Energy sources

能源
  • 文章类型: Journal Article
    背景:Monochamussaltuarius是松树林的破坏性树干bore,是松树线虫(PWN)的有效传播媒介,松树枯萎病(PWD)的病原体,导致重大生态灾难。寒冷的冬季温度决定了昆虫的生存和分布。然而,关于盐藻的耐寒性和潜在的生理机制知之甚少。
    结果:我们证明了死的红松树干不能为幼虫提供绝缘。Saltuarius幼虫是耐冻物种。与大多数其他耐冻昆虫不同,他们可以通过增加过冷点来在较高的零下温度下主动冷冻细胞外液。幼虫越冬的主要能量来源是糖原和中后期转换为脂质。水平衡显示自由水的减少和结合水的少量增加。冷应激促进脂质过氧化,从而激活抗氧化系统以防止寒冷引起的氧化损伤。我们发现了与冷应激相关的8个主要途径和39个重要的代谢产物,其中十种是冷冻保护剂,包括麦芽糖,UDP-葡萄糖,d-果糖6P,半乳糖醇,dulcitol,肌醇,山梨醇,l-蛋氨酸,肌氨酸,和D-脯氨酸.Saltuarius幼虫在其体液冻结时参与双重呼吸过程,涉及厌氧和需氧途径。半胱氨酸和蛋氨酸代谢,以及丙氨酸,天冬氨酸,和谷氨酸代谢,是与抗氧化和能量生产相关的最重要的途径。
    结论:我们的研究结果可能有助于加强和补充监测的管理策略,检疫,控制这种害虫,从而有助于控制PWD的进一步传播。©2024化学工业学会。
    BACKGROUND: Monochamus saltuarius is a destructive trunk-borer of pine forest and an effective dispersal vector for pinewood nematode (PWN), a causative agent of pine wilt disease (PWD), which leads to major ecological disasters. Cold winter temperatures determine insect survival and distribution. However, little is known about the cold tolerance and potential physiological mechanisms of M. saltuarius.
    RESULTS: We demonstrated that dead Pinus koraiensis trunks do not provide larvae with insulation. The M. saltuarius larvae are freeze-tolerant species. Unlike most other freeze-tolerant insects, they can actively freeze extracellular fluid at higher subzero temperatures by increasing their supercooling points. The main energy sources for larvae overwintering are glycogen and the mid-late switch to lipid. The water balance showed a decrease in free and an increase in bound water of small magnitude. Cold stress promoted lipid peroxidation, thus activating the antioxidant system to prevent cold-induced oxidative damage. We found eight main pathways linked to cold stress and 39 important metabolites, ten of which are cryoprotectants, including maltose, UDP-glucose, d-fructose 6P, galactinol, dulcitol, inositol, sorbitol, l-methionine, sarcosine, and d-proline. The M. saltuarius larvae engage in a dual respiration process involving both anaerobic and aerobic pathways when their bodily fluids freeze. Cysteine and methionine metabolism, as well as alanine, aspartate, and glutamate metabolism, are the most important pathways linked to antioxidation and energy production.
    CONCLUSIONS: The implications of our findings may help strengthen and supplement the management strategies for monitoring, quarantine, and control of this pest, thereby contributing to controlling the further spread of PWD. © 2024 Society of Chemical Industry.
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  • 文章类型: Journal Article
    脉冲场消融(PFA)是心脏电生理学领域的创新方法,旨在治疗心律失常。与传统的导管消融能量不同,使用射频或低温热能在心脏中产生病变,PFA利用脉冲电场诱导不可逆电穿孔,导致有针对性的组织破坏。这篇最新的综述总结了PFA的生物物理原理和临床应用,突出了其相对于传统消融方法的潜在优势。讨论了当代PFA设备的临床数据,它结合了可预测的程序结果和降低的热附带损害风险。总的来说,这些技术发展推动了当代PFA导管的快速发展,未来的进步可能会影响患者的护理。
    Pulsed field ablation (PFA) is an innovative approach in the field of cardiac electrophysiology aimed at treating cardiac arrhythmias. Unlike traditional catheter ablation energies, which use radiofrequency or cryothermal energy to create lesions in the heart, PFA utilizes pulsed electric fields to induce irreversible electroporation, leading to targeted tissue destruction. This state-of-the-art review summarizes biophysical principles and clinical applications of PFA, highlighting its potential advantages over conventional ablation methods. Clinical data of contemporary PFA devices are discussed, which combine predictable procedural outcomes and a reduced risk of thermal collateral damage. Overall, these technological developments have propelled the rapid evolution of contemporary PFA catheters, with future advancements potentially impacting patient care.
