Changes in life tables of Rhodnius neivai due to variations of environmental temperature were studied, based on nine cohorts. Three cohorts were kept at 22 degrees C, three at 27 degrees C and three at 32 degrees C. Cohorts were censused daily during nymphal instars and weekly in adults. Nine complete horizontal life tables were built. A high negative correlation between temperature and age at first laying was registered (r=-0,84). Age at maximum reproduction was significantly lower at 32 degrees C. Average number of eggs/female/week and total eggs/female on its life time were significantly lower at 22 degrees C. Total number of egg by cohort and total number of reproductive weeks were significantly higher at 27 degrees C. At 32 degrees C, generational time was significantly lower. At 27 degrees C net reproductive rate and total reproductive value were significantly higher. At 22 degrees C, intrinsic growth, finite growth and finite birth rates were significantly lower. At 22 degrees C, death instantaneous rate was significantly higher.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1590/s0074-02761999000500028 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Comparison of Five Pathological Tumor Regression Grading Systems for Rectal Cancer Following Chemoradiation: Correlation Coefficient and Intra-Rater Reliability.
Asian Pac J Cancer Prev
January 2025
Department of Pathology, Phramongkutklao College of Medicine, Thailand.
Objective: To determine the correlation among five different types of tumor regression grading (TRG) systems. Test-retest reliability analyses were conducted at two time points to assess the internal validity and consistency of these five TRG systems.
Methods: A test-retest study was performed in 34 pathologically confirmed rectal adenocarcinoma specimens.
Effect of transgene on salt tolerance of tobacco.
Transgenic Res
January 2025
Forest Department, College of Forestry, Hebei Agricultural University, Baoding, 071000, China.
To explore the effects of salt-tolerance gene accumulation on salt tolerance in transgenic plant, we used four types of plant expression vector (N27, N28, N29, and N30) carrying mtlD, mtlD + gutD, mtlD + gutD + BADH, mtlD + gutD + BADH + sacB genes respectively, to transform tobacco through Agrobacterium-mediated method. Transgenic lines were identified through polymerase chain reaction (PCR) detection. Transgenic lines and non-transgenic plant (CK) were subjected to 6‰ sodium chloride solution stress; then, fluorescence quantitative PCR (FQ-PCR) and salt tolerance indexes were used to assess characteristics.
View Article and Find Full Text PDFEvidence for the anxiolytic- and antidepressant-like effects of three semi-synthetic derivatives of xylopic acid in mice.
Naunyn Schmiedebergs Arch Pharmacol
January 2025
Department of Pharmacology and Toxicology, School of Pharmacy, University of Health and Allied Sciences, Ho, Ghana.
Purpose: Major depressive disorder is one of the most common and burdensome psychiatric disorders worldwide. This study evaluated the anxiolytic- and antidepressant-like activity of three semi-synthetic derivatives of xylopic acid (XA) to identify the most promising derivative based on mechanism(s) of action, in vivo pharmacokinetics and in vitro cytotoxicity.
Methods: The anxiolytic potential and the involvement of GABAergic mechanisms were assessed in the elevated plus-maze and open field tests in mice.
Vitamin B2 Operates by Dual Thermodynamic and Kinetic Mechanisms to Selectively Tailor Urate Crystallization.
J Am Chem Soc
January 2025
Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States.
Here we demonstrate how a biologically relevant molecule, riboflavin (vitamin B2), operates by a dual mode of action to effectively control crystallization of ammonium urate (NHHU), which is associated with cetacean kidney stones. In situ microfluidics and atomic force microscopy experiments confirm a strong interaction between riboflavin and NHHU crystal surfaces that substantially inhibits layer nucleation and spreading by kinetic mechanisms of step pinning and kink blocking. Riboflavin does not alter the distribution of tautomeric urate isomers, but its adsorption on NHHU crystal surfaces does interfere with the effects of minor urate tautomer by limiting its ability to induce NHHU crystal defects while also suppressing NHHU nucleation and inhibiting crystal growth by 80% at an uncharacteristically low modifier concentration.
View Article and Find Full Text PDFAssessment of verbal and nonverbal cognitive abilities in children with stuttering using 5th edition Stanford Binet.
Appl Neuropsychol Child
January 2025
National Research Center, Giza, Egypt.
Unlabelled: Stuttering is a speech disorder disrupting fluency with implications that could affect psychological, educational, social, and occupational aspects of life. Cognitive functions include mental processes that allows for execution of goal-directed responses in different situations. They are usually referred to as executive functions (EF) which consists of three main components, working memory, cognitive flexibility, and inhibitory control.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!