Wuhan Desheng Biochemical Technology Co., Ltd

In the field of in vitro diagnostic materials, EPS-G7 amylase substrate and DGGR lipase substrate are key components in pancreatic disease diagnostic kits. For a long time, the synthesis technology of these two high-end enzyme substrates has been mastered by a few overseas companies, and domestic IVD production enterprises face practical problems such as long procurement cycles, high costs, and unstable supply chains. Hubei Xindesheng Material Technology Co., Ltd. has achieved technological breakthroughs in the synthesis and mass production of EPS-G7 and DGGR through continuous process research, forming multiple advantages in localized production. Breakthroughs in independent processes and mastery of key technologies The molecular structures of EPS-G7 and DGGR are complex, with multiple synthesis steps and difficult purification, requiring strict process control. The technological accumulation and patent layout of overseas enterprises in this field have formed certain barriers to entry. Based on years of research and development experience in the field of chromogenic substrates, Xindesheng has systematically optimized the synthesis routes of EPS-G7 and DGGR, successfully overcoming the difficulties of preparing key intermediates and purifying final products, and achieving stable mass production of products at the kilogram level. This breakthrough has enabled New Desheng to have independent production capabilities for these two products and master the full process technology from raw materials to finished products. Performance comparable to imported, reliable quality The purity of New Desheng EPS-G7 and DGGR products has reached a high level. EPS-G7 has been tested in multiple batches and its purity can be stably controlled at over 98%, with good control of key impurity levels; DGGR products have also met the relevant requirements in terms of isomer content and free chromophore control. The stability of the product has been verified through long-term monitoring, and the consistency between batches meets the requirements for the production of diagnostic reagents. The results of clinical sample equivalence testing show that the detection values of New Desheng products match the trend of imported brands, with a relatively small deviation controlled within a small range, and have the technical feasibility of replacing imported products for clinical testing. High cost-effectiveness advantage, reducing procurement costs As a local manufacturer, New Desheng's product pricing does not require the addition of tariffs and intermediary premiums. The domestically produced EPS-G7 and DGGR substrates can significantly reduce the raw material procurement costs of downstream reagent production enterprises. For IVD production enterprises that need to face the pressure of centralized procurement prices, optimizing raw material costs can help enhance the profit margin and market competitiveness of their products. Worry free local supply, shortened delivery cycle The layout of domestic production bases makes supply chain management simpler. After the customer places an order, New Desheng products can be shipped directly from the local warehouse without going through international logistics, customs clearance, and other processes, greatly shortening the delivery cycle. For urgent replenishment or urgent orders, localized production can respond faster and effectively reduce customer inventory pressure. In the context of global supply chain fluctuations, local supply channels also provide customers with additional supply guarantees. One stop raw material matching, convenient service New Desheng's product line covers multiple categories, including biological buffering agents (Tris, HEPES, MOPS, etc.), chromogenic substrates (TOOS, MAOS, etc.), and enzyme preparations. For the development and production of diagnostic reagents for pancreatitis, Xindesheng not only provides two core substrates, EPS-G7 and DGGR, but also synchronously provides the required buffer raw materials to help customers simplify supplier management and reduce comprehensive procurement costs. The current production capacity of EPS-G7 substrate produced by Desheng has reached 400 grams per month and will be increased to the kilogram level in the near future; The substrate production capacity of DGGR is 30 grams per month, which can meet the demand for small and medium-sized batch supply. With the gradual release of production capacity and continuous iteration of technology, Xindesheng will form a more complete localized product matrix in the field of enzymatic substrates.  