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  • 文章类型: Journal Article
    先前的研究在评估发达国家和发展中国家的影响时,忽略了能源消耗对二氧化碳排放的地理空间动力学溢出效应。此外,大多数研究错误地评估了溢出效应的聚合形式,而不是分解其组成部分。这很重要,因为并非所有能源都具有相同的特性。我们通过调查各种形式的能源的溢出效应来填补文献中的这些空白,包括化石燃料,可再生能源,和核能,2000年至2019年135个发达国家和发展中国家的二氧化碳排放量。我们使用动态空间杜宾模型(DSDM)来更好地理解结果。使用DSDM模型确认了一系列指示性测试,并在分析中包括了CO2排放的空间相互作用。我们的发现表明了各种能源对CO2排放的间接溢出效应。进一步考虑到邻国能源的溢出效应,本文发现,CO2排放量的增长主要来自该国本身和邻国的能源消耗。然而,结果表明,能源消耗的直接影响往往超过其间接影响。结果还证实,总能源和化石能源的消耗危害环境,而采用可再生能源和核能可以减少二氧化碳排放。最后,我们发现核能是环境最可持续的能源。研究得出的结论是,动态空间杜宾模型在估算样本中能源消耗对环境的影响方面至关重要。从这项研究中得出的实际政策含义可用于促进加强合作,以加快能源转型进程并应对全球变暖和气候变化。
    Previous studies ignored the geospatial dynamics spillover effects of energy consumption on CO2 emissions while assessing such impacts in developed and developing countries. Moreover, most studies wrongfully assess spillover effects in its aggregated format rather than decomposing by its components. This is important as not all energy sources share the same characteristics. We fill these gaps in the literature by investigating the spillover effects of various forms of energy, including fossil fuels, renewable energy, and nuclear power, on CO2 emissions in 135 developed and developing countries from 2000 to 2019. We used the Dynamic Spatial Durbin Model (DSDM) to better understand the results. A series of indicative tests confirmed using the DSDM model and including spatial interaction of CO2 emissions in the analysis. Our findings show evidence of indirect spillover effects of the various energy sources on CO2 emissions. Further considering the spillover effects of the energy sources of neighbouring countries, the paper finds that the driving increase in CO2 emissions mainly came from the energy consumption of the country itself and neighbouring countries\' energy consumption. Nevertheless, the results indicate that the direct effects of energy consumption often exceed its indirect effects. The results also confirm that total and fossil energy consumption harms the environment, whereas adopting renewable and nuclear energy sources reduces CO2 emissions. Lastly, we find nuclear energy is the most environmentally sustainable energy source. The study concludes that the Dynamic Spatial Durbin Model is paramount in estimating the environmental impact of energy consumption in our sample. The practical policy implications drawn from this study could be used to promote increased collaboration to hasten the energy transition process and address global warming and climate change.
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  • 文章类型: Journal Article
    人类社会一直在努力减轻身体受损者的痛苦,在上个世纪的特殊努力。在1950年代,一个新概念出现了,发现动物外骨骼之间的相似性,并以医学上帮助人类运动(用于康复应用)为目标。考虑到这个目的,已经有一些关于使用机械护甲的研究。所以,当前的审查提供了一个关键的观点,并详细分析了外骨骼概念中涉及的步骤和关键决策。诸如设计方面的选择,基础材料(结构),致动器(力和运动),能源(致动),和控制系统将被讨论,指出它们的优点和缺点。此外,运动服的例子(全身,上身,和下身设备)将被呈现和描述,包括他们的用例和结果。将讨论外骨骼作为可能的辅助运动解决方案的未来-指出康复的最佳选择。
    Human societies have been trying to mitigate the suffering of individuals with physical impairments, with a special effort in the last century. In the 1950s, a new concept arose, finding similarities between animal exoskeletons, and with the goal of medically aiding human movement (for rehabilitation applications). There have been several studies on using exosuits with this purpose in mind. So, the current review offers a critical perspective and a detailed analysis of the steps and key decisions involved in the conception of an exoskeleton. Choices such as design aspects, base materials (structure), actuators (force and motion), energy sources (actuation), and control systems will be discussed, pointing out their advantages and disadvantages. Moreover, examples of exosuits (full-body, upper-body, and lower-body devices) will be presented and described, including their use cases and outcomes. The future of exoskeletons as possible assisted movement solutions will be discussed-pointing to the best options for rehabilitation.
