ObjectiveTo establish a geographical origin identification model for Foeniculi Fructus from Haiyuan， providing a new technical reference for the protection of Haiyuan's geo-authentic medicinal materials and its designation as a national geographical indication agricultural product. MethodsSamples of Foeniculi Fructus were collected from eight producing areas， including Minqin （Gansu）， Bozhou （Anhui）， Qingdao （Shandong）， Dezhou （Shandong）， Urumqi （Xinjiang）， Nujiang （Yunnan）， Gutuo （Inner Mongolia）， and Haiyuan （Ningxia）. Gas chromatography-ion mobility spectrometry （GC-IMS） was used to detect the volatile organic compounds （VOCs） in samples from these geographic origins. VOCs were qualitatively analyzed through dual matching with the National Institute of Standards and Technology （NIST） mass spectral database and the IMS drift time database. Using the Reporter module and Gallery Plot visualization tools within the LAV analytical platform， VOC fingerprint profiles characterizing geographic origins were constructed. A non-targeted analytical strategy was adopted， and 97 VOCs detected via GC-IMS were subjected to principal component analysis （PCA） and partial least squares discriminant analysis （PLS-DA） based on their differential distribution patterns to construct an origin identification model for Foeniculi Fructus from Haiyuan region. Key discriminative markers were screened using variable importance in projection （VIP） values greater than 1. ResultsA total of 97 VOCs were identified， including alcohols， aldehydes， ketones， esters， organic acids， terpenoids， ethers， alkenes， and benzenes. The PLS-DA model， based on VOCs data obtained by GC-IMS， effectively distinguished Foeniculi Fructus in Haiyuan region from those of other origins. During cross-validation， the model achieved a prediction parameter （Q²） of 0.976 and a goodness-of-fit parameter （R²） of 0.936， with no overfitting observed in permutation testing. Twelve key flavor markers with VIP > 1 were identified as characteristic indicators of Haiyuan origin. ConclusionA stable and highly predictive origin identification model for Foeniculi Fructus from Haiyuan was successfully established using GC-IMS technology， PLS-DA， and VIP-based marker screening. This model provides a novel technical strategy for accurately distinguishing Foeniculi Fructus in Haiyuan region from other regional varieties and offers new technical support for its protection as a geo-authentic medicinal material and a nationally designated geographical indication agricultural product in China.

ObjectiveTo establish a geographical origin identification model for Foeniculi Fructus from Haiyuan， providing a new technical reference for the protection of Haiyuan's geo-authentic medicinal materials and its designation as a national geographical indication agricultural product. MethodsSamples of Foeniculi Fructus were collected from eight producing areas， including Minqin （Gansu）， Bozhou （Anhui）， Qingdao （Shandong）， Dezhou （Shandong）， Urumqi （Xinjiang）， Nujiang （Yunnan）， Gutuo （Inner Mongolia）， and Haiyuan （Ningxia）. Gas chromatography-ion mobility spectrometry （GC-IMS） was used to detect the volatile organic compounds （VOCs） in samples from these geographic origins. VOCs were qualitatively analyzed through dual matching with the National Institute of Standards and Technology （NIST） mass spectral database and the IMS drift time database. Using the Reporter module and Gallery Plot visualization tools within the LAV analytical platform， VOC fingerprint profiles characterizing geographic origins were constructed. A non-targeted analytical strategy was adopted， and 97 VOCs detected via GC-IMS were subjected to principal component analysis （PCA） and partial least squares discriminant analysis （PLS-DA） based on their differential distribution patterns to construct an origin identification model for Foeniculi Fructus from Haiyuan region. Key discriminative markers were screened using variable importance in projection （VIP） values greater than 1. ResultsA total of 97 VOCs were identified， including alcohols， aldehydes， ketones， esters， organic acids， terpenoids， ethers， alkenes， and benzenes. The PLS-DA model， based on VOCs data obtained by GC-IMS， effectively distinguished Foeniculi Fructus in Haiyuan region from those of other origins. During cross-validation， the model achieved a prediction parameter （Q²） of 0.976 and a goodness-of-fit parameter （R²） of 0.936， with no overfitting observed in permutation testing. Twelve key flavor markers with VIP > 1 were identified as characteristic indicators of Haiyuan origin. ConclusionA stable and highly predictive origin identification model for Foeniculi Fructus from Haiyuan was successfully established using GC-IMS technology， PLS-DA， and VIP-based marker screening. This model provides a novel technical strategy for accurately distinguishing Foeniculi Fructus in Haiyuan region from other regional varieties and offers new technical support for its protection as a geo-authentic medicinal material and a nationally designated geographical indication agricultural product in China.

