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基于太赫兹成像技术的茶叶基质表面多菌灵农残分布与检测分析

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西南大学学报（自然科学版） 2024年第6期46卷 176-185页

作者：唐鑫邹佳岐祝诗平周胜灵西南大学工程技术学院重庆400715

采用太赫兹(THz)成像技术实现茶叶复杂基质上多菌灵定位及质量浓度分析.首先提取多菌灵压片THz光谱,得到位于1.15 THz和1.32 THz处的特征吸收峰,证明了太赫兹光谱检测多菌灵成分的有效性.其次,对比不同茶叶基质上多菌灵成像效果,确定最... 详细信息

采用太赫兹(THz)成像技术实现茶叶复杂基质上多菌灵定位及质量浓度分析.首先提取多菌灵压片THz光谱,得到位于1.15 THz和1.32 THz处的特征吸收峰,证明了太赫兹光谱检测多菌灵成分的有效性.其次,对比不同茶叶基质上多菌灵成像效果,确定最佳样本制备条件;制备800,1700,2300,3000,3700,4500,5000 mg/L 7个不同质量浓度的茶叶农残样本,采用时域切片法,选择时间延迟为13.98 ps进行成像,并进行超分辨率重建,实现多菌灵区域精确定位.鉴于THz叶片图像难以获得参考图像,采用自然图像质量评价(NIQE)、基于空间和光谱熵的无参考图像评估(SSEQ)和无参考空间域质量评估(BRISQUE)3种评价方法对重建前后的图像进行质量评估.结果表明,重建得到的图像评分更优,可以有效提高图像分辨率.最后,采用图像分割算法提取农残分布区域,建立光谱透射强度与农药质量浓度的关系方程,实现多菌灵定量分析.

关键词：茶叶太赫兹超分辨率农药残留多菌灵

β细胞中FOXO1表达在2型糖尿病进程和衰老中的改变

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中华内分泌代谢杂志 2024年第5期40卷 414-419页

作者：梁瑞刘腾丽邹家琦张博雅王树森刘娜天津市第一中心医院卫健委危重病急救医学重点实验室天津300384 南开大学移植医学研究院天津市第一中心医院天津300192 天津市第一中心医院器官移植中心天津300192

目的探究β细胞去分化在2型糖尿病以及衰老人群中的变化规律。方法利用12例糖尿病前期、21例2型糖尿病以及27例对照器官捐献者胰腺样本, 通过免疫荧光染色检测FOXO1和胰岛素的表达, 检测β细胞去分化水平。对60例胰腺样本β细胞去分化... 详细信息

目的探究β细胞去分化在2型糖尿病以及衰老人群中的变化规律。方法利用12例糖尿病前期、21例2型糖尿病以及27例对照器官捐献者胰腺样本, 通过免疫荧光染色检测FOXO1和胰岛素的表达, 检测β细胞去分化水平。对60例胰腺样本β细胞去分化水平与糖化血红蛋白(hemoglobin A_(1C), HbA_(1C))进行相关性分析;分别对非糖尿病和2型糖尿病胰腺β细胞去分化水平与年龄进行相关性分析。结果 FOXO1主要在人胰岛β细胞的细胞质表达, 2型糖尿病患者FOXO1-INS+/INS+细胞比例较对照组和糖尿病前期显著增加, 且与HbA_(1C)水平呈正相关(r=0.623,P<0.001)。2型糖尿病年轻组FOXO1-INS+/INS+细胞比例比非糖尿病年轻组和年老组都显著增加, 而年老组在年轻组的基础上进一步显著增加。在2型糖尿病中, FOXO1-INS+/INS+细胞比例与年龄呈正相关(r=-0.53,P<0.05)。结论高血糖与衰老引起2型糖尿病胰岛β细胞去分化水平增加。

关键词：糖尿病 β细胞去分化老龄化糖化血红蛋白

诺尼果多糖对高脂膳食小鼠胆汁酸代谢和肠道菌群的影响

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现代食品科技 2024年第6期40卷 1-11页

作者：邹嘉琪吴小勇彭紫君伍芳芳郑传进广东药科大学食品科学学院广东中山528453

为探究诺尼果多糖对长期高脂膳食引起的代谢紊乱和肥胖的预防作用及其可能机制,该研究分别通过饲以高脂饲料建立高脂膳食小鼠模型和灌胃广谱抗生素建立伪无菌小鼠模型,分析比较诺尼果多糖干预对高脂膳食小鼠体质量、粪便总胆汁酸含量(To... 详细信息