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  • 文章类型: Journal Article
    在牛中使用电解质溶液长时间连续通过鼻-瘤胃途径进行的肠内液体治疗是安全有效的。这项研究的目的是对含有丙酸钙的维持肠内电解质溶液进行比较评估,在牛中连续流动施用丙二醇或甘油。使用了六只小母牛,并以6×3的交叉设计进行了研究,其中每只动物接受三种不同的治疗:含有丙酸钙的肠内电解质溶液(ESCaP),含有甘油(ESGly)的肠内电解质溶液和含有丙二醇(ESPrG)的肠内电解质溶液。以15mLkg-1h-1的速率给药溶液12h。血清和尿生化评估;尿量,pH值,和比重;在0、3、6、9、12和24小时测量血气分析。所有三种肠内电解质溶液都扩大了血容量,增加了尿量,而没有引起电解质失衡。ESCaP引起轻度可逆性代谢性碱中毒,而在含有丙二醇(ESPrG)和丙酸钙(ESCaP)的电解质溶液中观察到最明显的血糖潜能。
    Enteral fluid therapy administered in continuous flow through the naso-ruminal route for long periods with electrolyte solutions is safe and effective in cattle. The aim of this study was to carry out a comparative assessment between maintenance enteral electrolyte solutions containing calcium propionate, propylene glycol or glycerol administered in continuous flow in cattle. Six heifers were used and the study was carried out in a 6 × 3 crossover design, in which each animal received three different treatments: enteral electrolyte solution containing calcium propionate (ESCaP), enteral electrolyte solution containing glycerol (ESGly) and enteral electrolyte solution containing propylene glycol (ESPrG). Solutions were administered at a rate of 15 mL kg-1 h-1 for 12 h. Serum and urinary biochemical assessment; urinary volume, pH, and specific gravity; and blood gas analysis were measured at 0, 3, 6, 9, 12, and 24 h. All three enteral electrolyte solutions expanded blood volume and increased urine volume without causing electrolyte imbalances. ESCaP caused mild reversible metabolic alkalosis while the most significant glycemic potential was observed in electrolyte solutions containing propylene glycol (ESPrG) and calcium propionate (ESCaP).
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  • 文章类型: Journal Article
    本试验研究旨在通过提取违禁材料,开发一条从RDF生产SRF的生产线,研磨,和干燥,并评估了在水泥工业中使用SRF作为替代燃料的能源潜力。本文定义了RDF的主要特点,在MBT工厂从MSW中分离生物部分后获得。根据其特点,RDF只能用于在CPP中进行焚烧以获得热量和能量。所产生的SRF满足来自废物的燃料的要求并且可以用作熟料燃烧的替代燃料。通过在现有的MBT生产线上增加技术单元,开发了从RDF生产SRF的工艺流程线。SRF生产线产率计算为4.47t/h。在SRF生产过程结束时,成品的水分含量下降了85%,数量减少了18%。得到的SRF热值高,低水分含量,以及氯和汞的允许值。有人提出将产生的SRF和污水污泥(已经在熟料燃烧过程中使用)用作替代燃料,因为它们对应于最终熟料的元素和氧化物组成的氧化物组成。进行了评估在水泥窑中使用SRF的经济和环境效率的计算。结果表明,使用10%SRF作为1.92t/h熟料焙烧所用煤的替代燃料,可节省601.7USD/h的煤炭成本。使用SRF将排放3.7t/h的二氧化碳,净节省754.7美元/小时。
    This pilot study aimed to develop a production line for SRF production from RDF by extracting prohibited materials, grinding, and drying, and the energy potential for using SRF in the cement industry as an alternative fuel was evaluated. This paper defined the main characteristics of RDF, which were obtained after the separation of the biological fraction from MSW at an MBT plant. According to its characteristics, RDF can only be used for incineration in the CPP to obtain heat and energy. The produced SRF meets the requirements for fuel from waste and can be used as an alternative fuel for clinker firing. A technological process line for SRF production from RDF has been developed by adding technical units to the existing MBT line. The SRF production line yield was calculated as 4.47 t/h. At the end of the SRF production process, the moisture content of the finished product decreased by 85%, and the volume decreased by 18%. The obtained SRF had a high calorific value, low moisture content, and a permissible value of chlorine and mercury. It was proposed that the produced SRF and sewage sludge (already used during the clinker firing process) be utilized as alternative fuels since they correspond to the oxide composition of the finished clinker in elemental and oxide composition. A calculation to assess the economic and environmental efficiency of the use of SRF in the cement kiln was conducted. The result showed that using 10% SRF as a substitute fuel for coal used in clinker roasting at 1.92 t/h would save 601.7 USD/h coal costs. This use of SRF will emit 3.7 t/h CO2 and achieve net savings of 754.7 USD/h.
