scholarly journals Growth Dynamics of `Packham's Triumph' Pear Fruits

HortScience ◽  
1997 ◽  
Vol 32 (3) ◽  
pp. 443B-443
Author(s):  
Patricia I. Garriz ◽  
Hugo L. Alvarez ◽  
Graciela M. Colavita
Keyword(s):  
Linear Models ◽  
Cultural Practices ◽  
Growth Dynamics ◽  
Minimum Size ◽  
Lower Grade ◽  
Cross Sectional ◽  
Pooled Data ◽  
Growing Seasons ◽  
Local Standard ◽  
Fruit Mass

The objective of this work was to predict `Packham's Triumph' (Pyrus communis L.) fruit growth as a function of time using an empirical mathematical model. A mature crop was studied at the Experimental Farm of the Comahue National Univ., Rio Negro, Argentina, during the 1992–93, 1993–94, and 1994–95 growing seasons. Trees were selected at random and fruits were collected at weekly intervals. The range of sampling dates was 27 and 178 days after full bloom (DFB). Fresh fruit mass (FM) was measured using an electronic scale (n = 1169). Fruit number/trunk cross-sectional area was also determined; cultural practices were performed according to the local standard program. Equations were developed with SYSTAT procedure. Results showed that the following logistic model provided the most satifactory fit to the pooled data, as compared to the power and linear models: FM (g)= 316.081/(1+ e^5.030–0.039 DFB) R2=0.84 P < 0.001. The accuracy of predictions was tested on an independent crop in the 1995–96 growing season. According to the values of the statistical F test, no significant differences (Pr0.05) were detected between the mean squared deviations of the observed and the estimated values, suggesting that, overall, the model works well. It can provide growers with a means of determining adequate fruit mass at harvest, considering that unless a certain minimum size is obtained, the fruit will be given a lower grade and price.

Human density, economic level and frequency of canine helminths in Buenos Aires

2021 ◽  
Vol 95 ◽  
Author(s):  
D. Rubel ◽  
N. Flaibani
Keyword(s):  
Linear Models ◽  
Buenos Aires ◽  
Toxocara Canis ◽  
The Other ◽  
Green Spaces ◽  
Cross Sectional ◽  
Independent Variables ◽  
Economic Level ◽  
Faecal Samples ◽  
Human Density

Abstract The aim of this study was to explore through cross-sectional study the variation in the prevalence of parasitic helminths in canine faeces collected from green spaces of Buenos Aires according to the human density (HD) and economic level (EL) in the surroundings. HD and EL were considered as independent variables with three categories each. Twenty public squares (one hectare of surface) were randomly selected for each existing combination of the two independent variables. Ten random samples of fresh canine faeces were obtained in each square and analysed for helminths by the sedimentation and flotation techniques. The prevalence for each of the species was analysed using generalized linear models (GLM). The prevalence was modelled with a binomial error distribution and a logit link function. Helminth eggs were detected in 45 out of the 200 (22.5%) faecal samples collected and in 18 of the 20 green spaces sampled. The species observed were Ancylostoma caninum (13% of samples), Trichuris vulpis (8%) and Toxocara canis (4.5%). The GLM indicated that the prevalence of A. caninum in the slum areas (very high HD and very low EL) was higher than that in the other areas studied. However, the HD seemed to contribute more than the EL to the variations in the prevalence of A. caninum in faecal samples. The GLM showed no differences in the prevalence of the other parasite species for the different levels of the independent variables.

scholarly journals The Relationships Between Serum DHEA-S and AMH Levels in Infertile Women: A Retrospective Cross-Sectional Study

2021 ◽  
Vol 10 (6) ◽  
pp. 1211
Author(s):  
Li-Te Lin ◽  
Kuan-Hao Tsui
Keyword(s):  
Generalized Linear Models ◽  
Large Scale ◽  
Linear Models ◽  
Positive Association ◽  
Cross Sectional Study ◽  
Dehydroepiandrosterone Sulphate ◽  
Sectional Study ◽  
Cross Sectional ◽  
Infertile Women ◽  
The Relationship

