Synthesis and photo-bactericidal properties of a cationic porphyrin grafted onto kraft pulp fibers

2019 ◽  
Vol 23 (04n05) ◽  
pp. 489-496 ◽  
Author(s):  
Zineb Khaldi ◽  
Jean K. Nzambe Takeki ◽  
Tan-Sothea Ouk ◽  
Romain Lucas ◽  
Rachida Zerrouki
Keyword(s):  
Kraft Pulp ◽  
Cycloaddition Reaction ◽  
Antibacterial Properties ◽  
Photodynamic Inactivation ◽  
Pulp Fibers ◽  
Cationic Porphyrin ◽  
Increased Risk ◽  
Bactericidal Properties ◽  
And Staphylococcus Aureus ◽  
Growth Of Bacteria

With the increased risk of infectious disease transmissions, photodynamic inactivation of some microorganisms for antimicrobial applications has been extensively studied in recent years. In this article, we describe the synthesis of novel photo-bactericidal materials by grafting propargylated 5,10,15,20-tetra(4-pyridyl)porphyrin on kraft pulp fibers. The grafting was carried out by a Huisgen’s 1,3-dipolar azide-alkyne cycloaddition reaction. This material has been investigated for its antibacterial properties against Escherichia coli, Pseudomonas aeruginosa and Staphylococcus aureus. An interesting photo-bactericidal activity was shown: this material can be used to limit the growth of bacteria on surfaces and the formation of biofilms.

Synthesis and photo-bactericidal properties of a cationic porphyrin grafted onto kraft pulp fibers

2021 ◽  
pp. 282-289
Author(s):  
Zineb Khaldi ◽  
Jean K. Nzambe Takeki ◽  
Tan-Sothea Ouk ◽  
Romain Lucas ◽  
Rachida Zerrouki
Keyword(s):  
Kraft Pulp ◽  
Pulp Fibers ◽  
Cationic Porphyrin ◽  
Bactericidal Properties

Synthesis and antibacterial properties of thymol and carvacrol grafted onto lignocellulosic kraft fibers

2018 ◽  
Vol 33 (5) ◽  
pp. 558-570 ◽  
Author(s):  
Zineb Khaldi ◽  
Tan-Sothéa Ouk ◽  
Rachida Zerrouki
Keyword(s):  
Bacterial Infections ◽  
Antibacterial Properties ◽  
Covalent Bond ◽  
Health Issues ◽  
Pulp Fibers ◽  
Bacterial Proliferation ◽  
Antimicrobial Materials ◽  
Novel Material ◽  
Pharmaceutical Industries ◽  
And Staphylococcus Aureus

Bacterial infections and surface contaminations are worrying public health issues. It becomes urgent to find solutions. One of the ways to limit bacterial proliferation is to develop new antimicrobial materials. The phenolic compounds of essential oils like thymol and carvacrol, are attractive antibacterial candidates, which have gained great popularity in the food, cosmetic, and pharmaceutical industries. This work describes the elaboration of bioinspired antibacterial materials. Thymol and carvacrol are linked to kraft pulp fibers, via triazine link. This novel material has been investigated for its antibacterial properties against Escherichia coli and Staphylococcus aureus. The developed materials show very interesting antibacterial activity. The grafting of thymol and carvacrol by covalent bond allows to avoid the problem of their release and, thus, could maintain the antibacterial properties of support.

scholarly journals The Influence of Polysaccharides/TiO2 on the Model Membranes of Dipalmitoylphosphatidylglycerol and Bacterial Lipids

Molecules ◽  
2022 ◽  
Vol 27 (2) ◽  
pp. 343
Author(s):  
Agata Ładniak ◽  
Małgorzata Jurak ◽  
Marta Palusińska-Szysz ◽  
Agnieszka Ewa Wiącek
Keyword(s):  
Surface Pressure ◽  
Antibacterial Properties ◽  
Biological Membranes ◽  
Hysteresis Loops ◽  
Compression Modulus ◽  
Bacterial Membranes ◽  
E Coli ◽  
Cosmetic Ingredients ◽  
Bactericidal Properties ◽  
And Staphylococcus Aureus

