28,523 results match your criteria emission factors


A novel approach to estimate the abatement of ammonia emissions from mitigation techniques at farm-scale slurry stores exemplified by a semi-floating cover.

J Environ Qual 2021 Jul 28. Epub 2021 Jul 28.

Forest and Food Sciences, Bern University of Applied Sciences School of Agricultural, Zollikofen, Switzerland.

Ammonia (NH ) losses from livestock slurry stores substantially contribute to agricultural emissions to the atmosphere. Gas release from slurry storage facilities is driven by interactions between store operations and meteorological conditions. This study quantifies the abating effect of an impermeable semi-floating cover as an emission mitigation technique at a farm-scale slurry storage tank. Read More

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Determining the geographical model and environmental resilience patterns in Iranian provinces.

Environ Monit Assess 2021 Jul 27;193(8):524. Epub 2021 Jul 27.

Department of Natural Resources and Environmental Engineering, College of Agriculture, Shiraz University, Shiraz, Iran.

Considering environmental resources as a context for sustainable development is of paramount importance. Iran has faced a variety of environmental problems over the past few decades due to population development, changing patterns of residence, and urban development. Resilience measures the adaptation to changes occurring after unwanted events. Read More

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Imaging reveals importance of shape and flexibility for glomerular filtration of biologics.

Mol Cancer Ther 2021 Jul 26. Epub 2021 Jul 26.

Preclinical and Translational Pharmacokinetics, Genentech, Inc

Advances in antibody engineering have enabled the construction of novel molecular formats in diverse shapes and sizes, providing new opportunities for cancer immunotherapeutic drug discovery while also revealing limitations in knowledge of structure-activity relationships. The current understanding of renal filtration originates largely from data reported for dextrans, IgG, albumin, and selected globular proteins. For a one-armed IgG-based T-cell imaging agent, we observed higher renal signal than typically observed for bivalent IgGs, prompting us to explore the factors governing renal filtration of biologics. Read More

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Elevated plasma succinate levels are linked to higher cardiovascular disease risk factors in young adults.

Cardiovasc Diabetol 2021 Jul 27;20(1):151. Epub 2021 Jul 27.

Department of Endocrinology and Nutrition and Research Unit, University Hospital of Tarragona Joan XXIII-Institut d ́Investigació Sanitària Pere Virgili (IISPV), Tarragona, Spain.

Background: Succinate is produced by both host and microbiota, with a key role in the interplay of immunity and metabolism and an emerging role as a biomarker for inflammatory and metabolic disorders in middle-aged adults. The relationship between plasma succinate levels and cardiovascular disease (CVD) risk in young adults is unknown.

Methods: Cross-sectional study in 100 (65% women) individuals aged 18-25 years from the ACTIvating Brown Adipose Tissue through Exercise (ACTIBATE) study cohort. Read More

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Evaluating and Managing the Painful Total Ankle Replacement.

Foot Ankle Int 2021 Jul 27:10711007211027273. Epub 2021 Jul 27.

Hospital for Special Surgery, New York, NY, USA.

The number of total ankle replacements (TARs) performed in the United States has dramatically increased in the past 2 decades due to improvements in implant design and surgical technique. Yet as the prevalence of TAR increases, so does the likelihood of encountering complications and the need for further surgery. Patients with new-onset or persistent pain after TAR should be approached systematically to identify the cause: infection, fracture, loosening/subsidence, cysts/osteolysis, impingement, and nerve injury. Read More

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Mechanisms underlying operational energy consumption of buildings for low carbon city construction: A review.

Ying Yong Sheng Tai Xue Bao 2021 Jul;32(7):2644-2652

Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, Fujian, China.

With rapid urbanization, the increasing building stock, building operation energy consumption and the corresponding carbon emissions have become the important factors restricting the sustainable development of cities. To reduce energy consuming, it is necessary to explore the mechanisms underlying building's operational energy consumption and carbon emission. Although previous studies have analyzed the influencing factors and driving mechanism of urban building carbon emission from different perspectives, a systematical review of the relevant studies which could provide comprehensive guidance for building energy conservation and consumption reduction is fairly scarce. Read More

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Emission characteristics of water-soluble ions in PM released by forest fuel combustion in Great Xing'an Mountains, Inner Mongolia, China.