The relationship between serum dehydroepiandrosterone sulphate (DHEA-S) and anti-Mullerian hormone (AMH) levels has not been fully established. Therefore, we performed a large-scale cross-sectional study to investigate the association between serum DHEA-S and AMH levels. The study included a total of 2155 infertile women aged 20 to 46 years who were divided into four quartile groups (Q1 to Q4) based on serum DHEA-S levels. We found that there was a weak positive association between serum DHEA-S and AMH levels in infertile women (r = 0.190, p < 0.001). After adjusting for potential confounders, serum DHEA-S levels positively correlated with serum AMH levels in infertile women (β = 0.103, p < 0.001). Infertile women in the highest DHEA-S quartile category (Q4) showed significantly higher serum AMH levels (p < 0.001) compared with women in the lowest DHEA-S quartile category (Q1). The serum AMH levels significantly increased across increasing DHEA-S quartile categories in infertile women (p = 0.014) using generalized linear models after adjustment for potential confounders. Our data show that serum DHEA-S levels are positively associated with serum AMH levels.

scholarly journals Assessment of the relationship between estimated cardiovascular risk and structural damage in patients with axial spondyloarthritis

2020 ◽  
Vol 12 ◽  
pp. 1759720X2098283
Author(s):  
María Lourdes Ladehesa-Pineda ◽  
Iván Arias de la Rosa ◽  
Clementina López Medina ◽  
María del Carmen Castro-Villegas ◽  
María del Carmen Ábalos-Aguilera ◽  
...  
Keyword(s):  
Risk Factors ◽  
Cluster Analysis ◽  
Structural Damage ◽  
Disease Duration ◽  
Linear Models ◽  
Axial Spondyloarthritis ◽  
Subclinical Atherosclerosis ◽  
Intima Media Thickness ◽  
Atherosclerotic Plaques ◽  
Cross Sectional

Aims: To evaluate the association of estimated cardiovascular (CV) risk and subclinical atherosclerosis with radiographic structural damage in patients with axial spondyloarthritis (axSpA). Methods: Cross-sectional study including 114 patients axSpA from the SpA registry of Córdoba (CASTRO) and 132 age- and sex-matched healthy controls (HCs). Disease activity and the presence of traditional CV risk factors were recorded. The presence of atherosclerotic plaques and carotid intima media thickness (cIMT) were evaluated through carotid ultrasound and the SCORE index was calculated. Radiographic damage was measured though modified Stoke Ankylosing Spondylitis Spinal Score (mSASSS). The association between mSASSS and SCORE was tested using generalized linear models (GLM), and an age-adjusted cluster analysis was performed to identify different phenotypes dependent on the subclinical CV risk. Results: Increased traditional CV risk factors, SCORE, and the presence of carotid plaques were found in axSpA patients compared with HCs. The presence of atherosclerotic plaques and SCORE were associated with radiographic structural damage. The GLM showed that the total mSASSS was associated independently with the SCORE [β coefficient 0.24; 95% confidence interval (CI) 0.10–0.38] adjusted for disease duration, age, tobacco, C-reactive protein, and non-steroidal anti-inflammatory drugs (NSAID) intake. Hard cluster analysis identified two phenotypes of patients. Patients from cluster 1, characterized by the presence of plaques and increased cIMT, had a higher prevalence of CV risk factors and SCORE, and more structural damage than cluster two patients. Conclusion: Radiographic structural damage is associated closely with increased estimated CV risk: higher SCORE levels in axSpA patients were found to be associated independently with mSASSS after adjusting for age, disease duration, CRP, tobacco and NSAID intake.

scholarly journals Gender Differences in Phytoestrogens and the Relationship with Speed of Processing in Older Adults: A Cross-Sectional Analysis of NHANES, 1999–2002

Nutrients ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1780 ◽  
Author(s):  
Alwerdt ◽  
Patterson ◽  
Sliwinski
Keyword(s):  
Older Adults ◽  
Gender Differences ◽  
Cognitive Aging ◽  
Linear Models ◽  
Speed Of Processing ◽  
Cross Sectional ◽  
Health And Nutrition ◽  
Performance Results ◽  
Sectional Analysis ◽  
The Relationship