Nuclear factor E2-related factor 2 (Nrf2) is a major regulator of redox homeostasis in cells, and Nrf2 signaling pathway has anti-inflammatory, anti-oxidative stress, and anti-fibrosis effects while plays an important role in wound healing and pathological scar formation and progression. This article reviewed the related research regarding the effect of oxidative stress and Nrf2 signaling pathway on pathological scars, furthermore, it investigated the relationship between Nrf2 signaling pathway, oxidative stress and pathological scars, providing a new perspective for the study of mechanism and clinical prevention and treatments of pathological scars.

Objective:To analyze the current adoption of palliative care by patients with unresectable metastatic colorectal cancer (mCRC) in China.Methods:From 1 March 2023 to 30 June 2023, a questionnaire survey was conducted by random sampling. An exclusive research platform for the Blue Book on Clinical Diagnosis and Treatment of Metastatic Colorectal Cancer. An online questionnaire was sent to medical oncologists (including chief physicians, associate chief physicians, attending physicians and residents) in general hospitals and oncology hospitals in four major regions of East, Central, South and Northeast China. The questionnaire contained 28 questions requesting basic information about doctors, the number of patients with mCRC, the status of treatment from first to fourth line and beyond, points concerning treatment of pain in patients with mCRC, and expectations for the future. A medical team was responsible for the quality control of data collected, whereas statisticians performed the data cleaning and sorting and statistical analysis.Results:A total of 300 clinical questionnaires were collected, including 217 (72%) from doctors in general hospitals and 83 (28%) from doctors in oncology hospitals. Senior physicians (including associate chief physicians and chief physicians) accounted for 65% of the respondents, attending physicians 30%, and residents 5%. Within 3 months (average for each month), 46.4±26.6% patients were diagnosed with recurrent or unresectable mCRC by each physician, 51.6±26.8% of the patients being in cancer hospitals and 44.4±26.3% in general hospitals. One hundred percent of patients receiving first-line treatment received palliative care, as did 80.3% of those receiving second-line treatment, 58.2% of those receiving third-line treatment, and 35.1% of those receiving ≥fourth-line treatment. The primary factor governing selection of first-line treatment was guideline recommendations, whereas comorbidities and the patients' physical status dictated second line to fourth line treatment. Standard first-line treatment was administered to 93.8% of eligible patients, standard second-line treatment to 94.3%; and standard third-line treatment to 73.5%. First-line therapy included targeted therapy in 63.6% of patients and immunotherapy in 2.8%; second-line therapy included targeted therapy in 63.0% of patients and immunotherapy in 2.0%; third-line therapy included targeted therapy in 59.2% of patients and immunotherapy in 2.2%; and fourth-line therapy included targeted therapy in 48.7% of patients and immunotherapy in 3.1%. First-line treatment lasted an average of 9.6 months, second-line treatment 6.7 months, third-line treatment 4.9 months, and fourth-line treatment 3.7 months. More than 70% of the patients maintained a good quality of life after receiving first and second-line treatment and more than 60% of them had ECOG performance scores of 0–1. After receiving third- and fourth-line treatment, 50%–60% of patients maintained a good quality of life and 40%–50% of them maintained ECOG performance scores of 0–1. The survey also revealed that the main deficiencies in treatment were limited effectiveness of third-line treatment, insufficient availability and opportunity for clinical research, popularity of new drugs or new drug combination strategies, and limited channels for participation in multidisciplinary diagnosis and treatment. Clinicians reported looking forward to participating in more clinical research on new drugs, hearing about the experience of experts in the field, and discovery of new targets and new drugs that increased the options for posterior line treatment of colorectal cancer.Conclusions:This report objectively summarizes the current situation, treatment difficulties, and expectations of frontline physicians concerning management of mCRC, thus providing a basis for decision-making and future direction for the diagnosis and research on treatment of mCRC.

Nuclear factor E2-related factor 2 (Nrf2) is a major regulator of redox homeostasis in cells, and Nrf2 signaling pathway has anti-inflammatory, anti-oxidative stress, and anti-fibrosis effects while plays an important role in wound healing and pathological scar formation and progression. This article reviewed the related research regarding the effect of oxidative stress and Nrf2 signaling pathway on pathological scars, furthermore, it investigated the relationship between Nrf2 signaling pathway, oxidative stress and pathological scars, providing a new perspective for the study of mechanism and clinical prevention and treatments of pathological scars.

