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Artículos de revistas sobre el tema "Relation n-aire"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 10 de febrero de 2022

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1

Bonetto, Fabienne. "Équilibres multiples et poids de l’histoire: Quelle responsabilité pour la politique économique?" Panoeconomicus 54, no. 2 (2007): 159–84. http://dx.doi.org/10.2298/pan0702159b.

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(francuski) En formalisant une dynamique ? effets de seuil, les mod?les ? ?quilibres multiples enrichissent le paradigme de la croissance endog?ne; l?objectif de cet article est de montrer qu?ils renforcent ?galement la responsabilit? de la politique ?conomique. En effet, d?s lors que les conditions initiales s?lectionnent l??quilibre de long terme, l?histoire de la politique publique d?investissement (au sens large) devient d?terminante. Par ailleurs l?intervention publique peut permettre la sortie de la trappe de pauvret?. Sur la p?riode 1970-1995, nous testons l?hypoth?se d?effets de seuil
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2

Maciá Andreu, María José, Javier Sánchez-Sánchez, José Antonio García Córdoba, and Ana María Gallardo Guerrero. "Análisis de la seguridad y accesibilidad de los espacios deportivos en Educación Secundaria Obligatoria." Cuadernos de Psicología del Deporte 21, no. 1 (2021): 242–57. http://dx.doi.org/10.6018/cpd.395671.

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Las instalaciones deportivas escolares son el marco idóneo donde los alumnos deben de adquirir los hábitos de actividad física, estableciendo el Real Decreto 132/2010, que estas deben de cumplir con las condiciones de seguridad y accesibilidad que determine la legislación vigente. No obstante, varias investigaciones previas alertan del incumplimiento de dichos requisitos, siendo el objetivo del presente estudio el análisis de aquellos relacionados con la seguridad y accesibilidad de los espacios deportivos utilizados para impartir las clases de Educación Física en la etapa de Educación Secunda
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3

Majima, Yuichi, Kazuhiko Takeuchi, Yukiyoshi Hamaguchi, Atsuhito Morishita, Keisuke Hirata, and Yasuo Sakakura. "Hearing Impairment in Relation to Viscoelasticity of Middle Ear Effusions in Children." Annals of Otology, Rhinology & Laryngology 97, no. 3 (1988): 272–74. http://dx.doi.org/10.1177/000348948809700311.

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Both dynamic viscosity (n′) and elasticity (G′) of middle ear effusion were measured with an oscillating sphere magnetic rheometer and compared with the degree of conductive hearing loss in 65 ears of 40 children. There was a significant correlation between n′ and the magnitude of the air-bone gap at 500 and 1,000 Hz, but there was no significant correlation between G′ and the magnitude of the air-bone gap at 2,000 or 4,000 Hz. No significant correlation was noted between G′ and the magnitude of the air-bone gap at 500,1,000, 2,000, or 4,000 Hz. These results indicate that the n′ of middle ear
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4

Karunaratne, K. C., and C. R. Burn. "Relations between air and surface temperature in discontinuous permafrost terrain near Mayo, Yukon Territory." Canadian Journal of Earth Sciences 41, no. 12 (2004): 1437–51. http://dx.doi.org/10.1139/e04-082.

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The association of site characteristics with the n-factor, a ratio of air to ground surface temperature, was investigated at five sites in the boreal forest near Mayo, Yukon Territory. Permafrost was in equilibrium with surface conditions at three sites, was degrading at another, and was absent from the fifth. Air and near-surface ground temperatures were recorded by data loggers between September 2000 and April 2002, and mean daily temperatures were accumulated to calculate n-factors for the freezing (nf) and thawing (nt) seasons. Air temperature did not vary between the sites, so inter-site
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5

Frankel, Mika, Gabriel Bekö, Michael Timm, Sine Gustavsen, Erik Wind Hansen, and Anne Mette Madsen. "Seasonal Variations of Indoor Microbial Exposures and Their Relation to Temperature, Relative Humidity, and Air Exchange Rate." Applied and Environmental Microbiology 78, no. 23 (2012): 8289–97. http://dx.doi.org/10.1128/aem.02069-12.

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ABSTRACTIndoor microbial exposure has been related to adverse pulmonary health effects. Exposure assessment is not standardized, and various factors may affect the measured exposure. The aim of this study was to investigate the seasonal variation of selected microbial exposures and their associations with temperature, relative humidity, and air exchange rates in Danish homes. Airborne inhalable dust was sampled in five Danish homes throughout the four seasons of 1 year (indoors,n= 127; outdoors,n= 37). Measurements included culturable fungi and bacteria, endotoxin,N-acetyl-beta-d-glucosaminida
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6

Tremblay, Maryse. "Décisions rendues par le Conseil canadien des relations du travail." Articles 46, no. 1 (2005): 204–14. http://dx.doi.org/10.7202/050651ar.

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Suite à la déréglementation dans le secteur du transport en 1987, Air Canada a voulu s'allier à des transporteurs régionaux en vue de combattre la concurrence. Elle a conclu des ententes avec eux et investi d'importantes sommes en vue de l'élaboration d'un réseau liaison. Face à cette nouvelle situation, l'Association internationale des machinistes et des travailleurs de l'aérospatiale, district n ° 148, agent négociateur actuel d'environ 8 000 employés d'Air Canada, a décidé d'adresser une demande au Conseil afin qu'il déclare qu'Air Canada, Air BC, Air Nova et Air Ontario constituent un empl
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7

Tseng, C. M., C. S. Liu, and C. Lamborg. "Seasonal changes in gaseous elemental mercury in relation to monsoon cycling over the northern South China Sea." Atmospheric Chemistry and Physics 12, no. 16 (2012): 7341–50. http://dx.doi.org/10.5194/acp-12-7341-2012.

