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The interaction between water-soluble CdS and gelatin 5n aqueous solution was explored using fluorescence,infrared (IR)and UV-Vis spectra at pH 12.0 and different temperatures.Results show that the formed complex had a strong ability to quench the fluorescence launched from gelatin.The fluorescence quenching data were analvzed according to Lineweave-Burk double-reciprocal equation and the gelatin had reacted with CdS to form a complex.This kind of static fluorescence quenching goes with non-radiation energy transfer happening within single molecule According to Lineweave-Burk equation,K(285 K:1.07×10~4 L/mol;292 K:9 69×10~3 L/mol;299 K:8.06×10~3 L/mol),the formation constants of the compound at different temperatures and the thermodynamic parameters(△H=-14.18 kJ/mol;△G=-21.98/-22.28/-22.36 kJ/mol;△S=27.36/27.74/27.36 J/K·mol) at certain temperatures were obtained,indicating that the binding force between them is mainly the static in nature.The binding locality was an area of 4.09 nm away from tryptophan residue in gelatin based on F(o)rster's non-radiation energy transfer mechanism.The results provide information for exploring the chemical mechanism of interaction between nanoparticle and this kind of biological macromolecule.

OBJECTIVETo explore the clinical effect of using dorsal two wing-shaped flap to reconstruct finger web for treatment of congenital syndactyly.

METHODSThis technique has been used in 19 children with congenital syndactyly. At the dorsum, a flap with V-shaped tip and two wing-shaped pedicle were designed and was just sewed up with an anchor-shaped incision at the palm. The web was primarily reconstructed without skin graft at base of fingers. Distal end of fingers were separated by using serrated flap and were closed after removal of fatty tissue. At some cases with tight skin connection. The defect area at lateral and distal end of fingers was closed by small pieces of skin graft.

RESULTSAll the webs were reconstructed primarily without skin graft at the base of fingers. 7 cases with tight skin connection had small pieces of skin graft at lateral and distal end of fingers. Primary healing was achieved in all cases. After 1 to 6 months of follow-up, both the appearance and function were satisfactory without conspicuous scar. The reconstructed finger webs were in normal depth and width.

CONCLUSIONSPrimary web space can be achieved by dorsal two wing-shaped flap without skin graft at base of fingers. It is one of the best choices for treatment of congenital syndactyly.

Adipose Tissue ; surgery ; Child ; Cicatrix ; Dermatologic Surgical Procedures ; methods ; Fingers ; surgery ; Humans ; Skin Transplantation ; Surgical Flaps ; transplantation ; Syndactyly ; surgery ; Wound Healing

OBJECTIVETo study the content of magnoflorine in main species of Epimedii Herba.

METHODUltrasonic extraction, HPLC analysis.

RESULTThe content of magnoflorine of Epimedium leaves range between 0.0029% and 1.688%.

CONCLUSIONThe content of magnoflorine of Epimedium show large differences between species but relatively stable within the species, E. koreanum Nakai is the highest one and E. brevicornu is the lowest.

Aporphines ; analysis ; Chromatography, High Pressure Liquid ; methods ; Drugs, Chinese Herbal ; analysis ; Epimedium ; chemistry

Objective:To compare short-term clinical outcomes and patient satisfaction between robotic-assisted total hip arthroplasty (THA) and conventional THA.Methods:Patient data of unilateral primary THA with the same prosthesis by the same operator due to osteoarthritis, osteonecrosis of the femoral head, and other diseases in Peking University Third Hospital from September 2019 to February 2022 was retrospectively analyzed. Patients were divided into robot-assisted THA group and conventional THA group according to surgical methods. The preoperative general data, operation time, intraoperative complications and other intraoperative data were collected. Anteroposterior X-ray of pelvis and cross-table X-ray of hip were taken. Main outcome measures consisted of total blood loss, blood transfusion rate, hospitalization stay, postoperative complications, and the inclination and anteversion angle of the acetabular cup, while the dislocation rate outside the Lewinnek and Callanan safe zone was also analyzed. Other outcomes measures included visual analogue scale, Harris score, quality of life score (QOL) and satisfaction score.Results:There was no significant difference in gender, age, height, weight, body mass index (BMI), operation side, preoperative blood volume and Harris score between the two groups ( P>0.05); Loosening of positioning screws occurred in 2 patients due to osteoporosis in robot-assisted THA group, so conventional THA was performed. Therefore, 84 cases in robot-assisted THA group and 87 cases in conventional THA group were enrolled in this study at last. There was no significant difference in follow-up time between conventional THA group and robot-assisted THA group (19.7±6.8 months vs. 18.6±5.4 months, t=1.16, P=0.249); The operation time of robot-assisted THA group was longer than that of conventional THA group (106.99±31.91 min vs. 73.79±29.48 min, t=7.07, P<0.001), but there was no significant difference in hospitalization stay between conventional THA group and robot-assisted THA group (6.40±2.40 d vs. 6.49±1.95 d, t=0.26, P=0.796). There was also no significant difference in total blood loss and blood transfusion rate between the two groups ( P>0.05). There was no significant difference in inclination angle (38.79°±6.93° vs. 39.41°±3.01°, t=0.58, P=0.449) and anteversion angle (14.81°±6.49° vs. 13.33°±4.32°, t=3.06, P=0.082) between conventional THA group and robot-assisted THA group, while the percentage in Lewinnek safe zone (96.4% vs. 73.6%, χ 2=15.60, P<0.001) and Callanan safe zone (92.9% vs. 65.5%, χ 2=17.61, P<0.001) was significantly higher in conventional THA than that of robot-assisted THA. There were no significant differences in postoperative VAS, Harris score and QOL score between the two groups ( P>0.05), but the excellent and good rate of Harris score of conventional THA group was lower than that of robot-assisted THA group (83.91% vs. 95.24%, χ 2=5.83, P=0.016); The overall satisfaction of patients in robot-assisted THA group was better than that in conventional THA group ( Z=-3.47, P=0.001), and 95.2% (80/84) of patients in robot-assisted THA group were very satisfied, which was higher than that in conventional THA group (75.86%, 66/87). The satisfaction of patients in robot-assisted THA group on pain relief ( Z=-2.44, P=0.015) and improvement of leisure activity ( Z=-2.12, P=0.034) was better than that in conventional THA group, but there was no significant difference in the satisfaction of ability of doing house work between the two groups ( Z=-0.49, P=0.626). Conclusion:Compared with conventional THA, robot-assisted THA has longer operation time but better short-term clinical outcomes and higher patient satisfaction after surgery.

