MARIA JENITA, LALITHAPRIYA U, SUKUMAR M^*

Journal of Polymer Materials, Vol.39, No.1-2, pp. 71-87, 2022, DOI:10.32381/JPM.2022.39.1-2.5

Abstract In this study, a multi-layered green polymer-based packaging composite assembled by active flavonoid Kaempferol grafted with starch-chitosan was prepared, and its characteristics and effect on meat storage, including physicochemical characteristics and antioxidant capacity, were analysed and evaluated at refrigeration conditions given four treatments: CON (control— without coating), SEC (with starch+chitin), P01 (with starch+chitin + 1% of Kaempferol) and P02 (with starch+chitin + 2% of Kaempferol). The addition of Kaempferol increased the antioxidant activity of meat and inhibited the lipid oxidation until day 24 upon migration effect; also improving meat acceptability. The Rancimat induction time confirmed More >

Weixing Zhang, Chunxia He^*

Journal of Renewable Materials, Vol.10, No.12, pp. 3263-3283, 2022, DOI:10.32604/jrm.2022.020516 - 14 July 2022

Abstract With the exponential growth of the computing power, machine learning techniques have been successfully used in various applications. This paper intended to predict and optimize the shear strength of single lap cassava starchbased adhesive joints for comparison with the application of artificial intelligence (AI) methods. The shear strength was firstly determined by the experiment with three independent experimental variables (starch content, NaOH concentration and reaction temperature). The analysis of range (ANORA) and analysis of variance (ANOVA) were applied to investigate the optimal combination and the significance of each factor for the shear strength based on… More >

Yongjie Zheng^1,2,3,*, Mingjian Xu¹, Jingzhi Tian¹, Meihong Yu¹, Bin Tan⁴, Hong Zhao^2,3,*, Yin Tang^2,3

Journal of Renewable Materials, Vol.10, No.11, pp. 2949-2959, 2022, DOI:10.32604/jrm.2022.019702 - 29 June 2022

Abstract Fully bio-based and biodegradable starch/polylactic acid blends have received increasing attentions for their biodegradability and potential to offset the use of unsustainable fossil resources, specifically, their application in packaging. Herein, corn starch was first esterified with maleic anhydride and then compounded with polylactide (PLA) to prepare esterified corn starch/polylactic acid blends with starch content up to 35 wt%. The structures, morphologies, thermal and mechanical properties of starch or blends were investigated. The results showed that corn starch was successfully grafted with maleic anhydride, which showed increased crystallinity and particle size than native starch. Esterified corn More >

Yatim Lailun Ni’mah^*, Suprapto Suprapto, Harmami, Ita Ulfin, Puput Asmaul Fauziyah

Journal of Renewable Materials, Vol.10, No.9, pp. 2365-2376, 2022, DOI:10.32604/jrm.2022.020001 - 30 May 2022

Abstract Capsule shells have been successfully fabricated from water-soluble chitosan (WSC) with the addition of alginate and Gembili starch. WSC was synthesized from crab shell chitosan by depolymerization reaction. The capsule shells were made with the composition of WSC: Alginate, 2:1, 3:1 and 4:1 (w/w) with and without the addition of Gembili starch. Gembili starch was added with a ratio of Alginate: Starch, 1:1 (w/w). The capsule shell properties were evaluated according to Indonesian Pharmacopoeia standard. The solubility test showed that the capsule shells were comply with the standard. The highest degrees of swelling in water More > Graphic Abstract

Diego David Pinzón-Moreno^*, Eder Clidio Vicuña-Galindo, José Vulfrano González-Fernández, José Luis Soto-Gonzales, María Verónica Carranza-Oropeza^*

Journal of Renewable Materials, Vol.10, No.8, pp. 2179-2201, 2022, DOI:10.32604/jrm.2022.019793 - 25 April 2022

Abstract Several hydrogels were synthesized by free-radical polymerization in an aqueous medium based on potato starch (PS), poly(vinyl alcohol) (PVA), and N,N′-Methylenebisacrylamide (MBAm), being possible to study these hydrogels as a function of the proportion of components incorporated. In this way, the products generated from the synthesis were characterized by swelling and deswelling kinetics, the first swelling being verified with Schott and statistical models, allowing to contrast the proximity between the experimental and theoretical behavior. Additionally, water retention in soil (R%), spectroscopy (FTIR), morphological (SEM), and thermal (TGA and DSC) analysis allowing to know the intrinsic More >