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Abstract. The distribution of gaseous elemental mercury (GEM) was determined in the surface atmosphere of the northern South China Sea (SCS) during 12 SEATS cruises between May 2003 and December 2005. The sampling and analysis of GEM were performed on board ship by using an on-line mercury analyzer (GEMA). Distinct annual patterns were observed for the GEM with a winter maximum of 5.7 ± 0.2 ng m−3 (n = 3) and minimum in summer (2.8 ± 0.2; n = 3), with concentrations elevated 2–3 times global background values. Source tracking through backward air trajectory analysis demonstrated that during th
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8

Ghaffar, Zulkifli Abdul, Salmiah Kasolang, Ahmad Hussein Abdul Hamid, and Mohd Syazwan Firdaus Mat Rashid. "Effect of Dimensionless Numbers on Air Core Diameter of Pressure-Swirl Atomizer." Applied Mechanics and Materials 899 (June 2020): 22–28. http://dx.doi.org/10.4028/www.scientific.net/amm.899.22.

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Air core is an important parameter in pressure swirl atomizer since formation of air core determines the thickness of the discharged liquid sheet and the effective flow area of nozzle discharge. This consequently will affect the coefficient of discharge and the spray angle. This study conducted for the investigation of the relation between dimensionless numbers on the air core diameter. Dimensionless numbers are helpful aid for the quantification of independent parameters involving atomizer design and operating conditions simultaneously. Reynolds number, Re and orifice-to-swirl chamber diamete
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9

LI, Y. T., and R. WONG. "GLOBAL ASYMPTOTICS OF STIELTJES–WIGERT POLYNOMIALS." Analysis and Applications 11, no. 05 (2013): 1350028. http://dx.doi.org/10.1142/s0219530513500280.

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Asymptotic formulas are derived for the Stieltjes–Wigert polynomials Sn(z; q) in the complex plane as the degree n grows to infinity. One formula holds in any disc centered at the origin, and the other holds outside any smaller disc centered at the origin; the two regions together cover the whole plane. In each region, the q-Airy function Aq(z) is used as the approximant. For real x > 1/4, a limiting relation is also established between the q-Airy function Aq(x) and the ordinary Airy function Ai (x) as q → 1.
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10

Tseng, C. M., C. S. Liu, and C. Lamborg. "Seasonal changes in gaseous elemental mercury in relation to monsoon cycling over the Northern South China Sea." Atmospheric Chemistry and Physics Discussions 12, no. 5 (2012): 12203–27. http://dx.doi.org/10.5194/acpd-12-12203-2012.

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Abstract. The distribution of gaseous elemental mercury (GEM) was determined in the surface atmosphere of the Northern South China Sea (SCS) during 12 SEATS cruises between May 2003 and December 2005. The sampling and analysis of GEM were performed on board ship by using an on-line mercury analyzer (GEMA). Distinct annual patterns were observed for the GEM with a winter maximum of 5.7 ± 0.2 ng m−3 (n = 3) and low in summer (2.8 ± 0.2) (n = 3), with concentrations elevated 2 ∼ 3 times global background values. Source tracking through backward trajectory analysis demonstrated air masses during t
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11

Goia, Ioan Augustin. "Considerații privind potențialul identitar al arhitecturii rurale tradiționale." Anuarul Muzeului Etnograif al Transilvaniei 29 (December 20, 2015): 94–99. http://dx.doi.org/10.47802/amet.2015.29.07.

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L'auteur considère que le sentiment individuel d'appartenance à une communauté circonscrite spatialement et culturellement est généré par certains facteurs, qu'il énumère. Il remarque l'existence d'une tendance contemporaine d'attribuer à l'espace rural traditionnel un potentiel identitaire supérieur à l'espace urbain, parce que ce dernier a généré des valeurs culturelles semblables sur des aires beaucoup trop larges. La tendance mentionnée est générée, en principal, par l'existence, dans des espaces ruraux restreints, d'un certain rapport caractéristique, parfois unique, entre le paysage natu
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12

Van Dingenen, R., J. P. Putaud, S. Martins-Dos Santos, and F. Raes. "Physical aerosol properties and their relation to air mass origin at Monte Cimone (Italy) during the first MINATROC campaign." Atmospheric Chemistry and Physics 5, no. 8 (2005): 2203–26. http://dx.doi.org/10.5194/acp-5-2203-2005.

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Abstract. Aerosol physical properties were measured at the Monte Cimone Observatory (Italy) from 1 June till 6 July 2000. The measurement site is located in the transition zone between the continental boundary layer and the free troposphere (FT), at the border between the Mediterranean area and Central Europe, and is exposed to a variety of air masses. Sub-μm number size distributions, aerosol hygroscopicity near 90% RH, refractory size distribution at 270°C and equivalent black carbon mass were continuously measured. Number size distributions and hygroscopic properties indicate that the site
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13

Zhang, Lin, та Zong Yu Chen. "The Relation between δ18O of Precipitation and Air Temperature in Northern China". Advanced Materials Research 233-235 (травень 2011): 462–65. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.462.

