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Tao YH, Dai X, Moggach SA, Clode PL, Fitzgerald AJ, Hodgetts SI, Harvey AR, Wallace VP. The spectrum of Ih ice using terahertz time-domain spectroscopy. J Chem Phys 2024; 160:214503. [PMID: 38828818 DOI: 10.1063/5.0193458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Accepted: 05/06/2024] [Indexed: 06/05/2024] Open
Abstract
Here, we report the frequency-dependent spectrum of ice Ih in the range of 0.2-2 THz. We confirm the presence of a feature that blue-shifts from around 1.55-1.65 THz with a decreasing temperature from 260 to 160 K. There is also a change in the trend of the refractive index of ice corresponding to a dispersion, which is also around 1.6 THz. The features are reproduced in data acquired with three commercial terahertz time-domain spectrometers. Computer-simulated spectra assign the feature to lattice translations perpendicular to the 110 and 1̄10 planes of the ice Ih crystal. The feature's existence should be recognized in the terahertz measurements of frozen aqueous solution samples to avoid false interpretations.
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Affiliation(s)
- Yu Heng Tao
- Department of Physics, The University of Western Australia, Crawley, WA 6009, Australia
| | - Xiangyu Dai
- College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, Guangdong, China
| | - Stephen A Moggach
- School of Molecular Sciences, The University of Western Australia, Crawley, WA 6009, Australia
| | - Peta L Clode
- Centre for Microscopy, Characterisation, and Analysis, The University of Western Australia, Crawley, Western Australia, Australia
| | - Anthony J Fitzgerald
- Department of Physics, The University of Western Australia, Crawley, WA 6009, Australia
| | - Stuart I Hodgetts
- School of Human Sciences, The University of Western Australia, Crawley, WA 6009, Australia
- Perron Institute for Neurological and Translational Science, Nedlands, WA, Australia
| | - Alan R Harvey
- School of Human Sciences, The University of Western Australia, Crawley, WA 6009, Australia
- Perron Institute for Neurological and Translational Science, Nedlands, WA, Australia
| | - Vincent P Wallace
- Department of Physics, The University of Western Australia, Crawley, WA 6009, Australia
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Komandin GA, Zaytsev KI, Dolganova IN, Nozdrin VS, Chuchupal SV, Anzin VB, Spektor IE. Quantification of solid-phase chemical reactions using the temperature-dependent terahertz pulsed spectroscopy, sum rule, and Arrhenius theory: thermal decomposition of α-lactose monohydrate. OPTICS EXPRESS 2022; 30:9208-9221. [PMID: 35299355 DOI: 10.1364/oe.453528] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 02/28/2022] [Indexed: 06/14/2023]
Abstract
Transformations of the low-energy vibrational spectra are associated with structural changes in an analyte and closely related to the instability of weak chemical bounds. Terahertz (THz)/far-infrared optical spectroscopy is commonly used to probe such transformation, aimed at characterization of the underlying solid-phase chemical reactions in organic compounds. However, such studies usually provide quite qualitative information about the temperature- and time-dependent parameters of absorption peaks in dielectric spectra of an analyte. In this paper, an approach for quantitative analyses of the solid-phased chemical reactions based on the THz pulsed spectroscopy was developed. It involves studying an evolution of the sample optical properties, as a function of the analyte temperature and reaction time, and relies on the classical oscillator model, the sum rule, and the Arrhenius theory. The method allows one to determine the temperature-dependent reaction rate V1(T) and activation energy Ea. To demonstrate the practical utility of this method, it was applied to study α-lactose monohydrate during its temperature-induced molecular decomposition. Analysis of the measured THz spectra revealed the increase of the reaction rate in the range of V1 ≃ ~9 × 10-4-10-2 min-1, when the analyte temperature rises from 313 to 393 K, while the Arrhenius activation energy is Ea ≃ ~45.4 kJ/mol. Thanks to a large number of obtained physical and chemical parameters, the developed approach expands capabilities of THz spectroscopy in chemical physics, analytical chemistry, and pharmaceutical industry.
