WO2010072481A1 - Coating composition for frozen confections - Google Patents
Coating composition for frozen confections Download PDFInfo
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- WO2010072481A1 WO2010072481A1 PCT/EP2009/065448 EP2009065448W WO2010072481A1 WO 2010072481 A1 WO2010072481 A1 WO 2010072481A1 EP 2009065448 W EP2009065448 W EP 2009065448W WO 2010072481 A1 WO2010072481 A1 WO 2010072481A1
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- WIPO (PCT)
- Prior art keywords
- oil
- coating
- composition
- fat
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Classifications
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23D—EDIBLE OILS OR FATS, e.g. MARGARINES, SHORTENINGS, COOKING OILS
- A23D9/00—Other edible oils or fats, e.g. shortenings, cooking oils
- A23D9/007—Other edible oils or fats, e.g. shortenings, cooking oils characterised by ingredients other than fatty acid triglycerides
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23G—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF
- A23G3/00—Sweetmeats; Confectionery; Marzipan; Coated or filled products
- A23G3/34—Sweetmeats, confectionery or marzipan; Processes for the preparation thereof
- A23G3/343—Products for covering, coating, finishing, decorating
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23G—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF
- A23G9/00—Frozen sweets, e.g. ice confectionery, ice-cream; Mixtures therefor
- A23G9/32—Frozen sweets, e.g. ice confectionery, ice-cream; Mixtures therefor characterised by the composition containing organic or inorganic compounds
- A23G9/322—Products for covering, coating, finishing, decorating
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23G—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF
- A23G9/00—Frozen sweets, e.g. ice confectionery, ice-cream; Mixtures therefor
- A23G9/44—Frozen sweets, e.g. ice confectionery, ice-cream; Mixtures therefor characterised by shape, structure or physical form
- A23G9/48—Composite products, e.g. layered, laminated, coated, filled
Definitions
- the present invention relates to coating compositions for frozen confections.
- it relates to coatings which contain reduced amounts of saturated fat.
- Chocolate-coated ice creams or other frozen confections are popular products.
- the composition of chocolate is defined in most countries so that the major fat component is cocoa butter.
- Chocolate-like coatings based on other fats are also commonly used.
- the physical properties of the coating are determined by the crystallization of the fat.
- An important parameter associated with fat crystallization is the setting time, i.e. the time at which the coating first develops an audible crack on biting.
- coconut oil The most commonly used non-cocoa butter fat is coconut oil. This is because it crystallizes rapidly when it comes into contact with ice cream. It also produces coatings with the required physical properties, in particular it provides "snap" on biting, has a short setting time and makes the coating firm so that it resists deformation and / or surface marking after production, for example during packaging or storage.
- coconut oil has the disadvantage that approximately 90% of its fatty acids are saturated.
- the fat content of a coating composition is up to about 60 wt%, so that the coating has a saturated fat (SAFA) content of about 55 wt%.
- SAFA saturated fat
- the mass of the coating per product also depends on the physical properties of the fat, in particular the viscosity of the coating composition. It is important to control the amount of coating because it is a costly part of the final product; it is also necessary to provide the thickness of coating preferred by consumers. Moreover, the coating must not be too thin in order to prevent "pinholing" i.e. the formation of small holes in the coating.
- US 5 939 114 discloses ice cream coating compositions with reduced SAFA contents based on mixtures of palm oil fractions such as palm mid fraction.
- WO 03 / 75672 discloses coating compositions comprising a soft palm mid fraction.
- US 2008 / 131564 discloses coating compositions comprising from 40 to 60 wt% of a fat component which has a SAFA content of no more than 33%.
- the fat component is a mixture of fractionated palm oil (e.g. palm mid fraction) and a liquid oil such as canola oil, sunflower oil, soybean oil or corn oil. While the coating has a reduced SAFA content, we have found that this can create another problem, namely an increase in the amount of coating per product.
