Jiulong Wang¹, Yanqing Gao², Xiaoping Rao³, Zongde Wang¹, Shibin Shang⁴, Zhanqian Song⁴, Hongyan Si^1,*, Shengliang Liao^1,*

Journal of Renewable Materials, Vol.11, No.5, pp. 2367-2379, 2023, DOI:10.32604/jrm.2023.026333

Abstract The preparation of bioactive derivatives from the renewable natural product pinene is a hot research topic in the deep processing and utilization of pinene. In this study, β-pinene was used to develop novel molecules as a promising new precursor of insecticide. A series of amide-containing derivatives of β-pinene were synthesized and characterized. The insecticidal activities of these derivatives against Mythimna separate and Semiaphis heraclei were tested. The structure characterization results showed that the characterization data of amide-containing derivatives were in full agreement with their proposed structures. The insecticidal activities evaluation results indicated that amide-containing derivatives exhibited weak insecticidal activity against… More >

Shuangsheng Zhang, Bin Sun, Siyu Li, Xiangyu Lin, Muhua Chen^*, Xu Xu^*

Journal of Renewable Materials, Vol.11, No.2, pp. 853-865, 2023, DOI:10.32604/jrm.2022.022901

Abstract Hydrogels have been widely applied in agricultural drought-resistance, pollution regulation, drug delivery and so on. Acrylamide (AM) is usually used as raw material to synthesize acrylamide hydrogels. However, inherently low mechanical strength greatly limits their applications in some special areas. Therefore, it is necessary to choose suitable functional monomers to optimize acrylamide hydrogels and improve their mechanical performances. In this paper, a novel acrylamide monomer modified by rosin was synthesized, and then polyacrylamide/rosin-based acrylamide (RAM) composite hydrogels were prepared via free radical polymerization using potassium persulfate as initiator, N, N′-methylene-bisacrylamide (MBA) as a crosslinker. The influence of RAM monomer was… More > Graphic Abstract

Leendert W. Schwab, Wouter M. J. Kloosterman, Jakob Konieczny, Katja Loos^*

Journal of Renewable Materials, Vol.1, No.1, pp. 73-78, 2013, DOI:10.7569/JRM.2012.634102

Abstract The papain catalyzed enzymatic synthesis of amido amines catalyzed from aromatic diamines and N-carbobenzyloxy (Z) protected amino acids (Gly, L-Leu, L-Phe) is described. The amides precipitate (yield 19–47 % depending on the amino acid used) from the reaction mixture after one amide bond is formed thus preventing the formation of diamides in all cases. Papain retains its activity in buffers with a higher pH (9 and 12) observable by the amide bond formation between 1,3-phenylene diamine and Z-L-Gly and Z-L-Phe. Aliphatic diamines (1,4-butanediamine and 1,6-hexanediamine) were used as well but amide formation could not be observed in buffers of pH… More >

Erythrina Stavila, Katja Loos^*

Journal of Renewable Materials, Vol.3, No.4, pp. 268-280, 2015, DOI:10.7569/JRM.2015.634102

Abstract The selective and specific features of enzymes have drawn an enormous amount of attention for use as in-vitro catalysts in polymerization reactions. Various studies on the enzymatic synthesis of polyesters, polycarbonates, polysaccharides, polypeptides, and polyamides have been performed and some have been implemented on an industrial scale. Particularly in the synthesis of polyester and polyamides, lipases are the most used enzymes as catalysts for their polymerization. Polyamides are considered to be one of the largest engineering polymer families used in the automotive, electrical and electronics, and consumer goods industries; thus the enzymatic synthesis of polyamides will have a tremendous impact… More >

Yiming Zhao^1,2, Hongsheng Zhao³, Zhili Wei⁴, Jie Yuan¹, Jie Jian¹, Fankai Kong¹, Haojiang Xie¹, Xingliang Xiong^1,2,*

Journal of Renewable Materials, Vol.10, No.11, pp. 2729-2746, 2022, DOI:10.32604/jrm.2022.019721

Abstract The flexible wearable sensors with excellent stretchability, high sensitivity and good biocompatibility are signifi- cantly required for continuously physical condition tracking in health management and rehabilitation monitoring. Herein, we present a high-performance wearable sensor. The sensor is prepared with nanocomposite hydrogel by using silk fibroin (SF), polyacrylamide (PAM), polydopamine (PDA) and graphene oxide (GO). It can be used to monitor body motions (including large-scale and small-scale motions) as well as human electrophysiological (ECG) signals with high sensitivity, wide sensing range, and fast response time. Therefore, the proposed sensor is promising in the fields of rehabilitation, motion monitoring and disease diagnosis. More >

