Abundance of Boeckella gracilis (Daday, 1902) (Copepoda, Calanoida) in seasonal coastal pools in the Araucania region (38°S, Chile)

Crustaceana ◽  
2018 ◽  
Vol 91 (10) ◽  
pp. 1211-1217
Author(s):  
Patricio De los Ríos
Keyword(s):  
Correlation Analysis ◽  
Environmental Stress ◽  
Relative Abundance ◽  
Calanoid Copepod ◽  
Inverse Correlation ◽  
Inland Waters ◽  
Absolute Abundance ◽  
Significant Inverse Correlation

Abstract The presence of the calanoid copepod Boeckella gracilis (Daday, 1902) in Chilean seasonal pools has been only poorly studied as yet. The aim of the present study thus is to investigate the role of conductivity and temperature on the relative and absolute abundance of B. gracilis in seasonal coastal pools in the Araucania region (38°S, Chile). The results of correlation analysis revealed the presence of a significant inverse correlation between conductivity and relative abundance, whereas no significant correlations were found between conductivity and absolute abundance, between temperature and absolute abundance, and between temperature and relative abundance. These results agree partially with similar observations for mountain pools in the same region, but they would not agree with observations for calanoids of saline and subsaline inland waters in the northern and southern extremes of Chile. Considering this scenario, the species would show different populational responses to environmental stress in different situations, which phenomenon deserves to be studied more extensively and in more detail.

scholarly journals Play Experience as Individual Ability and a Factorof Individual Resistance to Psychosomatic Disorders

2017 ◽  
Vol 13 (4) ◽  
pp. 118-126
Author(s):  
A.V. Serikov
Keyword(s):  
Statistical Analysis ◽  
Cultural Diversity ◽  
Inverse Correlation ◽  
Psychosomatic Disorders ◽  
Individual Resistance ◽  
Significant Inverse Correlation ◽  
Individual Ability ◽  
The Individual ◽  
Play Experience

The paper analyzes the constructs of ‘play experience’ and ‘play experiencing ability’ from the perspective of cultural-historical psychology. The paper stresses the importance of education, play, art, wealth and cultural diversity in the formation of healthy and independent personality. The role of play experience as a healthful factor that allows an individual to acquire resistance to psychosomatic disorders is supported both theoretically and empirically. It is argued that the individual capable of play experience can transform the meaning of a situation (within his/her play experience) and therefore eliminate its psychotraumatic effect which contributes to the development of psychosomatic disorders. The paper provides outcomes of an empirical research with 73 participants (40 female, 33 male; aged 18—45, with the average age of 25 years). The statistical analysis revealed a significant inverse correlation between the level of the individual’s play experiencing ability and the level of his/her somatization (rs = -0,435; p ≤ 0,01), which confirms the research hypothesis.

Crustacean zooplankton assemblages in Algerian saline lakes: a comparison with their Chilean Altiplano counterparts

Crustaceana ◽  
2016 ◽  
Vol 89 (13) ◽  
pp. 1485-1500
Author(s):  
Patricio De los Ríos-Escalante ◽  
Mounia Amarouayache
Keyword(s):  
Saline Lakes ◽  
Arid Regions ◽  
Calanoid Copepod ◽  
Null Model ◽  
Inverse Correlation ◽  
Crustacean Zooplankton ◽  
Species Number ◽  
Significant Inverse Correlation ◽  
The World ◽  
Chilean Altiplano

Crustacean communities in saline lakes are regulated mainly by salinity, and a significant inverse correlation can be found between salinity and species richness. The aim of the present study is to compare the carcinological diversity of two distinct arid regions of the world: Algerian saline lakes, locally called “chotts” and “sebkhas”, and their Chilean Altiplano counterparts, and to determine if there are similar regulator patterns that influence the composition of those communities. The main halophilic taxon common to both regions was the anostracan Artemia at high salinities. However, many other halotolerant crustaceans may occur in Algerian chotts and sebkhas, such as Phallocryptus spinosa, Branchinectella media, Moina salina, Cletocamptus retrogressus, Arctodiaptomus salinus and Heterocypris sp. In Chilean saline lakes the calanoid copepod Boeckella poopoensis was an important component of zooplankton at high salinities, while ostracods were totally absent. The results of correlation analysis revealed a significant inverse correlation between salinity and species number (Algeria, , , p-value = 0.0032; Chile, , ; p-value < 0.0165). The results of null model analysis describing species co-occurrence showed that the species communities are random for Algerian saline lakes due to the presence of many halotolerant species. For Chilean saline lakes, the species communities are structured.

scholarly journals The Role of AChE in Swimming Behavior of Daphnia magna: Correlation Analysis of Both Parameters Affected by Deltamethrin and Methomyl Exposure

