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A review of traditional and novel detection techniques for melamine and its analogues in foods and animal feed

Mengshi LIN,

《化学科学与工程前沿(英文)》 2009年 第3卷 第4期   页码 427-435 doi: 10.1007/s11705-009-0244-z

摘要: Melamine, a nitrogen-rich chemical, has received much attention in recent years due to a series of highly publicized food safety incidents, including 2007 pet food recalls in North America and 2008 melamine contamination in milk, infant formula, and other milk-derived products in China. Current analytical methods for testing melamine are time-consuming, expensive, and labor-intensive. Therefore, there is an increasing interest in the food science and analytical chemistry field to develop simple, quick, sensitive, and cost-effective methods for detection of melamine and its analogues (e.g., cyanuric acid, melamine cyanurate, ammelide, and ammeline) in food ingredients, processed food, and animal feed. This review aims to summarize traditional and novel analytical techniques that have been used or show great potential to detect, characterize, and quantify melamine and its analogues in foods and animal feed.

关键词: milk-derived     Melamine     labor-intensive     cyanurate     time-consuming    

Characterising populations living close to intensive farming and composting facilities in England

《环境科学与工程前沿(英文)》 2021年 第15卷 第3期 doi: 10.1007/s11783-020-1332-z

摘要:

• Bioaerosol emitted from farming and composting facilities may pose health risks.

关键词: Composting     Intensive farming     Bioaerosol     Population characteristics     Public health    

Model for the Coordinated Development of a Circular Economy in China and Its Application to Energy-intensive

Ji-liang Zheng,Chen Zheng,Pan Chen,Ching Yuan Luk

《工程管理前沿(英文)》 2014年 第1卷 第4期   页码 364-371 doi: 10.15302/J-FEM-2014053

摘要: Energy-intensive industries (EIIs) are fundamental to the industrial development of China and are also the key industries of a circular economic infrastructure. It is worth paying attention to the coordinated development of a circular economy using EIIs due to the present interrelationship among EIIs. It is related to the optimization and comprehensive performance improvement of a circular economy. Based on the perspective of order parameter, this study uses economic and environmental subsystems to establish an evaluation model that examines the coordinated development of a circular economy within six main EIIs and an EII cluster from 2006 to 2011 in China. The result shows that the level of coordinated development in a circular economy among six EIIs differs and the level of coordinated development of circular economy among the EII cluster lags behind that of each EII examined. It also shows that the outside coordinated degree of EIIs is lower than the inside coordinated degree of each EII.

关键词: order parameter     coordinated degree evaluation     energy-intensive industry     circular economy    

REGIONAL ASSESSMENT OF SOIL NITROGEN MINERALIZATION IN DIVERSE CROPLAND OF A REPRESENTATIVE INTENSIVE

《农业科学与工程前沿(英文)》 2023年 第10卷 第4期   页码 530-540 doi: 10.15302/J-FASE-2023515

摘要:

Soil nitrogen mineralization (Nmin) is a key process that converts organic N into mineral N that controls soil N availability to plants. However, regional assessments of soil Nmin in cropland and its affecting factors are lacking, especially in relation to variation in elevation. In this study, a 4-week incubation experiment was implemented to measure net soil Nmin rate, gross nitrification (Nit) rate and corresponding soil abiotic properties in five field soils (A–C, maize; D, flue-cured tobacco; and E, vegetables; with elevation decreasing from A to E) from different altitudes in a typical intensive agricultural area in Dali City, Yunnan Province, China. The results showed that soil Nmin rate ranged from 0.10 to 0.17 mg·kg−1·d−1 N, with the highest value observed in field E, followed by fields D, C, B, and A, which indicated that soil Nmin and Nit rates varied between fields, decreasing with elevation. The soil Nit rate ranged from 434.2 to 827.1 µg·kg−1·h−1 N, with the highest value determined in field D, followed by those in fields E, C, B, and A. The rates of soil Nmin and Nit were positively correlated with several key soil parameters, including total soil N, dissolved organic carbon and dissolved inorganic N across all fields, which indicated that soil variables regulated soil Nmin and Nit in cropland fields. In addition, a strong positive relationship was observed between soil Nmin and Nit. These findings provide a greater understanding of the response of soil Nmin among cropland fields related to spatial variation. It is suggested that the soil Nmin from cropland should be considered in the evaluation of the N transformations at the regional scale.