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The relation between isotopic compositions of precipitation and surface air temperature provides an unique tool for paleoclimate studies. Ananysis was conducted of monthly and annual mean d18O content of precipitation and surface air temperature for spatial and a fixed location by using the the data of China (1985~2002) in Global Network of Isotopes in Precipitation (GNIP) Database.This study shows that there is a positive correlation between d18O of precipitation and surface air temperature for those stations whose latitude is higher than 34°~36°N. The seasonal d18O-temperature gradient deriv
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14

Throop, Jennifer, Antoni G. Lewkowicz, and Sharon L. Smith. "Climate and ground temperature relations at sites across the continuous and discontinuous permafrost zones, northern Canada1This article is one of a series of papers published in this CJES Special Issue on the theme of Fundamental and applied research on permafrost in Canada.2Earth Science Sector (ESS) Contribution 20110128." Canadian Journal of Earth Sciences 49, no. 8 (2012): 865–76. http://dx.doi.org/10.1139/e11-075.

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Climate – ground temperature relations are examined under a range of conditions for 10 sites across northern Canada. The sites are located between 60°N and 83°N and at elevations of 40 to 1840 m above sea level. They encompass various environmental and climatic conditions, with permafrost temperatures that range from just below 0 to –15 °C. The substrates range from bedrock to fine-grained sediment with high ice content, and vegetation types include coniferous forests in the Mackenzie Valley, shrub tundra at high elevation in the southern Yukon Territory, and polar desert in the High Arctic. P
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15

Kampel-Furman, Liyona, Z. Joachims, H. Bar-Cohen, et al. "Hearing threshold shifts among military pilots of the Israeli Air Force." Journal of the Royal Army Medical Corps 164, no. 1 (2017): 46–51. http://dx.doi.org/10.1136/jramc-2016-000758.

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BackgroundMilitary aviators are potentially at risk for developing noise-induced hearing loss. Whether ambient aircraft noise exposure causes hearing deficit beyond the changes attributed to natural ageing is debated. The aim of this research was to assess changes in hearing thresholds of Israeli Air Force (IAF) pilots over 20 years of military service and identify potential risk factors for hearing loss.MethodsA retrospective cohort analysis was conducted of pure-tone air conduction audiograms of pilots, from their recruitment at 18 years of age until the last documented medical check-up. Mea
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16

Dakora, FD, and CA Atkins. "Diffusion of Oxygen in Relation to Structure and Function in Legume Root Nodules." Functional Plant Biology 16, no. 1 (1989): 131. http://dx.doi.org/10.1071/pp9890131.

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Although substantial rates of oxidative phosphorylation by bacteroids of Rhizobium are required to support sustained N2 fixation in legume nodules, the enzyme nitrogenase is extremely sensitive to oxygen. This apparent paradox indicates that nodules must exercise effective control over internal oxygen concentration. Structural features including lenticel development, the thickness and arrangement of cells and air spaces in the inner and outer cortex, the presence or completeness of the common endodermis as well as the distribution of infected cells, uninfected cells and air spaces in the nodul
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17

Awan, Faraz Malik, Roberto Minerva, and Noel Crespi. "Improving Road Traffic Forecasting Using Air Pollution and Atmospheric Data: Experiments Based on LSTM Recurrent Neural Networks." Sensors 20, no. 13 (2020): 3749. http://dx.doi.org/10.3390/s20133749.

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Traffic flow forecasting is one of the most important use cases related to smart cities. In addition to assisting traffic management authorities, traffic forecasting can help drivers to choose the best path to their destinations. Accurate traffic forecasting is a basic requirement for traffic management. We propose a traffic forecasting approach that utilizes air pollution and atmospheric parameters. Air pollution levels are often associated with traffic intensity, and much work is already available in which air pollution has been predicted using road traffic. However, to the best of our knowl
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18

Yu, Rucong, and Jian Li. "Hourly Rainfall Changes in Response to Surface Air Temperature over Eastern Contiguous China." Journal of Climate 25, no. 19 (2012): 6851–61. http://dx.doi.org/10.1175/jcli-d-11-00656.1.

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Abstract In this study, late-summer rainfall over eastern contiguous China is classified according to hourly intensity and the changes of moderate, intense, and extreme precipitation in response to variation of surface air temperature are analyzed. The e-folding decay intensity (Imi) derived from the exponential distribution of rainfall amount is defined as the threshold that partitions rainfall into moderate and intense rainfall, and the double e-folding decay intensity (Ie) is used as the threshold to pick out extreme cases. The mean values of Imi and Ie are about 12 and 24 mm h−1, respectiv
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19

Karaca, Çiğdem Tepe, Erdoğan Gültekin, M. Kürşat Yelken, Ayşenur Akyıldız İğdem, and Mehmet Külekçi. "Long-Term Histologic Changes in Nasal Mucosa after Total Laryngectomy." International Journal of Otolaryngology 2010 (2010): 1–4. http://dx.doi.org/10.1155/2010/137128.

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Objective. To determine the long-term histopathologic changes in nasal mucosa and the relationship between progression of the histopathologic changes and the duration without air current stimulation.Material and Method. Biopsies were taken from the inferior turbinates of 11 laryngeal cancer patients after total laryngectomy. Specimens were stained with hematoksilen-eosin and several histopathologic parameters were examined under light microscopy.Results. All of the patients demonstrated at least one histopathologic abnormality (100%,n=11). Goblet destruction and stromal fibrosis were the most
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20

Seneweera, Saman P., Oula Ghannoum, Jann P. Conroy, et al. "Changes in source–sink relations during development influence photosynthetic acclimation of rice to free air CO2 enrichment (FACE)." Functional Plant Biology 29, no. 8 (2002): 947. http://dx.doi.org/10.1071/pp01250.

