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production of polyacrylamide degradation and its implications in china

  • Polyacrylamide degradation and its implications in ...

    2018-9-7 · Polyacrylamide degradation and its implications in environmental systems ... Y. et al. Treatment of produced water from polymer flooding in oil production by …

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  • [PDF] Polyacrylamide degradation and its implications

    DOI: 10.1038/s41545-018-0016-8 Corpus ID: 135203788. Polyacrylamide degradation and its implications in environmental systems @article{Xiong2018PolyacrylamideDA, title={Polyacrylamide degradation and its implications in environmental systems}, author={Boya Xiong and R. D. Loss and D. Shields and Taylor Pawlik and Richard Hochreiter and A. Zydney and Manish Kumar}, journal={npj …

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  • Polyacrylamide degradation and its implications in ...

    High molecular weight (10 6 –3 × 10 7 Da) polyacrylamide (PAM) is commonly used as a flocculant in water and wastewater treatment, as a soil conditioner, and as a viscosity modifier and friction reducer in both enhanced oil recovery and high volume hydraulic fracturing. These applications of PAM can result in significant environmental challenges, both in water management and in ...

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  • Polyacrylamide degradation and its implications in ...

    High molecular weight (10 6 –3 × 10 7 Da) polyacrylamide (PAM) is commonly used as a flocculant in water and wastewater treatment, as a soil conditioner, and as a viscosity modifier and friction reducer in both enhanced oil recovery and high volume hydraulic fracturing. These applications of PAM can result in significant environmental challenges, both in water management and in ...

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  • polyacrylamide degradation and its implications |

    Polyacrylamide degradation and its implications in ... High molecular weight (106-3×107 Da) polyacrylamide (PAM) is commonly used as a flocculant in water and wastewater treatment, as a soil conditioner, and as a viscosity modifier and friction reducer in both enhanced oil recovery and high volume hydraulic fracturing.

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  • Degradation of Polyacrylamide (PAM) and methane

    2019-11-18 · Polyacrylamide degradation and its implications in environmental npj Clean Water ( IF 9.378) Pub Date : 2018-09-07, DOI: 10.1038/s41545-018-0016-8 Boya Xiong,Rebeca Dettam Loss,Derrick Shields,Taylor Pawlik,Richard Hochreiter,Andrew L Zydney,Manish Kumar

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  • the production and polymerization of polyacrylamide

    The method has simple production safety, process equipment and low cost of production, etc., is currently abroad method commonly used in the production of polyacrylamide. Using this method of production of polyacrylamide disc polymerization earliest use hand-workshop-style, then using a kneading machine. Developed in the late 1980s, the conical

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  • polyacrylamide degradation and its implications in

    Polyacrylamide degradation and its implications in environmental systems. npj Clean Water 2018 , 1 (1) DOI: 10.1038/s41545-018-0016-8. Pinki Pal, Sakshi Suman, Arpita Verma, Jay Prakash Pandey, Gautam Sen. Synthesis and optimization of hydrolyzed gum ghatti as …

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  • Microbial degradation of polyacrylamide and the ...

    2019-4-1 · Biodegradation of polyacrylamide begins with amidase catalysed deamination of polyacrylamide to ammonia and polyacrylate. The liberated ammonia is then used as a nitrogen source for growth by the microbes. The carbon backbone, polyacrylate, is more recalcitrant to biodegradation than the amide moieties.

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  • china high viscosity emulsion polyacrylamide for

    Polyacrylamide degradation and its implications in environmental systems . By Boya Xiong, Rebeca Dettam Loss, Derrick Shields, Taylor Pawlik, Richard Hochreiter, Andrew L Zydney and Manish Kumar. Cite . BibTex; Full citation Publisher: Springer Nature. Year: 2018. DOI ...

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  • Polyacrylamide degradation and its implications in ...

    Polyacrylamide degradation and its implications. Biodegradation of PAM occurs as microorganisms utilize the amide group of the polymer as a nitrogen source and/or the carbon backbone as a carbon source. 19,86 The amide group can be hydrolyzed by . Get Price

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  • biodegradation of hydrolyzed polyacrylamide by

    Although polyacrylamide (PAM) and its derivatives have many useful applications, their release in nature can have impacts on the environment and human health, thus bioremediation approaches for residual PAM are urgently needed. Biodegradation of PAM and its derivatives has been studied only in the last two decades, with most emphasis on acrylamide biodegradation.

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  • Biodegradation of Polyacrylamide and Its

    Polyacrylamide degradation and its implications. High molecular weight (10 6 鈥? 脳 10 7 Da) polyacrylamide (PAM) is commonly used as a flocculant in water and wastewater treatment, as a soil conditioner, and as a viscosity modifier and friction reducer in both enhanced oil recovery and high volume hydraulic fracturing.

