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Zhai Z, Meng M, Zhang Z, Kim J, Zhu Y. Metabolism of a fungicide propiconazole by Cunninghamella elegans ATCC36112. Arch Microbiol 2024; 206:356. [PMID: 39026110 DOI: 10.1007/s00203-024-04062-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Revised: 06/18/2024] [Accepted: 06/18/2024] [Indexed: 07/20/2024]
Abstract
The metabolic breakdown of propiconazole by fungi was examined, and it was found that the microbial model (Cunninghamella elegans ATCC36112) efficiently degrades the triazole fungicide propiconazole through the action of cytochrome P450. This enzyme primarily facilitates the oxidation and hydrolysis processes involved in phase I metabolism. We observed major metabolites indicating hydroxylation/oxidation of propyl groups of propiconazole. Around 98% of propiconazole underwent degradation within a span of 3 days post-treatment, leading to the accumulation of five metabolites (M1-M5). The experiments started with a preliminary identification of propiconazole and its metabolites using GC-MS. The identified metabolites were then separated and identified by in-depth analysis using preparative UHPLC and MS/MS. The metabolites of propiconazole are M1 (CGA-118245), M2(CGA-118244), M3(CGA-136735), M4(GB-XLIII-42-1), and M5(SYN-542636). To further investigate the role of key enzymes in potential fungi, we treated the culture medium with piperonyl butoxide (PB) and methimazole (MZ), and then examined the kinetic responses of propiconazole and its metabolites. The results indicated a significant reduction in the metabolism rate of propiconazole in the medium treated with PB, while methimazole showed weaker inhibitory effects on the metabolism of propiconazole in the fungus C. elegans.
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Grants
- Project PJ0140182018 National Institute of Agricultural Sciences, and Rural Development Administration, Republic of Korea.
- Project PJ0140182018 National Institute of Agricultural Sciences, and Rural Development Administration, Republic of Korea.
- Project PJ0140182018 National Institute of Agricultural Sciences, and Rural Development Administration, Republic of Korea.
- Project PJ0140182018 National Institute of Agricultural Sciences, and Rural Development Administration, Republic of Korea.
- Project PJ0140182018 National Institute of Agricultural Sciences, and Rural Development Administration, Republic of Korea.
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Affiliation(s)
- Zhaochi Zhai
- Qingdao Agricultural University, Chengyang, Qingdao City, China
| | - Min Meng
- Qingdao Agricultural University, Chengyang, Qingdao City, China
| | - Zhenxing Zhang
- Qingdao Agricultural University, Chengyang, Qingdao City, China
| | | | - Yongzhe Zhu
- Qingdao Agricultural University, Chengyang, Qingdao City, China.
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2
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Qi L, Xiao X, Liu T, Ren Z, Ren W, Gao Q, Liu M, Wei P, Lai Y, Yao W, An H, Zhang L, Li C, Luo S, Luo X. Functionally responsive hydrogels with salt-alkali sensitivity effectively target soil amelioration. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 918:170350. [PMID: 38307264 DOI: 10.1016/j.scitotenv.2024.170350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 12/28/2023] [Accepted: 01/19/2024] [Indexed: 02/04/2024]
Abstract
The long-standing crisis of soil salinization and alkalization poses a significant challenge to global agricultural development. High soil salinity-alkalinity, water dispersion, and nutrient loss present major hurdles to soil improvement. Novel environmentally friendly gels have demonstrated excellent water retention and slow-release capabilities in agricultural enhancement. However, their application for improving saline-alkali soil is both scarce and competitive. This study proposes a new strategy for regulating saline-alkali soil using gel-coated controlled-release soil modifiers (CWR-SRMs), where radical-polymerized gels are embedded on the surface of composite gel beads through spray coating. Characterization and performance analysis reveal that the three-dimensional spatial network structure rich in hydrophilic groups exhibits good thermal stability (first-stage weight loss temperature of 257.7 °C in thermogravimetric analysis) and encapsulation efficiency for fulvic acid‑potassium (FA-K), which can enhance soil quality in saline-alkali environments. The molecular chain relaxation under saline-alkali conditions promotes a synergistic effect of swelling and slow release, endowing it with qualifications as a water reservoir, Ca2+ source unit, and slow-release body. The results of a 6 weeks incubation experiment on 0-20 cm saline-alkaline soil with different application gradients showed that the gradient content had a significant effect on the soil improvement effect. Specifically, the T2 (the dosage accounted for 1 % of soil mass) treatment significantly increases water retention (30 % ~ 90 %), and nutrient levels (30 % ~ 50 %), while significantly decreasing soil sodium colloid content (30 % ~ 60 %) and soil pH (10 % ~ 15 %). Furthermore, PCA analysis indicates that the addition of 1 % CWR-SRMs as amendments can significantly adjust the negative aspects of soil salinity and alkalinity. This highlights the excellent applicability of CWR-SRMs in improving saline-alkali agricultural ecosystems, demonstrating the potential value of novel environmentally friendly gels as an alternative solution for soil challenges persistently affected by adverse salinity and alkalinity.
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Affiliation(s)
- Le Qi
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China; National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resources Utilization, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Xiao Xiao
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China; National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resources Utilization, Nanchang Hangkong University, Nanchang 330063, PR China.
| | - Ting Liu
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China; National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resources Utilization, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Zhong Ren
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China; National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resources Utilization, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Wei Ren
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China; National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resources Utilization, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Qifeng Gao
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China; Institute for Total and Utilization of Resources, China Nonusferr Metals (Guilin) Geology and Mining Co., Ltd., Guilin 541004, China
| | - Mengting Liu
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China; National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resources Utilization, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Pangzhi Wei
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China; National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resources Utilization, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Yongkang Lai
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China; National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resources Utilization, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Weipeng Yao
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China; National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resources Utilization, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Huanhuan An
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China; National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resources Utilization, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Lan Zhang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China; National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resources Utilization, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Chuncheng Li
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China; National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resources Utilization, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Shenglian Luo
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China; National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resources Utilization, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Xubiao Luo
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China; Key Laboratory of Jiangxi Province for agricultural environmental pollution prevention and control in red soil hilly region, School of life sciences, Jinggangshan University, Ji'an 343009, China.
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Wang Y, Pang C, Mohammad-Beigi H, Li X, Wu Y, Lin MKTH, Bai Y, Møller MS, Svensson B. Sequential starch modification by branching enzyme and 4-α-glucanotransferase improves retention of curcumin in starch-alginate beads. Carbohydr Polym 2024; 323:121387. [PMID: 37940281 DOI: 10.1016/j.carbpol.2023.121387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 08/30/2023] [Accepted: 09/11/2023] [Indexed: 11/10/2023]
Abstract
A new super-branched amylopectin with longer exterior chains was produced from normal maize starch by modification with branching enzyme followed by 4-α-glucanotransferase, and applied for co-entrapment of a curcumin-loaded emulsion in alginate beads. The network structure of the gel beads was obtained with Ca2+-cross-linked alginate and a modest load of retrograded starch. The dual enzyme modified starch contained more and longer α-1,6-linked branch chains than single enzyme modified and unmodified starches and showed superior resistance to digestive enzymes. Alginate beads with or without starch were of similar size (1.69-1.74 mm), but curcumin retention was improved 1.4-2.8-fold in the presence of different starches. Thus, subjecting the curcumin-loaded beads to in vitro simulated gastrointestinal digestion resulted in retention of 70, 43 and 22 % of the curcumin entrapped in the presence of modified, unmodified, or no starch, respectively. Molecular docking provided support for curcumin interacting with starch via hydrogen bonding, hydrophobic contacts and π-π stacking. The study highlights the potential of utilizing low concentration of dual-enzyme modified starch with alginate to create a versatile vehicle for controlled release and targeted delivery of bioactive compounds.
