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Who discovered antimony?

The first written acknowledgement of antimony is found in an Egyptian papyrus from 16th century B.C. In ancient times, antimony was used in pottery or crushed down to a powder and used as eye makeup. During medieval times, antimony was used medically as a laxative. Modern science typically uses alloys of antimony, meaning it is mixed with other metals. These alloys can be found in batteries, semiconductors, paints and other materials.

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What is the electron geometry of SO3?

The central sulfur atom of SO3 has an oxidation state of +6 and a formal charge of +2. In an SO3 compound, three oxygen atoms are positioned at the corners of a triangle, all in one three-dimensional plane. The bond angles between all oxygens is 120 degrees. SO3 is centrosemetric and has no electric dipole.

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What is the scientific name for kingdom fungi?

For instance, molds and yeasts are phylum Ascomycota, aquatic fungi are phylum Chytridiomycota, bread molds and mucor are phylum Zygomycota, and mushrooms and jelly fungi are phylum Basidiomycota.\nApproximately 70,000 fungi have been identified as of 2014, but scientists suspect there may be approximately 1.5 million or more kinds of fungi. Some species have colony masses as big as the largest plants and animals on Earth, even though many individual fungal spores are not visible to the naked eye. Fungi are vital to each ecosystem on the planet, and some fungi are studied to learn about geneti..

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What are disadvantages of artificial selection?

Artificial selection can also have unforeseen consequences, as in the case of Africanized honey bees, also known as killer bees. While the bees were bred to produce more honey, traits which caused an increase in aggressiveness were also inadvertently passed on. This has resulted in the deaths of several people as the bees became increasingly more defensive.\nSelective breeding, another term for artificial selection, may also have a detrimental effect on the species itself, as seen in the inbreeding of dogs in order to maintain the so-called purity of certain breeds. Some breeds of dogs have ma..

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What does the thyroid gland do?

Symptoms of hypothyroidism include feeling tired and cold, having a slower heart rate, and experiencing constipation and unexplained weight gain, notes the Hormone Health Network. Children suffering from hypothyroidism may grow at slower rates than other children.\nPatients with hyperthyroidism often feel nervous, irritable and warm and may have trouble concentrating and sleeping. They may also have faster heart rates, suffer from diarrhea and lose weight unexpectedly, reports the Hormone Health Network.\nAdditional complications can arise in the thyroid gland, including the development of nod..

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What does phloem do?

Plants have two types of transport tissue, xylem and phloem. Xylem tissue distributes water and minerals gathered by the roots to the rest of plant, but it is primarily dead cells. In contrast, phloem consists primarily of living cells. Botanists use the name translocation for the process of moving foods through the phloem using hydrostatic forces and active transport.\nThe sugar solution produced in the leaves is sap. In addition to providing nutrition for other cells, sap is stored in other structures including tubers. Tubers, such as potatoes, allow the plant to survive extreme weather. Whe..

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What are uses of guava leaves?

As with the fruits and flowers, the leaves of guava trees may be used in raw or processed form. They are often ground and mashed to create potent teas and are refined to produce extracts, which in turn create creams, lotions, and additives for tablets and pills.\nAccording to WebMD, Guava leaves contain high levels of Vitamin C and fiber, along with essential oils rich in titerpenoides, aromandreno, beta bisabolene, nerolidiol, flavonoids and carotenoids. They are also considered potent natural pain relievers and are used to alleviate symptoms from a variety of health conditions. They are adde..

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What is the fastest dividing human cell?

Additional fast replicating cells in the human body include cells in the intestines and skin cells, which only live for three weeks. The slowest dividing cells in the body are muscle, nerve and liver cells. Muscle cells fail to carry on mitosis after creation, and nerve cells stop dividing once they reach maturity. Liver cells only divide when a section is removed, such as during a liver transplant.

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What causes a high red blood cell count?

Other secondary causes of a high red blood cell count include smoking, kidney transplants, and living at higher altitudes where the air has less oxygen, according to Mayo Clinic. Anabolic steroids, dehydration and carbon monoxide poisoning are additional causes.\nPolycythemia vera is a genetic mutation that can lead to high red blood cell counts, says MedicineNet. It is very rare and may be accompanied by an enlarged spleen and higher white blood cell and platelet counts. Mutations to the erythropoietin receptor gene also cause primary familial and congenital polycythemia.\nRed blood cell coun..

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How do you find information about wildlife sanctuaries?

The American Sanctuary Association and World Commission on Protected Areas have a similar mission but provide very different resources. While neither provides actual services, such as housing and feeding animals, they provide guidance and technical criteria for humane sanctuaries. Both organizations offer memberships to professionals interested in supporting their objectives.\nThe American Sanctuary Association is a non-profit accrediting organization for other non-profit organizations that provide sanctuary for homeless, abandoned and abused domestic and wild animals. A sanctuary must meet a ..

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