CDOM Absorption Properties of Natural Water Bodies along Extreme Environmental Gradients

We present absorption properties of colored dissolved organic matter (CDOM) sampled in six different water bodies along extreme altitudinal, latitudinal, and trophic state gradients. Three sites are in Norway: the mesotrophic Lysefjord (LF), Samnangerfjord (SF), and Røst Coastal Water (RCW); two sites are in China: the oligotrophic Lake Namtso (LN) and the eutrophic Bohai Sea (BS); and one site is in Uganda: the eutrophic Lake Victoria (LV). The site locations ranged from equatorial to subarctic regions, and they included water types from oligotrophic to eutrophic and altitudes from 0 m to 4700 m. The mean CDOM absorption coefficients at 440 nm [ a CDOM ( 440 ) ] and 320 nm [ a CDOM ( 320 ) ] varied in the ranges 0.063–0.35 m − 1 and 0.34–2.28 m − 1 , respectively, with highest values in LV, Uganda and the lowest in the high-altitude LN, Tibet. The mean spectral slopes S 280 − 500 and S 350 − 500 were found to vary in the ranges of 0.017–0.032 nm − 1 and 0.013–0.015 nm − 1 , respectively. The highest mean value for S 280 − 500 as well as the lowest mean value for S 350 − 500 were found in LN. Scatter plots of S 280 − 500 versus a CDOM ( 440 ) and a CDOM ( 320 ) values ranges revealed a close connection between RCW, LF, and SF on one side, and BS and LV on the other side. CDOM seems to originate from terrestrial sources in LF, SF, BS, and LV, while RCW is characterized by autochthonous-oceanic CDOM, and LN by autochthonous CDOM. Photobleaching of CDOM is prominent in LN, demonstrated by absorption towards lower wavelengths in the UV spectrum. We conclude that high altitudes, implying high levels of UV radiation and oligotrophic water conditions are most important for making a significant change in CDOM absorption properties.

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CDOM Absorption Properties of Natural Water Bodies Along Extreme Environmental Gradients

10.5194/egusphere-egu2020-10101 ◽

2020 ◽

Author(s):

Jakob J. Stamnes ◽

Ciren Nima ◽

Børge Hamre ◽

Øyvind Frette ◽

Yi-Chun Chen ◽

...

Keyword(s):

Environmental Gradients ◽

Lake Victoria ◽

Eutrophic Lake ◽

Mean Value ◽

Water Bodies ◽

Spectral Slope ◽

Uv Spectrum ◽

Absorption Properties ◽

Oligotrophic Water ◽

The Mean

We present absorption properties of colored dissolved organic matter (CDOM) sampled in six different water bodies along extreme altitudinal, latitudinal, and trophic state gradients. Three sites are in Norway: the mesotrophic Lysefjord (LF), Samnangerfjord (SF), and R&#248;st Coastal Water (RCW); two sites are in China: the oligotrophic Lake Namtso (LN) and the eutrophic Bohai Sea (BS); and one site is in Uganda: the eutrophic Lake Victoria (LV).&#160;The site locations ranged from equatorial to subarctic regions, and they included water types from oligotrophic to eutrophic and altitudes from 0 m to 4700 m. The mean CDOM absorption coefficients at 440 nm [aCDOM(440)] and 320 nm [aCDOM(320)] varied in the ranges 0.063&#8211;0.35 m-1 and 0.34&#8211;2.28 m-1, respectively, with highest values in LV, Uganda and the lowest in the high-altitude LN, Tibet.&#160;The mean spectral slopes S280-500 and S350-500 were found to vary in the ranges of 0.017&#8211;0.032 nm-1 and 0.013&#8211;0.015 nm-1, respectively. The highest mean value for S280-500 as well as the lowest mean value for S350-500 were found in LN. Scatter plots of S280-500 versus aCDOM(440) and aCDOM(320) values ranges revealed a close connection between RCW, LF, and SF on one side, and BS and LV on the other side.&#160;CDOM seems to originate from terrestrial sources in LF, SF, BS, and LV, while RCW is characterized by autochthonous-oceanic CDOM, and LN by autochthonous CDOM. Photobleaching of CDOM is prominent in LN, demonstrated by absorption towards lower wavelengths in the UV spectrum. We conclude that high altitudes, implying high levels of UV radiation and oligotrophic water conditions are most important for making a significant change in CDOM absorption properties.Considering all study sites, we find a strong negative linear relationship between the base-10 logarithm of aCDOM(440) and the spectral slope S280-500, and also between the base-10 logarithm of aCDOM(320) and the spectral slope S280-500.

