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Artikel ; Online: A comparative study between two carboxymethylated polysaccharides/protein electrostatic and cross-linked nanogels constructed for caffeic acid and eugenol delivery

Rofeal, Marian / Abdelmalek, Fady / Pietrasik, Joanna / Steinbüchel, A.

International Journal of Biological Macromolecules. 2023 Aug., v. 245 p.125585-

2023

Abstract: In response to the pressing demand for functional nanomaterials synthesis and applications, two polyelectrolyte complexes (PECs) [electrostatic and cross-linked nanogels (NGs)] loaded individually with caffeic acid (CafA) and eugenol (Eug) demonstrating ... ...

Abstract	In response to the pressing demand for functional nanomaterials synthesis and applications, two polyelectrolyte complexes (PECs) [electrostatic and cross-linked nanogels (NGs)] loaded individually with caffeic acid (CafA) and eugenol (Eug) demonstrating multifunctionalities were proposed for the first time. Curdlan (Curd) and glucomannan (GM) were carboxymethylated (CMCurd and CMGM) successfully and polymeric ratios of 1:1 and 4:1 (v/v) for chitosan (Cs): CMCurd and lactoferrin (Lf): CMGM were selected for the synthesis of Cs/CMCurd and Lf/CMGM NGs. Due to the use of EDC/NHS, Cs/CMCurd/CafA and Lf/CMGM/Eug NGs possessed very uniform particles sizes of 177 ± 18 and 230 ± 17 nm with marked encapsulation efficiencies (EEs) of 76 ± 4 and 88 ± 3 %, respectively. The formation of a carbonyl-amide linkage in both cross-linked NGs was confirmed by FTIR. It should be noted, the self-assembly was not reliable in retaining enough of the encapsulated compounds. Owing to the excellent physicochemical characteristics of the loaded cross-linked NGs, they were prioritized over the electrostatic ones. Both Cs/CMCurd/CafA and Lf/CMGM/Eug NGs exhibited high colloidal stability over 12 weeks, elevated hemocompatibility, and in vitro serum stability. The generated NGs were also tailored to possess controlled release profiles for CafA and Eug over 72 h. Cs/CMCurd/CafA and Lf/CMGM/Eug NGs had promising antioxidant efficacies and could remarkably inhibit 4 bacterial pathogens at low 2–16 μg/mL concentration of encapsulated NGs compared to their unencapsulated counterparts. Interestingly, the respective NGs could significantly decline the IC₅₀ against colorectal cancer HCT-116 than conventional drugs. Based on these data, it was conferred that the investigated NGs could be promising candidates for functional foods and pharmaceutics.
Schlagwörter	antioxidants ; biocompatibility ; blood serum ; caffeic acid ; chitosan ; colorectal neoplasms ; comparative study ; crosslinking ; curdlan ; electrolytes ; encapsulation ; eugenol ; glucomannans ; lactoferrin ; nanogels ; nanomaterials ; polymers ; Carboxymethyl polysaccharides ; Cross-linking ; Drug delivery
Sprache	Englisch
Erscheinungsverlauf	2023-08
Erscheinungsort	Elsevier B.V.
Dokumenttyp	Artikel ; Online
ZDB-ID	282732-3
ISSN	1879-0003 ; 0141-8130
ISSN (online)	1879-0003
ISSN	0141-8130
DOI	10.1016/j.ijbiomac.2023.125585
Datenquelle	NAL Katalog (AGRICOLA)

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Artikel: Novel Biodegradable Nanoparticulate Chain-End Functionalized Polyhydroxybutyrate-Caffeic Acid with Multifunctionalities for Active Food Coatings.

Abdelmalek, Fady / Rofeal, Marian / Pietrasik, Joanna / Steinbüchel, Alexander

ACS sustainable chemistry & engineering

2023 Band 11, Heft 18, Seite(n) 7123–7135

Abstract: The bioactivities of polyhydroxyalkanoates have been curtailed owing to the lack of bioactive functional groups in their backbones. In this regard, polyhydroxybutyrate (PHB) produced from new locally ... ...

