Results 31 to 40 of about 72,853 (343)

Advances in intranasal application of stem cells in the treatment of central nervous system diseases

Stem Cell Research & Therapy, 2021
Stem cells are characterized by their self-renewal and multipotency and have great potential in the therapy of various disorders. However, the blood–brain barrier (BBB) limits the application of stem cells in the therapy of neurological disorders ...
Yu-Ting Zhang, Kai-Jie He, Jin-Bao Zhang, Quan-Hong Ma, Fen Wang, Chun-Feng Liu   +5 more
doaj   +1 more source

Research progress on the mechanism of propofol in regulating autophagy [PDF]

Yixue xinzhi zazhi, 2023
Autophagy is a process in which intracellular lysosomes are involved in the degradation of damaged organelles or macromolecular substances. In the physiological state, eukaryotic cells maintain tissue homeostasis through a low degree of autophagy.
Xiao-Shuang ZHANG, Li-Li YANG, Ya-Ying XIE   +2 more
doaj   +1 more source

Structural ultrafast dynamics of macromolecules: diffraction of free DNA and effect of hydration [PDF]

, 2009
Of special interest in molecular biology is the study of structural and conformational changes which are free of the additional effects of the environment.
Lin, Milo M., Shorokhov, Dmitry, Zewail, Ahmed H.   +2 more
core   +1 more source

Chemical Modification of Polysaccharides: A Review of Synthetic Approaches, Biological Activity and the Structure–Activity Relationship

Molecules, 2023
Natural polysaccharides are macromolecular substances with great potential owing to their wide biological activity and low toxicity. However, not all polysaccharides have significant pharmacodynamic activity; hence, appropriate chemical modification ...
Tianbo Liu, Qianqian Ren, Shuang Wang, Jianing Gao, Congcong Shen, Shengyu Zhang, Yanhong Wang, Feng Guan   +7 more
doaj   +1 more source

Osmotic pressure: resisting or promoting DNA ejection from phage [PDF]

, 2008
Recent in vitro experiments have shown that DNA ejection from bacteriophage can be partially stopped by surrounding osmotic pressure when ejected DNA is digested by DNase I on the course of ejection.
Castelnovo, Martin, Evilevitch, Alex,, Jeembaeva, Meerim,, Larsson, Frida, Lund University.   +4 more
core   +3 more sources

Structural Modification and Biological Activity of Polysaccharides

Molecules, 2023
Natural polysaccharides are macromolecular substances with a wide range of biological activities. The structural modification of polysaccharides by chemical means can enhance their biological activity.
Ting Zhao, Min Yang, Lina Ma, Xinglong Liu, Qiteng Ding, Guodong Chai, Yang Lu, Hewei Wei, Shuai Zhang, Chuanbo Ding   +9 more
doaj   +1 more source

Structural changes in lipid-free humic acids during composting of sewage sludge [PDF]

, 2005
Structural changes in humic acids (HAs), extracted after lipid removal from sewage sludge during composting, were investigated using various chemical methods (elemental analysis, Fourier transform infrared spectroscopy and 13C-nuclear magnetic resonance
Amir, Soumia, Hafidi, Mohamed, Merlina, Georges, Revel, Jean-Claude   +3 more
core   +3 more sources

Gender differences in microcirculation: Observation using the hamster cheek pouch

Clinics, 2013
OBJECTIVES: Estrogen has been shown to play an important protective role in non-reproductive systems, such as the cardiovascular system. Our aim was to observe gender differences in vivo with regard to the increase in macromolecular permeability and ...
Diogo Guarnieri Panazzolo, Lucia Henriques Alves da Silva, Fatima Zely Garcia de Almeida Cyrino, Fernando Lencastre Sicuro, Luiz Guilherme Kraemer-Aguiar, Eliete Bouskela   +5 more
doaj   +1 more source

A model for predicting dissolved organic carbon distribution in a reservoir water using fluorescence spectroscopy [PDF]

, 2004
A number of water treatment works (WTW) in the north of England (UK) have experienced problems in reducing the dissolved organic carbon (DOC) present in the water to a sufficiently low level.
Banks, Jenny, Campbell, Andrew T., Goslan, Emma Harriet, Hillis, Peter, Parsons, Simon A., Voros, Sandrine, Wilson, Derek   +6 more
core   +3 more sources

Food Polysaccharides and Proteins: Processing, Characterization, and Health Benefits

Foods
Natural macromolecular substances are prevalent in the organs of plants and animals, such as polysaccharides, resins, proteins, etc [...]
Liyuan Rong, Mingyue Shen, Yanjun Zhang, Hansong Yu, Jianhua Xie   +4 more
doaj   +1 more source