UV Absorbance By Thallus Extracts of Umbilicate Lichens

1993 ◽  
Vol 25 (4) ◽  
pp. 415-422 ◽  
Author(s):  
Dianne Fahselt
Keyword(s):  
Negative Correlation ◽  
Dry Weight ◽  
Significant Negative Correlation ◽  
Enzyme Polymorphism ◽  
Uv Absorbance ◽  
Banding Patterns

AbstractEleven stands of umbilicate lichens exhibiting a range of variabilities in enzyme banding patterns were compared on the basis of the ultraviolet (UV)absorbing properties of thallus extracts. Stands of Umbilicaria veilea, which were some of the most variable enzymatically, had the lowest UV absorbancy in extracts, and stands of Lasallia papulosa, which were among the least variable enzymatically, showed more UV absorbance than others. Umbilicaria deusta, U. muhlenbergii and U. mammulata had intermediate levels of absorbance. Negative correlations (P = 005–007) were found between enzyme polymorphism and UV absorbance in the ranges 215–220, 269–271 and 304–305 nm. There was also a significant negative correlation at P = 003 between enzyme variability and thallus dry weight extractable with either ethanol or acetone.

scholarly journals Gerris spinolaeLethierry and Severin (Hemiptera: Gerridae) andBrachydeutera longipesHendel (Diptera: Ephydridae): Two Effective Insect Bioindicators to Monitor Pollution in Some Tropical Freshwater Ponds under Anthropogenic Stress

2012 ◽  
Vol 2012 ◽  
pp. 1-10
Author(s):  
Arijit Pal ◽  
Devashish Chandra Sinha ◽  
Neelkamal Rastogi
Keyword(s):  
Dissolved Oxygen ◽  
Negative Correlation ◽  
Dry Weight ◽  
Significant Negative Correlation ◽  
Positive Correlation ◽  
Freshwater Ponds ◽  
Abundance Patterns ◽  
Water Quality Variable ◽  
Free Carbon Dioxide ◽  
Tropical Freshwater

The abundance patterns of two insects,Gerris spinolaeandBrachydeutera longipes, were found to be affected by abiotic aquatic factors including free carbon dioxide, dissolved oxygen, BOD, and phosphate concentrations prevailing in four tropical freshwater ponds, three of which being anthropogenically stressed. Regression analysis between each individual-independent water quality variable and insect abundance demonstrated a significant positive correlation in each case betweenB. longipesabundance and BOD, phosphate, free CO2, and algae dry weight, while a significant negative correlation of each of these variables was found withGerris spinolaeabundance. Moreover, a significant negative correlation ofB. longipesabundance was calculated with dissolved oxygen concentration, whileG. spinolaeabundance exhibited a positive correlation with the same. Thus,G. spinolaeappears to be a pollution sensitive, effective bioindicator for healthy unpolluted ponds, whileB. longipeshas potential as a pollution-resistant insect species indicative of pollution occurrence.

scholarly journals Floristic composition of weeds, morphological and productive characteristics of different wheat genotypes of alternative small grains in organic production

2017 ◽  
Vol 62 (3) ◽  
pp. 229-240 ◽  
Author(s):  
Svetlana Roljevic-Nikolic ◽  
Dusan Kovacevic ◽  
Zeljko Dolijanovic
Keyword(s):  
Grain Yield ◽  
Negative Correlation ◽  
Production System ◽  
Floristic Composition ◽  
Dry Weight ◽  
Significant Negative Correlation ◽  
Organic Production ◽  
Stem Height ◽  
Wheat Genotypes ◽  
Small Grains

