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Polez RT, Ajiboye MA, Österberg M, Horn MM. Chitosan hydrogels enriched with bioactive phloroglucinol for controlled drug diffusion and potential wound healing. Int J Biol Macromol 2024; 265:130808. [PMID: 38490386 DOI: 10.1016/j.ijbiomac.2024.130808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 02/27/2024] [Accepted: 03/10/2024] [Indexed: 03/17/2024]
Abstract
We report a facile strategy to prepare chitosan (CS) hydrogels that eliminates the need for chemical crosslinking for advanced biomedical therapies. This approach gives controlled properties to the hydrogels by incorporating a natural bioactive phenolic compound, phloroglucinol (PG), into their microstructure. The adsorption of PG onto CS chains enhanced the hydrogels' antioxidant activity by up to 25 % and resulted in a denser, more entangled structure, reducing the pore size by 59 μm while maintaining porosity above 94 %. This allowed us to finely adjust pore size and swelling capacity. These structural properties make these hydrogels well-suited for wound healing dressings, promoting fibroblast proliferation and exhibiting excellent hemocompatibility. Furthermore, to ensure the versatility of these hydrogels, herein, we demonstrate their potential as drug delivery systems, particularly for dermal infections. The drug release can be controlled by a combination of drug diffusion through the swollen hydrogel and relaxation of the CS chains. In summary, our hydrogels leverage the synergistic effects of CS's antibacterial and antifungal properties with PG's antimicrobial and anti-inflammatory attributes, positioning them as promising candidates for biomedical and pharmaceutical applications, more specifically in advanced wound healing therapies with local drug delivery.
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Affiliation(s)
- Roberta Teixeira Polez
- Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, P.O. Box 16300, FIN-00076 Aalto, Espoo, Finland
| | - Margaret A Ajiboye
- Physical Chemistry of Nanomaterials, Institute of Chemistry, University of Kassel, 34109 Kassel, Germany
| | - Monika Österberg
- Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, P.O. Box 16300, FIN-00076 Aalto, Espoo, Finland
| | - Marilia M Horn
- Physical Chemistry of Nanomaterials, Institute of Chemistry, University of Kassel, 34109 Kassel, Germany.
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Goetjes V, von Boyneburgk CL, Heim HP, Horn MM. Influence of Chitosan and Grape Seed Extract on Thermal and Mechanical Properties of PLA Blends. Polymers (Basel) 2023; 15:polym15061570. [PMID: 36987350 PMCID: PMC10051302 DOI: 10.3390/polym15061570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 03/17/2023] [Accepted: 03/20/2023] [Indexed: 03/30/2023] Open
Abstract
Blends based on polylactic acid (PLA), chitosan, and grape seed extract (GE) were prepared by extrusion and injection molding. The effect of chitosan (5% and 15% on PLA basis) and natural extract (1% on PLA basis) incorporated into the PLA host matrix was explored regarding the thermal and mechanical properties. GE showed antioxidant activity, as determined by the DPPH assay method. Chitosan and GE affect the degree of crystallinity up to 30% as the polysaccharide acts as a nucleating agent, while the extract reduces the mobility of PLA chains. The decomposition temperature was mainly affected by adding chitosan, with a reduction of up to 25 °C. The color of the blends was specially modified after the incorporation of both components, obtaining high values of b* and L* after the addition of chitosan, while GE switched to high values of a*. The elongation at break (EB) exhibited that the polysaccharide is mainly responsible for its reduction of around 50%. Slight differences were accessed in tensile strength and Young's modulus, which were not statistically significant. Blends showed increased irregularities in their surface appearance, as observed by SEM analysis, corresponding to the partial miscibility of both polymers.