Xiwen Shao¹, Dongsheng Gai¹, Dapeng Gao¹, Yanqiu Geng^1,*, Liying Guo^1,2,*

Phyton-International Journal of Experimental Botany, Vol.91, No.4, pp. 745-759, 2022, DOI:10.32604/phyton.2022.018933 - 09 December 2021

Abstract The aim of this study was to investigate carbohydrate metabolism in rice seedlings subjected to salt-alkaline stress. Two relatively salt-alkaline tolerant (Changbai 9) and sensitive (Jinongda 138) rice cultivars, grown hydroponically, were subjected to salt-alkaline stress via 50 mM of salt-alkaline solution. The carbohydrate content and the activities of metabolism-related enzymes in the leaves and roots were investigated. The results showed that the contents of sucrose, fructose, and glucose in the leaves and roots increased under salt-alkaline stress. Starch content increased in the leaves but decreased in the roots under salt-alkaline stress. The activities of More >

YASSER S. MOSTAFA^1,*, SAAD A. ALAMRI^1,2, SULIMAN A. ALRUMMAN¹, TAREK H. TAHA³, MOHAMED HASHEM^1,4, MAHMOUD MOUSTAFA^1,5, LAMIAA I. FAHMY⁶

BIOCELL, Vol.45, No.6, pp. 1661-1672, 2021, DOI:10.32604/biocell.2021.016193 - 01 September 2021

Abstract The study was sought to enhance the synthesis of thermal stable β-cyclodextrin glycosyltransferase (β-CGTase) using potato wastewater as a low-cost medium and assess the degree to which it is efficient for industrial production of β-cyclodextrin (β-CD) from raw potato starch. Thermophilic bacteria producing β-CGTase was isolated from Saudi Arabia and the promising strain was identified as Bacillus licheniformis using phylogenetic analysis of the 16S rRNA gene. Alginate-encapsulated cultures exhibited twice-fold of β-CGTase production more than free cells. Scanning electron microscopy (SEM) of polymeric capsules indicated the potential for a longer shelf-life, which promotes the restoration of… More >

Na Kuang, Huabin Zheng, Qiyuan Tang^*, Yuanwei Chen, Xiaomin Wang, Youyi Luo

Phyton-International Journal of Experimental Botany, Vol.90, No.4, pp. 1119-1230, 2021, DOI:10.32604/phyton.2021.014637 - 27 April 2021

Abstract Rice ratooning, or the production of a second rice crop from stubble after the harvest of the main crop, is considered to be a green and resource-efficient rice production system. The present study was conducted to examine variance in amylose content (AC), grain morphology, crystal structure, and thermal properties of starch between main- and ratoon-season rice of seven varieties. Ratoon-season rice grains had higher ACs and significantly lower transition gelatinization temperatures (To, Tp, and Tc) than did main-season rice grains. The relative crystallinity and lamellar peak intensity of ratoon-season rice starch were 7.89% and 20.38% lower, respectively, More >

Yangling Li¹, Zhengrong Li¹, Hui Yu¹, Gang Huang¹, Xiaopeng Pei², Kun Xu^2,*, Pixin Wang², Ying Tan^3,*

Journal of Renewable Materials, Vol.9, No.8, pp. 1365-1376, 2021, DOI:10.32604/jrm.2021.014909 - 08 April 2021

Abstract In this work, the –catechol and –thiol modified starch was prepared by the esterification and amino condensation reaction, then a fully starch based hydrogel was prepared via the thiol-catechol Michael addition reaction. The starch hydrogel gained shape memory behaviors by coordinate with Fe³⁺ ions at alkaline condition. ¹ H-NMR had been used to character the structure of the starch derivatives and its character peaks. The hydrogel’s modulus had also been measured before and after coordinating with Fe³⁺ ions in linear area and the result showed that both the hydrogel’s storage modulus and loss modulus kept constant in More >

Xiaojian Chen¹, Wenrui Yao¹, Feifei Gao¹, Dingyuan Zheng¹, Qiong Wang³, Jun Cao^2,*, Haiyan Tan¹, Yanhua Zhang^1,2,*

Journal of Renewable Materials, Vol.9, No.5, pp. 979-992, 2021, DOI:10.32604/jrm.2021.014751 - 20 February 2021

Abstract The morphology and properties of corn starch and cassava starch were compared by SEM, DSC and TGA. The effects of amylose and amylopectin content on starch properties were studied by FT-IR, XRD and XPS. The plywood was pressed with the prepared adhesive and the bonding strength of the plywood was tested to analyze the difference among the adhesives from different plant sources and the difference after blending PAPI prepolymer. FT-IR results showed that the hydroxyl peak of cassava starch was stronger and wider. TGA showed that the residue of cassava starch was lower, but the More >