为探究诺尼果多糖对长期高脂膳食引起的代谢紊乱和肥胖的预防作用及其可能机制,该研究分别通过饲以高脂饲料建立高脂膳食小鼠模型和灌胃广谱抗生素建立伪无菌小鼠模型,分析比较诺尼果多糖干预对高脂膳食小鼠体质量、粪便总胆汁酸含量(Total Bile Acid,TBA)和肠道菌群组成的影响。结果表明与高脂膳食组相比,诺尼果多糖组小鼠体质量降低11.91%,粪便总胆汁酸含量增加29.58%。但在伪无菌高脂膳食小鼠中,诺尼果多糖的上述作用未能有效发挥,说明肠道菌群在诺尼果多糖抑制高脂膳食小鼠体质量增长,促进小鼠粪便总胆汁酸排出中发挥关键作用。Spearman相关性分析结果表明,粪杆菌(Faecalibaculum)、杜氏乳杆菌(Dubosiella)、鼠杆菌(Muribaculaceae)等是在第4周和第12周均发挥促进TBA排出,抑制小鼠体质量增长作用的菌属。该研究结果表明,诺尼果多糖通过促进上述有益肠道菌的增殖,发挥促进高脂膳食小鼠TBA排出,抑制高脂膳食小鼠体质量增长的作用。

关键词：诺尼果多糖肥胖粪便总胆汁酸肠道菌群

Preparation of core-shell magnetic Fe_3O_4@SiO_2-dithiocarbamate nanoparticle and its application for the Ni^(2+), Cu^(2+) removal

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Chinese Chemical Letters 2018年第6期29卷 887-891页

作者： Yimin Dai Lanli Niu jiaqi zou Tianxiao Chen Hui Liu Yi Zhou School of Chemistry and Biological Engineering Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation Changsha University of Science and Technology

A novel magnetic nanoparticles-based dithiocarbamate absorbent（Fe3O4@SiO2-DTC） with core-shell structure was synthesized under mild conditions and used in aqueous solution Ni2＋ and Cu2＋ ions treatment. The structure, morphology and magnetic properties of the adsorbent were characterized by Xray diffraction（XRD）, fourier transformed infrared spectroscopy（FTIR）, scanning electron microscopy（SEM）, transmission electron microscopy（TEM）, and vibrating sample magnetometer（VSM）.Fe3O4@SiO2-DTC exhibited a typical superparamagnetic with a saturation magnetization value of52.7 emu/g, which could be rapidly separated from aqueous solution under external magnetic field. We investigated the effects of solution p H, adsorption time, and the initial concentration of heavy metal ions on the adsorption of Ni2＋ and Cu2＋. The adsorption equilibrium times of Ni2＋and Cu2＋ on Fe3 O4@SiO2-DTC were reached at 15 min and 90 min, respectively. The adsorption kinetic data were fitted to the pseudosecond-order model, and the adsorption data were consistent with the Frenudlich isotherm model. When the initial concentration of heavy metal ions was 250 mg/L, the maximum adsorption capacity of Ni2＋ and Cu2＋ at room temperature was 235.23 mg/g and 230.49 mg/g, respectively. In addition, we discussed the plausible adsorption mechanism. The results indicated that the adsorption was mainly dominated by chelation.

关键词： Core-shell Magnetic nanoparticle Dithiocarbamate Adsorption Heavy metals removal

缺氧抑制胰岛β细胞中5-羟色胺生成的机制研究

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中华糖尿病杂志 2024年第9期16卷 1040-1046页

作者：梁瑞宋心瑶邹家琦王乐张博雅刘腾丽王树森刘娜天津市第一中心医院卫健委危重病急救医学重点实验室南开大学移植医学研究院天津天津市儿童医院普外科天津天津市第一中心医院卫健委危重病急救医学重点实验室天津天津市第一中心医院器官移植中心天津天津市第一中心医院卫健委危重病急救医学重点实验室南开大学移植医学研究院天津市第一中心医院器官移植中心天津

目的探讨缺氧条件下胰岛中5-羟色胺的表达水平及其调节机制。方法将体外培养的人胰岛分为对照组和氯化钴(CoCl2)处理组, 每组设置3个平行组, 通过免疫荧光染色检测人胰岛中的5-羟色胺表达水平。将β细胞系NIT-1细胞分为7组:对照组、CoCl... 详细信息

