Results 81 to 90 of about 13,071,015 (306)

A Dynamic Extension of the Period Life Table [PDF]

The standard period life table is based entirely on the death probabilities of the given period. Popular (not expert) usage of life expectancies from a period table typically ignores the fact that the expectancies make no allowance for future declines in
Byron G Spencer, Frank T Denton
core  

Synergistic perspectives—How single‐molecule biophysics complement biochemical understanding

FEBS Letters, EarlyView.
In this review, we discuss how ensemble biochemistry and single‐molecule approaches are complementary, outline commonly used single‐molecule techniques, and illustrate their relevance through two representative case studies: chromatin organization by SMC complexes and pathway choice during DNA double‐strand break repair.
Sara De Bragança, Eline L. Jansen, Jorine M. Eeftens   +2 more
wiley   +1 more source

Microbial biopesticides affected age-stage life table of the tomato leaf miner, Tuta absoluta (Lepidoptera – Gelechiidae)

Egyptian Journal of Biological Pest Control, 2018
The tomato leaf miner, Tuta absoluta (Meyric), second instar larvae were exposed for 1 day to LC50 of Bacillus thuringiensis (Berliner) subsp. kurstaki or Beauveria bassiana (Balsamo) on treated tomato foliages. Treated larvae had the longest development
Aly A. Younes, Nawal Z. M. Zohdy, Hazem A. Abul fadl, Reham Fathy   +3 more
doaj   +1 more source

Life Table and Demographic Parameters of Helopeltis theivora Waterhouse (Hemiptera: Miridae)

Journal of Experimental Biology and Agricultural Sciences
Helopeltis theivora is a significant pest of tea, causing economic losses through direct feeding damage to tender shoots in various tea-growing regions of Asia, including Malaysia. Understanding the population dynamics of this pest through life table analysis and demographic parameters is essential for identifying critical stages in its life cycle that
Shovon Kumar Paul, Nur Azura Adam, Syari Jamian, Anis Syahirah Mokhtar   +3 more
openaire   +1 more source

Significance of life table estimates for small populations: Simulation-based study of estimation errors [PDF]

We study bias, standard errors, and distributions of characteristics of life tables for small populations. Theoretical considerations and simulations show that statistical efficiency of different methods is, above all, affected by the population size ...
Dalkhat Ediev, Sergei Scherbov
core  

Structures of mycobacterial 3‐methylcrotonyl‐CoA carboxylase reveal carrier‐domain translocation between catalytic sites

FEBS Letters, EarlyView.
Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav, Bogdan I. Florea, Sebastian Geibel   +2 more
wiley   +1 more source

Biological Control of Date Palm Mite Oligonychus afrasiaticus (McGregor) (Acari: Tetranychidae) Using the Predatory Mite Euseius scutalis (Athias-Henriot) (Acari: Phytoseiidae) Under Laboratory and Field Conditions

Biology
The date palm mite Oligonychus afrasiaticus is one of the most destructive phytophagous pests in date palm orchards and can cause severe economic losses when not effectively managed.
Mahmoud M. Al-Azzazy, Saleh S. Alhewairini   +1 more
doaj   +1 more source

Boundary Condition Sets Limits on Brass’s Model Life Table Parameters

Canadian Studies in Population, 1995
The Brass mortality model is based on a strong linear relationship between the logits of the survivorship probabilities of any two life tables. This strong empirical relationship justifies the construction of model life tables from any life table taken as a standard by manipulating the values of the parameters of the linear equation. The purpose here
openaire   +2 more sources

Estimation of multi-state life table functions and their variability from complex survey data using the SPACE Program [PDF]

The multistate life table (MSLT) model is an important demographic method to document life cycle processes. In this study, we present the SPACE (Stochastic Population Analysis for Complex Events) program to estimate MSLT functions and their sampling ...
Liming Cai, Yasuhiko Saito, Aaron Hagedorn, James Lubitz, Eileen Crimmins, Mark Hayward   +5 more
core  

From junk to function — How weak selection in eukaryotes builds new parts and drives genomic complexity

FEBS Letters, EarlyView.
How do genomes gain new functional parts? In eukaryotes, which tend to evolve under weak selection, much of the genome is junk. Palazzo and Qiu borrow the logic of Markov chains to show how non‐functional DNA becomes functional through the appearance of intermediate states, which arise due to epistasis, buffering, and biochemical messiness, allowing ...
Alexander F. Palazzo, Yi Qiu
wiley   +1 more source