BACKGROUNDSeveral small sample-size observational studies evaluated the association of plasma brain natriuretic peptide (BNP) or N-terminal pro-brain natriuretic peptide (NT-proBNP) with atrial fibrillation (AF), but the results were contradictory. We aimed to perform a meta-analysis of relevant studies to evaluate the availability of this association.

METHODSWe performed an extensive literature search on PubMed, Web of Science (WOS) and the Cochrane Library databases. Pooled standardized mean difference (SMD) and 95% confidence interval (CI) were calculated to assess the strength of association using random effects models. We performed sensitivity and subgroup analyses to explore the potential sources of heterogeneity. We also estimated publication biases. Statistical analyses were performed using the STATA 12.0 software.

RESULTSA total of 11 studies including 777 cases and 870 controls were finally analyzed. Overall, the brain natriuretic peptide/N-terminal pro-brain natriuretic peptide levels were higher in atrial fibrillation patients than controls without atrial fibrillation.

RESULTSshowed that the SMD in the natriuretic peptide levels between cases and controls was 2.68 units (95% CI 1.76 to 3.60); test for overall effect z-score = 5.7 (P < 0.001). There was significant heterogeneity between individual studies (I(2) = 97.8%; P < 0.001). Further analysis revealed that differences in the assay of natriuretic peptide possibly account for this heterogeneity.

CONCLUSIONSIncreased BNP/NT-proBNP levels were associated with the presence of atrial fibrillation. This finding indicates that BNP/NT-proBNP may prove to be a biomarker of an underlying predisposition to AF.

Atrial Fibrillation ; blood ; Biomarkers ; blood ; Humans ; Natriuretic Peptide, Brain ; blood ; Peptide Fragments ; blood

OBJECTIVE: To assess the therapeutic effect of hyaluronate acid (HA) injection through the subpatellar route for treatment of chondromalacia patellae (CP). METHODS: Eighty-eight patients with the diagnosis of CP were enrolled in this prospective study, including 38 with early CP (CP group) and 50 with advanced CP (patellofemoral arthritis group) diagnosed based on image presentations. All the patients received intra-articular HA injections through a subpatellar route once a week for 5 consecutive weeks. The primary outcome measures included WOMAC index scores and Lequesne scores before and at 4, 12, 26 and 52 weeks after the injections. The secondary outcome measures included the 30-m walking time and stair ascending and descending time (one floor) before and at 1, 2, 3, and 4 weeks after the injections. RESULTS: In both groups the patients showed significantly decreased WOMAC scores and Lequesne scores at 4, 12, 26 and 52 weeks after HA injections as compared with the baseline scores (all < 0.01). No significant difference was found between the two groups in WOMAC scores and Lequesne scores at 4 or 12 weeks after the injections (both >0.05). The WOMAC scores and Lequesne scores at 26 and 52 weeks after the injections were significantly higher in patellofemoral arthritis group than in CP group (both < 0.05). In both groups, the 30-m walking time and the stair ascending and descending time decreased significantly at 1, 2, 3, and 4 weeks after HA injections (all < 0.05) without significant differences between the two groups (all >0.05). CONCLUSIONS HA injection through the subpatellar route is effective for treatment of CP. HA injection produces better long-term efficacy for treatment of early CP than for advanced CP where patellofemoral arthritis occurs.
Chondromalacia Patellae ; Follow-Up Studies ; Humans ; Hyaluronic Acid ; Injections, Intra-Articular ; Osteoarthritis, Knee ; Pain Measurement ; Prospective Studies ; Severity of Illness Index ; Treatment Outcome