42results about How to "Avoid residual contamination" patented technology

A sample tube holder having sample tube compartments with sets of spaced finger springs provided therein for maintaining sample tubes in substantially upright orientations. A guide structure having a series of openings is used to direct sample tubes into the sample tube compartments and to restrict lateral movement of sample tubes held thereby. A retainer is releasably engaged by the guide structure and has openings sized to provide access to sample tubes held by the sample tube compartments but which restrict vertical movement of the sample tubes. Tabs at a base of the sample tube holder and hold-downs fixed to a stationary structure adjacent a conveyor cooperate to restrict vertical movement of the sample tube holder during automated sampling procedures.

The invention discloses a wine-making preparation method adopting litchi fermentation. The method comprises the following steps: adopting pollution-free excellent quality litchi pulp to make fruit juice concentrate by means of a low-temperature ice-crystal method or a membrane concentration method, and blending the fruit juice concentrate with high dry wine; adding highly concentrated fruit juicefrozen by the low-temperature ice-crystal method or the membrane concentration method into the mixture to keep the typical aroma of litchi fruit wine; adopting yeast strain, lactic acid strain and acetic acid strain to carry out multi-strain coordinated fermentation and adjusting the fermentation conditions; accelerating fermentation and conversion by fruit sugar and glucose cooled after high-temperature acid conversion of sucrose to improve the quality of fermented wine liquid; making use of ultra low temperature cryoprecipitation and triple filtration sterilization to solve the problem of deposition of products during storage and transportation; and adopting non-thermal sterilization filtration and concentration membrane technology to avoid the influence on fruit wine quality caused by thermal sterilization. The wine-making preparation method can obtain a natural litchi fermented wine product with palateful quality.

The invention discloses a food outer packaging disinfection method and device based on the combination of jet flow and coating, which can be used for disinfecting pathogenic microorganisms on the outer surface of food packaging boxes, and can also be used for disinfecting pathogenic microorganisms on the outer surfaces of other packaging boxes. The disinfection method first realizes the sterilization of pathogenic microorganisms on the bottom surface of the packaging box by coating with a chemical disinfectant, and then realizes the sterilization of the top surface and sides of the packaging box by means of a low-temperature plasma jet at atmospheric pressure. Correspondingly, the disinfection device is composed of two parts: a chemical disinfection unit and a low-temperature plasma jet disinfection unit. Wherein, the chemical disinfection unit is composed of a transfer roller partially immersed in the chemical disinfection solution and a storage container for the disinfection solution. The low-temperature plasma jet disinfection unit is composed of a channel-type low-temperature plasma disinfection machine, a transmission mechanism, and an external high-voltage power supply and gas supply equipment.

The invention discloses an original-color bamboo fiber pulp, a preparation method thereof and an application of the bamboo fiber pulp as a tobacco additive. The original-color bamboo fiber pulp is 20-32 degree SR in a pulping degree and is 5-8g in wet weight. The preparation method includes following steps: S1: crush of raw materials: crushing bamboo fiber raw materials into fiber powder through a dry crushing method; S2: a steaming and boiling process: performing the steaming and boiling process to the fiber powder and a steaming and boiling liquid to obtain a low-hardness bamboo pulp; S3: a washing process: performing a crude selection process through a vibrating screen, a black solution extraction process through a vacuum pulp washing machine, a fine selection process through a pressure sieve, a dust removing process through a residue removing device and a pulp washing process through the vacuum pulp washing machine to obtain a screened pulp; S4: a drying process: performing a dewatering and drying process to the screened pulp to obtain an original-color bamboo fiber plate; and S5: a pulping process: performing a pulp crushing process and a pulping process to the original-color bamboo fiber plate with the pulping degree and the wet weight being controlled to prepare the original-color bamboo fiber pulp. The method is simple in operation, is convenient to carry out, is low in cost, and is green and environmental-protective. The original-color bamboo fiber pulp can be used as the tobacco additive, can reduce irritation of a tobacco sheet, can reduce bad smell of wood and the like, and can improve an original smell of tobacco.