BACKGROUND Abdominal cocoon syndrome(ACS)represents a category within sclerosing encapsulating peritonitis,characterized by the encapsulation of internal organs with a fibrous,cocoon-like membrane of unknown origin,re...BACKGROUND Abdominal cocoon syndrome(ACS)represents a category within sclerosing encapsulating peritonitis,characterized by the encapsulation of internal organs with a fibrous,cocoon-like membrane of unknown origin,resulting in bowel obstruction and ischemia.Diagnosing this condition before surgery poses a cha-llenge,often requiring confirmation during laparotomy.In this context,we depict three instances of ACS:One linked to intestinal obstruction,the second exclu-sively manifesting as intestinal ischemia without any obstruction,and the final case involving a discrepancy between the radiologist and the surgeon.CASE SUMMARY Three male patients,aged 53,58,and 61 originating from Northern Thailand,arrived at our medical facility complaining of abdominal pain without any prior surgeries.Their vital signs remained stable during the assessment.The diagnosis of abdominal cocoon was confirmed through abdominal computed tomography(CT)before surgery.In the first case,the CT scan revealed capsules around the small bowel loops,showing no enhancement,along with mesenteric congestion affecting both small and large bowel loops,without a clear obstruction.The second case showed intestinal obstruction due to an encapsulated capsule on the CT scan.In the final case,a patient presented with recurring abdominal pain.Initially,the radiologist suspected enteritis as the cause after the CT scan.However,a detailed review led the surgeon to suspect encapsulating peritoneal sclerosis(ACS)and subsequently perform surgery.The surgical procedure involved complete removal of the encapsulating structure,resection of a portion of the small bowel,and end-to-end anastomosis.No complications occurred during surgery,and the patients had a smooth recovery after surgery,eventually discharged in good health.The histopathological examination of the fibrous membrane(cocoon)across all cases consistently revealed the presence of fibro-collagenous tissue,without any indications of malignancy.CONCLUSION Individuals diagnosed with abdominal cocoons commonly manifest vague symptoms of abdominal discomfort.An elevated degree of clinical suspicion,combined with the application of appropriate radiological evaluations,markedly improves the probability of identifying the abdominal cocoon before surgical intervention.In cases of complete bowel obstruction or ischemia,the established norm is the comprehensive removal of the peritoneal sac as part of standard care.Resection with intestinal anastomosis is advised solely when ischemia and gangrene have been confirmed.展开更多
Potassium ion batteries(PIBs)are emerging as potential next-generation energy storage systems on account of their low cost and high theoretical energy density.Nevertheless,they also face challenges of low specific cap...Potassium ion batteries(PIBs)are emerging as potential next-generation energy storage systems on account of their low cost and high theoretical energy density.Nevertheless,they also face challenges of low specific capacity and suboptimal cycling stability.Herein,we synthesize a cocoon-like P3-type K_(0.5)Mn_(0.7)Ni_(0.3)O_(2)(KMNO)cathode material by a self-template method.The KMNO cocoons possess a hierarchical layered architecture composed of nanoparticle stacking,which can accelerate the transport kinetics of potassium ions,mitigate the stress caused by K^(+)intercalation and deintercalation,and improve structural stability.In addition,Ni can not only alleviate the Jahn-Teller distortion and suppress the phase transition to stabilize the structure,but also act as an electrochemically active element,providing the capacity of two electrons from Ni2+to Ni4+.Combining the advantages of structure and nickel substitution,the P3-type KMNO cocoons are used for electrochemical performance testing of PIB cathodes,delivering an excellent rate capability of 57.1 m A h g^(-1)at 500 m A g^(-1)and a remarkable cycling stability of 77.0%over 300 cycles at 100 m A g^(-1).Impressively,the KMNO cocoons//pitch-derived soft carbon assembled full battery exhibits superior electrochemical performance with a reversible capacity of 79.7 m A h g^(-1)at 50 m A g^(-1).Moreover,ex-situ XRD also further reveals a solid solution phase reaction with a volume change of only 1.46%.This work furnishes a suitable approach to fabricating highperformance layered oxide cathodes for PIBs with outstanding cycling stability and rate capability.展开更多
社交商务作为数字经济的重要组成,拥有巨大的市场潜力,但也面临着平台发展模式同质化等问题,导致形成固化用户的自我认识和网络信息行为的信息茧房。由于社交媒体的多样性、群体关系复杂性,茧房效应与社交商务结合的研究有待进一步挖掘...社交商务作为数字经济的重要组成,拥有巨大的市场潜力,但也面临着平台发展模式同质化等问题,导致形成固化用户的自我认识和网络信息行为的信息茧房。由于社交媒体的多样性、群体关系复杂性,茧房效应与社交商务结合的研究有待进一步挖掘。通过中国知网和Web of Science核心集,截至2023年3月31日,检索并筛选获取606篇相关文献,运用社会网络分析方法进行分析。其中300篇中文文献重点探讨个性化推荐算法对信息茧房形成的影响,306篇英文文献更多关注信息茧房与平台和用户行为之间的关系。基于信息茧房相关概念的研究明确其内涵和特征,根据平台、算法和用户3个维度的作用机制分析构建信息同质化视角下信息茧房形成机制框架,即社交平台内外部信息趋同导致了用户选择同质化、平台内容同质化以及用户群体同质化问题,并以正反馈的形式不断加强,最终形成信息茧房。由此,基于同质化视角,分别从政府、平台和用户3个主体层面提出社交商务平台应对信息茧房的策略。展开更多