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  • 文章类型: Journal Article
    专家高度一致认为,如果不在全球范围内采取紧急和重大的减少碳排放的措施,人为气候变化将是灾难性的。澳大利亚是世界领先的煤炭和天然气出口国,并且没有有效的减排策略。尽管许多澳大利亚人支持气候变化行动,这并没有影响投票模式。在这项定性研究中,我们的目标是探索澳大利亚选民在布里斯班的态度,昆士兰,澳大利亚对潜在的环境政策。我们在公共场所接触了人们,并邀请他们参加面试。投票支持两个主要政党或未定选民的35名采访参与者中,有6人同意向澳大利亚100%可再生能源和/或没有新煤矿的过渡。许多人认为可再生能源不够可靠,或者经济过于依赖煤炭而无法实现转型。为了规范采矿和污染,强烈支持政治领导,以及为依赖化石燃料的社区制定过渡计划。与会者最关心的是有形的环境问题,比如废物和污染,并描述了需要明确的解决方案才能解决问题。一些人描述了抗议和有关气候变化和环境问题的信息。我们的研究结果表明,基于解决方案的消息传递可能会增加对气候变化的参与程度,废物和污染可以成为讨论气候变化的切入点。与人们就这个重要问题进行对话很重要。
    There is a high degree of expert consensus that anthropogenic climate change will be catastrophic if urgent and significant measures to reduce carbon emissions are not undertaken worldwide. Australia is a world-leading exporter of coal and gas, and does not have an effective emissions reduction strategy. Though many Australians support action on climate change, this has not affected voting patterns. In this qualitative study, we aimed to explore the attitudes of Australian voters in Brisbane, Queensland, Australia towards potential environmental policies. We approached people in public spaces, and invited them to participate in interviews. Six of the thirty-five interview participants who voted for the two main political parties or were undecided voters agreed with the transition to 100% renewables and/or no new coal mines in Australia. Many thought that renewables were not reliable enough and/or the economy was too dependent on coal to make the transition. There was strong support for political leadership in order to regulate mining and pollution, and for a transition plan for fossil-fuel-dependent communities. Participants were most concerned about tangible environmental issues, such as waste and pollution, and also described needing clear solutions in order to engage with the issues. Some described feeling \'shouted at\' by protests and messaging about climate change and environmental issues. Our findings suggest that solution-based messaging may increase levels of engagement about climate change, and that waste and pollution can be entry-points for discussions about climate change. It is important to have conversations with people about this important issue.
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  • 文章类型: Journal Article
    据报道,许多微生物可以降解环境和植物中的有机污染物,然而,关于有机污染物对微生物代谢影响的具体信息研究甚少。在本研究中,使用代谢组学研究了农药毒死蜱对巨大芽孢杆菌RRB代谢谱的影响。我们的数据表明,作为能源的毒死rif很容易从培养基中浓缩到菌株RRB中。在早期种植期间,从胰蛋白酶大豆肉汤到毒死蜱的能量来源转移可能会暂时导致菌株RRB进入饥饿阶段,其中TCA循环和吡哆醇代谢途径中一些与合成相关的氨基酸和中间体减少。核苷酸和赖氨酸的增加可能有助于菌株RRB应对饥饿阶段。在以后的种植中,许多代谢物包括有机酸,核苷和糖磷酸盐逐渐积累,这表明毒死rif可以被染色剂RRB利用来产生所需的代谢产物细菌。此外,随着后期的培养,作为氮储存氨基酸的精氨酸逐渐减少,表明毒死蜱不能为细菌提供足够的氮。
    Many microorganisms have been reported to degrade organic pollutants in the environment and plants, however, the specific information about the effect of organic pollutants on the metabolism of microorganisms is poorly investigated. In the present study, the effect of the pesticide chlorpyrifos on the metabolic profiling of Bacillus megaterium strain RRB was investigated using metabolomics. Our data show that chlorpyrifos acting as an energy source was readily concentrated in the strain RRB from the culture medium. During early cultivation, the shift in energy sources from tryptic soy broth to chlorpyrifos may temporarily cause the strain RRB to enter the starvation stage, where some synthesis-related amino acids and intermediates in the pathways of TCA cycle and pyridoxine metabolism were decreased. The increase of nucleotides and lysine may help the strain RRB cope with the starvation stage. During later cultivation, many metabolites including organic acids, nucleosides and sugar phosphates were gradually accumulated, which indicates that chlorpyrifos could be utilized by the stain RRB to generate metabolites bacteria needed. In addition, arginine acting as a nitrogen-storage amino acid was gradually decreased with later cultivation, suggesting that chlorpyrifos could not provide enough nitrogen for bacteria.
