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Transuranium element
Transuranium element, any of the chemical elements that lie beyond uranium in the periodic table—i.e., those with atomic numbers greater than 92. Twenty-six of these elements have been discovered and named or are awaiting confirmation of their discovery. Eleven of them, from neptunium through lawrencium, belong to the actinoid series. The others, which have atomic numbers higher than 103, are referred to as the transactinoids. All the transuranium elements are unstable, decaying radioactively, with half-lives that range from tens of millions of years to mere fractions of a second.
Since only two of the transuranium elements have been found in nature (neptunium and plutonium) and those only in trace amounts, the synthesis of these elements through nuclear reactions has been an important source of knowledge about them.
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rupali
Tuesday, Aug 10, 2021
AGRI-FOOD SYSTEMS
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Neutron capture
It is believed that these heavier elements, and some isotopes of lighter elements, have been produced by successive capture of neutrons. Two processes of neutron capture may be distinguished: the r -process, rapid neutron capture; and the s -process, slow neutron capture. If neutrons are added to a stable nucleus, it is not long before the product nucleus becomes unstable and the neutron is converted into a proton. Outside a nucleus, a neutron decays into a proton and an electron by a process called beta decay (β-decay). Inside a nucleus it can be stable if the nucleus does not contain too many neutrons. In slow neutron capture, neutrons are added at a rate such that whenever an unstable nucleus is formed, it beta-decays before another neutron can be added. If neutrons can be added more rapidly, as in the r -process, the unstable nuclei formed cannot decay before additional neutrons are added until a nucleus is eventually produced that will not accept a further neutron. This nucleus, however, will eventually be subject to beta decay, thus permitting further neutron capture.
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rupali
Tuesday, Aug 10, 2021
AGRI-FOOD SYSTEMS
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Computer architecture, structure
Computer architecture, structure of a digital computer, encompassing the design and layout of its instruction set and storage registers. The architecture of a computer is chosen with regard to the types of programs that will be run on it (business, scientific, general-purpose, etc.). Its principal components or subsystems, each of which could be said to have an architecture of its own, are input/output, storage, communication, control, and processing.
https://aap-qa.apps.venturit.org/playlist/education-systems
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rupali
Friday, Aug 6, 2021
YOUTH EMPOWERMENT
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Conservation of Water
Water is one of the basic necessities for every living being and we cannot imagine a life without water. It is the natural resource and the main constituent of our planet earth. Water is the universal solvent and plays a key role in the existence of various forms of life on the planet earth. It is widely used for various purposes such as washing, bathing, cleaning, cooking, drinking, and other industrial and domestic uses.
Water is a colourless and odourless substance that is essential for the survival of living beings. There are various sources of water such as wells, rivers, ponds, lakes, oceans, big dams, and streams. As we all know, nearly 70 to 80 percent of the Earth’s surface is covered by water, among which only 1-2 per cent water is pure and suitable for human use.
Conservation of water mainly refers to protect, preserve, and control the usage of water and its resources. It is the system introduced to manage freshwater, reduce the wastage and protect the water and its resources in order to reduce and to avoid the scarcity. Therefore, we all should come forward to create awareness about conservation of water among our own friends, family, neighbours, society, etc. Conservation of water is very much essential as it saves life on earth.
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rupali
Tuesday, Jul 27, 2021
AGRI-FOOD SYSTEMS
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The atomic nature of the elements
Paralleling the development of the concept of elements was an understanding of the nature of matter. At various times in history, matter has been considered to be either continuous or discontinuous. Continuous matter is postulated to be homogeneous and divisible without limit, each part exhibiting identical properties regardless of size. This was essentially the point of view taken by Aristotle when he associated his elemental qualities with continuous matter. Discontinuous matter, on the other hand, is conceived of as particulate—that is, divisible only up to a point, the point at which certain basic units called atoms are reached. According to this concept, also known as the atomic hypothesis, subdivision of the basic unit (atom) could give rise only to particles with profoundly different properties.
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rupali
Tuesday, Jul 27, 2021
AGRI-FOOD SYSTEMS
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Solar System
The Solar System is the gravitationally bound system of the Sun and the objects that orbit it, either directly or indirectly. Of the objects that orbit the Sun directly, the largest are the eight planets, with the remainder being smaller objects, the dwarf planets and small Solar System bodies. Of the objects that orbit the Sun indirectly—the natural satellites—two are larger than the smallest planet, Mercury.
