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不同种类黄骅低盐虾酱的营养测定与综合评价

中国酿造 2024年第6期43卷 252-257页

作者：朱洪智李彦国何雪娟李倩楠唐雯沧州医学高等专科学校河北沧州061000

该研究在制备3种低盐虾酱(低盐虾米酱、低盐虾丝酱和低盐对虾酱)的基础上,对其营养成分进行测定,采用营养质量指数(INQ)、营养素安全摄入上限(UL)、氨基酸评分(AAS)、致动脉粥样硬化指数(AI)和致血栓指数(TI)等指标对3种低盐虾酱进行综... 详细信息

该研究在制备3种低盐虾酱(低盐虾米酱、低盐虾丝酱和低盐对虾酱)的基础上,对其营养成分进行测定,采用营养质量指数(INQ)、营养素安全摄入上限(UL)、氨基酸评分(AAS)、致动脉粥样硬化指数(AI)和致血栓指数(TI)等指标对3种低盐虾酱进行综合评价。结果表明,低盐虾米酱、低盐对虾酱和低盐虾丝酱蛋白质的含量分别为14.80 g/100 g、14.90 g/100 g、13.70 g/100 g,且氨基酸评分均>97分,矿物质和维生素的INQ值均>1(1.51~30.80),维生素和矿物质风险指数较低(1.11%~13.33%),AI值和TI值分别为0.58、0.35、0.53;0.07、0.16、0.06,n-6不饱和脂肪酸/n-3不饱和脂肪酸(n-6PUFA/n-3PUFA)比值分别为0.12、0.98和0.16。因此,3种低盐虾酱是低能量、高营养食品,导致心血管疾病的风险较低。

关键词：低盐虾酱营养测定综合评价心血管疾病

Mo_(2)C-TiN_(0.3)复合材料的高温高压制备及性能

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金刚石与磨料磨具工程 2024年第4期44卷 440-448页

作者：邹芹王宽李艳国戴伟绩罗永安燕山大学机械工程学院河北秦皇岛066004 燕山大学亚稳材料制备技术与科学国家重点实验室河北秦皇岛066004

将Mo_(2)C和TiN_(0.3)粉体采用机械合金化和高温高压烧结相结合的方法进行分层烧结,并制备30%Mo_(2)C-70%TiN_(0.3)的烧结体复合材料,分析Mo_(2)C-TiN_(0.3)烧结体的物相组成、微观组织结构及力学性能。结果表明:Mo_(2)C和TiN_(0.3)间... 详细信息

将Mo_(2)C和TiN_(0.3)粉体采用机械合金化和高温高压烧结相结合的方法进行分层烧结,并制备30%Mo_(2)C-70%TiN_(0.3)的烧结体复合材料,分析Mo_(2)C-TiN_(0.3)烧结体的物相组成、微观组织结构及力学性能。结果表明:Mo_(2)C和TiN_(0.3)间存在明显的相互扩散,且形成了2层不同的扩散层;随着烧结温度不断升高,Mo_(2)C-TiN_(0.3)烧结体的晶粒尺寸逐渐变大,会导致烧结体的机械性能变差;在烧结过程中有高硬高脆的MoC生成,能够维持Mo_(2)C-TiN_(0.3)烧结体的硬度在19.0~20.0 GPa,但会降低其断裂韧性。

关键词： TiN_(0.3) Mo_(2)C 扩散高温高压烧结机械合金化

结合剂比例和cBN粒度配比对PcBN复合材料微观结构和性能的影响

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金刚石与磨料磨具工程 2024年第2期44卷 185-192页

作者：邹芹董培航李艳国袁振雄武迪罗永安燕山大学亚稳材料制备技术与科学国家重点实验室河北秦皇岛066004 燕山大学机械工程学院河北秦皇岛066004

在高温高压条件下制备了聚晶立方氮化硼(PcBN)复合材料。采用X射线衍射(XRD)、扫描电子显微镜(SEM)、能谱仪(EDS)等研究了结合剂配比和立方氮化硼(cBN)粒度对PcBN复合材料的成分、微观结构、显微硬度和磨耗比的影响。实验结果表明:在压... 详细信息

在高温高压条件下制备了聚晶立方氮化硼(PcBN)复合材料。采用X射线衍射(XRD)、扫描电子显微镜(SEM)、能谱仪(EDS)等研究了结合剂配比和立方氮化硼(cBN)粒度对PcBN复合材料的成分、微观结构、显微硬度和磨耗比的影响。实验结果表明:在压力5.5 GPa,温度1400℃,保温10 min的烧结条件下,当V(TiN_(0.3))∶V(AlN)=70∶30时,PcBN复合材料性能较为优异,硬度最高达到22.7 GPa,磨耗比达到149.2;当PcBN复合材料中cBN粒度组合为V(0.5~1μm)∶V(2~5μm)∶V(5~10μm)=3∶5∶2时,颗粒之间的堆积密度达到最高,性能也达到最优。