目的探讨缺氧条件下胰岛中5-羟色胺的表达水平及其调节机制。方法将体外培养的人胰岛分为对照组和氯化钴(CoCl2)处理组, 每组设置3个平行组, 通过免疫荧光染色检测人胰岛中的5-羟色胺表达水平。将β细胞系NIT-1细胞分为7组:对照组、CoCl2处理组、缺氧(1% O2)组、缺氧诱导因子1α(Hif1α)激活剂二甲基乙二酰氨基乙酸(DMOG)组、小干扰RNA对照(sictrl)组、sictrl+CoCl2组、siHif1α+CoCl2组, 每组设置3个平行组。通过实时荧光定量聚合酶链反应(qRT-PCR)和Western blotting检测5-羟色胺合成限速酶色氨酸羟化酶(Tph1)的表达水平。组间比较采用独立样本t检验。结果在人胰岛中, 与对照组相比, CoCl2处理组5-羟色胺的表达水平显著降低(P<0.001)。在NIT-1细胞中, 与对照组相比, CoCl2处理和缺氧处理(1% O2)均显著抑制Tph1表达(P<0.05), 且Hif1α激活剂DMOG提高Hif1α表达(P<0.05), 同时显著抑制Tph1表达(P<0.05);与siCtrl组相比, siCtrl+CoCl2组Tph1表达显著下调(P<0.05), 而siHif1α+CoCl2组较siCtrl+CoCl2组Tph1表达显著上调(P<0.05)。结论在缺氧条件下, Hif1α抑制Tph1的表达, 从而降低胰岛中5-羟色胺的表达水平。

关键词：缺氧缺氧诱导因子1, α亚基 5-羟色胺 β细胞

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人参α-淀粉酶抑制肽的降血糖作用

现代食品科技 2024年第7期40卷 24-34页

作者：杨雯邹佳琪刘胜楠刘士伟薛婷芳孟星坚于雷詹晓峰毕云枫吉林农业大学食品科学与工程学院吉林长春130118 吉林省宏久生物科技股份有限公司吉林通化135118

通过采用高糖高脂饲料联合腹腔注射链脲佐菌素(Streptozotocin,STZ)构建小鼠2型糖尿病(Type 2 Diabetes,T2DM)模型,建模成功后连续4周给药治疗T2DM小鼠,以小鼠体质量、脏器指数、血糖、血脂、肝脏氧化应激反应、肝脏病理学检验结果作为... 详细信息

通过采用高糖高脂饲料联合腹腔注射链脲佐菌素(Streptozotocin,STZ)构建小鼠2型糖尿病(Type 2 Diabetes,T2DM)模型,建模成功后连续4周给药治疗T2DM小鼠,以小鼠体质量、脏器指数、血糖、血脂、肝脏氧化应激反应、肝脏病理学检验结果作为参考指标,探究人参α-淀粉酶抑制肽对T2DM小鼠的降糖作用。结果表明,阿卡波糖阳性组和人参α-淀粉酶抑制肽各剂量组对小鼠的体重下降情况、高血糖情况均有不同程度的改善作用及调控效果,所以人参α-淀粉酶抑制肽各个剂量对T2DM小鼠具有降糖的效果。经过4周的治疗,高剂量组血糖从建模后的15.43 mmol/L下降至12.10 mmol/L与阿卡波糖阳性组血糖从建模后的15.71 mmol/L下降至10.17 mmol/L结果相近,且两组的小鼠肝脏损伤较轻,说明高剂量的人参α-淀粉酶抑制肽对2型糖尿病引发的肝脏损伤可起到明显的防护效果(P<0.01)。因此,人参α-淀粉酶抑制肽具有降血糖的作用和成为辅助治疗2型糖尿病产品或保健品的潜力。

关键词：人参α-淀粉酶抑制肽降血糖 2型糖尿病链脲佐菌素人参

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Multiple model PHD filter for tracking sharply maneuvering targets using recursive RANSAC based adaptive birth estimation

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Journal of Systems Engineering and Electronics 2024年第3期35卷 780-792页

作者： DING Changwen ZHOU Di zou Xinguang DU Runle LIU jiaqi School of Astronautics Harbin Institute of TechnologyHarbin 150001China School of Electronics and Information Engineering Harbin Institute of TechnologyHarbin 150001China National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematics Beijing 100076China