- the amount of SAFA expressed as a percentage of the fat in the coating composition is reduced, a corresponding reduction in the absolute amount of SAFA per product is not obtained due to the overall increase in the total amount of coating, and hence total amount of fat. Therefore there still remains a need for improved fat-based coating compositions for frozen confections.
- the present invention provides a composition for coating a frozen confection, the composition comprising from 63 to 70 wt% of a fat component comprising:
- the composition comprises from 64 to 68 wt% of the fat component.
- the palm oil fraction constitutes at least 85 wt% of the fat component.
- the palm oil fraction is a palm mid-fraction.
- liquid oil is sunflower oil, olive oil, soybean oil, rapeseed oil, corn oil, cottonseed oil, groundnut oil or a mixture thereof.
- the liquid oil constitutes from 7 to 12 wt% of the fat component.
- cocoa butter is present in an amount of less than 5 wt% of the fat component.
- the present invention provides a process for producing a coated frozen confection, the process comprising providing a coating composition according to the first aspect of the invention, and then coating a frozen confection with the composition.
- the present invention provides a frozen confection coated with a composition according to the first aspect of the invention.
- the thickness of the coating layer is from 0.5 to 5mm.
- the frozen confection is ice cream.
- Frozen confection means a confection made by freezing a pasteurised mix of ingredients such as water, fat, sweetener, protein (normally milk proteins), and optionally other ingredients such as emulsifiers, stabilisers, colours and flavours. Frozen confections may be aerated. Frozen confections include ice cream, water ice, frozen yoghurt and the like.
- Coating composition means a fat-based edible material which can be used to form a coating layer on a frozen confection.
- Such compositions include chocolate analogues (sometimes called couvertures) which are made using fats other than cocoa butter.
- the coating compositions may contain cocoa solids (e.g. in an amount of from 5 to 20% by weight of the coating composition, preferably 8 to 15%), non-fat m i l k solids (e.g. in an amount of up to 30% by weight of the coating composition, preferably 5% to 20%), sugar or other sweeteners (e.g. in an amount of from 10 to 35% by weight of the coating composition, preferably 1 5 to 30%), emulsifiers (e.g.
- the emulsifier may be any emulsifier suitable for use in chocolate,traction or other fat-based coatings, for example ammonium phosphatide, sunflower lecithin, soya lecithin or polyglycerol polyricinoleate (PGPR) which is obtainable from Quest International under the trade name Admul WoI.
- Cocoa solids are usually provided in the form of cocoa powder, which consists of about 90% cocoa solids and about 10% cocoa butter, or cocoa liquor, which consists of about 50% cocoa solids and 50% cocoa butter.
- Fats are generally triglycerides, i.e. triesters of glycerol and fatty acids.
- the term "fat” as used herein includes both liquid oils and solid fats.
- Triglycerides are classified according to the number of saturated (denoted S) and unsaturated (denoted U) fatty acid residues they contain, i.e. S 3 (triglycerides with three saturated fatty acids), S 2 U (two saturated and one unsaturated); SU 2 (one saturated and two unsaturated); and U 3 (three unsaturated). This notation does not distinguish between the alternative possible positions for the fatty acids in the triglyceride.
- Natural sources of fats for example coconut oil, palm oil, cocoa butter and sunflower oil are mixtures of triglycerides.
- the relative amounts of S 3 , S 2 U, SU 2 and U 3 triglycerides depend on the type of fat.
- the amount of saturated fat in a fat or a blend of fats is the percentage (by weight of the fat) of saturated fatty acids.
- the triglyceride composition (in terms of S 3 , S 2 U, SU 2 and U 3 ) can be determined using an Agilent 6890+ gas chromatography system with automated on column injection onto a capillary column with flame ionization detection and oven track injection mode.
- a Quadrex 15m, 0.25mm internal diameter, 0.1 ⁇ m film 65% phenyl-methyl silicone gas chromatography column is used.
- Fats are dissolved in iso-octane at a concentration of around 0.3mg/mL (0.25-0.50 mg/mL) and a volume of 0.1 ⁇ L is injected using the Agilent nano adaptor set to ON with 1 ⁇ L volume setting.