Abstract	The bioactivities of polyhydroxyalkanoates have been curtailed owing to the lack of bioactive functional groups in their backbones. In this regard, polyhydroxybutyrate (PHB) produced from new locally isolated
Sprache	Englisch
Erscheinungsdatum	2023-04-27
Erscheinungsland	United States
Dokumenttyp	Journal Article
ISSN	2168-0485
ISSN	2168-0485
DOI	10.1021/acssuschemeng.3c00389
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: Sustainable Polyhydroxyalkanoate Production from Food Waste via

Rofeal, Marian / Abdelmalek, Fady / Pietrasik, Joanna

Polymers

2023 Band 15, Heft 20

Abstract: In view of implementing green technologies for bioplastic turning polices, novel durable feedstock ... ...

Abstract	In view of implementing green technologies for bioplastic turning polices, novel durable feedstock for
Sprache	Englisch
Erscheinungsdatum	2023-10-20
Erscheinungsland	Switzerland
Dokumenttyp	Journal Article
ZDB-ID	2527146-5
ISSN	2073-4360 ; 2073-4360
ISSN (online)	2073-4360
ISSN	2073-4360
DOI	10.3390/polym15204173
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: A comparative study between two carboxymethylated polysaccharides/protein electrostatic and cross-linked nanogels constructed for caffeic acid and eugenol delivery.

Rofeal, Marian / Abdelmalek, Fady / Pietrasik, Joanna / Steinbüchel, Alexander

International journal of biological macromolecules

2023 Band 245, Seite(n) 125585

Abstract	In response to the pressing demand for functional nanomaterials synthesis and applications, two polyelectrolyte complexes (PECs) [electrostatic and cross-linked nanogels (NGs)] loaded individually with caffeic acid (CafA) and eugenol (Eug) demonstrating multifunctionalities were proposed for the first time. Curdlan (Curd) and glucomannan (GM) were carboxymethylated (CMCurd and CMGM) successfully and polymeric ratios of 1:1 and 4:1 (v/v) for chitosan (Cs): CMCurd and lactoferrin (Lf): CMGM were selected for the synthesis of Cs/CMCurd and Lf/CMGM NGs. Due to the use of EDC/NHS, Cs/CMCurd/CafA and Lf/CMGM/Eug NGs possessed very uniform particles sizes of 177 ± 18 and 230 ± 17 nm with marked encapsulation efficiencies (EEs) of 76 ± 4 and 88 ± 3 %, respectively. The formation of a carbonyl-amide linkage in both cross-linked NGs was confirmed by FTIR. It should be noted, the self-assembly was not reliable in retaining enough of the encapsulated compounds. Owing to the excellent physicochemical characteristics of the loaded cross-linked NGs, they were prioritized over the electrostatic ones. Both Cs/CMCurd/CafA and Lf/CMGM/Eug NGs exhibited high colloidal stability over 12 weeks, elevated hemocompatibility, and in vitro serum stability. The generated NGs were also tailored to possess controlled release profiles for CafA and Eug over 72 h. Cs/CMCurd/CafA and Lf/CMGM/Eug NGs had promising antioxidant efficacies and could remarkably inhibit 4 bacterial pathogens at low 2-16 μg/mL concentration of encapsulated NGs compared to their unencapsulated counterparts. Interestingly, the respective NGs could significantly decline the IC
Mesh-Begriff(e)	Eugenol ; Nanogels ; Polysaccharides ; Static Electricity
Chemische Substanzen	caffeic acid (U2S3A33KVM) ; Eugenol (3T8H1794QW) ; Nanogels ; Polysaccharides
Sprache	Englisch
Erscheinungsdatum	2023-06-26
Erscheinungsland	Netherlands
Dokumenttyp	Comparative Study ; Journal Article
ZDB-ID	282732-3
ISSN	1879-0003 ; 0141-8130
ISSN (online)	1879-0003
ISSN	0141-8130
DOI	10.1016/j.ijbiomac.2023.125585
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: Naturally-Sourced Antibacterial Polymeric Nanomaterials with Special Reference to Modified Polymer Variants.

Rofeal, Marian / Abdelmalek, Fady / Steinbüchel, Alexander

International journal of molecular sciences

2022 Band 23, Heft 8

Abstract: Despite the recent advancements in treating bacterial infections, antibiotic resistance (AR) is still an emerging issue. However, polymeric nanocarriers have offered unconventional solutions owing to their capability of exposing more functional groups, ... ...