Jia Liu^*, Ying Zhang^†, Shulan Sun^‡, Guirong Zhang^‡, Ke Jiang,§ Peixin Sun^*, Ye Zhang^*, Bing Yao^*, Rui Sui^*, Yi Chen^*, Xu Guo^*, Tao Tang^*, Ji Shi^*, Haiyang Liang^*, Haozhe Piao^*

Oncology Research, Vol.27, No.4, pp. 475-486, 2019, DOI:10.3727/096504018X15270916676926

Abstract Glioma is the most common malignant tumor of the central nervous system, and it is characterized by high relapse and fatality rates and poor prognosis. Bufalin is one of the main ingredients of Chan-su, a traditional Chinese medicine (TCM) extracted from toad venom. Previous studies revealed that bufalin exerted inhibitory effects on a variety of tumor cells. To demonstrate the inhibitory effect of bufalin on glioma cells and glioma stem-like cells (GSCs) and discuss the underlying mechanism, the proliferation of glioma cells was detected by MTT and colony formation assays following treatment with bufalin. In addition, we investigated whether bufalin… More >

Takashi Saito^*†, Atsuo Okamura^‡, Junichiro Inoue^†, Daisuke Makiura^†, Hisayo Doi^§, Kimikazu Yakushijin^¶, Hiroshi Matsuoka^¶, Yoshitada Sakai^†#, Rei Ono^*

Oncology Research, Vol.27, No.4, pp. 469-474, 2019, DOI:10.3727/096504018X15267574931782

Abstract Chemotherapy-induced peripheral neuropathy (CIPN) frequently occurs in lymphoma patients receiving R-CHOP, a drug combination therapy. Although severe CIPN may lead to reduction and/or discontinuation of the medication, predictive factors of CIPN have not been investigated sufficiently to date. We performed a retrospective exploratory research to determine associations between prevalence of severe CIPN and sociodemographic data, health characteristics, and medical conditions such as anemia at initial diagnosis. Forty patients (indolent lymphoma, n=9; diffuse large B-cell lymphoma; n=31) received R-CHOP therapy from September 2009 to July 2014. The median age of patients was 58 years (range=27–76 years). Statistical analyses were applied to… More >

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

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 characteristics of the material, increasing… More >

Lingqin Zhang, Qifeng Jiang, Yiming Zhao, Jie Yuan, Xiaoying Zha, Haojiang Xie, Fankai Kong, Xingliang Xiong^*

Journal of Renewable Materials, Vol.10, No.2, pp. 415-430, 2022, DOI:10.32604/jrm.2022.016650

Abstract The hydrogel is a preferred material for flexible wearable sensors. In practical application, it should have high-efficiency mechanical toughness and self-healing performance. Besides, hydrogel requires good affinity and adhesion because of its contact with the skin. In this experiment, we made an ultra-tough hydrogel with excellent cell affinity and adhesion. We used sodium alginate (SA) and polyacrylamide (PAm) mixture as a flexible base fluid. Polydopamine reduce graphene oxide (prGO) was used as conductive nanofiller, and then PAm-prGO-SA semi-interpenetrating network hydrogel was formed through Am radical polymerization. The presence of prGO endows the hydrogels with excellent electrical conductivity. Simultaneously, some non-reduced… More >

Shengquan Zhou¹, Minjie Shi^1,*, Wei Chen¹, Yongfei Zhang¹, Weijian Wang¹, Haojin Zhang¹, Dongwei Li²

Journal of Renewable Materials, Vol.9, No.11, pp. 1941-1957, 2021, DOI:10.32604/jrm.2021.015693

Abstract The characteristics of soil treated with cationic polyacrylamide (CPAM) mass content of 0%, 0.2%, 0.4%, 0.6%, 0.8%, and 1% were investigated through a series of laboratory tests to explore the practical engineering effect of an expansive soil amended with environmental protection material CPAM. The results indicate that with the increasing CPAM content, the liquid limit and plasticity index of soil decrease, the plastic limit increases, and the free swelling ratio and loaded swelling ratio decrease. Besides, the improved soil has less disintegrating property and better water stability. The shear strength increases as the content increases, and the optimal content is… More > Graphic Abstract