检索结果-内蒙古大学图书馆

2nd International Conference on Energy, environmental and Information System, ICENIS 2017

作者： Syafrudin Nugraha, Winardi Dwi Agnesia, Shandy Sarima Matin, Hashfi Hawali Abdul Budiyono Department of Environmental Engineering Faculty of Engineering Diponegoro University Semarang Indonesia Master Program of Environmental Science School of Postgraduate Studies Diponegoro University Semarang Indonesia Department of Chemical Engineering Faculty of Engineering Diponegoro University Semarang Indonesia

Biogas is a renewable energy source that can be used as an alternative fuel to replace fossil fuel such as oil and natural gas. This research aims to analyze the impact of NaOH (Sodium hydroxide) and enzyme usage on the production of rice husk biogas using Solid State Anaerobic Digestion (SS-AD). Generally, SS-AD occurs at solid concentrations higher than 15%. The waste of rice husk are used as substrate with a C/N ratio of 25% and the total of solid that are used is 21%. Rice husk contains high lignin, therefore it is handled with chemical and biological treatment. The chemical preliminary treatment was using NaOH with various concentrations from 3%, 6% and 9% while the biological preliminary treatment was using enzyme with various concentration from 5%, 8%, and 11%. The biogas that is produced then measured every two days during 60 days of research with the biogas volume as a parameter observed. The result of the research shows that preliminary treatment with NaOH and enzyme can increase the production of biogas. The highest biogas production was obtained by the NaOH pretreatment using 6% NaOH which was 497 ml and by enzyme pretreatment using 11% enzyme which was 667,5 ml. © 2018 The Authors, published by EDP sciences.

关键词： Biogas

来源：评论

学校读者我要写书评

暂无评论

Decreasing of BOD Concentration on Artificial Domestic Wastewater Using Anaerob Biofilter Reactor Technology 2

Decreasing of BOD Concentration on Artificial Domestic Waste...

引用

2nd International Conference on Energy, environmental and Information System, ICENIS 2017

作者： Sumiyati, Sri Purwanto, P. Sudarno, S. Doctoral Program of Environmental Science School of Postgraduate Studies Diponegoro University Semarang Indonesia Department of Chemical Engineering Faculty of Engineering Diponegoro University Semarang Indonesia Department of Environmental Engineering Faculty of Engineering Diponegoro University Semarang Indonesia

Pollution of domestic wastewater becomes an urban problem. Domestic wastewater contains a variety of pollutants. One of the pollutant parameters in domestic wastewater is BOD. Domestic wastewater which BOD concentrations exceeding the quality standard will be harmful to the environment, particularly the receiving water body. Therefore, before being discharged into the environment, domestic wastewater needs to be processed first. One of the processing that has high efficiency, low cost and easy operation is biofilter technology. The purpose of this research was to analyze the efficiency of BOD concentration reduction in domestic wastewater with anaerobic reactor biofilter using volcanic gravel media. The type of reactor used is an anaerobic biofilter made of glass which volume of 30 liters while the biofilter media is volcanic gravel. In this research the established HRT were 24, 12, 6 and 3 hours. The results showed that the efficiency of BOD concentration reduction in artificial domestic wastewater reached 80%. © 2018 The Authors, published by EDP sciences.

关键词： Volcanoes

来源：评论

学校读者我要写书评

暂无评论

Anti-Inflammatory and Antimicrobial Effects ofEucalyptusspp. Essential Oils: A Potential Valuable Use for an Industry Byproduct