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Relationships between photosynthetic acclimation and changes in the balance between source-sink supply and demand of carbon (C) and nitrogen (N) were tested using rice (Oryza sativa L. cv. Akitakomachi). Plants were field-grown in northern Japan at ambient CO2 partial pressure [p(CO2)] or free air CO2 enrichment (FACE; p(CO2) ~ 26-32 Pa above ambient) with low, medium or high N supplies. Leaf CO2 assimilation rates (A) and biochemical parameters were measured at 32-36 (eighth leaf) and 76-80 (flag leaf) d after transplanting, representing stages with a contrasting balance between C and N suppl
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21

Bubendorf, Alexandre, Stefan Walheim, Thomas Schimmel, and Ernst Meyer. "A robust AFM-based method for locally measuring the elasticity of samples." Beilstein Journal of Nanotechnology 9 (January 2, 2018): 1–10. http://dx.doi.org/10.3762/bjnano.9.1.

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Investigation of the local sample elasticity is of high importance in many scientific domains. In 2014, Herruzo et al. published a new method based on frequency-modulation atomic force microscopy to locally determine the elasticity of samples (Nat. Commun. 2014, 5, 3126). This method gives evidence for the linearity of the relation between the frequency shift of the cantilever first flexural mode Δf 1 and the square of the frequency shift of the second flexural mode Δf 2 2. In the present work, we showed that a similar linear relation exists when measuring in contact mode with a certain load F
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22

Gay, Giuliana, Marco Bovio, José Luis Minati, Albino Morando, Vittorino Novello, and Roberto Ambrosoli. "Soil management in relation to training system in a steep vineyard." OENO One 38, no. 1 (2004): 71. http://dx.doi.org/10.20870/oeno-one.2004.38.1.935.

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<p style="text-align: justify;">In the North-West Italy, close spaced and low trunk vines are vertically trellised and Guyot pruned. In these conditions the permanent grass cover may compete with grapevine leaves and clusters for air and light, and with grapevine roots for water and nitrogen. In a « White Muscat » vineyard, grafted onto « 420A », the following soil management techniques were compared: a) permanent grass cover controlled by mowing; b) permanent grass cover controlled by foliar herbicides; c) no tillage using residual + foliar herbicides. The maximum soil cover was found o
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23

Sun, Gavin, Glen Hazlewood, Sasha Bernatsky, Gilaad G. Kaplan, Bertus Eksteen, and Cheryl Barnabe. "Association between Air Pollution and the Development of Rheumatic Disease: A Systematic Review." International Journal of Rheumatology 2016 (2016): 1–11. http://dx.doi.org/10.1155/2016/5356307.

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Objective. Environmental risk factors, such as air pollution, have been studied in relation to the risk of development of rheumatic diseases. We performed a systematic literature review to summarize the existing knowledge.Methods. MEDLINE (1946 to September 2016) and EMBASE (1980 to 2016, week 37) databases were searched using MeSH terms and keywords to identify cohort, case-control, and case cross-over studies reporting risk estimates for the development of select rheumatic diseases in relation to exposure of measured air pollutants (n=8). We extracted information on the population sample and
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24

Isopp, Hubert, Marco Frehner, José P. F. Almeida, et al. "Nitrogen plays a major role in leaves when source-sink relations change: C and N metabolism in Lolium perenne growing under free air CO2 enrichment." Functional Plant Biology 27, no. 9 (2000): 851. http://dx.doi.org/10.1071/pp99151.

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This paper originates from a presentation at the International Conference on Assimilate Transport and Partitioning, Newcastle, NSW, August 1999 Swards of Lolium perenne L. were grown in the field in a long-term free air CO2 enrichment (FACE) facility. The CO2 treatment was combined with two levels of N fertilization and regular defoliation, which resulted in plants with a wide range of source–sink relations. C and N metabolism were investigated to assess the role of carbohydrate and nitrogenous compounds in leaves in indicating source–sink relations. Sucrose exhibited the largest changes in co
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25

Jansen, Joachim, Brett F. Thornton, Alicia Cortés, et al. "Drivers of diffusive CH<sub>4</sub> emissions from shallow subarctic lakes on daily to multi-year timescales." Biogeosciences 17, no. 7 (2020): 1911–32. http://dx.doi.org/10.5194/bg-17-1911-2020.

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Abstract. Lakes and reservoirs contribute to regional carbon budgets via significant emissions of climate forcing trace gases. Here, for improved modelling, we use 8 years of floating chamber measurements from three small, shallow subarctic lakes (2010–2017, n=1306) to separate the contribution of physical and biogeochemical processes to the turbulence-driven, diffusion-limited flux of methane (CH4) on daily to multi-year timescales. Correlative data include surface water concentration measurements (2009–2017, n=606), total water column storage (2010–2017, n=237), and in situ meteorological ob
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26

Dobeic, M., E. Kenda, J. Mičunovič, and I. Zdovc. "Airborne Listeria spp. in the red meat processing industry." Czech Journal of Food Sciences 29, No. 4 (2011): 441–47. http://dx.doi.org/10.17221/88/2010-cjfs.