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Fang K, Shen Y, Ru Yie KH, Zhou Z, Cai L, Wu S, Al-Bishari AM, Al-Baadani MA, Shen X, Ma P, Liu J. Preparation of Zirconium Hydrogen Phosphate Coatings on Sandblasted/Acid-Etched Titanium for Enhancing Its Osteoinductivity and Friction/Corrosion Resistance. Int J Nanomedicine 2022; 16:8265-8277. [PMID: 35002230 PMCID: PMC8729793 DOI: 10.2147/ijn.s337028] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 12/14/2021] [Indexed: 01/01/2023] Open
Abstract
Background Sandblasted/acid-etched titanium (SLA-Ti) implants are widely used for dental implant restoration in edentulous patients. However, the poor osteoinductivity and the large amount of Ti particles/ions released due to friction or corrosion will affect its long-term success rate. Purpose Various zirconium hydrogen phosphate (ZrP) coatings were prepared on SLA-Ti surface to enhance its friction/corrosion resistance and osteoinduction. Methods The mixture of ZrCl4 and H3PO4 was first coated on SLA-Ti and then calcined at 450°C for 5 min to form ZrP coatings. In addition to a series of physiochemical characterization such as morphology, roughness, wettability, and chemical composition, their capability of anti-friction and anti-corrosion were further evaluated by friction-wear test and by potential scanning. The viability and osteogenic differentiation of MC3T3-E1 cells on different substrates were investigated via MTT, mineralization and PCR assays. Results The characterization results showed that there were no significant changes in the morphology, roughness and wettability of ZrP-modified samples (SLA-ZrP0.5 and SLA-ZrP0.7) compared with SLA group. The results of electrochemical corrosion displayed that both SLA-ZrP0.5 and SLA-ZrP0.7 (especially the latter) had better corrosion resistance than SLA in normal saline and serum-containing medium. SLA-ZrP0.7 also exhibited the best friction resistance and great potential to enhance the spreading, proliferation and osteogenic differentiation of MC3T3-E1 cells. Conclusion We determined that SLA-ZrP0.7 had excellent comprehensive properties including anti-corrosion, anti-friction and osteoinduction, which made it have a promising clinical application in dental implant restoration.
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Affiliation(s)
- Kai Fang
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, 325000, People's Republic of China
| | - Yiding Shen
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, 325000, People's Republic of China
| | - Kendrick Hii Ru Yie
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, 325000, People's Republic of China
| | - Zixin Zhou
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, 325000, People's Republic of China
| | - Lei Cai
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, 325000, People's Republic of China
| | - Shuyi Wu
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, 325000, People's Republic of China
| | - Abdullrahman M Al-Bishari
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, 325000, People's Republic of China
| | - Mohammed A Al-Baadani
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, 325000, People's Republic of China
| | - Xinkun Shen
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, 325000, People's Republic of China
| | - Pingping Ma
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, 325000, People's Republic of China
| | - Jinsong Liu
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, 325000, People's Republic of China
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Formulating a heat- and shear-labile drug in an amorphous solid dispersion: Balancing drug degradation and crystallinity. Int J Pharm X 2021; 3:100092. [PMID: 34977559 PMCID: PMC8683684 DOI: 10.1016/j.ijpx.2021.100092] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Accepted: 07/12/2021] [Indexed: 12/02/2022] Open
Abstract
We seek to further addresss the questions posed by Moseson et al. regarding whether any residual crystal level, size, or characteristic is acceptable in an amorphous solid dispersion (ASD) such that its stability, enhanced dissolution, and increased bioavailability are not compromised. To address this highly relevant question, we study an interesting heat- and shear-labile drug in development, LY3009120. To study the effects of residual crystallinity and degradation in ASDs, we prepared three compositionally identical formulations (57–1, 59–4, and 59–5) using the KinetiSol process under various processing conditions to obtain samples with various levels of crystallinity (2.3%, 0.9%, and 0.1%, respectively) and degradation products (0.74%, 1.97%, and 3.12%, respectively). Samples with less than 1% crystallinity were placed on stability, and we observed no measurable change in the drug's crystallinity, dissolution profile or purity in the 59–4 and 59–5 formulations over four months of storage under closed conditions at 25 °C and 60% humidity. For formulations 57–1, 59–4, and 59–5, bioavailability studies in rats reveal a 44-fold, 55-fold, and 62-fold increase in mean AUC, respectively, compared to the physical mixture. This suggests that the presence of some residual crystals after processing can be acceptable and will not change the properties of the ASD over time.