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Affiliation(s)
- Victoria Goetjes
- Institute of Material Engineering, Polymer Engineering, University of Kassel, Mönchebergstr. 3, 34125 Kassel, Germany
| | - Claudia L von Boyneburgk
- Institute of Material Engineering, Polymer Engineering, University of Kassel, Mönchebergstr. 3, 34125 Kassel, Germany
| | - Hans-Peter Heim
- Institute of Material Engineering, Polymer Engineering, University of Kassel, Mönchebergstr. 3, 34125 Kassel, Germany
| | - Marilia M Horn
- Physical Chemistry of Nanomaterials, Institute of Chemistry and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, Heinich-Plett Straße 40, 34109 Kassel, Germany
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Milan E, Bertolo MRV, Martins VCA, Sobrero CE, Plepis AMG, Fuhrmann-Lieker T, Horn MM. Effects of Mangosteen Peel Phenolic Compounds on Tilapia Skin Collagen-Based Mineralized Scaffold Properties. ACS Omega 2022; 7:34022-34033. [PMID: 36188292 PMCID: PMC9520718 DOI: 10.1021/acsomega.2c03266] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 08/23/2022] [Indexed: 06/16/2023]
Abstract
A proper valorization of biological waste sources for an effective conversion into composites for tissue engineering is discussed in this study. Hence, the collagen and the phenolic compound applied in this investigation were extracted from waste sources, respectively, fish industry rejects and the peels of the mangosteen fruit. Porous scaffolds were prepared by combining both components at different compositions and mineralized at different temperatures to evaluate the modifications in the biomimetic formation of apatite. The inclusion of mangosteen extract showed the advantage of increasing the collagen denaturation temperature, improving the stability of its triple helix. Moreover, the extract provided antioxidant activity due to its phenolic composition, as confirmed by 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) and 2,2-diphenyl-1-picrylhydrazyl (DPPH) antioxidant assays. Mineralization was successfully achieved as indicated by thermogravimetry and scanning electron microscopy. A higher temperature and a lower extract concentration reduced the calcium phosphate deposits. The extract also affected the pore size, particularly at a lower concentration. The X-ray diffraction pattern identified a low degree of crystallization. A high mineralization temperature induced the formation of smaller crystallites ranging from 18.9 to 25.4 nm. Although the deposited hydroxyapatite showed low crystallinity, the scaffolds are suitable for bone tissue applications and may be effective in controlling the resorbability rate in tissue regeneration.
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Affiliation(s)
- Eduardo
P. Milan
- Interunits
Graduate Program in Bioengineering (EESC/FMRP/IQSC), University of São Paulo (USP), São Carlos 13566-590, Brazil
- Physical
Chemistry of Nanomaterials, Institute of Chemistry and Center for
Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, Kassel 34132, Germany
| | - Mirella R. V. Bertolo
- São
Carlos Institute of Chemistry, University
of São Paulo (USP), São
Carlos 13566-590, Brazil
| | - Virginia C. A. Martins
- São
Carlos Institute of Chemistry, University
of São Paulo (USP), São
Carlos 13566-590, Brazil
| | | | - Ana M. G. Plepis
- Interunits
Graduate Program in Bioengineering (EESC/FMRP/IQSC), University of São Paulo (USP), São Carlos 13566-590, Brazil
- São
Carlos Institute of Chemistry, University
of São Paulo (USP), São
Carlos 13566-590, Brazil
| | - Thomas Fuhrmann-Lieker
- Physical
Chemistry of Nanomaterials, Institute of Chemistry and Center for
Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, Kassel 34132, Germany
| | - Marilia M. Horn
- Physical
Chemistry of Nanomaterials, Institute of Chemistry and Center for
Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, Kassel 34132, Germany
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Milan EP, Martins VC, Horn MM, Plepis AM. Influence of blend ratio and mangosteen extract in chitosan/collagen gels and scaffolds: Rheological and release studies. Carbohydr Polym 2022; 292:119647. [DOI: 10.1016/j.carbpol.2022.119647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 05/18/2022] [Accepted: 05/19/2022] [Indexed: 11/02/2022]
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Milan EP, Rodrigues MÁV, Martins VCA, Plepis AMG, Fuhrmann-Lieker T, Horn MM. Mineralization of Phosphorylated Fish Skin Collagen/Mangosteen Scaffolds as Potential Materials for Bone Tissue Regeneration. Molecules 2021; 26:2899. [PMID: 34068232 PMCID: PMC8153159 DOI: 10.3390/molecules26102899] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 05/07/2021] [Accepted: 05/11/2021] [Indexed: 11/23/2022] Open
Abstract
In this study, a potential hard tissue substitute was mimicked using collagen/mangosteen porous scaffolds. Collagen was extracted from Tilapia fish skin and mangosteen from the waste peel of the respective fruit. Sodium trimetaphosphate was used for the phosphorylation of these scaffolds to improve the nucleation sites for the mineralization process. Phosphate groups were incorporated in the collagen structure as confirmed by their attenuated total reflection Fourier transform infrared (ATR-FTIR) bands. The phosphorylation and mangosteen addition increased the thermal stability of the collagen triple helix structure, as demonstrated by differential scanning calorimetry (DSC) and thermogravimetry (TGA) characterizations. Mineralization was successfully achieved, and the presence of calcium phosphate was visualized by scanning electron microscopy (SEM). Nevertheless, the porous structure was maintained, which is an essential characteristic for the desired application. The deposited mineral was amorphous calcium phosphate, as confirmed by energy dispersive X-ray spectroscopy (EDX) results.
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Affiliation(s)
- Eduardo P. Milan
- Interunits Graduate Program in Bioengineering (EESC/FMRP/IQSC), University of São Paulo (USP), São Carlos 13560-970, Brazil; (E.P.M.); (A.M.G.P.)