This study was aimed at assessing the floristic composition of weeds, studying properties of different wheat genotypes of alternative small grains (stem height, last internode length and spike length, thousand-grain weight, grain yield) and the relationship between the studied traits and dry weight of weeds in an organic production system. Testing was carried out in a randomized block design with four replications, in a two-year period (2009/2010?2010/2011). The study included one variety of durum wheat Triticum durum (Dolap, G1), the compact wheat Triticum compactum (Bambi, G2) and spelt Triticum spelt (Nirvana, G3). A treatment for maintaining the increase in the biological soil fertility included two different fertilisation variants: T1 ? fertilisation only with microbiological fertiliser as a top dressing (5.0 l ha-1); T2 ? biohumus fertilisation (3.0 t ha-1) and microbiological fertiliser as a top dressing (5.0 l ha-1); T0 ? control ? without the use of fertilisers. The results have shown that the genotype and treatment, as studied factors, very significantly affected the dry weight of weeds, stem height, last internode length and spike length, as well as the yield of different wheat genotypes of alternative small grains, while the effect of their interaction was lower. In terms of the lowinput system, a highly significant negative correlation (r=-0.58) was observed between the stem height and the dry weight of weeds. In addition, a significant negative correlation was noticed between the grain yield and the dry weight of weeds (r=-0.44). These results showed that proper selection of the genotypes with the application of fertilisers could have a significant effect on the weeds and could lead to establishing a stable production in the organic production system.

scholarly journals Selenium and mercury in the hair of raccoons (Procyon lotor) and European wildcats (Felis s. silvestris) from Germany and Luxembourg

Ecotoxicology ◽  
2019 ◽  
Vol 29 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Danuta Kosik-Bogacka ◽  
Natalia Osten-Sacken ◽  
Natalia Łanocha-Arendarczyk ◽  
Karolina Kot ◽  
Bogumiła Pilarczyk ◽  
...  
Keyword(s):  
Negative Correlation ◽  
Mercury Concentration ◽  
Total Mercury ◽  
Procyon Lotor ◽  
Dry Weight ◽  
Significant Negative Correlation ◽  
Molar Ratio ◽  
Total Mercury Concentration ◽  
Hair Samples

AbstractThis study examined the concentration of total mercury (THg) and selenium (Se), as well as the molar ratio of Se:THg in hair samples of terrestrial animals. THg and Se concentrations were measured from the hair of raccoons (Procyon lotor) and European wildcats (Felis s. silvestris) from Germany and Luxembourg. Median THg concentrations in hair from raccoons and wildcats were 0.369 and 0.273 mg kg−1 dry weight (dw), respectively. Se concentrations were higher in the hair of raccoons than of wildcats (0.851 and 0.641 mg kg−1 dw, respectively). Total mercury concentration in hair of raccoons from Luxembourg was almost 5× higher that found in hair of raccoons from Germany; however, Se concentration was similar. Thus, molar ratio of Se:THg was ~4× higher in the hair of raccoons from Germany than those from Luxembourg. Significant negative correlation was found between THg concentration and Se:THg molar ratio in both wildcats and raccoons.

Phenolic levels in Umbilicaria Americana in Relation to Enzyme Polymorphism, Altitude and Sampling Date

1996 ◽  
Vol 28 (4) ◽  
pp. 331-339 ◽  
Author(s):  
Andrew Swanson ◽  
Dianne Fahselt ◽  
Dale Smith
Keyword(s):  
Phenolic Compounds ◽  
Negative Correlation ◽  
North American ◽  
Phenolic Content ◽  
Sampling Period ◽  
Significant Negative Correlation ◽  
Enzyme Polymorphism ◽  
Uv Irradiance

AbstractA significant negative correlation was found between the quantity of acetone-extractable phenolic compounds and the degree of enzyme polymorphism in eight eastern North American populations of Umbilicaria americana. In sites higher elevations, where UV irradiance was more intense, phenolic levels were significantly lower and within-stand enzyme variability significantly greater than in low elevation sites. Similarly, the phenolic content of thalli collected in Ontario, Canada, over a 16-month sampling period was negatively correlated with mean monthly UV-B irradiance.

