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Liu B, Zhu Y, Yang C, Ma L, Zhang F, Hao M, Wang Z, Bai L, An J, Xiao D. Study on the Preparation and Properties of Thermally Conductive Semi-Aromatic Heat-Resistant PA5T-CO-10T/ Hexagonal Boron Nitride Composites. Polymers (Basel) 2025; 17:1031. [PMID: 40284296 PMCID: PMC12030728 DOI: 10.3390/polym17081031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2025] [Revised: 03/28/2025] [Accepted: 04/07/2025] [Indexed: 04/29/2025] Open
Abstract
In this paper, we report a novel thermally conductive semi-aromatic heat-resistant PA5T-CO-10T/hexagonal boron nitride (PA5T-CO-10T/BN) composite, based on as-synthesized PA5T-CO-10T, which is a copolymer of poly (pentamethylene terephthalamide) (PA5T) and poly (decamethylene terephthalamide) (PA10T). We confirmed the structure of PA5T-CO-10T through a nuclear magnetic resonance carbon spectrometer (13C-NMR). The differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) results indicate that PA5T-CO-10T demonstrates a processing window (greater than 90 °C) which is suitable for melt processing and injection molding. Moreover, the PA5T-CO-10T composites with different BN contents were tested by scanning electron microscopy (SEM), a thermal conductivity meter, a rotational rheometer and X-ray diffraction (XRD). The results indicate that as the content of h-BN increases, the thermal conductivity of the PA5T-CO-10T/BN composites is significantly enhanced. When the mass of h-BN reaches 30 wt%, the thermal conductivity of the composite material is 2.5 times that of the original matrix resin. Simultaneously, there is a notable upward trend observed in the storage modulus, loss modulus, complex viscosity and orientation degree of h-BN. This is attributed to the high thermal conductivity and the high orientation degree of h-BN, which ensure the continuous enhancement of the material's thermal conductivity. Additionally, the introduction of h-BN enhances the degree of connection between the material's molecular chains. PA5T-CO-10T/BN possesses excellent heat resistance and thermal conductivity, presenting significant application prospects in the fields of electronics, electrical appliances and automobiles.
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Affiliation(s)
- Bingxiao Liu
- Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan 030008, China; (Y.Z.); (L.M.); (M.H.); (L.B.); (J.A.); (D.X.)
- Shanxi Center of Technology Innovation for Polyamide Materials, Taiyuan 030000, China;
| | - Yunzhen Zhu
- Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan 030008, China; (Y.Z.); (L.M.); (M.H.); (L.B.); (J.A.); (D.X.)
| | - Chen Yang
- Shanxi Center of Technology Innovation for Polyamide Materials, Taiyuan 030000, China;
- Research and Development Center, Cathay Biotech Inc., Shanghai 201114, China
| | - Liqun Ma
- Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan 030008, China; (Y.Z.); (L.M.); (M.H.); (L.B.); (J.A.); (D.X.)
| | - Fuchun Zhang
- Shanxi Center of Technology Innovation for Polyamide Materials, Taiyuan 030000, China;
- Research and Development Center, Cathay Biotech Inc., Shanghai 201114, China
| | - Mingzheng Hao
- Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan 030008, China; (Y.Z.); (L.M.); (M.H.); (L.B.); (J.A.); (D.X.)
| | - Zhongqiang Wang
- Technology Center, Guangdong Sinoplast Advanced Material Co., Ltd., Dongguan 523879, China;
| | - Lizhen Bai
- Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan 030008, China; (Y.Z.); (L.M.); (M.H.); (L.B.); (J.A.); (D.X.)
| | - Jiale An
- Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan 030008, China; (Y.Z.); (L.M.); (M.H.); (L.B.); (J.A.); (D.X.)
| | - Dongqi Xiao
- Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan 030008, China; (Y.Z.); (L.M.); (M.H.); (L.B.); (J.A.); (D.X.)
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Aboud O, Liu Y, Dahabiyeh L, Abuaisheh A, Li F, Aboubechara JP, Riess J, Bloch O, Hodeify R, Tagkopoulos I, Fiehn O. Profile Characterization of Biogenic Amines in Glioblastoma Patients Undergoing Standard-of-Care Treatment. Biomedicines 2023; 11:2261. [PMID: 37626757 PMCID: PMC10452138 DOI: 10.3390/biomedicines11082261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 07/29/2023] [Accepted: 08/07/2023] [Indexed: 08/27/2023] Open
Abstract
INTRODUCTION Biogenic amines play important roles throughout cellular metabolism. This study explores a role of biogenic amines in glioblastoma pathogenesis. Here, we characterize the plasma levels of biogenic amines in glioblastoma patients undergoing standard-of-care treatment. METHODS We examined 138 plasma samples from 36 patients with isocitrate dehydrogenase (IDH) wild-type glioblastoma at multiple stages of treatment. Untargeted gas chromatography-time of flight mass spectrometry (GC-TOF MS) was used to measure metabolite levels. Machine learning approaches were then used to develop a predictive tool based on these datasets. RESULTS Surgery was associated with increased levels of 12 metabolites and decreased levels of 11 metabolites. Chemoradiation was associated with increased levels of three metabolites and decreased levels of three other metabolites. Ensemble learning models, specifically random forest (RF) and AdaBoost (AB), accurately classified treatment phases with high accuracy (RF: 0.81 ± 0.04, AB: 0.78 ± 0.05). The metabolites sorbitol and N-methylisoleucine were identified as important predictive features and confirmed via SHAP. CONCLUSION To our knowledge, this is the first study to describe plasma biogenic amine signatures throughout the treatment of patients with glioblastoma. A larger study is needed to confirm these results with hopes of developing a diagnostic algorithm.