Ying Yong Sheng Tai Xue Bao 2021 Jul;32(7):2316-2324

College of Forestry, Inner Mongolia Agricultural University, Hohhot 010019, China.

Understanding the emission factors of fine particulate matter (PM) released by forest fuel combustion is important for revealing the impacts of forest fire on atmosphere and ecosystem. Water-soluble ions are important components of fine particulate matter, with great significance to the formation of particulate matter. A self-designed biomass combustion system was used to simulate the combustion of three components (trunks, branches, barks) and their surface dead fuel (litter, semi-humus, humus) of five tree species (, , , , ) and branches of three shrub species (, , ) in Great Xing'an Mountains in Inner Mongolia. Read More

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FDG-PET predicts bone invasion and prognosis in patients with oral squamous cell carcinoma.

Sci Rep 2021 Jul 26;11(1):15153. Epub 2021 Jul 26.

School of Dentistry, China Medical University, Taichung, Taiwan.

F-fluorodeoxyglucose-positron emission tomography (FDG-PET) is widely used for tumor staging. This study sought to determine the relationship of preoperative primary tumor SUVmax (tSUVmax) with the clinicopathological features of patients with OSCC and to compare the prognostic ability of tSUVmax with that of other recurrence factors. Data of 340 patients with OSCC who were diagnosed, treated, and followed up at the Changhua Christian Hospital were retrospectively analyzed. Read More

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Model assisted identification of NO mitigation strategies for full-scale reject water treatment plants.

Water Sci Technol 2021 Jul;84(2):349-363

Institute for Sanitary Engineering and Waste Management, Leibniz University Hanover (ISAH), Welfengarten 1, 30163 Hannover, Germany.

In a 3-year research project, a new approach to forecast biological NO formation and emission at high-strength reject water treatment has been developed (ASM3/1_N2O). It was calibrated by extensive batch-tests and finally evaluated by long-term measurement campaigns realized at three wastewater treatment plants (WWTPs) with different process configurations for nitrogen removal of reject water. To enable a model application with common full-scale data, the nitritation-connected supplementary processes that are responsible for NO formation are not depicted in the model. Read More

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Systematic Review of Different Neuroimaging Correlates in Mild Cognitive Impairment and Alzheimer's Disease.

Clin Neuroradiol 2021 Jul 23. Epub 2021 Jul 23.

Centre for Advanced Research in Imaging, Neuroscience and Genomics (CARING), Mahajan Imaging, New Delhi, India.

Alzheimer's disease (AD) is a heterogeneous progressive neurocognitive disorder. Although different neuroimaging modalities have been used for the identification of early diagnostic and prognostic factors of AD, there is no consolidated view of the findings from the literature. Here, we aim to provide a comprehensive account of different neural correlates of cognitive dysfunction via magnetic resonance imaging (MRI), diffusion tensor imaging (DTI), functional MRI (fMRI) (resting-state and task-related), positron emission tomography (PET) and magnetic resonance spectroscopy (MRS) modalities across the cognitive groups i. Read More

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Review: Genetic selection of high-yielding dairy cattle toward sustainable farming systems in a rapidly changing world.

Animal 2021 Jul 19:100292. Epub 2021 Jul 19.

Centre for Genetic Improvement of Livestock, Department of Animal Biosciences, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G 2W1, Canada.

The massive improvement in food production, as a result of effective genetic selection combined with advancements in farming practices, has been one of the greatest achievements of modern agriculture. For instance, the dairy cattle industry has more than doubled milk production over the past five decades, while the total number of cows has been reduced dramatically. This was achieved mainly through the intensification of production systems, direct genetic selection for milk yield and a limited number of related traits, and the use of modern technologies (e. Read More

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A review in radiomics: Making personalized medicine a reality via routine imaging.

Med Res Rev 2021 Jul 26. Epub 2021 Jul 26.

Radiomics (Oncoradiomics SA), Liège, Belgium.

Radiomics is the quantitative analysis of standard-of-care medical imaging; the information obtained can be applied within clinical decision support systems to create diagnostic, prognostic, and/or predictive models. Radiomics analysis can be performed by extracting hand-crafted radiomics features or via deep learning algorithms. Radiomics has evolved tremendously in the last decade, becoming a bridge between imaging and precision medicine. Read More

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[Spatial Distribution Pattern and Influencing Factors of Industrial Pollution Emissions in Yangtze River Economic Belt].