Against the backdrop of the continuous development of water-based coating technology, CAPS, as a hydrophilic modifier in the field of water-based polyurethane curing agents, reacts with aliphatic polyisocyanates to generate high-performance sulfonic polyurethane derivatives, providing film-forming and cross-linking performance guarantees for water-based coatings. This derivative serves as an efficient emulsifier and is a key foundation for constructing stable water dispersible curing agent systems. Overcoming the difficulties of water dispersion technology Untreated polyisocyanate curing agents have strong hydrophobicity, and direct addition to water will result in significant phase separation, which cannot form a uniform curing system. The sulfonated polyurethane derivatives generated after CAPS modification can significantly reduce the interfacial tension, so that the curing agent can form a stable, uniform and finely dispersed lotion in water. The improvement of this dispersed state is a prerequisite for subsequent cross-linking reactions and the realization of coating properties. The acquisition of fine lotion means that the curing agent particles are evenly distributed in the aqueous phase, with moderate particle size and good stability. In this dispersed state, the NCO groups in the curing agent can fully contact the hydroxyl and other active groups in the water-based resin, resulting in higher crosslinking reaction efficiency. Thoroughly solved the technical pain points of traditional curing agents being difficult to form films and prone to agglomeration, ensuring system uniformity. Excellent storage stability The modified curing agent system exhibits outstanding anti precipitation performance. It can maintain a clear and transparent state for a long time under normal temperature storage conditions, without turbidity, stratification, or precipitation. This stability is of great significance for practical applications. The shelf life of coating products is one of the key indicators that customers are concerned about. If the curing agent experiences delamination, precipitation, or thickening during storage, it not only affects the user experience but may also directly lead to a decrease in coating performance. The performance of CAPS modified curing agent system in terms of stability effectively extends the shelf life and service life of the product. Comprehensive optimization of coating performance The water-based coating prepared using CAPS modified curing agent has achieved improvements in multiple performance dimensions. Fast drying means that the coating can quickly reach a touchable or transportable state after construction, shortening the construction period. A high degree of curing cross-linking ensures the formation of a sufficient three-dimensional network structure inside the coating, which is the structural foundation for obtaining good mechanical strength and resistance. In terms of chemical resistance, fully crosslinked coatings can effectively resist the erosion of chemical media such as acids, alkalis, and solvents, making them suitable for industrial anti-corrosion and chemical contact scenarios. Weather resistance ensures that the coating can maintain its appearance and performance for a long time under outdoor exposure conditions, delaying powdering, fading, and loss of gloss. The scratch resistance performance enhances the anti damage ability of the coating in daily use. The comprehensive performance of these properties makes CAPS modified water-based coatings comparable to traditional solvent based coatings. Adapt to efficient one-step process CAPS has high reactivity and fast reaction rate, and can be used to prepare modified curing agents by in-situ reaction with isocyanates through a "one-step method". The so-called 'one-step method' refers to obtaining modified products directly without complex post-processing steps during the preparation process. This technological feature greatly simplifies the production process, reduces equipment and labor input, and improves production efficiency and capacity. For industrial production, simplification of process steps means lower manufacturing costs and more stable product quality. At the same time, the shorter process flow also reduces the opportunity to introduce variables in the production process, which is beneficial for controlling batch consistency. The core value of CAPS in modified curing agents lies in its comprehensive ability to solve water dispersion problems, ensure storage stability, optimize coating performance, and adapt to efficient processes. Hubei Xindesheng Material Technology Co., Ltd. can provide CAPS products for water-based coating curing agent modification to meet the needs of coating formulation development. With the tightening of environmental regulations and the increasing demand for coating performance in downstream applications, the application prospects of CAPS in water-based coating formulation systems are worth paying attention to.

In the modification application of waterborne polyurethane curing agents, CAPS, as a key raw material, directly determines the modification effect and final coating performance through its quality indicators. From solubility to reaction activity, from activation period to film glossiness, water resistance, and even detailed requirements of physical morphology, customers' attention to CAPS products focuses on six core dimensions. These indicators collectively constitute the quality standards for evaluating whether CAPS is suitable for the curing agent modification system. Solubility: the primary prerequisite for application The solubility of CAPS in aqueous systems is the fundamental condition determining whether it can exert its modifying effect. If CAPS cannot be completely dissolved in the reaction system, the subsequent addition reaction with polyisocyanate cannot proceed uniformly. The quality of solubility directly affects the uniformity and basic quality of material mixing. Customers usually judge the solubility of CAPS by observing whether it can form a clear and transparent solution under formulation conditions. Incompletely dissolved CAPS can lead to unreacted particles in the modified product, affecting the dispersion effect of the curing agent and the appearance of the coating film. Therefore, solubility is the most direct basis for customers to judge during inspection. Reactivity: The key to control efficiency The reaction rate and efficiency of CAPS with polyisocyanate are directly related to the curing speed and production cycle. Too high a reaction activity may lead to excessive reaction in the system during the preparation process, affecting the operating window; too low a reaction activity will prolong the curing time and reduce production efficiency. Customers are concerned about whether the reaction activity of CAPS matches their own process conditions, and whether it can complete the modification reaction and achieve the expected conversion rate within the predetermined time. The balance of this indicator is an important factor in whether CAPS products can be stably applied to the production line. Activation period: window of operable time The activation period refers to the operable time window after the main agent and curing agent are mixed. An overly short activation period can affect the application process, as the system begins to crosslink and gel before the coating is complete; an overly long activation period may lead to production stagnation and affect efficiency. Customers are concerned about whether the cured agent system modified by CAPS can provide an activation period that matches the application method. Glossiness and Water Resistance: Manifestation of Coating Film Performance Glossiness focuses on the appearance of the cured coating film. Customers primarily assess the anti-yellowing performance of the coating film to ensure the color stability of the finished product during long-term use. Yellowing can affect the aesthetics of the coating film, especially in outdoor or light-colored coating applications. Water resistance evaluates the water and moisture resistance of the cured coating film, which is an important indicator for assessing the stability and service life of the product in humid environments. Physical form: Difference brought by fine powder Customers have specific requirements for the physical form of CAPS products - they need to be in the form of "flour-like" fine powder rather than crystalline form. The fine powder form can significantly enhance the dispersibility and dissolution rate in the system, reduce stirring energy consumption and time, avoid agglomeration, and thus ensure batch-to-batch stability and consistency in the quality of the final product. If the product is in crystalline or salt-like form, the dissolution rate is slower, and in industrial production, it may be necessary to extend the stirring time or increase the dispersion intensity, affecting production efficiency. The fine powder form makes weighing and feeding more convenient, is less prone to electrostatic agglomeration, and helps improve feeding accuracy. The quality control of CAPS products encompasses multiple testing items, including purity, pH value, loss on drying, metal ion content, and physical morphology. When using high-performance liquid chromatography to test purity, the target peak shape is clear, and the area of impurity peaks is controlled within the standard range. A weakly acidic environment is conducive to ensuring system stability, preventing polymer hydrolysis, and maintaining the optimal range of reaction activity. Strict moisture control avoids the failure of the curing agent or the formation of bubbles due to excessive moisture, which can affect the film-forming quality. The content of heavy metals must be strictly controlled to prevent them from catalyzing side reactions in the curing agent. The CAPS products produced by Hubei Xindesheng Material Technology Co., Ltd. are strictly quality-controlled in accordance with the above standards to meet the quality requirements of water-based coating customers for curing agent modified raw materials.

