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Li S, Li Z, Zhang M, Wu Z, Kong D, Qian H, Su B. Etching process enhanced H 2O 2 sensing performance of SnO 2/Zn 2SnO 4 with reliable anti-humidity ability. Anal Methods 2022; 14:3335-3344. [PMID: 35972397 DOI: 10.1039/d2ay00573e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In this work, sol-gel and chemical etching methods are adopted to synthesize zinc hydroxystannate materials. Cubic tin dioxide and zinc stannate composite materials with a definite structure are successfully prepared at varied annealing temperatures and times by using the synthesized zinc hydroxystannate as a sacrificial template. After a gas sensing test, tin dioxide and zinc stannate composite samples etched at 650 °C and annealed for 4 h exhibit a strong response and outstanding selectivity to hydrogen peroxide. Furthermore, the samples prepared under such conditions demonstrate long-term stability, and also a specified level of tolerance after the humidity stability test. Moreover, because of the simple preparation method and rapid detection of hydrogen peroxide, it is worth noting that samples prepared following the etching process at the 650 °C annealing temperature for 4 h exhibit the significant benefits of tin dioxide and zinc stannate composites. In this modern era, this research emphasizes the sample's potential for the rapid identification and detection of hydrogen peroxide.
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Affiliation(s)
- Shiqing Li
- School of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang 830046, China.
| | - ZhenJiang Li
- School of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang 830046, China.
| | - Min Zhang
- Key Laboratory of Energy Materials Chemistry, Ministry of Education, Key Laboratory of Advanced Functional Materials, Xinjiang University, Urumqi, Xinjiang 830046, China
- School of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang 830046, China.
| | - Zhaofeng Wu
- Key Laboratory of Energy Materials Chemistry, Ministry of Education, Key Laboratory of Advanced Functional Materials, Xinjiang University, Urumqi, Xinjiang 830046, China
- School of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang 830046, China.
| | - DeZheng Kong
- School of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang 830046, China.
| | - HongJun Qian
- School of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang 830046, China.
| | - BaoXue Su
- School of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang 830046, China.
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Meng YY, Dou L, Wang CM, Kong DZ, Wei Y, Wu LS, Yang Y, Zhou HW. Spinal cord infarction presenting as Brown-Séquard syndrome from spontaneous vertebral artery dissection: a case report and literature review. BMC Neurol 2019; 19:321. [PMID: 31830940 PMCID: PMC6907223 DOI: 10.1186/s12883-019-1559-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 12/05/2019] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND Spinal cord infarction (SCI) is rarely caused by vertebral artery dissection (VAD), which is an important cause of posterior circulation stroke in young and middle-aged patients. We report the case of a middle-aged patient without obvious risk factors for atherosclerosis who had SCI from right VAD. CASE PRESENTATION An otherwise healthy 40-year-old man presented with acute right-sided body weakness. Six days earlier, he had experienced posterior neck pain without obvious inducement. Neurologic examination revealed a right Brown-Séquard syndrome. Magnetic resonance imaging (MRI) of the head was normal. Further, cervical spine MRI showed spinal cord infarction (SCI) on the right at the C1-C3 level. Three-dimensional high-resolution MRI (3D HR-MRI) volumetric isotropic turbo spin echo acquisition (VISTA) scan showed evidence of vertebral artery dissection (VAD). The patient was significantly relieved of symptoms and demonstrated negative imaging findings after therapy with anticoagulation (AC) and antiplatelets (AP) for 3 months. CONCLUSIONS The possibility of vertebral artery dissection (VAD) should be considered in the case of young and middle-aged patients without obvious risk factors for atherosclerosis. Furthermore the VISTA black blood sequence plays an important role in the pathological diagnosis of vertebral artery stenosis. Early correct diagnosis and active therapy are crucial to the prognosis.
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Affiliation(s)
- Yang-Yang Meng
- Department of Radiology, the First Hospital of JiLin University, Xinmin St. #71, Changchun, 130021, China
| | - Le Dou
- Department of Radiology, the First Hospital of JiLin University, Xinmin St. #71, Changchun, 130021, China
| | - Chun-Mei Wang
- Department of Radiology, the First Hospital of JiLin University, Xinmin St. #71, Changchun, 130021, China
| | - De-Zheng Kong
- Department of Radiology, the First Hospital of JiLin University, Xinmin St. #71, Changchun, 130021, China
| | - Ying Wei
- Department of Radiology, the First Hospital of JiLin University, Xinmin St. #71, Changchun, 130021, China
| | - Li-Shan Wu
- Department of Radiology, the First Hospital of JiLin University, Xinmin St. #71, Changchun, 130021, China
| | - Yi Yang
- Department of Neurology, Stroke Center, Neuroscience Center & Clinical Trail and Research Center for Stroke, the First Hospital of JiLin Universit, Xinmin St. #71, Changchun, 130021, China.
| | - Hong-Wei Zhou
- Department of Radiology, the First Hospital of JiLin University, Xinmin St. #71, Changchun, 130021, China.
