Melting point

The melting points of the complexes were >350oC, indicating high thermal stability. Cu-Zn-containing complex showed the least binding energy against the three proteins. The bioactivity scores of the complexes were between -0.50 and 0.0. Against A549 Cu-Zn, Co-Zn and Fe-Zn containing complexes showed potential activity. Against MCF-7, Fe-Cu containing complex had IC50 of 53.5 whereas Co-Zn containing complex was active against HepG2. Three complexes were active against S. aureus in the tested range.

18p dianmotminh02 03-05-2024 2 1   Download

To prepare the efficiently flame retardants (FR) for the highly flammable polymers, the novel nitrogen-phosphorus based FRs (P-N FR) (PN-3, PN-4, PN-5, and PN-6) were prepared via phosphorus halides and amine derivatives with 40- 90 % in yields. The appearance of P-N FRs are lightly white solid. All P-N FRs are water-insoluble and show a melting point above 40oC. The success of the synthesis was confirmed by NMR analysis.

8p dianmotminh02 03-05-2024 2 2   Download

Ebook "Ionic liquids for better separation processes" discusses capital separation processes of industrial interest and explores the potential for substantial improvement offered by a promising class of substances: ionic liquids. These low melting point salts, with their unique characteristics, have been gaining relevance in the field of separation through a variety of approaches.

235p tracanhphuonghoa1007 22-04-2024 5 3   Download

Ebook "Polymer synthesis: Theory and practice - Fundamentals, methods, experiments" contains numerous changes: In recent years, so-called functional polymers which have special electrical, electronic, optical and biological properties, have gained more and more in interest. This textbook was therefore supplemented by recipes which describe the synthesis of these materials in a new chapter "Functional polymers". Together with new experiments in chapter 3, 4 and 5 the book now contains more than 120 recipes that describe a wide range of macromolecules.

428p coduathanh1122 27-03-2024 4 1   Download

Part 1 book "The organic chem lab survival manual - A student’s guide to techniques" includes content: Safety first, last, and always; keeping a notebook; interpreting a handbook; jointware; microscale jointware; other interesting equipment; pipet tips; syringes, needles, and septa; clean and dry; drying agents; on products; the melting point experiment; recrystallization; recrystallization - microscale; extraction and washing; extraction and washing - microscale; sources of heat.

169p muasambanhan07 08-02-2024 2 0   Download

In ebook "Scaling concepts in polymer physics" a noted physicist explains the radical changes that have taken place in this exciting and rapidly developing field.Pierre-Gilles de Gennes points out the three developments that have been essential for recent advances in the study of large-scale conformations and motions of flexible polymers in solutions and melts.

324p loivantrinh 29-10-2023 5 3   Download

Ebook "The mesoscopic theory of polymer dynamics" presented in this book explains in a consistent manner all dynamic effects (diffusion, neutron scattering, viscoelasticity, optical birefringence) observed in very concentrated solutions and melts of linear polymers from a macromolecular point of view. This monograph reconciles different approaches to polymer dynamics and reflects the modern situation in understanding the relaxation behaviour of the polymer systems.

266p loivantrinh 29-10-2023 5 2   Download

Part 1 of ebook "Polymer synthesis: Theory and practice - Fundamentals, methods, experiments" provides readers with contents including: introduction; methods and techniques for synthesis, characterization, processing, and modification of polymers; correlations of structure and morphology with the properties of polymers;...

176p dangsovu 20-10-2023 5 3   Download

Part 1 of ebook "Food chemistry (4th revised and extended edition)" provides readers with contents including: water; phase transition of foods containing water; amino acids, peptides, proteins; carbamoyl and thiocarbamoyl derivatives; mutagenic heterocyclic compounds ; enzymes; lipids; crystalline structure, melting points; carbohydrates; chemical reactions and derivatives; aroma compounds; aroma extract dilution analysis; vitamins; minerals; food additives;...

510p lytamnguyet 04-08-2023 4 3   Download

The coexistence of the transverse and fast sounds of liquid metals in the terahertz range near the melting point is explained. These sound modes are phonon polaritons arisen from the interaction between the transverse collective ionic oscillations, known as phonons, and the electromagnetic wave radiated by the ions in vibration at high enough frequencies, for instance, in liquid Zn, Cu, and Fe.

7p viberkshire 09-08-2023 4 3   Download

The heating process of zigzag silicon carbide nanoribbon (SiCNR) is studied via molecular dynamics (MD) simulation. The initial model contained 10000 atoms is heating from 50 K to 5000 K to study the structural evolution of zigzag SiCNR.

