Association between triglyceride-glucose index and colorectal polyps:A retrospective cross-sectional study

BACKGROUND Colorectal polyps(CPs)are frequently occurring abnormal growths in the colorectum,and are a primary precursor of colorectal cancer(CRC).The triglyceride-glucose(TyG)index is a novel marker that assesses metabolic health and insulin resistance,and has been linked to gastrointestinal cancers.AIM To investigate the potential association between the TyG index and CPs,as the relation between them has not been documented.METHODS A total of 2537 persons undergoing a routine health physical examination and colonoscopy at The First People's Hospital of Kunshan,Jiangsu Province,China,between January 2020 and December 2022 were included in this retrospective cross-sectional study.After excluding individuals who did not meet the eligibility criteria,descriptive statistics were used to compare characteristics between patients with and without CPs.Logistic regression analyses were conducted to determine the associations between the TyG index and the prevalence of CPs.The TyG index was calculated using the following formula:Ln[triglyceride(mg/dL)×glucose(mg/dL)/2].The presence and types of CPs was determined based on data from colonoscopy reports and pathology reports.RESULTS A nonlinear relation between the TyG index and the prevalence of CPs was identified,and exhibited a curvilinear pattern with a cut-off point of 2.31.A significant association was observed before the turning point,with an odds ratio(95% confidence interval)of 1.70(1.40,2.06),P<0.0001.However,the association between the TyG index and CPs was not significant after the cut-off point,with an odds ratio(95% confidence interval)of 0.57(0.27,1.23),P=0.1521.CONCLUSION Our study revealed a curvilinear association between the TyG index and CPs in Chinese individuals,suggesting its potential utility in developing colonoscopy screening strategies for preventing CRC.

Nondestructive technique for identifying nuclides using neutron resonance transmission analysis at CSNS Back-n

Nondestructive and noninvasive neutron assays are essential applications of neutron techniques.Neutron resonance transmission analysis(NRTA)is a powerful nondestructive method for investigating the elemental composition of an object.The back-streaming neutron line(Back-n)is a newly built time-of-flight facility at the China Spallation Neutron Source(CSNS)that provides neutrons in the eV to 300 MeV range.A feasibility study of the NRTA method for nuclide identification was conducted at the CSNS Back-n via two test experiments.The results demonstrate that it is feasible to identify different elements and isotopes in samples using the NRTA method at Back-n.This study reveals its potential future applications.

Study of the response of 10B-doped MCP to wide-energy range neutrons from eV to MeV

Neutron-sensitive microchannel plates(nMCPs)have applications in neutron detection,including energy spectrum measurements,neutron-induced cross sections,and neutron imaging.10B-doped MCPs(B-MCPs)have attracted significant attention owing to their potential for exhibiting a high neutron detection efficiency over a large neutron energy range.Good spatial and temporal resolutions are useful for neutron energy-resolved imaging.However,their practical applications still face many technical challenges.In this study,a B-MCP with 10 mol%10B was tested for its response to wide-energy neutrons from eV to MeV at the Back-n white neutron source at the China Spallation Neutron Source.The neutron detection efficiency was calibrated at 1 eV,which is approximately 300 times that of an ordinary MCP and indicates the success of 10 B doping.The factors that caused the reduction in the detection efficiency were simulated and discussed.The neutron energy spectrum obtained using B-MCP was compared with that obtained by other measurement methods,and showed very good consistency for neutron energies below tens of keV.The response is more complicated at higher neutron energy,at which point the elastic and nonelastic reactions of all nuclides of B-MCP gradually become dominant.This is beneficial for the detection of neutrons,as it compensates for the detection efficiency of B-MCP for high-energy neutrons.

10B-doped MCP detector developed for neutron resonance imaging at Back-n white neutron source

Neutron resonance imaging(NRI)has recently emerged as an appealing technique for neutron radiography.Its complexity surpasses that of conventional transmission imaging,as it requires a high demand for both a neutron source and detector.Consequently,the progression of NRI technology has been sluggish since its inception in the 1980s,particularly considering the limited studies analyzing the neutron energy range above keV.The white neutron source(Back-n)at the China Spallation Neutron Source(CSNS)provides favorable beam conditions for the development of the NRI technique over a wide neutron energy range from eV to MeV.Neutron-sensitive microchannel plates(MCP)have emerged as a cutting-edge tool in the field of neutron detection owing to their high temporal and spatial resolutions,high detection efficiency,and low noise.In this study,we report the development of a 10B-doped MCP detector,along with its associated electronics,data processing system,and NRI experiments at the Back-n.Individual heavy elements such as gold,silver,tungsten,and indium can be easily identified in the transmission images by their characteristic resonance peaks in the 1–100 eV energy range;the more difficult medium-weight elements such as iron,copper,and aluminum with resonance peaks in the 1–100 keV energy range can also be identified.In particular,results in the neutron energy range of dozens of keV(Aluminum)are reported here for the first time.

