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采前氨基乙氧基乙烯甘氨酸处理对‘黄冠’梨长期冷藏后果实品质和果心褐变的影响

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食品科学 2024年第3期45卷 159-166页

作者：何近刚冯云霄程玉豆关军锋河北省农林科学院生物技术与食品科学研究所河北石家庄050051 河北省植物转基因中心河北石家庄050051

为延长‘黄冠’梨贮藏期,减轻长期贮藏后货架期间果实品质劣变,采用不同浓度氨基乙氧基乙烯甘氨酸(aminoethoxyvinylglycine,AVG)在采前喷施‘黄冠’梨果实,在冷藏180 d及货架7 d((180+7)d)后检测相关指标。结果显示,采前喷施AVG可延缓... 详细信息

为延长‘黄冠’梨贮藏期,减轻长期贮藏后货架期间果实品质劣变,采用不同浓度氨基乙氧基乙烯甘氨酸(aminoethoxyvinylglycine,AVG)在采前喷施‘黄冠’梨果实,在冷藏180 d及货架7 d((180+7)d)后检测相关指标。结果显示,采前喷施AVG可延缓‘黄冠’梨果实硬度下降,维持可溶性固形物含量以及可滴定酸含量,有效抑制果面褐斑和果心褐变的发生,其中以200 mg/L AVG效果最好。‘黄冠’梨果实在长期冷藏时果心发生褐变,同时熊果苷、绿原酸以及总酚含量增加,多酚氧化酶活性升高;PbPAL1、PbPAL2、PbPPO1、PbPPO5、PbLOX1以及PbLOX5在冷藏期间表达量升高,货架期表达量随之下降。采前200 mg/L AVG处理‘黄冠’梨,可显著促进熊果苷、绿原酸以及总酚在整个贮藏过程中含量的增加,抑制多酚氧化酶活性升高,抑制PbPAL1、PbPAL2、PbPPO1、PbPPO5以及PbLOX5的表达,进而有效减少果心褐变的发生。

关键词：梨氨基乙氧基乙烯甘氨酸果心褐变酚类多酚氧化酶

‘秋月梨’采后生理特性与薄膜包装保鲜技术研究

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保鲜与加工 2024年第6期24卷 1-8页

作者：冯云霄何近刚程玉豆李楠王金萧陈存坤关军锋河北省农林科学院生物技术与食品科学研究所河北石家庄050051 天津市农业科学院农产品保鲜与加工技术研究所(国家农产品保鲜工程技术研究中心(天津)) 农业农村部农产品贮藏保鲜重点实验室天津市农产品采后生理与贮藏保鲜重点实验室天津300384

为探讨‘秋月梨’采后生理特性和保鲜技术,测定(20±1)℃常温下果实呼吸强度和乙烯释放速率,并设计了自发气调包装(MAP)、MAP与1-甲基环丙烯(1-MCP)结合(MAP+1-MCP)处理后于常温贮藏12 d,以及在逐步降温冷藏和直接冷藏两种降温方式下,开... 详细信息

为探讨‘秋月梨’采后生理特性和保鲜技术,测定(20±1)℃常温下果实呼吸强度和乙烯释放速率,并设计了自发气调包装(MAP)、MAP与1-甲基环丙烯(1-MCP)结合(MAP+1-MCP)处理后于常温贮藏12 d,以及在逐步降温冷藏和直接冷藏两种降温方式下,开展MAP、MAP+1-MCP、MAP与乙烯吸收剂(EA)结合(MAP+EA)处理后,进行(0±0.5)℃低温贮藏210 d,继续常温货架7 d,定期测定指标。结果表明:常温贮藏期间,‘秋月梨’呼吸跃变高峰不明显,乙烯释放速率很低,在24 d时出现高峰,推测‘秋月梨’为非典型呼吸跃变型果实。常温贮藏试验表明,MAP和MAP+1-MCP处理均可有效延缓‘秋月梨’果实硬度下降,抑制可溶性固形物含量(SSC)升高。低温贮藏试验表明,与MAP单一处理相比,两种降温方式下,MAP+EA处理均可降低果实的裂皮指数,但对果实品质、腐烂率、果心褐变指数和果肉褐变率无显著影响;直接冷藏时,MAP+1-MCP处理可明显抑制冷藏期间果实裂皮,减少货架期间果实腐烂率,但逐步降温方式会增加冷藏和货架期果心褐变指数和冷藏期果肉褐变率。因此认为,‘秋月梨’长期冷藏时,应采用1-MCP处理后直接入库冷藏。

关键词： ‘秋月梨’ 自发气调包装乙烯吸收剂 1-甲基环丙烯品质

The Study on the Strong Ground Motion Attenuation Relationship in the Pishan Area,Xinjiang Uygur Autonomous Region