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  • the plant supplies anionic polyacrylamide flocculant

    2021-5-30 · Polyacrylamide degradation and its implications in. polyacrylamide (HPAM), a co-polymer of acrylamide and acrylic acid, is the most widely used anionic PAM in oil and gas development as well as in soil conditioning. 1,91221 The most. Get Inquiry

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  • environmental hydrolyzed anionic polyacrylamide ...

    Water-soluble polyacrylamide is commercially available in different domains of industry, such as water purified, paper making, pharmacy, agriculture and oil exploitation. Especially polyacrylamide is used for polymer displacement, which can enhance oil recovery through increasing the sweeping efficiency. Good economic effects are achieved by the industrial application of polymer in various oil ...

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  • Degradation of Polyacrylamide: A Review |

    Polyacrylamide degradation and its implications. The hydrolyzed form of polyacrylamide (HPAM), a co-polymer of ... 110 was found to stabilize oil ... of acrylamide monomer from polyacrylamide-based flocculant use–sand and gravel quarry case ...

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  • polyacrylamide flocculant polymer precipitate solid

    2019-1-15 · Advanced treatment for actual hydrolyzed polyacrylamide. 2019-01-15· This study deeply investigated the overall performance, nitrogen transformation, membrane fouling and cleaning, extracelluar polymeric substances (EPS) and microbial function in a biofilm/activated sludge membrane bioreactor (BF-AS-MBR) for treating actual hydrolyzed polyacrylamide (HPAM)-containing oilfield …

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  • advanced treatment for actual hydrolyzed

    2019-5-15 · 1. Introduction. Biological wastewater treatment is widely applied worldwide owing to its effectiveness in nutrient removal, but huge amounts of waste activated sludge (WAS) are produced, which is a big problem faced by wastewater treatment plants (WWTPs) nowadays (Liu et al., 2017; Wang et al., 2018a, 2019).On one hand, WAS would readily cause secondary pollution if it is treated and …

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  • pam polyacrylamide and its application in water

    Polyacrylamide degradation and its implications in environmental systems | npj Clean Water. High molecular weight (106–3 × 107 Da) polyacrylamide (PAM) is commonly used as a flocculant in water and wastewater treatment, as a soil conditioner, and as a viscosity. Get Price

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  • Polyacrylamide degradation and its implications in ...

    High molecular weight (10 6 –3 × 10 7 Da) polyacrylamide (PAM) is commonly used as a flocculant in water and wastewater treatment, as a soil conditioner, and as a viscosity modifier and friction reducer in both enhanced oil recovery and high volume hydraulic fracturing. These applications of PAM can result in significant environmental challenges, both in water management and in ...

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  • Polyacrylamide degradation and its implications in ...

    Polyacrylamide degradation and its implications in environmental systems . High molecular weight (106–3 × 107 Da) polyacrylamide (PAM) is commonly used as a flocculant in water and wastewater treatment, as a soil conditioner, and as a viscosity modifier and friction reducer in both enhanced oil recovery and high volume hydraulic fracturing.

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  • Polyacrylamide degradation and its implications in ...

    Polyacrylamide degradation and its implications in environmental systems Boya Xiong , Rebeca Dettam Loss, Derrick Shields, Taylor Pawlik, Richard Hochreiter, Andrew L. Zydney, Manish Kumar Research output : Contribution to journal › Review article › peer-review

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  • polyacrylamide flocculant polymer precipitate solid

    Polyacrylamide degradation and its implications. The hydrolyzed form of polyacrylamide (HPAM), a co-polymer of ... 110 was found to stabilize oil ... of acrylamide monomer from polyacrylamide-based flocculant use–sand and gravel quarry case ...

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  • Degradation of Polyacrylamide: A Review | Scientific.Net

    Water-soluble polyacrylamide is commercially available in different domains of industry, such as water purified, paper making, pharmacy, agriculture and oil exploitation. Especially polyacrylamide is used for polymer displacement, which can enhance oil recovery through increasing the sweeping efficiency. Good economic effects are achieved by the industrial application of polymer in various oil ...

