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Pectin NH is a thickener primarily used for preparing glazes for fruits tarts and pastries. Pectin NH is thermally reversible - it can be set, re-melted, and set again.
One Pectin to Rule Them All. WTF - Ep. Returns: 30 days refund. You save. Please create a new Wishlist. Description Pectin consists of a complex set of polysaccharides that are present in most primary cell walls of plants.
NH Pectin? The jam-packed episode! Try not to get too jelly with this jam packe These bonds form as water is bound by sugar and forces pectin strands to stick together.
These form a 3-dimensional molecular net that creates the macromolecular gel. The gelling-mechanism is called a low-water-activity gel or sugar-acid-pectin gel.
Normally low-ester pectins form gels with a range of pH from 2. The non-esterified galacturonic acid units can be either free acids carboxyl groups or salts with sodium, potassium, or calcium.
The salts of partially esterified pectins are called pectinates, if the degree of esterification is below 5 percent the salts are called pectates, the insoluble acid form, pectic acid.
Some plants, such as sugar beet , potatoes and pears , contain pectins with acetylated galacturonic acid in addition to methyl esters.
Acetylation prevents gel-formation but increases the stabilising and emulsifying effects of pectin. Amidated pectin is a modified form of pectin.
Here, some of the galacturonic acid is converted with ammonia to carboxylic acid amide. These pectins are more tolerant of varying calcium concentrations that occur in use.
To prepare a pectin-gel, the ingredients are heated, dissolving the pectin. Upon cooling below gelling temperature, a gel starts to form.
If gel formation is too strong, syneresis or a granular texture are the result, while weak gelling leads to excessively soft gels.
Amidated pectins behave like low-ester pectins but need less calcium and are more tolerant of excess calcium. Also, gels from amidated pectin are thermo-reversible; they can be heated and after cooling solidify again, whereas conventional pectin-gels will afterwards remain liquid.
High-ester pectins set at higher temperatures than low-ester pectins. However, gelling reactions with calcium increase as the degree of esterification falls.
Similarly, lower pH-values or higher soluble solids normally sugars increase gelling speeds. Suitable pectins can therefore be selected for jams and jellies, or for higher-sugar confectionery jellies.
Pears, apples, guavas, quince , plums, gooseberries, and oranges and other citrus fruits contain large amounts of pectin, while soft fruits, like cherries, grapes, and strawberries, contain small amounts of pectin.
The main raw materials for pectin production are dried citrus peels or apple pomace , both by-products of juice production. Pomace from sugar beets is also used to a small extent.
From these materials, pectin is extracted by adding hot dilute acid at pH-values from 1. During several hours of extraction, the protopectin loses some of its branching and chain length and goes into solution.
After filtering, the extract is concentrated in a vacuum and the pectin is then precipitated by adding ethanol or isopropanol.
An old technique of precipitating pectin with aluminium salts is no longer used apart from alcohols and polyvalent cations, pectin also precipitates with proteins and detergents.
Alcohol-precipitated pectin is then separated, washed and dried. Treating the initial pectin with dilute acid leads to low-esterified pectins.
When this process includes ammonium hydroxide NH 3 aq , amidated pectins are obtained. After drying and milling, pectin is usually standardised [ clarification needed ] with sugar and sometimes calcium salts or organic acids to have optimum performance in a particular application.
The main use for pectin is as a gelling agent , thickening agent and stabilizer in food. The classical application is giving the jelly-like consistency to jams or marmalades , which would otherwise be sweet juices.
Pectin also reduces syneresis in jams and marmalades and increases the gel strength of low-calorie jams. For household use, pectin is an ingredient in gelling sugar also known as "jam sugar" where it is diluted to the right concentration with sugar and some citric acid to adjust pH.
In some countries, pectin is also available as a solution or an extract, or as a blended powder, for home jam making.
With low-ester pectins and amidated pectins, less sugar is needed, so that diet products can be made. Water extract of aiyu seeds is traditionally used in Taiwan to make aiyu jelly , where the extract gels without heating due to low-ester pectins from the seeds and the bivalent cations from the water.
Pectin is used in confectionery jellies to give a good gel structure, a clean bite and to confer a good flavour release. Pectin can also be used to stabilize acidic protein drinks, such as drinking yogurt, to improve the mouth-feel and the pulp stability in juice based drinks and as a fat substitute in baked goods.
In medicine, pectin increases viscosity and volume of stool so that it is used against constipation and diarrhea. Until , it was one of the main ingredients used in Kaopectate a medication to combat diarrhea, along with kaolinite.
It has been used in gentle heavy metal removal from biological systems. In cosmetic products, pectin acts as a stabilizer. Pectin is also used in wound healing preparations and specialty medical adhesives, such as colostomy devices.
Sriamornsak  revealed that pectin could be used in various oral drug delivery platforms, e. It was found that pectin from different sources provides different gelling abilities, due to variations in molecular size and chemical composition.
Like other natural polymers, a major problem with pectin is inconsistency in reproducibility between samples, which may result in poor reproducibility in drug delivery characteristics.
Ruminant nutritionists recommend that the digestibility and energy concentration in forages be improved by increasing pectin concentration in the forage.
In cigars, pectin is considered an excellent substitute for vegetable glue and many cigar smokers and collectors use pectin for repairing damaged tobacco leaves on their cigars.
Yablokov et al. During the Second World War, Allied pilots were provided with maps printed on silk, for navigation in escape and evasion efforts.
The printing process at first proved nearly impossible because the several layers of ink immediately ran, blurring outlines and rendering place names illegible until the inventor of the maps, Clayton Hutton , mixed a little pectin with the ink and at once the pectin coagulated the ink and prevented it from running, allowing small topographic features to be clearly visible.
In the United States , pectin is generally recognized as safe for human consumption. In Europe, pectins are differentiated into the E numbers E i for non-amidated pectins and E ii for amidated pectins.
There are specifications in all national and international legislation defining its quality and regulating its use.
Pectin was first isolated and described in by Henri Braconnot , though the action of pectin to make jams and marmalades was known long before.
To obtain well-set jams from fruits that had little or only poor quality pectin, pectin-rich fruits or their extracts were mixed into the recipe.
During the Industrial Revolution , the makers of fruit preserves turned to producers of apple juice to obtain dried apple pomace that was cooked to extract pectin.
Later, in the s and s, factories were built that commercially extracted pectin from dried apple pomace and later citrus peel in regions that produced apple juice in both the US and Europe.
Pectin was first sold as a liquid extract, but is now most often used as dried powder, which is easier than a liquid to store and handle.
From Wikipedia, the free encyclopedia. Structural heteropolysaccharide in the primary cell walls of land plants and some algae.