Thrombin generation in paediatric patients with congenital heart disease

2008 ◽  
Vol 28 (S 01) ◽  
pp. S61-S66 ◽  
Author(s):  
G. Cvirn ◽  
A. Rosenkranz ◽  
B. Leschnik ◽  
W. Raith ◽  
W. Muntean ◽  
...  
Keyword(s):  
Congenital Heart Disease ◽  
Heart Disease ◽  
Negative Correlation ◽  
Congenital Heart ◽  
Thrombin Generation ◽  
Significant Negative Correlation ◽  
Peak Height ◽  
Global Test ◽  
Paediatric Patients ◽  
Age Range

SummaryThrombin generation was studied in paediatric patients with congenital heart disease (CHD) undergoing cardiac surgery using the calibrated automated thrombography (CAT) in terms of the lag time until the onset of thrombin formation, time to thrombin peak maximum (TTP), endogenous thrombin potential (ETP), and thrombin peak height. The suitability to determine the coagulation status of these patients was investigated. Patients, material, methods: CAT data of 40 patients with CHD (age range from newborn to 18 years) were compared to data using standard coagulation parameters such as prothrombin (FII), antithrombin (AT), tissue factor pathway inhibitor (TFPI), prothrombin fragment 1.2 (F 1.2), thrombin-antithrombin (TAT), activated partial thromboplastin time (aPTT), and prothrombin time (PT). Results: A significant positive correlation was seen between ETP and FII (p < 0.01; r = 0.369), as well as between peak height and F II (p < 0.01; r = 0.483). A significant negative correlation was seen between ETP and TFPI values (p < 0.05; r = –0.225) while no significant correlation was seen between peak height and TFPI. A significant negative correlation was seen between F 1.2 generation and ETP (p < 0.05; r = –0.254) and between F 1.2 generation and peak height (p < 0.05; r = –0.236). No correlation was seen between AT and ETP or peak. Conclusions: CAT is a good global test reflecting procoagulatory and inhibitory factors of the haemostatic system in paediatric patients with CHD.

Negative Correlation Between Serum Levels of Homocysteine and Apolipoprotein M

2019 ◽  
Vol 19 (2) ◽  
pp. 120-126
Author(s):  
J. Wei ◽  
Y. Yu ◽  
Y. Feng ◽  
J. Zhang ◽  
Q. Jiang ◽  
...  
Keyword(s):  
Negative Correlation ◽  
Hepg2 Cells ◽  
Serum Levels ◽  
Significant Negative Correlation ◽  
Mrna Levels ◽  
Rt Pcr ◽  
Apolipoprotein M ◽  
Protein Mass ◽  
Protein Levels ◽  
Phosphoinositide 3 Kinase

Background: Homocysteine (Hcy) has been suggested as an independent risk factor for atherosclerosis. Apolipoprotein M (apoM) is a constituent of the HDL particles. The goal of this study was to examine the serum levels of homocysteine and apoM and to determine whether homocysteine influences apoM synthesis. Methods: Serum levels of apoM and Hcy in 17 hyperhomocysteinemia (HHcy) patients and 19 controls were measured and their correlations were analyzed. Different concentrations of homocysteine (Hcy) and LY294002, a specific phosphoinositide 3- kinase (PI3K) inhibitor, were used to treat HepG2 cells. The mRNA levels were determined by RT-PCR and the apoM protein mass was measured by western blot. Results: We found that decreased serum apoM levels corresponded with serum HDL levels in HHcy patients, while the serum apoM levels showed a statistically significant negative correlation with the serum Hcy levels. Moreover, apoM mRNA and protein levels were significantly decreased after the administration of Hcy in HepG2 cells, and this effect could be abolished by addition of LY294002. Conclusions: resent study demonstrates that Hcy downregulates the expression of apoM by mechanisms involving the PI3K signal pathway.

scholarly journals Daytime nap and nighttime breastfeeding are associated with toddlers’ nighttime sleep

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Machiko Nakagawa ◽  
Hidenobu Ohta ◽  
Rinshu Shimabukuro ◽  
Yoko Asaka ◽  
Takayo Nakazawa ◽  
...  
Keyword(s):  
Sleep Duration ◽  
Negative Correlation ◽  
Significant Negative Correlation ◽  
Sleep Diary ◽  
Daytime Nap ◽  
Nighttime Sleep

