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Regenerative Injection Therapy on Tendon Healing: Dextrose Prolotherapy versus Platelet-Rich Plasma
Jungmin Lim,Won-Jae Lee,Min-Soo Seo,Seong Mok Jeong,Sae-Kwang Ku,Youngsam Kwon,Sungho Yun 한국임상수의학회 2023 한국임상수의학회지 Vol.40 No.2
The tendon is a dense connective tissue that connects muscle to bone and plays an essential role in joint motion. The injured tendon heals slowly owing to its low cellularity and vascularity. This study aimed to evaluate and compare the effects of regenerative injection therapy (RIT), 20 % dextrose prolotherapy (DP), and platelet-rich plasma (PRP) injections that can promote tendon healing. Twenty-one New Zealand white rabbits were divided into the control, DP, and PRP treatment groups. The superficial digital flexor tendon (SDFT) of the right hindlimb of each rabbit was used. A round defect of 2 mm was induced. Approximately 0.2 mL of 20% dextrose and autologous PRP were injected into the proximal and distal ends of the SDFT mass. Radiographic and ultrasonographic examination and cross-sectional area (CSA) calculations were performed pre-operatively and at 2, 4, and 8 weeks. The SDFT of both limbs was transected for biomechanical and histomorphometric evaluations. The SDFT of the left limb was transected for intact control. Semi-quantitative analysis was performed to evaluate the histomorphometric properties. Additional analysis was performed using H&E, Masson’s trichrome, and immunohistochemical staining. The biomechanical evaluation showed that the treatment groups had higher tensile strength compared to the defect control group, while the PRP group had higher tensile strength than the DP group. On histological examination, the treatment groups appeared to be relatively closer to the remodeling phase of the healing process than the defect control group; the characteristics of the PRP group were closer to the remodeling phase than those of the DP group. The ultrasonographic examination showed different tendencies. Increased values in the CSA were observed during the early period in the treatment groups. This study suggests that PRP and DP can promote the healing of tendon injury, and these effects were superior with PRP than that with DP.
Luo Zhenxing(Zhenxing Luo),Zhao Yanwei(Yanwei Zhao),Lim Jungmin(Jungmin Lim) 한국자료분석학회 2023 Journal of the Korean Data Analysis Society Vol.25 No.3
The central aim of this paper is to provide a comprehensive analysis of the impact of population aging on carbon emissions in China. In order to attain a deeper comprehension of this effect, this study investigates the non-linear relationship between population aging and carbon emissions through empirical analysis of 30 provinces and regions in China from 1997 to 2019 using a panel threshold model. Our primary research findings indicate that the correlation between population aging and carbon emissions demonstrates nonlinearity. Population aging has had an inhibitory effect on carbon emissions; however, as the aging population continues to increase, its effect on suppressing carbon emissions will weaken. Moreover, we have also uncovered non-linear relationships between energy intensity, per capita GDP, industrial structure, and carbon emissions. Notably, despite rapid growth in total fossil energy consumption, energy intensity has shown a decreasing trend in China, which has mitigated the upsurge in carbon emissions attributed to fluctuations in energy intensity. The positive correlation between GDP per capita and carbon emissions is evident, but there is little variation observed across different threshold levels. Finally, the relationship between industrial structure and carbon emissions is considerably intricate, our results show that a U-shaped curvilinear relationship exists between the two variables.
Lim, Changjin,Ahn, Jungmin,Sim, Jaehoon,Yun, Hwayoung,Hur, Joonseong,An, Hongchan,Jang, Jaebong,Lee, Seungbeom,Suh, Young-Ger The Royal Society of Chemistry 2018 Chemical communications Vol.54 No.5
<P>The enantioselective total synthesis of (+)-brasilenyne has been accomplished. The key features of the synthesis include the convergent preparation of a highly functionalized endocyclization precursor <I>via</I> selective epoxide opening, the construction of an oxonene skeleton through perfect regioselective Pd(0)-catalyzed endocyclization, and the installation of a 1,3-<I>cis</I>,<I>cis</I>-diene unit <I>via</I> a decarboxylative photophenylselenylation and site-selective selenoxide elimination sequence.</P>