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Affiliation(s)
- Yu Wang
- Enzyme and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Chengfang Pang
- Research Group for Genomic Epidemiology, National Food Institute, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
| | - Hossein Mohammad-Beigi
- Enzyme and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Xiaoxiao Li
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Yazhen Wu
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Marie Karen Tracy Hong Lin
- National Center for Nanofabrication and Characterization, Technical University of Denmark, Kgs. Lyngby DK-2800, Denmark
| | - Yuxiang Bai
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Marie Sofie Møller
- Applied Molecular Enzyme Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.
| | - Birte Svensson
- Enzyme and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.
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Zhu H, Kulyar MFEA, Ding Y, Yao W, Mo Q, Li J. Ginsenoside Rg1 regulates thiram-induced chondrocytes' apoptosis and angiogenesis in broiler chickens. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:34188-34202. [PMID: 36508105 DOI: 10.1007/s11356-022-24598-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 12/01/2022] [Indexed: 06/18/2023]
Abstract
Tibial dyschondroplasia (TD) is a developmental cartilaginous disease due to thiram toxicity. The abnormity of chondrocytes and insufficient angiogenesis within the growth plate are the major factors leading to the occurrence of TD in most cases. In the current study, we evaluated the beneficial effects of ginsenoside (Rg1) against thiram-induced TD for knowing the possible underlying mechanisms in broiler chickens through in vivo and in vitro assessment. Arbor acres broilers (1-day-old, n = 120) were randomly divided for the in vivo evaluation. The control broilers were fed under normal conditions during the whole experiment cycle (18 days). The TD broilers were fed with 50 mg/kg thiram, while the treatment group was given 40 mg/kg of Rg1. According to our findings, thiram caused a decrease in production performance and tibia parameters (p < 0.05), which were significantly reversed by Rg1 administration. In addition, the results from the histological evaluation showed that the proliferative zone had a smaller number of blood vessels, surrounded by inviable chondrocytes, proving apoptosis during the occurrence of TD, while Rg1 treatment significantly increased blood vessels and decreased apoptotic cells. Furthermore, it was found that Rg1 effectively ameliorated the angiogenesis by regulation of HIF-1α/VEGFA/VEGFR2 signaling pathway and the chondrocytes' apoptosis via the mitochondrial pathway. Hence, these findings suggest that Rg1 might be a perfect choice in the prevention and treatment of TD via regulating chondrocytes apoptosis and angiogenesis. Also, it might be a potential therapeutic drug for humans to overcome different bone disorders, involving chondrocytes.
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Affiliation(s)
- Huaisen Zhu
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Muhammad Fakhar-E-Alam Kulyar
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Yanmei Ding
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Wangyuan Yao
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Quan Mo
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Jiakui Li
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China.
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5
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Kumar R, Kumar N, Rajput VD, Mandzhieva S, Minkina T, Saharan BS, Kumar D, Sadh PK, Duhan JS. Advances in Biopolymeric Nanopesticides: A New Eco-Friendly/Eco-Protective Perspective in Precision Agriculture. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:nano12223964. [PMID: 36432250 PMCID: PMC9692690 DOI: 10.3390/nano12223964] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 10/27/2022] [Accepted: 11/03/2022] [Indexed: 05/26/2023]
Abstract
Pesticides are essential to contemporary agriculture and are required to safeguard plants from hazardous pests, diseases, and weeds. In addition to harming the environment, overusing these pesticides causes pests to become resistant over time. Alternative methods and agrochemicals are therefore required to combat resistance. A potential solution to pesticide resistance and other issues may be found in nanotechnology. Due to their small size, high surface-area-to-volume ratio, and ability to offer novel crop protection techniques, nanoformulations, primarily biopolymer-based ones, can address specific agricultural concerns. Several biopolymers can be employed to load pesticides, including starch, cellulose, chitosan, pectin, agar, and alginate. Other biopolymeric nanomaterials can load pesticides for targeted delivery, including gums, carrageenan, galactomannans, and tamarind seed polysaccharide (TSP). Aside from presenting other benefits, such as reduced toxicity, increased stability/shelf life, and improved pesticide solubility, biopolymeric systems are also cost-effective; readily available; biocompatible; biodegradable; and biosafe (i.e., releasing associated active compounds gradually, without endangering the environment) and have a low carbon footprint. Additionally, biopolymeric nanoformulations support plant growth while improving soil aeration and microbial activity, which may favor the environment. The present review provides a thorough analysis of the toxicity and release behavior of biopolymeric nanopesticides for targeted delivery in precision crop protection.
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Affiliation(s)
- Ravinder Kumar
- Department of Biotechnology, Chaudhary Devi Lal University, Sirsa 125055, India
| | - Naresh Kumar
- Regional Forensic Science Laboratory, Mandi 175002, India
| | - Vishnu D. Rajput
- Academy of Biology, and Biotechnology, Southern Federal University, 344090 Rostov-on-Don, Russia
| | - Saglara Mandzhieva
- Academy of Biology, and Biotechnology, Southern Federal University, 344090 Rostov-on-Don, Russia
| | - Tatiana Minkina
- Academy of Biology, and Biotechnology, Southern Federal University, 344090 Rostov-on-Don, Russia
| | - Baljeet Singh Saharan
- Department of Microbiology, CCS Haryana Agricultural University, Hisar 125004, India
| | | | - Pardeep Kumar Sadh
- Department of Biotechnology, Chaudhary Devi Lal University, Sirsa 125055, India
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6
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Supare K, Mahanwar PA. Starch-derived superabsorbent polymers in agriculture applications: an overview. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-021-03842-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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7
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Feng J, Dou J, Wu W. Development of biochar-impregnated alginate beads for the delivery of biocontrol agents for peanut aflatoxin. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2022; 39:1487-1500. [PMID: 35679201 DOI: 10.1080/19440049.2022.2085888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The competitive inhibition of aflatoxigenic fungi by non-aflatoxigenic Aspergillus flavus has proved to be an effective method to prevent and control peanut aflatoxin contamination, and most of the currently used inoculum carriers are grains. In this study, the reliability and efficiency of replacing grain kernels with novel chitosan-coated alginate-poly(N-isopropylacrylamide) (PNIPAAm) beads impregnated with biochar (CSACB) were evaluated. Characterisation of the beads was performed by SEM, thermogravimetry analysis (TGA), and swelling properties analyses. The optimised CSACB beads had good physical stability, shelf life, and entrapment efficiency. In addition, the water-holding capacity and porous structure were excellent, as the biochar provided a beneficial microenvironment for the attachment and microbial growth of the biocontrol fungus. The effect of reducing aflatoxin in peanuts was verified experimentally. Collectively, the novel CSACB beads are suitable carriers of non-aflatoxigenic A. flavus for the biocontrol of peanut aflatoxin.