The aim of the study was to determine the bactericidal properties of popular medical, pharmaceutical, and cosmetic ingredients, namely chitosan (Ch), hyaluronic acid (HA), and titanium dioxide (TiO2). The characteristics presented in this paper are based on the Langmuir monolayer studies of the model biological membranes formed on subphases with these compounds or their mixtures. To prepare the Langmuir film, 1,2-dipalmitoyl-sn-glycero-3-phospho-rac-(1-glycerol) (DPPG) phospholipid, which is the component of most bacterial membranes, as well as biological material-lipids isolated from bacteria Escherichia coli and Staphylococcus aureus were used. The analysis of the surface pressure-mean molecular area (π-A) isotherms, compression modulus as a function of surface pressure, CS−1 = f(π), relative surface pressure as a function of time, π/π0 = f(t), hysteresis loops, as well as structure visualized using a Brewster angle microscope (BAM) shows clearly that Ch, HA, and TiO2 have antibacterial properties. Ch and TiO2 mostly affect S. aureus monolayer structure during compression. They can enhance the permeability of biological membranes leading to the bacteria cell death. In turn, HA has a greater impact on the thickness of E. coli film.

Desorption of Cationic Polyacrylamide from Bleached Kraft Pulp Fibers

1987 ◽  
Vol 19 (5-6) ◽  
pp. 939-951 ◽  
Author(s):  
Clifton F. Warren ◽  
R. Gehr
Keyword(s):  
Adsorption Isotherm ◽  
Total Nitrogen ◽  
Kraft Pulp ◽  
Detection System ◽  
Cationic Polyelectrolyte ◽  
Chemiluminescence Detection ◽  
Pulp Fibers ◽  
Paper Manufacturing ◽  
Bleached Kraft Pulp ◽  
Receiving Water

The adsorption and desorption behaviour of a cationic polyelectrolyte contacted with wood pulp fibers was determined by total nitrogen analysis using a pyrolysis/chemiluminescence detection system. Dialysed polymer generated an adsorption isotherm of higher affinity than did non-dialysed polymer. Capacity adsorption was maximized at pH 7, but decreased in the presence of alum depending on the dosage. Desorption of non-dialysed polymer was caused by changes in pH above or below 7.0 as well as by addition of alum. However for the alum doses typically encountered in paper manufacturing, significant desorption is unlikely. Nevertheless, the contaminants in non-dialysed polymers do hinder adsorption, and effluents from those processes using both alum and polymer may contain quantities of unadsorbed or desorbed polyelectrolytes which could be damaging to receiving water bodies.

scholarly journals Enhanced Conductivity and Antibacterial Behavior of Cotton via the Electroless Deposition of Silver

Molecules ◽  
2021 ◽  
Vol 26 (16) ◽  
pp. 4731
Author(s):  
Changkun Liu ◽  
Dan Liao ◽  
Fuqing Ma ◽  
Zenan Huang ◽  
Ji’an Liu ◽  
...  
Keyword(s):  
Electroless Deposition ◽  
Deposition Time ◽  
Antibacterial Properties ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
High Antibacterial Activity ◽  
Physical And Chemical ◽  
And Staphylococcus Aureus ◽  
Enhanced Conductivity ◽  
And Chemical Properties

In this study, the surface-initiated atom transfer radical polymerization (SI-ATRP) technique and electroless deposition of silver (Ag) were used to prepare a novel multi-functional cotton (Cotton-Ag), possessing both conductive and antibacterial behaviors. It was found that the optimal electroless deposition time was 20 min for a weight gain of 40.4%. The physical and chemical properties of Cotton-Ag were investigated. It was found that Cotton-Ag was conductive and showed much lower electrical resistance, compared to the pristine cotton. The antibacterial properties of Cotton-Ag were also explored, and high antibacterial activity against both Escherichia coli and Staphylococcus aureus was observed.

scholarly journals Transformed tissue of Dionaea muscipula J. Ellis as a source of biologically active phenolic compounds with bactericidal properties

2021 ◽  
Vol 105 (3) ◽  
pp. 1215-1226
Author(s):  
Wojciech Makowski ◽  
Aleksandra Królicka ◽  
Anna Nowicka ◽  
Jana Zwyrtková ◽  
Barbara Tokarz ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Phenolic Acids ◽  
Antibacterial Properties ◽  
Biologically Active ◽  
Plant Genome ◽  
Resistant Bacteria ◽  
Shoot Cultures ◽  
Transformed Plants ◽  
Dionaea Muscipula ◽  
Bactericidal Properties

