Abstract: A Pharmaceutical composition and method for inhibiting formation of N-nitrosodimethylamine (NDMA). Within the expiration date of a pharmaceutical composition comprising one selected from metformin, valsartan, irbesartan, losartan, sumatriptan, diltiazem, tetracycline, doxylamine, chlorpheniramine, carbinamine, and/or any salt thereof, the content of NDMA is kept below an acceptable daily intake limit.

Abstract: Provided are a similar material for a rock slope model test under water-rock interaction, and a preparation method and use thereof. The similar material is prepared from raw materials including the following components: an iron powder, a quartz sand, a barite powder, a gypsum, glycerin, water, a gypsum retarding agent, and a dispersible polymer powder. Further, the method for preparing the similar material for a rock slope model test under water-rock interaction is also provided.

Abstract: A Pharmaceutical composition for inhibiting N-nitrosodimethylamine (NDMA) formation, and a method. In a pharmaceutical composition containing a selection of metformin, valsartan, irbesartan, losartan, sumatriptan, diltiazem, tetracycline, doxylamine, Chlorpheniramine, carbinoxamine, and/or any salt thereof, a non-antioxidant acidic component is added, causing N-nitrosodimethylamine content within an effective period of the pharmaceutical to be suppressed to lower than an acceptable daily intake limit therefor.

Abstract: An electrochemical apparatus includes a negative electrode plate. The negative electrode plate includes a negative electrode current collector, a first coating, and a negative electrode active material layer. The first coating is disposed between the negative electrode current collector and the negative electrode active material layer. The first coating includes carbon nanotubes, a first binder, and a first dispersant, and a mass percentage of the carbon nanotubes in the first coating is 50% to 75%.

Abstract: A position detecting device and an elevator system including the same. The position detecting device includes a ruler guide formed with a through groove for receiving and guiding a position ruler of the elevator system, the through groove further has a through opening toward a side surface of the ruler guide; and a limitator is provided at the through opening, the limitator is distributed or extended along a longitudinal direction of the through opening, and the position of the limitator is arranged to correspond to a site of the position ruler without position information.

Abstract: Disclosed is a multilayer solid pharmaceutical dosage form, wherein a core containing an active ingredient is coated with a first sustained-release coating layer, a drug layer containing the active ingredient is applied onto the first layer, and a second sustained-release coating layer is applied onto the drug layer.

Abstract: Disclosed is a method for synthesizing diglyceride using a bubble column reactor. The method comprises the steps of: an immobilized enzyme is placed on the bearing mechanism of the bubble column reactor; a hot bath mechanism is actuated to heat the reactor body to 55-75° C.; glycerol, fatty acid and water are added into a feed chute, preheated to 55-75° C.

Abstract: Disclosed is a method for preparing a medium-long-chain triglyceride using a packed bed reactor, and belongs to the technical field of deep processing and modification of lipids. In the present invention, a medium-chain fatty acid triglyceride and a lipid as raw materials are subjected to a catalyzed transesterification using an immobilized enzyme having a 1,3 position-specificity being capable of catalyzing a transesterification reaction in the packed bed reactor to prepare a medium-long-chain triglyceride; the transesterification product is then subjected to an ethanol extraction to obtain a highly pure medium-long-chain triglyceride product; and the product remaining after the extraction useful as a raw material is backfilled into the reactor and continues to participate in the next batch of preparation of a medium-long-chain triglyceride.

Abstract: Disclosed is a method for synthesizing diglyceride using a bubble column reactor. The method comprises the steps of: an immobilized enzyme is placed on the bearing mechanism of the bubble column reactor; a hot bath mechanism is actuated to heat the reactor body to 55-75° C.; glycerol, fatty acid and water are added into a feed chute, preheated to 55-75° C.

Abstract: Disclosed is a multilayer solid pharmaceutical dosage form, wherein a core containing an active ingredient is coated with a first sustained-release coating layer, a drug layer containing the active ingredient is applied onto the first layer, and a second sustained-release coating layer is applied onto the drug layer.