In this article we present a new approach to compute an approximate least common multiple (LCM) and an approximate greatest common divisor (GCD) of two multivariate polynomials. This approach uses the geometrical notion of principal angles whereas the main computational tools are the Implicitly Restarted Arnoldi Method and sparse QR decomposition. Upper and lower bounds are derived for the larg...

Lost circulation is one of the most significant contributors to wellbore instability and causes an increase in drilling operation costs. It also a major contributor nonproductive time must be minimized for improved economic operational performance. The objective this research provide tools information about specific loss management techniques that drillers can use minimize lost circulation. Thi...

Abstract. Precipitation is a crucial component of the global water cycle. Rainfall features (e.g., strength or frequency) strongly affect societal activities and are closely associated with functioning terrestrial ecosystems. Hence, predicting gridded precipitation under different emission scenarios an essential output climate change research, enabling better understanding future interactions b...

Nicotinamide adenine dinucleotide (NAD(+)) is a coenzyme for hydride transfer reactions and a substrate for sirtuins and other NAD(+)-consuming enzymes. The abundance of NAD (+), NAD(+) biosynthetic intermediates, and related nucleotides reflects the metabolic state of cells and tissues. High performance liquid chromatography (HPLC) followed by ultraviolet-visible (UV-Vis) spectroscopic analysi...

The ability to verify the sequence of a nucleic acid-based therapeutic is an essential step in the drug development process. The challenge associated with sequence identification increases with the length and nuclease resistance of the nucleic acid molecule, the latter being an important attribute of therapeutic oligonucleotides. We describe methods for the sequence determination of Spiegelmers...

Pharmaceuticals and personal care products (PPCPs) are generally neither totally removed by sewage treatment nor completely destroyed in the environment. Metformin (MET) triclosan (TRI) two compounds PPCPs that have potential to be environmental pollutants. This research aimed determine MET TRI sludge using a liquid chromatograph-mass spectrometer (LCMS-8040) extraction method. The Milli-Q wate...

Phytochemical investigation of the dichloromethane crude extract from bark Ochreinauclea maingayi with aid LCMS/MS-based molecular networking guided isolation and accelerated elucidation known new indole alkaloids. The analysis produces two main clusters, along 41 non-prioritized clusters self-loop nodes. Each cluster has several nodes which depict fractions contained within those An implementa...