Sex hormone changes in adults are known to play a part in aging, including cognitive aging. Dietary intake of phytoestrogens can mimic estrogenic effects on brain function. Since sex hormones differ between genders, it is important to examine gender differences in the phytoestrogen–cognition association. Therefore, the goal of this study is to examine the relationship between urinary phytoestrogens and speed of processing (SOP) and the variation of the association between genders in older adults. Participants were drawn from the 1999–2002 National Health and Nutrition Examination Survey and included 354 individuals aged 65–85 years old. General linear models (GLMs) were used to test for significant gender differences in the relationship between phytoestrogens and SOP. Results from the GLMs showed significant gender differences in the relationship between genistein and SOP. Higher levels of genistein were associated with better SOP in women. This relationship was reversed in men: higher genistein levels were associated with worse performance. Results indicate that there are distinct gender differences in the relationship between genistein and SOP. These results emphasize the importance of considering gender differences when devising dietary and pharmacologic interventions that target phytoestrogens to improve brain health.

Abstract P227: Circulating and Dietary Linoleic Acid and Prevalent Diabetes in Post-Myocardial Infarction Patients

Circulation ◽  
2018 ◽  
Vol 137 (suppl_1) ◽  
Author(s):  
Kamalita Pertiwi ◽  
Anne J Wanders ◽  
Peter L Zock ◽  
Marjolein C Harbers ◽  
Johanna M Geleijnse
Keyword(s):  
Myocardial Infarction ◽  
Linoleic Acid ◽  
Linear Models ◽  
Antihypertensive Drugs ◽  
Plasma Cholesterol ◽  
Epidemiological Studies ◽  
Dietary Factors ◽  
Metabolic Parameters ◽  
Cross Sectional ◽  
Total Fatty Acids

Background: Circulating linoleic acid 18:2n-6 (LA) has been considered to reflect LA intake, but its utility as a dietary biomarker could be affected by metabolism. Objective: To study the associations of plasma and dietary LA with T2D prevalence in drug-treated patients with a history of myocardial infarction (MI). Methods: Cross-sectional analysis of baseline data in 4,072 Dutch post-MI patients of the Alpha Omega Cohort. Circulating LA (as % of total fatty acids) was assessed in plasma cholesterol esters (CE) in the total cohort and in plasma phospholipids (PL) in a random subset of 833 patients. LA intake was assessed by a 203-item validated food frequency questionnaire. Prevalence ratios of T2D and associations with metabolic parameters were estimated in plasma and dietary LA quintiles using multivariable generalized linear models adjusted for demographic, lifestyle and dietary factors. Results: Patients were on average 69 years old, 79% was male and 77% were overweight or obese. Most patients used statins (86%), antihypertensive drugs (90%) and antiplatelet drugs (84%). A total of 813 patients (20%) had T2D. Mean LA intake (±SD) was 5.7±2.2 energy%, and circulating LA was 49.9±5.0% in CE and 18.7±3.0% in PL. Spearman’s correlations of dietary LA with circulating LA in CE and PL were 0.16 and 0.10, respectively. Higher plasma LA, but not dietary LA, was significantly associated with a lower diabetes prevalence (Table 1). BMI (β= -0.07, p<0.001), log non-fasting triglycerides (β= -0.01, p<0.001), log non-fasting glucose (β= -0.01, p<0.001), and log alcohol intake (β= -0.03, p<0.001) were significantly associated with circulating LA in plasma CE. Similar associations were found for LA in plasma PL. Dietary LA was not significantly associated with T2D prevalence and metabolic parameters (all p>0.05). Conclusions: Circulating LA may reflect both LA intake and metabolic state in drug-treated post-MI patients. This bears restrictions for its use as a biomarker of dietary LA intake in epidemiological studies.