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Affiliation(s)
- Jiachang Feng
- School of Grain Science and Technology, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Jianpeng Dou
- Department of Biological and Agricultural Engineering, Jilin University, Changchun, China
| | - Wenfu Wu
- Department of Biological and Agricultural Engineering, Jilin University, Changchun, China
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Khoshdouni Farahani Z, Mousavi M, Seyedain Ardebili SM, Bakhoda H. Modification of sodium alginate by octenyl succinic anhydride to fabricate beads for encapsulating jujube extract. Curr Res Food Sci 2022; 5:157-166. [PMID: 35072103 PMCID: PMC8761605 DOI: 10.1016/j.crfs.2021.11.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 11/20/2021] [Accepted: 11/23/2021] [Indexed: 10/25/2022] Open
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Vallières C, Alexander C, Avery SV. Potentiated inhibition of Trichoderma virens and other environmental fungi by new biocide combinations. Appl Microbiol Biotechnol 2021; 105:2867-2875. [PMID: 33738552 PMCID: PMC8007513 DOI: 10.1007/s00253-021-11211-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 02/06/2021] [Accepted: 02/28/2021] [Indexed: 12/04/2022]
Abstract
Abstract Fungi cause diverse, serious socio-economic problems, including biodeterioration of valuable products and materials that spawns a biocides industry worth ~$11 billion globally. To help combat environmental fungi that commonly colonise material products, this study tested the hypothesis that combination of an approved fungicide with diverse agents approved by the FDA (Food and Drug Administration) could reveal potent combinatorial activities with promise for fungicidal applications. The strategy to use approved compounds lowers potential development risks for any effective combinations. A high-throughput assay of 1280 FDA-approved compounds was conducted to find those that potentiate the effect of iodopropynyl-butyl-carbamate (IPBC) on the growth of Trichoderma virens; IPBC is one of the two most widely used Biocidal Products Regulations–approved fungicides. From this library, 34 compounds in combination with IPBC strongly inhibited fungal growth. Low-cost compounds that gave the most effective growth inhibition were tested against other environmental fungi that are standard biomarkers for resistance of synthetic materials to fungal colonisation. Trifluoperazine (TFZ) in combination with IPBC enhanced growth inhibition of three of the five test fungi. The antifungal hexetidine (HEX) potentiated IPBC action against two of the test organisms. Testable hypotheses on the mechanisms of these combinatorial actions are discussed. Neither IPBC + TFZ nor IPBC + HEX exhibited a combinatorial effect against mammalian cells. These combinations retained strong fungal growth inhibition properties after incorporation to a polymer matrix (alginate) with potential for fungicide delivery. The study reveals the potential of such approved compounds for novel combinatorial applications in the control of fungal environmental opportunists. Key points • Search with an approved fungicide to find new fungicidal synergies in drug libraries. • New combinations inhibit growth of key environmental fungi on different matrices. • The approach enables a more rapid response to demand for new biocides. Supplementary Information The online version contains supplementary material available at 10.1007/s00253-021-11211-3.
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Affiliation(s)
- Cindy Vallières
- School of Life Sciences, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Cameron Alexander
- School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Simon V Avery
- School of Life Sciences, University of Nottingham, University Park, Nottingham, NG7 2RD, UK.
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Zafeiri I, Beri A, Linter B, Norton I. Mechanical properties of starch-filled alginate gel particles. Carbohydr Polym 2021; 255:117373. [PMID: 33436205 DOI: 10.1016/j.carbpol.2020.117373] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 10/30/2020] [Accepted: 10/30/2020] [Indexed: 11/25/2022]
Abstract
The aim of this work was to investigate the mechanical behaviour of alginate-based composite particles. Alginate gel beads with entrapped starch were used as the replicates of storage cells of plant tissue. Beads were formulated using different ratios of both ingredients and were produced using two methods, resulting in particles in the macro- and micro-scale size range. Compression tests revealed an effect of bead size on mechanical properties and a dominant role of the alginate on the material properties. Starch was successfully encapsulated as native granules in the beads and once encompassed, it suffered restricted swelling, up to 45 % of its original size, after undergoing heating. Force versus displacement data were fitted to both an empirical and the Hertz model and Young's modulus was found to increase only with heated starch inclusions. Microscopy was deemed crucial for the interpretation of mechanical measurements.
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Affiliation(s)
- Ioanna Zafeiri
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK.
| | - Akash Beri
- PepsiCo International Ltd, 4 Leycroft Rd, Leicester, LE4 1ET, UK
| | - Bruce Linter
- PepsiCo International Ltd, 4 Leycroft Rd, Leicester, LE4 1ET, UK
| | - Ian Norton
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
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11
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Nair RV, Thomas RT, Mohamed A, Pillai S. Fluorescent turn-off sensor based on sulphur-doped graphene quantum dots in colloidal and film forms for the ultrasensitive detection of carbamate pesticides. Microchem J 2020. [DOI: 10.1016/j.microc.2020.104971] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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12
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Feltre G, Sartori T, Silva KFC, Dacanal GC, Menegalli FC, Hubinger MD. Encapsulation of wheat germ oil in alginate-gelatinized corn starch beads: Physicochemical properties and tocopherols' stability. J Food Sci 2020; 85:2124-2133. [PMID: 32579742 DOI: 10.1111/1750-3841.15316] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 04/13/2020] [Accepted: 05/06/2020] [Indexed: 11/27/2022]
Abstract
Microencapsulation by production of polymer beads from ionic gelation is a useful method to improve the stability of nutritional compounds. Wheat germ oil is a nutritional source of unsaturated fatty acids and phytonutrients, such as tocopherols (α and β), phytosterols, carotenoids, and phenolic compounds. This work studied the development of alginate-starch beads over the stability of encapsulated wheat germ oil. The beads contained sodium alginate and gelatinized corn starch in proportions of 2:0, 1:1, 1:2, and 1:4. The addition of small amounts (1:1) of gelatinized starch in the alginate emulsions improved the physicochemical properties and stability during storage. The emulsions had oil droplets with mean sizes ranging from 4.5 to 12.2 µm. The 1:1 samples showed more disperse oil droplets, explained by the molecular interaction between the starch chains and oil. The encapsulation efficiency was higher than 91%, and the beads' mean diameters were between 383.22 and 797.45 µm. The proportion of 1:1 alginate-starch also enhanced the beads' microstructures, avoiding oil oxidation. Six days accelerated stability (65 °C) evidenced higher tocopherols amounts (0.66 mg/g oil) and a lower oxidation (2.52 meq.O2 /kg oil) for the 1:1 samples compared to the remained samples. PRACTICAL APPLICATION: Alginate-gelatinized corn starch beads loaded with wheat germ oil can be used as an ingredient in functional food products for the enrichment of nutrients. The use of starch decreased the oil oxidation and the loss of tocopherols during storage, indicating that the quality of the wheat germ oil will be desirable for longer durations of food storage.
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Affiliation(s)
- Gabriela Feltre
- Department of Food Engineering, School of Food Engineering, University of Campinas, Campinas, SP, 13083-862, Brazil
| | - Tanara Sartori
- Department of Food Engineering, School of Food Engineering, University of Campinas, Campinas, SP, 13083-862, Brazil
| | - Klycia F C Silva
- Department of Food Engineering, School of Food Engineering, University of Campinas, Campinas, SP, 13083-862, Brazil
| | - Gustavo C Dacanal
- Department of Food Engineering, School of Animal Science and Food Engineering, University of São Paulo, Pirassununga, SP, 13635-900, Brazil
| | - Florencia C Menegalli
- Department of Food Engineering, School of Food Engineering, University of Campinas, Campinas, SP, 13083-862, Brazil
| | - Miriam D Hubinger
- Department of Food Engineering, School of Food Engineering, University of Campinas, Campinas, SP, 13083-862, Brazil
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13
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Alginate-based hydrogels modified with olive pomace and lignin to removal organic pollutants from aqueous solutions. Int J Biol Macromol 2020; 153:883-891. [PMID: 32171834 DOI: 10.1016/j.ijbiomac.2020.03.081] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 03/10/2020] [Accepted: 03/10/2020] [Indexed: 11/20/2022]
Abstract
In this study, new hybrid biopolymers based on alginate and low cost materials belong lignocellulose group such as lignin and olive pomace were used to removal organic pollutants. The organic carbon content, granule size, average mass, zero charge point, water uptake and swelling of the resulting alginate-based modified adsorbents were measured. The homogeneity, complexity and encapsulation viability of the novel biopolymers were studied by FT-IR, TGA and SEM. As model of emerging contaminants belong to glucocorticoids group prednisolone drug was selected. 3,4-dichloroaniline (3,4-DCA) was chosen as aniline derivate pollutant. The efficiency of the bioadsorbents to removal 3,4-dichloroaniline and prednisolone was performed by kinetic and equilibrium batch adsorption studies. The experimental data was found well correlated to the pseudo-second order kinetic model. The adsorption of 3,4-DCA and prednisolone was mainly affected by the organic carbon content of the bioadsorbent. A higher adsorption capacity was observed for lignin-alginate based bioadsorbents. The removal efficiency was higher than 90% for 3,4-DCA in all prepared bioadsorbents, reached up to 49% for prednisolone using the bioadsorbent with the higher lignin content. These results suggest the promising potential for the prepared eco-friendly bioadsorbents to removal organic pollutants from water, mainly for aniline derivate such as 3,4-DCA.