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Qing Ren ◽  
Ruibin Zhao ◽  
Cheng Wang ◽  
Shangge Li ◽  
Tingting Zhang ◽  
...  
Keyword(s):  
Correlation Analysis ◽  
Environmental Stress ◽  
Daphnia Magna ◽  
Ache Activity ◽  
De Novo ◽  
Behavior Disorder ◽  
Swimming Behavior ◽  
Positive Effects ◽  
In The Beginning

The unpredictable toxicity of insecticides may cause behavior disorder of biological organisms. In order to assess the role of acetylcholinesterase (AChE) in swimming behavior of Daphnia magna, a correlation analysis of both parameters in 24 h exposure of deltamethrin (DM) and methomyl (MT) was investigated. The behavior responses of D. magna in DM (13.36 μg/L and 33.40 μg/L) and MT (19.66 μg/L and 49.15 μg/L) suggested that recovery behavior in the adjustment phase was crucial, and behavior homeostasis provided them with an optimal way to achieve a wider tolerance against environmental stress. During the experiment, positive effects on AChE activity occurred in the beginning of the exposure. Even though the de novo synthesis of AChE in D. magna might help it recover, the AChE inhibition in different treatments could be observed. Some induction effects on AChE activity at the beginning of exposure occurred, and a 50% decrease may cause toxic effects on behavior. In most treatments, the results showed that both behavior strength and AChE activity stayed in the same field within a correlation circle. These results illustrated that the environmental stress caused by both DM and MT could inhibit AChE activity and subsequently induce a stepwise behavior response, though both pesticides affect it as direct and indirect inhibitors, respectively.

scholarly journals Role of diffusion weighted MRI in characterization of renal diseases

2018 ◽  
Vol 5 (6) ◽  
pp. 1485
Author(s):  
Pankaj Kumar ◽  
Yashpaul . ◽  
P. K. Soni ◽  
Dhiraj Kapoor ◽  
Rajesh Kumar ◽  
...  
Keyword(s):  
Renal Failure ◽  
Renal Function ◽  
Inverse Correlation ◽  
Renal Diseases ◽  
Significant Inverse Correlation ◽  
Adc Value ◽  
Adc Values ◽  
The Mean

Background: MRI has the unique ability to show both structure and function objectively without any radiation exposure to the patient. Apparent diffusion coefficient (ADC) is a quantitative parameter that combines the effects of capillary perfusion and water diffusion. Renal parameters have shown inverse relationship with the ADC values in these studies. So, ADC values have a potential to serve as a marker of renal function. The aim of the present endeavor was to study the role of DW MRI in characterization of renal function and to find out the clinical use of DW MRI in renal diseases; and establish the relationship between renal function assessed by eGFR and that by DW MRI calculated in terms of ADC values in various renal diseasesMethods: Total 30 patients were included in the study. The study was carried out in department of radiodiagnosis at Dr. RPMGC Kangra. 1.5 Tesla MRI machine was used. The ADC value was calculated at upper, mid and lower pole of each kidney and the mean was taken. Then the mean of right and left kidneys was taken to calculate the mean ADC of the patient.Results: Serum creatinine in present study ranged from 0.67 to 13.9mg/dl, with mean value of 7.28mg/d. Serum urea ranged from 22 to 293mg/dl with the mean of 119.6mg/dl. There was significant inverse correlation occurred between ADC values and serum urea (r=-0.43, p=0.02). There was significant inverse correlation between ADC values and serum creatinine (p=0.01) and a positive correlation between eGFR and ADC values (r=0.14, p=0.47).Conclusions: ADC values consistently decreased with increasing stage of renal failure, so these can be used as an indirect maker of renal function. Authors conclude that lower would be the ADC value more advanced would be the stage of renal failure. DW MRI can also be detect early stages of renal failure even when the serum maker are within normal range.

Na intake, renal renin, and the severity of myohemoglobinuric renal failure in rats

1981 ◽  
Vol 241 (1) ◽  
pp. F34-F38
Author(s):  
A. K. Bidani ◽  
P. C. Churchill
Keyword(s):  
Renal Failure ◽  
Acute Renal Failure ◽  
Protective Effect ◽  
Causal Relationship ◽  
Blood Urea Nitrogen ◽  
Tap Water ◽  
Inverse Correlation ◽  
Significant Inverse Correlation ◽  
Glycerol Injection

We have examined the role of dietary Na and renal cortical renin concentration (RCRC) on the severity of glycerol-induced acute renal failure (ARF) in the rat. Na loading (1% NaCl to drink) and Na deprivation (Na-free diet) of 5-6 wk duration decreased and increased RCRC, respectively, with respect to control. As assessed by blood urea nitrogen measured 48 h after glycerol injection, the severity of ARF was inversely related to RCRC. However, this was not a causal relationship. Either 6- or 48-h access to 1% NaCl did not lower RCRC of previously Na-deprived rats, but did decrease the severity of ARF. Conversely, 6- or 48-h access to tap water did not increase RCRC of previously Na-loaded rats, but did increase severity of ARF. A significant inverse correlation was found between severity of ARF and Na excretion prior to glycerol injection, a finding consistent with the hypothesis that solute diuresis has a protective effect.