AbstractThe purpose of the present study is to examine the association between toddlers' sleep arrangements and their nighttime sleep duration and other sleep variables. For this investigation, we performed a study in which child activity and sleep levels were recorded using actigraphy. The parents of 1.5-year-old toddlers (n = 106) were asked to attach an actigraphy unit to their child’s waist with an adjustable elastic belt and complete a sleep diary for 7 consecutive days. Questionnaires were used to assess the sleep arrangements of the toddlers. There was a significant negative correlation between nap duration and nighttime sleep duration, suggesting that longer nap sleep induces shorter nighttime sleep duration. Among the sleep arrangements, such as nighttime breastfeeding or co-sleeping, only nighttime breastfeeding predicted shorter nighttime sleep duration. Our findings indicate that shorter naps induce a longer nighttime sleep in 1.5-year-old toddlers while nighttime breastfeeding decreases their nighttime sleep duration.

scholarly journals Correlates of SARS-CoV-2 Variants on Deaths, Case Incidence and Case Fatality Ratio among the Continents for the Period of 1 December 2020 to 15 March 2021

Genes ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 1061
Author(s):  
Wajdy J. Al-Awaida ◽  
Baker Jawabrah Al Hourani ◽  
Samer Swedan ◽  
Refat Nimer ◽  
Foad Alzoughool ◽  
...  
Keyword(s):  
Negative Correlation ◽  
Significant Positive Correlation ◽  
Vaccine Development ◽  
Case Fatality ◽  
Significant Negative Correlation ◽  
Reference Sequence ◽  
Genome Sequences ◽  
Positive Correlation ◽  
Case Fatality Ratio ◽  
Epidemiological Surveys

The outbreak of coronavirus disease 2019 (COVID-19), by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has quickly developed into a worldwide pandemic. Mutations in the SARS-CoV-2 genome may affect various aspects of the disease including fatality ratio. In this study, 553,518 SARS-CoV-2 genome sequences isolated from patients from continents for the period 1 December 2020 to 15 March 2021 were comprehensively analyzed and a total of 82 mutations were identified concerning the reference sequence. In addition, associations between the mutations and the case fatality ratio (CFR), cases per million and deaths per million, were examined. The mutations having the highest frequencies among different continents were Spike_D614G and NSP12_P323L. Among the identified mutations, NSP2_T153M, NSP14_I42V and Spike_L18F mutations showed a positive correlation to CFR. While the NSP13_Y541C, NSP3_T73I and NSP3_Q180H mutations demonstrated a negative correlation to CFR. The Spike_D614G and NSP12_P323L mutations showed a positive correlation to deaths per million. The NSP3_T1198K, NS8_L84S and NSP12_A97V mutations showed a significant negative correlation to deaths per million. The NSP12_P323L and Spike_D614G mutations showed a positive correlation to the number of cases per million. In contrast, NS8_L84S and NSP12_A97V mutations showed a negative correlation to the number of cases per million. In addition, among the identified clades, none showed a significant correlation to CFR. The G, GR, GV, S clades showed a significant positive correlation to deaths per million. The GR and S clades showed a positive correlation to number of cases per million. The clades having the highest frequencies among continents were G, followed by GH and GR. These findings should be taken into consideration during epidemiological surveys of the virus and vaccine development.

387 The moderating effect of emotion regulation strategies in the relationship between insomnia severity and bedtime procrastination

SLEEP ◽  
2021 ◽  
Vol 44 (Supplement_2) ◽  
pp. A153-A154
Author(s):  
Huisu Jeon ◽  
Sonhye Jeoung ◽  
Goeun Kim ◽  
Hyeyoung An ◽  
Hyojin Nam ◽  
...  
Keyword(s):  
Negative Correlation ◽  
Emotional Regulation ◽  
Significant Negative Correlation ◽  
Moderating Effect ◽  
Active Regulation ◽  
Support Seeking ◽  
Regulation Strategies ◽  
Bedtime Procrastination ◽  
The Relationship ◽  
Insomnia Severity

