Results 11 to 20 of about 9,516,581 (298)

Accessing natural product biosynthetic processes by mass spectrometry [PDF]

open access: yesCurrent Opinion in Chemical Biology, 2008
Two important classes of natural products are made by nonribosomal peptide synthetases (NRPSs) and polyketide synthases (PKSs). With most biosynthetic intermediates covalently tethered during biogenesis, protein mass spectrometry (MS) has proven invaluable for their interrogation.
Stefanie B, Bumpus, Neil L, Kelleher
openaire   +2 more sources

AL-‘ĀLAM DALAM ALQURAN: (Analisis tentang Ayat-ayat Penciptaan)

open access: yesHunafa: Jurnal Studia Islamika, 2012
One of the objects of the philosophy studies is the nature. The thought of the nature runs continually to the things beyond the nature (metaphysics) and eventually comes to a conclusion that the existence of the nature must be in process.
Muhammad Syarif Hasyim
doaj   +3 more sources

CO2 Capture by Using a Membrane-absorption Hybrid Process in the Nature Gas Combined Cycle Power Plants

open access: yesAerosol and Air Quality Research, 2020
This study’s main objective was to optimize the design parameters of the hybrid membrane-absorption CO2-capture process in natural gas steam cycle (NGCC) power plants. To calculate the CO2 concentration in the permeating gas and the required area for the
Wenfeng Dong   +4 more
doaj   +1 more source

Transformation of Forest Vegetation After 40 Years of Protection in the Tomczyce Nature Reserve (Central Poland) [PDF]

open access: yes, 2011
The Tomczyce nature reserve is characterized by a degenerated forest vegetation. We assume that the regeneration process was possible to launch after the establishment of the nature reserve in 1968.
Grzelak, Paulina   +2 more
core   +2 more sources

Stationarity of spot freight rates considering supply/demand effect

open access: yesJournal of Shipping and Trade, 2020
The mean-reverting nature of freight rates is one of the important subjects in maritime economics. The classic understanding of maritime economics (and that of the shipping industry) suggests that freight rate processes are mean-reverting and approach ...
Koichiro Hayashi
doaj   +1 more source

Is attending a mental process? [PDF]

open access: yes, 2019
The nature of attention has been the topic of a lively research programme in psychology for over a century. But there is widespread agreement that none of the theories on offer manage to fully capture the nature of attention.
Aune B.   +8 more
core   +1 more source

Two Conceptions of Second Nature

open access: yesOpen Philosophy, 2020
The concept of second nature promises to provide an explanation of how nature and reason can be reconciled. But the concept is laden with ambiguity. On the one hand, second nature is understood as that which binds together all cognitive activities.
Bertram Georg W.
doaj   +1 more source

Wpływ nowożytnego antropocentryzmu na relację człowieka do przyrody. Część pierwsza

open access: yesStudia Ecologiae et Bioethicae, 2011
Anthropocentrism seems to be a fundamental notion concerning the man-nature relation. The anthropocentric attitude is largely meant to be the main cause of the ecological crisis.
Anita Ganowicz-Bączyk
doaj   +1 more source

Establishment of nature reserves in administrative regions of mainland China. [PDF]

open access: yesPLoS ONE, 2015
Nature reserves are widely considered as one available strategy for protecting biodiversity, which is threatened by habitat fragmentation, and wildlife extinction.
Ziliang Guo, Guofa Cui
doaj   +1 more source

The Effect of Argumentation-Based Organic Chemistry Teaching on Students’ Argument Construction Skills

open access: yesInternational Journal of Contemporary Educational Research, 2022
Some students could not learn organic chemistry because of the difficulty of its submicroscopic nature. In this study, it was aimed to determine the effect of argumentation-based organic chemistry teaching on high school students’ argument construction ...
Ümmüye Nur Tüzün   +2 more
doaj   +1 more source

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