Abstract	Despite the recent advancements in treating bacterial infections, antibiotic resistance (AR) is still an emerging issue. However, polymeric nanocarriers have offered unconventional solutions owing to their capability of exposing more functional groups, high encapsulation efficiency (EE) and having sustained delivery. Natural polymeric nanomaterials (NMs) are contemplated one of the most powerful strategies in drug delivery (DD) in terms of their safety, biodegradability with almost no side effects. Every nanostructure is tailored to enhance the system functionality. For example, cost-effective copper NPs could be generated in situ in cellulose sheets, demonstrating powerful antibacterial prospects for food safety sector. Dendrimers also have the capacity for peptide encapsulation, protecting them from proteolytic digestion for prolonged half life span. On the other hand, the demerits of naturally sourced polymers still stand against their capacities in DD. Hence, Post-synthetic modification of natural polymers could play a provital role in yielding new hybrids while retaining their biodegradability, which could be suitable for building novel super structures for DD platforms. This is the first review presenting the contribution of natural polymers in the fabrication of eight polymeric NMs including particulate nanodelivery and nanofabrics with antibacterial and antibiofilm prospects, referring to modified polymer derivatives to explore their full potential for obtaining sustainable DD products.
Mesh-Begriff(e)	Anti-Bacterial Agents/chemistry ; Anti-Bacterial Agents/pharmacology ; Bacterial Infections ; Cellulose ; Humans ; Nanostructures/chemistry ; Polymers/chemistry
Chemische Substanzen	Anti-Bacterial Agents ; Polymers ; Cellulose (9004-34-6)
Sprache	Englisch
Erscheinungsdatum	2022-04-07
Erscheinungsland	Switzerland
Dokumenttyp	Journal Article ; Review
ZDB-ID	2019364-6
ISSN	1422-0067 ; 1422-0067 ; 1661-6596
ISSN (online)	1422-0067
ISSN	1422-0067 ; 1661-6596
DOI	10.3390/ijms23084101
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: The Hyperproduction of Polyhydroxybutyrate Using

Abdelmalek, Fady / Steinbüchel, Alexander / Rofeal, Marian

Polymers

2022 Band 14, Heft 14

Abstract: Bioplastics are contemplated as remarkable substitutes for conventional plastics to accommodate green technological advancements. However, their industrial production has not been fully implemented owing to the cost of carbon resources. From another ... ...

Abstract	Bioplastics are contemplated as remarkable substitutes for conventional plastics to accommodate green technological advancements. However, their industrial production has not been fully implemented owing to the cost of carbon resources. From another perspective, valorizing different paper mill wastes has become a prominent research topic. These materials may serve as an affording sustainable feedstock for bioplastic production. Adjustment of cardboard waste hydrolysate as suitable fermentation media for production of bacterial polyhydroxyalkanoates (PHAs) has been investigated. Cardboard samples were defibered and dried before enzymatic hydrolysis. The enzymatic degradation of commercial cellulase was monitored over 15 days. Interestingly, 18.2 ± 0.2 g/L glucose yield was obtained from 50 g cardboard samples using a 1.5% (
Sprache	Englisch
Erscheinungsdatum	2022-07-10
Erscheinungsland	Switzerland
Dokumenttyp	Journal Article
ZDB-ID	2527146-5
ISSN	2073-4360 ; 2073-4360
ISSN (online)	2073-4360
ISSN	2073-4360
DOI	10.3390/polym14142810
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: Sustainable curdlan biosynthesis by Rahnella variigena ICRI91 via alkaline hydrolysis of Musa sapientum peels and its edible, active and modified hydrogel for Quercetin controlled release.

Rofeal, Marian / Abdelmalek, Fady / Pietrasik, Joanna / Steinbüchel, Alexander

International journal of biological macromolecules

2022

Abstract: Despite the high demand for curdlan (Curd), its industrial implementation has not reached a mature stage due to the high cost of simple sugar feed stocks. Herein, Musa sapientum peels hydrolysate (MPH) was proposed for the first time as a sustainable ... ...

