Utility of Large Diameter Visible Trephine in Percutaneous Endoscopic Lumbar Interbody Fusion: A Technical Report.

PURPOSE: In this study, a large diameter visible trephine was designed and used in percutaneous endoscopic lumbar interbody fusion to increase endoscopic bone decompression efficiency. Large diameter visible trephine-related technical notes and preliminary clinical experience are described. METHODS: A large diameter visible trephine was designed with normal diameter visible trephine as template. A total of 38 patients with lumbar degenerative diseases who underwent single-level percutaneous endoscopic lumbar interbody fusion with large or normal diameter visible trephine were included into a retrospective study. Operation time, bone decompression time, blood loss, intraoperative fluoroscopy, bone decompression fluoroscopy, and dura or nerve injury cases were recorded and analyzed statistically. Visual Analog Scale (VAS) scores and Oswestry Disability Index (ODI) were used to analyze the clinical outcomes of the 2 groups. RESULTS: The baseline data of the 2 groups were statistically similar. There was no significant difference in postoperative VAS and ODI scores between the 2 groups. Operation time and bone decompression time of large diameter visible trephine group were significantly shorter than that of normal diameter visible trephine group (P < 0.05). Intraoperative fluoroscopy times and bone decompression fluoroscopy times of large diameter visible trephine group were significantly more than that of normal diameter visible trephine group (P < 0.05). Blood loss of the 2 groups were not statistically different. There were no dura or nerve injury cases in the 2 groups. CONCLUSIONS: For percutaneous endoscopic lumbar interbody fusion, the large diameter visible trephine is a safe and efficient endoscopic bone decompression tool under fluoroscopic guidance.

Band Structure Engineering within Two-Dimensional Borocarbonitride Nanosheets for Surface-Enhanced Raman Scattering.

Herein, with two-dimensional (2D) borocarbonitride (BCN) as a metal- and plasmon-free surface-enhanced Raman scattering (SERS) platform, we demonstrate a band structure engineering strategy to facilitate the charge transfer process for an enhanced SERS response. Especially, when the conduction band of the BCN substrate is tuned to align with the LUMO of the target molecule, remarkable SERS performance is achieved, ascribed to the borrowing effect from the vibronic coupling of resonances through the Herzberg-Teller coupling term. Meanwhile, fluorescence quenching is achieved due to the efficient charge transfer between the BCN substrate and target molecule. Consequently, BCN can accurately detect 20 kinds of trace chemical and bioactive analytes. Moreover, BCN exhibits excellent thermal and chemical stability, which can not only withstand high-temperature (300 °C) heating in the air but also resist long-term corrosion in harsh acid (pH = 0, HCl) and base (pH = 14, NaOH). This work provides new insight into band structure engineering in promoting the SERS performance of plasmon- and metal-free semiconductor substrates.

Relationships between Perceived Discrimination and Suicidal Ideation among Impoverished Chinese College Students: The Mediating Roles of Social Support and Loneliness.

We explored the mediating effect of social support and loneliness in the relationships between perceived discrimination and suicidal ideation among impoverished Chinese college students. Using the convenience cluster sampling method, we chose a total of 964 impoverished college students from a central province of China. Students completed the cross-sectional survey using the Perceived Discrimination Questionnaire, the Social Support Rating Scale, the University of California at Los Angeles Loneliness Scale, and the Beck Scale for Suicidal Ideation. Correlation analysis and structural equation modeling analysis were conducted to clarify the relationships between study variables. Correlation analysis showed that perceived discrimination, loneliness, and suicidal ideation were positively correlated with each other; social support was negatively correlated with perceived discrimination, loneliness, and suicidal ideation. In addition, structural equation modeling analysis indicated that perceived discrimination had a direct positive effect on suicidal ideation; social support and loneliness partially mediated the relationship between perceived discrimination and suicidal ideation. Specifically, perceived discrimination was positively associated with suicidal ideation via social support and loneliness separately, and had a serial association through both social support and loneliness. Thus, perceived discrimination may have influenced suicidal ideation through both social support and loneliness.

Longitudinal relationships between bullying and prosocial behavior: The mediating roles of trauma-related guilt and shame.

The present study examined the relationships between bullying, trauma-related guilt, trauma-related shame, and prosocial behaviors. We investigated 1,322 college students using a longitudinal approach to explore the internal mechanism between bullying, prosocial behaviors, and the probable mediating effects of trauma-related guilt and shame. The results suggested that bullying negatively predicted prosocial behaviors and that trauma-related guilt played a positive mediating role. In contrast, trauma-related shame played a negative mediating role in the relationship between bullying and prosocial behaviors. These findings indicated that trauma-related guilt and shame played adaptive and maladaptive roles after bullying victimization, which also provided a theoretical basis for the relevant intervention.

Recent Advances in Plasmon-Promoted Organic Transformations Using Silver-Based Catalysts.

Plasmonics has emerged as a promising methodology to promote chemical reactions and has become a field of intense research effort. Ag nanoparticles (NPs) as plasmonic catalysts have been extensively studied because of their remarkable optical properties. This review analyzes the emergence and development of localized surface plasmon resonance (LSPR) in organic chemistry, mainly focusing on the discovery of novel reactions with new mechanisms on Ag NPs. Initially, the basics of LSPR and LSPR-promoted photocatalytic mechanisms are illustrated. Then, the recent advances in plasmonic nanosilver-mediated photocatalysis in organic transformations are highlighted with an emphasis on the related reaction mechanisms. Finally, a proper perspective on the remaining challenges and future directions in the field of LSPR-promoted organic transformations is proposed.