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SEASONAL COMPARISON OF ERA-INTERIM PRECIPITATION DATASET FOR ENTIRE INDIAN REGION

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences ◽

10.5194/isprs-archives-xlii-5-567-2018 ◽

2018 ◽

Vol XLII-5 ◽

pp. 567-573 ◽

Cited By ~ 1

Author(s):

V. Sharma ◽

K. Pandey ◽

P. K. Thakur ◽

S. P. Aggarwal ◽

B. R. Nikam ◽

...

Keyword(s):

Correlation Coefficient ◽

Mean Value ◽

Rainfall Data ◽

Study Region ◽

Entire Study ◽

Reference Images ◽

Scatter Plots ◽

Seasonal Basis ◽

The Mean ◽

June July

Abstract. Era-Interim (ECMWF Re- analysis) is a global reanalysis atmospheric product which is being continuously updated in real time since 1979. It is also termed as third generation reanalysis product. The Era–Interim gives meteorological products like precipitation, temperature, etc. In the present work, 3-hourly Era–Interim product for the entire India is compared with gridded data provided by IMD for period 1979&ndash;2013 and APHRODITE data for period 1979&ndash;2007, respectively. The comparison is done on seasonal basis and the seasons are taken based on the pattern of rainfall, hence, the four seasons selected are DJF (December, January & February), MAM (March, April & May), JJAS (June, July, August & September) and ON (October & November). In the methodology the Era-Interim 3-hourly products are converted into the daily products and then it is used to form seasonal images for each year. All the images are then taken to form four images as outcome for the entire study period which represents the average rainfall (mm/day) for the entire region. This is being done for the IMD and for the APHRODITE Data. All the four images are then taken for the comparison with the reference images of the IMD 0.5º&times;0.5º gridded rainfall data and with the APHRODITE 0.5º&times;0.5º gridded rainfall data. The correlation coefficient and the RMSE for each season is calculated. The mean value is compared with the mean of IMD and APHRODITE rainfall products, respectively and a bias in mean is also calculated along with the scatter plots of Era-Interim with the reference datasets. The Era &ndash; Interim data came out with suitable comparative parameters with high correlation coefficient and low RMSE value in certain regions and in specific seasons. Scatter plots have also given good correlation in all the seasons. Bias maps have also shown very less bias in specific seasons for certain regions. The suitability maps prepared for the study region also shows that most of the region lies in most suitable range and very less in unsuitable range.

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Predicting relationships between solar jet variables

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/stz2402 ◽

2019 ◽

Author(s):

Leonard A Freeman

Keyword(s):

Shock Wave ◽

Initial Velocity ◽

Linear Equations ◽

Correlation Coefficients ◽

Mean Value ◽

Square Root ◽

Simple Physical Interpretation ◽

Scatter Plots ◽

The Mean ◽

The Relationship

Abstract Studies of spicules and similar solar jets reveal a strong correlation between some of the kinematic variables, particularly between the initial velocity V, and the subsequent deceleration, a. It has been proposed that there is a linear relationship between these two variables and that this offers proof for a shock wave mechanism acting on the spicules, although the linear equations found are all different. It is shown here that the relationship is better described by a non-linear form: V is proportional to the square root of a. This relationship between V and a also provides a simple physical interpretation for the results. The different linear equations are found to be simply tangents to this (a, V) curve. Another method used to investigate the (a, V) connection is to determine the correlation coefficients between the kinematic variables from their scatter plots. It is also shown how these correlations also can be predicted from the mean value of the acceleration and height and their standard deviations for the sample under consideration. The implications of these results and the possibility that spicule behaviour is partly due to magnetic fields are discussed.

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Uncertainty of chemical status in surface waters

Scientific Reports ◽

10.1038/s41598-021-93051-9 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Małgorzata Loga ◽

Karol Przeździecki

Keyword(s):

Standard Deviation ◽

Mean Value ◽

Water Bodies ◽

Limit Of Quantification ◽

Chemical Status ◽

Chemical Indicators ◽

Rivers And Lakes ◽

Status Assessment ◽

The Mean ◽

Proposed Modification

AbstractThis article addresses the issue of estimating Pom—the probability of misclassifying the chemical status confidence of a water body status assessment. The main concerns of the authors were chemical quality elements with concentrations in water bodies which are close to or even smaller than the limit of quantification (LOQ). Their values must be set to half of this limit to calculate the mean value. This procedure leads to very low standard deviation values and unrealistic values of Pom for chemical indicators. In turn, this may lead to the false conclusion that not only is the chemical status good but also that this status assessment is perfect. Therefore, for a more reliable calculation of Pom, the authors suggested a modified calculation in which the value of half the LOQ for calculating the mean value was kept, but zero as the concentration value for the standard deviation calculation was adopted. The proposed modification has been applied to the Hierarchical Approach procedure for Pom estimation of the chemical status of Polish rivers and lakes. The crucial finding is that current chemical status assessments may be incorrect in the case of approximately 25% of river water bodies and 30% of lake water bodies categorised as good, and 20% of both types of water bodies classified as below good.