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The aim of this study was to determine the potential presence of the airborne Listeria spp. and its correlation with the aerobic mesophilic bacteria and Listeria carcass contamination in three red meat slaughtering and three processing plants. Airborne L. seeligeri and L. innocua were determined using 8 (5.06%, n = 158) air samples taken on the locations characteristic for aerosol generating and in a chilly environment. The positive airborne samples of Listeria spp. were in an insignificant (P &amp;gt; 0.05) relation with the highest airborne bacteria counts. On the carcass, only 1 positive ca
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27

Colilla, Susan, Nancy J. Cox, and David A. Ehrmann. "Heritability of Insulin Secretion and Insulin Action in Women with Polycystic Ovary Syndrome and Their First Degree Relatives1." Journal of Clinical Endocrinology & Metabolism 86, no. 5 (2001): 2027–31. http://dx.doi.org/10.1210/jcem.86.5.7518.

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Polycystic ovary syndrome (PCOS), one of the most common endocrine disorders of reproductive age women, is associated with an increased risk of type 2 diabetes mellitus. Defects in both insulin action and insulin secretion contribute to this predisposition to diabetes, but the extent to which these defects are heritable among PCOS families has not been examined. In the present study we used the frequently sampled iv glucose tolerance test to quantitate insulin secretion (AIRg), insulin action (Si), and their product (AIRg × Si) among women with PCOS (n= 33) and their nondiabetic first degree r
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Jerin, Sahajadi, Md Ataul Gani, Md Almujaddade Al Fasane, and Moniruzzaman Khondker. "Dynamics Of Environmental Factors In Relation To Phytoplankton Species In A Pond Of Old Dhaka, Bangladesh." Journal of the Asiatic Society of Bangladesh, Science 42, no. 2 (2016): 169–75. http://dx.doi.org/10.3329/jasbs.v42i2.46220.

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The relationship between different environmental factors and abundance of phytoplankton species was studied for one year in a pond of old Dhaka named Sikkatuli pond. The range of annual mean of different variables in the pond was air and water temperatures 20 - 31.75˚C, secchi depth 21 - 54 cm, pH 7.39 - 8.3, alkalinity 3.9 - 9.2 meq/l, conductivity 484.5 - 2273.34 μS/cm, DO 3.35 - 8.33 mg/l, TDS 224.67 - 380.5 mg/l, SRS 12.03 - 79.93 mg/l, NO3-N 0.18 - 0.435 mg/l, SRP 0.33 – 4.28 μg/l, chlorophyll a 196.08 - 362.76 μg/l and phaeopigment 30.51 - 212.2 μg/l. During the investigation Cryptomonas
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Ren, Xiaodan, Ping Li, Jianbo Li, Xiaoyi Yang, Chaohua Guo, and Quanhong Li. "Effect of Oxyethylene Groups of Fatty Alcohol Polyoxyethylene Ether Sodium Sulfates on Equilibrium and Dynamic Surface Tension in Relation to Wetting Properties." Tenside Surfactants Detergents 58, no. 5 (2021): 394–400. http://dx.doi.org/10.1515/tsd-2020-2343.

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Abstract The effect of hydrophilic chain of surfactants fatty alcohol polyoxyethylene ether sodium sulphates (AEnS, n = 2, 3, 7) on surface properties and wetting properties was investigated by the measurement of equilibrium surface tension, dynamic surface tension and dynamic contact angle. The fatty alcohol polyoxyethylene ether sodium sulphates with different head group sizes were used. From the results of equilibrium surface tension measurements, we could obtain the critical micellisation concentration, adsorption efficiency, maximum surface excess concentration and Langmuir equilibrium ad
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Hertel, O., C. A. Skjøth, S. Reis, et al. "Governing processes for reactive nitrogen compounds in the atmosphere in relation to ecosystem, climatic and human health impacts." Biogeosciences Discussions 9, no. 7 (2012): 9349–423. http://dx.doi.org/10.5194/bgd-9-9349-2012.

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Abstract. Reactive nitrogen (Nr) compounds have different fates in the atmosphere due to differences in governing processes of physical transport, deposition and chemical transformation. Nr compounds addressed here include reduced nitrogen (NHx: ammonia (NH3) and its reaction product ammonium (NH4+)), oxidized nitrogen (NOy: nitrogen monoxide (NO) + nitrogen dioxide (NO2) and their reaction products) as well as organic nitrogen compounds (organic N). Pollution abatement strategies need to take into account these differences in the governing processes of these compounds when assessing their imp
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31

Firman, D. M., P. J. O'Brien, and E. J. Allen. "Appearance and growth of individual leaves in the canopies of several potato cultivars." Journal of Agricultural Science 125, no. 3 (1995): 379–94. http://dx.doi.org/10.1017/s0021859600084884.

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SUMMARYLeaf appearance of contrasting potato cultivars was examined in field experiments at Cambridge, UK, between 1985 and 1990. Three experiments examined the effects of N fertilizer on the appearance and growth of leaves. Four experiments examined leaf appearance over a wide range of planting dates and in two of these experiments different physiological ages of seed were compared.Linear regression of rate of appearance of main-stem leaves on air temperature indicated a strong dependence of rate of leaf appearance on temperature in the cultivar Maris Piper with a phyllochron of c. 31 K d/lea
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32

Camargo-Bortolin, Lívia H. G. de, Carlos H. B. A. Prado, Gustavo M. Souza, and Paula Novaes. "Autonomy and network modulation of photosynthesis and water relations of Coffea arabica in the field." Brazilian Journal of Plant Physiology 20, no. 2 (2008): 141–51. http://dx.doi.org/10.1590/s1677-04202008000200006.

