed carrots, a Duniella algae-derived preparation and a poultry feed. Samples were mixed with deionized water and CaC03, homogenized and extracted with acetone-hexane (1 1, v/v). 

PDCB was prepared by suspending cut-up unpeeled potatoes (100 g L ) and carrots (10 g L ) in purified water and heated to boiling in a microwave oven for 5-10 min. Dextrose (d-(- -)-glucose) was added (30 g L ). The medium was sterilized by autoclaving for 20 min at 121 °C and then decanting off the broth. The broth is clear to slightly opalescent and yellowish in colour. No pH adjustment was made. 

Details of preparation and storage conditions for crops that last well through the winter are given here (seepanel, left). Some other crops can also be stored for shorter periods for example, carrots, parsnips, beets, rutabagas, and celeriac keep well if packed in moist sand or fine leaf mold in shallow trays or boxes. 

Identical samples for UV radiation studies were prepared by halving longitudinally each of two carrots and pairing the different halves to give two samples, or by quartering longitudinally each of... 

Further support for the hypothesis that Ca2+ plays a central role in regulating phytoalexin accumulation is provided by experiments in which the turnover of phosphatidylinositol was measured in the plasma membrane of elicitor-treated carrot cells [17]. The carrot cells were first labelled with [3H]myo-inositol and, after the addition of elicitors, acid extracts of the cells were analyzed chromatographically for the production of inositol trisphosphate (IP3). In cells treated with elicitor, the release of radioactive IP3 increased with time and attained a maximum at 3 - 5 min after treatment. Phospholipase activity responsible for the degradation of phosphorylated phosphatidylinositol increased correspondingly. Several reports have shown that IP3 induces rapid release of Ca2+ from intracellular stores in animal cells [18, 19]. Studies on plant cells have also demonstrated that exogenous IP3 releases Ca2+ from microsomal preparations at micromolar concentrations, although only limited... 

Based on 13C-NMR analyses, it has been assumed [62] that 6-methoxymellein, a polyketide compound, is synthesized by head-to-tail condensation of one acetyl-CoA and four malonyl-CoA to form 3,4-dehydro-6-hydroxymellein as an intermediate. This isocoumarin derivative is then reduced to its dihydro-form, 6-hydroxymellein, which then accepts a methyl-unit via Omethyltransferase. We have shown [63] that cell extracts prepared from elicitor-treated carrot root disks catalyzes... 

Intermediary metabolism of irradiated tissues was examined to attempt to explain the increased respiration on the basis of biochemical mechanics. In these experiments carrot disks 0.5 mm. thick were prepared as before and subjected to substrate utilization studies (9). This involved incubating the slices with the appropriately labeled substrate in 0.03M phospate buffer at 25°C. The incubation involves shaking with gentle aeration and trapping the respired CO2 in alkali. Following incubation the slices were removed, washed, ground with 80% ethanol, and filtered, and both the filtrate and residue were assayed for radioactivity. Thus, a measure of substrate absorption and utilization was determined. 

Carrots, tomatoes, and dark green vegetables are rich in specific carotenoids. Numerous epidemiological studies have shown that the increased intake of fruits and vegetables is associated with a reduced risk of lung and other epithelial cancers. Accurate food composition data have been prepared to test the association between dietary intake of specific carotenoids and disease incidence (Table 63.1). 

The dietary exposure to PAHs via vegetables in an industrialised area of Greece was low, at between 1.6 and 4.5 /ig/person/day.29 The vegetables in this study were prepared as for consumption, i.e. after washing with tap water and peeling of carrot roots. This reflects the ease by which PAHs can generally be removed from fmit and vegetables after deposition. 

Wild Carrot naturally, therefore, takes a prominent place in many formulae for the treatment of dropsy, gravel, retention of urine, and bladder trouble generally. Either an infusion or decoction may be prepared in the usual proportions, and doses of 2 fl. ounces taken three or four times daily. 

Raoul prepares a dressing (olive oil, red raspberry vinegar, salt, and pepper) and rips up the salad greens. He grates the carrots and breaks up the goat cheese on top. 

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