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Earthquake Research in China 2018年第1期32卷 40-52页

作者： Li Wenqian Tao Zhengru Wei Bin he jingang Earthquake Agency of Xinjiang Uygur Autonomous Region Urumqi 830011China Institute of Engineering Mechanics China Earthquake AdministrationHarbin 150080China

Small earthquake data from the Pishan MS6.5 aftershocks is collected by the Xinjiang Regional Digital Seismic Observation *** parameters of the focal region are obtained by micro genetic inversion:stress dropΔσof 75.95 bars,quality factor parameters Q0of 186.33 andηof 0.26,geometric attenuation parameters R1of 72.18km and R2of *** calculate the Fourier spectrum and combine it with the random phase spectrum to get the ground motion time history,and build the strong motion acceleration attenuation *** strong ground motion acceleration attenuation of the Pishan area is thus *** of the insufficiency of strong ground motion records,we added the records from the Wuqia MS6.9 earthquake on October 5,2008,the Akto MS6.2 earthquake on October 6,2008,and the Lop MS6.0 earthquake on March 9,2012 to the *** comparison of the calculation results and the empirical attenuation relationships with strong ground motion records reveal that the strong motion data of Pishan and Lop earthquakes is higher than the empirical attenuation *** Wuqia MS6.9 earthquake strong motion data is consistent with Yu Yanxiangs(2013)short axis result,and lower than the present result.

关键词： Small earthquake data Parameters of focal region Micro genetic inversion Ground motion acceleration attenuation relationship

A Deep Learning Framework for Mass-Forming Chronic Pancreatitis and Pancreatic Ductal Adenocarcinoma Classification Based on Magnetic Resonance Imaging

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Computers, Materials & Continua 2024年第4期79卷 409-427页

作者： Luda Chen Kuangzhu Bao Ying Chen jingang Hao Jianfeng he Faculty of Information Engineering and Automation Kunming University of Science and TechnologyKunming650504China Department of Radiology Second Affiliated Hospital of Kunming Medical UniversityKunming650101China School of Physics and Electronic Engineering Yuxi Normal UniversityYuxi653100China

Pancreatic diseases, including mass-forming chronic pancreatitis (MFCP) and pancreatic ductal adenocarcinoma(PDAC), present with similar imaging features, leading to diagnostic complexities. Deep Learning (DL) methodshave been shown to perform well on diagnostic tasks. Existing DL pancreatic lesion diagnosis studies basedon Magnetic Resonance Imaging (MRI) utilize the prior information to guide models to focus on the lesionregion. However, over-reliance on prior information may ignore the background information that is helpful fordiagnosis. This study verifies the diagnostic significance of the background information using a clinical ***, the Prior Difference Guidance Network (PDGNet) is proposed, merging decoupled lesion andbackground information via the Prior Normalization Fusion (PNF) strategy and the Feature Difference Guidance(FDG) module, to direct the model to concentrate on beneficial regions for diagnosis. Extensive experiments inthe clinical dataset demonstrate that the proposed method achieves promising diagnosis performance: PDGNetsbased on conventional networks record an ACC (Accuracy) and AUC (Area Under the Curve) of 87.50% and89.98%, marking improvements of 8.19% and 7.64% over the prior-free benchmark. Compared to lesion-focusedbenchmarks, the uplift is 6.14% and 6.02%. PDGNets based on advanced networks reach an ACC and AUC of89.77% and 92.80%. The study underscores the potential of harnessing background information in medical imagediagnosis, suggesting a more holistic view for future research.

关键词： Pancreatic cancer pancreatitis background region prior normalization fusion feature difference guidance

A Dual Yamabe Flow and Related Integral Flows

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Chinese Annals of Mathematics,Series B 2024年第3期45卷 319-348页

作者： jingang XIONG School of Mathematical Sciences Laboratory of Mathematics and Complex SystemsMinistry of EducationBeijing Normal UniversityBeijing 100875China

The author studies a family of nonlinear integral flows that involve Riesz potentials on Riemannian manifolds. In the Hardy-Littlewood-Sobolev (HLS for short)subcritical regime, he presents a precise blow-up profile exhibited by the flows. In the HLS critical regime, by introducing a dual Q curvature he demonstrates the concentrationcompactness phenomenon. If, in addition, the integral kernel matches with the Green’s function of a conformally invariant elliptic operator, this critical flow can be considered as a dual Yamabe flow. Convergence is then established on the unit spheres, which is also valid on certain locally conformally flat manifolds.