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Yan H, Fan W, Chen X, Liu L, Wang H, Jiang X. Terahertz signatures and quantitative analysis of glucose anhydrate and monohydrate mixture. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 258:119825. [PMID: 33901947 DOI: 10.1016/j.saa.2021.119825] [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: 02/17/2021] [Revised: 04/09/2021] [Accepted: 04/09/2021] [Indexed: 06/12/2023]
Abstract
Glucose, as the main energy carrier and significant source of nutrition, generally comes in two available forms of anhydrate and monohydrate in commercial production. Considering their respective application occasions, proper identification of glucose in single composition or binary-mixture and quantification of the mixture are crucial in industry monitoring to guarantee merchandise quality. Simultaneously, public confusions of glucose are rather ubiquitous partly due to anhydrate and monohydrate with identical white crystalline appearance. In this paper, utilizing the molecular fingerprints of terahertz (THz) technology that are corresponding to structural characteristics of anhydrous and hydrated form, THz signatures of glucose anhydrate, monohydrate and their mixture, as well as THz spectral transformation from monohydrate to anhydrate with the dehydrating process are systematically studied. Some visible peaks of monohydrate were noted at 1.82 and 1.99 THz signifying the presence of hydrated structure. However, with the dehydrating process, the peaks related to the hydrated structure are not very apparent when the peaks at 1.44 and 2.08 THz appear due to changes in the molecular structure of anhydrate, which provide clear indication for hydrogen-bond network reconstruction at the micro level. Furthermore, characteristic peaks at 1.44 and 1.82 THz can be specified as the main quantitative indicators for quantitative detection. The linear relationships between the amplitudes of characteristic peaks and the percentage compositions of anhydrate and monohydrate are revealed. Three commercially available brands of edible glucose powder A, B, C were effectively identified by THz signatures. While powder C was recognized as binary-mixture and the proportion of anhydrate and monohydrate was further quantified. THz spectroscopy technology has advantages of direct recognition, simple quantitative model based on THz absorption peaks, and no need for complicated chemical treatment. It may be potentially shed light on industrial monitoring of glucose production and other related mixture in the future.
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Affiliation(s)
- Hui Yan
- State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; College of Science, Zhongyuan University of Technology, Zhengzhou 450007, China; Zhengzhou Key Laboratory of Low-dimensional Quantum Materials and Devices; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wenhui Fan
- State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; University of Chinese Academy of Sciences, Beijing 100049, China; Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China.
| | - Xu Chen
- State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China
| | - Lutao Liu
- State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hanqi Wang
- State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaoqiang Jiang
- State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; University of Chinese Academy of Sciences, Beijing 100049, China
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Abstract
Co-amorphous (CAM) systems are promising drug-delivery systems in the arena of therapeutic drug delivery, addressing the poor aqueous solubility of drugs by enhancing solubility and thereby improving the oral bioavailability and therapeutic effect of the drug. A CAM system is a single-phase homogeneous blend of two or more low molecular weight molecules that can be drug–drug or drug–co-former, stabilized via intermolecular interactions, adding the benefit of thermodynamic stability. This review covers the fundamentals of CAM systems and recent advances in formulation development. In particular, we strive to address the theoretical, molecular, technical and biopharmaceutical aspects, advantages over polymeric amorphous solid dispersions, mechanisms of stabilization of amorphous forms, insights into unexplored in silico tools in excipient selection and regulatory viewpoints.
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Han J, Wei Y, Lu Y, Wang R, Zhang J, Gao Y, Qian S. Co-amorphous systems for the delivery of poorly water-soluble drugs: recent advances and an update. Expert Opin Drug Deliv 2020; 17:1411-1435. [DOI: 10.1080/17425247.2020.1796631] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Jiawei Han
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, P.R. China
| | - Yuanfeng Wei
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, P.R. China
| | - Yan Lu
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, P.R. China
| | - Runze Wang
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, P.R. China
| | - Jianjun Zhang
- School of Pharmacy, China Pharmaceutical University, Nanjing, P.R. China
| | - Yuan Gao
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, P.R. China
| | - Shuai Qian
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, P.R. China
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