- the carrier gas is helium, at a constant flow of 1 ml/minute (initial linear velocity ⁇ 30cm/s).
- the oven program is as follows: hold at 80 0 C for 0.5 minutes, ramp to 330 0 C at 50°C/minute, triglyceride separation from 330 0 C to 350 0 C ramping at 1°C/minute.
- Calibration is by reference to standard triglyceride carbon number data, which is acquired using a Quadrex 10m 0.53mm internal diameter 0.1 ⁇ m film methyl-5%phenyl capillary gas chromatography column. The column is fitted into a Perkin Elmer AutoXL system with a programmable temperature vaporising injector configured in direct on-column mode.
- the oven program is: ramp from 200°C to 325°C at 10°C/minute, and then from 325°C to 355°C at 5°C/minute.
- the carrier gas is helium at typically 4OkPa.
- the fats used in the coating compositions of the present invention comprise a palm oil fraction, a liquid oi l and may also com prise cocoa butter.
- the fat component constitutes at least 63% by weight of the composition, preferably at least 64%; and at most 70%, preferably at most 68%.
- the compositions have a saturated fatty acid content of from 30 to 40% by weight of the composition, preferably from 34-36%.
- Unfractionated palm oil consists of about 9% S 3 , 48% S 2 U, 36% SU 2 and 6% U 3 .
- Palm oil is generally fractionated into three fractions: palm stearin fraction, which is enriched in S 3 triglycerides; palm mid-fraction which is enriched in S 2 U and palm olein fraction, which contains much of the SU 2 and U 3 triglycerides. Palm oil fractions and blends of fractions which are suitable for use in the present invention contain S 3 triglycerides in an amount of less than 8% (by weight of the palm oil fraction), preferably less than 7% more preferably less than 5%. They also have an S 2 U: SU 2 ratio of > 2.5, preferably > 3.0, more preferably > 3.5.
- Suitable fractions therefore include palm mid-fractions such as Creamelt 700 and Creamelt 900, produced by Loders Croklaan; other suppliers of palm mid fractions include Britannia Foods, Premium Vegetable Oils (Malaysia) and Lam Soon (Thailand). Blends of palm mid fractions and u p to a bout 45% pa l m olei n fraction (depend i ng on the precise trig lyceride composition of the fractions) meet the above criteria and therefore may also be used.
- the term "palm oil fraction” includes blends / mixtures of two or more palm oil fractions. Preferably the blend contains up to 40%, more preferably up to 20% (by weight of the blend) of palm olein fraction.
- the palm oil fraction is present in an amount of at least 70%, preferably at least 85% and most preferably at least 90% by weight of the fat component; and at most 95%, preferably at most 93%, most preferably less than 92%.
- liquid oil means an oil that has a solid fat content of less than 5% at 20 0 C, measured by pulse NMR spectroscopy as follows.
- the fat or fat blend is first heated to 80 0 C and then held at 60 0 C for 30 minutes, so that the fat is completely melted. It is then cooled to and held at 0 0 C for one hour. It is then wa rmed to 20 0 C (the measurement temperature) and held for 30 minutes.
- the amount of solid fat is then measured with a standard pulse N MR technique using a NMS 120 Minispec NM R spectrometer.
- Suitable liquids oils that may be used include sunflower oil (including high oleic sunflower oil), safflower oil (including high oleic safflower oil), olive oil, linseed oil, soybean oil, rapeseed oil, walnut oil, corn oil, grape seed oil, sesame oil, wheat germ oil, cottonseed oil, fish oil, almond oil, perilla oil, water melon seed oil, rice oil, groundnut oil, pistachio oil, hazelnut oil and mixtures or fractions thereof.
- the liquid oil is sunflower oil and / or rapeseed oil.
- the liquid oil is present in an amount of at least 5%, preferably at least 7% and most preferably at least 8% by weight of the fat component; and at most 15%, preferably at most 12%, most preferably less than 10%.