关键词： Hardy-Littlewood-Sobolev functional Dual Q curvature Integral flow

Starting materials, processes and characteristics of bio-based foams: A review

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Journal of Bioresources and Bioproducts 2024年第2期9卷 160-173页

作者： Xiaohan Wang Jinwon Jang Yanqun Su jingang Liu Hongjie Zhang Zhibin he Yonghao Ni National Engineering Laboratory for Pulp and Paper China National Pulp and Paper Research Institute Co.Ltd.Beijing 100102China Limerick Pulp and Paper Centre and Department of Chemical Engineering University of New BrunswickNew Brunswick E3B 5A3Canada

Biofoam products have attracted considerable attention lately because there is a growing demand for green/sustainable *** this end,various biobased foams have either been developed or are currently in development,e.g.,bio-based polyurethanes(PUs),polylactic acid(PLA),starch,and polyhydroxyalkanotates(PHAs).Indeed,significant progress has been made;however,chal-lenges still persist,for example,biobased foam products have poor processability,inferior com-patibility,thermal and strength *** this review,we focus on five biofoam products:namely bio-based PUs,PLA,starch,PHAs,and cellulose biofoam products,along with their prop-erties and performance,as well as their manufacturing *** efforts are still needed to unlock the full potential of these bio-based products and meet the goal of complementing and gradually replacing some of their fossil-based ***,the challenges,as well as arising opportunities of future research directions are discussed.

关键词： Biofoam Bio-based polyurethanes Polylactic acid Polyhydroxyalkanotate Starch Cellulose Manufacturing process

康柏西普联合微切口白内障超声乳化术在糖尿病性白内障患者中的应用效果

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临床医学研究与实践 2024年第26期9卷 46-49页

作者：伊恩晖王懿杜兆江杨格强肖潇贺金刚王晟宇西安市中心医院眼科陕西西安710003 西安市中心医院肾病科陕西西安710003

目的探讨康柏西普联合微切口白内障超声乳化术在糖尿病性白内障患者中的应用效果。方法选取2020年6至2022年12月我院收治的80例(80眼)糖尿病性白内障患者作为研究对象,按不同手术方法将其分为对照组(40例,40眼)及观察组(40例,40眼)。对... 详细信息

目的探讨康柏西普联合微切口白内障超声乳化术在糖尿病性白内障患者中的应用效果。方法选取2020年6至2022年12月我院收治的80例(80眼)糖尿病性白内障患者作为研究对象,按不同手术方法将其分为对照组(40例,40眼)及观察组(40例,40眼)。对照组行微切口白内障超声乳化术,观察组行微切口白内障超声乳化术后即刻于玻璃体内注射康柏西普。比较两组的手术效果。结果术后1 d、1周,观察组的最佳矫正视力(BCVA)低于对照组,差异具有统计学意义(P<0.05)。术后1 d,观察组的眼压高于对照组,差异具有统计学意义(P<0.05)。术后1 d、1周、1个月,观察组的黄斑中心凹下视网膜厚度(SFRT)小于对照组,差异具有统计学意义(P<0.05)。术后3个月,观察组的黄斑区血管密度(VD)高于对照组,差异具有统计学意义(P<0.05)。术后3个月,两组的虹膜新生血管发生率比较,差异具有统计学意义(P<0.05)。术后,两组的球结膜下出血发生率比较,差异具有统计学意义(P<0.05)。结论康柏西普联合微切口白内障超声乳化术在糖尿病性白内障患者中的短期疗效较好。

关键词：微切口白内障超声乳化术康柏西普糖尿病性白内障

Overexpression of Sirt6 ameliorates sleep deprivation induced-cognitive impairment by modulating glutamatergic neuron function

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Neural Regeneration Research 2023年第11期18卷 2449-2458页

作者： Jinpiao Zhu Chang Chen Zhen Li Xiaodong Liu jingang he Ziyue Zhao Mengying he Binbin Nie Zili Liu Yingying Chen Kuanpin Su Xiang Li Juxiang Chen Hongbing Xiang Fuqiang Xu Kangguang Lin Zongze Zhang Jie Wang Department of Anesthesiology Brain Research CenterDepartment of NeurosurgeryZhongnan HospitalWuhan UniversityWuhanHubei ProvinceChina Department of Anesthesiology and Pain Medicine Tongji Hospital of Tongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei ProvinceChina Department of Anesthesia and Intensive Care Peter Hung Pain Research InstituteThe Chinese University of Hong KongHong Kong Special Administration RegionChina Key Laboratory of Magnetic Resonance in Biological Systems State Key Laboratory of Magnetic Resonance and Atomic and Molecular PhysicsNational Center for Magnetic Resonance in WuhanWuhan Institute of Physics and MathematicsInnovation Academy for Precision Measurement Science and TechnologyChinese Academy of Sciences-Wuhan National Laboratory for OptoelectronicsWuhanHubei ProvinceChina Key Laboratory of Nuclear Radiation and Nuclear Energy Technology Institute of High Energy PhysicsChinese Academy of SciencesBeijingChina The Brain Cognition and Brain Disease Institute(BCBDI) NMPA Key Laboratory for Research and Evaluation of Viral Vector Technology in Cell and Gene Therapy Medicinal ProductsShenzhen Key Laboratory of Viral Vectors for BiomedicineShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research InstitutionsShenzhenGuangdong ProvinceChina Mind-Body Interface Research Center(MBI-Lab) China Medical University HospitalTaichungTaiwanChina An-Nan Hospital China Medical UniversityTainanTaiwanChina Department of Neurosurgery Changhai HospitalNaval Medical UniversityShanghaiChina Department of Affective Disorders The Affiliated Brain Hospital of Guangzhou Medical UniversityGuangzhouGuangdong ProvinceChina Institute of Neuroscience and Brain Diseases Xiangyang Central HospitalAffiliated Hospital of Hubei University of Arts and ScienceXiangyangHubei ProvinceChina University of Chinese Academy of Sciences BeijingChina