关键词: cropland     gross nitrification rate     regulatory factors     soil nitrogen mineralization     spatial variation    

CLIMATE-CHANGE-INDUCED TEMPORAL VARIATION IN PRECIPITATION INCREASES NITROGEN LOSSES FROM INTENSIVE CROPPING

《农业科学与工程前沿(英文)》 2022年 第9卷 第3期   页码 457-464 doi: 10.15302/J-FASE-2022452

摘要:

● A simple model was used to evaluate how increasing temporal variability in precipitation influences crop yields and nitrogen losses.

关键词: crop yield     fertilizer timing     nitrogen loss     precipitation variability     toy model    

太湖流域农业经营集约化管理研究

史健鹏,金苗,任泽,黄贤忠,李旭祥

《中国工程科学》 2010年 第12卷 第6期   页码 104-107

摘要:

就解决太湖水体富营养化最主要的污染源——农业面污染源,根据微观经济学原理建立了农业集约化管理模型。以GIS为平台估算其耕地面积和化肥的科学施用量,用SPSS相关性分析当地居民的问卷调查,对集约化管理产生的经济效益和环境效益进行详细分析,得出农业面源污染物总氮、总磷排放比2005年各下降21 %和16 %。结论显示在太湖流域套用集约化管理能够很好地控制农业面污染源,将农业面污染源的问题与实际社会成本、农业体制改革结合,从根本上解决农业面污染源。

关键词: 太湖     农业面源污染     集约化管理     GIS     SPSS    

Greenhouse gas emissions mitigation and economic viability of sugar crops in China

《农业科学与工程前沿(英文)》 doi: 10.15302/J-FASE-2023529

摘要:

● Sugarcane and sugar beet yield and carbon footprint rose with time but profit declined

关键词: Economic profits     GHG emissions     labor input     nitrogen input     sugar    

High risk factors for pulmonary fungous infection in intensive care units of neurosurgery

ZHU Wenyu, TAN Liping, CHEN Xiangfeng, HUANG Qiang, LAN Qing

《医学前沿(英文)》 2007年 第1卷 第3期   页码 299-303 doi: 10.1007/s11684-007-0057-8

摘要: By analyzing the high risk factors for pulmonary fungous infection in intensive care units of neurosurgery, the strategy of early diagnosis and treatment was explored. According to the domestic diagnostic standard on pulmonary fungous infection, clinical data on 58 patients with the infection in our department were analyzed. One hundred and seventeen strains of fungi were separated from the 58 cases. Candidiasis was the most frequent type, accounting for 92.3% of the cases. Conditions such as the severity of primary diseases, long-time coma, long-term use of broad-spectrum antibiotic, abuse of glucocorticoid, the open airway, and some invasive intubations, may be regarded as high risk factors for pulmonary fungous infection. Fluconazole showed good clinical effects on the treatment of fungous infection. To eliminate these high risk factors, early diagnosis and the use of prophylactic antifungal agents can help reduce the incidence of pulmonary fungous infection.

关键词: seventeen     incidence     glucocorticoid     broad-spectrum antibiotic     Candidiasis    

Carbon capture for decarbonisation of energy-intensive industries: a comparative review of techno-economic

《化学科学与工程前沿(英文)》 2022年 第16卷 第9期   页码 1291-1317 doi: 10.1007/s11705-022-2151-5

摘要: Carbon capture and storage will play a crucial role in industrial decarbonisation. However, the current literature presents a large variability in the techno-economic feasibility of CO2 capture technologies. Consequently, reliable pathways for carbon capture deployment in energy-intensive industries are still missing. This work provides a comprehensive review of the state-of-the-art CO2 capture technologies for decarbonisation of the iron and steel, cement, petroleum refining, and pulp and paper industries. Amine scrubbing was shown to be the least feasible option, resulting in the average avoided CO2 cost of between 62.7 €·tCO21 for the pulp and paper and 104.6 €·tCO21 for the iron and steel industry. Its average equivalent energy requirement varied between 2.7 (iron and steel) and 5.1 MJthkgCO21 (cement). Retrofits of emerging calcium looping were shown to improve the overall viability of CO2 capture for industrial decarbonisation. Calcium looping was shown to result in the average avoided CO2 cost of between 32.7 (iron and steel) and 42.9 €·tCO21 (cement). Its average equivalent energy requirement varied between 2.0 (iron and steel) and 3.7 MJthkgCO21 (pulp and paper). Such performance demonstrated the superiority of calcium looping for industrial decarbonisation. Further work should focus on standardising the techno-economic assessment of technologies for industrial decarbonisation.