A STUDY ON EXPRESSION PROFILE OF BASAL MARKER CD44 AND LUMINAL MARKER CK20 IN UROTHELIAL NEOPLASM AND ITS CORRELATION WITH WHO GRADING AND STAGING OF TUMOUR

2021 ◽  
pp. 29-32
Author(s):  
Krishnendubikas Bag ◽  
Anish kumar Rakshit ◽  
Gopinath Barui
Keyword(s):  
Urothelial Carcinoma ◽  
West Bengal ◽  
Strong Association ◽  
Lower Grade ◽  
Tumour Grade ◽  
Cross Sectional ◽  
Over Expression ◽  
Medical College ◽  
Basal Marker ◽  
Luminal Marker

Aim: Histomorphological study of urothelial carcinoma on TRBT and Cystectomy specimen and its categorization on the basis of WHO grading & pTNM staging and to nd out the correlation between CK20 and CD44 exprression with tumour grade, pTNM staging. Material And Method: This descriptive cross sectional prospective study was conducted in the Department of Pathology, R G Kar Medical College & Hospital Kolkata in collaboration with Department of Urosurgery, R G Kar Medical College & Hospital, Kolkata, West Bengal. The present study is intended to nd out over expression of CD44 & CK20 in Urothelial Carcinoma of Bladder and correlate with tumour grade and clinical features. Result: There is strong association between CD44, CK20 expression and Stage of Urothelial Carcinoma cases and had a strong association between CD44 expressions and grade Urothelial Carcinoma cases. Conclusion: CK20 overexpression was seen more signicantly in High Grade tumours HGPUC (p < 0.05) as well as advanced stage pT2 and CD44 overexpression was more signicantly in lower grade tumours LGPUC (p<0.05) as well as lower stages pT1 in urothelial carcinoma. An inverse relasionship was noted in the staining patterns of CK20 and CD44 within individual cases as well as aggregate data,with (68.24%) of tumours with CD44 loss showing CK20 positivity.

Association of Age at Onset With Gray Matter Volume and White Matter Microstructural Abnormalities in People With Multiple Sclerosis

Neurology ◽  
2021 ◽  
pp. 10.1212/WNL.0000000000012869
Author(s):  
Raffaello Bonacchi ◽  
Alessandro Meani ◽  
Elisabetta Pagani ◽  
Olga Marchesi ◽  
Andrea Falini ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
White Matter ◽  
Gray Matter ◽  
Linear Models ◽  
Gray Matter Volume ◽  
Age At Onset ◽  
Healthy Controls ◽  
Compensatory Mechanisms ◽  
Cross Sectional ◽  
Matter Volume

Objective:To investigate whether age at onset influences brain gray matter volume (GMV) and white matter (WM) microstructural abnormalities in adult multiple sclerosis (MS) patients, given its influence on clinical phenotype and disease course.Method:In this hypothesis-driven cross-sectional study, we enrolled 67 pediatric-onset MS (POMS) patients and 143 sex- and disease duration (DD)-matched randomly-selected adult-onset MS (AOMS) patients, together with 208 healthy controls. All subjects underwent neurological evaluation and 3T MRI acquisition. MRI variables were standardized based on healthy controls, to remove effects of age and sex. Associations with DD in POMS and AOMS patients were studied with linear models. Time to reach clinical and MRI milestones was assessed with product-limit approach.Results:At DD=1 year, GMV and WM fractional anisotropy (FA) were abnormal in AOMS but not in POMS patients. Significant interaction of age at onset (POMS vs AOMS) into the association with DD was found for GMV and WM FA. The crossing point of regression lines in POMS and AOMS patients was at 20 years of DD for GMV and 14 for WM FA. For POMS and AOMS patients, median DD was 29 and 19 years to reach Expanded Disability Status Scale=3 (p<0.001), 31 and 26 years to reach abnormal Paced Auditory Serial Addition Task-3 (p=0.01), 24 and 18 years to reach abnormal GMV (p=0.04), and 19 and 17 years to reach abnormal WM FA (p=0.36).Conclusions:Younger patients are initially resilient to MS-related damage. Then, compensatory mechanisms start failing with loss of WM integrity, followed by GM atrophy and finally disability.

