40 results about "Blood feeding" patented technology

This invention relates to a group of compounds for repelling blood-feeding ectoparasitic arthropods, and a method of deterring their landing and feeding on animals including humans, by applying in one or more formulations compounds that incorporate one or more sulfide and one or more hydroxyl groups to the skin, clothing or environment of animals, including humans. A method of repelling and deterring landing and feeding by blood-feeding arthropods on an animal by applying in effective amount one or more compounds that incorporate alkyl sulfide and alcohol moieties, or alkyl sulfide and amide moieties, or alkyl sulfide and amide moieties to the skin, clothing or environment of an animal.

The invention discloses a leech feed, made from the following materials according to parts by weight: 80-160 parts of fresh blood, 1-20 parts of a bacterial strain, 1-10 parts of ascorbic acid, 0.5-3 parts of vitamin B, 5-10 parts of arginine, 5-10 parts of brown sugar, 10-15 parts of probiotics, 5-10 parts of gluconolactonase, 2-5 parts of astaxanthin, 1-2 parts of sodium citrate, 5-15 parts of glutamic acid, 2-3 parts of compound zinc protein, 1-2 parts of selenium yeast, and 1-3 parts of Chinese medicine components; the Chinese medicine components include alfalfa, garlic bulb, carrot, endothelium Corneae Gigeriae Galli, Fructus citrus Sarcodactylis, Coptis chinensis root, Trigonella seed, peppermint, papaya and Hericium erinaceus. The invention also discloses a preparation method of the leech feed. The problem that direct blood feeding for leech in the prior art results in incomplete nutrition, bad results, low leech growing speed and blood supply tension is solved.

A catheter system and method are provided which change the temperature of a fluid, such as blood, by heat transfer. Selective cooling or heating of an organ may be performed by changing the temperature of the blood feeding the organ. The catheter system includes an inlet lumen and an outlet lumen structured and arranged to carry a working fluid having a temperature different from the adjacent blood. The outlet lumen is configured to induce turbulence in the adjacent fluid passing adjacent the outlet lumen.

The invention relates to a human brain arteriovenous malformation biomechanics model and an in vitro establishing method thereof. The system comprises a power pump, a gas replacement device, a pressure sensor, a malformation vascular model, a normal bran microvascular model and a liquid storage bottle which are connected in sequence and form a blood feeding artery model circulation loop, wherein the malformation vascular model and the normal bran microvascular model are arranged in parallel. The invention provides the human brain arteriovenous malformation biomechanics model and the in vitro establishing method thereof, which are used for developing research on brain blood vessel fluid dynamics, cytobiology and a vessel malformation mechanism.

The invention relates to a device for adjusting the length of a bleeding needle tube. A lower cover having an opening is thread-engaged at the lower side of the tube body. The length adjusting device is arranged inside the needle body, consisting of a blood feeding material inserted to the lower side of an impact material and a needle length adjusting area thread-engaged with the blood feeding material. A reinforcing bone is arranged above the blood feeding material. An exciting heave is arranged above the reinforcing bone while a helix part is arranged below the reinforcing bone. A blood feeding needle is arranged below the helix part. A fixing body of the needle is thread-engaged with the needle length adjusting area so that the operator can observe through eyes at the same time adjust the length of the needle simply and conveniently according to the selective operation of the needle adjusting area. Besides, the length of the needle can be adjust by arranging the fixing body of the needle on a blood feeding tube which has no function of adjusting the length of the needle so as to expand the application scope of the invention. The invention implements the strong and weak excitations on skins selectively by arranging exciting heaves with different models at the upper end and the lower end of the fixing body of the needle, thereby doubly increasing the excitation effect.

The invention discloses a thrombus filtering blood recycling device. The thrombus filtering blood recycling device comprises a thrombus removing device, a pressure regulator, a blood feeding pipe, a blood returning pipe and a blood cavity, wherein a blood inlet connected with the blood feeding pipe is formed in the upper part of the blood cavity and a pressure regulating hole connected with the pressure regulator; the blood feeding pipe is further provided with an anti-condensation tank filled with anti-condensation blood; and a blood discharging pipe connected with the thrombus removing device is arranged at the bottom of the blood cavity. The invention aims at providing the recycling device for recycling thrombus filtering blood, which has a relatively good thrombus removing effect, can recycle the drawn blood and can be washed; and the thrombus filtering blood recycling device disclosed by the invention is rapid in filtering speed, and the filtering speed is convenient to regulate so that the device is relatively safe.

This invention provides compositions and methods for detection of hematophagous ectoparasitic activity in an enclosure or area. The compositions comprise a reagent or reagents which are reactive against antigens or markers as they appear in the excrement or other ectoparasitic materials. Such markers or antigens may be produced by the ectoparasite itself or may have been introduced into the ectoparasite because of its blood feeding activity. The method of the present invention comprises collecting from the enclosure or area, a sample comprising environmental dust or materials and subjecting the sample to tests for detecting the presence of hematophagous ectoparasitic markers, host markers or both.

The invention relates to a device and method of preparing heme iron. The device comprises an electric separating cylinder, a direct current power supply, a blood feeding barrel, a blood discharging barrel and a valve. The electric separating cylinder comprises a glass cylinder, positive and negative electrode plates, a filter cartridge and a valve. According to the preparation device, the positive and negative electrode plates are separately connected to two end plates in the rectangular glass cylinder of the electric separating cylinder, the filter cartridge for collecting heme iron is inserted into the negative electrode plate, an opening in one side of the filter cartridge is connected to an ionic membrane, the bottom of the glass cylinder is connected to a valve, the blood discharge barrel is arranged below the valve, the blood feeding barrel is mounted above the glass cylinder, the voltage of a direct current power supply can be adjusted, and the anode and cathode of the direct current power supply are electrically connected to the negative electrode plates; the preparation method comprises the steps: pouring animal blood into the blood feeding barrel, wherein the blood flows into the glass cylinder as an electrolyte; connecting the power supply of the negative electrode plates, wherein under the action of the direct current voltage, heme iron ions with positive charges in the blood are separated and migrate to the negative electrode plate; and collecting the heme iron ions through the ionic membrane on the filter cartridge in the filter cartridge to periodically take out heme iron in the filter cartridge powder which is dried for later use. According to the device and method of preparing heme iron, high purity heme iron can be prepared for iron-supplementing drugs and foods.