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The degree of connection between leaf gas exchange and leaf water potential, and the autonomy of these variables in relation to meteorological conditions were determined in three cultivars of Coffea arabica during clear and cloudy days. High values of vapor pressure deficit, air temperature and photosynthetic photon flux density resulted in low leaf autonomy during a clear day, irrespective the degree of connection among leaf physiological variables. Tight synchronization between physiological and meteorological variables was considered one important cause of net photosynthesis (P N) decreasin
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33

Aida, Sumihisa, Kiichiro Taga, Tomohiro Yamakura, Hiroshi Endoh, and Koki Shimoji. "Headache after Attempted Epidural Block." Anesthesiology 88, no. 1 (1998): 76–81. http://dx.doi.org/10.1097/00000542-199801000-00014.

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Background Postmeningeal puncture headache (PMPH) is typically attributed to the loss of cerebrospinal fluid (CSF). However, when it occurs after an attempted epidural puncture, it may be due to either CSF loss or, potentially, to the subarachnoid injection of air used as a part of "loss-of-resistance" testing. This study was performed to examine the relation between intrathecal air and PMPH. Methods Using a loss-of-resistance test with an air-filled (n = 1,812; air group) or saline-filled (n = 1,918; saline group) syringe, epidural block was performed in patients with acute or chronic pain. T
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34

Et al., Al Kinani. "Effect of Refractive Index on Photon Natural Mass and Wavelength." Baghdad Science Journal 16, no. 4(Suppl.) (2019): 1017. http://dx.doi.org/10.21123/bsj.2019.16.4(suppl.).1017.

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In this article it is proved experimentally that the photon is a particle that has mass and constant wavelength by explaining the effect of refractive index on the wavelength and the natural mass of photon. It is very difficult to measure the mass of photon, a simple and easy process was proposed in this paper to calculate the mass length of photon in vacuum (Y) and in medium (Y*), by measuring the length of laser beam in air (Lair) and in medium (Lmed). A new method was postulated to calculate refractive index by using these relations (n = Y*/Y), and (n = Lmed / Lair) which supposed a new the
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35

Shawnim, Paybar Ali, and Fouad Mohammad. "COMPRESSIVE STRENGTH OF FOAMED CONCRETE IN RELATION TO POROSITY USING SEM IMAGES." Journal of Civil Engineering, Science and Technology 10, no. 1 (2019): 34–44. http://dx.doi.org/10.33736/jcest.1005.2019.

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Foamed concrete specimens were examined for compressive strength at (28 and 180) days air sealed curing, as well as at 28 days water cured. Also, the microstructure of fifteen selected FC specimens was investigated for porosity in relation to compressive strength using Scanning Electron Microscopy (SEM) images. Twenty two batches of FC specimens of the densities (1100, 1600 and 1800) kg/m3 were made with fine sand and brick aggregates with toner and metakaolin (MK) inclusion as additives, they were casted in polystyrene cube moulds of (100x100x100) mm. Results show, it is possible to produce F
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36

Kirillova, E. N., A. Andersson, J. Han, M. Lee, and Ö. Gustafsson. "Sources and light absorption of water-soluble brown carbon aerosols in the outflow from northern China." Atmospheric Chemistry and Physics Discussions 13, no. 7 (2013): 19625–48. http://dx.doi.org/10.5194/acpd-13-19625-2013.

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Abstract. High loadings of anthropogenic carbonaceous aerosols in Chinese air influence the air quality for over 1 billion people and impact the regional climate. A large fraction (17–80%) of this aerosol carbon is water soluble, promoting cloud formation and thus climate cooling. Recent findings, however, suggest that water-soluble carbonaceous aerosols also absorb sunlight, bringing additional direct and indirect climate warming effects, yet the extent and nature of light absorption by this water-soluble brown carbon (WS-BrC) and its relation to sources is poorly understood. Here, we combine
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37

Barij, Nadia, Jan Čermák, and Alexia Stokes. "Azimuthal variations in xylem structure and water relations in cork oak (Quercus suber)." IAWA Journal 32, no. 1 (2011): 25–40. http://dx.doi.org/10.1163/22941932-90000040.

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Azimuthal variations in xylem conductivity and transpiration can occur in trees and may be due to heterogeneity in environmental factors. In cork oak (Quercus suber L.), it can be hypothesized that such modifications may be more pronounced because the insulating layer of bark is harvested every 9–10 years, thus cambial cells will be exposed to fluctuations in the microenvironment. To investigate whether xylem structure and water relations differed around the stems of mature cork oak, sap flow per section and xylem structure were measured on the northern (N) and southern (S) sides of nine trees
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38

Finell, Eerika, Asko Tolvanen, Juha Pekkanen, Jaana Minkkinen, Timo Ståhl, and Arja Rimpelä. "Psychosocial Problems, Indoor Air-Related Symptoms, and Perceived Indoor Air Quality among Students in Schools without Indoor Air Problems: A Longitudinal Study." International Journal of Environmental Research and Public Health 15, no. 7 (2018): 1497. http://dx.doi.org/10.3390/ijerph15071497.

