scholarly journals Chronicle of Nanocelluloses (NCs) for Catalytic Applications: Key Advances

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 96
Author(s):  
Loredana Maiuolo ◽  
Vincenzo Algieri ◽  
Fabrizio Olivito ◽  
Matteo Antonio Tallarida ◽  
Paola Costanzo ◽  
...  
Keyword(s):  
Organic Synthesis ◽  
Medical Devices ◽  
Current Knowledge ◽  
Cellulose Nanofibers ◽  
Chemical Transformations ◽  
Bacterial Nanocellulose ◽  
Catalytic Applications ◽  
Sustainable Materials ◽  
The Many ◽  
Chemical Groups

Nanocellulose (NC) is a biomaterial with growing interest in the field of nanocomposites and sustainable materials. NC has various applications including biodegradable materials, reinforcing agents, packaging films, transpiring membranes and medical devices. Among the many applications, the use of NC functionalized with organic and inorganic groups has found wide use as a catalyst in chemical transformations. The goal of this review is to collect the current knowledge on its catalytic applications for chemical groups conversion. We have chosen to organize the manuscript according to subdivision of NC into Bacterial Nanocellulose (BNC), Cellulose Nanocrystals (CNCs), and Cellulose Nanofibers (CNFs) and their role as inorganic- and organic-functionalized NC-catalysts in organic synthesis. However, in consideration of the fact that the literature on this field is very extensive, we have decided to focus our attention on the scientific productions of the last five years.

Heracles and epilepsy: the sacred disease

2020 ◽  
Vol 78 (10) ◽  
pp. 660-662
Author(s):  
Eduardo ORREGO-GONZÁLEZ ◽  
Ana PERALTA-GARCÍA ◽  
Leonardo PALACIOS-SÁNCHEZ
Keyword(s):  
Current Knowledge ◽  
Greek Mythology ◽  
Corpus Hippocraticum ◽  
Ancient Times ◽  
The Many

ABSTRACT Epilepsy is one of the most dreaded and terrifying human afflictions. One of the many names it has received was Sacred Disease, during Greek times. Heracles served as a source of the divine connotation that epilepsy received in ancient times, as he was one of the most important demigods in Greek mythology. However, several authors have attributed Heracles’ actions to a seizure, including Hippocrates, who described the sacred disease on his “Corpus Hippocraticum.” This paper reviewed some of the publications on the myth and content of the text of Hippocrates, in relation to the current knowledge of the disease.

ChemInform Abstract: Catalytic Applications of Transition Metals in Organic Synthesis

ChemInform ◽  
2010 ◽  
Vol 27 (49) ◽  
pp. no-no
Author(s):  
G. J. DAWSON ◽  
J. F. BOWER ◽  
J. M. J. WILLIAMS
Keyword(s):  
Transition Metals ◽  
Organic Synthesis ◽  
Catalytic Applications

Sēra dioksīda fizikāli ķīmisko īpašību pielietojums jaunu organiskās sintēzes metožu izstrādē / Development of New Organic Synthesis Methods Based on Physico-Chemical Properties of Sulfur Dioxide

2021 ◽  
Author(s):  
◽  
Krista Gulbe
Keyword(s):  
Organic Synthesis ◽  
Chemical Properties ◽  
Coupling Reaction ◽  
Synthetic Methods ◽  
Synthesis Methods ◽  
Chemical Transformations ◽  
Scientific Publications ◽  
Cross Coupling Reaction ◽  
Aryl Acetylenes ◽  
The Republic

The Doctoral Thesis has been prepared as a collection of thematically related scientific publications comprising five publications in the SCI journals, one patent of the Republic of Latvia, and one application for patent of the Republic of Latvia. We have carried out fundamental research on the applications of SO2 as a solvent and reagent in organic synthesis. We have developed several novel synthetic methods that represent the use of liquid SO2 as a solvent for chemical transformations that proceed via carbenium ion intermediates: a) hydration of aryl acetylenes; b) hydrohalogenation of aryl acetylenes; c) ring opening of methylenecyclopropanes with halides; d) glycosylation with glycosyl fluorides. By employing DABSO as an SO2 surrogate, we have also discovered the catalytic activity of Ru(II) complexes towards sulfonylative cross coupling reaction. This finding has been applied for the synthesis of sulfonyl derived compounds.

A quantitative speciation model for the adsorption of organic pollutants on activated carbon

2013 ◽  
Vol 68 (6) ◽  
pp. 1370-1376 ◽  
Author(s):  
M. Grivé ◽  
D. García ◽  
C. Domènech ◽  
L. Richard ◽  
I. Rojo ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Organic Pollutants ◽  
Current Knowledge ◽  
Quantitative Description ◽  
High Capacity ◽  
Chemical Properties ◽  
Quantitative Model ◽  
Surface Groups ◽  
Potentiometric Titrations ◽  
Chemical Groups