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Wang X, Tang D, Wang W. Characterization of Pseudomonas protegens SN15-2 microcapsule encapsulated with oxidized alginate and starch. INT J POLYM MATER PO 2020. [DOI: 10.1080/00914037.2020.1760270] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Xiaobing Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Danyan Tang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Wei Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
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15
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Quan Y, Yao J, Yang S, Chen L, Liu Y, Lang J, Zeng H, Yang J, Gao M. Detect, remove and re-use: Sensing and degradation pesticides via 3D tilted ZMRs/Ag arrays. JOURNAL OF HAZARDOUS MATERIALS 2020; 391:122222. [PMID: 32062540 DOI: 10.1016/j.jhazmat.2020.122222] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Revised: 01/30/2020] [Accepted: 02/01/2020] [Indexed: 06/10/2023]
Abstract
The objective of this study was to design a versatile and reusable pesticide detection surface-enhanced Raman scattering (SERS) substrate in combination with SERS enhancement and self-cleaning properties. In this paper, we present an inexpensive way to synthesize three-dimensional tilted ZnO micron rods with an Ag hierarchical structure (ZMRs/Ag arrays). Although expensive materials and complex methods were not used, the detection limit of thiram residue was 10-11 M, with a quantitative relationship (R2 = 0.9929) between the thiram concentration and the intensity of the SERS peaks. Additionally, the substrates exhibited fast and efficient photocatalytic activity for the degradation of adsorbed thiram, and the degradation rate in 30 min was close 100 % under visible-light irradiation. The enhancement and photocatalytic mechanism of this substrate were meticulously analyzed in detail. Furthermore, the residues of several mixed pesticides (e.g., thiram and methamidophos compounds) in various juices (such as grape, pear, orange, apple, and cherry juices) were quickly detected using ZMRs/Ag substrates. The main advantages of this substrate are recyclability, stability, selectivity, handiness, and cost-eff ;ectiveness. The substrate can prevent single-use problems associated with conventional SERS substrates and can be applied in pesticide residue and food security.
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Affiliation(s)
- Yingnan Quan
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun, 130103, PR China; National Demonstration Centre for Experimental Physics Education, Jilin Normal University, Siping, 136000, PR China; Key Laboratory of Preparation and Application of Environmental Friendly Materials, Jilin Normal University, Ministry of Education, Changchun, 130103, PR China
| | - Jiacheng Yao
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun, 130103, PR China; National Demonstration Centre for Experimental Physics Education, Jilin Normal University, Siping, 136000, PR China; Key Laboratory of Preparation and Application of Environmental Friendly Materials, Jilin Normal University, Ministry of Education, Changchun, 130103, PR China
| | - Shuo Yang
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130103, PR China
| | - Lei Chen
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun, 130103, PR China; National Demonstration Centre for Experimental Physics Education, Jilin Normal University, Siping, 136000, PR China; Key Laboratory of Preparation and Application of Environmental Friendly Materials, Jilin Normal University, Ministry of Education, Changchun, 130103, PR China
| | - Yang Liu
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun, 130103, PR China; National Demonstration Centre for Experimental Physics Education, Jilin Normal University, Siping, 136000, PR China; Key Laboratory of Preparation and Application of Environmental Friendly Materials, Jilin Normal University, Ministry of Education, Changchun, 130103, PR China
| | - Jihui Lang
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun, 130103, PR China; National Demonstration Centre for Experimental Physics Education, Jilin Normal University, Siping, 136000, PR China; Key Laboratory of Preparation and Application of Environmental Friendly Materials, Jilin Normal University, Ministry of Education, Changchun, 130103, PR China
| | - Huaqian Zeng
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun, 130103, PR China; National Demonstration Centre for Experimental Physics Education, Jilin Normal University, Siping, 136000, PR China; Key Laboratory of Preparation and Application of Environmental Friendly Materials, Jilin Normal University, Ministry of Education, Changchun, 130103, PR China
| | - Jinghai Yang
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun, 130103, PR China; National Demonstration Centre for Experimental Physics Education, Jilin Normal University, Siping, 136000, PR China; Key Laboratory of Preparation and Application of Environmental Friendly Materials, Jilin Normal University, Ministry of Education, Changchun, 130103, PR China
| | - Ming Gao
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun, 130103, PR China; National Demonstration Centre for Experimental Physics Education, Jilin Normal University, Siping, 136000, PR China; Key Laboratory of Preparation and Application of Environmental Friendly Materials, Jilin Normal University, Ministry of Education, Changchun, 130103, PR China.
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Feltre G, Almeida FS, Sato ACK, Dacanal GC, Hubinger MD. Alginate and corn starch mixed gels: Effect of gelatinization and amylose content on the properties and in vitro digestibility. Food Res Int 2020; 132:109069. [DOI: 10.1016/j.foodres.2020.109069] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 02/02/2020] [Accepted: 02/02/2020] [Indexed: 12/20/2022]
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17
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Guha T, Gopal G, Kundu R, Mukherjee A. Nanocomposites for Delivering Agrochemicals: A Comprehensive Review. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:3691-3702. [PMID: 32129992 DOI: 10.1021/acs.jafc.9b06982] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Excessive application of fertilizers negatively affects soil health, causes low nutrient utilization efficiency in plants, and leads to environmental pollution. The application of controlled-release fertilizer is gaining momentum to overcome this crisis. Engineered nanocomposites (ENCs) have shown tremendous promise for need-based delivery of agrochemicals (macro- and micronutrients, pesticides, and other agrochemicals). This review provides comprehensive coverage of synthesis of nanocomposites, their physical-chemical characterization, and techniques to achieve sustained release and targeted delivery to the crops, emphasizing their beneficial role in plant production and protection. Related aspects like feasibility of the application, commercialization of the nanoformulations, and biosafety concerns are also highlighted. This will be helpful to develop a critical understanding of the current state of the art in the controlled release of agrochemicals through nanocomposites. The pressing issues like scale up production, cost analyses, field-based trials, and environmental safety concerns should be given greater attention in future studies.
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Affiliation(s)
- Titir Guha
- Department of Botany, Centre of Advanced Studies, University of Calcutta, 35, Ballygunge Circular Road, Kolkata 700019, India
| | - Geetha Gopal
- Centre for Nanobiotechnology, VIT University, Vellore, Tamil Nadu 632014, India
| | - Rita Kundu
- Department of Botany, Centre of Advanced Studies, University of Calcutta, 35, Ballygunge Circular Road, Kolkata 700019, India
| | - Amitava Mukherjee
- Centre for Nanobiotechnology, VIT University, Vellore, Tamil Nadu 632014, India
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18
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Feng J, Dou J, Zhang Y, Wu Z, Yin D, Wu W. Thermosensitive Hydrogel for Encapsulation and Controlled Release of Biocontrol Agents to Prevent Peanut Aflatoxin Contamination. Polymers (Basel) 2020; 12:E547. [PMID: 32138229 PMCID: PMC7182945 DOI: 10.3390/polym12030547] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Revised: 02/12/2020] [Accepted: 02/14/2020] [Indexed: 12/11/2022] Open
Abstract
Starch, alginate, and poly(N-isopropylacrylamide) (PNIPAAm) were combined to prepare a semi-interpenetrating network (IPN) hydrogel with temperature sensitivity. Calcium chloride was used as cross-linking agent, the non-toxigenic Aspergillus flavus spores were successfully encapsulated as biocontrol agents by the method of ionic gelation. Characterization of the hydrogel was performed by Fourier-transform infrared spectroscopy (FTIR), scanning electron micrograph (SEM), and thermogravimetry analysis (TGA). Formulation characteristics, such as entrapment efficiency, beads size, swelling behavior, and rheological properties were evaluated. The optical and rheological measurements indicated that the lower critical solution temperature (LCST) of the samples was about 29-30 °C. TGA results demonstrated that the addition of kaolin could improve the thermal stability of the semi-IPN hydrogel. Morphological analysis showed a porous honeycomb structure on the surface of the beads. According to the release properties of the beads, the semi-IPN hydrogel beads containing kaolin not only have the effect of slow release before peanut flowering, but they also can rapidly release biocontrol agents after flowering begins. The early flowering stage of the peanut is the critical moment to apply biocontrol agents. Temperature-sensitive hydrogel beads containing kaolin could be considered as carriers of biocontrol agents for the control of aflatoxin in peanuts.
