Publications by authors named "Guo-Song Zhang"

Continuous manufacturing, as an innovative pharmaceutical production model, offers advantages such as high production efficiency and ease of control compared to traditional batch production, aligning with the future trend of drug production moving toward greater efficiency and intelligence. However, the development of continuous manufacturing technology in wet granulation has been slow. On one hand, this is closely related to its high technical complexity, substantial equipment investment costs, and stringent process control requirements.

View Article and Find Full Text PDF

To study the heavy metal accumulation and its impact on insect exterior and chromosome morphology, and reveal the molecular mechanism of insects adapting to long-term heavy metal compound pollution habitats, this study, in the Diaojiang river basin, which has been polluted by heavy metals(HMs) for nearly a thousand years, two Eucriotettix oculatus populations was collected from mining and non-mining areas. It was found that the contents of 7 heavy metals (As, Cd, Pb, Zn, Cu, Sn, Sb) in E. oculatus of the mining area were higher than that in the non-mining 1-11 times.

View Article and Find Full Text PDF

This study explores the structures and chemical bonding properties of TaSi̅ and TaSi̅ clusters by employing anion photoelectron spectroscopy and theoretical computations. Utilizing CALYPSO and ABCluster programs for initial structure prediction, B3LYP hybrid functional for optimization, and CCSD(T)/def2-TZVPPD level for energy calculations, the research identifies the most stable isomers of these clusters. Key findings include the identification of two coexisting low-energy isomers for TaSi̅, exhibiting Ta-endohedral fullerene-like cage structures, and the lowest-energy structures of TaSi̅ and TaSi̅ anions can be considered as derived from the TaSi̅ superatom cluster.

View Article and Find Full Text PDF

Solid base catalysts are widely used in the chemical industry owing to their advantages of environmental friendliness and easy separation. However, their application is limited by basic site aggregation and poor stability. In this study, we report the preparation of magnesium (Mg) single-atom catalysts with high activity and stability by a sublimation-trapping strategy.

View Article and Find Full Text PDF

Background: Ligustilide (LIG) and n-butylphthalide (NBP) have neuroprotective effects in cerebral ischemia; however, their roles in gliomas are not well-known.This study aimed to explore the anti-glioma effects of LIG and NBP individually and the synergistic effects of temozolomide (TMZ) via the PI3K/Akt Signaling Pathway.

Materials And Methods: Cytotoxicity of LIG and NBP alone and in combination with TMZ in U251 cells was determined using the CCk-8.

View Article and Find Full Text PDF

The structures and bonding characteristics of TaSi̅ clusters are investigated using anion photoelectron spectroscopy and quantum chemical calculations. The vertical detachment energy of the TaSi̅ anion is measured to be 2.00 ± 0.

View Article and Find Full Text PDF
Article Synopsis
  • Solid superbases provide effective catalysis under mild conditions, but face issues with aggregation and stability during recycling.
  • A new type of solid superbase, created from potassium single atoms (SAs) using a two-step redox process, has been developed to overcome these challenges.
  • The K/G hybrid demonstrates superior catalytic performance and stability in transesterification reactions, attributed to its unique superbasicity and the high dispersion of basic sites.
View Article and Find Full Text PDF

Ethnopharmacological Relevance: The existence of the blood-brain barrier/blood tumor barrier (BBB/BTB) severely restricts the effectiveness of anti-tumor drugs, thus glioma is still an incurable disease with a high fatality rate. Chuanxiong (Ligusticum chuanxiong Hort., Umbelliferae) was used as a messenger drug to increase the distribution of drugs in brain tissue, and its application in Chinese herbal formula for treating glioma was also the highest.

View Article and Find Full Text PDF
Article Synopsis
  • Ibuprofen (IBU) has poor gastrointestinal absorption due to low solubility, prompting researchers to create a thermosensitive gel with ibuprofen-loaded solid lipid nanoparticles (IBU-SLN-ISG) for better dissolution and bioavailability through rectal delivery.
  • The study optimized the IBU-SLN formulation using a design approach and characterized its physicochemical properties, revealing successful drug encapsulation and a favorable release profile with minimal rectal irritation.
  • Tests showed that the IBU-SLN-ISG significantly improved IBU absorption and retention in the rectum, indicating its potential for further development as a more effective delivery system.
View Article and Find Full Text PDF

Solid strong bases with an ordered pore structure (OPS-SSBs) have attracted much attention because of their high catalytic activity and shape selectivity as heterogeneous catalysts in various reactions. Nevertheless, high temperatures are required to fabricate OPS-SSBs by using traditional methods. Herein, we report for the first time that the coordination solvents affect basicity generation in metal-organic frameworks (MOFs) greatly and that strong basicity can be formed at comparatively low temperatures.

View Article and Find Full Text PDF

This study aims to establish a method for the determination of the concentration of five main components of phthalide target areas of Chaxiong(CPTA) and its inclusion of β-CD in the plasma of rats, and determine the pharmacokinetic parameters, absolute bioavailability and relative bioavailability of CPTA/β-CD inclusion compound in vivo. The plasma concentrations of senkyunolide A, N-butylphthalide, new osthol lactone, Z-ligustilide and butenyl phthalide were determined with UPLC-MS/MS. The content determination was conducted at the chromatographic conditions as follows: Shim-pack GIST C_(18)-AQ HP column(2.

View Article and Find Full Text PDF

Ethnopharmacological Relevance: Da Chuan Xiong Decoction Compound preparation (DCXDCP) is a classic TCM formula of an aqueous extract made from Chuanxiong Rhizoma (Ligusticum chuanxiong Hort., umbelliferae) and Tianma Rhizoma (Gastrodia elata Bl., Orchidaceae).

View Article and Find Full Text PDF

The aim of this study was to develop and optimise a saikosaponin a and saikosaponin d compound liposome (SSa-SSd-Lip) formulation with reduced hemolysis and enhanced bioavailability. A screening experiment was done with Plackett-Burman design, and response surface methodology of five factors (EPC/SSa-SSd ratio, EPC/Chol ratio, water temperature, pH of PBS, and ultrasound time) was employed to optimise the mean diameter, entrapment efficiency of SSa and SSd, and the reduction of hemolysis for SSa-SSd-Lip. Under the optimal process conditions (EPC/SSa-SSd ratio, EPC/Chol ratio, water temperature and pH of PBS were 26.

View Article and Find Full Text PDF
Article Synopsis
  • The study aimed to find the solubility of pulchinenosiden D in various solvents and measure its partition coefficients using a shaking flask method and HPLC analysis.
  • The results showed that pulchinenosiden D has higher solubility in methanol (255.89 g/L) and lower solubility in acetonitrile (0.20 g/L), with solubility increasing as the pH of the buffer solution rises.
  • The findings suggest that under gastrointestinal conditions, pulchinenosiden D is likely to be well-absorbed despite its low water solubility, indicating that improving its dissolution rate could enhance its bioavailability.
View Article and Find Full Text PDF

The free membrane of Eudragit L100/S100 which is pH-sensitive, colon-specific was prepared by plane casting films. The film humidity, species and amount of plasticizers, the ratio of membrane material was investigated. The rate of membrane permeability and mechanical properties were used as indicators of orthogonal experiment, and its related properties were studied.

View Article and Find Full Text PDF