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  • Figure 1 from Biodegradation of Polyacrylamide and

    2019-4-23 · Degradation of polyacrylamide (PAM) and methane production by mesophilic and thermophilic anaerobic digestion: Effect of temperature and 1 . State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China

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  • Understanding the impact of cationic polyacrylamide

    Fig. 1 Proposed degradation pathways for PAM and HPAM depicting the enzymes involved and the possible intermediate compounds - 'Biodegradation of Polyacrylamide and Its Derivatives'

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  • degradation of polyacrylamide and its derivatives in

    2018-3-1 · Moreover, cPAM and its degradation metabolites such as polyacrylic acid, acrylic acid, and acrylamide would co-exist in the digestion system (Chang et al., 2001, Dai et al., 2015, Haveroen et al., 2005), thus the toxicity of cPAM and its degradation metabolites to the bio-conversion processes involved in anaerobic digestion is also needed to be ...

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  • Transfer and degradation of polyacrylamide based ...

    2021-7-13 · 1 Title: Transfer and degradation of polyacrylamide based flocculants in hydrosystems: a review 2 3 Authors: A. G. Guezennec1, C. Michel1, K.Bru1, S. Touze1, N. Desroche2, I. Mnif3, M. Motelica-Heino4 4 1 BRGM 5 2 Nexidia SAS, 15 Rue de Mayence 21000 DIJON France 36 Université de Nice 7 4 ISTO, UMR 7327 CNRS-Université d’Orléans, 1A rue de la Férollerie, 45071 Orléans cedex 2

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  • Unveiling the mechanisms of how cationic

    Cationic polyacrylamide, a flocculation powder widely used in wastewater pretreatment and sludge dewatering, was highly accumulated in waste activated sludge. However, its effect on short-chain fatty acids (SCFAs) accumulation from anaerobic fermentation of waste activated sludge has not been invest …

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  • CSIRO PUBLISHING | The Rangeland Journal

    2015-1-27 · Grassland degradation on the Qinghai-Tibetan Plateau has become one of the most important issues for ecological science and policy-making in China. Even though researchers have explained the process of grassland degradation in some sub-regions, they have failed to reach any consensus on the primary causes and underlying mechanisms, and strategies for restoration. In this …

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  • Water pollution from agriculture: a global review ...

    2021-2-9 · fisheries. Water-quality degradation may also have severe direct impacts on productive The livestock sector is growing and intensifying faster than crop production in almost all countries. The associated waste, including manure, has serious Neil Palmer (IWMI) implications for water quality

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  • Cause of Land Degradation and Its Impacts on

    2021-6-4 · degradation (Baylis et al., 2012; UNCCD, 2013). Land degradation has negative consequences on agriculture. (Olsson et al.2005). This study therefore seeks to identify the main impact of land degradation on livelihoods of the study area in direct and indirect ways and off-farm activities in addition to farming lands

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  • Curbing Desertification in China - World Bank

    2019-7-4 · Ningxia Hui Autonomous Region in northwestern China is surrounded by three major deserts. It has been fighting desertification for over six decades. As of 2010, 57% of its territory, or 2.97 million hectares, had been affected by desertification. The encroaching deserts threaten to destroy farmland and bury villages, forcing people to abandon ...

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  • Analysis on the Causes of Deforestation and Forest ...

    2017-8-17 · Keywords: Deforestation and forest degradation (D&FD), population growth, shifting cultivation, unsustainable logging, and DPSIR framework. Introduction Deforestation and forest degradation (D&FD) are amongst the major global environmental problems the world is trying to solve as vast areas of forest cover are being lost on a daily basis.

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  • The problem of land degradation

    2021-2-9 · The cost of land degradation. The most authoritative estimates of the extent of land degradation are contained in a report on South Asia prepared by UNDP, UNEP and FAO (Land Degradation in South Asia: its severity, causes and effects upon the people, Rome, FAO, 1994).Water erosion is the most common form of degradation in the area, affecting 25 percent of agricultural land.

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  • Of Maize and Markets: China’s New Corn Policy |

    While China’s corn production is mainly used for domestic consumption, policy changes in China’s corn markets have trade implications for the global corn, beef, and pork sectors. For example, last month, the United States filed a complaint with the World Trade Organization over China’s excessive subsidies to corn, rice, and wheat farmers ...

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  • A comprehensive investigation of starch

    2017-5-13 · Introduction. Starch is the major storage carbohydrate in higher plants and is made up of glucose polymers, amylose and amylopectin, forming complex semi-crystalline structures and starch granules in plastids (Hostettler et al., 2011; Monroe and Preiss, 1990).Starch degradation has been mainly investigated in Arabidopsis leaves where starch accumulates in chloroplasts during the day …

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  • POLYACRYLAMIDE IN AGRICULTURE AND

    2010-11-20 · POLYACRYLAMIDE IN AGRICULTURE AND ENVIRONMENTAL LAND MANAGEMENT R. E. Sojka,1 D. L. Bjorneberg,1 J. A. Entry,1 R. D. Lentzl and W. J. Orts2 1 Northwest Irrigation and Soils Research Laboratory, USDA Agricultural Research Service, 3793N-3600E Kimberly, Idaho 83341

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  • CSIRO PUBLISHING | The Rangeland Journal

    2015-1-27 · Grassland degradation on the Qinghai-Tibetan Plateau has become one of the most important issues for ecological science and policy-making in China. Even though researchers have explained the process of grassland degradation in some sub-regions, they have failed to reach any consensus on the primary causes and underlying mechanisms, and strategies for restoration. In this …

    Get Price
  • Analysis on the Causes of Deforestation and Forest ...

