The Effect of Ultrasonic Treatment on the Binding of the Inclusion Complex β-Cyclodextrin-peppermint Oil with Cellulose Material

The purpose of the research was to measure the increase in the binding of inclusion complexes β-cyclodextrin-peppermint oil (β-CD_PM) to cellulose in cotton and cotton/polyester material with BTCA as the crosslinking agent by applying an ultrasonic bath at room temperature and a frequency of 80 kHz for 10 min. After sonication, the samples were left in a bath for 24 h after which they were dried, thermocondensed and subjected to a number of wash cycles. The treated samples were analysed with Attenuated total reflection (ATR) units heated up to 300 °C (Golden Gate (FTIR-ATR)) to monitor chemical changes indicative of crosslinking, while physico-chemical changes in the samples were monitored by using Fourier transform infrared spectroscopy (FTIR-ATR). Mechanical properties were measured according to EN ISO 13934-1:1999, and coloristic changes were evaluated by the whiteness degree according to CIE (WCIE) and the yellowing index (YI), while antimicrobial activity was determined according to AATCC TM 147-2016. The results show a physico-chemical modification of the UZV-treated cellulosic material. Moreover, partial antimicrobial efficacy on Gram-negative bacteria was confirmed for treated fabrics.

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Study of Physico-chemical Characteristics and Pharmacological Effects of 1-Ethyl-Salicyldene-bis-Ethylene-Diamine and Its Complex with Mn(II)

Revista de Chimie ◽

10.37358/rc.19.7.7375 ◽

2019 ◽

Vol 70 (7) ◽

pp. 2534-2537

Author(s):

Gladiola Tantaru ◽

Mihai Apostu ◽

Antonia Poiata ◽

Mihai Nichifor ◽

Nela Bibire ◽

...

Keyword(s):

Schiff Base ◽

Chemical Structure ◽

Antimicrobial Activities ◽

Ethylene Diamine ◽

Chemical Characteristics ◽

Gram Negative Bacteria ◽

Pharmacological Effects ◽

Physico Chemical ◽

Anti Inflammatory ◽

Inflammatory Effect

The paper presents the synthesis of a new complex combination of a Bis-Schiff base with Mn(II) ions with great potential for antimicrobial and anti-inflammatory activity. A new complex of the Salen-type ligand, 1-ethyl-salicylidene-bis-ethylene diamine was synthetized using Mn(II) ions. The chemical structure was confirmed through 1H-NMR and IR spectroscopy. The antimicrobial activities of the Bis-Schiff base and its complex were tested in comparison with Ampicillin, Chloramphenicol, Tetracycline, Ofloxacin and Nystatin. Those compounds were found to be active against Gram-positive or Gram-negative bacteria, and had an anti-inflammatory effect comparable to that of Indomethacin.

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15N NMR studies provide insights into physico-chemical properties of room-temperature ionic liquids

Physical Chemistry Chemical Physics ◽

10.1039/d1cp01492g ◽

2021 ◽

Author(s):

Christoph Wiedemann ◽

David Fushman ◽

Frank Bordusa

Keyword(s):

Ionic Liquids ◽

Room Temperature ◽

Chemical Properties ◽

Room Temperature Ionic Liquids ◽

15N Nmr ◽

Nmr Studies ◽

Physico Chemical ◽

Alternative Solvents

Ionic liquids (ILs) have gained a lot of attention as alternative solvents in many fields of science in the last two decades. It is known that the type of anion...

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Cholinium-amino acid based ionic liquids: a new method of synthesis and physico-chemical characterization

Physical Chemistry Chemical Physics ◽

10.1039/c5cp01612f ◽

2015 ◽

Vol 17 (32) ◽

pp. 20687-20698 ◽

Cited By ~ 80

Author(s):

Serena De Santis ◽

Giancarlo Masci ◽

Francesco Casciotta ◽

Ruggero Caminiti ◽

Eleonora Scarpellini ◽

...

