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wikiuntamed · 23 days

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On this day in Wikipedia: Friday, 5th April

Welcome, velkommen, selamat datang, bienvenue 🤗 What does @Wikipedia say about 5th April through the years 🏛️📜🗓️?

5th April 2022 🗓️ : Death - Jimmy Wang Yu Jimmy Wang Yu, Taiwanese actor (b. 1943) "Jimmy Wang Yu (28 March 1943 – 5 April 2022) was a Hong Kong-Taiwanese martial artist, actor, film director, producer, and screenwriter. Initially a contract player for Shaw Brothers, he rose to fame for his starring role in One-Armed Swordsman (1967) and its sequels, and was one of the first major..."

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5th April 2019 🗓️ : Death - Sydney Brenner Sydney Brenner, South African biologist (b. 1927) "Sydney Brenner (13 January 1927 – 5 April 2019) was a South African biologist. In 2002, he shared the Nobel Prize in Physiology or Medicine with H. Robert Horvitz and Sir John E. Sulston. Brenner made significant contributions to work on the genetic code, and other areas of molecular biology while..."

Image licensed under CC BY 2.0? by OIST from Onna Village, Japan

5th April 2014 🗓️ : Death - Mariano Díaz (cyclist) Mariano Díaz, Spanish cyclist (b. 1939) "Mariano Díaz Díaz (17 September 1939 – 5 April 2014) was a Spanish professional road bicycle racer. In 1967, he won a stage of the 1967 Vuelta a España, and also won the mountains classification. He also competed in the individual road race and team time trial events at the 1964 Summer Olympics...."

5th April 1974 🗓️ : Birth - Vyacheslav Voronin Vyacheslav Voronin, Russian high jumper "Vyacheslav Nikolayevich Voronin (Russian: Вячеспав Никопаевич Воронин; born 5 April 1974 in Vladikavkaz) is a Russian track and field athlete who specialised in the high jump. Voronin was a World Champion (1999) and European Indoor Champion (2000). His personal best is 2.40 metres, set in London in..."

5th April 1924 🗓️ : Death - Victor Hensen Victor Hensen, German zoologist (b. 1835) "Christian Andreas Victor Hensen (10 February 1835 – 5 April 1924) was a German zoologist and marine biologist (planktology). He coined the term plankton and laid the foundation for biological oceanography and quantitative studies...."

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5th April 1822 🗓️ : Birth - Émile de Laveleye Émile Louis Victor de Laveleye, Belgian economist (d. 1892) "Émile Louis Victor de Laveleye (5 April 1822 – 3 January 1892) was a Belgian economist. He was one of the co-founders of the Institut de Droit International in 1873...."

Image by Louis Bertrand (1869-1937)

5th April 🗓️ : Holiday - International Day of Conscience "The International Day of Conscience is a global day of awareness celebrated on April 5, commemorating the importance of human conscience. It was established by the United Nations General Assembly on July 25, 2019, with the adoption of UN resolution 73/329. The first International Day of Conscience..."

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lets-sabbir-blog · 7 years

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Life with tumblr,

See whats it capacity..

Microphyte

From Wikipedia, the free encyclopedia

Microalgae CSIRO

Collection of microalgae cultures, CSIRO

Microphytes or microalgae are microscopic algae, typically found in freshwater and marine systems living in both the water column and sediment.[1] They are unicellular species which exist individually, or in chains or groups. Depending on the species, their sizes can range from a few micrometers (µm) to a few hundred micrometers. Unlike higher plants, microalgae do not have roots, stems, or leaves. They are specially adapted to an environment dominated by viscous forces. Microalgae, capable of performing photosynthesis, are important for life on earth; they produce approximately half of the atmospheric oxygen[2] and use simultaneously the greenhouse gas carbon dioxide to grow photoautotrophically. Microalgae, together with bacteria, form the base of the food web and provide energy for all the trophic levels above them. Microalgae biomass is often measured with chlorophyll a concentrations and can provide a useful index of potential production. The standing stock of microphytes is closely related to that of its predators. Without grazing pressures the standing stock of microphytes dramatically decreases[3]

The biodiversity of microalgae is enormous and they represent an almost untapped resource. It has been estimated that about 200,000-800,000 species in many different genera exist of which about 50,000 species are described.[4] Over 15,000 novel compounds originating from algal biomass have been chemically determined.[5] Most of these microalgae species produce unique products like carotenoids, antioxidants, fatty acids, enzymes, polymers, peptides, toxins and sterols.

Contents

1 Characteristics and uses

2 Aquaculture

3 See also

4 References

5 External links

Characteristics and uses

The microalgae Nannochloropsis sp., viewed under a light microscope

The chemical composition of microalgae is not an intrinsic constant factor but varies over a wide range, both depending on species and on cultivation conditions. Some microalgae have the capacity to acclimate to changes in environmental conditions by altering their chemical composition in response to environmental variability. A particularly dramatic examples is their ability to replace phospholipids with non-phosphorus membrane lipids in P-depleted environments.[6] It is possible to accumulate the desired products in microalgae to a large extent by changing environmental factors, like temperature, illumination, pH, CO2 supply, salt and nutrients. Microphytes also produce chemical signals which contribute to prey selection, defense, and avoidance. These chemical signals affect large scale tropic structures such as algal blooms but propagate by simple diffusion and laminar advective flow.[7][8] Microalgae such as microphytes constitute the basic foodstuff for numerous aquaculture species, especially filtering bivalves. Photosynthetic and chemosynthetic microbes can also form symbiotic relationships with host organisms.

They provide them with vitamins and polyunsaturated fatty acids, necessary for the growth of the bivalves which are unable to synthesize it themselves.[9]

In addition, because the cells grow in aqueous suspension, they have more efficient access to water, CO2, and other nutrients. Microalgae play a major role in nutrient cycling and fixing inorganic carbon into organic molecules.

While fish oil has become famous for its omega-3 fatty acid content, fish don't actually produce omega-3s, instead accumulating their omega-3 reserves by consuming microalgae. These omega-3 fatty acids can be obtained in the human diet directly from the microalgae that produce them.

Aquaculture

Main article: Culture of microalgae in hatcheries

A range of microalgae species are produced in hatcheries and are used in a variety of ways for commercial purposes. Studies have estimated main factors in the success of a microalgae hatchery system as the dimensions of the container/bioreactor where microalgae is cultured, exposure to light/irradiation and concentration of cells within the reactor.[10]