Abstract	Despite the high demand for curdlan (Curd), its industrial implementation has not reached a mature stage due to the high cost of simple sugar feed stocks. Herein, Musa sapientum peels hydrolysate (MPH) was proposed for the first time as a sustainable medium for Curd generation and as an ameliorated functional biomaterial for quercetin (Quer) sustained release. In this study, banana peels have been hydrolysed by 3 % NaOH catalyst/ 60 °C, yielding high concentration of glucose 20.5 ± 0.04 and 24.3 ± 0.11 g/L and reducing sugar amount, respectively. Meanwhile, a novel local Rahnella variigena ICRI91 strain was isolated from soil, that was useful for Curd production and identified by 16S rRNA analysis. Furthermore, three-batch fermentation models were carried out using MPH for obtaining a sufficient yield of Curd. R. variigena ICRI91 accumulated a satisfactory Curd concentration; 10.3 ± 0.25 g/L; using 60 g/L MPH. On the other hand, the strain produced an impressive Curd yield; 21.5 ± 0.13 g/L with an attained productivity of 0.179 ± 0.01 g/L/h and a sugar consumption of 68 ± 0.25 % as the MPH content increased to 100 g/L. For the first time, Curd hydrogel was modified by different amount of Xylitol (Xyl), reaching good mechanical performance; 3.1 MPa and 75 % for tensile strength (TS) and elongation at break (EB), respectively. Curd/Xyl (3/5) hydrogel was then integrated with nanometer-sized quercetin nanocrystals (Quer NCs, 83 ± 0.12 nm) with high colloidal stability of -23 ± 0.05 mV. The interconnected H- bonding between Xyl and Curd was confirmed by FTIR and SEM. The generated biomaterial was tailored to exhibit a sustained Quer release over 72 h. It also has improved antibacterial efficacy against four bacterial pathogens compared to that of a free drug. In recognition of these merits, an edible polymeric nanomaterial has been proposed for the functional food and biomedicine sectors.
Sprache	Englisch
Erscheinungsdatum	2022-11-11
Erscheinungsland	Netherlands
Dokumenttyp	Journal Article
ZDB-ID	282732-3
ISSN	1879-0003 ; 0141-8130
ISSN (online)	1879-0003
ISSN	0141-8130
DOI	10.1016/j.ijbiomac.2022.11.080
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel: Lornoxicam with Low-Dose Ketamine versus Pethidine to Control Pain of Acute Renal Colic.

Metry, Ayman A / Fahmy, Neven G / Nakhla, George M / Wahba, Rami M / Ragaei, Milad Z / Abdelmalek, Fady A

Pain research and treatment

2019 Band 2019, Seite(n) 3976027

Abstract: Objectives: This study was established to compare single-dose lornoxicam 8 mg (NSAID) in addition to 0.15 mg.kg: Patients and methods: One hundred and twenty patients with acute renal colic pain received in emergency room were included in this ... ...

Abstract	Objectives: This study was established to compare single-dose lornoxicam 8 mg (NSAID) in addition to 0.15 mg.kg Patients and methods: One hundred and twenty patients with acute renal colic pain received in emergency room were included in this prospective, randomized, and double blind clinical study. They were aimlessly designated into one of two groups using a computer-generated table. Group L received lornoxicam 8 mg IV plus 0.15 mg.kg Results: The visual analogue scale was significantly lower in Group L after 30 minutes in comparison to Group P. In addition, there was statistically significant increase in Group P regarding their need for rescue analgesia after 30 min in comparison to Group L. Group P showed nonsignificantly increased sedation score compared to Group L. Conclusion: Patients receiving lornoxicam-ketamine attained greater reduction in pain scores and less side effects with better functional state and also are less likely to require further analgesia than those administered pethidine to control acute renal colic pain.
Sprache	Englisch
Erscheinungsdatum	2019-03-13
Erscheinungsland	United States
Dokumenttyp	Journal Article
ZDB-ID	2603578-9
ISSN	2090-1550 ; 2090-1542
ISSN (online)	2090-1550
ISSN	2090-1542
DOI	10.1155/2019/3976027
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel: The Effect of Adding Dopamine Infusion to Noradrenaline Infusion Combined With Restrictive Hydration on Renal Function and Tissue Perfusion during Open Abdominal Surgeries.