Retraction note to:Association between triglyceride-glucose index and colorectal polyps:A retrospective cross-sectional study

We have decided to retract the above article because we have concluded that the limitations in our data sample may potentially lead to misinterpretation of the findings.

Measurement of the ^(232)Th(n,f)cross section in the 1-200 MeV range at the CSNS Back-n

The ^(232)Th(n,f)cross section is very important in basic nuclear physics and applications based on the Th/U fuel cycle.Using the time-of-flight method and a multi-cell fast-fission ionization chamber,a novel measurement of the^(232)Th(n,f)cross sec-tion relative to^(235)U in the 1–200 MeV range was performed at the China Spallation Neutron Source Back-n white neutron source(Back-n).The fission event-neutron energy spectra of^(232)Th and^(235)U fission cells were measured in the single-bunch mode.Corrected 232Th/235U fission cross-sectional ratios were obtained,and the measurement uncertainties were 2.5–3.7%for energies in the 2–20 MeV range and 3.6–6.2%for energies in the 20–200 MeV range.The^(232)Th(n,f)cross section was obtained by introducing the standard cross section of^(235)U(n,f).The results were compared with those of previous theoreti-cal calculations,measurements,and evaluations.The measured 232Th fission cross section agreed with the main evaluation results in terms of the experimental uncertainty,and 232Th fission resonances were observed in the 1–3 MeV range.The present results provide^(232)Th(n,f)cross-sectional data for the evaluation and design of Th/U cycle nuclear systems.

内镜下乳头括约肌小切开术联合球囊扩张术治疗胆总管结石的临床价值

目的探讨采用内镜下乳头括约肌小切开术联合球囊扩张术(sEST+EPBD)治疗胆总管结石的临床疗效及可能存在的机制。方法选取2013年1月-2017年12月因胆总管结石入住该院的200例患者,分为单纯内镜下乳头括约肌切开术(EST)组和sEST+EPBD组,每组100例。对两组患者的手术时间、住院时间、总费用、并发症以及炎症指标进行比较分析。结果两组患者术后均未发生胰腺炎,所有患者均治愈。其中,sEST+EPBD组患者平均手术时间、住院时间、出血量及术后胆道感染均明显少于EST组(P<0.05)。两组患者总费用和胆道穿孔比较,差异无统计学意义(P>0.05)。术后1及24 h,sEST+EPBD组白细胞(WBC)、环氧化酶-2(Cox-2)、降钙素原(PCT)、C反应蛋白(CRP)以及肿瘤坏死因子(TNF-α)水平均明显低于EST组(P<0.01),而sEST+EPBD组的血淀粉酶水平明显升高(P<0.01);术后72 h,sEST+EPBD组WBC及Cox-2水平均明显低于EST组(P<0.05),PCT、CRP、淀粉酶以及TNF-α水平则差异无统计学意义(P>0.05)。结论sEST+EPBD是治疗胆总管结石的一种有效、安全的方法,能减少手术时间、住院时间,有效控制术后胆道感染的发生,并且能明显降低炎症反应。