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Kong DZ, Lian YH, Wang LJ, Wang CM, Meng YY, Zhou HW. Central nervous system vasculopathy caused by Fabry disease: a case report. BMC Neurol 2019; 19:115. [PMID: 31170963 PMCID: PMC6551893 DOI: 10.1186/s12883-019-1348-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 05/31/2019] [Indexed: 12/02/2022] Open
Abstract
Background Fabry disease is rare, and the diagnosis is often delayed. Here, we describe a case of Fabry disease resulting in vasculopathy of the central nervous system. Magnetic resonance (MR) black-blood sequence (three-dimensional T1 volumetric isotropic turbo spin echo acquisition), with the unique advantage of imaging the vascular wall, facilitated a clear identification of the vasculopathy. Case presentation A 27-year-old man visited our hospital for the treatment of “ double vision 6d.” After a series of examinations, the patient was diagnosed with Fabry disease, which caused vasculopathy of the central nervous system. Subsequently, the patient was treated with corticosteroids and his symptoms were attenuated. Two months after the initial treatment, the initial lesion in the vascular vessel disappeared, however, a new lesion appeared. Similarly, four months after the initial treatment, although the previous lesion disappeared, a new lesion appeared. Conclusions This case highlights that clinicians should use MR black-blood sequence scan in a timely manner in case of young patients with migratory lesions of brain. In case of detection of a vascular lesion in combination with other systemic lesions, the possibility of Fabry disease should be considered.
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Affiliation(s)
- De-Zheng Kong
- Department of Radiology, The First Hospital of Jilin University, Xinmin St. #71, Changchun, 130021, China
| | - Ya-Hui Lian
- Department of Radiology, The First Hospital of Jilin University, Xinmin St. #71, Changchun, 130021, China
| | - Lin-Jing Wang
- Department of Radiology, The First Hospital of Jilin University, Xinmin St. #71, Changchun, 130021, China
| | - Chun-Mei Wang
- Department of Radiology, The First Hospital of Jilin University, Xinmin St. #71, Changchun, 130021, China
| | - Yang-Yang Meng
- Department of Radiology, The First Hospital of Jilin University, Xinmin St. #71, Changchun, 130021, China
| | - Hong-Wei Zhou
- Department of Radiology, The First Hospital of Jilin University, Xinmin St. #71, Changchun, 130021, China.
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Abstract
The objective of this study was to clone the full-length cDNA of the APETALA1 (AP1) gene from lotus and analyze its sequence and expression pattern. The full-length cDNA sequence of the NnAP1 gene was amplified from the petals of Nelumbo nucifera 'Hongxia' using RT-PCR and rapid amplification of cDNA ends. Bioinformatic methods were used to analyze the sequence characteristics of the gene. Quantitative real-time PCR methods were used to investigate the expression pattern of NnAP1 in various organs and during different developmental stages. The cloned full-length NnAP1 cDNA (GenBank accession No. KF361315) was 902 bp, containing a 795-bp open reading frame encoding 264 amino acids with a relative molecular mass of 30,288.4 and an isoelectric point of 9.13. NnAP1 had a MADS-box domain and a K-box domain, which is typical of the SQUA/AP1 gene family. A protein sequence identity search showed that NnAP1 was 75-96% similar to other plant AP1s. Phylogenetic tree analysis indicated that NnAP1 was very closely related to AP1 of Glycine max, suggesting that they shared the same protein ancestor. Quantitative real-time PCR analysis showed that NnAP1 was expressed in various organs during different developmental stages; it had the highest expression in blooming flowers and had trace expression in the young vegetative and flower senescence stages. Our analysis suggests that NnAP1 plays an important role in controlling floral meristem identity and floral organ formation.