引用

Evidence-Based Complementary and Alternative Medicine 2023年第1期2023卷

作者： Emilly S. Salvatori Letícia V. Morgan Samara Ferrarini Gabriela A. L. Zilli Adriano Rosina Manuelle O. P. Almeida Helen C. S. Hackbart Renan S. Rezende Daniel Albeny-Simões J. Vladimir Oliveira Adriana Gasparetto Liz G. Müller Jacir Dal Magro School of Health Community University of Chapecó Region (Unochapecó) Chapecó SC Brazilunochapeco.edu.br Graduate Program in Environmental Sciences Community University of Chapecó Region (Unochapecó) Chapecó SC Brazilunochapeco.edu.br School of Agriculture and Environment Community University of Chapecó Region (Unochapecó) Chapecó SC Brazilunochapeco.edu.br Graduate Program in Food Science Technology UFPel Pelotas RS Brazilufpel.edu.br Department of Chemical and Food Engineering UFSC Florianópolis SC Brazilufsc.br

In Brazil, the use of Eucalyptus is focused on the production of wood or pulp for the paper industry but without any general recovery of waste, with leaves and branches being left on the ground. One possibility is to use these residues as raw materials in the production of industrially relevant and value-added compounds such as essential oil. The aim of the present study was to investigate the chemical composition, yield, anti-inflammatory/antinociceptive activities, and acute toxicity in mice, as well as the antimicrobial effects of essential oils from the leaves of 7 varieties of Eucalyptus and hybrids against Escherichia coli , Staphylococcus aureus, and Candida albicans . The extraction of oils was carried out using hydrodistillation, and they were analyzed by gas chromatography coupled to mass spectrometry. Urocam and Grancam were the plants that obtained the highest oil yield, with yields of 3.32 and 2.30%, respectively. The main chemical components identified in these plants were 1.8 cineole and α -pinene. The antinociceptive effect of the 7 oils (50 mg/kg, p.o.) was initially assessed in the acetic acid-induced writhing test. In this assay, a significant ( p < 0.05) antinociceptive/anti-inflammatory effect was observed from 4 tested essential oils ( E. benthamii, E. saligna, and the hybrids Urocam and Grancam) when compared to the vehicle-treated group. This effect was then confirmed in the formalin-induced paw licking test. No toxicological effects or alterations were observed in motor coordination after the administration of the studied oils to the animals. In the antimicrobial evaluation, the seven essential oils inhibited the growth of S. aureus, E. coli , and C. albicans at different concentrations. Collectively, these results demonstrate that the essential oil from the leaves and branches of Eucalyptus species and varieties present potential biomedical applications and represent a source of antimicrobial and/or anti-inflammatory compounds.

关键词：

来源：评论

学校读者我要写书评

暂无评论

6 nm super-resolution optical transmission and scattering spectroscopic imaging of carbon nanotubes using a nanometer-scale white light source

arXiv

引用

arXiv 2020年

作者： Ma, Xuezhi Liu, Qiushi Yu, Ning Xu, Da Kim, Sanggon Liu, Zebin Jiang, Kaili Wong, Bryan Yan, Ruoxue Liu, Ming Department of Electrical and Computer Engineering University of California - Riverside RiversideCA92521 United States Department of Chemical and Environmental Engineering University of California - Riverside RiversideCA92521 United States State Key Laboratory of Low Dimensional Quantum Physics Department of Physics Tsinghua University Beijing100084 China Materials Science and Engineering program University of California - Riverside RiversideCA92521 United States

Optical transmission and scattering spectroscopic microscopy at the visible and adjacent wavelengths denote one of the most informative and inclusive characterization methods in material research. Unfortunately, restricted by the diffraction limit of light, it cannot resolve the nanoscale variation in light absorption and scattering, diagnostics of the local inhomogeneity in material structure and properties. Moreover, a large quantity of nanomaterials has anisotropic optical properties that are appealing yet hard to characterize through conventional optical methods. There is an increasing demand to extend the optical hyperspectral imaging into the nanometer length scale. In this work, we report a super-resolution hyperspectral imaging technique that uses a nanoscale white light source generated by superfocusing the light from a tungsten-halogen lamp to simultaneously obtain optical transmission and scattering spectroscopic images. A 6-nm spatial resolution in the visible to near-infrared wavelength regime (415 - 980 nm) is demonstrated on an individual single-walled carbon nanotube (SW-CNT). Both the longitudinal and transverse optical electronic transitions are measured, and the SW-CNT chiral indices can be identified. The band structure modulation in a SW-CNT through strain engineering is mapped. Copyright © 2020, The Authors. All rights reserved.