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Affiliation(s)
- Orwa Aboud
- Department of Neurology, University of California, Davis, Sacramento, CA 95817, USA
- Department of Neurological Surgery, University of California, Davis, Sacramento, CA 95817, USA
- Comprehensive Cancer Center, University of California Davis, Sacramento, CA 95817, USA
| | - Yin Liu
- Department of Neurology, University of California, Davis, Sacramento, CA 95817, USA
- Department of Neurological Surgery, University of California, Davis, Sacramento, CA 95817, USA
- Department of Ophthalmology, University of California, Davis, Sacramento, CA 95817, USA
| | - Lina Dahabiyeh
- West Coast Metabolomics Center, University of California Davis, Davis, CA 95616, USA
- Department of Pharmaceutical Sciences, School of Pharmacy, The University of Jordan, Amman 11942, Jordan
| | - Ahmad Abuaisheh
- School of Medicine, Al Balqa Applied University, Al-Salt 19117, Jordan
| | - Fangzhou Li
- Department of Computer Science, University of California, Davis, Sacramento, CA 95616, USA
- Genome Center, University of California, Davis, Sacramento, CA 95616, USA
- USDA/NSF AI Institute for Next Generation Food Systems (AIFS), Davis, CA 95616, USA
| | | | - Jonathan Riess
- Comprehensive Cancer Center, University of California Davis, Sacramento, CA 95817, USA
- Department of Internal Medicine, Division of Hematology and Oncology, University of California, Davis, Sacramento, CA 95817, USA
| | - Orin Bloch
- Department of Neurological Surgery, University of California, Davis, Sacramento, CA 95817, USA
| | - Rawad Hodeify
- Department of Biotechnology, School of Arts and Sciences, American University of Ras Al Khaimah, Ras Al-Khaimah 10021, United Arab Emirates
| | - Ilias Tagkopoulos
- Department of Computer Science, University of California, Davis, Sacramento, CA 95616, USA
- Genome Center, University of California, Davis, Sacramento, CA 95616, USA
- USDA/NSF AI Institute for Next Generation Food Systems (AIFS), Davis, CA 95616, USA
| | - Oliver Fiehn
- West Coast Metabolomics Center, University of California Davis, Davis, CA 95616, USA
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Liu B, Li KN, Luo SW, Huang JZ, Pang H, Gong LZ. Chiral gold complex-catalyzed hetero-Diels-Alder reaction of diazenes: highly enantioselective and general for dienes. J Am Chem Soc 2013; 135:3323-6. [PMID: 23421493 DOI: 10.1021/ja3110472] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A chiral gold(I) complex-catalyzed highly regio- and enantioselective azo hetero-Diels-Alder reaction has been developed. The chiral gold(I) complex acting as a Lewis acid exhibits high efficiency in the activation of urea-based diazene dienophiles. Moreover, this chiral gold catalyst also rendered a cascade intramolecular enyne cycloisomerization/asymmetric azo-HDA reaction.
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Affiliation(s)
- Bin Liu
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
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Abstract
Hexamethylendiamine (HMDA; CAS No. 124-09-4; 6055-52-3 for the dihydrochloride salt) is moderately toxic following acute doses/exposures with oral lethal doses in rats ranging from 750 to 1500 mg/kg. HMDA is extremely irritating to the skin and eyes and is not a sensitizer in guinea pigs. Repeated exposure inhalation studies have defined the upper respiratory tract to be the first target of HMDA. The irritation seen is proportional to the exposure concentration. Systemic damage is limited. Genetic testing is not extensive, but there is no indication of activity. HMDA is neither a developmental nor a reproductive toxin, but in one developmental study, the fetal No-observed-adverse-effect-level (NOAEL) was lower than that of the maternal animal. No carcinogenicity studies have been conducted. Documented human experience is limited, but indications of HMDA's irritative properties are found in the literature. HMDA does not persist or bioaccumulate in the environment. The chemical is not particularly toxic to fish and aquatic invertebrates but is quite toxic to algae. HMDA is rapidly absorbed and metabolized by the rat with little tissue storage.
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