Results 61 to 70 of about 813,308 (361)

A Simple, Quick, and Precise Procedure for the Determination of Water in Organic Solvents [PDF]

, 1990
A procedure for the UV/VIS-spectroscopic determination of water by the use of a solvatochromic pyridiniumphenolate betaine is given. The water content of organic solvents is calculated by a two parameter equation from λmax of the dye.
Dimroth K., H. Langhals, Johnson B. P., Langhals H., Reichardt C., Reichardt C., Riddick J. A., Schmutz J. F., Spencer H., Ziessow D.   +9 more
core   +1 more source

Molecular bases of circadian magnesium rhythms across eukaryotes

FEBS Letters, EarlyView.
Circadian rhythms in intracellular [Mg2+] exist across eukaryotic kingdoms. Central roles for Mg2+ in metabolism suggest that Mg2+ rhythms could regulate daily cellular energy and metabolism. In this Perspective paper, we propose that ancestral prokaryotic transport proteins could be responsible for mediating Mg2+ rhythms and posit a feedback model ...
Helen K. Feord, Gerben van Ooijen
wiley   +1 more source

A Systematic Method for Integrating Reactor and Extractive Distillation Considering the Variation of Reactor Parameters

Chemical Engineering Transactions, 2019
A systematic method is proposed to integrate reactor and extractive distillation, and identify the optimal solvent, solvent to feed ratio and extractive distillation sequence.
Changfang Yin, Donghui Lv, Guilian Liu
doaj   +1 more source

The Effects of Solvents and Solid-to-Solvent Ratios on Ultrasound-Assisted Extraction of Carotenoids from Chlorella vulgaris

International Journal of Technology, 2020
Research around using algae as a natural source of carotenoids has been intense in the 21st century, given the wide applications of carotenoids in the pharmaceutical, health, and food industries.
Dianursanti, Aisyah Siregar, Yoshiaki Maeda, Tomoko Yoshino, Tsuyoshi Tanaka   +4 more
doaj   +1 more source

Transient Rayleigh-Benard-Marangoni Convection due to Evaporation : a Linear Non-normal Stability Analysis [PDF]

, 2009
The convective instability in a plane liquid layer with time-dependent temperature profile is investigated by means of a general method suitable for linear stability analysis of an unsteady basic flow.
B. GUERRIER, Chandrasekhar, F. DOUMENC, M. ROSSI, Nepomnyashchy, T. BOECK   +5 more
core   +2 more sources

Peptide‐based ligand antagonists block a Vibrio cholerae adhesin

FEBS Letters, EarlyView.
The structure of a peptide‐binding domain of the Vibrio cholerae adhesin FrhA was solved by X‐ray crystallography, revealing how the inhibitory peptide AGYTD binds tightly at its Ca2+‐coordinated pocket. Structure‐guided design incorporating D‐amino acids enhanced binding affinity, providing a foundation for developing anti‐adhesion therapeutics ...
Mingyu Wang, Grace Du, Charity Yongo‐Luwawa, Angelina Lu, Brett Kinrade, Kim Munro, Karl E. Klose, William D. Lubell, Peter Davies, Shuaiqi Guo   +9 more
wiley   +1 more source

EXTRACTION OF STRONTIUM(II) BY CROWN ETHER: INSIGHTS FROM DENSITY FUNCTIONAL CALCULATION

Indonesian Journal of Chemistry, 2012
The structures, energetic and thermodynamic parameters of crown ethers with different cavity size, electron donating/withdrawing substituent groups and donor atoms have been determined with density functional method at B3LYP level of theory in gas and ...
Saprizal Hadisaputra, Harno Dwi Pranowo, Ria Armunanto   +2 more
doaj   +1 more source

Structural fluctuations and quantum transport through DNA molecular wires: a combined molecular dynamics and model Hamiltonian approach

, 2009
Charge transport through a short DNA oligomer (Dickerson dodecamer) in presence of structural fluctuations is investigated using a hybrid computational methodology based on a combination of quantum mechanical electronic structure calculations and ...
, , , Felice R D, G Cuniberti, Haken H, M Elstner, Mahan G D, P B Woiczikowski, Porath D, R Caetano, R Gutiérrez, T Kubar, Weiss U   +13 more
core   +1 more source

Disordered but rhythmic—the role of intrinsic protein disorder in eukaryotic circadian timing

FEBS Letters, EarlyView.
Unstructured domains known as intrinsically disordered regions (IDRs) are present in nearly every part of the eukaryotic core circadian oscillator. IDRs enable many diverse inter‐ and intramolecular interactions that support clock function. IDR conformations are highly tunable by post‐translational modifications and environmental conditions, which ...
Emery T. Usher, Jacqueline F. Pelham
wiley   +1 more source

Modification of RDX and HMX crystals in procedure of solvent/anti-solvent by statistical methods of Taguchi analysis design and MLR technique

Defence Technology, 2018
Many of the physical and functional properties of RDX and HMX explosives are related to the crystalline structure of these materials. Crystalline defects affect the quality of the explosives. Therefore, in order to enhance the quality of these materials,
Hamid Reza Pouretedal, Sajjad Damiri, Abolfazl Shahsavan   +2 more
doaj   +1 more source