- Cocoa powder contains typically about 1 1 % fat (i.e. cocoa butter) and cocoa liquor contains typically about 50% fat. Thus when the coating compositions comprise cocoa powder or cocoa liquor, some cocoa butter is present.
- the cocoa butter comprises at most 15%, preferably less than 5%, more preferably less than 2% by weight of the fat component.
- Coating compositions are applied to the frozen confection as liquids, but solidify when they are cooled down, for example as a result of contact with the frozen confection.
- Fat-based coating compositions have complex solidification behaviour because they contain mixtures of different triglycerides which can crystallize in different forms.
- Coated stick products have been known for many years. They can be produced by an "extrude and cut” process, in which ice cream or other frozen confection from an ice cream freezer is extruded vertically downwards though a nozzle onto a conveyor. Sticks are inserted as the ice cream comes out of the nozzle and a heated wire cuts it horizontally into uniform portions of the required thickness.
- the conveyor carries the ice cream through a hardening tunnel where its temperature is reduced to about - 25°C.
- they may be produced by a moulding process, where ice cream is drawn from the freezer and filled into moulds which are subsequently immersed in a cold liquid, such as brine. Sticks are inserted before the ice cream is fully frozen. Products are then removed from the moulds and may be hardened.
- the ice cream stick is picked up by a stick gripper (e.g. sets of tongs mounted on a carriage frame).
- Liquid coating for example chocolate or a chocolate analogue is held in a dipping tank at around 30-50 0 C.
- the stick gripper transfers the ice cream to the dipping tank, where it is lowered into the liquid coating for a certain time, and then removed.
- the dipping time, the ice cream temperature, the viscosity of the liquid coating and the crystallization properties of the fat determine the thickness of the coating layer deposited on the ice cream pieces. If the dipping time is too short, the ice cream too warm, or the liquid coating viscosity too low, the coating may be incomplete. The reverse of these can result in a coating that is too thick.
- the coating layer is from 0.5 to 5mm thick, preferably from 0.75 to 3mm; coatings in this range of thickness are liked by consumers.
- the coating composition begins to solidify on the cold ice cream. Within a few seconds the liquid coating becomes dry to the touch and has plastic or leathery texture. This arises from partial crystallization of the fat. Crystallization continues slowly, and it may take several hours for the coating to reach its maximum brittleness.
- Coating compositions were made using the formulations given in Table 1.
- Examples A- E are comparative examples and examples 1 to 3 are according to the invention.
- the palm mid fraction used was Creamelt 700, obtained from Loders Croklaan.
- the cocoa powder and cocoa liquor contained 10-12% and 55% cocoa butter respectively.
- Table 1
- the coatings were prepared in 1.5kg batches as follows. First, the emulsifier was added to the oil at 45°C. The dry ingredients were blended together, and then half of the fat / emulsifier mixture was added to form a slurry. The slurry was put into a laboratory scale ball mill (supplied by Leatherhead Food RA) operating at approximately 60 rpm. The balls (equal volumes of balls of 9mm, 11 mm, 14mm, and 17mm diameter) were at a temperature of 50 0 C. The slurry was milled and the particle size was measured at regular intervals using a Draper external digital micrometer.
- the remainder of the oil / emulsifier was added in to the slurry, and the ball mill was run for a further 15 minutes. Finally, the coating composition was removed from the ball mill, placed in a suitable container, and stored in an oven at 50 0 C.
- the sample was held at 50 0 C for 30 minutes, then cooled in the instrument to the measuring temperature of 30 0 C and held for 10 minutes before measurement.
- a stepped flow measurement was used: the shear stress was ramped from 0.1 Pa to 15Pa in log mode with 20 points per decade, 20 seconds constant time.
- the measured stress / strain data was analysed using the inbuilt data analysis functions and applying the Casson function. This gives values for the yield stress and Casson viscosity, which enable viscosity values to be calculated at strain rates of interest.
