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Optimization of the methane production in batch anaerobic digestion of maize straw by adjustment of total solid and substrate-to-inoculum ratio based on kinetics

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International Journal of Agricultural and Biological Engineering 2024年第1期17卷 225-231页

作者： Feng Zhen Tao Xing lianhua li Yongming Sun Hongqiong Zhang Guangzhou Institute of Energy Conversion Chinese Academy of SciencesGuangzhou 510640China Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development Guangzhou 510640China College of Engineering Northeast Agricultural UniversityHarbin 150030China

Anaerobic digestion(AD)operating under conditions of organic overload stress typically exacerbates the potential for process instability,thereby resulting in significant economic and ecological *** this investigation,an augmented substrate-to-inoculum ratio(S/I)along with varying total solid content(TS)levels was employed to replicate diverse organic loadings,utilizing maize straw and cattle *** findings reveal that a moderate augmentation in S/I and TS proves advantageous in augmenting methane yield,while an excessive substrate loading diminishes methane yield,hampers the kinetics of methane production,and even induces severe process *** study also displayed the variation of the model parameters for the first-order model,the modified Gompertze model,and the transfer function *** the modified Gompertze model and transfer function model exhibited the same environmental stress ***,both the increase in particulate content and the increase in S/I had a substantial effect on the substrate conversion rate to *** analysis demonstrates the dominant influence of Firmicutes and Methanosarcina under different organic loading *** both a kinetic and a microbiological point of view,this work provides novel insights into the fundamental processes that regulate anaerobic digestion(AD)under varying loading ***,it has significant implications for improving the operating efficiency of AD,which is a significant benefit.

关键词： maize straw dry anaerobic digestion methane production microbial characteristics kinetic model

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Mechanisms of hyponatremia and diabetes insipidus after acute spinal cord injury:a critical review

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Chinese Neurosurgical Journal 2024年第1期10卷 42-47页

作者： lianhua li Yanhui Guo Chen Chen Zhonghe Wang Zhi liu Department of Orthopedics the Fourth Medical Center of PLA General HospitalBeijingChina

The incidence of hyponatremia after spinal cord injury was reported to be between 25 and 80%.Hyponatremia can lead to a variety of clinical symptoms,from mild to severe and even *** is often associated with diabetes insipidus,which refers to insufficient arginine vasopressin(AVP)secretion or defective renal response to AVP,with clinical manifestations of syndromes such as hypoosmolality,polydipsia,and *** mechanistic studies on hyponatremia and diabetes insipidus after acute spinal cord injury have been performed in isolation,without integrating the above two symptoms into different pathological manifestations that occur in the same injury state and without considering the acute spinal cord injury patient’s condition as a *** therapeutic principles of CSWS and SIADH are in opposition to one *** is not easy to identify the mechanism of hyponatremia in clinical practice,which makes selecting the treatment *** to the existing theories,treatments for hyponatremia and diabetes insipidus together are contraindicated,whether the mechanism of hyponatremia is thought to be CSWS or *** this paper,we review the mechanism of these two pathological manifestations and suggest that our current understanding of the mechanisms of hyponatremia and diabetes insipidus after high acute cervical SCI is insufficient,and it is likely that there are other undetected pathogenetic mechanisms.

关键词： Mechanism Hyponatremia Diabetes insipidus Spinal cord injury

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智慧社区养老监护系统

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无线互联科技 2024年第15期21卷 52-56页

作者：黎莲花陆思翰桂林电子科技大学广西桂林541004 东莞远峰科技股份有限公司广东东莞523000

为解决社区老人健康管理和安全监测等问题,文章设计并实现了智慧社区养老监护系统。该系统通过室内检测传感器,有效地监测室内环境和全屋用水情况,通过手环实时检测老人的身体姿态、判断老人是否摔倒、检测老人的心率血氧。通过下位机、... 详细信息

为解决社区老人健康管理和安全监测等问题,文章设计并实现了智慧社区养老监护系统。该系统通过室内检测传感器,有效地监测室内环境和全屋用水情况,通过手环实时检测老人的身体姿态、判断老人是否摔倒、检测老人的心率血氧。通过下位机、EMQX云平台、PYQT上位机相结合,打造了功能丰富、操作简单的智慧社区养老监护系统。

关键词：心率血氧姿态智慧社区养老

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双层波纹钢板混凝土组合剪力墙抗震性能研究

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广东建材 2024年第9期40卷 141-145页

作者：李莲花汪小平魏祎旸颜卓琦江西理工大学江西省环境岩土与工程灾害控制重点实验室

利用有限元软件ABAQUS分别建立平钢板混凝土组合剪力墙与双层波纹钢板混凝土组合剪力墙有限元模型,对2种钢板混凝土组合剪力墙在低周往复荷载作用下的受力机制及滞回性能进行对比分析,验证波纹钢板代替平钢板的合理性。通过对4种波纹尺... 详细信息