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Affiliation(s)
- D Z Kong
- Department of Ornamental Horticulture, College of Forestry, Henan Agricultural University, Zhengzhou, China
| | - X Y Shen
- Department of Ornamental Horticulture, College of Forestry, Henan Agricultural University, Zhengzhou, China
| | - B Guo
- Department of Ornamental Horticulture, College of Forestry, Henan Agricultural University, Zhengzhou, China
| | - J X Dong
- Department of Ornamental Horticulture, College of Forestry, Henan Agricultural University, Zhengzhou, China
| | - Y H Li
- Department of Ornamental Horticulture, College of Forestry, Henan Agricultural University, Zhengzhou, China
| | - Y P Liu
- Department of Ornamental Horticulture, College of Forestry, Henan Agricultural University, Zhengzhou, China
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Zhang KM, Li Z, Li Y, Li YH, Kong DZ, Wu RH. Carbohydrate accumulation may be the proximate trigger of anthocyanin biosynthesis under autumn conditions in Begonia semperflorens. Plant Biol (Stuttg) 2013; 15:991-1000. [PMID: 23578316 DOI: 10.1111/j.1438-8677.2012.00721.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2012] [Accepted: 11/07/2012] [Indexed: 06/02/2023]
Abstract
Many plant leaves appear red in the autumn, and many papers have focused on the environmental factors and role of anthocyanin in this process. However few papers have examined the substances that are induced during this process. We hypothesised that excess sugar accumulation directly induces anthocyanin accumulation under autumn conditions. Using two methods (restricting phloem movement and exogenous sucrose feeding), we found that both surplus photosynthate and exogenous sucrose could induce anthocyanin biosynthesis, corresponding to up-regulation of several enzymes involved in anthocyanin biosynthesis (phenylalanine ammonia lyase, chalcone isomerase, dihydroflavonol 4-reductase and flavonoid 3-O-glucosyl transferase) and in transport (glutathione S-transferase). Our results suggest that excess carbohydrate may be the proximate trigger for induction of anthocyanin biosynthesis in autumn, but only when carbohydrates are accumulated for storage.
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Affiliation(s)
- K M Zhang
- College of Forestry, Henan Agricultural University, Zhengzhou, China
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Reed W, Kong DZ, Lee TH, Cowan MJ, Busch MP, Baxter-Lowe LA. Non-invasive determination of the paternal HLA haplotype of a fetus using kinetic PCR to detect fetal microchimerism in maternal plasma. Bone Marrow Transplant 2002; 29:527-9. [PMID: 11960275 DOI: 10.1038/sj.bmt.1703411] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2001] [Accepted: 01/07/2002] [Indexed: 11/09/2022]
Abstract
Knowledge of fetal HLA type can be important if cord blood (CB) is being considered as a stem cell source for transplantation. The feasibility of determining the paternally inherited HLA haplotype of a fetus was explored through analysis of fetal DNA in the maternal circulation. A 5-year-old child with relapsed acute leukemia was a candidate for transplantation. The HLA type of the fetal sibling was needed to assist with evaluation of this potential cord blood donor. DNA was isolated from maternal plasma and whole blood. Kinetic PCR using sequence-specific primers for paternal HLA-A, -B, and -DRB1 alleles was performed. Alleles corresponding to one paternal haplotype were detectable in plasma, but not in whole blood. Alleles from the alternative haplotype were not detectable. This demonstrated that the fetus shared at least one haplotype with the patient and therefore arrangements were made to bank the CB. The maternal haplotype of the fetus could not be determined in the presence of maternal DNA. The prenatal fetal typing was confirmed by typing the newborn's CB. This rapid non-invasive technique may facilitate the selection of CB units for banking based on needed HLA types.
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Affiliation(s)
- W Reed
- Blood Centers of the Pacific, Irwin Center, Scientific Services Division, San Francisco, CA, USA
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Maselli RA, Kong DZ, Bowe CM, McDonald CM, Ellis WG, Agius MA, Gomez CM, Richman DP, Wollmann RL. Presynaptic congenital myasthenic syndrome due to quantal release deficiency. Neurology 2001; 57:279-89. [PMID: 11468313 DOI: 10.1212/wnl.57.2.279] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To provide clinical, electrophysiologic, and ultrastructural findings in three patients with a presynaptic congenital myasthenic syndrome (CMS). BACKGROUND Familial infantile myasthenia and paucity of synaptic vesicles are the only two fully characterized CMS. We are describing here three patients with another form of presynaptic CMS characterized by deficiency of the action potential-dependent release without reduction of the spontaneous release of neurotransmitter from the nerve terminal. METHODS The authors performed electromyography and anconeus muscle biopsies that included intracellular recordings and electron microscopy of the neuromuscular junction in three patients with presynaptic CMS. They also sequenced part of the P/Q-calcium alpha(1)-subunit gene (CACNA1A) and the acetylcholine receptor subunit (AChR) genes in these patients. RESULTS In these patients there were additional neurologic findings including nystagmus and ataxia. In all three patients the end-plate potential quantal content (m) was markedly reduced but neither the amplitudes nor the frequencies of miniature end-plate potentials were diminished. Ultrastructurally, postsynaptic end-plate folds, nerve terminal size, and synaptic vesicle number were normal but double-membrane-bound sacs containing synaptic vesicles were present in the nerve terminal of all three patients. The screening of reported pathogenic mutations in the CACNA1A and a mutational analysis of AChR subunit genes were negative. CONCLUSION This form of CMS appears to result only from a deficiency of the quantal release of neurotransmitter that may be due to an abnormal calcium mechanism or impaired endocytosis and recycling of synaptic vesicles.
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Affiliation(s)
- R A Maselli
- Neurology Department, University of California, Davis 95616, USA.
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