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Long-period modulated superstructures in Pd-12.5 at.%Ce and Pd-15 at.%Ce alloys

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100173959 ◽

1990 ◽

Vol 48 (4) ◽

pp. 164-165

Author(s):

Noriyuki Kuwano ◽

Masaru Itakura ◽

Kensuke Oki

Keyword(s):

Electron Microscopy ◽

Mean Value ◽

Heavy Elements ◽

Arc Furnace ◽

X Ray ◽

Long Period ◽

Ultra High Purity ◽

Heat Treated ◽

Atomic Scattering ◽

The Mean

Pd-Ce alloys exhibit various anomalies in physical properties due to mixed valences of Ce, and the anomalies are thought to be strongly related with the crystal structures. Since Pd and Ce are both heavy elements, relative magnitudes of (fcc-fpd) are so small compared with <f> that superlattice reflections, even if any, sometimes cannot be detected in conventional x-ray powder patterns, where fee and fpd are atomic scattering factors of Ce and Pd, and <f> the mean value in the crystal. However, superlattices in Pd-Ce alloys can be analyzed by electron microscopy, thanks to the high detectability of electron diffraction. In this work, we investigated modulated superstructures in alloys with 12.5 and 15.0 at.%Ce.Ingots of Pd-Ce alloys were prepared in an arc furnace under atmosphere of ultra high purity argon. The disc specimens cut out from the ingots were heat-treated in vacuum and electrothinned to electron transparency by a jet method.

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Partition Coefficient Ratios and Tumour Perfusion Studied with 85mKr and 133Xe

Nuklearmedizin ◽

10.1055/s-0038-1628899 ◽

1987 ◽

Vol 26 (06) ◽

pp. 253-257

Author(s):

M. Mäntylä ◽

J. Perkkiö ◽

J. Heikkonen

Keyword(s):

Partition Coefficient ◽

Partition Coefficients ◽

Regional Blood Flow ◽

Blood Perfusion ◽

Compartmental Analysis ◽

Malignant Tumour ◽

Mean Value ◽

Perfusion Rate ◽

Biological Variables ◽

The Mean

The relative partition coefficients of krypton and xenon, and the regional blood flow in 27 superficial malignant tumour nodules in 22 patients with diagnosed tumours were measured using the 85mKr- and 133Xe-clearance method. In order to minimize the effect of biological variables on the measurements the radionuclides were injected simultaneously into the tumour. The distribution of the radiotracers was assumed to be in equilibrium at the beginning of the experiment. The blood perfusion was calculated by fitting a two-exponential function to the measuring points. The mean value of the perfusion rate calculated from the xenon results was 13 ± 10 ml/(100 g-min) [range 3 to 38 ml/(100 g-min)] and from the krypton results 19 ± 11 ml/(100 g-min) [range 5 to 45 ml/(100 g-min)]. These values were obtained, if the partition coefficients are equal to one. The equations obtained by using compartmental analysis were used for the calculation of the relative partition coefficient of krypton and xenon. The partition coefficient of krypton was found to be slightly smaller than that of xenon, which may be due to its smaller molecular weight.

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Detection of Soluble Fibrin Monomer Complexes in Blood by Means of Protamine Sulphate Test

Thrombosis and Haemostasis ◽

10.1055/s-0038-1651247 ◽

1968 ◽

Vol 20 (01/02) ◽

pp. 044-049 ◽

Cited By ~ 33

Author(s):

B Lipiński ◽

K Worowski

Keyword(s):

Human Subjects ◽

Coronary Thrombosis ◽

Mean Value ◽

Healthy Human ◽

Protamine Sulphate ◽

Soluble Fibrin ◽

Fibrin Monomer ◽

Dog Plasma ◽

The Mean ◽

Precipitable Protein

SummaryIn the present paper described is a simple test for detecting soluble fibrin monomer complexes (SFMC) in blood. The test consists in mixing 1% protamine sulphate with diluted oxalated plasma or serum and reading the optical density at 6190 Å. In experiments with dog plasma, enriched with soluble fibrin complexes, it was shown that OD read in PS test is proportional to the amount of fibrin recovered from the precipitate. It was found that SFMC level in plasma increases in rabbits infused intravenously with thrombin and decreases after injection of plasmin with streptokinase. In both cases PS precipitable protein in serum is elevated indicating enhanced fibrinolysis. In healthy human subjects the mean value of OD readings in plasma and sera were found to be 0.30 and 0.11, while in patients with coronary thrombosis they are 0.64 and 0.05 respectively. The origin of SFMC in circulation under physiological and pathological conditions is discussed.