利用有限元软件ABAQUS分别建立平钢板混凝土组合剪力墙与双层波纹钢板混凝土组合剪力墙有限元模型,对2种钢板混凝土组合剪力墙在低周往复荷载作用下的受力机制及滞回性能进行对比分析,验证波纹钢板代替平钢板的合理性。通过对4种波纹尺寸不同的钢板混凝土组合剪力墙进行对比分析,研究波纹直径与波幅对组合墙体抗震性能的影响规律。结果表明:将波纹钢板代替平钢板,能显著提升墙体的承载能力、耗能能力与整体刚度。波纹直径较小、钢板波折次数较多的组合剪力墙承载能力更强;波纹直径较大、钢板波折次数较少的组合剪力墙整体刚度较强。波幅等于半径的波纹钢板剪力墙具有更强的承载能力和耗能能力,整体抗震性能较好。

关键词：组合剪力墙波纹钢板抗震性能低周往复荷载

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中药自动抓配系统的设计

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现代信息科技 2024年第14期8卷 172-176页

作者：张存毅黎莲花唐凯康吕龙楚曾瑞涛桂林电子科技大学电子工程与自动化学院广西桂林541004

随着中医药的发展,中药文化在传统医学体系中扮演着重要的角色,为了解决医药医生抓配中药困难的问题,设计了一款基于STM32的中药抓配系统。设备上位机接收医生开出的药单,通过串口通信下发指令给抓配设备的主控,抓药设备根据接收的指令... 详细信息

随着中医药的发展,中药文化在传统医学体系中扮演着重要的角色,为了解决医药医生抓配中药困难的问题,设计了一款基于STM32的中药抓配系统。设备上位机接收医生开出的药单,通过串口通信下发指令给抓配设备的主控,抓药设备根据接收的指令,控制药柜前的横向与纵向步进电机、称重传感器等设备,实现对中药材的自动抓配。医生通过上位机对中药抓配过程进行远程监控。该系统通过数字化、智能化的手段,提高了中药抓配的精准性和效率,也促进了中医药的传统文化与现代科技的融合。

关键词：自动出药动态称量自动抓药系统 STM32 中药

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Cu-Zn isotope compositions of hydrothermal sediments from the southern Mid-Atlantic Ridge:implications to the sediment formation and mineral exploration

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Journal of Oceanology and limnology 2024年第5期42卷 1470-1485页

作者： Baoju YANG lianhua HE Chuanshun li Qiannan HU Bingfu JIN Jihua liU School of Resources and Environmental Engineering Ludong UniversityYantai 264025China Key Laboratory of Marine Geology and Metallogeny First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China College of Earth Science and Engineering Shandong University of Science and TechnologyQingdao 266590China

Six hydrothermal sediment samples were collected from the Xunmei and Tongguan hydrothermal fields along the southern Mid-Atlantic Ridge during the China Ocean Cruise DY46 in *** and oxides in the samples were separated,and Cu and Zn isotope compositions were *** show that the ranges ofδ^(65)Cu values of the bulk sediments,sulfides,and oxides were 0.36‰-2.46‰,-0.21‰-1.10‰,and 0.68‰-1.52‰,***δ^(65)Cu values of sulfides in four samples(46II-14,46II-30,46III-06,and 46II-09)were relatively low(-0.21‰-0.50‰),corresponding to theδ^(65)Cu values of sulfides from inactive old hydrothermal chimneys in northern Mid-Atlantic Ridge(n MAR),suggesting that the sulfides in the sediments were originated from collapsed dead chimney *** theδ^(65)Cu values of the other two samples(46III-02 and 46III-08)were relatively high(1.10‰-0.96‰),corresponding to theδ^(65)Cu values for active hydrothermal chimneys sulfides in n MAR,which indicated that the sulfides in these two samples might mainly come from sulfide particles settled from active hydrothermal *** of the high density of sulfide particles,they tended to settle near the hydrothermal vents ***,highδ^(65)Cu values of sulfides in 46III-02 and 46III-08 implied that undiscovered active hydrothermal vents near the sampling positions of 46III-02 in the Xunmei hydrothermal field and 46III-08 in the Tongguan hydrothermal ***δ^(66)Zn values of hydrothermal sediments and sulfides ranged 0.11‰-0.43‰and 0.29‰-0.67‰,*** the four samples from the Xunmei hydrothermal field,a positive correlation was found between the distance of the sampling position from sulfide mineralized spot and the Zn isotopic ratio,showing that the greater the distance from the mineralized spot,the heavier the Zn isotope composition as seen in two samples(46II-30 and 46II-14)of the Xunmei-3 *** result aligned with the findings of Wilkinson et al.(2005)and Baumgartner et al.(2023),sugges