关键词： Optical resolving power

来源：评论

学校读者我要写书评

暂无评论

An optimized disease resistance gene cloning workflow for wheat

引用

Nature Communications 2025年第1期16卷 1-8页

作者： Wang, Yajun Wang, Xiaodong Zhang, Lu Zhakupova, Kymbat Ayala, Francisco Ouyang, Yi Lu, Jing Athiyannan, Naveenkumar Wulff, Brande B. H. Krattinger, Simon G. Plant Science Program Biological and Environmental Science and Engineering Division King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia State Key Laboratory of Plant Trait Design CAS Centre for Excellence in Molecular Plant Sciences Shanghai Institute of Plant Physiology and Ecology Chinese Academy of Sciences Shanghai China State Key Laboratory for Crop Stress Resistance and High-Efficiency Production and College of Plant Protection Northwest A & F University Shaanxi Yangling China Chengdu Institute of Biology Chinese Academy of Sciences Chengdu China Departamento de Ingeniería Genética Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional Unidad Irapuato Irapuato Mexico

The cloning of disease resistance genes in wheat has been disproportionately slow, tedious and costly because of the large and complex genome. Wheat gene cloning projects in the late 1990s and early 2000s were multi-year endeavors, often spanning a decade or longer. The development of genomics-assisted gene cloning tools and speed breeding have significantly accelerated gene cloning in wheat over the past years. Here, we present an optimized high-throughput disease resistance gene cloning workflow that allows to identify causal genes in less than six months. As a proof-of-principle, we clone the stem rust resistance gene Sr6, which has been a historically relevant source of resistance to confine a major stem rust outbreak in North America in the mid-20^th century. Sr6 encodes a CC-BED-domain-containing nucleotide-binding and leucine-rich repeat (NLR) immune receptor. The workflow provides a basis to tackle the systematic cloning of all the genetically described disease resistance genes by the wheat community, which will facilitate knowledge-guided deployment of resistance genes in wheat breeding. © The Author(s) 2025.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Characterization of halogenated DBPs and identification of new DBPs trihalomethanols in chlorine dioxide treated drinking water with multiple extractions

引用

Journal of environmental sciences 2017年第8期58卷 83-92页

作者： Jiarui Han Xiangru Zhang Jiaqi Liu Xiaohu Zhu Tingting Gong Environmental Engineering Program Department of Civil and Environmental Engineering The Hong Kong University of Science and Technology School of the Environment Nanjing University

Chlorine dioxide(ClO2) is a widely used alternative disinfectant due to its high biocidal efficiency and low-level formation of trihalomethanes and haloacetic acids. A major portion of total organic halogen(TOX), a collective parameter for all halogenated DBPs, formed in ClO2-treated drinking water is still unknown. A commonly used pretreatment method for analyzing halogenated DBPs in drinking water is one-time liquid–liquid extraction(LLE), which may lead to a substantial loss of DBPs prior to analysis. In this study, characterization and identification of polar halogenated DBPs in a ClO2-treated drinking water sample were conducted by pretreating the sample with multiple extractions. Compared to one-time LLE, the combined four-time LLEs improved the recovery of TOX by 2.3 times. The developmental toxicity of the drinking water sample pretreated with the combined four-time LLEs was 1.67 times higher than that pretreated with one-time *** the aid of ultra-performance liquid chromatography/electrospray ionization-triple quadrupole mass spectrometry, a new group of polar halogenated DBPs, trihalomethanols,were detected in the drinking water sample pretreated with multiple extractions; two of them,trichloromethanol and bromodichloromethanol, were identified with synthesized standard compounds. Moreover, these trihalomethanols were found to be the transformation products of trihalomethanes formed during ClO2disinfection. The results indicate that multiple LLEs can significantly improve extraction efficiencies of polar halogenated DBPs and is a better pretreatment method for characterizing and identifying new polar halogenated DBPs in drinking water.