According to the high failure rate and high maintenance cost of SIF-Q260 enteroscope in Endoscopy Center of Zhongnan Hospital of Wuhan University,the causes for the failure of SIF-Q260 enteroscope were analyzed by the Reason model from four aspects of environmental impact,unsafe supervision,unsafe behavior precursor and unsafe behavior.In view of the analyzed causes of failures at all levels,measures should be proposed from three aspects of regular training to standardize the decontamination and use of endoscopes,appointment of special personnel to manage endoscopes,regular supervision and evaluation of the standardization of endoscopic decontamination,and improvement of the supervision system of endoscopes to block the"loopholes"in the system and provide a basis for the formulation of endoscopic quality control measures,which can prevent and reduce the occurrence of endoscopic failures.

Objective:To verify and calibrate the CT modeling curves of three CT devices in RayStation proton treatment planning system (TPS).Methods:CT-mass density (CT-MD) curves were established by CT Hounsfield units of different tissue substitute materials obtained by scanning the model with CT equipment. CT-stopping power (CT-SP) curves were established by calculation based on the chemical composition of various human tissues. The equivalent water thickness of tissue substitute modules was calculated with different CT modeling curves in TPS. The actual equivalent water thickness of various modules was measured by a Bragg peak detector, and compared with the calculated values of TPS to verify the accuracy of different CT models.Results:The differences of CT modeling curves were significantly different under different tube voltage scanning protocols. Compared with CT-MD curves, CT-SP curves based on the stoichiometric calibration were more suitable for proton dose calculation. However, the values of stopping power corresponding to high CT values still needed to be optimized, and the calculation error after calibration was less than 3%.Conclusion:The method of verifying and calibrating CT unit curves of proton TPS is described, proving that the CT-SP curves after stoichiometric calculation are more suitable for proton dose calculation.

Objective:To systematically integrate qualitative research on the psychological experience of non-suicidal self-injury (NSSI) in adolescents.Methods:A comprehensive literature search was conducted in databases including China National Knowledge Infrastructure, WanFang data, VIP, China Biology Medicine disc, PubMed, Web of Science, Embase, and Cochrane Library for qualitative studies on the psychological experience of NSSI in adolescents and the search period covered the inception of the databases until June 27, 2023. The methodological quality of the included studies was assessed using the Joanna Briggs Institute Critical Appraisal Checklist for Qualitative Research (2016 edition). The results were integrated using the Meta-synthesis method.Results:A total of 15 studies were included, comprising ten phenomenological studies, one descriptive qualitative study, one mixed-method study, one narrative study, one exploratory study, and one grounded theory study. Thirty-one findings were extracted and synthesized into ten categories, resulting in three main themes: triggers of adolescent NSSI, NSSI as a coping strategy, and the internal conflict and struggle of adolescents engaging in NSSI.Conclusions:Adolescents engaging in NSSI experience complex psychological and sensory responses. Healthcare professionals should closely monitor adolescents' emotional changes, enhance psychological assessments, and guide them in coping with negative emotions effectively to improve their physical and mental health.

With the proposal and development of new technologies, new methods, and new education theories, the research on medical education and teaching has been conducted extensively. The theories, methods, and management mode of the research on medical education and teaching are keeping pace with the times and thus promote the rapid improvement in teaching ability, medical talents, and the training level of medical humanities. However, current studies on medical education and teaching focus too much on the innovation of education theories, methods, and management and neglect the aspects such as educational ethics, student awareness, and assessment of potential benefits and risks. In addition, the lack of unified implementation and supervision standards in the whole process management of education research is also a problem that needs to be solved urgently, especially in empirical studies, which brings great challenges to the standardized implementation of education research. By performing an analogy with the clinical trial research system and summarizing education research and educational ethics, this study, for the first time, proposes a set of standardized and systematic medical education and research standards, including the paradigms of classification, staging and different stages. These standards provide a theoretical basis for implementing medical education research, improving the education compliance of target students, fully guaranteeing the benefits of target students, and avoiding the risks in education research, which provides a reference for standardized education research in other disciplines.

Breast cancer is the most common malignant tumor among women, and early diagnosis, coupled with optimized treatment strategies is crucial for improving the prognosis. In recent years, with the advancement of nanotechnology, manganese-based nanomaterials have shown potential in various aspects of early breast cancer diagnosis, drug delivery, and tumor treatment. Compared to other nanomaterials, manganese-based nanomaterials exhibit excellent biocompatibility and have become a significant focus in the research of breast cancer diagnosis and treatment.