Sleep benefits the restoration of energy metabolism and thereby suppo rts neuronal plasticity and cognitive ***6 is a NAD+-dependent protein deacetylase that has been recognized as an essential regulator of energy metabolism because it modulates various transcriptional regulators and metabolic *** aim of this study was to investigate the influence of Sirt6 on cerebral function after chronic sleep deprivation(CSD).We assigned C57BL/6J mice to control or two CSD groups and subjected them to AAV2/9-CMV-EGFP or AAV2/9-CMV-Sirt6-EGFP infection in the prelimbic cortex(PrL).We then assessed cerebral functional connectivity(FC) using resting-state functional MRI,neuron/astrocyte metabolism using a metabolic kinetics analysis;dendritic spine densities using sparse-labeling;and miniature excitato ry postsynaptic currents(mEPSCs) and action potential(AP) firing rates using whole-cell patchclamp *** addition,we evaluated cognition via a comprehensive set of behavioral *** with controls,Sirt6 was significantly decreased(Phe PrL after CSD,accompanied by cognitive deficits and decreased FC between the PrL and accumbens nucleus,piriform cortex,motor co rtex,somatosensory co rtex,olfactory tubercle,insular cortex,and ***6 ove rexpression reve rsed CSD-induced cognitive impairment and reduced *** analysis of metabolic kinetics using [1-13C] glucose and [2-13C] acetate showed that CSD reduced neuronal Glu4and GABA2synthesis,which could be fully restored via forced Sirt6 ***,Sirt6 ove rexpression reversed CSD-induced decreases in AP firing rates as well as the frequency and amplitude of mEPSCs in PrL pyramidal *** data indicate that Sirt6 can improve cognitive impairment after CSD by regulating the PrL-associated FC network,neuronal glucose metabolism,and glutamatergic ***,Sirt6 activation may have potential as a novel strategy for treating sleep disorder-related diseases.

关键词： chronic sleep deprivation cognitive impairment functional connectivity glutamatergic neurons metabolic kinetics neuronal-astrocytic glucose metabolism prelimbic cortex REM sleep Sirt6 synaptic function

弱碱三元污水稀释弱碱三元复合驱体系的可行性

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油田化学 2020年第3期37卷 474-482页

作者：何金钢大庆油田有限责任公司第一采油厂黑龙江大庆163000

随着弱碱三元复合驱的规模不断扩大,弱碱三元复合驱的采出液处理问题日益凸显,为研究弱碱三元污水稀释弱碱三元体系驱油的可行性,采用不同类型的污水稀释弱碱三元驱油体系,评价了不同污水稀释三元体系的黏性特征、界面活性和驱油能力,... 详细信息

随着弱碱三元复合驱的规模不断扩大,弱碱三元复合驱的采出液处理问题日益凸显,为研究弱碱三元污水稀释弱碱三元体系驱油的可行性,采用不同类型的污水稀释弱碱三元驱油体系,评价了不同污水稀释三元体系的黏性特征、界面活性和驱油能力,并通过现场试验进一步验证。研究结果表明:悬浮物含量100 mg/L、含油50 mg/L的弱碱三元污水回注油层的渗透率下限是100×10^-3μm^2,当渗透率高于300×10^-3μm^2时,三元污水可顺利注入。三元污水较深度污水稀释三元体系的增黏性略低、稳定性好、抗剪切性能好、分子线图尺寸小、黏弹性略低;界面活性范围相同、界面活性稳定性更好、乳化性能更好、抗吸附性能相同。在室内实验和现场试验中都表现出了三元污水稀释三元体系注入能力更好、含水降低幅度更低的特点。因此,采用弱碱三元污水稀释弱碱三元体系回注大庆油田二类油层具有技术和经济可行性。

关键词：弱碱三元污水弱碱三元复合驱注入能力界面活性可行性