Accurate determination of lipase activity is of great significance for the diagnosis of pancreatic diseases in clinical biochemical testing. DGGR, as a highly specific lipase chromogenic substrate, provides a reliable solution for in vitro quantitative detection of lipase activity. Its molecular design is exquisite, and the enzymatic color development mechanism is clear. It has been widely used in biochemical analyzers and microplate detection platforms. Chemical Structure and Characteristics of DGGR Lipase Substrate The chemical name of DGGR is 1,2-di-O-moleyl-rac-glycerin-3- (6-methylisoquinoline glutarate), with a CAS number of 195833-46-6. The appearance is a red to dark red powder or solid, easily soluble in organic solvents such as DMSO and ethanol. The purity of the product is not less than 95%, and it needs to be stored in a dark, dry and sealed condition at minus 20 degrees Celsius. The shelf life is 24 months.The molecular structure of DGGR has been carefully designed, and its core functional groups can be specifically recognized by lipase. As a hydrophobic component, the laurel chain facilitates the dispersion and emulsification of substrates in aqueous systems, providing a suitable interface environment for enzymatic reactions. Glutaric acid bridging connects the chromophore with the glycerol backbone, forming the site of action for lipase. This structural combination enables DGGR to be specifically recognized and cleaved by lipase, while exhibiting good chemical stability. Two step enzymatic colorimetric mechanism The color reaction of DGGR follows a clear two-step process. The first step is specific hydrolysis. Lipase recognizes DGGR substrate molecules in the reaction system, hydrolyzes their ester bonds, and generates unstable dicarboxylic acid ester intermediates. The action of lipase has high substrate specificity, as it can cleave the ester bond between the laurel chain and the glycerol backbone, releasing intermediate products. The second step is spontaneous hydrolysis and chromophore release. The intermediate is unstable and undergoes spontaneous hydrolysis under reaction conditions, releasing methyl halides. Methyl halide is a chromophore with a blue purple color and strong light absorption at specific wavelengths. This hydrolysis process does not require the involvement of additional enzymes and can be carried out under reaction conditions of room temperature or 37 degrees Celsius. Detection principle and quantitative method After the color reaction is completed, quantitative detection is carried out by colorimetric method. Methyl halides exhibit characteristic absorption peaks at wavelengths of 570 nanometers or 580 nanometers. During the reaction process, as the lipase continuously hydrolyzes the DGGR substrate, methyl thiophanate is continuously released, and the absorbance of the reaction system gradually increases. Under fixed reaction conditions, the rate of increase in absorbance is directly proportional to the concentration of lipase activity in the sample. By comparing with standard samples or standard curves, the unit of lipase activity in the test sample can be calculated. Application scenarios and technological advantages DGGR substrates are suitable for various application scenarios, including the determination of lipase activity in clinical serum samples, the detection of lipase related indicators in food quality monitoring, and the evaluation of lipase activity in microbial samples. Its technological advantages are reflected in the following aspects: high detection sensitivity, which can meet the quantitative needs of low enzyme activity samples; Easy to operate, no need for complex sample pretreatment steps; Compatible with biochemical analyzers and microplate detection platforms, facilitating automated detection. For clinical diagnosis, lipase activity measurement is an important basis for the diagnosis of acute pancreatitis and the differential diagnosis of acute abdomen. The detection results provided by DGGR substrates have good reliability and stability, and can maintain linear response over a wide range of enzyme activities. DGGR substrates have application value in the field of lipase activity detection due to their clear color development mechanism, good substrate specificity, and wide application compatibility. The DGGR substrate produced by Hubei Xindesheng Material Technology Co., Ltd. has a purity of not less than 95%, good batch stability, and can meet the quality requirements of lipase substrates for clinical testing and scientific research experiments. If you need it, please contact me immediately!