Huan Jing Ke Xue 2021 Aug;42(8):3820-3828

Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China.

The development of Yangtze River economic belt emphasizes the strategy of "no large-scale development, joint efforts in large-scale protection". The restoration of the Yangtze River environment has become an important part of the development of the region. Therefore, it is important to explore the spatial distribution of industrial pollution emissions and its influencing factors in the Yangtze River economic belt. Read More

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Assessment of the Multiphase Mechanical Properties of the Longmaxi Formation Shale Using Nanoindentation Tests.

ACS Omega 2021 Jul 5;6(28):18200-18214. Epub 2021 Jul 5.

School of Petrochemical Engineering & Environment, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China.

Mechanical properties are some of the most important parameters for understanding well drilling and hydraulic fracturing designs in unconventional reservoir development. As an effective tool, nanoindentation has been used to determine the mechanical properties of rocks at the nanoscale. In this study, the Longmaxi Formation shale samples from the Yibin area of China were collected and analyzed to obtain the multiphase mechanical properties. Read More

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A study on the effects of meteorological and climatic factors on the COVID-19 spread in Canada during 2020.

J Environ Health Sci Eng 2021 Jul 16:1-9. Epub 2021 Jul 16.

School of Statistics and Applied Mathematics, Anhui University of Finance and Economics, Bengbu, 233030 People's Republic of China.

The Coronavirus (COVID-19) pandemic has infected more than three million people, with thousands of deaths and millions of people into quarantine. In this research, the authors focus on meteorological and climatic factors on the COVID-19 spread, the main parameters including daily new cases of COVID-19, carbon dioxide (CO) emission, nitrogen dioxide (NO), Sulfur dioxide (SO), PM, Ozone (O), average temperature, and humidity are examined to understand how different meteorological parameters affect the COVID-19 spread in Canada? The graphical quantitative analysis results indicate that CO emissions, air quality, temperature, and humidity have a direct negative relationship with COVID-19 infections. Quantile regression analysis revealed that air quality, Nitrogen, and Ozone significantly induce the COVID-19 spread across Canadian provinces. Read More

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Recurrent Lobar Hemorrhages and Multiple Cortical Superficial Siderosis in a Patient of Alzheimer's Disease With Homozygous APOE ε2 Allele Presenting Hypobetalipoproteinemia and Pathological Findings of F-THK5351 Positron Emission Tomography: A Case Report.

Front Neurol 2021 7;12:645625. Epub 2021 Jul 7.

Department of Neurology, Gunma University Graduate School of Medicine, Maebashi, Japan.

In Alzheimer's disease, the apolipoprotein E gene ε2 allele is a protective genetic factor, whereas the ε4 allele is a genetic risk factor. However, both the ε2 and the ε4 alleles are genetic risk factors for lobar intracerebral hemorrhage. The reasons for the high prevalence of lobar intracerebral hemorrhage and the low prevalence of Alzheimer's disease with the ε2 allele remains unknown. Read More

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Highly sensitive detection for alkaline phosphatase using doped ZnS quantum dots with room temperature phosphorescence and its logic gate function.

Colloids Surf B Biointerfaces 2021 Jul 7;206:111968. Epub 2021 Jul 7.

Chemistry Department, Memorial University of Newfoundland, St. John's, NL, A1B 3X7, Canada.

This paper presents a highly sensitive sensing system for alkaline phosphatase by room temperature phosphorescence of Mn doped ZnS quantum dots and pyrophosphate. The sensing system has intense room temperature phosphorescence emission in the absence of alkaline phosphatase. The phosphorescence is quenched gradually with the addition of alkaline phosphatase. Read More

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Regional disparity in clinker emission factors and their potential reduction in China.

Environ Sci Pollut Res Int 2021 Jul 23. Epub 2021 Jul 23.

MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing, 100037, China.

Detailed analysis the disparity and reduction potential of clinker emission factors at the provincial level is important for regional reduction policies. Using the surveyed data from 185 new suspension and pre-heater (NSP) process lines and 69 shaft kiln lines, this study firstly analyzed the disparity in emission factors based on production process, production scale, and regional distribution in 2015. We found that the emission factor of the shaft kiln process (898. Read More

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A Path to Qualification of PET/MR Scanners for Multicenter Brain Imaging Studies: Evaluation of MR-based Attenuation Correction Methods Using a Patient Phantom.