An algorithm to track multiple sharply maneuvering targets without prior knowledge about new target birth is proposed. These targets are capable of achieving sharp maneuvers within a short period of time, such as drones and agile *** probability hypothesis density (PHD) filter, which propagates only the first-order statistical moment of the full target posterior, has been shown to be a computationally efficient solution to multitarget tracking problems. However, the standard PHD filter operates on the single dynamic model and requires prior information about target birth distribution, which leads to many limitations in terms of practical applications. In this paper,we introduce a nonzero mean, white noise turn rate dynamic model and generalize jump Markov systems to multitarget case to accommodate sharply maneuvering dynamics. Moreover, to adaptively estimate newborn targets’information, a measurement-driven method based on the recursive random sampling consensus (RANSAC) algorithm is proposed. Simulation results demonstrate that the proposed method achieves significant improvement in tracking multiple sharply maneuvering targets with adaptive birth estimation.

关键词： multitarget tracking probability hypothesis density(PHD)filter sharply maneuvering targets multiple model adaptive birth intensity estimation

Application of efficient and sustainable freeze-dissolving technology in manufacturing of KHCO_(3)ultrafine particles

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Green Chemical Engineering 2024年第2期5卷 266-272页

作者： jiaqi Luo Qifan Su Qiushuo Yu Xinyue Zhai Yuan zou Huaiyu Yang School of Chemical Engineering Chemical Engineering Research Center of the Ministry of Education for Advanced Use Technology of Shanbei EnergyInternational Science&Technology Cooperation Base of MOST for Clean Utilization of Hydrocarbon ResourcesNorthwest UniversityXi’an710069China Department of Chemical Engineering Loughborough UniversityLoughboroughLE113TUUnited Kingdom

The development of ultrafine particles provided a new way to solve problems in the fields of energy,environment,and medicine,and had become one of the most promising ***,the application of ultrafine particles required the development of cleaner,greener,and more efficient preparation *** new freeze-dissolving technology has been applied in manufacturing of KHCO_(3)ultrafine particles,with an aqueous solution of 0.02-0.1 g KHCO_(3)/g *** ice particles were formed after dripping the solution into liquid *** antisolvent ethanol was used to dissolve the ice spherical template at a temperature below 273.15 K,and the pre-formed KHCO_(3)ultrafine particles inside the ice template remained in the ethanol aqueous *** ice particles were put into the freeze dryer to isolate the ultrafine KHCO_(3)*** with the particles produced with traditional freeze-drying technology,the ultrafine powder/particles produced by the freeze-dissolving technology were smaller with narrower size *** freeze-dissolving technology has demonstrated a much more sustainable and efficient manufacturing process than the traditional freeze-drying *** addition,the influence of the concentrations of KHCO_(3)and the sizes of ice particles were investigated with the discussions of mechanisms.

关键词： Freeze-dissolving Freeze-drying Ultrafine particles Sustainable

A case of abdominal abscess after simultaneous omentum intraomental bio-scaffold islet-kidney transplantation

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Journal of Pancreatology 2023年第3期6卷 127-132页

作者： Zewen Liu Guanghui Pei Xiangheng Cai jiaqi zou Xuejie Ding Peng Sun Rui Liang Boya Zhang Shusen Wang Organ Transplant Center NHC Key Laboratory for Critical Care MedicineTianjin First Central HospitalNankai UniversityTianjinChina Organ Transplant Center Fujian Medical University Union HospitalFuzhouChina School of Medicine Nankai UniversityTianjinChina

Compared with patients who undergo renal and islet transplantation sequentially,simultaneous omentum intraomental bio-scaf-fold islet-kidney transplantation in patients with type 1 diabetes complicated by renal failure has the advantages of donor homolo-gation,less trauma,lower cost,and easier acceptance by *** intraomental bio-scaffold islet has been gradually applied in clinical practice,and rare clinical complications have been *** we report a case of abdominal abscess associated with extended-spectrum β-lactamase in a patient who underwent simultaneous omentum intraomental bio-scaffold islet-kidney transplantation;the islet grafts remained partially functional after appropriate anti-infective treatment.

关键词： Donor-derived infection Extended-spectrum beta-lactamase producing Klebsiella pneumoniae Omentum intraomen-tal bio-scaffold islet transplantation