关键词： Cu-Zn isotope hydrothermal sediments mineral exploration southern Mid-Atlantic Ridge

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Old Pinus massoniana forests benefit more from recent rapid warming in humid subtropical areas of central-southern China

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Journal of Forestry Research 2024年第5期35卷 155-170页

作者： Wenxin li liangjun Zhu lianhua Zhu Mengdan Jing Censhi Qian Yu Zhu Paolo Cherubini College of life Science and Technology Central South University of Forestry and TechnologyChangsha 410004People’s Republic of China Swiss Federal Institute for Forest Snow and Landscape Research WSL8903 BirmensdorfSwitzerland Department of Forest and Conservation Sciences Faculty of ForestryUniversity of British Columbia2004-2424 Main MallVancouverBC V6T 1Z4Canada

Trees progress through various growth stages,each marked by specific responses and adaptation strate-gies to environmental *** the importance of age-related growth responses on overall forest health and management policies,limited knowledge exists regarding age-related effects on dendroclimatic relationships in key subtropical tree *** this study,we employed a den-drochronological method to examine the impact of rapid warming on growth dynamics and climatic sensitivity of young(40–60 years)and old(100–180 years)Pinus mas-soniana forests across six sites in central-southern *** normalized log basal area increment of trees in both age groups increased significantly following rapid warming in *** in young forests further showed a distinct growth decline during a prolonged severe drought(2004–2013),whereas those in old forests maintained growth *** growth was more strongly influenced by temperature than by moisture,particularly in old *** tem-peratures strongly and positively impacted the growth of old trees but had a weaker effect on young *** forests had a significantly lower resistance to extreme drought but faster recovery compared to young ***“divergence problem”was more pronounced in younger forests due to their heightened sensitivity to warming-induced drought and heat *** ongoing warming,young forests also may initially experience a growth decline due to their heightened sensitivity to winter *** findings underscore the importance of considering age-dependent changes in forest/tree growth response to warming in subtropical forest man-agement,particularly in the context of achieving“Carbon Peak&Carbon Neutrality”goals in China.

关键词： Tree rings Pinus massoniana Age effects Drought resilience Subtropical forests Rapid warming

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基于lncRNA TUG1介导miR-320调控PTEN/Cosmc通路探讨肾炎止血丸治疗IgA肾病的作用机制

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中国中医药科技 2024年第3期31卷 391-396页

作者：陈瑶张永刚闫晓明王海艳李莲花张佩青陈明黑龙江省中医药科学院黑龙江哈尔滨150036 齐齐哈尔市第一医院黑龙江齐齐哈尔161005

目的:观察肾炎止血丸对IgA肾病(IgAN)模型大鼠的治疗作用及其对lncRNA TUG1介导miR-320-5p调控PTEN/Cosmc通路的影响。方法:采用“牛血清白蛋白+四氯化碳+脂多糖”联用法构建IgAN大鼠模型,32只大鼠随机分为正常对照组、模型组、氯沙坦... 详细信息

目的:观察肾炎止血丸对IgA肾病(IgAN)模型大鼠的治疗作用及其对lncRNA TUG1介导miR-320-5p调控PTEN/Cosmc通路的影响。方法:采用“牛血清白蛋白+四氯化碳+脂多糖”联用法构建IgAN大鼠模型,32只大鼠随机分为正常对照组、模型组、氯沙坦钾片组[20 mg/(kg·d)]、肾炎止血丸组[3.6 g/(kg·d)],每组8只,均连续给药6周。留取血液、肠黏膜及肾组织标本,分别应用EliSA法检测血清磷酸酶及张力蛋白同源基因(PTEN)、核心1β1,3半乳糖基转移酶伴侣蛋白(Cosmc)、半乳糖缺陷型IgA1(Gd-IgA1)水平;采用Real-time PCR、Western blot检测肠黏膜组织、肾脏组织lncRNA TUG1、miR-320、PTEN、Cosmc mRNA及蛋白表达。结果:①血清PTEN、Cosmc、Gd-IgA1:与模型组比较,各给药组PTEN、Cosmc升高明显(均P0.05)。各给药组肾组织Cosmc表达升高有极显著差异(P<0.01),与氯沙坦钾片组比较,肾炎止血丸肾组织PTEN升高有显著差异(P<0.05),Cosmc表达升高有极显著性差异(P<0.01)。结论:肾炎止血丸能够改善IgAN大鼠肾损伤;其作用机制可能与参与lncRNA TUG1介导miR-320调控PTEN/Cosmc通路有关。

关键词：肾炎止血丸 IgA肾病 lncRNA TUG1 miR-320 PTEN Cosmc 大鼠

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