12p vispiderman 15-06-2023 8 3   Download

The aim of this thesis was to investigate and characterise the effect on electron dosimetry that localising different forms of bolus, both approximately tissue equivalent and non tissue equivalent, in a non conventional, although reproducible locations, (ie not on the phantom surface). A series of experiments were derived to compare the differences in beam characteristics between the recognised conventional method of locating bolus on the surface to that of bolus supported by the Low Melting point Attenuator (LMA) Electron insert.

238p runthenight07 01-03-2023 3 3   Download

In this study poly (4-nitrophenylazo-3-aminopyridine - formaldehyde) (PNAAP-F) and poly (4-nitroarylazo-3-chloro-6- hydroxypyridine - formaldehyde) (NAACHP-F) were synthesized via diazotization, coupling and polycondensation reactions. The structural properties of the as-synthesized dyes were acquired using Fourier-transform infrared spectroscopy (FTIR) and UV-visible absorption maxima and their color, yield, melting point, solubility, and viscosity were determined via standard methods.

12p lyhuyenthu 31-01-2023 2 2   Download

There is a long-standing and growing interest in Molten Salt Reactors (MSRs) mainly because of their potential advantages in terms of safety, sustainable fuel cycle, and the high melting and boiling points of salt which allow operations at high temperatures and atmospheric pressure with potential merits in terms of cost

12p vironald 15-12-2022 15 5   Download

Biphenyl phthalonitrile (BPh) resins with good thermal and thermo-oxidative stability demonstrate great application potential in aerospace and national defense industries. However, BPh monomer has a high melting point, poor solubility, slow curing speed and high curing temperature. It is difficult to control the polymerization process to obtain the resins with high performance.

15p vironald 15-12-2022 5 2   Download

This paper presents a numerical investigation into the solidification process in an annulus that is placed horizontally. The method used is a front-tracking method combined with a linear interpolation technique. The inner wall of the annulus is held at cold temperature, which is lower than the melting point of the liquid, while its outer wall is insulated during solidification.

4p vispyker 16-11-2022 5 1   Download

A very efficient ligand-free method was developed for the transfer hydrogenation of ketones and aldehydes catalyzed by different metal complexes. With this catalytic system, the catalytic performance and catalytic stability of different Ir, Ru, and Pd complexes were more favorable than those of the previously reported systems for transfer hydrogenation. This ligand-free catalytic system showed good stability and excellent activity even with lower catalyst concentrations for the ketones and aldehydes tested.

7p langthannam 29-12-2021 5 0   Download

Coumarinyl 1,3,4-oxadiazoles were synthesized from Schiff bases and acetic anhydride. All compounds were characterized by melting points and their structures confirmed by mass and 1H and 13C NMR spectrometry. These novel coumarinyl derivatives were subjected to antibacterial, antifungal, antaflatoxigenic, and antioxidant activity. Their activity varied depending on their structure, where 2-(3-acetyl-5-(((4-methyl-2-oxo-2 H -chromen-7-yl)oxy)methyl)- 2,3-dihydro-1,3,4-oxadiazol-2-yl)-1,4-phenylene diacetate showed significant antioxidant and antibacterial activity on B. subtilis.

25p tudichquannguyet 29-11-2021 7 1   Download

Microwave irradiation has been used to improve the one-pot synthesis of substituted 2-amino-4,6-diarylnicotinonitrile in the presence of boric acid as an efficient and green catalyst under solvent-free conditions within 48–60s. All the analogs that have not been reported previously were characterized by their melting points, IR, 1H NMR, and 13C NMR spectra. One of the structures was verified by the analysis of a single crystal. The reported synthetic procedure provided remarkable advantages such as short reaction times, excellent yield, facile workup, and the use of a green catalyst.

44p tudichquannguyet 29-11-2021 6 1   Download

A series of sulfonamide derivatives were synthesized by reactions with various functional groups containing benzenesulfonyl chlorides and aniline derivatives under different substitution reaction conditions. The structures of SMZ derivatives were confirmed with melting point, FT-IR, 1 H NMR, 13 C NMR, and LC-MS/MS techniques. In order to investigate the cytotoxic effects of these derivatives, we used a model plant species. The synthesized compounds (S1–S5) and sulfamethazine (SMZ) as a positive control were applied to Arabidopsis thaliana seeds.

18p tudichquannguyet 29-11-2021 10 1   Download