    2017-8-17 · Keywords: Deforestation and forest degradation (D&FD), population growth, shifting cultivation, unsustainable logging, and DPSIR framework. Introduction Deforestation and forest degradation (D&FD) are amongst the major global environmental problems the world is trying to solve as vast areas of forest cover are being lost on a daily basis.

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  • Curbing Desertification in China - World Bank

    2019-7-4 · Ningxia Hui Autonomous Region, in northwestern China, has been in a battle against the desert since the 1950s. A World Bank-supported project has been helping to control desertification, revegetation, and introduce other ecological protection measures.

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  • Characteristics and viral propagation properties of a new ...

    2017-11-30 · dard for the Pharmacopoeia of the People’s Republic of China (2010), Volume III, the use of the HDCSs is limited to genera-tions within 2-thirds of the primary cell lifespan for the manu-facture of vaccines. Due to the scarce HDCSs resources, the research and production of viral HDCVs in China are substan-tially restricted.

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  • Water pollution from agriculture: a global review ...

    2021-2-9 · fisheries. Water-quality degradation may also have severe direct impacts on productive The livestock sector is growing and intensifying faster than crop production in almost all countries. The associated waste, including manure, has serious Neil Palmer (IWMI) implications for water quality

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  • Impact of Population Growth on Environmental

    2011-11-4 · world and China will be second in 2050. India having 18% of the world's population on 2.4% of world's total area has greatly increased the pressure on its natural resources. Water shortages, soil exhaustion and erosion, deforestation, air and water pollution afflicts many areas. If …

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  • Of Maize and Markets: China’s New Corn Policy |

    While China’s corn production is mainly used for domestic consumption, policy changes in China’s corn markets have trade implications for the global corn, beef, and pork sectors. For example, last month, the United States filed a complaint with the World Trade Organization over China’s excessive subsidies to corn, rice, and wheat farmers ...

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  • A comprehensive investigation of starch degradation ...

    2017-5-13 · Introduction. Starch is the major storage carbohydrate in higher plants and is made up of glucose polymers, amylose and amylopectin, forming complex semi-crystalline structures and starch granules in plastids (Hostettler et al., 2011; Monroe and Preiss, 1990).Starch degradation has been mainly investigated in Arabidopsis leaves where starch accumulates in chloroplasts during the day …

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  • China can lead global green trade drive -

    2020-1-16 · China has a pivotal role to play in all three. As the world's second-largest economy, China's evolving trade relations, especially with the United States, have huge global economic implications ...

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  • Cationic polyacrylamide copolymers (PAMs):

    2018-5-18 · Cationic polyacrylamide copolymers (PAMs) are used for sludge dewatering in municipal waste water treatment and might enter the environment by spreading of the sludge on agricultural land. Concern has been expressed since little is known about the degradation of PAMs in soils. To obtain detailed information on the polymer’s fate in the soil compartment, the degradation of 14C …

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  • Literature on Polyacrylamide Gels | Linda Chalker

    Model and field studies of the degradation of cross-linked polyacrylamide gels used during the revegetation of slate waste. Science of the Total Environment 336(1/3): 13-24. Lu, J., X.F. Huang, Z.J. Tang and W.H. Zhan. 2004. Economic feasibility of PAM application in rain-fed agriculture in the loess regions of Northwest China.

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  • Climate change: Land degradation and desertification

    2020-10-26 · Land degradation has accelerated during the 20 th and 21 st centuries due to increasing and combined pressures of agricultural and livestock production (over-cultivation, overgrazing, forest conversion), urbanization, deforestation and extreme weather events such as droughts and coastal surges, which salinate land.

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  • MIGRATION AND LAND DEGRADATION - UNCCD

    2018-6-5 · 4.6 Land degradation and migration in China 17 4.7 Dams, mega-disasters, and displacement 18 4.8 Indirect impacts of land degradation on urban ecological decline and migration 19 4.9 Drought, land degradation, migration, and violent conflict 19 4.10 Out-migration as a cause of land degradation …

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  • Characteristics and viral propagation properties of a new ...