内镜下乳头括约肌小切开术联合球囊扩张术在轻中度胆源性胰腺炎治疗中的价值

目的探讨应用内镜下乳头括约肌小切开术(s EST)联合球囊扩张术(EPBD)治疗轻中度胆源性胰腺炎患者的临床疗效。方法筛选出2013年1月-2015年12月因轻中度胆源性胰腺炎入住该院的60例患者,并随机分为对照组、单纯内镜下乳头括约肌切开术(EST)组和s EST+EPBD组,每组20例。比较分析3组患者分组当日血清学指标、术后炎症指标、手术并发症、住院情况指标以及随访情况指标。结果 3组患者分组当日血清淀粉酶、C反应蛋白(CRP)及降钙素原(PCT)值比较差异无统计学意义(P>0.05)。EST组和s EST+EPBD组总住院时间明显短于对照组(P<0.05),且s EST+EPBD组总住院费用明显低于对照组(P<0.05);另外,EST组和s EST+EPBD组1年内均无胆源性胰腺炎发生,并均成功实现胆囊切除,而对照组12例复发,仅10例完成胆囊切除。s EST+EPBD组术后血清淀粉酶水平明显高于EST组,而总住院时间、费用以及手术并发症明显低于EST组(P<0.05);然而,随访1年时间内,两组患者均无胆源性胰腺炎复发,并均最终实现胆囊切除,两组之间无明显差异。结论 s EST+EPBD是治疗轻中度胆源性胰腺炎的一种有效的、安全的方法,能减少住院时间及费用,降低术后并发,有利于患者间期实施腹腔镜下胆囊切除术。

天然生物质材料的制备、性质与应用(Ⅲ)——医护两用的糖胺聚糖:透明质酸

透明质酸是一种广泛存在于生物体内的糖胺聚糖,具有保湿、抗菌消炎、抗氧化、抗衰老、润滑关节、调节渗透压等多种生理功能。天然无毒、生物相容性优异、可生物降解的透明质酸具有独特的螺旋柱分子构型,且分子结构中含有可进行分子修饰并赋予其更多更强功能性质的羟基、酰胺基、糖苷键等活性位点,作为一类重要生物活性物质,透明质酸及其衍生物、复合物、掺混物在医疗、化妆品、食品等领域已得到广泛应用。本文阐述了透明质酸的名称、结构和来源,以及理化性质、生理功能、制备方法和近期的应用进展情况,并指出了透明质酸的发展前景和研究方向。

常用化妆品成型技术(Ⅰ)——油水一家:乳剂

乳剂一般是指一种或一种以上液体以小液滴的形式分散在另一种与之不相混溶的液体连续相中所构成的一类不均匀分散体系的液体剂型,常被用作活性及功能成分的载体或基质,已广泛应用于日化、纺织、皮革、造纸、采油、农药、高分子合成、食品、医药等多个行业领域。随着人们环境、生态观念的提升和对高品质健康生活的需求,生物相容性良好、可生物降解的环境友好型特色乳剂越来越受到关注。本文介绍了乳剂的组成和种类、乳化剂的选择原则和方法、乳剂的形成原理和制备影响因素,并有选择地介绍了近年来乳剂在化妆品及日化相关领域中比较有特色的应用情况。

Back-n white neutron source at CSNS and its applications

Back-streaming neutrons from the spallation target of the China Spallation Neutron Source(CSNS)that emit through the incoming proton channel were exploited to build a white neutron beam facility(the so-called Back-n white neutron source),which was completed in March 2018.The Back-n neutron beam is very intense,at approximately 29107 n/cm2/s at 55 m from the target,and has a nominal proton beam with a power of 100 kW in the CSNS-I phase and a kinetic energy of 1.6 GeV and a thick tungsten target in multiple slices with modest moderation from the cooling water through the slices.In addition,the excellent energy spectrum spanning from 0.5 eV to 200 MeV,and a good time resolution related tothe time-of-flight measurements make it a typical white neutron source for nuclear data measurements;its overall performance is among that of the best white neutron sources in the world.Equipped with advanced spectrometers,detectors,and application utilities,the Back-n facility can serve wide applications,with a focus on neutron-induced cross-sectional measurements.This article presents an overview of the neutron beam characteristics,the experimental setups,and the ongoing applications at Backn.

Measurement of the neutron total cross section of carbon at the Back-n white neutron beam of CSNS

To verify the performance of the neutron total cross-sectional spectrometer, the neutron total cross section of carbon is initially measured in the energy range of 1 eV to 20 MeV using the time-of-flight method. The measurement is performed at the Back-n white neutron source with a 76-m time-of-flight path using the China Spallation Neutron Source. A multilayer fast fission chamber with 235U and 238U is employed as the neutron detector. The diameter and thickness of the natural graphite sample are 70 mm and 40 mm, respectively. Signal waveforms are collected using a data acquisition system. Off-line data processing was used to obtain the neutron time-of-flight spectra and transmissions. The uncertainty of the counting statistics is generally approximately 3% for each bin in the energy range of 1–20 MeV. It is determined that the results for the neutron total cross section of carbon obtained using ^235U cells are in good agreement with the results obtained using 238U cells within limits of statistical uncertainty. Moreover, the measured total cross sections show good agreement with the broadening evaluated data.

