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45 results about "Tetrapod" patented technology

Tetrapods (/ˈtɛtrəpɒd/; from Greek: τετρα- "four" and πούς "foot") are four-limbed (with a few exceptions, such as snakes) animals constituting the superclass Tetrapoda. It includes extant and extinct amphibians, reptiles (including dinosaurs and therefore birds), and mammals. Tetrapods evolved from a group of animals known as the Tetrapodomorpha which, in turn, evolved from ancient Sarcopterygii (lobe-finned fishes) around 390 million years ago in the middle Devonian period; their forms were transitional between lobe-finned fishes and the four-limbed tetrapods. The first tetrapods (from a traditional, apomorphy-based perspective) appeared by the late Devonian, 367.5 million years ago; the specific aquatic ancestors of the tetrapods, and the process by which they colonized Earth's land after emerging from water remains unclear. The change from a body plan for breathing and navigating in water to a body plan enabling the animal to move on land is one of the most profound evolutionary changes known. The first tetrapods were primarily aquatic. Modern amphibians, which evolved from earlier groups, are generally semiaquatic; the first stage of their lives is as fish-like tadpoles, and later stages are partly terrestrial and partly aquatic. However, most tetrapod species today are amniotes, most of those are terrestrial tetrapods whose branch evolved from earlier tetrapods about 340 million years ago (crown amniotes evolved 318 million years ago). The key innovation in amniotes over amphibians is laying of eggs on land or having further evolved to retain the fertilized egg(s) within the mother.

Preparation method of antibacterial polyvinyl acetal fibre

The invention relates to a preparation method of an antibacterial polyvinyl acetal fibre, and the method comprises the following steps of: (1), after uniformly mixing tetrapod-like zinc oxide whiskers and palygorskite fibre, roasting in a vacuum furnace, after cooling, stirring and dispersing sodium hexametaphosphate in absolute ethyl alcohol, then, carrying out atmospheric pressure plasma treatment, ultrasonically dispersing in de-ionized water containing calcium stearate dispersion liquid, taking suspension whiskers in the upper layer of the solution to be filtered, taking a whisker mixed solution, repeating the operation till filtering and purifying, and after filtering and purifying, drying in a vacuum oven, thereby obtaining an antibacterial whisker mixture; (2), taking a titanate coupling agent, diluting and uniformly mixing the titanate coupling agent by using isopropanol, and, after heating, stirring and drying the titanate coupling agent with the antibacterial whisker mixture obtained in the step (1) in a mixing machine; and then, adding a silver antibacterial agent, a silver-loaded zirconium phosphate antibacterial agent, a zeolite antibacterial agent, an EPP (Foamed Polypropylene) bulking agent and calcium stearate, after stirring in the mixing machine, adding a polyvinyl alcohol spinning solution, and stirring at a high speed, thereby obtaining a broad-spectrum antibacterial polyvinyl alcohol spinning solution; and (3), mixing, filtering and defoaming the broad-spectrum antibacterial polyvinyl alcohol spinning solution obtained in the step (2), spinning by using a wet method or a dry method, and carrying out acetalation treatment, thereby obtaining broad-spectrum antibacterial polyvinyl acetal fibre.
Owner:浙江旭亿新材料科技股份有限公司

Method for increasing survival rate during food-changing period of Juvenile Abalone

The invention relates to a method for improving the survival rate of young abalones during the food conversion period. The method is characterized in that while young abalones are fertilized, a palatable bait on tetrapod bricks is cultivated in a pond which is used for cultivating the young abalones in future, the pond is covered with a sunshade net, and the illumination intensity is controlled at 3,000-5,000lux; after the dirt on the surface of the tetrapod bricks is completely removed, the tetrapod bricks are imbricately arrayed in the pond, filtrated seawater is added to the pond to 45-55cm in depth, the selected mixed unicellular algae species are inoculated and separated, slightly aerated, cultivated in still water for 12-24h and moderately added with more air; the algae on the tetrapod bricks is cultivated in long running water by adopting the conventional condition that an abalone algae bait is cultivated by a plastic film; one month later, the young stripping abalones are put into the pond, meanwhile, artificial baits such as the abalone bait, minced gracilaria, kelp, and the like, are fed and feeding amount of the artificial baits are gradually increased. The method for improving the survival rate of the young abalones has the advantages that the survival rate of the young abalones is greatly improved as the food conversion time is prolonged from 1 day to 1 week, the operation method is simple and the effect is obvious.
Owner:HAINAN UNIVERSITY