关键词： PcBN复合材料高温高压结合剂粒度

现代医院建筑净化区域装修材料的选用探讨——北京安贞医院通州院区建设项目案例

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中国医院建筑与装备 2024年第2期25卷 66-72页

作者：刘杨李延国王志滨首都医科大学附属北京安贞医院北京100029 北京城建新城投资开发有限公司北京101300 北京城建集团医疗康养工程总承包部北京101300

结合北京安贞医院通州院区建设项目,阐述了医院洁净手术室、洁净走廊、洁净辅助用房等净化区域装修材料的选用原则及安贞医院项目所选材料的具体种类。洁净区装修材料的选用应遵循不产尘、不易积尘、耐腐蚀、耐碰撞、不开裂、防潮防霉... 详细信息

结合北京安贞医院通州院区建设项目,阐述了医院洁净手术室、洁净走廊、洁净辅助用房等净化区域装修材料的选用原则及安贞医院项目所选材料的具体种类。洁净区装修材料的选用应遵循不产尘、不易积尘、耐腐蚀、耐碰撞、不开裂、防潮防霉、容易清洁、环保节能和符合防火要求的原则。可通过对比不同装修材料的材质、色彩、纹理及造价等,综合考虑人性化、绿色、低碳、节能和经济等因素进行合理选材,从而营造出舒适、健康、美观、环保、和谐的诊疗环境。

关键词：医院建筑装修材料净化区域安贞医院通州院区

Fabrication of onion-like carbon from nanodiamond by annealing

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Science China(Technological Sciences) 2009年第12期52卷 3683-3689页

作者： Qin Zou MingZhi Wang yanguo li YuCheng Zhao liangHua Zou State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 China

Onion-like carbon (OLC) was synthesized by annealing nanodiamond in low vacuum of 1 Pa and at annealing temperatures from 500°C to 1400°C. The high-resolution transmission electron microscope (HRTEM) images, X-ray diffraction (XRD) and Raman spectrum of the OLC showed that there was no OLC when the annealing temperature was lower than 900°C. Moreover, the fragment amorphous carbon existed on the surfaces of the nanodiamond particles. At the annealing temperature of 900°C, the OLC particles began appearing and the size of the OLC particles was smaller than 5 nm. When the annealing temperature was increased from 900°C to 1400°C, the nanodiamond was transformed into OLC gradually. At the annealing temperature of 1400°C, all the nanodiamond particles were transformed into OLC completely. The OLC exhibited similarity to the original nanodiamond particles in shape. A mechanism for the OLC synthesis by annealing was provided. The graphitization started at the surfaces of the nanodiamond particles. The formation process of the OLC includes formation of graphite fragments, connection and curvature of graphite sheets between diamond (111) planes and closure of the graphite layers.

关键词： onion-like carbon(OLC) nanodiamond annealing fabrication

超大截面全焊钢结构桥塔工地自动化焊接技术研究

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焊接技术 2024年第3期53卷 72-76页

作者：李彦国许子凡薛喆彦中铁宝桥扬州有限公司江苏扬州225000

常泰长江大桥主塔上塔柱钢桥塔外轮廓为八边形,桥位高空吊装后既要施焊同段块体间纵向对接焊缝,又要完成塔段间横向对接焊缝的焊接。本研究以提升钢结构桥塔桥位焊接自动化率,控制其高空作业焊接质量,并保证多塔段连续匹配安装精度为主... 详细信息

常泰长江大桥主塔上塔柱钢桥塔外轮廓为八边形,桥位高空吊装后既要施焊同段块体间纵向对接焊缝,又要完成塔段间横向对接焊缝的焊接。本研究以提升钢结构桥塔桥位焊接自动化率,控制其高空作业焊接质量,并保证多塔段连续匹配安装精度为主要目标,大幅缩短架设工期,有力推动自动化焊接工艺在钢桥塔架设中的应用,加速桥梁建造技术向绿色低碳转型。

关键词：超大截面钢结构桥塔桥位自动化焊接

A new approach to promote astaxanthin accumulation via Na_2WO_4 in Haematococcus pluvialis

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Journal of Oceanology and limnology 2019年第1期37卷 176-185页