scholarly journals Cerebrospinal Fluid Levels of α-tocopherol and Neopterin In Patients with Dementia

Pteridines ◽  
1999 ◽  
Vol 10 (4) ◽  
pp. 220-224 ◽  
Author(s):  
Wolfgang Sattler ◽  
Friedrich Leblhuber ◽  
Johannes Walli ◽  
Bernhard Widner ◽  
Dietmar Fuchs
Keyword(s):  
Oxidative Stress ◽  
Cerebrospinal Fluid ◽  
Vitamin E ◽  
Inverse Correlation ◽  
Interferon Γ ◽  
Significant Inverse Correlation ◽  
Monocytic Cells ◽  
Fluid Levels ◽  
Lipid Soluble Antioxidant

Summary In patients with different forms of dementia we compared serum and cerebrospinal fluid concentrations of α-tocopherol (vitamin-E), the major circulating lipid-soluble antioxidant, and neopterin, a product released from monocytic cells upon stimulation with interferon-γ. A significant inverse correlation was found between the concentrations of both compounds in the cerebrospinal fluid. The data point to a role of oxidative stress to reduce antioxidant levels in elderly demented patients with neurodegenerative diseases.

High Levels of Plasma Protein C in Nephrotic Syndrome

1985 ◽  
Vol 53 (01) ◽  
pp. 005-007 ◽  
Author(s):  
I Pabinger-Fasching ◽  
K Lechner ◽  
H Niessner ◽  
P Schmidt ◽  
E Balzar ◽  
...  
Keyword(s):  
Nephrotic Syndrome ◽  
Plasma Protein ◽  
Protein C ◽  
Inverse Correlation ◽  
Elevated Plasma ◽  
Significant Inverse Correlation ◽  
At Iii ◽  
Thrombotic Tendency ◽  
Protein C Activity

SummaryIn patients with severe nephrotic syndrome determinations of plasma protein C : Ag levels (8 patients: 5 adults, 3 children) and protein C activity (3 out of 8 patients) revealed significantly elevated plasma protein C concentrations. Furthermore we observed a significant inverse correlation of protein C : Ag to AT III : Ag levels. No protein C : Ag could be detected in the urine of two patients studied. We conclude from our data, that changes of plasma protein C do not contribute to the high thrombotic tendency in nephrotic syndrome.

scholarly journals The Dependence of Renal 68Ga[Ga]-DOTATOC Uptake on Kidney Function and Its Relevance for Peptide Receptor Radionuclide Therapy with 177Lu[Lu]-DOTATOC

Diagnostics ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1216
Author(s):  
Falk Gühne ◽  
Alexander Heinzig ◽  
Philipp Seifert ◽  
Robert Drescher ◽  
Martin Freesmeyer
Keyword(s):  
Kidney Function ◽  
Specific Binding ◽  
Correlation Coefficients ◽  
Inverse Correlation ◽  
Peptide Receptor Radionuclide Therapy ◽  
Tracer Uptake ◽  
Significant Inverse Correlation ◽  
Peptide Receptor ◽  
Pet Ct ◽  
Induced Changes

Background: In addition to its SSTR-specific binding in tumors and healthy tissues, DOTATOC analogues accumulate in kidney parenchyma. Renal tracer uptake might be a surrogate of kidney function or dysfunction. This study aimed to evaluate if kidney function can be estimated from 68Ga[Ga]-DOTATOC uptake in PET/CT and its impact on the nephrotoxicity of 177Lu[Lu]-DOTATOC PRRT. Methods: Two cohorts of patients (A: 128 diagnostic patients; B: 32 PRRT patients) were evaluated retrospectively. SUV values of the kidneys, physiologically SSTR-expressing organs and in background compartments were assessed. Kidney function was calculated as eGFR by CKD-EPI creatinine equation. Pearson’s correlation coefficients and treatment-induced changes of uptake and kidney function were assessed and compared. Results: Kidney function and renal DOTATOC uptake showed a significant inverse correlation (R2 = 0.037; p = 0.029). Evaluated models of PET/CT measurements were not able to predict kidney function sufficiently. The uptake of other organs did not depend on eGFR. While the renal uptake increased after PRRT (p < 0.001), the kidney function did not change significantly (p = 0.382). Neither low pre-therapeutic eGFR nor high pre-therapeutic kidney uptake were risk factors of PRRT-induced deterioration in kidney function. Conclusion: The relevance of kidney function for renal 68Ga[Ga]-DOTATOC uptake is limited. The nephrotoxicity of 177Lu[Lu]-DOTATOC PRRT might be low and cannot be reliably predicted by pre-therapeutic measurements.

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