Results 81 to 90 of about 730,247 (315)

Analysis of General Humoral Immunity HIV Dynamics Model with HAART and Distributed Delays

Mathematics, 2019
This paper deals with the study of an HIV dynamics model with two target cells, macrophages and CD4 + T cells and three categories of infected cells, short-lived, long-lived and latent in order to get better insights into HIV infection within the
A. M. Elaiw, E. Kh. Elnahary
doaj   +1 more source

Oscillation and Global Asymptotic Stability

Journal of Mathematical Analysis and Applications, 2000
The authors establish oscillation results and global asymptotic stability for the difference equation \[ y_{n+1}= A+{y_ny_{n-2} \cdots y_{n-(2k-2)} \over y_{n-1}y_{n-3} \cdots y_{n-(2k-1)}},\;A>0,\;k\geq 2,\;n\geq 2k. \] For related results see the paper of \textit{R. De Vault}, \textit{G. Ladas} and \textit{S. W. Schultz} [Proc. Am. Math. Soc. 126, No.
Mishev, D.P, Patula, W.T
openaire   +2 more sources

Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation

FEBS Letters, EarlyView.
Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe, Tanmay Kumar Mohanty, Rashna Bhandari, Dorothea Fiedler   +3 more
wiley   +1 more source

Impact of modified biochar on phosphorus fractionation and biochemical properties for different soils

Environmental Sciences Europe
Modified (metal oxide) biochar is widely used for the remediation of degraded soils, but there has been limited research work on its effect on phosphorus fractionation and biochemical properties under different soil conditions.
Muhammad Numan Khan, Jing Huang, Asad Shah, Hao Xiaoyu, Tianfu Han, Avelino Núñez-Delgado, Nafiu Garba Hayatu, Imtiaz Ahmed, Wenjie Liu, Ashutosh Kumar Singh, Xiai Zhu, Huimin Zhang   +11 more
doaj   +1 more source

An upstream open reading frame regulates expression of the mitochondrial protein Slm35 and mitophagy flux

FEBS Letters, EarlyView.
This study reveals how the mitochondrial protein Slm35 is regulated in Saccharomyces cerevisiae. The authors identify stress‐responsive DNA elements and two upstream open reading frames (uORFs) in the 5′ untranslated region of SLM35. One uORF restricts translation, and its mutation increases Slm35 protein levels and mitophagy.
Hernán Romo‐Casanueva, Ariann E. Mendoza‐Martínez, P. Abril Medina‐Flores, Carlos Campero‐Basaldua, Alexander DeLuna, Soledad Funes   +5 more
wiley   +1 more source

Relationships Between Soil Phosphorus Fractions and Greenhouse Gas Emissions in Degraded Red and Black Soils Amended With Magnesium Treated Biochar

GCB Bioenergy
This study investigated the effects of pristine biochar (BC) and magnesium‐treated biochar (Mg‐BC), applied at 0%, 1%, and 2.5% (w/w), on the relationship between P fractions and GHG emissions in two degraded soils.
Muhammad Numan Khan, Tianfu Han, Jing Huang, Asad shah, Hao Xiaoyu, Avelino Núñez‐Delgado, Tanveer Ali Sial, Wenjie Liu, Ashutosh Kumar Singh, Xingzhu Ma, Huimin Zhang   +10 more
doaj   +1 more source

Symplectic Approach to Global Stability

We present a new approach to the problem of proving global stability, based on symplectic geometry and with a focus on systems with several conserved quantities. We also provide a proof of instability for integrable systems whose momentum map is everywhere regular.
Verónica Errasti Díez, Jordi Gaset Rifá, Manuel Lainz Valcázar   +2 more
openaire   +2 more sources

Global stability in job systems

Journal of Mathematical Analysis and Applications, 1988
A simple job system with n grades is introduced here and it is described by a system \(\dot x_ i=x_ i\sum^{n}_{j=1}a_{ij}x_ j\), \(i=1,2,...,n\). The per capita growth rate coefficients \(a_{ij}\) are such that \(a_{ii}0\), \(i\neq j\). Under these conditions a complete picture of the phase portrait of the system is presented as follows: Let \(A=(a_{ij}
Karakostas, G., Gyori, I.
openaire   +2 more sources

The (Glg)ABCs of cyanobacteria: modelling of glycogen synthesis and functional divergence of glycogen synthases in Synechocystis sp. PCC 6803

FEBS Letters, EarlyView.
We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee, Dimitrios Bekiari, Sofia Doello, Karl Forchhammer   +3 more
wiley   +1 more source

A discussion on fiscal policies implemented in EU during and after the great recession

, 2022
Along with the global financial crisis that took place in 2008, the ineffectiveness of other policies used for exiting from the crisis has brought back the feasibility of fiscal policy as an alternative.
Polat, Onur, Polat, Gozde Es
core   +1 more source