Contrast sensitivity in 14 MeV fast neutron radiography

Fast neutron radiography(FNR) is an effective non-destructive testing technique.Due to the scattering effect and low detection efficiency,the detection limit of FNR under certain conditions cannot be determined.In order to obtain the minimum detectable thickness by FNR,we studied the contrast sensitivity of FNR lead samples,both theoretically and experimentally.We then clarified the relationship between pixel value and irradiation time,and sample materials and thickness.Our experiment,using a4-cm-thick lead sample,verified our theoretical expression of FNR contrast sensitivity.

常用化妆品成型技术(Ⅳ)--粒微效强:粉剂

粉剂是指外观呈粉状或粉质块状的干剂,通常是将功效成分、辅料及适当助剂一起混合粉碎得到的,广泛应用于化妆品、口腔卫生用品及医药、农药化肥、军工、油墨、印刷、化工、材料、建筑、饲料等多个行业领域。粉剂的性能主要由功效成分的性质决定,但也与粉剂的颗粒大小与形状、比表面积、密度、吸湿性、流动性等特性密切相关。本文介绍了粉剂的特性、生产设备、生产工艺,并着重介绍了粉剂在美容、美白、防晒化妆品及面膜、药妆和口腔卫生用品方面的应用情况,并简析了粉剂当前存在的问题、未来研发重点和发展趋势。

基于轨道交通车辆的远程故障诊断系统设计研究

通过对轨道交通车辆的远程故障诊断系统的设计,借助MVB总线实现对相关数据信息的采集与诊断。结合系统配置,主要包含数据采集单元、事件记录仪等。在借助以太网和PC端建立联系后,实现对数据的快速传播,并满足实时监控的需求。在将车辆运行数据及故障数据进行准确的记录后,还能够展现出实用性及可操作性的特征。

Effect of <i>pyk</i>gene location on constructing dATP conversion <i>E. coli</i>strain

A dATP conversion E. coli strain could be constructed when both pyk and adk1 gene were expressed successfully. pyk gene encodes pyruvate kinase (PK) could be expressed, when inserted it before adk1 gene which encodes adenylate kinase (AK) in plasmid pET-pyk-adk1 after transform into E. coli and the recombinant could be used to convert dATP from dAMP. Another plasmid pET-adk1-pyk, which inserted pyk gene behind of adk1, the recombinant E. coli transformed with this plasmid could not convert dAMP into dATP, pyk gene cannot be translated in this recombinant. The different translation levels of pyk with gene location switching caused mainly by the different secondary structures formed by the 5’-untranslation regions and the gene sequence of its5’-terminal. The dATP product E. coli strain could be constructed when cloned pyk gene at an optimum location.

Electronic Nose Technology Based on Quantum Dot Filters

The electronic nose with chemical dyes as sensor can react with target gas and have specific color changes. In general, RGB camera collects a group of images to record these changes used for pattern recognition. RGB filters are not sensitive to the slight color changes, which limits the performance of this kind of electronic nose. This paper demonstrates using quantum dot spec-troscopy technology to solve this problem. Multiple quantum dot filters are placed on the surface of image sensor. When capturing images, there are more response channels of the same incident light than RGB filters. Simulation and experiment both prove that quantum dot filters with appropriate processing are more sensitive to color changes than RGB filters.

Measurement of the neutron total cross section of^(9)Be at the Back-n white neutron source of CSNS

The neutron total cross section data of^(9)Be are essential in the nuclear structure model research of light nuclei and nuclear power installations.The neutron total cross section of^(9)Be in the 0.3 eV−120 MeV energy region has been measured using time-of-flight and transmission methods with the Neutron Total Cross Sectional Spectrometer(NTOX)based on the multi-cell fast fission chamber at the China Spallation Neutron Source(CSNS)-Back-n white neutron source(Back-n).The fission count-neutron energy distributions of ^(235)U and ^(238)U without samples and with Be samples with three thicknesses were measured in the double-bunch operation mode for a beam power of 100 kW.The Bayesian method was used to eliminate the influence of the double-bunch problem on neutron measurement in the energy region above 10 keV.The neutron total cross section of^(9)Be results was consistent with ENDF/B-VIII.0 evaluation library data in the 0.3 eV−20 MeV energy region.In the energy ranges of 0.3 eV to 10 keV and 0.01 to 20 MeV,the deviations between our results and the evaluation results of ENDF/B-VIII.0 were within 2.5%and 15%,respectively.In the resonance energy region,the measured resonance energies in our experiment were 0.63,0.82,and 2.8 MeV,respectively.The results showed that the total cross section uncertainties of three Be samples were within 2.2%in the energy region below 1 MeV.The total cross section uncertainty of 30 mm Be from ^(235)U was the smallest and less than 5%in the energy region of 0.3 eV−120 MeV.The results of this experiment can provide technical support for further data analysis and related nuclear data evaluation.

