Results 11 to 20 of about 5,709 (218)

Investigation of J-Aggregates of 2,3,7,8,12,13,17,18-Octabromo-5,10,15,20-tetrakis(4-sulfonatophenyl) Porphyrin in Aqueous Solutions

open access: yesNanomaterials, 2023
The highly distorted water-soluble 2,3,7,8,12,13,17,18-octabromo-5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrin (Br8TPPS44−) is readily protonated under acidic pH, forming the diacid H2Br8TPPS42− and subsequently the zwitterionic H4Br8TPPS4, which ...
Balkis Abdelaziz   +7 more
doaj   +1 more source

Analysis of Organic Sulphur Compounds in Coal Tar by Using Comprehensive Two-Dimensional Gas Chromatography-High Resolution Time-of-Flight Mass Spectrometry

open access: yesSeparations, 2020
Coal tar is a complex mixture of organic compounds obtained from the thermal treatment of coal; it contains several different chemical classes of compounds, such as polycyclic aromatic hydrocarbons, phenols and different heterocyclic compounds including ...
Ivan Aloisi   +3 more
doaj   +1 more source

A Computational Quantum-Based Perspective on the Molecular Origins of Life’s Building Blocks

open access: yesEntropy, 2022
The search for the chemical origins of life represents a long-standing and continuously debated enigma. Despite its exceptional complexity, in the last decades the field has experienced a revival, also owing to the exponential growth of the computing ...
Gabriele Amante   +4 more
doaj   +1 more source

Incidence of Phage Capsid Organization on the Resistance to High Energy Proton Beams

open access: yesApplied Sciences, 2022
The helical geometry of virus capsid allows simple self-assembly of identical protein subunits with a low request of free energy and a similar spiral path to virus nucleic acid.
Laura Maria De Plano   +11 more
doaj   +1 more source

A green and sustainable method for Capsicum volatilome investigation by means of headspace solid-phase microextraction combined with flow-modulated two-dimensional gas chromatography-mass spectrometry using hydrogen as carrier gas

open access: yesGreen Analytical Chemistry, 2023
The present research is focused on the development of a green and sustainable analytical method, based on the use of headspace solid-phase microextraction (HS SPME), and hydrogen as carrier gas, within the context of fast flow-modulation comprehensive ...
Micaela Galletta   +4 more
doaj   +1 more source

Pore Structure and Water Transfer in Pietra d’Aspra Limestone: A Neutronographic Study

open access: yesApplied Sciences, 2020
Neutron radiography (NR) was here applied to study the effects of two different commercially available consolidants on the water absorption properties in a particular type of limestone (biocalcarenite), known as Pietra d’Aspra stone, which is one of the ...
Luciana Randazzo   +9 more
doaj   +1 more source

Geological and Structural Framework, Inventory, and Quantitative Assessment of Geodiversity: The Case Study of the Lake Faro and Lake Ganzirri Global Geosites (Italy)

open access: yesGeosciences
The geoconservation policies assumed by the Sicilian Region (Italy) induced to classify as geosites all the geodiversity preserved in the Sicilian natural reserves.
Roberta Somma   +2 more
doaj   +1 more source

Thermophilic Hydrocarbon-Utilizing Bacilli from Marine Shallow Hydrothermal Vents as Producers of Biosurfactants

open access: yesJournal of Marine Science and Engineering, 2022
The exploitation of thermophilic hydrocarbon-utilizing bacilli could provide novel environmentally friendly surfactants. In this work, 80 thermophilic bacilli isolated from shallow hydrothermal vents of the Eolian Islands (Italy) were screened for their ...
Vincenzo Zammuto   +7 more
doaj   +1 more source

Geological and Ecological Insights on the Lake Faro Global Geosite Within the Messina Strait Framework (Italy)

open access: yesGeosciences
The Lake Faro brackish basin (Sicily, Italy) was established as a Global Geosite as a key locality of tectonic coastal lakes, but little research has been devoted to this rare geological and ecological framework.
Roberta Somma   +5 more
doaj   +1 more source

Elemental distribution and source analysis of atmospheric aerosols from Meycauayan, Bulacan, Philippines

open access: yesHeliyon, 2023
One of the industrialized cities in the Philippines is Meycauayan, Bulacan. This study reports the elemental distribution and source apportionment in eight varying land cover-land use type sampling points located along the Marilao-Meycauayan- Obando ...
Jumar Cadondon   +10 more
doaj   +1 more source

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