Results 31 to 40 of about 555,071 (331)
Poly(amido amine)s as Gene Delivery Vectors: Effects of Quaternary Nicotinamide Moieties in the Side Chains [PDF]
, 2008 To evaluate the effect of quaternary nicotinamide pendant groups on gene delivery properties, a series of poly(amido amine) (co)polymers were synthesized by Michael addition polymerization of N, N-cystaminebisacrylamide with variable ratios of 1-(4 ...
Engbersen, Johan F.J. +4 more
core +7 more sources
Plant speciation in the Quaternary
Plant Ecology & Diversity, 2021 Background There are conflicting views between palaeobotanists and plant systematists/evolutionary biologists regarding the occurrence of plant speciation in the Quaternary.
J. Kadereit, R. Abbott
semanticscholar +1 more source
The configuration of Northern Hemisphere ice sheets through the Quaternary
Nature Communications, 2019 Our understanding of how global climatic changes are translated into ice-sheet fluctuations and sea-level change is currently limited by a lack of knowledge of the configuration of ice sheets prior to the Last Glacial Maximum (LGM).
C. Batchelor +8 more
semanticscholar +1 more source
Biological Activity of Quaternary Ammonium Salts and Their Derivatives
Pathogens, 2020 Besides their positive role, microorganisms are related to a number of undesirable effects, including many diseases, biodeterioration and food spoilage, so when their presence is undesired, they must be controlled.
D. Kwaśniewska +2 more
semanticscholar +1 more source
Dizhi lixue xuebao, 2023 Quaternary volcanic rocks are widely distributed in the Leizhou Peninsula, but the age of volcanic formation remains controversial. This study used the high-precision laser stepwise heating 40Ar/39Ar method to date the age of volcanic samples from the ...
LI Xiang +4 more
doaj +1 more source
Biostratigraphic and magnetostratigraphic synthesis of the Celebes and Sulu Seas, Leg 124 [PDF]
, 1991 During ODP Leg 124, late middle Eocene to Quaternary sediment sequences were recovered from 13 holes drilled at five sites in the Celebes and Sulu basins. Paleomagnetic measurements and biostratigraphic studies using calcareous nannofossils, planktonic
Hsu, V. +7 more
core +1 more source
地质科技通报, 2021 The development of domestic high resolution remote sensing satellite technology provides a new means for the investigation of macroscopic, local and detailed characteristics of the Quaternary.Alluvial-diluvial fans, valley terraces, glacial deposits are ...
Zhijun Zhang +7 more
doaj +1 more source
Pore structure and physical properties of Quaternary weak diagenetic shales
Shiyou shiyan dizhi, 2022 The biogas of Quaternary weak diagenetic shale has a wide exploration prospect, and the understanding of pore structure and physical properties of these shales is conducive to promote the geological theory of shale biogas reservoir.
Xianglu TANG +6 more
doaj +1 more source