关键词： Disinfection byproducts DBPs Chlorine dioxide treatment Multiple extractions Toxicity

来源：评论

学校读者我要写书评

暂无评论

Biogas Production from Rice Husk Waste by using Solid State Anaerobic Digestion (SSAD) Method 2

Biogas Production from Rice Husk Waste by using Solid State ...

引用

2nd International Conference on Energy, environmental and Information System, ICENIS 2017

作者： Matin, Hashfi Hawali Abdul Hadiyanto Master Program of Environmental Science School of Post Graduate Studies Diponegoro University Indonesia Chemical Engineering Department Engineering Faculty Diponegoro University Indonesia

An effort to obtain alternative energy is still interesting subject to be studied, especially production of biogas from agriculture waste. This paper was an overview of the latest development of biogas researches from rice husk waste by Solid State Anaerobic Digestion (SSAD). The main obstacle of biogas production from rice husk waste was the lignin content which is very difficult degraded by microbes. Various pretreatments have been conducted, either physically, chemically as well as biologically. The SSAD method was an attractive option because of the low water content of rice husk waste. The biogas yield by SSAD method gave more attractive result compared to Liquid Anaerobic Digestion (LAD) method. Various studies were still conducted in batch mode laboratory scale and also has not found optimum operating conditions. Research on a larger scale such as bench and pilot scale with continuous systems will be an increase trend in the future research. © 2018 The Authors, published by EDP sciences.

关键词： Biogas

来源：评论

学校读者我要写书评

暂无评论

Correction to: Molybdenum oxide nanoporous asymmetric membranes for high‑capacity lithium ion battery anode

引用

Journal of Materials Research 2021年第13期37卷 2225-2225页

作者： Larson, Emilee Williams, Logan Jin, Congrui Chen, Xiaobo DiCesare, Jake Sheppard, Olivia Xu, Shaowen Wu, Ji Department of Chemistry and Biochemistry Georgia Southern University Statesboro USA Department of Civil and Environmental Engineering University of Nebraska-Lincoln Lincoln USA Materials Science and Engineering Program Binghamton University New York USA Department of Mechanical Engineering Georgia Southern University Statesboro USA

来源：评论

学校读者我要写书评

暂无评论

Accelerating the timeline for climate action in California

arXiv

引用

arXiv 2021年

作者： Kammen, Daniel M. Matlock, Teenie Pastor, Manuel Pellow, David Ramanathan, Veerabhadran Steyer, Tom Stokes, Leah Ventura, Feliz Energy and Resources Group Goldman School of Public Policy Department of Nuclear Engineering Renewable and Appropriate Energy Laboratory University of California Berkeley United States Vice Provost for Academic Personnel McClatchy Chair in Communications Department of Cognitive Science University of California Merced United States Department of Sociology University of Southern California United States Program in Environmental Studies University of California Santa Barbara United States Scripps Institution of Oceanography University of California San Diego United States TomKat Foundation United States Department of Political Science University of California Santa Barbara United States Hatch Urban Solutions

The climate emergency increasingly threatens our communities, ecosystems, food production, health, and economy. It disproportionately impacts lower income communities, communities of color, and the elderly. Assessments since the 2018 IPCC 1.5 Celsius report show that current national and sub-national commitments and actions are insufficient. Fortunately, a suite of solutions exists now to mitigate the climate crisis if we initiate and sustain actions today. California, which has a strong set of current targets in place and is home to clean energy and high technology innovation, has fallen behind in its climate ambition compared to a number of major governments. California, a catalyst for climate action globally, can and should ramp up its leadership by aligning its climate goals with the most recent science, coordinating actions to make 2030 a point of significant accomplishment. This entails dramatically accelerating its carbon neutrality and net-negative emissions goal from 2045 to 2030, including advancing clean energy and clean transportation standards, and accelerating nature-based solutions on natural and working lands. It also means changing its current greenhouse gas reduction goals both in the percentage and the timing: cutting emissions by 80 percent (instead of 40 percent) below 1990 levels much closer to 2030 than 2050. These actions will enable California to save lives, benefit underserved and frontline communities, and save trillions of dollars. This rededication takes heed of the latest science, accelerating equitable, job-creating climate policies. While there are significant challenges to achieving these goals, California can establish policy now that will unleash innovation and channel market forces, as has happened with solar, and catalyze positive upward-scaling tipping points for accelerated global climate action. © 2021, CC BY.