One of Billions. Our solar system is made up of a star, eight planets and countless smaller bodies …
Meet Me in the Orion Arm. Our solar system orbits the center of the Milky Way Galaxy at about …
A Long Way Round. It takes our solar system about 230 million years to complete one orbit around …
Spiraling Through Space. There are three general kinds of galaxies: elliptical, spiral and irregular.
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rupali
Friday, Jul 23, 2021
CULTURE AND SOCIETY
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Polyploidy
Genomic analysis also has shown that one of the important mechanisms of evolution is multiplication of chromosome sets, resulting in polyploidy (“many genomes”). In plants and animals, spontaneous doubling of chromosomes can occur. In some plants, the chromosomes of two related species unite via cross-pollination to form a fusion product. This product is sterile because each chromosome needs a pairing partner in order for the plant to be fertile. However, the chromosomes of the fusion product can accidentally double, resulting in a new, fertile species. Wheat is an example of a plant that evolved by this means through a union between wild grasses, but a large proportion of plants went through similar ancestral polyploidization.
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rupali
Wednesday, Jul 21, 2021
HEALTH AND NUTRITION
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shoot systems
Entire shoot systems are often modified for such special functions as climbing, protection, adaptation to arid habitats, and water or food storage. The modifications generally involve structural and shape changes to the stem and the reduction of the leaves to small scales. Many of the modifications parallel those previously described for leaves. In the passion flower (Passiflora; Passifloraceae) and grape (Vitis vinifera; Vitaceae), axillary buds develop as tendrils with reduced leaves and suppressed axillary buds. In the grape these axillary tendrils are actually modified and reduced inflorescences. In the plant from which strychnine is obtained (Strychnos nux-vomica), the axillary buds develop into hooks for climbing.
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rupali
Monday, Jul 19, 2021
AGRI-FOOD SYSTEMS
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Asparagus ornamental plants
Asparagus, (genus Asparagus), genus of the family Asparagaceae with up to 300 species native from Siberia to southern Africa. Best known is the garden asparagus (Asparagus officinalis), cultivated as a vegetable.for its succulent spring stalks. Several African species are grown as ornamental plants.
Asparagus species may be erect or climbing, and most of the species are more or less woody. The rhizomelike, or sometimes tuberous, roots give rise to conspicuous fernlike branchlets. True leaves are reduced to small scales. Many species are dioecious (individuals are either male or female), and the small greenish yellow flowers in the spring are followed by red berries in the fall. Members of the genus are characterized by the presence of cladodes, which are leaflike organs in the axils of the true leaves.
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rupali
Friday, Jul 16, 2021
AGRI-FOOD SYSTEMS
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Article : Water substance composed of the chemical elements hydrogen and oxygen
Water, a substance composed of the chemical elements hydrogen and oxygen and existing in gaseous, liquid, and solid states. It is one of the most plentiful and essential compounds. A tasteless and odourless liquid at room temperature, it has the important ability to dissolve many other substances. Indeed, the versatility of water as a solvent is essential to live organisms. Life is believed to have originated in the aqueous solutions of the world’s oceans, and living organisms depend on aqueous solutions, such as blood and digestive juices, for biological processes. Water also exists on other planets and moons both within and beyond the solar system. In small quantities, water appears colourless, but water actually has an intrinsic blue colour caused by slight absorption of light at red wavelengths.
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Vijaya Super admin
Thursday, Jul 15, 2021
AGRI-FOOD SYSTEMS
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Ankylosing Spondylitis
arthritis causes painful inflammation in the spine. Over time, it may make your vertebrae -- the small bones of the spine -- fuse together. It can also inflame other joints, like hips and knees, and it can damage your eyes, heart, and other organs. There's no cure, but treatment and taking care of yourself can often slow it down or prevent it from getting worse
Ref: https://www.webmd.com/ankylosing-spondylitis/ss/slideshow-ankylosing-spondylitis-overview
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rupali
Monday, Jul 12, 2021
EDUCATION
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Drink Enough water
It’s common to get a little constipated if you don’t drink enough water. Inactivity, diet changes, illness, and even stress can add to the problem. Constipation usually passes on its own, but you can help move things along with exercise, over-the-counter meds, and of course, water.
See a doctor if your constipation lasts for more than a week or two or you have dizziness, bad pain in your belly, or blood in your stool. These could be signs of something more serious.
Read more follow : https://www.webmd.com/a-to-z-guides/ss/slideshow-drink-enough-water
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rupali
Monday, Jul 12, 2021
AGRI-FOOD SYSTEMS
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