scholarly journals Nonlinear modeling growth body weight of Mangalarga Marchador horses

2017 ◽  
Vol 47 (4) ◽  
Author(s):  
Felipe Amorim Caetano Souza ◽  
Tales Jesus Fernandes ◽  
Raquel Silva de Moura ◽  
Sarah Laguna Conceição Meirelles ◽  
Rafaela Aparecida Ribeiro ◽  
...  
Keyword(s):  
Body Weight ◽  
Linear Models ◽  
Nonlinear Modeling ◽  
Growth Curves ◽  
Live Weight ◽  
Information Criterion ◽  
Coefficient Of Determination ◽  
Cross Sectional ◽  
Adult Body Weight ◽  
The Cross

ABSTRACT: The analysis of the growth and development of various species has been done using the growth curves of the specific animal based on non-linear models. The objective of the current study was to evaluate the fit of the Brody, Gompertz, Logistic and von Bertalanffy models to the cross-sectional data of the live weight of the MangalargaMarchador horses to identify the best model and make accurate predictions regarding the growth and maturity in the males and females of this breed. The study involved recording the weight of 214 horses, of which 94 were males and 120 were non-pregnant females, between 6 and 153 months of age. The parameters of the model were estimated by employing the method of least squares, using the iteratively regularized Gauss-Newton method and the R software package. Comparison of the models was done based on the following criteria: coefficient of determination (R²); Residual Standard Deviation (RSD); corrected Akaike Information Criterion (AICc). The estimated weight of the adult horses by the models ranged between 431kg and 439kg for males and between 416kg and 420kg for females. The growth curves were studied using the cross-sectional data collection method. For males the von Bertalanffymodel was found to be the most effective in expressing growth, while in females the Brody model was more suitable. The MangalargaMarchador females achieve adult body weight earlier than the males.

scholarly journals Association between a vegetarian diet and emotional symptoms: a cross-sectional study among adolescents in four developing countries

2018 ◽  
Vol 0 (0) ◽  
Author(s):  
Alejandra Santivañez-Romani ◽  
Valeria Carbajal-Vega ◽  
Reneé Pereyra-Elías
Keyword(s):  
Developing Countries ◽  
Linear Models ◽  
Global Analysis ◽  
Secondary Analysis ◽  
Vegetarian Diet ◽  
Cross Sectional Study ◽  
Self Report ◽  
Sentinel Site ◽  
Emotional Symptoms ◽  
Cross Sectional

AbstractBackgroundStudies assessing the association between vegetarianism and mental health have found divergent results. Evidence from adolescents in developing countries is scarce.ObjectiveTo evaluate the association between a vegetarian diet and emotional symptoms in 15-year-old adolescents from Ethiopia, India, Peru and Vietnam.MethodsA cross-sectional, secondary analysis of the Young Lives cohort study was used. The exposure variable was the self-report of being a vegetarian (yes or no). The outcome was the level of emotional symptoms, numerically evaluated using the score obtained in the subscale “Emotional Symptoms” of the Strengths and Difficulties Questionnaire (SDQ). We calculated crude and adjusted coefficients (β) with 95% confidence intervals (95% CIs), using generalized linear models of the Gaussian family, considering each sentinel site as a cluster. The analysis was stratified by country. Additionally, we made a global analysis including the four countries.ResultsA total of 3484 adolescents were analyzed. The overall prevalence of vegetarianism was 4.4%, but it varied between countries (from 0.4% in Vietnam to 11.5% in India). The average emotional symptoms score was 3.5 [standard deviation (SD) 2.3] points. The scores were not statistically different between vegetarians and non-vegetarians (p > 0.05). In the adjusted analysis, in Vietnam, vegetarians had lower emotional symptoms scores on average than non-vegetarians [β: −1.79; 95% CI: −3.05 to −0.55]. No differences were found neither in the other countries nor in the overall sample.ConclusionThere was no association between a vegetarian diet and emotional symptoms in the analyzed adolescents of four developing countries.

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