J Nucl Med 2021 Jul 22. Epub 2021 Jul 22.

University of California, San Francisco.

Positron emission tomography and magnetic resonance imaging (PET/MRI) scanners cannot be qualified in the manner adopted for hybrid PET and computed tomography (CT) devices. The main hurdle with qualification in PET/MRI is that attenuation correction (AC) cannot be adequately measured in conventional PET phantoms due to the difficulty in converting the MRI images of the physical structures (e.g. Read More

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Qualitative Study on the Observations of Emissions, Transport, and the Influence of Climatic Factors from Sugarcane Burning: A South African Perspective.

Int J Environ Res Public Health 2021 Jul 19;18(14). Epub 2021 Jul 19.

School of Geography, Archaeology and Environmental Studies, University of the Witwatersrand, Johannesburg 2050, South Africa.

There are two methods of harvesting sugarcane-manual or mechanical. Manual harvesting requires the burning of the standing sugarcane crop. Burning of the crop results in the emission of aerosols and harmful trace gases into the atmosphere. Read More

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VOCs Are Relevant Biomarkers of Elicitor-Induced Defences in Grapevine.

Molecules 2021 Jul 13;26(14). Epub 2021 Jul 13.

Agroécologie, AgroSup Dijon, CNRS, INRAE, Univ. Bourgogne, Univ. Bourgogne Franche-Comté, 21000 Dijon, France.

Grapevine is susceptible to fungal diseases generally controlled by numerous chemical fungicides. Elicitors of plant defence are a way of reducing the use of these chemicals, but still provide inconsistent efficiency. Easy-to-analyse markers of grapevine responses to elicitors are needed to determine the best conditions for their efficiency and position them in protection strategies. Read More

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The evaluation of GHG emissions from Shanghai municipal wastewater treatment plants based on IPCC and operational data integrated methods (ODIM).

Sci Total Environ 2021 Jul 9;797:148967. Epub 2021 Jul 9.

State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.

Due to the rapid wastewater treatment plants (WWTPs) development and the China's 2060 goal of carbon neutrality, the contribution of greenhouse gas (GHG) emissions from WWTPs should not be overlooked. Thus, the GHG accounting method, featured with site-specific and real operation data targeting city-level WWTPs, is scientifically and pragmatically called for. In this paper, we compared IPCC (IPCC 2006 and IPCC 2019), optimized IPCC and operational data integrated methods (ODIM) for the direct NO and CH emissions for total 50 WWTPs in Shanghai. Read More

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Lung Cancer Risk in Suspicious Lung Nodules With Negative Positron Emission Tomography Scan.

Ann Thorac Surg 2021 Jul 20. Epub 2021 Jul 20.

Division of Thoracic Surgery, Department of Surgery, Boston University School of Medicine, Boston, MA. Electronic address:

Background: Lung CT Screening Reporting and Data System (LungRADS) Category 4 represents lung nodules with the highest likelihood of cancer. For LungRADS-4 lesions, if positron emission tomography (PET) is negative, there currently exists no uniform guideline on subsequent follow-up, particularly whether the surveillance interval can be extended. We sought to investigate the incidence of cancer, our surveillance practice and any clinical factors associated with cancer in this patient subset. Read More

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Antioxidant and anti-aging carbon quantum dots using tannic acid.

Nanotechnology 2021 Jul 23;32(41). Epub 2021 Jul 23.

Department of Nanoscience and Engineering, Inje University, Gimhae, 50834, Republic of Korea.

Overexpression of collagenase, elastase, and tyrosinase is caused by external factors such as ultraviolet (UV) radiation and stress, resulting in wrinkle formation and freckles through the loss of skin elasticity and skin pigmentation. In this study, we developed novel carbon quantum dots (CQDs) with antioxidant and anti-aging properties using tannic acid as a carbon source through a simple microwave-assisted pyrolysis method. The synthesized tannic acid-derived CQDs (T-CQDs) showed bright blue fluorescence (QY = 28. Read More

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Atomic Regulation of PGM Electrocatalysts for the Oxygen Reduction Reaction.