Granular activated carbon (GAC) is commonly used as adsorbent in water treatment plants given its high capacity for retaining organic pollutants in aqueous phase. The current knowledge on GAC behaviour is essentially empirical, and no quantitative description of the chemical relationships between GAC surface groups and pollutants has been proposed. In this paper, we describe a quantitative model for the adsorption of atrazine onto GAC surface. The model is based on results of potentiometric titrations and three types of adsorption experiments which have been carried out in order to determine the nature and distribution of the functional groups on the GAC surface, and evaluate the adsorption characteristics of GAC towards atrazine. Potentiometric titrations have indicated the existence of at least two different families of chemical groups on the GAC surface, including phenolic- and benzoic-type surface groups. Adsorption experiments with atrazine have been satisfactorily modelled with the geochemical code PhreeqC, assuming that atrazine is sorbed onto the GAC surface in equilibrium (log Ks = 5.1 ± 0.5). Independent thermodynamic calculations suggest a possible adsorption of atrazine on a benzoic derivative. The present work opens a new approach for improving the adsorption capabilities of GAC towards organic pollutants by modifying its chemical properties.

scholarly journals The Many Facets of CD38 in Lymphoma: From Tumor–Microenvironment Cell Interactions to Acquired Resistance to Immunotherapy

Cells ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 802 ◽  
Author(s):  
Eleonora Calabretta ◽  
Carmelo Carlo-Stella
Keyword(s):  
Tumor Microenvironment ◽  
Current Knowledge ◽  
Checkpoint Inhibitors ◽  
Acquired Resistance ◽  
Prognostic Significance ◽  
Lymphocytic Leukemia ◽  
Lymphoid Malignancies ◽  
Non Hodgkin Lymphoma ◽  
Cd38 Expression ◽  
The Many

The CD38 antigen is expressed in several hematological malignancies, and the anti-CD38 monoclonal antibodies Daratumumab and Isatuximab have an established role in the therapy of multiple myeloma. However, data on the therapeutic utility of CD38 targeting in other lymphoid malignancies are limited. In chronic lymphocytic leukemia, the prognostic significance of CD38 expression is well accepted, and preclinical studies on the use of Daratumumab in monotherapy or combination therapy have demonstrated considerable efficacy. In other lymphoproliferative disorders, preclinical and clinical data have not been as compelling; however, CD38 overexpression likely contributes to resistance to checkpoint inhibitors, prompting numerous clinical trials in Hodgkin and non-Hodgkin lymphoma to investigate whether blocking CD38 enhances the efficacy of checkpoint inhibitors. Furthermore, due to its widespread expression in hematological tumors, CD38 represents an attractive target for cellular therapies such as CAR-T cells. The present review discusses current knowledge of CD38 expression and its implications in various lymphoid malignancies. Furthermore, it addresses current and future therapeutic perspectives, with a particular emphasis on the significance of CD38 interaction with immune cells of the tumor microenvironment. Lastly, results of ongoing studies using anti-CD38 antibodies will be reviewed.

scholarly journals Catalytic Applications of CeO2-Based Materials

Catalysts ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 576
Author(s):  
Antonio Vita
Keyword(s):  
Metal Oxides ◽  
Energy Conversion ◽  
Environmental Applications ◽  
Chemical Transformations ◽  
Energy Conversion Systems ◽  
Catalytic Applications

Among the metal-oxides, ceria represents one of the most promising materials for chemical transformations mainly for environmental applications and energy conversion systems [...]

ChemInform Abstract: Catalytic Applications of Transition Metals in Organic Synthesis

ChemInform ◽  
2001 ◽  
Vol 32 (8) ◽  
pp. no-no
Author(s):  
Louise Haughton ◽  
Jonathan M. J. Williams
Keyword(s):  
Transition Metals ◽  
Organic Synthesis ◽  
Catalytic Applications

Ethenesulfonyl Fluoride (ESF) and Its Derivatives in SuFEx Click Chemistry and More

Synthesis ◽  
2019 ◽  
Vol 52 (05) ◽  
pp. 673-687 ◽  
Author(s):  
Yan-Ping Meng ◽  
Shi-Meng Wang ◽  
Wan-Yin Fang ◽  
Zhi-Zhong Xie ◽  
Jing Leng ◽  
...  
Keyword(s):  
Organic Chemistry ◽  
Click Chemistry ◽  
Exchange Reaction ◽  
Organic Synthesis ◽  
Medicinal Chemistry ◽  
Materials Science ◽  
Click Reaction ◽  
Chemical Properties ◽  
Chemical Transformations ◽  
Absolute Reliability

The sulfur(VI) fluoride exchange reaction (SuFEx), developed by Sharpless and co-workers in 2014, is a new category of click reaction that creates molecular connections with absolute reliability and unprecedented efficiency through a sulfur(VI) hub. Ethenesulfonyl fluoride (ESF), as one of the most important sulfur(VI) hubs, exhibits extraordinary reactivity in SuFEx click chemistry and organic synthesis. This review summarizes the chemical properties and applications of ESF in click chemistry, organic chemistry, materials science, medicinal chemistry and in many other fields related to organic synthesis.1 Introduction2 Chemical Transformations of ESF3 Chemical Transformations of 2-Arylethenesulfonyl Fluorides4 Novel SuFEx Reagents Derived from ESF5 Applications of ESF Derivatives in Medicinal Chemistry6 Applications of ESF Derivatives in Materials Science7 Conclusion

Sign in / Sign up

Export Citation Format

Share Document