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Detection of Circulating Tissue Factor and Factor VII in a Normal Population

Thrombosis and Haemostasis ◽

10.1055/s-0038-1650365 ◽

1996 ◽

Vol 75 (05) ◽

pp. 772-777 ◽

Cited By ~ 30

Author(s):

Sybille Albrecht ◽

Matthias Kotzsch ◽

Gabriele Siegert ◽

Thomas Luther ◽

Heinz Großmann ◽

...

Keyword(s):

Tissue Factor ◽

Normal Population ◽

Mean Value ◽

Factor Vii ◽

Significant Difference ◽

Age Dependent ◽

The Mean ◽

Highly Correlated ◽

And Gender

SummaryThe plasma tissue factor (TF) concentration was correlated to factor VII concentration (FVIIag) and factor VII activity (FVIIc) in 498 healthy volunteers ranging in age from 17 to 64 years. Immunoassays using monoclonal antibodies (mAbs) were developed for the determination of TF and FVIIag in plasma. The mAbs and the test systems were characterized. The mean value of the TF concentration was 172 ± 135 pg/ml. TF showed no age- and gender-related differences. For the total population, FVIIc, determined by a clotting test, was 110 ± 15% and the factor VIlag was 0.77 ± 0.19 μg/ml. FVII activity was significantly increased with age, whereas the concentration demonstrated no correlation to age in this population. FVII concentration is highly correlated with the activity as measured by clotting assay using rabbit thromboplastin. The ratio between FVIIc and FVIIag was not age-dependent, but demonstrated a significant difference between men and women. Between TF and FVII we could not detect a correlation.

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Determination of Plasminogen in Clots and Thrombi

Thrombosis and Haemostasis ◽

10.1055/s-0038-1655625 ◽

1966 ◽

Vol 16 (01/02) ◽

pp. 038-050 ◽

Cited By ~ 6

Author(s):

Ulla Hedner ◽

Inga Marie Nilsson ◽

B Robertson

Keyword(s):

Mean Value ◽

Main Mechanism ◽

Clot Lysis ◽

Post Mortem ◽

Digestion Time ◽

Normal Volunteers ◽

Casein Solution ◽

The Mean

SummaryThe plasminogen content was determined by a casein method in plasma and serum from 20 normal volunteers. The mean plasminogen content was found to be 10.1 ACU (the arbitrary caseinolytic unit defined in such a way that using a 3% casein solution and a digestion time of 20 min. at 37°C, 10 ACU gave an extinction of 0.300). No difference between serum and plasma regarding the plasminogen content was found.Plasminogen was determined in drained and drained plus washed clots prepared from 2 ml plasma. The highest values found in the drained clots were 0.9 ACU/clot and 0.2 ACU/clot in the drained plus washed clots.Plasminogen was also determined in drained and drained plus washed clots prepared from plasma with added purified plasminogen. The plasminogen was recovered in the washing fluid. According to these tests, then, purified added plasminogen is washed out of the clots.The plasminogen content of 20 thrombi obtained post mortem was also determined. The mean value was found to be 0.7 ACU/cm thrombus. Judging from our results, the “intrinsic clot lysis theory” is not the main mechanism of clot dissolution.

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Perbedaan Pengetahuan Siswa Tentang Penyakit Hepatitis A Sebelum Dan Sesudah Penyuluhan Di MTsN 02 Bondowoso Tahun 2015

Jurnal Ilmu Kesehatan ◽

10.32831/jik.v4i2.85 ◽

2017 ◽

Vol 4 (2) ◽

pp. 14

Author(s):

Putri Megasari

Keyword(s):

Hepatitis A ◽

Hepatitis Virus ◽

Sampling Technique ◽

Mean Value ◽

Test Design ◽

The World ◽

Before And After ◽

Post Test ◽

The Mean ◽

Paired T Test

Hepatitis has become a health problem in the world. The hepatitis virus infected many people. According to the teacher of MTsN 02 Bondowoso more than 20 students have hepatitis A viral infection. The purpose of this research was to know the differences of students' knowledge about hepatitis A before and after counseling in MTsN 02 Bondowoso 2015. This study used pre-experimental (pre-post test design). This study used stratified random sampling technique, 127 students from 270 sample involved this research,and 143 students was excluded. We used questionnaires to collect data. The results showed that the mean value of the students 'knowledge about hepatitis A before counseling in MTsN 02 Bondowoso 2015 was 83.96 with the lowest value of 37.5 and the highest value was 100. The mean value of the students' knowledge about hepatitis A after counseling in MTsN 02 Bondowoso 2015 was 93.21 with the lowest value waf 62.5 and the highest value was 100. Paired t test showed that t (-9.07) > t table (1.98), the null hypothesis (H0) was rejected. There was a difference between students' knowledge about hepatitis A before and after counseling in MTsN 02 Bondowoso 2015. This study showed that routine counseling by healthcare provider was important to prevent hepatitis A infection.; Keywords: counseling, knowledge of students, hepatitis

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