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Новости за 06.06.2019

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Effects of sex ratio on adult fecundity, longevity and egg hatchability of Bradysia difformis Frey at different temperatures

Plos.org 
En

by Yuping Gou, Guang Wang, Peter Quandahor, Qian Liu, Changzhong Liu

The fungus gnat Bradysia difformis Frey not only attacks edible and medicinal fungi, it also causes the damages to leek, green onion, garlic and other vegetable crops. To confirm the effects of temperature and sex ratio on adult fecundity, longevity and egg hatchability of B. difformis, we assayed the adults survival longevity and numbers of oviposition, as well as egg hatching rate under female-male ratios of 1:1, 1:2, 1:3, 2:1 and 3:1 at 10, 15, 20, 25 and 30°C. Читать дальше...



The diversity of interest in later-life entrepreneurship: Results from a nationally representative survey of Americans aged 50 to 70

Plos.org 
En

by Cal J. Halvorsen, Yu-Chih Chen

While older entrepreneurs are more likely to be male, white, and have higher levels of human, social, and financial capital, we know less about interest in later-life entrepreneurship. This study estimates entrepreneurial interest in a nationally representative sample of Americans aged 50 to 70 using partial proportional odds modeling. We estimate that more than 31 million older Americans have some interest in entrepreneurship and reveal key predictors of this interest (e.g.... Читать дальше...

Exploring the relationship between the speed-resolved perfusion of blood flux and HRV following different thermal stimulations using MSE and MFE analyses

Plos.org 
En

by Guangjun Wang, Shuyong Jia, Hongyan Li, Xiaojing Song, Weibo Zhang

Our previous study employed the classic laser Doppler flux (LDF) to explore the complexity of local blood flow signals and their relationship with heart rate variability (HRV). However, microcirculation blood flow is composed of different velocity components. To investigate the complexity of local speed-resolved perfusion and HRV following stimulation with different temperatures in healthy subjects, multiscale entropy (MSE)... Читать дальше...

Dietary exposure assessment of aluminium and cadmium from cocoa in relation to cocoa origin

Plos.org 
En

by Carolin Fechner, Matthias Greiner, Helmut Heseker, Oliver Lindtner

Cocoa contains aluminium and cadmium as environmental contaminants while concentrations are supposed to be country of origin-related. Integrating origin in dietary exposure assessment could refine calculations. Averages or higher percentiles of concentrations in cocoa powder from German Food Monitoring (GFM) and cocoa consumption from the German National Nutrition Survey II (NVS II) were combined in standard scenarios.... Читать дальше...

Modelling the impact of a Schistosoma mansoni vaccine and mass drug administration to achieve morbidity control and transmission elimination

Plos.org 
En

by Klodeta Kura, James E. Truscott, Jaspreet Toor, Roy M. Anderson

Mass drug administration (MDA) is, and has been, the principal method for the control of the schistosome helminths. Using MDA only is unlikely to eliminate the infection in areas of high transmission and the implementation of other measures such as reduced water contact improved hygiene and sanitation are required. Ideally a vaccine is needed to ensure long term benefits and eliminate the need for repeated drug treatment since... Читать дальше...

Aedes aegypti microRNA, miR-2944b-5p interacts with 3'UTR of chikungunya virus and cellular target vps-13 to regulate viral replication

Plos.org 
En

by Sunil Kumar Dubey, Jatin Shrinet, Sujatha Sunil

Background

RNA interference is among the most important mechanisms that serve to restrict virus replication within mosquitoes, where microRNAs (miRNAs) are important in regulating viral replication and cellular functions. These miRNAs function by binding to complementary sequences mostly in the untranslated regions of the target. Chikungunya virus (CHIKV) genome consists of two open reading frames flanked by 5′ and 3′ untranslated regions on the two sides. Читать дальше...

Новости России
Москва

«Турбозавры» поучаствовали в Дне московского транспорта


Modern technologies and algorithms for scaffolding assembled genomes

Plos.org 
En

by Jay Ghurye, Mihai Pop

The computational reconstruction of genome sequences from shotgun sequencing data has been greatly simplified by the advent of sequencing technologies that generate long reads. In the case of relatively small genomes (e.g., bacterial or viral), complete genome sequences can frequently be reconstructed computationally without the need for further experiments. However, large and complex genomes, such as those of most animals and plants, continue to pose significant challenges. Читать дальше...

Differential role of pre- and postsynaptic neurons in the activity-dependent control of synaptic strengths across dendrites

Plos.org 
En

by Mathieu Letellier, Florian Levet, Olivier Thoumine, Yukiko Goda

Neurons receive a large number of active synaptic inputs from their many presynaptic partners across their dendritic tree. However, little is known about how the strengths of individual synapses are controlled in balance with other synapses to effectively encode information while maintaining network homeostasis. This is in part due to the difficulty in assessing the activity of individual synapses with identified afferent... Читать дальше...

AMPK regulates germline stem cell quiescence and integrity through an endogenous small RNA pathway

Plos.org 
En

by Pratik Kadekar, Richard Roy

During suboptimal growth conditions, Caenorhabditis elegans larvae undergo a global developmental arrest called “dauer.” During this stage, the germline stem cells (GSCs) become quiescent in an AMP-activated Protein Kinase (AMPK)-dependent manner, and in the absence of AMPK, the GSCs overproliferate and lose their reproductive capacity, leading to sterility when mutant animals resume normal growth. These defects correlate with the altered abundance and distribution of a number of chromatin modifications... Читать дальше...

Crea targets brands with online savvy

BangkokPost.com 
En

A company founded by former Lazada executives, Crea, is touting its e-commerce expertise to help brands market to young people online.


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