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Affiliation(s)
| | | | | | | | | | - Wenfu Wu
- Department of Biological and Agricultural Engineering, Jilin University, Changchun 130000, China; (J.F.); (J.D.); (Y.Z.); (Z.W.); (D.Y.)
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19
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Huang Y, Dan N, Dan W, Zhao W. Reinforcement of Polycaprolactone/Chitosan with Nanoclay and Controlled Release of Curcumin for Wound Dressing. ACS OMEGA 2019; 4:22292-22301. [PMID: 31909312 PMCID: PMC6941175 DOI: 10.1021/acsomega.9b02217] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Accepted: 12/05/2019] [Indexed: 05/27/2023]
Abstract
A novel clay-reinforced polycaprolactone/chitosan/curcumin (PCl/CS/Clay/Cur) composite film was fabricated in this study. The prepared Cur-loading composite films were characterized with attenuated total reflection Fourier transformed infrared spectroscopy, scanning electron microscopy, atomic force microscopy, water contact angle, differential scanning calorimetry, thermogravimetric analysis, and X-ray diffraction, and the results showed good dispersion of clay in the composite films. The addition of nanoclay was found to significantly increase the tensile strength. Also, the clay-enhanced drug-loading films exhibited better controlled-release profiles of Cur than those membranes without clay. Skin disinfection test demonstrated that the curcumin-loaded film could protect wound from bacterial infection. Cytotoxicity analysis proved the good biocompatibility of the composite films. The clay-enhanced Cur-loading films might be promising candidates for wound care.
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Affiliation(s)
- Yanping Huang
- College
of Biomass Science and Engineering, Key Laboratory for Leather
Chemistry and Engineering of the Education Ministry, Research Center of Biomedical Engineering, and College of Polymer
Science and Engineering, State Key Laboratory of Polymer Materials
Engineering, Sichuan University, Chengdu 610065, China
| | - Nianhua Dan
- College
of Biomass Science and Engineering, Key Laboratory for Leather
Chemistry and Engineering of the Education Ministry, Research Center of Biomedical Engineering, and College of Polymer
Science and Engineering, State Key Laboratory of Polymer Materials
Engineering, Sichuan University, Chengdu 610065, China
| | - Weihua Dan
- College
of Biomass Science and Engineering, Key Laboratory for Leather
Chemistry and Engineering of the Education Ministry, Research Center of Biomedical Engineering, and College of Polymer
Science and Engineering, State Key Laboratory of Polymer Materials
Engineering, Sichuan University, Chengdu 610065, China
| | - Weifeng Zhao
- College
of Biomass Science and Engineering, Key Laboratory for Leather
Chemistry and Engineering of the Education Ministry, Research Center of Biomedical Engineering, and College of Polymer
Science and Engineering, State Key Laboratory of Polymer Materials
Engineering, Sichuan University, Chengdu 610065, China
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20
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Huang Y, Hu Q, Cui G, Guo X, Wei B, Gan C, Li W, Mo D, Lu R, Cui J. Release-controlled microcapsules of thiamethoxam encapsulated in beeswax and their application in field. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2019; 55:342-354. [PMID: 31790325 DOI: 10.1080/03601234.2019.1697588] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Using beeswax as wrapping matrix, two types of release-controlled TM (thiamethoxam)/BK(beeswax-kaolin) microcapsules were prepared by adsorbing TM on kaolin and then encapsulated with beeswax, or directly wrapping TM with beeswax. The structure and morphology of the TM/BK microcapsules were characterized. The effects of different preparation methods, the particle size, pH conditions and different additives on the release property of the TM/BK microcapsules were investigated in water and soil column to compare the advantages of the two approaches. Finally, the insecticidal effect of the TM/BK microcapsules against sugarcane borer and rice planthopper was tested. The results show that the TM/BK microcapsules have a better sustained-release in both water and soil, and the release rate is different under different pH conditions. In addition, the releasing time of the TM/BK microcapsules can be modified by different preparation methods and combination of different additives. In the field applications, the insecticidal activity of the TM/BK microcapsules was better than that of non-sustained control group. Especially in the rice field test, 45 days after the application, the control group lost the activity against rice planthopper because of drug loss, whereas the TM/BK microcapsule group still retained about 90% of the insecticidal activity. The results suggest that the microcapsules have better agricultural application for insect control.
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Affiliation(s)
- Yanmin Huang
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning, PR China
| | - Qiang Hu
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning, PR China
| | - Guoqin Cui
- Guangxi Tianyuan Biochemical Co. Ltd, Nanning, PR China
| | - Xiaoyan Guo
- Guangxi Tianyuan Biochemical Co. Ltd, Nanning, PR China
| | - Bangzhi Wei
- Guangxi Tianyuan Biochemical Co. Ltd, Nanning, PR China
| | - Chunfang Gan
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning, PR China
| | - Weiguo Li
- Guangxi Tianyuan Biochemical Co. Ltd, Nanning, PR China
| | - Dongmei Mo
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning, PR China
| | - Rui Lu
- Guangxi Tianyuan Biochemical Co. Ltd, Nanning, PR China
| | - Jianguo Cui
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning, PR China
- College of petroleum and chemical Engineering, Beibuwan University, Qinzhou, PR China
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21
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Mechanical and slow-released property of poly(acrylamide) hydrogel reinforced by diatomite. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 99:315-321. [DOI: 10.1016/j.msec.2019.01.109] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 01/09/2019] [Accepted: 01/24/2019] [Indexed: 12/18/2022]
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22
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Feng J, Dou J, Wu Z, Yin D, Wu W. Controlled Release of Biological Control Agents for Preventing Aflatoxin Contamination from Starch⁻Alginate Beads. Molecules 2019; 24:E1858. [PMID: 31091816 PMCID: PMC6572238 DOI: 10.3390/molecules24101858] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Revised: 05/02/2019] [Accepted: 05/07/2019] [Indexed: 11/30/2022] Open
Abstract
For the wise use of fungal biocontrol and metalaxyl fungicide, starch-alginate-based formulations have been developed by encapsulating metalaxyl and non-toxigenic Aspergillus flavus spores simultaneously in the form of microspheres using calcium chloride as a cross-linking agent. The formulations were characterized by Fourier transform infrared spectroscopy (FTIR), a scanning electron micrograph (SEM), and thermogravimetry (TGA). Formulation characteristics, including the bead size, entrapment efficiency, swelling ratio of the beads, and rheological properties, were analyzed. The release behavior of beads with different formulations was evaluated. The addition of kaolin and rice husk powder in starch-alginate beads retarded the release profile of spores and metalaxyl. The release of the active ingredient from starch-alginate-kaolin beads and starch-alginate-rice husk powder beads occurred in both a controlled and sustained manner. Additionally, the release rate decreased with the increase of kaolin or rice husk powder content. The beads added with kaolin were slower than the release of rice husk powder. In comparison, spores released slower and lasted longer than metalaxyl. The starch-alginate-kaolin formulations could be used as controlled release material in the field of biocontrol and reduce the harm of fungicides to the environment.
