Moisture: 15% max
Impurities: 3% max
Packing: 30/ 50 kgs/ PP bag, or as customer requirements
Drying process: Cleaned by freshwater and dried by sunshine
Crop: Latest
Origin: Viet Nam
Moisture: 15% max
Impurities: 3% max
Packing: 30/ 50 kgs/ PP bag, or as customer requirements
Drying process: Cleaned by freshwater and dried by sunshine
Crop: Latest Origin: Viet Nam
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Ulva lactuca is commonly called sea lettuce. Its color can range from light yellowish green to darker green, but is most commonly a vivid green underwater. When exposed at low tide or when washed up on a beach, it is typically darker green. Out of the water the seaweed looks like a rather slimy lime-green mass but in the water the alga actually does look very much like young lettuce leaves. Ulva lactuca is vivid green and cellophane thin (only two cell layers thick), and forms light yellowish green to dark green translucent sheets. The soft frond grows as a single, irregular, but somewhat round shaped blade with slightly ruffled edges which are often torn. There can be numerous small holes or perforations scattered throughout. The frond is connected to rocks with a small, almost invisible discoid holdfast, and does not have a stipe. Ulva lactuca may grow to a diameter of 20 to 30 centimeters, although it is freqently much smaller, with larger sheets feeling slightly thicker than smaller specimens.
Ulva lactuca can be found in an array of habitats, but is seen more abundantly in sheltered bays or in protected and semi-protected areas with limited wave action. It is found in tide pools, rock pools, cobble, boulders, and bedrock in mid- to lower levels of the intertidal zone, and also grows in the sublittoral to a depth of over 20 meters. In very sheltered conditions, plants that have become detached from the substrate can continue to grow, forming extensive floating mats or rafts. Ulva lactuca tolerates brackish conditions and can be found on suitable substrata in estuaries. It is present year round, but most abundant in summer and fall.
Ulva lactuca grows well in areas polluted with sewage, as it is a nutrient scavenger, and is also an opportunistic species that can form massive blooms when conditions are right. Certain environmental conditions can lead to the algae spreading over large areas. Non-point source pollution including nutrient runoff from agricultural lands and over-fertilized urban and rural sites are thought to be a contributing factor in sea lettuce blooms. The result is that large quantities of Ulva lactuca are washed up on beaches, where their decay produces methane, hydrogen sulphide, and other gases. As the bloom spreads and begins to die, it can deplete an area (and all of the bottom dwelling plants and animals that live there) of oxygen, and cause massive die-offs of fish and invertebrates.
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Names
alface do mar, an glasán, aosa, 石蓴, chicory sea lettuce, green laver, insalata di mare, kwanpo, laitue de mer, lattuga marina, lechuga de mar, lechuga de samba, luche verde, Meersalat, sea lettuce, shih shun, zeesla
Phylum Classification
Chlorophyta
Geographic Distribution
Ulva lactuca is ubiquitous, common to most shorelines around the world.
Uses
Ulva lactuca is available in different forms from companies in countries which include the UK, Ireland, France, Germany, Vietnam, China, Canada, and the United States. It is sold both in fresh and dried form, in flakes, powders, and salad mixes. It is a delicate seaweed with a mild flavor. Ulva lactuca is sometimes eaten as "green laver", but it is considered inferior to purple laver. It is used as a seasoning by itself and in blends, and can be found in soups and salads. It is a key ingredient in many cosmetic and personal care items such as soap, lotion, toner, lifting cream, eye cream, lip cream, makeup remover, body polish, bath soaks, anti-aging products, shaving lotion, shampoo, conditioner, and serums. It is also a component in gardening and fertilizer products. Leading cosmetic brands which use Ulva lactuca as an ingredient in anti-aging products cite that it contains a high concentration of amino acids (proline, glycine, lysine) which are the basic components of proteins, and that it has an ability to stimulate the cells in the connective tissues to synthesize collagen. This in turn can improve the skin’s elasticity and reduces lines and wrinkles.
Harvesting
Ulva lactuca can be picked from spring into the summer depending upon weather and amount of sun. Harsh weather can batter it, leaving it too tattered for picking.
Harvesting Techniques
Ulva lactuca often does not grow in large patches, so harvesting can be a labor intensive effort which only yields small amounts. Scissors or a small knife can be used to carefully cut the blade from the holdfast. If the holdfast is accidentally pulled off from the substrate, the holdfast can be cut from the frond before processing. It should be quickly rinsed in seawater to remove any small animals.
Ecosystem
Ulva lactuca is consumed by many invertebrates both when submerged and when exposed.
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