博文

目前显示的是 十二月, 2023的博文

salmon breeding migration

 Salmon, like most other fish, go through a series of growth stages from the time the eggs hatch. Because of its high commercial value and the large scale of aquaculture, special industrial terms are used in academic circles to describe the various growth stages of salmon: Funny larvae: billige Sexpuppen  The life of salmon begins in the spawning period, and the female salmon will The eggs are laid between gravels on the bottom of stagnant areas of rivers and streams and then fertilized externally by male salmon. The fertilized eggs hatch into larvae after 2 to 6 months. Alevin: also called "sac fry", is a newly hatched early larvae with a yolk sac. It has no ability to move yet and can only drift with the tide. It has no foraging ability to absorb external nutrients, so it relies on storage. The nutrients in the yolk sac can continue to survive and grow; Juvenile fish (fry): commonly known as "fry". Kleine Brüste Sexpuppen  When the larvae continue to grow for a pe...

diamond

 Diamond (Ancient Greek: ἀδάμας; French, German: Diamant; English: Diamond; Russian: Алмаз), a mineral composed of carbon, is an allotrope of graphite, one of the five key gemstones, Chemistry and industrial applications as diamond. Diamonds are colorless crystals composed of carbon and are the hardest natural substances known. Sexpuppe chemical properties Each carbon atom in the crystal forms a covalent bond with four other adjacent carbon atoms in sp3 hybrid orbitals, and each four adjacent carbon atoms form a regular tetrahedron. The crystal type is a diamond structure, so the crystal shape without polishing is often an octahedron. The C-C bond in diamond is very strong, and all valence electrons participate in the formation of covalent bonds. There are no free electrons, so diamond is very hard, non-conductive, and has a melting point of 3815°C. The ignition point of diamond is 720-800℃ in pure oxygen and 850-1,000℃ in air. Industrially, diamond is mainly used to make drilling ...