    2017-11-30 · dard for the Pharmacopoeia of the People’s Republic of China (2010), Volume III, the use of the HDCSs is limited to genera-tions within 2-thirds of the primary cell lifespan for the manu-facture of vaccines. Due to the scarce HDCSs resources, the research and production of viral HDCVs in China are substan-tially restricted.

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  • Thompson, Anita – Biological Systems Engineering –

    2018-7-8 · Tip of the Iceberg: Implications of Illegal CFC Production and Use is an update on China’s illegal CFC-11 emissions crisis and includes independent laboratory tests of polyurethane (PU) foam samples – provided by Chinese enterprises previously investigated by EIA – that confirm the presence of CFC-11 as a blowing agent.

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  • Blowing It: Illegal Production and Use of Banned CFC

    2020-7-23 · Immunoglobulins (Igs), as one of the hallmarks of adaptive immunity, first arose approximately 500 million years ago with the emergence of jawed vertebrates. Two events stand out in the evolutionary history of Igs from cartilaginous fish to mammals: (a) the diversification of Ig heavy chain (IgH) genes, resulting in Ig isotypes or subclasses associated with novel functions, and (b) the ...

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  • The impact of the Green Revolution on indigenous

    2014-5-15 · Agriculture is a vital industry in China, employing over 300 million farmers. Through intensification, the agricultural revolution in China has influenced the usage and accumulation of nutrients, but at the same time increased the risk of water pollution [].Crop production has greatly increased from the 1980s, due to improved crop varieties in combination with increasing use of fertilizers ...

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  • Literature on Polyacrylamide Gels | Linda Chalker

    Model and field studies of the degradation of cross-linked polyacrylamide gels used during the revegetation of slate waste. Science of the Total Environment 336(1/3): 13-24. Lu, J., X.F. Huang, Z.J. Tang and W.H. Zhan. 2004. Economic feasibility of PAM application in rain-fed agriculture in the loess regions of Northwest China.

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  • Energy and Economic Implications of Solar Photovoltaic ...

    2016-2-5 · Assuming linear cumulative degradation and an annual average degradation rate of 0.5 %, a 6.5 % total production loss is realized over a 25 year study period, and leads to an additional 1484 in life-cycle costs from purchasing the 10.2 kW system installed on the NZERTF

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  • Ruminococcus albus 8 Mutants Defective in Cellulose ...

    The cellulolytic bacterium Ruminococcus albus 8 adheres tightly to cellulose, but the molecular biology underpinning this process is not well characterized. Subtractive enrichment procedures were used to isolate mutants of R. albus 8 that are defective in adhesion to cellulose. Adhesion of the mutant strains was reduced 50% compared to that observed with the wild-type strain, and cellulose ...

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  • The E3 ubiquitin ligase RNF182 inhibits TLR‐triggered ...

    2020-5-26 · Abstract. Extracellular lysophosphatidate (LPA) signalling is regulated by the balance of LPA formation by autotaxin (ATX) versus LPA degradation by lipid phosphate phosphatases (LPP) and by the relative expressions of six G-protein-coupled LPA receptors. These receptors increase cell proliferation, migration, survival and angiogenesis. Acute inflammation produced by tissue damage stimulates...

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  • Signalling by lysophosphatidate and its health

    China’s current Air Quality Index (AQI) system only considers one air pollutant which has the highest concentration value. In order to comprehensively evaluate the urban air quality of Jiangsu Province, this paper has studied the air quality of 13 cities in that province from April 2015 to March 2018 based on an expanded AQI system that includes six major air pollutants.

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  • Articles de revues : « Urbanisation Urbanisme Suzhou ...

    2018-9-1 · Biorefinery of microalgae - opportunities and constraints for different production scenarios.. PubMed. Hariskos, Ioanna; Posten, Clemens. 2014-06-01. In order to design economically feasible production processes it is necessary, as part of the biorefinery concept, to valorize all constituents of the microalgal biomass. Such an approach requires appropriate biorefinery side-process strategies ...

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  • combining biorefinery principles: Topics by Science.gov

    Résumé : During conventional finishing textile processes it is necessary a big consumption both of water and energy. This aspectsare is imposed by the development process of thermo and mass transfer of finishing agents into the textile structure materials applied in dentistry (fibers, yarns, fabric, nonwovens).

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  • Chapitres de livres : « Textile finishing – South Africa ...

    Liste de chapitres de livres sur le sujet « De claration d'une partie de l'Assemble e sur le de cret rendu le 13 avril 1790 concernant la religion ». Publications scientifiques : télécharger le …

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