Results 61 to 70 of about 1,115,302 (317)

Effect of fire severity on organic carbon, total nitrogen and available phosphorus of forest soils (Case study: Marivan) [PDF]

تحقیقات جنگل و صنوبر ایران, 2012
Fire is natural feature of most of ecosystems, including Mediterranean region and the site study in this research. In order to evaluate effect of fire intensity on dynamic of organic carbon, nitrogen and phosphorus of soil, 56 samples were selected from ...
Farzaneh Nazari, Vaheid Hosseini, Naghi Shabanian   +2 more
doaj   +1 more source

PARK(ing) time–How park deficiency affects the biological clock in a Drosophila model of Parkinson's disease

FEBS Letters, EarlyView.
Drosophila park mutants serve as a model for Parkinson's disease. We used this strain to investigate the connection between oxidative stress and the circadian clock mechanism. We showed that increased oxidative stress affects the physiology of pacemaker cells, disrupting their daily structural plasticity. Lack of rhythmic signaling from pacemaker cells
Kamila Zientara, Kinga Skoczek, Elzbieta Pyza, Milena Damulewicz   +3 more
wiley   +1 more source

Nitrogen use efficiency of silage corn with contrasting nitrogen fertility sources in a semi-arid system

Frontiers in Agronomy
Silage corn production in semi-arid environments poses challenges for sustainable intensification and soil health due to the removal of aboveground biomass during harvest.
Phearen Miller, Avneet Kakkar, Jeanette M. Norton   +2 more
doaj   +1 more source

Comparison of multivariate models and variable selection algorithms for rapid analysis of the chemical composition of field crops

Acta Agriculturae Scandinavica. Section B, Soil and Plant Science, 2019
This study evaluates the use of visible and near-infrared spectroscopy for rapid prediction of total carbon, total nitrogen, and total phosphorus concentrations in field crop samples.
Shengxiang Xu, Meiyan Wang, Xuezheng Shi
doaj   +1 more source

Comparison between Random Forests, Artificial Neural Networks and Gradient Boosted Machines Methods of On-Line Vis-NIR Spectroscopy Measurements of Soil Total Nitrogen and Total Carbon

Sensors, 2017
Accurate and detailed spatial soil information about within-field variability is essential for variable-rate applications of farm resources. Soil total nitrogen (TN) and total carbon (TC) are important fertility parameters that can be measured with on ...
Said Nawar, Abdul M. Mouazen
doaj   +1 more source

Three phosphatase families form a community: The phosphohydrolases that act upon inositol pyrophosphates

FEBS Letters, EarlyView.
Inositol pyrophosphates are energy‐rich signaling molecules that perform critical functions in cells. Three different families of phosphatases hydrolyze the β phosphate of the inositol pyrophosphate molecules: two have narrow specificities and one is promiscuous.
Ronda J. Rolfes
wiley   +1 more source

Nitrogen-rich animal and plant wastes as fertilizer improve the soil carbon/nitrogen ratio and plant branching and thickening of young walnut trees under deficit irrigation conditions

, 2023
To investigate the physiological status of plant following the application of a mixture of organic residues, nitrogen-rich meat powder and alfalfa (Medicago sativa L.) powder mixed in different proportions as fertilizers were applied to the soil of a ...
Yanan Zhang (1322391), Jie Zhang (64655), Yujing Hu (4097848), Jiawei Liu (553742), Yuncong Yao (575709), Xinhui Chen (2015044)   +5 more
core   +1 more source

Reconstructing enzyme evolution by protein engineering

FEBS Letters, EarlyView.
Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler, Markus R. Busch, Reinhard Sterner   +2 more
wiley   +1 more source

Reactive Nitrogen in the Tropical Troposphere [PDF]

, 2013
The aim of this project was to calibrate a thermal-decomposition chemiluminescence (TD-Chem) instrument, capable of measuring the composition of the reactive nitrogen pool at the Cape Verde Atmospheric Observatory (CVAO) in the remote tropical ...
Manning, William D
core  

Ecosystem carbon balance of temperate forests differing in elevation and nitrogen availability [PDF]

, 2014
This PhD thesis addressed the carbon (C) balance of temperate deciduous forests across natural gradients of temperature and nitrogen (N) availability, the major drivers of net primary production (NPP) and the soil C balance.
Caprez, Riccarda
core   +1 more source