关键词： Greenhouse gases

来源：评论

学校读者我要写书评

暂无评论

Do greenness and landscape indices for greenspace correlate with suicide ratio?

引用

Landscape and Urban Planning 2024年 242卷

作者： Lee, Hsiao-Yun Chang, Hao-Ting Herianto, Samuel Wu, Chi-Shin Liu, Wan-Yu Yu, Chia-Pin Pan, Wen-Chi Wu, Chih-Da Department of Leisure Industry and Health Promotion National Taipei University of Nursing and Health Sciences Taipei 112 Taiwan Department of Geomatics College of Engineering National Cheng Kung University Tainan 70101 Taiwan Chemical Biology and Molecular Biophysics Program Taiwan International Graduate Program (TIGP) Academia Sinica Taipei 11529 Taiwan Institute of Chemistry Academia Sinica Taipei 11529 Taiwan Department of Chemistry (Chemical Biology Division) College of Science National Taiwan University Taipei 10617 Taiwan National Center for Geriatrics and Welfare Research National Health Research Institutes Zhunan 350 Taiwan Department of Forestry National Chung Hsing University Taichung 402 Taiwan Innovation and Development Center of Sustainable Agriculture National Chung Hsing University Taichung 402 Taiwan School of Forestry and Resource Conservation National Taiwan University Taipei 10617 Taiwan Institute of Environmentaland Occupational Health Sciences National Yang Ming Chiao Tung University Taipei 11221 Taiwan National Institute of Environmental Health Sciences National Health Research Institutes Miaoli 35053 Taiwan Innovation and Development Center of Sustainable Agriculture National Chung Hsing University Taichung City 402 Taiwan

Previous studies have demonstrated the preventive effects of greenness and greenspace using three classes of exposure metrics (greenspace coverage, greenness, and landscape indices for greenspace) on suicide. Nevertheless, most studies were individually employed for each metric using a single-phase method, representing the short-term exposure. We hierarchically investigated the association between three classes of exposure metrics and suicide using long-term data from 2000 to 2018 in Taiwan. Normalized difference vegetation index (NDVI) was used to represent the greenness exposure, while mean patch area (area and edge), area-weighted mean fractal dimension index (shape), and proximity index (proximity) were opted to represent landscape indices for greenspace. Using the generalized additive mixed model, we revealed that the relative risk (95% confidence interval) of greenspace coverage, NDVI, mean patch area, area-weighted mean fractal dimension index, and proximity index was 0.998 (0.997, 0.999), 0.860 (0.811, 0.912), 0.999 (0.999, 0.999), 1.485 (1.056, 2.088), and 0.999 (0.999, 0.999), respectively. This indicates that long-term exposure to both greenspace coverage and greenness is associated with a reduced suicide ratio. Similarly, long-term exposure to greenspace that is greater in size, simpler in shape, and closer in proximity is associated with a decreased suicide risk. For formulating future afforestation policies, the layout and connectivity of greenspaces should be considered besides increasing green areas. This study not only demonstrated the significance of long-term exposure to greenspace for reducing the suicide ratio, but also illustrated a hierarchical approach to examine the effects of greenspace. © 2023

关键词： Greenness Greenspace coverage Landscape indices for greenspace Longitudinal ecological study Suicide

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：