Abstract The Venus flytrap (Dionaea muscipula J. Ellis) is a carnivorous plant able to synthesize large amounts of phenolic compounds, such as phenylpropanoids, flavonoids, phenolic acids, and 1,4-naphtoquinones. In this study, the first genetic transformation of D. muscipula tissues is presented. Two wild-type Rhizobium rhizogenes strains (LBA 9402 and ATCC 15834) were suitable vector organisms in the transformation process. Transformation led to the formation of teratoma (transformed shoot) cultures with the bacterial rolB gene incorporated into the plant genome in a single copy. Using high-pressure liquid chromatography, we demonstrated that transgenic plants were characterized by an increased quantity of phenolic compounds, including 1,4-naphtoquinone derivative, plumbagin (up to 106.63 mg × g−1 DW), and phenolic acids (including salicylic, caffeic, and ellagic acid), in comparison to non-transformed plants. Moreover, Rhizobium-mediated transformation highly increased the bactericidal properties of teratoma-derived extracts. The antibacterial properties of transformed plants were increased up to 33% against Staphylococcus aureus, Enterococcus faecalis, and Escherichia coli and up to 7% against Pseudomonas aeruginosa. For the first time, we prove the possibility of D. muscipula transformation. Moreover, we propose that transformation may be a valuable tool for enhancing secondary metabolite production in D. muscipula tissue and to increase bactericidal properties against human antibiotic-resistant bacteria. Key points • Rhizobium-mediated transformation created Dionaea muscipula teratomas. • Transformed plants had highly increased synthesis of phenolic compounds. • The MBC value was connected with plumbagin and phenolic acid concentrations.

Durability of cementitious materials reinforced with various Kraft pulp fibers

2018 ◽  
Vol 191 ◽  
pp. 1191-1200 ◽  
Author(s):  
Emad Booya ◽  
Hossein Ghaednia ◽  
Sreekanta Das ◽  
Harshad Pande
Keyword(s):  
Kraft Pulp ◽  
Cementitious Materials ◽  
Pulp Fibers

scholarly journals APPLICATION OF NATURAL PETROLEUM ACIDS AS HEXAMETYLENDIAMIN COMPLEX COMBINES AS BACTERIA

2021 ◽  
Vol 10 (06) ◽  
pp. 58-63
Author(s):  
Teyyub İsmayılov, Sevinj Suleymanova Teyyub İsmayılov, Sevinj Suleymanova
Keyword(s):  
Room Temperature ◽  
Bactericidal Effect ◽  
Complex Compounds ◽  
Chemical Parameters ◽  
Sulfate Reducing ◽  
Bactericidal Properties ◽  
Physical And Chemical ◽  
Reducing Bacteria ◽  
Growth Of Bacteria ◽  
Petroleum Acid

Complex compounds were synthesized by mixing natural petroleum acids with hexamethylene diamine at a ratio of 1:1 and 2:1 at room temperature, IR spectra of the complexes were studied and confirmed, physical and chemical parameters were determined, solutions were prepared and bactericidal properties were studied. The bactericidal effect of a complex compound of natural petroleum acids synthesized with hexamethylenediamine in a ratio of 1: 1 mol at a concentration of 250 mg / l is 95%, a complex combination obtained at a concentration of 500 mg / l and 1000 mg / l is 100%, bactericidal at a concentration of 2: 1 mol at a concentration of 250 mg / l The effect was 98%, 100% at 500 and 1000 mg / l concentrations. According to the results, complex compounds of natural petroleum acids synthesized with hexamethylenediamine can be used to prevent the growth of bacteria. Keywords: natural petroleum acid, hexamethylenediamine, sulfate-reducing bacteria, complex compounds, bactericidal properties.

scholarly journals New technology for developing a lightweight refiner plate for hardwood kraft pulp fibers

BioResources ◽  
2020 ◽  
Vol 15 (4) ◽  
pp. 9128-9142
Author(s):  
Byeong-Geol Min ◽  
Ji-Young Lee ◽  
Chul-Hwan Kim ◽  
See-Han Park ◽  
Min-Seok Lee ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Fiber Length ◽  
Kraft Pulp ◽  
New Technology ◽  
Strength Properties ◽  
Pulp Fibers ◽  
Low Intensity ◽  
Novel Technology ◽  
Draft Angle ◽  
Reducing Energy

Sand casting makes it difficult to manufacture a fine bar plate for low intensity refining. This study introduced a novel technology for manufacturing lightweight fine bar plates and compared the effects to traditional bar plates. The lightweight fine bar plate base was manufactured using a lightweight aluminum alloy and stainless-steel. Because the bars were inserted into the plate vertically without the draft angle, the stock throughput was improved by approximately 27% compared to the sand-casted bar plates. Additionally, the lightweight fine bar plate maximized internal and external fibrillation while minimizing fiber length loss. In conclusion, the lightweight fine bar plate was shown to be more effective in improving the strength properties of paper and reducing energy consumption.

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