Front Chem 2021 6;9:699861. Epub 2021 Jul 6.

Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, Experimental Center of Advanced Materials, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, China.

With the increasing enthusiasm for the hydrogen economy and zero-emission fuel cell technologies, intensive efforts have been dedicated to the development of high-performance electrocatalytic materials for the cathodic oxygen reduction reaction (ORR). Some major fundamental breakthroughs have been made in the past few years. Therefore, reviewing the most recent development of platinum-group-metal (PGM) ORR electrocatalysts is of great significance to pushing it forward. Read More

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Changes of renal function after retrograde intrarenal surgery using flexible ureteroscope in renal stone patients.

Transl Androl Urol 2021 Jun;10(6):2320-2331

Department of Urology, Institute of Urology (Laboratory of Reconstructive Urology), West China Hospital, Sichuan University, Chengdu, China.

Background: Retrograde intrarenal surgery (RIRS) is widely performed for renal stones. Theoretically, removing renal stones could prevent the deterioration of renal function. However, two studies reported that not all patients would see an increase in renal function after RIRS. Read More

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Hypoxia and glucose metabolism assessed by FMISO and FDG PET for predicting IDH1 mutation and 1p/19q codeletion status in newly diagnosed malignant gliomas.

EJNMMI Res 2021 Jul 21;11(1):67. Epub 2021 Jul 21.

Department of Neurological Surgery, Faculty of Medicine, Kagawa University, Miki-cho, Kagawa, Japan.

Background: Tumor hypoxia and glycolysis have been recognized as determinant factors characterizing tumor aggressiveness in malignant gliomas. To clarify in vivo hypoxia and glucose metabolism in relation to isocitrate dehydrogenase (IDH) mutation and chromosome 1p and 19q (1p/19q) codeletion status, we retrospectively analyzed hypoxia as assessed by positron emission tomography (PET) with [F]-fluoromisonidazole (FMISO) and glucose metabolism as assessed by PET with [F]-fluoro-2-deoxy-D-glucose (FDG) in newly diagnosed malignant gliomas.

Methods: In total, 87 patients with newly diagnosed supratentorial malignant (WHO grade III and IV) gliomas were enrolled in this study. Read More

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Investigation of F and Zr Isotopes Self-Absorption and Dose Rate Parameters for PET Imaging.

Dose Response 2021 Jul-Sep;19(3):15593258211028467. Epub 2021 Jul 9.

School of Medicine, Royal College of Surgeons in Ireland-Bahrain, Adliya, Bahrain.

This work concerns study of self-absorption factor (SAF) and dose rate constants of zirconium-89 (Zr) for the purpose of radiation protection in positron emission tomography (PET) and to compare them with those of F-deoxyglucose (F-FDG). We analyzed the emitted energy spectra by F and Zr through anthropomorphic phantom and calculated the absorbed energy using Monte Carlo method. The dose rate constants for both radionuclides were estimated with 2 different fluence-to-effective dose conversion coefficients. Read More

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Serum zinc status is a matter of concern among children and non-pregnant women in a nationwide survey of Nepal.

Sci Rep 2021 Jul 21;11(1):14904. Epub 2021 Jul 21.

Department of Health Services, Ministry of Health and Population, Kathmandu, Nepal.

Nationally representative population data on zinc status in Nepal is lacking at present. This study analyzed data from the recent Nepal National Micronutrient status survey 2016 to determine the prevalence of zinc deficiency and associated risk factors among children aged 6-59 months (n = 1462) and non-pregnant women aged 15-49 years (n = 1923). Venous blood was collected from the participants to measure micronutrients such as zinc, markers of anemia, RBP (vitamin A), and markers of inflammation. Read More

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Indoor NH3 variation and its relationship with outdoor NH3 in urban Beijing.

Indoor Air 2021 Jul 21. Epub 2021 Jul 21.

Institute of Atmospheric Composition, Chinese Academy of Meteorological Sciences, Beijing, China.

Online measurements of indoor and outdoor ammonia (NH ) were conducted at a university building in Haidian District, Beijing, to investigate their variation characteristics, indoor-outdoor differences, influencing factors, and possible contribution of indoor NH to atmospheric NH . Indoor NH3 mixing ratios varied greatly among the rooms of the same building. Indoor NH mixing ratio peaked at 1. Read More

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