Organic waste gas high-temperature pyrolysis device

The invention relates to an organic waste gas high-temperature pyrolysis device. The organic waste gas high-temperature pyrolysis device comprises a shell box body, a quartz tube, a zinc oxide honeycomb ceramic and a magnetron; the shell box body is provided with an organic waste gas inlet and an organic waste gas outlet; the quartz tube is arranged in the shell box body, one end of the quartz tube is arranged at the organic waste gas inlet, and the other end of the quartz tube is arranged at the organic waste gas outlet; the quartz tube is filled with the zinc oxide honeycomb ceramic to forma microwave high-temperature reaction bed; the magnetron is arranged outside the shell box body and used for carrying out radiation heating on the zinc oxide honeycomb ceramic; and a resonant cavity is formed inside the shell box body. According to the invention, the characteristic that tetrapod-shaped nano ZnOw can be rapidly heated under the action of microwaves is applied to the field of high-temperature purification of organic waste gas, the temperature of the waste gas entering the device is controlled by adjusting the power of the microwaves, and the organic waste gas is subjected to high-temperature pyrolysis reaction in a high-temperature environment so as to achieve a purpose of waste gas purification. The device is high in waste gas decomposition rate, high in heating rate and accurate and controllable in temperature.
Owner:WUHAN UNIV OF TECH

Method for continuously producing nano tetrapod-like zinc oxide from secondary zinc slag

The invention discloses a method for continuously producing nano tetrapod-like zinc oxide from secondary zinc slag. The method comprises a batching step: crushing and screening the secondary zinc slag, and weighing certain amount of secondary zinc slag as a raw material; a raw material melting, evaporating and oxidizing step: putting the weighed raw materials into a quartz crucible, putting the quartz crucible to the bottom of a crucible furnace, heating the crucible furnace until zinc in the raw materials is completely evaporated, stopping heat, leaving the residues at the bottom of the quartz crucible, controlling oxygen content in the crucible furnace, and enabling zinc to completely react with oxygen gas; a product collecting step: after the zinc completely reacts with the oxygen gas,taking out the quartz crucible, naturally cooling at the room temperature, scrapping the outer surface and the inner upper-layer surface of the quartz crucible to obtain white flocculent nano tetrapod-like zinc oxide crystal whisker. The method can utilize secondary zinc slag zinc-containing waste to produce the tetrapod-like zinc oxide crystal whisker which is stable in quality, is uniform in component, is single in shape and is fine in particle, so that the preparation cost of the nano tetrapod-like zinc oxide is reduced, and the secondary zinc slag is prevented from polluting the environment.
Owner:HANDAN IRON & STEEL GROUP +1

Medium-and-large-sized quadruped animal behavior identification method based on architecture search graph convolutional network

A medium and large quadruped animal behavior recognition method based on a framework search graph convolutional network comprises the following steps: firstly, based on animal skeleton behavior feature extraction, aiming at medium and large quadruped animal video images in a complex field environment, using a pose estimation algorithm DeepLabCut to quickly track the positions of animal body part joint points, forming a space-time skeleton graph, and carrying out space-time feature extraction on the basis of the space-time skeleton graph; and the spatial-temporal characteristics of different behaviors of the quadruped animal are captured. Then, a plurality of space-time diagram convolution operation modules based on animal skeletons are designed, a graph-based search space is formed, residual connection, a bottleneck structure and various attention mechanisms are fused, and the network is lighter while the performance of the recognition model is improved. And then, realizing the continuity of a search space based on a microarchitecture search strategy so as to automatically search a low-cost space-time diagram convolution model for behavior identification of medium and large quadruped animals, and finally realizing the purpose of distinguishing daily behaviors of the animals, thereby having a certain application prospect.
Owner:NANJING FORESTRY UNIV

Four-leg moxibustion tube

The invention relates to an acupuncture and moxibustion instrument, in particular to a four-legged moxibustion tube. The purpose of the present invention is to provide a moxibustion tool capable of removing the moxa smoke oil adhered to the inner wall of the moxibustion box, the moving range of the moxa stick segments is small, and moxibustion in multiple directions. The four-legged moxibustion tube sequentially includes a moxa-burning treatment tube, an ashes-connecting treatment net, four square feet, and a moxa stick support frame at the lower part of the moxa-burning treatment tube. The inner diameter of the burning moxa treatment tube is slightly thicker than that of the moxa stick; the moxa stick support frame is cross-shaped and is located at the lower part of the burning moxa treatment tube and the ash-receiving treatment net; the ash-receiving treatment net is located at the lower end of the moxa burning treatment tube, which can be removed Drop; four square feet distribute the moxibustion tube in four symmetrical directions to support the moxibustion tube. The advantage of the present invention is that the moxibustion treatment can be performed vertically upward through the treatment tube; it can also be treated downward through the anti-ash net, and moxibustion can also be performed with partitions. The position of the moxa section is fixed, and the heat of the moxa is concentrated. The tube moxibustion box is safe and reliable, has low manufacturing cost, and is easy to be widely popularized and applied.
Owner:龙红慧
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