Abstract Introduction Bedtime Procrastination (BP) is defined as the behavior of going to bed later than intended, despite the absence of external factors. Bedtime procrastination is also prevalent among insomnia patients, and is associated with various sleep problems. Recent studies suggest emotional regulation as a mechanism of the procrastination behavior that is the conceptual foundation of bedtime procrastination. Emotional regulation difficulties are also associated with insomnia, but there is still a lack of research on the relationship between insomnia, emotional regulation strategies and bedtime procrastination. Thus, the study assumed that severity of insomnia would affect bedtime procrastination, and examined the moderating effect of the emotional regulation strategies in this relationship. Methods This study was conducted in 376 adults (mean age 23.73 ±2.14 years, 84.6% females). Participants were asked to answer Bedtime procrastination scale (BPS), an emotional regulation strategy checklist, and the Insomnia severity scale (ISI). Results As a result, a significant positive correlation was found between insomnia severity and bedtime procrastination (r=.286, p&lt;.01), and avoidant/distractive regulation style (r=.101, p&lt;.05). active regulation style (r=-.172, p&lt;.01) and support seeking regulation style (r=-.102, p&lt;.01) showed a significant negative correlation with the severity of insomnia. Bedtime procrastination behavior showed significant negative correlation only with active regulation style (r=-.151, p&lt;.01). Support seeking regulation style moderated the relationship between insomnia and bedtime procrastination behavior (B=.0165, 95%, CI=.0014, .0316). The interaction effect between insomnia and support seeking regulation style was also significant (∆R^2=.0112, p&lt;.05), indicating that the effect of insomnia on bedtime procrastination depends on the level of use of the support seeking regulation style. Conclusion These findings suggest that the level of support seeking regulation style is meaningful in terms of how insomnia affects bedtime procrastination. Support (if any) This work was supported by the Ministry of Education of the Republic of Korea and the National Research Foundation of Korea(NRF-2018S1A5A8026807)

scholarly journals Evaluation of serum adropin and irisin levels and its association with anthropometric obesity indices and biochemical parameters in Type 2 diabetic patients

2021 ◽  
pp. 1-8
Author(s):  
Foad Alzoughool ◽  
Huda Al Hourani ◽  
Manar Atoum ◽  
Sajedah Bateineh ◽  
Hanan Alsheikh ◽  
...  
Keyword(s):  
Negative Correlation ◽  
Biochemical Parameters ◽  
Significant Positive Correlation ◽  
Glycosylated Hemoglobin ◽  
Significant Negative Correlation ◽  
Diabetic Patients ◽  
Positive Correlation ◽  
Obesity Indices ◽  
Group Serum

BACKGROUND/AIM: The newly described proteins adropin and irisin are a highly conserved polypeptide that plays essential roles in metabolic and energy homeostasis, insulin resistance, and fat browning. The aim of this study is to evaluate the circulating levels of serum adropin and irisin in type 2 diabetes mellitus (T2DM) patients and also to elucidate possible relationships between serum adropin and irisin levels with anthropometric obesity indices and biochemical parameters. SUBJECTS AND METHODS: Single-center prospective observational study included 90 T2DM patients referred to the diabetes outpatient clinic. Height, weight, and waist circumference (WC) were measured. Body mass index (BMI) and waist to height ratio (WHtR) were calculated. Fasting blood glucose, glycosylated hemoglobin, serum lipids, creatinine, urea, and blood urea nitrogen were evaluated. Estimated glomerular filtration rate (GFR) was calculated, serum adropin and irisin were evaluated. RESULTS: The results showed a significant positive correlation between adropin and irisin in females but not in males (r = 0.311; P = 0.042). In males’ group, serum adropin levels showed significant negative correlation with serum glucose (–0.423, P = <  0.05), HbA1C (–0.364, P = <  0.05), and GFR (–0.355, P = <  0.05). In contrast, creatinine was showed a significant positive correlation with adropin in males (0.381, P = <  0.05). In females’ group, adropin showed a significant negative correlation with weight (–0.371, P = <  0.05), BMI (–0.349, P = <  0.05), WC (–0.402, P = <  0.01), and WHtR (–0.398, P = <  0.01). Contrary, in males’ group, serum irisin levels showed significant positive correlation with weight (0.338, P = <  0.05), BMI (0.332, P = <  0.05), WC (0.409, P = <  0.01), and WHtR (0.432, P = <  0.01). CONCLUSION: This study demonstrated that, in T2DM patients, circulating serum adrpoin correlated negatively with anthropometric obesity indices of obesity in females, while serum irisin was positively correlated with anthropometric obesity indices of obesity in males.

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