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  • 文章类型: Journal Article
    Adequate, uninterrupted, and environment-friendly energy practices are indispensable for maintaining the quality environment and the health of the households in most developing countries, like Ethiopia. However, for the successful implementation of adequate energy options, the preferences of households should be taken into consideration. The main aim of this study was to analyze the determinants of rural household preferences in transitions from traditional to renewable energy sources and estimate the WTP for various energy alternatives. The study is based on the data collected in 2019 from 212 randomly drawn respondents living in the North Gondar zone. The key result from the descriptive statistics revealed that hydropower was the most preferred with the highest average WTP, 36.86 per month by households\' followed by solar energy and transitional fuels. Therefore, the total average WTP of hydropower for the surveyed respondents becomes 93,771.86 per year in the study area. This considerable amount of money implies that households are willing to share the cost of providing renewable energy services. Results of the multinomial logit model revealed that the majority of the sampled households preferred and support the transition from conventional to cleaner energy sources. The results further indicated socioeconomic characteristics of the respondents such as age, family size; income, education, and credit facility were the determining factors of households\' fuel choices to satisfy daily energy demand. In this study, an inconclusive result was investigated on the relationship between income and adoption of improved energy sources. Generally, the finding showed that analyzing households\' preferences is very important to prioritize among alternatives for the implementation of good energy services. In closing, to achieve adequate energy options, it is recommended that any concerned body takes into account households\' preferences and WTP for the successful implementation of sound energy use practices and creates opportunities that can facilitate the use and advancement of better energy options.
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  • 文章类型: Journal Article
    The aim of the present study was to analyze the supply of energy, 19 nutrients, free sugars, and dietary fiber in the average Polish diet from fruit and fruit products. Our analysis is based on 2016 data from the national representative household budget survey conducted on a sample of 36,886 households, yielding a population of 99,230 individuals. Fruit and fruit products provided 3.12% of energy to the average diet in Poland with the highest share of bananas and apples. The highest significance of this food group was found for vitamin C (23.65%), including citrus fruits providing 8.03% of vitamin C, berries (5.97%), other fruits (3.45%), and apples (3.13%). The share of fruit and their products in the supply of free sugars is equally high and amounts to 23.52%. This means that apples provide 6.34% of free sugars, while other fruits also have a high supply of free sugars, including berries 3.68%, stone fruits 3.06%, bananas 2.56%, and citrus fruits 2.54%. The proportion of supply exceeding the percentage of energy (which was 3.12%) was obtained for carbohydrate (5.79%), and fiber (13.66%). The food group studied was particularly important (more than 5% share) in providing four minerals: potassium (8.59%), iron (5.07%), magnesium (5.51%), copper (8.81%), and three vitamins: vitamin C (23.65%), vitamin B6 (5.74%), and vitamin E (5.53%). The influence of sociodemographic and economic characteristics of households on the structure of energy and nutrient supply from fruit and fruit products was assessed using cluster analysis. There were four clusters characterized by different energy, nutrient, and fiber supply. The factors with the highest statistical significance on the supply of energy, nutrients, and fiber from fruit and fruit products were month of study, income, degree of urbanization, education, size of town, and land use. The obtained results concerning energy and nutrient supply from fruits and fruit products are important for the Polish society from the public health point of view, as indicated in the discussion of results and conclusions.
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