作者： li yanguo CUI DANDan ZHUO Pinli ZHANG lin SUN Xue XU Nianjun Key Laboratory of Marine Biotechnology of Zhejiang Province School of Marine Sciences Ningbo University

The optimum concentration of Na_2 WO_4 was explored in relation to the cell density and astaxanthin content in Haematococcus pluvialis. Then, the cellular morphology, nitrate reductase(NR) activity, soluble sugar and protein contents, and chlorophyll ?uorescence were measured, and the transcriptional expression of carotenogenic genes was determined by quantitative real-time PCR. The results showed that 3.0 mmol/L of Na_2 WO_4 was the optimum concentration to induce astaxanthin accumulation, with a maximum content of 49.41±0.13 pg/cell reached on the tenth day. The NR activity decreased signi?cantly and continually after Na_2 WO_4 treatment. The soluble sugar content increased gradually during the experimental period and was eventually signi?cantly higher than that in the control. The soluble protein content increased rapidly,reached a maximum in day 0.5 and day 1 and then decreased. The ef fective photochemical effciency of PSII( F v'/F m') and light saturation( E k) ?rst decreased and then tended to stabilize, and NADP +-glyceraldehyde-3-phosphate dehydrogenase(GAPDH) gene expression was correlated with photosynthesis. The transcriptional expression of ipi, psy and bkt was signi?cantly increased compared with that in the control after application of Na_2 WO_4, and the relative expression of ipi reached the highest level on the ?fth day, with a 98.03±1.92-fold increase. Our results describe a new approach to promote the ef fective accumulation of astaxanthin in H. pluvialis by NR inhibitor Na_2 WO_4.

关键词： Haematococcus pluvialis astaxanthin Na2WO4 nitrate reductase quantitative real-time PCR

Selective hydrodeoxygenation of guaiacol to cyclohexanol using activated hydrochar-supported Ru catalysts

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Frontiers of Chemical Science and Engineering 2024年第5期18卷 13-22页

作者： Kaile li Shijie Yu Qinghai li yanguo Zhang Hui Zhou Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Beijing Key Laboratory of CO_(2) Utilization and Reduction TechnologyDepartment of Energy and Power EngineeringTsinghua UniversityBeijing 100084China Department of Chemical and Biomolecular Engineering National University of SingaporeSingapore117585Singapore

lignin,an abundant aromatic polymer in nature,has received significant attention for its potential in the production of bio-oils and chemicals owing to increased resource availability and environmental *** hydrodeoxygenation of guaiacol,a lignin-derived monomer,can produce cyclohexanol,a nylon precursor,in a carbon-negative and environmentally friendly *** study explored the porous properties and the effects of activation methods on the Ru-based catalyst supported by environmentally friendly and cost-effective *** selective cleavage of C_(ary)-O bonds was achieved under mild conditions(160°C,0.2 MPa H_(2),and 4 h),and alkali activation further improved the catalytic *** characterization methods revealedthat hydrothermal treatment and alkali activation relatively contributed to the excellent performance of the catalysts and influenced their porous structure and Ru dispersion.X-ray photoelectron spectroscopy results revealed an increased formation of metallic ruthenium,indicating the effective regulation of interaction between active sites and *** synergistic approach used in this study,involving the valorization of cellulose-derived hydrochar and the selective production of nylon precursors from lignin-derived guaiacol,indicated the comprehensive and sustainable utilization of biomass resources.

关键词： hydrochar guaiacol cyclohexanol activation full-component utilization

New possibility for PET plastic recycling by a tailored hydrolytic enzyme

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Green Energy & Environment 2024年第2期9卷 163-165页

作者： Shijie Yu Qinghai li yanguo Zhang Hui Zhou Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Beijing Key Laboratory of CO_(2)Utilization and Reduction TechnologyDepartment of Energy and Power EngineeringTsinghua UniversityBeijing 100084China

Plastic waste puts a huge burden on the ecosystem due to the current lack of mature recycling ***(ethylene terephthalate)(PET)is one of the most produced plastics in the *** decomposition holds the promise of recovering monomers from PET plastic,and the monomers can be used to regenerate new PET ***,there are still limitations in the activity and thermal stability of the existing PET *** recent study by Lu et *** a novel PET hydrolase via machine learning-aided *** obtained PET hydrolase showed excellent activity and thermal stability in the hydrolysis of PET and is capable of directly degrading large amounts of postconsumer PET *** approach provides an effective method for recycling PET waste and is expected to improve the current state of plastic pollution worldwide.

关键词： Plastic waste Poly(ethylene terephthalate) Hydrolysis Machine learning Enzymatic depolymerization Hydrolases