scholarly journals Synthesis and color properties of novel polymeric dyes based on grafting of anthraquinone derivatives onto O-carboxymethyl chitosan

RSC Advances ◽  
2017 ◽  
Vol 7 (53) ◽  
pp. 33494-33501 ◽  
Author(s):  
Dongjun Lv ◽  
Jin Cui ◽  
Yufang Wang ◽  
Guohua Zhu ◽  
Mingjie Zhang ◽  
...  
Keyword(s):  
Carboxymethyl Chitosan ◽  
Color Properties ◽  
Anthraquinone Derivatives ◽  
Polymeric Dyes

Blue and red polymeric dyes were prepared by grafting anthraquinone derivatives onto O-carboxymethyl chitosan.

Carboxymethyl-hexanoyl Chitosan Nanodroplets for Ultrasonic Imaging and Drug Delivery to Tumor

2018 ◽  
Vol 24 (15) ◽  
pp. 1682-1688 ◽  
Author(s):  
Yu Jinsui ◽  
Situ Bing ◽  
Luo Muhua ◽  
Li Yue ◽  
Liao Jianyi ◽  
...  
Keyword(s):  
Ultrasound Imaging ◽  
Tumor Therapy ◽  
Carboxymethyl Chitosan ◽  
Great Promise ◽  
Ovarian Cancer Cells ◽  
Mechanical Index ◽  
Surface Charges ◽  
Particle Structure ◽  
Drug Release Profile ◽  
Hexanoyl Chitosan

Introduction: Although a great many strategies have been proposed for tumor-targeted chemotherapy, current delivery methods of anticancer drugs present limited success with inevitable systemic toxicity. The aim of this study was to develop a new kind of theranostic carrier for targeted tumor therapy. Methods: Prior to prepare CHC-PFP-DOX, carboxymethyl-hexanoyl chitosan (CHC) was synthesized by acylation of carboxymethyl chitosan. To develop CHC-PFP, perfluoropentane (PFP), an ultrasound gas precursor, was simultaneously encapsulated into the hydrophobic inner cores of pre-formulated CHC micelle in aqueous phase via using the oil in water (O/W) emulsion method. The size distribution and surface charges of these nanodroplets were measured and the morphology was observed by transmission electron microscopy (TEM). For ultrasound imaging application, in vitro model was established to evaluate the imaging of CHC-PFP-DOX under different concentration and mechanical index. After that, the anti-tumor effect of ultrasound combined with CHC-PFPDOX on ovarian cancer cells was investigated. Results: The resulting CHC-PFP-DOX had a nano-sized particle structure, with hydrophobic anticancer DOX/PFP inner cores and a hydrophilic carboxymethyl chitosan polymer outer shell. The favorable nano-scaled size offers the potential to extravagate from veins and accumulate in tumor tissues via enhanced permeation and retention (EPR) effect. Additionally, CHC-PFP-DOX showed the ability to serve as ultrasound imaging agent at body temperature. Notably, it exhibited an ultrasound-triggered drug release profile through the external ultrasound irradiation. Further study demonstrated that ultrasound combined with CHC-PFP-DOX can improve the killing effect of chemotherapy for tumor. Conclusion: CHC-PFP-DOX holds great promise in simultaneous cancer-targeting ultrasound imaging and ultrasound- mediated delivery for cancer chemotherapy.

Anti HIV-1 Agents 7. Discovery of 1-Hydroxy-4-chloro-9,10-anthraquinone Derivatives as New HIV-1 Inhibitors in Vitro

2011 ◽  
Vol 8 (7) ◽  
pp. 602-605
Author(s):  
Ning Huang ◽  
Qin Wang ◽  
Liu-Meng Yang ◽  
Hui Xu ◽  
Yong-Tang Zheng
Keyword(s):  
Anthraquinone Derivatives ◽  
Anti Hiv ◽  
Hiv 1

Preparation, Characterization and Antibacterial Activity of Quaternized Carboxymethyl Chitosan/Organic Rectorite Nanocomposites

2013 ◽  
Vol 9 (2) ◽  
pp. 278-282 ◽  
Author(s):  
Xiaoyun Li ◽  
Yang Han ◽  
Haoquan Zhong ◽  
Weijie Ye ◽  
Bo Liu ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Carboxymethyl Chitosan

Smart flame retardant coating containing carboxymethyl chitosan nanoparticles decorated graphene for obtaining multifunctional textiles

Cellulose ◽  
2021 ◽  
Author(s):  
Emad S. Goda ◽  
Mahmoud H. Abu Elella ◽  
Sang Eun Hong ◽  
Bidhan Pandit ◽  
Kuk Ro Yoon ◽  
...  
Keyword(s):  
Flame Retardant ◽  
Chitosan Nanoparticles ◽  
Carboxymethyl Chitosan

scholarly journals Clarification Processes of Orange Prickly Pear Juice (Opuntia spp.) by Microfiltration

Membranes ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 354
Author(s):  
Jaime A. Arboleda Mejia ◽  
Jorge Yáñez-Fernandez
Keyword(s):  
Suspended Solids ◽  
Cross Flow ◽  
Laboratory Scale ◽  
Prickly Pear ◽  
Permeate Flux ◽  
Color Properties ◽  
Pear Juice ◽  
Opuntia Spp

In this study, fresh orange prickly pear juice (Opuntia spp.) was clarified by a cross-flow microfiltration (MF) process on a laboratory scale. The viability of the process—in terms of productivity (permeate flux of 77.80 L/h) and the rejection of selected membranes towards specific compounds—was analyzed. The quality of the clarified juice was also analyzed for total antioxidants (TEAC), betalains content (mg/100 g wet base), turbidity (NTU) and colorimetry parameters (L, a*, b*, Croma and H). The MF process permitted an excellent level of clarification, reducing the suspended solids and turbidity of the fresh juice. In the clarified juice, a decrease in total antioxidants (2.03 TEAC) and betalains content (4.54 mg/100 g wet basis) was observed as compared to the fresh juice. Furthermore, there were significant changes in color properties due to the effects of the L, a*, b*, C and h° values after removal of turbidity of the juice. The turbidity also decreased (from 164.33 to 0.37 NTU).

Bifunctional scaffolds of hydroxyapatite/poly(dopamine)/carboxymethyl chitosan with osteogenesis and anti-osteosarcoma effect

2021 ◽  
Author(s):  
Mengyu Yao ◽  
Qingxia Zou ◽  
Wenwu Zou ◽  
Zhenze Xie ◽  
Zhihao Li ◽  
...  
Keyword(s):  
Bone Tumor ◽  
Tumor Therapy ◽  
Carboxymethyl Chitosan

Bifunctional scaffolds prepared by hydroxyapatite/poly(dopamine)/carboxymethyl chitosan with good osteogenesis and anti-osteosarcoma effect is promising for bone tumor therapy.

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