Characteristics and structure of a soy protein isolate-lutein nanocomplex produced via high-pressure homogenization.

BACKGROUND: In recent years, nanocarriers for transporting active substances have attracted attention. This study was to explore the soy protein isolate (SPI) after high-pressure homogenization (HPH) (0, 30, 60, 90 and 120 MPa) as potential lutein carriers. RESULTS: The load amount (LA) and encapsulation efficiency (EE) of the SPI-lutein nanocomplexes at a homogenization pressure of 60 MPa were the highest (2.32 mg mL-1 and 92.85%, respectively), and the average particle size and ζ-potential of the SPI-lutein nanocomplexes were 192.1 nm and -30.06 mV, respectively. The DPPH (2,2-diphenyl-1-picrylhydrazyl) and hydroxyl-antioxidant activities of the complex increased from 12.4% and 23.3% to 52.7% and 61.07%, respectively, after the protein was treated with HPH. The surface hydrophobicity of the SPI and the SPI-lutein nanocomplexes increased with increasing homogenization pressure treatment. Fourier transform-infrared spectrophotometry analyses suggested that the homogenization treatments resulted in partial unfolding of the protein molecules, and the addition of lutein can also lead to the change of protein secondary structure. The fluorescence emission of SPI was quenched by lutein through the static quenching mechanism. Fluorescence experiments revealed that SPI and lutein had the strongest binding ability through hydrophobic interaction at a homogenization pressure of 60 MPa. CONCLUSION: After HPH, the combination of SPI and lutein was beneficial, and the stability of lutein also improved after the combination. This study is conducive to expanding the application of soybean protein in the food industry. © 2022 Society of Chemical Industry.

Extraperitoneal pelvic packing versus angiographic embolization for hemodynamically unstable pelvic fractures: a retrospective single-center analysis.

OBJECTIVE: To retrospectively analyze the clinical data and treatment procedures of angiographic embolization (AE) and extraperitoneal pelvic packing (EPP) for traumatic pelvic fractures in our center for the purpose of providing recommendations on the selection of treatment protocols. METHODS: We analyzed 110 patients with traumatic pelvic fractures treated with AE and EPP from January 2015 to May 2023. The patients were divided into the AE group (69 men, 41 women) and the EPP group (20 men, 12 women). The primary outcomes were the mortality rate and incidence of complications. RESULTS: The mortality rate was slightly lower in the AE than EPP group (7.3% vs. 9.4%). The overall blood transfusion volume was lower and the length of hospital stay was shorter in the AE than EPP group (7.79 ± 12.04 vs. 9.14 ± 14.21 units and 20.48 ± 11.32 vs. 22.14 ± 10.47 days). CONCLUSIONS: Both AE and EPP have good treatment effects. AE is preferred for patients in stable condition with severe hemorrhage. This study suggests that EPP should be the primary treatment and that AE should serve as a complementary treatment for critical patients.