Keyword(s):

Ionic Liquids ◽

Amino Acid ◽

Room Temperature ◽

Chemical Characterization ◽

New Method ◽

Room Temperature Ionic Liquids ◽

Synthetic Method ◽

Chemical Structures ◽

Physico Chemical ◽

Wide Range

Fourteen cholinium-amino acid based room temperature ionic liquids were prepared using a cleaner synthetic method. Chemicophysical properties were well correlated with the wide range of amino acid chemical structures.

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Physico-chemical changes in bauxite residue following application of spent mushroom compost and gypsum

Land Degradation and Development ◽

10.1002/ldr.926 ◽

2009 ◽

Vol 20 (5) ◽

pp. 572-581 ◽

Cited By ~ 57

Author(s):

R. G. Courtney ◽

S. N. Jordan ◽

T. Harrington

Keyword(s):

Bauxite Residue ◽

Mushroom Compost ◽

Chemical Changes ◽

Spent Mushroom Compost ◽

Physico Chemical

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Physico-Chemical Characterization of Alumina Sols Prepared From Aluminum Alcoxides

MRS Proceedings ◽

10.1557/proc-73-611 ◽

1986 ◽

Vol 73 ◽

Cited By ~ 1

Author(s):

William L. Olson

Keyword(s):

Room Temperature ◽

Gel Filtration ◽

Chemical Characterization ◽

Process Conditions ◽

Chemical Processing ◽

Rotary Evaporation ◽

Physico Chemical ◽

Elution Curves ◽

Alumina Sol

ABSTRACTAlumina sols derived from aluminum sec-butoxide (Yoldas) were characterized. The distribution of the polymer sizes within the sol, determined by gel filtration chromatography (GFC), was found to be dramatically affected by small changes in the chemical processing or preparative procedure. Aging the sol at room temperature for two weeks produced no significant change in the GFC elution curves of the alumina sol. Sols with a “milky” appearance were found to exhibit a wider distribution of polymers by GFC than transparent sols. Rotary evaporation of the sol followed by redissolution of the residue was found to change the polymer size distribution described by the gel filtration elution curves. These observations coupled with 27Al NMR spectroscopy and viscometry measurements were used to elucidate the effects of process conditions and aging on the molecular structure of the sol.

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Characteristics of Packaged Water under Different Storage Conditions Within Osogbo Metropolis

UNIOSUN Journal of Engineering and Environmental Sciences ◽

10.36108/ujees/0202.20.0221 ◽

2020 ◽

Vol 2 (2) ◽

Author(s):

O.O Fadipe

Keyword(s):

Room Temperature ◽

Control Unit ◽

Storage Conditions ◽

Prolonged Storage ◽

E Coli ◽

Physico Chemical ◽

Routine Basis ◽

Regulatory Bodies ◽

Microbiological Analyses ◽

Sachet Water

The study investigated the characteristics of packaged water stored under ambient and sunlight conditions. This is with a view to testing the effect of prolonged storage under different storage conditions on its quality. In addition it analyzed the interactions between the parameters. Two packs each of bottled and sachet water was purchased from each factory at the point of production and ready for distribution to wholesalers. Twenty eight pieces of packaged water from each factory were kept at room temperature and the same quantity were kept under sunlight. Physico-chemical and microbiological analyses were carried out on the remaining packaged water within 24hrs. Half of the samples stored at the two storage conditions were removed for analysis at 3 weeks while the remaining half was analyzed after 6weeks. The physico-chemical characteristics were within the WHO recommended values except for the pH of some samples that have values in the acidic range of 6.2-6.48. All the physico-chemical values increased for samples kept under sunlight. All the water samples showed growth in faecal coliform (4-46 cfu/100 mL) and E. coli (0-13 cfu/100 mL) for samples kept under sunlight at three weeks and this growth increased to the sixth week. The presence of E. coli is an indication that the packaged water is not pure. Displaying packaged water under the sunlight and storing beyond 3 weeks by vendors have effect on the potability of the product. The regulatory bodies should raise awareness and ensure manufacturer have a quality control unit to test on a routine basis.

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