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The effect of students’ psychosocial problems on their reporting of indoor air quality (subjective IAQ) and indoor air-related (IA-related) symptoms has not been studied in schools in a longitudinal setting. Therefore, we analyzed whether changes in students’ psychosocial problems (socioemotional difficulties and perceived teacher–student relations) between the beginning of seventh grade (age 12–13 years) and the end of ninth grade (15–16 years) predicted subjective IAQ and IA-related symptoms at the end of ninth grade. In order to explore the independent effect of psychosocial factors, we foc
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39

Byčenkienė, Steigvilė, Vadimas Dudoitis, and Vidmantas Ulevicius. "The Use of Trajectory Cluster Analysis to Evaluate the Long-Range Transport of Black Carbon Aerosol in the South-Eastern Baltic Region." Advances in Meteorology 2014 (2014): 1–11. http://dx.doi.org/10.1155/2014/137694.

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Trajectory cluster analysis and source-receptor models (the potential source contribution function (PSCF), concentration weighted trajectories (CWT), and trajectory source apportionment (TSA)) were applied to investigate the source-receptor relationship for the aerosol black carbon (BC) measured at the coastal site (Preila, 55.55°N, 21.04°E) during 2013. The main sources and paths of advection to the south-eastern Baltic region and its relation to black carbon concentration were identified. The 72 h backward trajectories of air masses arriving at Preila from January to December 2013 were deter
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40

Boettcher, Philipp A., Shyam K. Menon, Brian L. Ventura, Guillaume Blanquart, and Joseph E. Shepherd. "Cyclic flame propagation in premixed combustion." Journal of Fluid Mechanics 735 (October 23, 2013): 176–202. http://dx.doi.org/10.1017/jfm.2013.495.

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AbstractIn experiments of hot surface ignition and subsequent flame propagation, a puffing flame instability is observed in mixtures that are stagnant and premixed prior to ignition. By varying the size of the hot surface, power input, and combustion vessel volume, it was determined that the instability is a function of the interaction of the flame, with the fluid flow induced by the combustion products rather than the initial plume established by the hot surface. Pressure ranges from 25 to 100 kPa and mixtures of n-hexane/air with equivalence ratios between $\phi = 0. 58$ and 3.0 at room temp
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41

Kirillova, E. N., A. Andersson, J. Han, M. Lee, and Ö. Gustafsson. "Sources and light absorption of water-soluble organic carbon aerosols in the outflow from northern China." Atmospheric Chemistry and Physics 14, no. 3 (2014): 1413–22. http://dx.doi.org/10.5194/acp-14-1413-2014.

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Abstract. High loadings of anthropogenic carbonaceous aerosols in Chinese air influence the air quality for over one billion people and impact the regional climate. A large fraction (17–80%) of this aerosol carbon is water-soluble, promoting cloud formation and thus climate cooling. Recent findings, however, suggest that water-soluble carbonaceous aerosols also absorb sunlight, bringing additional direct and indirect climate warming effects, yet the extent and nature of light absorption by this water-soluble "brown carbon" and its relation to sources is poorly understood. Here, we combine sour
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42

Knies, Maximilian, Mai Lê Anh, Ulrich Keßler, and Michael Ruck. "Crystal structures of the tetrachloridoaluminates(III) of rubidium(I), silver(I), and lead(II)." Zeitschrift für Naturforschung B 75, no. 1-2 (2020): 117–23. http://dx.doi.org/10.1515/znb-2019-0162.

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AbstractThe reactions of the binary metal chlorides AgCl, RbCl and PbCl2 at T = 180°C in the ionic liquid [BMIm]Cl · 4AlCl3 (BMIm = 1-n-butyl-3-methylimidazolium) yielded air-sensitive, colorless, high-quality crystals of their tetrachloridoaluminate(III) salts. Thereby, the obstructions that hinder proper crystallization of these compounds from pristine AlCl3 melts were circumvented. X-ray diffraction on single-crystals revealed a monoclinic structure (space group P21/c) for Ag[AlCl4], which unexpectedly has a closer relation to Cu[AlCl4]2 than to Cu[AlCl4]. Rb[AlCl4] crystallizes in the bary
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43

Maheu, Maxime, Ahlem Elblidi, and Issam Saliba. "Investigating Performance of cVEMP and oVEMP in the Identification of Superior Canal Dehiscence in Relation to Dehiscence Location and Size." Audiology Research 11, no. 3 (2021): 452–62. http://dx.doi.org/10.3390/audiolres11030042.

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Compare the sensitivity and specificity of cVEMP (500 Hz), oVEMP (500 Hz and 4 kHz) in the identification of SSCD. A secondary objective was to identify the influence of dehiscence size and location on cVEMP and oVEMP responses. Methods: Individuals with unilateral (n = 16) and bilateral (n = 10) scan confirmed SSCD were assessed using air-conducted cVEMP and oVEMP Results: For cVEMP, an amplitude cutoff of 286.9 μV or a threshold cutoff of 67.5 dBnHL revealed, respectively, a sensitivity of 75% and 70.6% and a specificity of 69.4% and 100%. For oVEMP (500 Hz), an amplitude cutoff of 10.8 μV o
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44

Heinzinger, Catherine, Lu Wang, James Bena, et al. "421 Elucidating Circadian and Sleep Phenotypes and Relation to Cognitive Impairment in Alzheimer’s Dementia." Sleep 44, Supplement_2 (2021): A166—A167. http://dx.doi.org/10.1093/sleep/zsab072.420.