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Affiliation(s)
- Jiachang Feng
- Department of Biological and Agricultural Engineering, Jilin University, Changchun 130000, China.
| | - Jianpeng Dou
- Department of Biological and Agricultural Engineering, Jilin University, Changchun 130000, China.
| | - Zidan Wu
- Department of Biological and Agricultural Engineering, Jilin University, Changchun 130000, China.
| | - Dongxue Yin
- Department of Biological and Agricultural Engineering, Jilin University, Changchun 130000, China.
| | - Wenfu Wu
- Department of Biological and Agricultural Engineering, Jilin University, Changchun 130000, China.
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23
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Khlibsuwan R, Tansena W, Pongjanyakul T. Modification of alginate beads using gelatinized and ungelatinized arrowroot (Tacca leontopetaloides L. Kuntze) starch for drug delivery. Int J Biol Macromol 2018; 118:683-692. [DOI: 10.1016/j.ijbiomac.2018.06.118] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 06/15/2018] [Accepted: 06/24/2018] [Indexed: 01/02/2023]
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24
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Mohammadi N, Ehsani MR, Bakhoda H. Development of caffeine-encapsulated alginate-based matrix combined with different natural biopolymers, and evaluation of release in simulated mouth conditions. FLAVOUR FRAG J 2018. [DOI: 10.1002/ffj.3452] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Nima Mohammadi
- Department of Food Science and Technology, Science and Research Branch; Islamic Azad University; Tehran Iran
| | - Mohammad Reza Ehsani
- Department of Food Science and Technology, Science and Research Branch; Islamic Azad University; Tehran Iran
| | - Hossein Bakhoda
- Department of Agricultural Mechanization, Science and Research Branch; Islamic Azad University; Tehran Iran
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25
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Kaziem AE, Gao Y, He S, Li J. Synthesis and Insecticidal Activity of Enzyme-Triggered Functionalized Hollow Mesoporous Silica for Controlled Release. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:7854-7864. [PMID: 28809107 DOI: 10.1021/acs.jafc.7b02560] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
In the present study, enzymatic responsive controlled release formulations (CRFs) were fabricated. The CRFs were achieved by anchoring mechanically interlocked molecules using α-cyclodextrin onto the surface pore rims of hollow mesoporous silica (HMS). The CRFs were characterized using Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, and thermogravimetric analysis. The results showed that the CRFs had extraordinary loading ability for chlorantraniliprole (42% w/w) and could effectively preserve chlorantraniliprole against degradation under thermal conditions and UV radiation. The CRFs have been proven to be enzyme-sensitive. The release ratio of chlorantraniliprole from CRFs can be accelerated observably when external α-amylase was introduced. The persistence of CRFs was evaluated by regular sampling feeding experiment using Plutella xylostella as the target insect. The results showed that the larval mortality of P. xylostella was much higher than that of Coragen under all concentrations after 14 days, which proved that CRFs had remarkable persistence.
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Affiliation(s)
- Amir E Kaziem
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University , Wuhan 430070, China
- Department of Environmental Agricultural Science, Institute of Environmental Studies and Research, Ain Shams University , Cairo 11566, Egypt
| | - Yunhao Gao
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University , Wuhan 430070, China
| | - Shun He
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University , Wuhan 430070, China
| | - Jianhong Li
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University , Wuhan 430070, China
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26
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Przyklenk M, Vemmer M, Hanitzsch M, Patel A. A bioencapsulation and drying method increases shelf life and efficacy of Metarhizium brunneum conidia. J Microencapsul 2017; 34:498-512. [PMID: 28699822 DOI: 10.1080/02652048.2017.1354941] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
This study reports the development of encapsulated and dried entomopathogenic fungus Metarhiuzm brunneum with reduced conidia content, increased conidiation, a high drying survival and enhanced shelf life. Dried beads prepared with the fillers corn starch, potato starch, carboxymethylcellulose or autoclaved baker's yeast, showed enhanced survival with increasing filler content. The maximum survival of 82% was found for beads with 20% corn starch at <0.1 water activity. While increasing starch content inhibits the conidiation, autoclaved baker's yeast and a combination with starch enhanced the conidiation to 1.0 × 108 conidia/bead. Beads with conidia content reduced to 0.01% multiplied conidia in a "microfermentation" by the factor 1000. A bioassay confirmed that conidia formed from rehydrated beads were virulent against Tenebrior molitor larvae. After six months of storage, encapsulated conidia showed improved shelf life compared to non-formulated conidia. This "microfermenter" will pave the way for encapsulated fungi to be used as cost-effective biocontrol agents.
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Affiliation(s)
- Michael Przyklenk
- a Faculty of Engineering and Mathematics, WG Fermentation and Formulation of Biologicals and Chemicals , University of Applied Sciences , Bielefeld , Germany
| | - Marina Vemmer
- a Faculty of Engineering and Mathematics, WG Fermentation and Formulation of Biologicals and Chemicals , University of Applied Sciences , Bielefeld , Germany
| | - Miriam Hanitzsch
- a Faculty of Engineering and Mathematics, WG Fermentation and Formulation of Biologicals and Chemicals , University of Applied Sciences , Bielefeld , Germany
| | - Anant Patel
- a Faculty of Engineering and Mathematics, WG Fermentation and Formulation of Biologicals and Chemicals , University of Applied Sciences , Bielefeld , Germany
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27
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Malagurski I, Levic S, Pantic M, Matijasevic D, Mitric M, Pavlovic V, Dimitrijevic-Brankovic S. Synthesis and antimicrobial properties of Zn-mineralized alginate nanocomposites. Carbohydr Polym 2017; 165:313-321. [PMID: 28363555 DOI: 10.1016/j.carbpol.2017.02.064] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 01/25/2017] [Accepted: 02/16/2017] [Indexed: 02/02/2023]
Abstract
New bioactive and antimicrobial biomaterials were produced by alginate-mediated biomineralization with Zn-mineral phase. The synthesis procedure is simple, cost-effective and resulted in two different Zn-mineralized alginate nanocomposites, Zn-carbonate/Zn-alginate and Zn-phosphate/Zn-alginate. The presence of Zn-mineral phase and its type, have significantly affected nanocomposite morphology, stability, total metallic loading and potential to release Zn(II) in physiological environment. Antimicrobial experiments showed that both types of Zn-mineralized nanocomposites exhibit strong antimicrobial effect against Escherichia coli, Staphylococcus aureus and Candida albicans. These results suggest that alginate biomineralization, where minerals are salts of essential metallic ions like Zn(II), represents a good strategy for designing multifunctional biomaterials for potential biomedical applications.