- the brittleness of the coating compositions was measured using an lnstron universal testing machine (type 5500R). First, thin strips of the coating composition (2mm deep, 50mm long and 10 mm wide) were made using a silicone rubber mould. The mould was placed on a sheet of acetate and pressed firmly to form a seal. This was then placed on top of a stainless steel disc. 1cm 3 of the coating composition was dosed into the mould. Taking care not to incorporate any air bubbles, another sheet of acetate was placed on top of the silicon mould and then another metal disc was placed on top. The moulds were then held in a freezer -25°C overnight. The strips were de- moulded by removing the top disc and sheet of acetate, and then carefully peeling off the silicone rubber mould. The strips were left to equilibrate for 1 week at -25°C and then overnight at -18°C before testing. For each composition, 14 strips were produced to ensure that at least 10 samples could be tested.
- the resulting force-displacement curves were used to determine the yield strain and yield stress of each strip, and the mean values were calculated for each composition.
- Brittle coatings exhibit low yield strains, i.e. less than 6%, preferably less than 5%.
- Firm coatings have high values of the yield stress i.e. greater than 10M Pa, preferably greater than 1 5M Pa.
- Firm, brittle coatings have resistance to damage after coating and good snap on consumption.
- Ice cream was prepared using the formulation given in Table 2. The ingredients were blended with hot water, then homogenized, pasteurized and aged for at least 2 hours. The mix was then frozen and aerated to an overrun of 90% in a standard ice cream freezer (scrape surface heat exchanger).
- the partially frozen ice cream was drawn from the freezer at a temperature of about -3°C and then filled into moulds.
- the moulds were placed in a brine bath at a temperature of -39°C to further freeze the ice cream.
- a stick was placed into each ice cream before it had completely frozen.
- the moulds were then immersed in water at +34°C so that the ice creams could be removed.
- Finally the ice creams were wrapped, blast frozen at -40 0 C and stored at -28°C.
- the resulting ice cream products had dimensions of 97mm (length) x 13mm (average thickness), tapered in width from 49mm at the bottom to 42mm at the top, and weighed 36g ( ⁇ 2g).
- each ice cream portion was weighed (to the nearest tenth of a gram), and tempered at -18°C for at least 18 hours.
- the coating composition was removed from the oven and stirred thoroughly. It was then poured into a container and placed in a water bath for 30 minutes to equilibrate to 30 ⁇ 1°C. The composition was stirred thoroughly with a spatula before ice creams were dipped.
- the ice cream portion was held by its stick and dipped into the coating com position so that the ice cream was completely immersed, and im mediately removed. It was held above the container to allow the excess coating composition to drain off under gravity. No pinholing was observed for any of the samples.
- the coated ice cream was weighed again. The weight of the coating composition was calculated by subtracting the weight before dipping from the weight after dipping.
- Table 3 summarises the fat composition and physical properties of the coatings.
- Comparative example A is a conventional coating composition based on coconut oil. This has a high yield stress and a low yield strain, indicating a firm coating with good snap. However, the coating contains a high amount of SAFA, namely 5.6g (per product, not counting SAFA from the ice cream). Comparative example B demonstrates the effect of replacing the coconut oil with palm mid-fraction, which has a lower SAFA content. Again, the coating is firm and brittle. However, the viscosity of the composition is higher, so the pick-up weight is greater. Thus the SAFA content of the coating per product is reduced, but not by as much as would have been expected.
- Examples D and E reproduce coating compositions disclosed in US 2008 / 131564, i.e. based on mixtures of palm mid fraction and a liquid oil which have 60% total fat (including the cocoa butter present in the cocoa liquor). The liquid oil makes up 9.1% and 31.8% respectively of the total fat.
- the composition of Example D contains only 32.4% SAFA, the pick-up weight is high, and hence the amount of SAFA per product is similar to that of examples B and C.
- the composition of Example E contains a higher amount of liquid oil, and hence has a low amount of SAFA per product despite the high pick-up weight. However, it has a low yield stress and a high yield strain, and it is not sufficiently firm and brittle.