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Abstract Introduction Although sleep disruption in Alzheimer’s disease (AD) pathogenesis has been described, the role of circadian rhythm dysfunction (CRD) is less understood. We hypothesize greater CRD and sleep disruption with poorer cognitive function in AD compared to normal cognition. Methods We examined 3 groups:1)mild cognitive impairment with positive AD biomarkers(MCI-AD),n=18, 2)cognitively normal at high risk for AD(HR)(APOEƐ4 carriers),n=19, 3)cognitively normal APOEƐ4 non-carriers(CL),n=16 (National Institute of Aging, IMMUNE-AD). DNA extraction and APOEƐ4 genotyping were performe
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45

Burrows, Rhoda L., and Frank J. Peryea. "Soil Acidification Potential of Four Commercial Nitrogen Solutions Used for Fertigation." HortScience 30, no. 4 (1995): 879D—879. http://dx.doi.org/10.21273/hortsci.30.4.879d.

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Nitrification-induced subsoil acidification is a major problem encountered with the use of ammonium- or urea-containing fertilizer solutions for drip fertigation of tree fruit crops. We conducted a laboratory experiment to evaluate the soil acidification potential of the four fertilizer N solutions most frequently used for fertigation within the Washington tree fruit industry. Treatments were five orchard soils x four commercial N solutions (calcium nitrate, calcium-ammonium nitrate, ammonium nitrate, urea-ammoniun nitrate) x four N rates (0, 100, 200, 500 mg N/kg). Air-dry subsamples of each
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46

Zinck, T., R. Illum, and I. Jansen-Olesen. "Increased Expression of Endothelial and Neuronal Nitric Oxide Synthase In Dura and Pia Mater After Air Stress." Cephalalgia 26, no. 1 (2006): 14–25. http://dx.doi.org/10.1111/j.1468-2982.2005.00978.x.

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Stress is the leading precipitating factor for migraine attacks but the underlying mechanism is currently unknown. Nitric oxide (NO) has been implicated in migraine pathogenesis based on the ability of NO donors to induce migraine attacks. In the present study, we investigated in Wistar rats the effect of air stress on nitric oxide synthase (NOS) mRNA and protein expression in dura and pia mater using real-time polymerase chain reaction and Western blotting, respectively. Endothelial (e)NOS protein expression was significantly increased in dura and pia mater after air stress. Significantly aug
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47

Milovanovic, Bosko, Milan Radovanovic, and Tamara Jojic-Glavonjic. "Linkage between water temperature of the subtropical Atlantic, the Azores maximum and air temperature in Serbia." Glasnik Srpskog geografskog drustva 90, no. 2 (2010): 69–84. http://dx.doi.org/10.2298/gsgd1002069m.

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The paper explores the link between water temperature of the subtropical part of the Atlantic Ocean (the belt of 25 to 40? N), atmospheric pressure and air temperature in Belgrade and Serbia. The main point of the research is to examine the linkage between the Azores air pressure maximum with the changes of water temperature in the subtropical belt of the Atlantic (given in the net 5x5?). Using the hierarchical cluster analyses, 10 clusters of water temperature of the subtropical part of the Atlantic Ocean were selected. Their linkage between the position and the intensity of the Azores maximu
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48

Wu, Xue, Sabine Griessbach, and Lars Hoffmann. "Equatorward dispersion of a high-latitude volcanic plume and its relation to the Asian summer monsoon: a case study of the Sarychev eruption in 2009." Atmospheric Chemistry and Physics 17, no. 21 (2017): 13439–55. http://dx.doi.org/10.5194/acp-17-13439-2017.

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Abstract. Tropical volcanic eruptions have been widely studied for their significant contribution to stratospheric aerosol loading and global climate impacts, but the impact of high-latitude volcanic eruptions on the stratospheric aerosol layer is not clear and the pathway of transporting aerosol from high latitudes to the tropical stratosphere is not well understood. In this work, we focus on the high-latitude volcano Sarychev (48.1° N, 153.2° E), which erupted in June 2009, and the influence of the Asian summer monsoon (ASM) on the equatorward dispersion of the volcanic plume. First, the sul
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49

Clarke, Kayan, Andres Manrique, Tara Sabo-Attwood, and Eric S. Coker. "A Narrative Review of Occupational Air Pollution and Respiratory Health in Farmworkers." International Journal of Environmental Research and Public Health 18, no. 8 (2021): 4097. http://dx.doi.org/10.3390/ijerph18084097.

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The agricultural crop sector in the United States depends on migrant, seasonal, and immigrant farmworkers. As an ethnic minority group in the U.S. with little access to health care and a high level of poverty, farmworkers face a combination of adverse living and workplace conditions, such as exposure to high levels of air pollution, that can place them at a higher risk for adverse health outcomes including respiratory infections. This narrative review summarizes peer-reviewed original epidemiology research articles (2000–2020) focused on respirable dust exposures in the workplace and respirato
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Nurislamova, Tatyana V., Vadim B. Alekseev, Tatyana S. Ulanova, and Olga A. Maltseva. "Chromato-mass-spectrometric identification of asymmetric dimethylhydrazine and N-nitrosodimethylamine." Hygiene and sanitation 100, no. 5 (2021): 422–27. http://dx.doi.org/10.47470/0016-9900-2021-100-5-422-427.

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Introduction. Environmental safety is one of the main priorities of state policy. It ensures the legal regulation of relations in space activities to strengthen the defense and security of the Russian Federation and further extension of the international cooperation of the Russian Federation. Material and methods. In the fall areas of the stages of the booster rockets, screening studies were carried out to identify the propellant component 1.1-unsymmetrical dimethylhydrazine in atmospheric air (n=14) and drinking water (n=23), determine its metabolite N-nitrosodimethylamine quantitatively in t
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