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Affiliation(s)
- Ivana Malagurski
- Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000 Belgrade, Serbia.
| | - Steva Levic
- Faculty of Agriculture, University of Belgrade, Nemanjina 6, 11000 Belgrade, Serbia
| | - Milena Pantic
- Faculty of Agriculture, University of Belgrade, Nemanjina 6, 11000 Belgrade, Serbia
| | - Danka Matijasevic
- Faculty of Agriculture, University of Belgrade, Nemanjina 6, 11000 Belgrade, Serbia
| | - Miodrag Mitric
- Vinca Institute of Nuclear Science, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia
| | - Vladimir Pavlovic
- Faculty of Agriculture, University of Belgrade, Nemanjina 6, 11000 Belgrade, Serbia
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Badawy ME, Taktak NE, Awad OM, Elfiki SA, El-Ela NEA. Evaluation of released malathion and spinosad from chitosan/alginate/gelatin capsules against Culex pipiens larvae. Res Rep Trop Med 2016; 7:23-38. [PMID: 30050337 PMCID: PMC6028061 DOI: 10.2147/rrtm.s108881] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Efficacy of spinosad and malathion loaded in eco-friendly biodegradable formulations was evaluated for controlling Culex pipiens larvae. Malathion (organophosphorus larvicide) and spinosad (naturally derived insecticide) were loaded on chitosan/alginate/gelatin capsules. Capsules were characterized by size measurement, scanning electron microscopy, Fourier transform infrared spectroscopy, and water uptake. In vitro release kinetics of the larvicides was studied in the running and stagnant water. Biochemical studies on the larvae treated with technical and formulated insecticides were also demonstrated. The results indicated that the released spinosad was active for a long time up to 48 and 211 days in the running and stagnant water, respectively. However, the capsules loaded with malathion showed larvicidal activity for 20 and 27 days in the running and stagnant water, respectively. Technical and formulated malathion and spinosad had an inhibition effect on acetylcholinesterase, carboxylesterase, and glutathione S-transferase. The results proved that the prepared capsules consisting of biodegradable polymers containing larvicides could be effective as controlled-release formulation against C. pipiens larvae for a long period.
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Affiliation(s)
- Mohamed Ei Badawy
- Department of Pesticide Chemistry and Technology, Faculty of Agriculture
| | - Nehad Em Taktak
- Department of Tropical Health, High Institute of Public Health, Alexandria University, Alexandria, Egypt
| | - Osama M Awad
- Department of Tropical Health, High Institute of Public Health, Alexandria University, Alexandria, Egypt
| | - Souraya A Elfiki
- Department of Tropical Health, High Institute of Public Health, Alexandria University, Alexandria, Egypt
| | - Nadia E Abou El-Ela
- Department of Tropical Health, High Institute of Public Health, Alexandria University, Alexandria, Egypt
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Preparation of uniform starch microcapsules by premix membrane emulsion for controlled release of avermectin. Carbohydr Polym 2016; 136:341-9. [DOI: 10.1016/j.carbpol.2015.09.050] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 09/14/2015] [Accepted: 09/15/2015] [Indexed: 11/20/2022]
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Zia F, Zia KM, Zuber M, Kamal S, Aslam N. Starch based polyurethanes: A critical review updating recent literature. Carbohydr Polym 2015; 134:784-98. [DOI: 10.1016/j.carbpol.2015.08.034] [Citation(s) in RCA: 106] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Revised: 08/11/2015] [Accepted: 08/12/2015] [Indexed: 01/28/2023]
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Polymeric and Solid Lipid Nanoparticles for Sustained Release of Carbendazim and Tebuconazole in Agricultural Applications. Sci Rep 2015; 5:13809. [PMID: 26346969 PMCID: PMC4561881 DOI: 10.1038/srep13809] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Accepted: 08/06/2015] [Indexed: 01/11/2023] Open
Abstract
Carbendazim (MBC) (methyl-2-benzimidazole carbamate) and tebuconazole (TBZ) ((RS)-1-(4-chlorophenyl)-4,4-dimethyl-3-(1H-1,2,4-triazol-1-ylmethyl)pentan-3-ol) are widely used in agriculture for the prevention and control of fungal diseases. Solid lipid nanoparticles and polymeric nanocapsules are carrier systems that offer advantages including changes in the release profiles of bioactive compounds and their transfer to the site of action, reduced losses due to leaching or degradation, and decreased toxicity in the environment and humans. The objective of this study was to prepare these two types of nanoparticle as carrier systems for a combination of TBZ and MBC, and then investigate the release profiles of the fungicides as well as the stabilities and cytotoxicities of the formulations. Both nanoparticle systems presented high association efficiency (>99%), indicating good interaction between the fungicides and the nanoparticles. The release profiles of MBC and TBZ were modified when the compounds were loaded in the nanoparticles, and cytotoxicity assays showed that encapsulation of the fungicides decreased their toxicity. These fungicide systems offer new options for the treatment and prevention of fungal diseases in plants.
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32
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Alginate based polyurethanes: A review of recent advances and perspective. Int J Biol Macromol 2015; 79:377-87. [DOI: 10.1016/j.ijbiomac.2015.04.076] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2015] [Revised: 04/25/2015] [Accepted: 04/28/2015] [Indexed: 11/19/2022]
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Starch-based hydrogel loading with carbendazim for controlled-release and water absorption. Carbohydr Polym 2015; 125:376-83. [DOI: 10.1016/j.carbpol.2015.03.004] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Revised: 03/02/2015] [Accepted: 03/03/2015] [Indexed: 01/24/2023]
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34
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Zhang B, Zhang T, Wang Q, Ren T. Microorganism-based monodisperse microcapsules: encapsulation of the fungicide tebuconazole and its controlled release properties. RSC Adv 2015. [DOI: 10.1039/c5ra01629k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A controlled release system was prepared, it based on UF modified PCC cells in which TEB are loaded into cells. It can control the drug release rate, depress the initial “burst effect”, and was efficacious in controlling wheat powdery mildew.
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Affiliation(s)
- Bo Zhang
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering/Key Laboratory of Green Pesticide and Agricultural Bioengineering
- Ministry of Education
- Guizhou University
- Guiyang
- P. R. China
| | - Teng Zhang
- The Key Laboratory of Resource Chemistry of Ministry of Education
- The Development Centre of Plant Germplasm Resources
- College of Life and Environmental Science
- Shanghai Normal University
- Shanghai
| | - Quanxi Wang
- The Key Laboratory of Resource Chemistry of Ministry of Education
- The Development Centre of Plant Germplasm Resources
- College of Life and Environmental Science
- Shanghai Normal University
- Shanghai
| | - Tianrui Ren
- The Key Laboratory of Resource Chemistry of Ministry of Education
- The Development Centre of Plant Germplasm Resources
- College of Life and Environmental Science
- Shanghai Normal University
- Shanghai
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35
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Batista DPC, Souza RDS, Santos-Magalhães NS, de Sena-Filho JG, Teodoro AV, Grillo LAM, Dornelas CB. Polymer/Layered Silicate Nanocomposite as Matrix for Bioinsecticide Formulation. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/masy.201300208] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Diogo P. C. Batista
- Curso de Farmácia (Esenfar); Universidade Federal de Alagoas (UFAL); Campus A. C. Simões Maceió, AL Brazil
| | - Rafael da S. Souza
- Curso de Farmácia (Esenfar); Universidade Federal de Alagoas (UFAL); Campus A. C. Simões Maceió, AL Brazil
| | - Nereide S. Santos-Magalhães
- Laboratório de Imunopatologia Keizo Asami (LIKA); Universidade Federal de Pernambuco (UFPE); Recife PE Brazil
| | - José G. de Sena-Filho
- Empresa Brasileira de Pesquisa Agropecuária (Embrapa Tabuleiros Costeiros); Aracaju; SE Brazil
| | - Adenir V. Teodoro
- Empresa Brasileira de Pesquisa Agropecuária (Embrapa Tabuleiros Costeiros); Aracaju; SE Brazil
| | - Luciano A. M. Grillo
- Curso de Farmácia (Esenfar); Universidade Federal de Alagoas (UFAL); Campus A. C. Simões Maceió, AL Brazil
| | - Camila B. Dornelas
- Curso de Farmácia (Esenfar); Universidade Federal de Alagoas (UFAL); Campus A. C. Simões Maceió, AL Brazil
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Characterization of Raoultella planticola Rs-2 microcapsule prepared with a blend of alginate and starch and its release behavior. Carbohydr Polym 2014; 110:259-67. [DOI: 10.1016/j.carbpol.2014.04.011] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2014] [Revised: 03/17/2014] [Accepted: 04/03/2014] [Indexed: 11/22/2022]
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37
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Abstract
AbstractPolymers have been widely used in agriculture for applications including controlled release of pesticides and other active ingredients. The ability to predict their delivery helps avoid environmental hazards. Macromolecular matrices used as carriers in controlled release of agricultural active agents, especially pesticides, are reviewed. The review focuses on the advantages and mechanisms of controlled release. It includes biodegradable polymers in agriculture, their manufacturing methods, and their degradation mechanisms and kinetics. The article also presents a critical account of recent release studies and considers upcoming challenges.