- Physical Chemistry of Nanomaterials, Institute of Chemistry and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, 34109 Kassel, Germany;
| | - Murilo Á. V. Rodrigues
- São Carlos Institute of Chemistry, University of São Paulo (USP), São Carlos 13560-970, Brazil; (M.Á.V.R.); (V.C.A.M.)
| | - Virginia C. A. Martins
- São Carlos Institute of Chemistry, University of São Paulo (USP), São Carlos 13560-970, Brazil; (M.Á.V.R.); (V.C.A.M.)
| | - Ana M. G. Plepis
- Interunits Graduate Program in Bioengineering (EESC/FMRP/IQSC), University of São Paulo (USP), São Carlos 13560-970, Brazil; (E.P.M.); (A.M.G.P.)
- São Carlos Institute of Chemistry, University of São Paulo (USP), São Carlos 13560-970, Brazil; (M.Á.V.R.); (V.C.A.M.)
| | - Thomas Fuhrmann-Lieker
- Physical Chemistry of Nanomaterials, Institute of Chemistry and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, 34109 Kassel, Germany;
| | - Marilia M. Horn
- Physical Chemistry of Nanomaterials, Institute of Chemistry and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, 34109 Kassel, Germany;
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Horn MM, Amaro Martins VC, Maria De Guzzi Plepis A. Rheological characterization of chitosan/starch blends by varying polyols and amylopectin content. J DISPER SCI TECHNOL 2018. [DOI: 10.1080/01932691.2018.1515025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Marilia M. Horn
- Programa de Pós-Graduação Interunidades Bioengenharia, EESC/FMRP/IQSC – Universidade de São Paulo – USP, São Carlos, Brazil
| | | | - Ana Maria De Guzzi Plepis
- Programa de Pós-Graduação Interunidades Bioengenharia, EESC/FMRP/IQSC – Universidade de São Paulo – USP, São Carlos, Brazil
- Instituto de Química de São Carlos, Universidade de São Paulo, USP, São Carlos, Brazil
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Horn MM, Martins VCA, Fernandes YOM, Vulcani VAS, Plepis AMG. Development and characterization of collagen/gelatin films and gels incorporated with pequi oil. J Appl Polym Sci 2018. [DOI: 10.1002/app.46627] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Marilia M. Horn
- Instituto de Química de São Carlos; Universidade de São Paulo; São Carlos 13564-300 Brazil
| | - Virginia C. A. Martins
- Instituto de Química de São Carlos; Universidade de São Paulo; São Carlos 13564-300 Brazil
| | - Yasmin O. M. Fernandes
- Instituto de Química de São Carlos; Universidade de São Paulo; São Carlos 13564-300 Brazil
| | | | - Ana Maria G. Plepis
- Instituto de Química de São Carlos; Universidade de São Paulo; São Carlos 13564-300 Brazil
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Horn MM, Martins VC, Plepis AMDG. Influence of collagen addition on the thermal and morphological properties of chitosan/xanthan hydrogels. Int J Biol Macromol 2015; 80:225-30. [DOI: 10.1016/j.ijbiomac.2015.06.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Revised: 05/18/2015] [Accepted: 06/09/2015] [Indexed: 10/23/2022]
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Horn MM, Martins VCA, Plepis AMG. Effects of starch gelatinization and oxidation on the rheological behavior of chitosan/starch blends. POLYM INT 2011. [DOI: 10.1002/pi.3021] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Abstract
Curvas termogravimétricas com diferentes razões de aquecimento foram utilizadas para a determinação de parâmetros cinéticos seguindo o método de Flynn-Wall. Para isso, foi utilizado um hidrogel preparado a partir da mistura de dois polissacarídeos, quitosana/xantana (QX) e outro, contendo além destes, colágeno (QXC). Os resultados mostraram que o valor de energia de ativação para o hidrogel QX foi de 3,44 kJ.mol-1, enquanto que para o QXC foi de 14,84 kJ.mol-1, sugerindo que a água presente no hidrogel contendo colágeno está mais fortemente ligada aos biopolímeros. Isto pode ter ocorrido devido à presença de grupos carboxílicos na estrutura colagênica.
