scholarly journals Mathematical modelling of surface irrigation for field crops in Jordan based on soil hydrological-physical properties

2021 ◽  
pp. 137-148
Author(s):  
Mohunnad Massimi

Jordan suffers from drought and depletion of water resources. In-field crop management, the issue of irrigation scheduling is important and influential. In this research note, a simple method was developed for scheduling surface irrigation of field crops based on inputs of crop ecology, effective root depth, soil texture, soil hydrology, and logical mathematics. It was concluded that the science of mathematics has succeeded to meet academic irrigation scheduling in terms of surface irrigation for field crops based on both soil hydrological and physical traits. Extension scholar has a decision to choose mathematical irrigation model depends on the traditional inputs or updating the model by searching for renewable inputs such as different varieties root depths, optimum row spacing of each crop, drip irrigation mathematical modelling, and digital sensing. In both cases, the input related to the effective root depth is a major and basic factor in mathematical irrigation scheduling. It is, therefore, recommendable that extension research-based systems should focus on basic mathematics to capacitate the complementary role of academics, research, and extension in irrigation modelling, and rural development.

2021 ◽  
Vol 22 (10) ◽  
pp. 5112
Author(s):  
Lotte van Beek ◽  
Éilís McClay ◽  
Saleha Patel ◽  
Marianne Schimpl ◽  
Laura Spagnolo ◽  
...  

Poly (ADP-ribose) polymerases (PARP) 1-3 are well-known multi-domain enzymes, catalysing the covalent modification of proteins, DNA, and themselves. They attach mono- or poly-ADP-ribose to targets using NAD+ as a substrate. Poly-ADP-ribosylation (PARylation) is central to the important functions of PARP enzymes in the DNA damage response and nucleosome remodelling. Activation of PARP happens through DNA binding via zinc fingers and/or the WGR domain. Modulation of their activity using PARP inhibitors occupying the NAD+ binding site has proven successful in cancer therapies. For decades, studies set out to elucidate their full-length molecular structure and activation mechanism. In the last five years, significant advances have progressed the structural and functional understanding of PARP1-3, such as understanding allosteric activation via inter-domain contacts, how PARP senses damaged DNA in the crowded nucleus, and the complementary role of histone PARylation factor 1 in modulating the active site of PARP. Here, we review these advances together with the versatility of PARP domains involved in DNA binding, the targets and shape of PARylation and the role of PARPs in nucleosome remodelling.


Author(s):  
Shana Tehrani ◽  
Sudhir Rathore ◽  
Vinod Achan

Abstract Background Management of heavily calcified coronary arteries is still a major challenge in interventional cardiology. Inadequate stent expansion in calcific lesions is the single most important predictor of stent thrombosis and in-stent restenosis. Rotational atherectomy (RA) is an important tool to modify the calcium burden but is associated with limitations and requires specific skills. Intravascular lithotripsy (IVL) is a novel technique to treat calcified stenotic lesions and has been proposed as an alternative to RA with promising results. Case summary We report a case of a patient with severely calcified right coronary artery stenosis successfully treated with combination of RA and IVL. Discussion In this case, we demonstrate that the RA and IVL are complementary strategies, not sufficient on their own and not alternative to each other.


2005 ◽  
Vol 26 (3) ◽  
pp. 284
Author(s):  
G. Gnanasegaran ◽  
A. Rossiter ◽  
J.R. Buscombe ◽  
M.E. Caplin ◽  
D. McCool ◽  
...  

2013 ◽  
Vol 47 (5) ◽  
pp. 778-778 ◽  
Author(s):  
Jung Im Suk ◽  
Christina M. Sigur ◽  
Francis O. Walker
Keyword(s):  

2005 ◽  
Vol 6 (Suppl 3) ◽  
pp. S15
Author(s):  
Najl Valeyev ◽  
Andrei Skorinkin ◽  
Kristy Downing ◽  
Iain Campbell ◽  
Nikolai Kotov

2012 ◽  
Vol 6 (3) ◽  
pp. 1032-1037 ◽  
Author(s):  
Mohammad Reza Khakzad ◽  
Maryam Javanbakht ◽  
Mohammad Reza Shayegan ◽  
Sina Kianoush ◽  
Fatemeh Omid ◽  
...  

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