Metry, Ayman Anis / Tawfik, Adham F / Nakhla, George M / Wahba, Rami M / Ragaei, Milad Z / Abdelmalek, Fady A

Anesthesia, essays and researches

2019 Band 13, Heft 2, Seite(n) 229–235

Abstract: Objectives: This study was designed to assess the effect of adding dopamine infusion in addition to restrictive hydration combined with noradrenaline infusion on intraoperative renal function and serum lactate levels in comparison to restrictive ... ...

Abstract	Objectives: This study was designed to assess the effect of adding dopamine infusion in addition to restrictive hydration combined with noradrenaline infusion on intraoperative renal function and serum lactate levels in comparison to restrictive hydration combined with noradrenaline infusion only and standard hydration during open abdominal surgeries. Patients and methods: One hundred and twenty patients were randomly assigned into three equal groups undergoing major open abdominal procedures. In Group I, dopamine infusion in addition to norepinephrine infusion were administered with restrictive hydration. In Group II, norepinephrine infusion was started before the induction of anesthesia with restrictive hydration. In Groups I and II, Ringer's solution was infused at a fixed rate of 2 mL.kg Results: Serum lactate level was significantly low in Groups I and II than that in Group III intraoperatively and postoperatively. In addition, urine output was significantly more in Group I and Group III than in Group II. Creatinine level was higher with significance in Group II than in Group I and III 24 h postoperatively. Conclusion: Dopamine infusion, when added to norepinephrine infusion combined with restricted hydration, improved urine output and creatinine level. Tissue perfusion as indicated by serum lactate level was more adequate in Groups I and II than that in Group III.
Sprache	Englisch
Erscheinungsdatum	2019-06-13
Erscheinungsland	India
Dokumenttyp	Journal Article
ZDB-ID	2626233-2
ISSN	2229-7685 ; 0259-1162
ISSN (online)	2229-7685
ISSN	0259-1162
DOI	10.4103/aer.AER_34_19
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel: Comparative Study between Preemptive and Postoperative Intra-Articular Injection of Levobupivacaine and Tramadol for Control of Postoperative Pain.

Metry, Ayman Anis / Wahba, Ramy M / Nakhla, George M / Abdelmalek, Fady A / Ragaei, Milad Z / Fahmy, Neven G

Anesthesia, essays and researches

2013 Band 13, Heft 1, Seite(n) 84–90

Abstract: Background: This study had been formulated to evaluate and compare the analgesic effect of preemptive (PE), postoperative (PO), and combined knee intra-articular injection (IAI) of levobupivacaine and tramadol after knee arthroscopy.: Materials and ... ...

Abstract	Background: This study had been formulated to evaluate and compare the analgesic effect of preemptive (PE), postoperative (PO), and combined knee intra-articular injection (IAI) of levobupivacaine and tramadol after knee arthroscopy. Materials and methods: A total of 220 patients assigned for therapeutic knee arthroscopy were divided into four equal groups. Patients in Group C received IAI of 20 mL (0.5%) levobupivacaine preoperative, meanwhile patients in Group PE received IAI of 18 mL (0.5%) levobupivacaine with 100 mg tramadol (2 mL). Patients in Group PO received IAI of 18 mL (0.5%) levobupivacaine with 100 mg tramadol (2 mL) postoperatively, whereas patients in Group PE/PO received IAI of 19 mL (0.25%) levobupivacaine with 50 mg tramadol (1 mL) preoperatively and postoperatively. Numeric rating scale (NRS) had been used to assess pain sensation. Duration till the first request of rescue analgesia and number of requests were recorded. Results: NRS scores were significantly higher in Group C compared to other groups and in Group PE in comparison to PO and PE/PO groups. Frequency of rescue analgesia requests was significantly higher in Group C with significantly higher mean times of requests, while was significantly lower in Group PE/PO with significantly lower mean times of requests when compared to groups PE and PO. Conclusions: PE levobupivacaine and tramadol IAI provided satisfactory level of PO analgesia after therapeutic arthroscopy. However, combined PE and PO levobupivacaine and tramadol IAI of half dose provided PO analgesia superior to that provided by either PE or PO full-dose IAI.
Sprache	Englisch
Erscheinungsdatum	2013-02-21
Erscheinungsland	India
Dokumenttyp	Journal Article
ZDB-ID	2626233-2
ISSN	2229-7685 ; 0259-1162
ISSN (online)	2229-7685
ISSN	0259-1162
DOI	10.4103/aer.AER_20_19
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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