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Horn MM, Martins VCA, de Guzzi Plepis AM. Interaction of anionic collagen with chitosan: Effect on thermal and morphological characteristics. Carbohydr Polym 2009. [DOI: 10.1016/j.carbpol.2008.12.039] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Galina CS, Horn MM, Molina R. Reproductive behaviour in bulls raised under tropical and subtropical conditions. Horm Behav 2007; 52:26-31. [PMID: 17482187 DOI: 10.1016/j.yhbeh.2007.03.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2007] [Revised: 03/28/2007] [Accepted: 03/29/2007] [Indexed: 11/22/2022]
Abstract
The present review describes the behavioral characteristics of bulls raised under tropical and subtropical conditions and emphasizes the difficulties associated with adequately monitoring their performance in the field to predict reproductive potential. Most of the information generated for improving our understanding of bull behavior under range conditions has been generated in Bos taurus bulls. The limited information available in Bos indicus indicates that males searching for cows in estrus display different sexual patterns when compared to B. taurus bulls and a poor selection of a sire utilized in range conditions can have an important impact in cattle production. Screening and selecting [cg1] bulls for desirable reproductive traits and high libido is known to improve the reproductive performance of the herd. The reproductive and genetic potential of a bull is influenced by factors such as management, age, nutrition and problems related to the female such as embryonic death and anestrus. However, behavioral characteristics of bulls when detecting and serving cows in estrus is poorly understood.
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Affiliation(s)
- C S Galina
- Departamento de Reproducción, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Mexico.
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Horn MM, Drewes SE, Brown NJ, Munro OQ, Meyer JJ, Mathekga AD. Transformation of naturally-occurring 1,9-trans-9,5-cis sweroside to all trans sweroside during acetylation of sweroside aglycone. Phytochemistry 2001; 57:51-56. [PMID: 11336260 DOI: 10.1016/s0031-9422(00)00460-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
From the rootstock of Scabiosa columbria L. loganin and sweroside were isolated. Sweroside showed moderate antibacterial activity. Pure sweroside was converted to the sweroside aglycone 1-acetoxy derivative (DABCO/Ac2O) after hydrolysis of the glucose unit. X-ray crystallography of the monoacetate showed unambiguously that it had been transformed to a new seco-iridoid having the novel trans diaxial configuration for the protons on C-1, C-9 and C-5. The mechanism for the rearrangement is discussed.
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Affiliation(s)
- M M Horn
- School of Chemical and Physical Sciences, University of Natal, Scottsville, South Africa
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Zschocke S, van Staden J, Paulus K, Bauer R, Horn MM, Munro OQ, Brown NJ, Drewes SE. Stereostructure and anti-inflammatory activity of three diastereomers of ocobullenone from Ocotea bullata. Phytochemistry 2000; 54:591-595. [PMID: 10963452 DOI: 10.1016/s0031-9422(00)00163-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A novel diastereomer of ocobullenone. designated as sibyllenone, was isolated from the stem bark of mature Ocotea bullata in the course of a search for anti-inflammatory compounds from this plant. The stereostructure was established by X-ray crystallography and corroborated by NOESY analysis. Ocobullenone, obtained previously, was re-isolated and crystallised successfully for X-ray analysis, thus making possible an accurate spatial comparison of ocobullenone, iso-ocobullenone and the new stereoisomer. Tested pharmacologically for cyclooxygenase-1 and 2, and 5-lipoxygenase inhibition, sibyllenone was the only compound from O. bullata which showed good inhibitory activity towards 5-lipoxygenase.
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Affiliation(s)
- S Zschocke
- Research Centre for Plant Growth and Development, School of Botany and Zoology, University of Natal Pietermaritzburg, Scottsville, South Africa
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Abstract
A new acylated form of a phloroglucinol with significant antimicrobial properties was isolated by bioactivity guided fractionation from Helichrysum caespititium (Asteraceae). The structure elucidation, and conformation of the new phloroglucinol, 2-methyl-4-[2',4',6'-trihydroxy-3'-(2-methylpropanoyl) phenyl]but-2-enyl acetate, was established by high field NMR spectroscopic and MS data. The compound inhibited growth of Bacillus cereus, B. pumilus, B. subtilis and Micrococcus kristinae at the very low concentration of 0.5 microg/ml and Staphylococcus aureus at 5.0 microg/ml. Six fungi tested were similarly inhibited at low MICs, Aspergillus flavus and A. niger (1.0 microg/ml), Cladosporium chladosporioides (5 microg/ml), C. cucumerinum and C. sphaerospermum (0.5 microg/ml) and Phylophthora capsici at 1.0 microg/ml.
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Affiliation(s)
- A D Mathekga
- Department of Botany, University of Pretoria, South Africa
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Abstract
From fresh leaves of Alberta magna two new iridoids and a known cyclopentene dialdehyde have been identified. One of the new compounds has the less-common irido-lactone structure and has an enolic hydrogen on C-4. Two of the compounds show short term mosquito-repellent effects.
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Affiliation(s)
- S E Drewes
- Department of Chemistry and Chemical Technology, University of Natal, Pietermaritzburg, South Africa
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Horn MM. We are family. Imprint 1996; 43:64. [PMID: 8715216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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