Jiangnan University

Xiaofeng Ban

Zhengbiao Gu

Caiming Li

Zhaofeng Li

Li Cheng

Yan Hong

Junnan Jin

Mengwei Zhang

Jian Yin

Yue Wang

Yi Wang

Zexi Li

Qi Liu

Beibei Zhao

Binkun Li

Ruixuan Li

Dongdong Wu

Xiao Zhang

Shixia Xi

Disclosed are a food grade starch based modeling clay with high elasticity and high ductility and its preparation method, belonging to the technical field of modeling clay preparation. The starch based modeling clay provided by the present disclosure is prepared from the following formula components: 160-180 parts of starch, 140-160 parts of water, 10-15 parts of a food grade stabilizer, 10-15 parts of edible salt, 0-10 parts of hydrophilic colloid, 0.6-0.8 parts of a preservative, 40-60 parts of a food grade plasticizer, 6-10 parts of food grade white oil, and 4-8 parts of edible pigment. The starch includes one or a combination of more of cassava starch, wheat starch, and glutinous rice starch. The present disclosure, through combined use of the starch and the hydrophilic colloid, makes the prepared starch based modeling clay have good viscoelasticity and ductility, and good in storage stability, safe and non-toxic.

Food grade starch based modeling clay with high elasticity and high ductility and its preparation method

The invention provides an oligosaccharide debranching enzyme mutant and use thereof in a glucose mother liquor. The mutant is obtained by mutating valine at position 219 in SEQ ID NO: 1 into alanine. According to oligosaccharide debranching enzyme mutant V219A, a primary mother liquor, a secondary mother liquor, or a tail liquid after chromatographic separation is used as a substrate, the percentage contents of glucose in the products are 99.21% (primary mother liquor), 98.89% (secondary mother liquor) and 97.97% (tail liquid after chromatographic separation) respectively, which are 2.86%, 8.64%, and 28.67% higher than that of glucose obtained with the wild-type oligosaccharide debranching enzyme. Therefore, the mutant V219A obviously improves the percentage content of glucose in the glucose mother liquor, and the scope of application of the mother liquor can be expanded by the high product purity and substrate conversion rate, so the mutant V219A has higher industrial application value.

Oligosaccharide debranching enzyme mutant and use thereof in glucose mother liquor

The present disclosure discloses a high-temperature fast-curing starch-based adhesive for particleboards and a preparation method thereof, belonging to the technical field of adhesive preparation. The low viscosity of the starch-based adhesive is ensured by selecting a crosslinking monomer which does not self-crosslink in a reaction process in the present disclosure, and a binary crosslinking agent matched with the crosslinking monomer is added before use to be quickly crosslinked with the crosslinking monomer at high temperature so as to ensure better thermosetting property and water resistance as well as faster curing speed of the starch-based adhesive at the same time, which meets the requirements of the particleboards for the adhesive, solves the problem of long curing time of the existing starch-based adhesives at high temperatures, further shortens the curing time of the starch-based adhesives to about 60 s, and improves the production efficiency of the particleboards.

High-temperature fast-curing starch-based adhesive for particleboards and preparation method thereof

The present disclosure discloses a low-viscosity thermosetting starch adhesive for particleboards, and a preparation method therefore, belonging to the technical field of adhesive preparation. The adhesive of the present invention selects N-hydroxyethyl acrylamide or acetoxyethyl methacrylate as the crosslinking monomer, which has a low degree of crosslinking in the process of adhesive preparation to avoid the problem of increasing viscosity, but can cross-link quickly during the hot pressing process, forming a network structure, and improving the water resistance of the adhesive; and furthermore, itaconic acid is added to promote the self-crosslinking reaction of the crosslinking monomer in the hot-pressing process, thus further improving the water resistance. The properties of the manufactured particleboards reach the standard of P2 type particleboards, so that the adhesive can be suitable for mass production and can be widely applied in the preparation of wood decoration, particleboards, plywood and fiberboard.

Low-viscosity thermosetting starch adhesive for particleboards, and preparation method therefore

Disclosed is a method for preparing high-load oral paclitaxel capsule for a slow release in colon, belonging to the field of porous starch drug loading. The preparation method of the present disclosure includes the following steps: (1) dripping an ethanol solution of paclitaxel into a water phase and drying the solution to obtain an amorphous paclitaxel microsphere; (2) redissolving the paclitaxel microsphere prepared in step (1) in the ethanol solution, dispersing porous starch in the ethanol solution for adsorption, volatilizing a solvent in an oven, washing the porous starch with the ethanol solution to remove unadsorbed paclitaxel, and centrifuging same to obtain a precipitate, namely the porous starch loaded with paclitaxel; and (3) dispersing the porous starch loaded with paclitaxel prepared in step (2) in a chitosan solution, dropwise adding the solution into a phytic acid solution, and stirring the solution for 4 hours to obtain a coated capsule.

Method for preparing high-load oral paclitaxel capsule for slow release in colon

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Wuxi, China

Xiaofeng Ban