- the coating compositions contain increased amounts of fat (65 to 70%, compared to the conventional amount of about 60%).
- the SAFA content of the fat and the pick-up weight are simultaneously reduced, resulting in a lower amount of SAFA per coated product, i.e. approximately 4g, compared to 5.6g for example A (coconut oil), and 4.5g for examples B, C (palm mid fraction alone) and D (mixture of palm mid fraction and rapeseed oil at 60% total fat).
- Each of examples 1 - 3 has a low yield strain and a relatively high yield stress, indicating good brittleness and firmness (i.e. "snap").
- examples 1 to 3 demonstrate that, contrary to what might be expected, the SAFA content per product can be reduced by actually increasing the amount of fat in the coating composition, provided that the fats are selected as described above.
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Abstract
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Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES09753123.0T ES2496675T3 (en) | 2008-12-23 | 2009-11-19 | Coating composition for frozen confectionery products |
EA201170882A EA021099B1 (en) | 2008-12-23 | 2009-11-19 | Coating composition for a frozen confection, process for producing a coated frozen confection and frozen confection |
CA2747102A CA2747102C (en) | 2008-12-23 | 2009-11-19 | Coating composition for frozen confections |
US13/140,024 US20110262599A1 (en) | 2008-12-23 | 2009-11-19 | Coating composition for frozen confections |
AU2009331815A AU2009331815B2 (en) | 2008-12-23 | 2009-11-19 | Coating composition for frozen confections |
BRPI0916508-8A BRPI0916508B1 (en) | 2008-12-23 | 2009-11-19 | COMPOSITION FOR COATING A FROZEN ICE CREAM, PROCESS TO PRODUCE A FROZEN ICE CREAM AND FROZEN ICE CREAM |
EP09753123.0A EP2367441B1 (en) | 2008-12-23 | 2009-11-19 | Coating composition for frozen confections |
MX2011006644A MX2011006644A (en) | 2008-12-23 | 2009-11-19 | Coating composition for frozen confections. |
CN200980152154.XA CN102264239B (en) | 2008-12-23 | 2009-11-19 | Coating composition for frozen confections |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08172786 | 2008-12-23 | ||
EP08172786.9 | 2008-12-23 |
Publications (1)
Publication Number | Publication Date |
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WO2010072481A1 true WO2010072481A1 (en) | 2010-07-01 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2009/065448 WO2010072481A1 (en) | 2008-12-23 | 2009-11-19 | Coating composition for frozen confections |
Country Status (10)
Country | Link |
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US (1) | US20110262599A1 (en) |
EP (1) | EP2367441B1 (en) |
CN (1) | CN102264239B (en) |
AU (1) | AU2009331815B2 (en) |
BR (1) | BRPI0916508B1 (en) |
CA (1) | CA2747102C (en) |
EA (1) | EA021099B1 (en) |
ES (1) | ES2496675T3 (en) |
MX (1) | MX2011006644A (en) |
WO (1) | WO2010072481A1 (en) |
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Also Published As
Publication number | Publication date |
---|---|
AU2009331815B2 (en) | 2013-01-31 |
ES2496675T3 (en) | 2014-09-19 |
BRPI0916508B1 (en) | 2018-04-03 |
BRPI0916508A2 (en) | 2015-08-04 |
EP2367441B1 (en) | 2014-07-09 |
CN102264239A (en) | 2011-11-30 |
CA2747102A1 (en) | 2010-07-01 |
EP2367441A1 (en) | 2011-09-28 |
MX2011006644A (en) | 2011-07-12 |
CN102264239B (en) | 2014-04-09 |
EA201170882A1 (en) | 2011-12-30 |
EA021099B1 (en) | 2015-04-30 |
AU2009331815A1 (en) | 2010-07-01 |
US20110262599A1 (en) | 2011-10-27 |
CA2747102C (en) | 2016-09-27 |
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