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Shirvani M, Farajollahi E, Bakhtiari S, Ogunseitan OA. Mobility and efficacy of 2,4-D herbicide from slow-release delivery systems based on organo-zeolite and organo-bentonite complexes. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2014; 49:255-262. [PMID: 24502212 DOI: 10.1080/03601234.2014.868275] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
This research aimed to develop slow-release formulations (SRFs) of 2,4-dichlorophenoxyacetic acid (2,4-D) using zeolite and bentonite minerals modified with cetyltrimethylammonium (CTMA) surfactant. Adsorption-desorption, greenhouse bioassay and column experiments were carried out to assess the potential of the SRFs to control weeds while reducing the herbicide leaching losses to deep layers of soil. The results showed that only 6.5 mmol 2,4-D kg(-1) was retained by Na-bent, and the herbicide was not adsorbed by Na-zeol at all. The surface modification with CTMA surfactant, however, improved the 2,4-D adsorption capacity of the zeolite and bentonite up to 207.5 and 415.8 mmol kg(-1), respectively. The synthesized organo-minerals slowly released the retained 2,4-D discharging 22 to 64% of the adsorbed 2,4-D to the solution phase within 7 days. The SRFs significantly (P = 0.05) reduced the herbicide mobility within the soil columns keeping a great portion of the herbicide active ingredient in the upper 5 cm soil layer. The SRFs were significantly (P = 0.05) as effective as the free technical herbicide in weed control without harming the ryegrass as the main plant. Therefore, the synthesized SRFs could be considered as useful tools for weed control in sustainable agriculture.
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Affiliation(s)
- Mehran Shirvani
- a Department of Soil Science, College of Agriculture , Isfahan University of Technology , Isfahan , Iran
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Bakhtiary S, Shirvani M, Shariatmadari H. Adsorption-desorption behavior of 2,4-D on NCP-modified bentonite and zeolite: implications for slow-release herbicide formulations. CHEMOSPHERE 2013; 90:699-705. [PMID: 23089387 DOI: 10.1016/j.chemosphere.2012.09.052] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2012] [Revised: 08/31/2012] [Accepted: 09/11/2012] [Indexed: 06/01/2023]
Abstract
Clay minerals have obtained considerable attention for slow-release formulation of herbicides to increase weed control efficacy and reduce leaching potential and environmental pollution. This study deals with preparing, characterizing and examining the potentials of modified bentonite and zeoilite in adsorption and release of 2,4-dichlorophenoxyacetic acid (2,4-D) herbicide. 2,4-D sorption of the N-cetylpyridinium (NCP)-modified bentonites and zeolites were much higher than those of unmodified substrates. The 2,4-D adsorption capacity of the organo-minerals increased with increasing surfactant loading. Desorption isotherms of 2,4-D did not coincide their corresponding sorption isotherms showing hysteresis. The proportion of 2,4-D released from the organo-minerals after seven desorption cycles varied between 29% and 50% of the total retained herbicide. The sorbed 2,4-D on the adsorbents showed gradual release pattern with time. The release pattern of 2,4-D from NCP-modified bentonite and zeolite, make these synthetic organo-minerals suitable candidate for slow release formulation of 2,4-D.
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Affiliation(s)
- Somayeh Bakhtiary
- Department of Soil Science, College of Agriculture, Isfahan University of Technology, Isfahan, Iran
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Chevillard A, Angellier-Coussy H, Guillard V, Gontard N, Gastaldi E. Investigating the biodegradation pattern of an ecofriendly pesticide delivery system based on wheat gluten and organically modified montmorillonites. Polym Degrad Stab 2012. [DOI: 10.1016/j.polymdegradstab.2012.02.017] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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41
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Abd El-Mohdy HL. Controlled release of testosterone propionate based on poly N-vinyl pyrrolidone/2-acrylamido-2-methyl-1-propanesulfonic acid hydrogels prepared by ionizing radiation. JOURNAL OF POLYMER RESEARCH 2012. [DOI: 10.1007/s10965-012-9931-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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42
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Chevillard A, Angellier-Coussy H, Guillard V, Gontard N, Gastaldi E. Controlling pesticide release via structuring agropolymer and nanoclays based materials. JOURNAL OF HAZARDOUS MATERIALS 2012; 205-206:32-9. [PMID: 22230752 DOI: 10.1016/j.jhazmat.2011.11.093] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2011] [Revised: 11/24/2011] [Accepted: 11/27/2011] [Indexed: 05/25/2023]
Abstract
The potential use of nanoclays for modulating transfer properties of active agents in bio-sourced polymers was explored. For this purpose, new pesticide formulations were designed by combining wheat gluten, ethofumesate (model pesticide) and three montmorillonites (MMT) using a bi-vis extrusion process. Controlled release properties, evaluated through release experiments in water, were discussed in relation to the material formulations and their resulting structure. Partition coefficients were calculated from experimental data and diffusivity values were identified with a Fick's second law mechanistic model. The effect of temperature on release pattern was also evaluated and the activation energy of diffusion was determined. Ethofumesate release was slowed down for all wheat gluten based-formulations as compared to the commercial product. This slow release effect was increased in the presence of hydrophobic MMTs, due to a higher affinity for ethofumesate than for wheat gluten. Contrarily, hydrophilic MMT, displaying a greater affinity for wheat gluten than for ethofumesate seemed ineffective to slow down its release despite the tortuous pathway achieved through a well-exfoliated structure. To conclude, the release mechanisms would be rather governed by pesticide/MMT interactions than MMT/polymer matrix in the case of a hydrophobic pesticide such as ethofumesate and a hydrophilic matrix such as wheat gluten.
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Affiliation(s)
- Anne Chevillard
- UMR IATE, Université Montpellier II, CC023, pl. E Bataillon, 34095 Montpellier Cedex, France.
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Encapsulation of R. planticola Rs-2 from alginate-starch-bentonite and its controlled release and swelling behavior under simulated soil conditions. ACTA ACUST UNITED AC 2012; 39:317-27. [DOI: 10.1007/s10295-011-1028-2] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2011] [Accepted: 08/09/2011] [Indexed: 10/17/2022]
Abstract
Abstract
The plant growth-promoting bacteria (PGPR) Raoultella planticola Rs-2 was encapsulated with the various blends of alginate, starch, and bentonite for development of controlled-release formulations. The stability and release characteristics of these different capsule formulations were evaluated. The entrapment efficiency of Rs-2 in the beads (capsules) was more than 99%. The diameter of dry beads ranged from 0.98 to 1.41 mm. The bacteria release efficiency, swelling ratio, and biodegradability of the different bead formulations were enhanced by increasing the starch or alginate contents, but were impeded by higher bentonite content. The release kinetics of viable cells from capsules and the swelling ratio of capsules were studied in simulated soil media of varying temperature, moisture, pH, and salt content. The release of loaded Rs-2 cells and swelling of capsules are greatly affected by moisture, temperature, pH and salt content of the release medium. The release of viable Rs-2 cells from capsules was positively associated with the swelling properties of the capsules. The release of Rs-2 cells occurred through a Case II diffusion mechanism. In summary, this work indicates that alginate-starch-bentonite blends are a viable option for the development of efficient controlled-release formulations of Rs-2 biofertilizer, and which could have a promising application in natural field conditions.
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