关键词: industrial CO2 emissions     CCS deployment     carbonate looping     net-zero industry     carbon capture benchmarks    

Soil-water interaction in unsaturated expansive soil slopes

ZHAN Liangtong

《结构与土木工程前沿(英文)》 2007年 第1卷 第2期   页码 198-204 doi: 10.1007/s11709-007-0023-1

摘要: The intensive soil-water interaction in unsaturated expansive soil is one of the major reasons for slope failures. In this paper, the soil-water interaction is investigated with the full-scale field inspection of rainwater infiltration and comprehensive experiments, including wetting-induced softening tests, swelling, and shrinkage tests. It is demonstrated that the soil-water interaction induced by seasonal wetting-drying cycles is very complex, and it involves coupled effects among the changes in water content, suction, stress, deformation and shear strength. In addition, the abundant cracks in the expansive soil play an important role in the soil-water interaction. The cracks disintegrate the soil mass, and more importantly, provide easy pathways for rainfall infiltration. Infiltration of rainwater not only results in wetting-induced softening of the shallow unsaturated soil layers, but also leads to the increase of horizontal stress. The increase of horizontal stress may lead to a local passive failure. The seasonal wetting-drying cycles tend to result in a down-slope creeping of the shallow soil layer, which leads to progressive slope failure.

关键词: strength     intensive soil-water     comprehensive     Infiltration     wetting-induced softening    

Electricity demand, GDP and employment: evidence from Italy

Cosimo MAGAZZINO

《能源前沿(英文)》 2014年 第8卷 第1期   页码 31-40 doi: 10.1007/s11708-014-0296-8

摘要: This paper applies time series methodologies to examine the causal relationship among electricity demand, real per capita GDP and total labor force for Italy from 1970 to 2009. After a brief introduction, a survey of the economic literature on this issue is reported, before discussing the data and introducing the econometric techniques used. The results of estimation indicate that one cointegrating relationship exists among these variables. This equilibrium relation implies that, in the long-run, GDP and labor force are correlated negatively, as well as GDP and electricity. Moreover, there is a bi-directional Granger causality flow between real per capita GDP and electricity demand; while labor force does not Granger-cause neither real per capita GDP nor electricity demand. This implies that electricity demand and economic growth are jointly determined at the same time for the Italian case. The forecast error variance decomposition shows that forecast errors in real per capita GDP are mainly caused by the uncertainty in GDP itself, while forecast errors in labor force are mainly resulted from the labor force itself, although aggregate income and electricity are important, too.

关键词: energy policies     electricity demand     GDP     labor force     stationarity     structural breaks     cointegration     causality     Italy    

钱学森创立知识密集型草产业的划时代贡献

李毓堂

《中国工程科学》 2002年 第4卷 第1期   页码 15-22

摘要:

文章论述了钱学森提出创建知识密集型草产业的历史背景、科学内涵、理论意义、应用成果和在21世纪中国可持续发展战略中的重要作用,并根据钱老的主张,提出当前启动全国大规模草产业工程必须创新管理机制。

关键词: 钱学森     知识密集型草产业     草业系统工程     可持续发展战略    

models to estimate hydrology and diffuse water pollution in North-eastern German lowland catchments with intensive

Muhammad WASEEM, Frauke KACHHOLZ, Jens TRÄNCKNER

《农业科学与工程前沿(英文)》 2018年 第5卷 第4期   页码 420-431 doi: 10.15302/J-FASE-2018243

摘要:

Various process-based models are extensively being used to analyze and forecast catchment hydrology and water quality. However, it is always important to select the appropriate hydrological and water quality modeling tools to predict and analyze the watershed and also consider their strengths and weaknesses. Different factors such as data availability, hydrological, hydraulic, and water quality processes and their desired level of complexity are crucial for selecting a plausible modeling tool. This review is focused on suitable model selection with a focus on desired hydrological, hydraulic and water quality processes (nitrogen fate and transport in surface, subsurface and groundwater bodies) by keeping in view the typical lowland catchments with intensive agricultural land use, higher groundwater tables, and decreased retention times due to the provision of artificial drainage. In this study, four different physically based, partially and fully distributed integrated water modeling tools, SWAT (soil and water assessment tool), SWIM (soil and water integrated model), HSPF (hydrological simulation program– FORTRAN) and a combination of tools from DHI (MIKE SHE coupled with MIKE 11 and ECO Lab), have been reviewed particularly for the Tollense River catchment located in North-eastern Germany. DHI combined tools and SWAT were more suitable for simulating the desired hydrological processes, but in the case of river hydraulics and water quality, the DHI family of tools has an edge due to their integrated coupling between MIKE SHE, MIKE 11 and ECO Lab. In case of SWAT, it needs to be coupled with another tool to model the hydraulics in the Tollense River as SWAT does not include backwater effects and provision of control structures. However, both SWAT and DHI tools are more data demanding in comparison to SWIM and HSPF. For studying nitrogen fate and transport in unsaturated, saturated, and river zone, HSPF was a better model to simulate the desired nitrogen transformation and transport processes. However, for nitrogen dynamics and transformations in shallow streams, ECO Lab had an edge due its flexibility for inclusion of user-desired water quality parameters and processes. In the case of SWIM, most of the input data and governing equations are similar to SWAT but it does not include water bodies (ponds and lakes), wetlands and drainage systems. In this review, only the processes that were needed to simulate the Tollense River catchment were considered, however the resulted model selection criteria can be generalized to other lowland catchments in Australia, North-western Europe and North America with similar complexity.

关键词: diffuse pollution     ECO Lab     HSPF     lowland catchment     MIKE 11     MIKE SHE     modeling tools     SWAT     SWIM     Tollense River     water quality    

重大耗能设备低碳运行智能控制方法 Article

柴天佑, 李明宇, 周正, 程思宇, 贾瑶, 吴志伟

《工程(英文)》 2023年 第27卷 第8期   页码 84-95 doi: 10.1016/j.eng.2023.05.018

摘要:

本文在分析重大耗能设备运行专家的运行控制行为的基础上,将机理分析与深度学习,控制与优化和预测相结合,决策与控制相集成,提出了使单吨能耗在目标范围内尽可能小的低碳运行智能控制方法。该方法由设定值控制、自优化校正、跟踪控制组成。采用工业互联网端边云协同技术,研制了低碳运行的智能控制系统,成功应用于电熔镁炉,取得减少碳排放的显著效果。

关键词: 重大耗能设备     低碳运行     智能控制     端边云协同技术    

Phosphorus status, use and recycling in a Chinese peri-urban region with intensive animal husbandry and

Marco ROELCKE, Lisa HEIMANN, Yong HOU, Jianbin GUO, Qiaoyun XUE, Wei JIA, Anne OSTERMANN, Roxana Mendoza HUAITALLA, Moritz ENGBERS, Clemens OLBRICH, Roland W. SCHOLZ, Joachim CLEMENS, Frank SCHUCHARDT, Rolf NIEDER, Xuejun LIU, Fusuo ZHANG

《农业科学与工程前沿(英文)》 2019年 第6卷 第4期   页码 388-402 doi: 10.15302/J-FASE-2019286

摘要:

The Sino-German research collaboration project, “Recycling of organic residues from agricultural and municipal origin in China” (2008–2012), comprising different interdisciplinary research groups, and also German small and medium-sized enterprises, aimed at developing integrated strategies and solutions for the recycling of organic residues in China. In an intensive crop-livestock agricultural region in the Shunyi District of Beijing, five typical cropping systems were investigated. The research was conducted in the form of analyses of phosphorus (P) in soil, plants, animal feed, animal products, manures, mineral and organic fertilizers and the derivation of the corresponding nutrient balances and P flows. The mean annual P balance surplus was 492 kg·ha ·yr P for the vegetable production system, significantly higher ( <0.05) than that for orchards (130 kg·ha ·yr P) and cereal crops (83 kg·ha ·yr P). Plant-available P (Olsen-P) concentrations of topsoils (0–20 cm) had good correlations with the amounts of P applied (from mineral and organic sources). Compared to results from the Second Chinese National Soil Survey of 1981, mean concentrations of available P in soils of 19 plots investigated in Shunyi District increased 10-fold (from 7.3 to 60 mg·kg ) from 1981 to 2009. On average, the critical limit for Olsen-P concentrations (>30 mg·kg ) that can lead to increased risk of P loss was exceeded in all five cropping systems. With feed additives, the “natural background value” (Chinese Environmental Quality Standard for Soils) of copper and zinc in topsoils was exceeded at several sites. Screening for several substances in the veterinary antibiotic classes of sulfonamides, tetracyclines, and fluoroquinolones revealed widespread topsoil contamination. Calculated livestock densities were 10.6 livestock units per ha arable land in 2007. Animal husbandry is increasingly conducted in large operations, making traditional ways of reuse difficult to apply. Comparing three management systems for treatment of organic residues from a pig farm via aerobic (composting) or anaerobic (biogas) treatment in a life cycle assessment, the resulting cropland demand for a sustainable land application of biogas effluent varied between 139 and 288 ha·yr , well above the cropland area owned by the farm (10 ha). The mismatch problems in the above context between business-as-usual and improving performance are framed and discussed as (1) the mismatch between centralized animal husbandry and smallholder farming, (2) the mismatch between livestock density and cropland, (3) nutrient (including P) recycling and increasing organic matter content versus energy production, (4) subsidies for compost production and biogas, as well as (5) advances in the regulatory framework in China.

关键词: cropping systems     life cycle assessment     North China Plain     balances and nutrient flows     transdisciplinary approach    

标题 作者 时间 类型 操作

A review of traditional and novel detection techniques for melamine and its analogues in foods and animal feed

Mengshi LIN,

期刊论文

Characterising populations living close to intensive farming and composting facilities in England

期刊论文

Model for the Coordinated Development of a Circular Economy in China and Its Application to Energy-intensive

Ji-liang Zheng,Chen Zheng,Pan Chen,Ching Yuan Luk

期刊论文

REGIONAL ASSESSMENT OF SOIL NITROGEN MINERALIZATION IN DIVERSE CROPLAND OF A REPRESENTATIVE INTENSIVE

期刊论文

CLIMATE-CHANGE-INDUCED TEMPORAL VARIATION IN PRECIPITATION INCREASES NITROGEN LOSSES FROM INTENSIVE CROPPING

期刊论文

太湖流域农业经营集约化管理研究

史健鹏,金苗,任泽,黄贤忠,李旭祥

期刊论文

Greenhouse gas emissions mitigation and economic viability of sugar crops in China

期刊论文

High risk factors for pulmonary fungous infection in intensive care units of neurosurgery

ZHU Wenyu, TAN Liping, CHEN Xiangfeng, HUANG Qiang, LAN Qing

期刊论文

Carbon capture for decarbonisation of energy-intensive industries: a comparative review of techno-economic

期刊论文

Soil-water interaction in unsaturated expansive soil slopes

ZHAN Liangtong

期刊论文

Electricity demand, GDP and employment: evidence from Italy

Cosimo MAGAZZINO

期刊论文

钱学森创立知识密集型草产业的划时代贡献

李毓堂

期刊论文

models to estimate hydrology and diffuse water pollution in North-eastern German lowland catchments with intensive

Muhammad WASEEM, Frauke KACHHOLZ, Jens TRÄNCKNER

期刊论文

重大耗能设备低碳运行智能控制方法

柴天佑, 李明宇, 周正, 程思宇, 贾瑶, 吴志伟

期刊论文

Phosphorus status, use and recycling in a Chinese peri-urban region with intensive animal husbandry and

Marco ROELCKE, Lisa HEIMANN, Yong HOU, Jianbin GUO, Qiaoyun XUE, Wei JIA, Anne OSTERMANN, Roxana Mendoza HUAITALLA, Moritz ENGBERS, Clemens OLBRICH, Roland W. SCHOLZ, Joachim CLEMENS, Frank SCHUCHARDT, Rolf NIEDER, Xuejun LIU, Fusuo ZHANG

期刊论文