Identification and Functional Analysis of Serum Specific miRNAs in Recurrent Aphthous Stomatitis Patients with Excess-heat or Yin-deficiency

Background:The treatment of Traditional Chinese Medicine(TCM)in recurrent aphthous stomatitis(RAS)based on syndrome differentiation has won the international acceptance,but the molecular mechanism of excess-heat syndrome and yin-deficiency syndrome of RAS remains unclear.Objective:To clarify specific microRNAs(miRNAs)and their functions in RAS patients with excess-heat or yin-deficiency.Methods:Serum samples were collected from patients meeting the RAS diagnostic criteria of excess-heat or yin-deficiency syndrome and healthy individuals.Core miRNAs were then identified under miRNA microarray anal-yses.Target prediction and bioinformatic analyses were carried out and gene-pathway-networks were visualized to better understand the relationship between different genes and pathways.Results:(1)90 individuals meeting the inclusion criteria were collected in this study.Among them,9 miRNAs were screened out in excess-heat syndrome group(EH group),with 1 upregulated and 8 downregulated.And four miRNAs(hsa-miR-20b-5p,hsa-miR-122-5p,hsa-miR-483-5p and hsa-miR-3197)were validated by real-time PCR method.14 miRNAs were screened out in yin-deficiency syndrome group(YD group)(7 upregulated and 7 downregulated).And hsa-miR-17-5p,hsa-miR-106-5p and hsa-miR-20b-5p were validated.(2)A total of 4,776 target genes were identified in EH group which enriched in GO categories including nervous system development and calcium ion binding and pathway such as PI3K-Akt signaling pathway and Calcium signaling pathway.10,172 target genes were identified in YD group which enriched GO categories included protein binding and positive regulation of transcription from RNA polymerase II promoter and pathway included MAPK signaling pathway and Ras signaling pathway.Conclusion:Hsa-miR-20b-5p in patients with RAS could act as the novel target for the classification of the syndrome.It is upregulated in RAS patients with excess-heat syndrome while downregulated in patients with yin-deficiency syndrome.The PI3K-Akt and MAPK signaling pathways and their related target genes may provide new insights into the molecular mechanisms of RAS with excess-heat syndrome or yin-deficiency syndrome,respectively.

In-beam gamma rays of CSNS Back-n characterized by black resonance filter

The back-streaming white-neutron beamline(Back-n)of the China Spallation Neutron Source is an essential neutronresearch platform built for the study of nuclear data,neutron physics,and neutron applications.Many types of cross-sectional neutron-reaction measurements have been performed at Back-n since early 2018.These measurements have shown that a significant number of gamma rays can be transmitted to the experimental stations of Back-n along with the neutron beam.These gamma rays,commonly referred to as in-beam gamma rays,can induce a non-negligible experimental background in neutron-reaction measurements.Studying the characteristics of in-beam gamma rays is important for understanding the experimental background.However,measuring in-beam gamma rays is challenging because most gamma-ray detectors are sensitive to neutrons;thus,discriminating between neutron-induced signals and those from in-beam gamma rays is difficult.In this study,we propose the use of the black resonance filter method and a CeBr_(3) scintillation detector to measure the characteristics of the in-beam gamma rays of Back-n.Four types of black resonance filters,^(181)Ta,^(59)Co,^(nat)Ag,and^(nat)Cd,were used in this measurement.The time-of-flight(TOF)technique was used to select the detector signals remaining in the absorption region of the TOF spectra,which were mainly induced by in-beam gamma rays.The energy distribution and flux of the in-beam gamma rays of Back-n were determined by analyzing the deposited energy spectra of the CeBr_(3) scintillation detector and using Monte Carlo simulations.Based on the results of this study,the background contributions from in-beam gamma rays in neutron-reaction measurements at Back-n can be reasonably evaluated,which is beneficial for enhancing both the experimental methodology and data analysis.