文摘BACKGROUND Abdominal cocoon syndrome(ACS)represents a category within sclerosing encapsulating peritonitis,characterized by the encapsulation of internal organs with a fibrous,cocoon-like membrane of unknown origin,resulting in bowel obstruction and ischemia.Diagnosing this condition before surgery poses a cha-llenge,often requiring confirmation during laparotomy.In this context,we depict three instances of ACS:One linked to intestinal obstruction,the second exclu-sively manifesting as intestinal ischemia without any obstruction,and the final case involving a discrepancy between the radiologist and the surgeon.CASE SUMMARY Three male patients,aged 53,58,and 61 originating from Northern Thailand,arrived at our medical facility complaining of abdominal pain without any prior surgeries.Their vital signs remained stable during the assessment.The diagnosis of abdominal cocoon was confirmed through abdominal computed tomography(CT)before surgery.In the first case,the CT scan revealed capsules around the small bowel loops,showing no enhancement,along with mesenteric congestion affecting both small and large bowel loops,without a clear obstruction.The second case showed intestinal obstruction due to an encapsulated capsule on the CT scan.In the final case,a patient presented with recurring abdominal pain.Initially,the radiologist suspected enteritis as the cause after the CT scan.However,a detailed review led the surgeon to suspect encapsulating peritoneal sclerosis(ACS)and subsequently perform surgery.The surgical procedure involved complete removal of the encapsulating structure,resection of a portion of the small bowel,and end-to-end anastomosis.No complications occurred during surgery,and the patients had a smooth recovery after surgery,eventually discharged in good health.The histopathological examination of the fibrous membrane(cocoon)across all cases consistently revealed the presence of fibro-collagenous tissue,without any indications of malignancy.CONCLUSION Individuals diagnosed with abdominal cocoons commonly manifest vague symptoms of abdominal discomfort.An elevated degree of clinical suspicion,combined with the application of appropriate radiological evaluations,markedly improves the probability of identifying the abdominal cocoon before surgical intervention.In cases of complete bowel obstruction or ischemia,the established norm is the comprehensive removal of the peritoneal sac as part of standard care.Resection with intestinal anastomosis is advised solely when ischemia and gangrene have been confirmed.
基金supported by the National Natural Science Foundation of China(22179063)。
文摘Potassium ion batteries(PIBs)are emerging as potential next-generation energy storage systems on account of their low cost and high theoretical energy density.Nevertheless,they also face challenges of low specific capacity and suboptimal cycling stability.Herein,we synthesize a cocoon-like P3-type K_(0.5)Mn_(0.7)Ni_(0.3)O_(2)(KMNO)cathode material by a self-template method.The KMNO cocoons possess a hierarchical layered architecture composed of nanoparticle stacking,which can accelerate the transport kinetics of potassium ions,mitigate the stress caused by K^(+)intercalation and deintercalation,and improve structural stability.In addition,Ni can not only alleviate the Jahn-Teller distortion and suppress the phase transition to stabilize the structure,but also act as an electrochemically active element,providing the capacity of two electrons from Ni2+to Ni4+.Combining the advantages of structure and nickel substitution,the P3-type KMNO cocoons are used for electrochemical performance testing of PIB cathodes,delivering an excellent rate capability of 57.1 m A h g^(-1)at 500 m A g^(-1)and a remarkable cycling stability of 77.0%over 300 cycles at 100 m A g^(-1).Impressively,the KMNO cocoons//pitch-derived soft carbon assembled full battery exhibits superior electrochemical performance with a reversible capacity of 79.7 m A h g^(-1)at 50 m A g^(-1).Moreover,ex-situ XRD also further reveals a solid solution phase reaction with a volume change of only 1.46%.This work furnishes a suitable approach to fabricating highperformance layered oxide cathodes for PIBs with outstanding cycling stability and rate capability.
文摘社交商务作为数字经济的重要组成,拥有巨大的市场潜力,但也面临着平台发展模式同质化等问题,导致形成固化用户的自我认识和网络信息行为的信息茧房。由于社交媒体的多样性、群体关系复杂性,茧房效应与社交商务结合的研究有待进一步挖掘。通过中国知网和Web of Science核心集,截至2023年3月31日,检索并筛选获取606篇相关文献,运用社会网络分析方法进行分析。其中300篇中文文献重点探讨个性化推荐算法对信息茧房形成的影响,306篇英文文献更多关注信息茧房与平台和用户行为之间的关系。基于信息茧房相关概念的研究明确其内涵和特征,根据平台、算法和用户3个维度的作用机制分析构建信息同质化视角下信息茧房形成机制框架,即社交平台内外部信息趋同导致了用户选择同质化、平台内容同质化以及用户群体同质化问题,并以正反馈的形式不断加强,最终形成信息茧房。由此,基于同质化视角,分别从政府、平台和用户3个主体层面提出社交商务平台应对信息茧房的策略。
