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Zhu DQ, Tao SM, Tao FB. [Research progress on the impacts of pregnancy and puerperium-related factors on refractive errors in children]. Zhonghua Yu Fang Yi Xue Za Zhi 2024; 58:191-195. [PMID: 38387949 DOI: 10.3760/cma.j.cn112150-20230915-00195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
Refractive error is a common ophthalmic disease in children. It refers to the mismatch between the axial length and the refractive power that results in visual blur, which is usually driven by the interaction of genetic and environmental factors. The impacts of pregnancy and puerperium-related factors on refractive error in children have gradually gained attention. According to the different stages of pregnancy, this review summarizes the impacts of four aspects on refractive error in children, including lifestyle during pregnancy, complications and comorbidities during pregnancy, adverse pregnancy outcomes and other factors, which aims to provide perinatal healthcare clues for the prevention and control of refractive error in children, achieve prevention beforehand and reduce the public health burden of refractive error in children.
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Affiliation(s)
- D Q Zhu
- Department of Maternal, Child & Adolescent Health, School of Public Health, Anhui Medical University, Hefei 230032, China
| | - S M Tao
- Department of Ophthalmology, The Second Affiliated Hospital of Anhui Medical University, Hefei 230601, China
| | - F B Tao
- Department of Maternal, Child & Adolescent Health, School of Public Health, Anhui Medical University, Hefei 230032, China MOE Key Laboratory of Population Health Across Life Cycle/Anhui Provincial Key Laboratory of Environment and Population Health Across the Life Course, Hefei 230032, China
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2
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Zheng G, Li FY, Wang X, Zhu DQ, Zhao ZL, Guo Y. [Correlation analysis and benchmark dose study on bone metabolic biochemical index of low doses of exposed hydrogen fluoride workers]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2023; 41:198-203. [PMID: 37006145 DOI: 10.3760/cma.j.cn121094-20220328-00152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 04/04/2023]
Abstract
Objective: To analyze correlation of occupational hydrogen fluoride exposure to low doses of bone metabolism index through occupational epidemiological investigation and benchmark dose calculation. Methods: In May 2021, using cluster sampling method, 237 workers exposed to hydrogen fluoride in a company were selected as the contact group, and 83 workers not exposed to hydrogen fluoride in an electronics production company were selected as the control group. The external exposure dose and urinary fluoride concentration, blood and urine biochemical indicators of the workers was measured.The relationship between external dose and internal dose of hydrogen fluoride was analyzed. The external dose, urinary fluoride was used as exposure biomarkers, while serum osteocalcin (BGP), serum alkaline phosphatase (AKP) and urinary hydroxyproline (HYP) were used as effect biomarkers for bone metabolism of hydrogen fluoride exposure. The benchmark dose calculation software (BMDS1.3.2) was used to calculate benchmark dose (BMD) . Results: Urine fluoride concentration in the contact group was correlated with creatinine-adjusted urine fluoride concentration (r=0.69, P=0.001). There was no significant correlation between the external dose of hydrogen fluoride and urine fluoride in the contact group (r=0.03, P=0.132). The concentrations of urine fluoride in the contact group and the control group were (0.81±0.61) and (0.45±0.14) mg/L, respectively, and the difference between the two groups was statistically significant (t=5.01, P=0.025). Using BGP, AKP and HYP as effect indexes, the urinary BMDL-05 values were 1.28, 1.47 and 1.08 mg/L, respectively. Conclusion: Urinary fluoride can sensitively reflect the changes in the effect indexes of biochemical indexes of bone metabolism. BGP and HYP can be used as early sensitive effect indexes of occupational hydrogen fluoride exposure.
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Affiliation(s)
- G Zheng
- Occupational Health Guidance Center, Shanghai Institute of Occupational Disease for Chemical Industry, Shanghai 200041, China
| | - F Y Li
- Business Department, Hefei Kanghong Occupational Health Medical Examination Center, Hefei 230088, China
| | - X Wang
- Central Laboratory, Shanghai Institute of Occupational Disease for Chemical Industry, Shanghai 200041, China
| | - D Q Zhu
- Health Care Center, Shanghai Institute of Occupational Disease for Chemical Industry, Shanghai 200041, China
| | - Z L Zhao
- Central Laboratory, Shanghai Institute of Occupational Disease for Chemical Industry, Shanghai 200041, China
| | - Y Guo
- Central Laboratory, Shanghai Institute of Occupational Disease for Chemical Industry, Shanghai 200041, China
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3
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Zhu DQ, Shi P, Shen J, Chen YW, Li F. [Clinical characteristics of anomalous aortic origin of a coronary artery in children]. Zhonghua Er Ke Za Zhi 2023; 61:240-244. [PMID: 36849351 DOI: 10.3760/cma.j.cn112140-20221031-00925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
Objective: To analyze the clinical characteristics, diagnosis and treatment of anomalous aortic origin of a coronary artery (AAOCA) in children. Methods: There were 17 children diagnosed with AAOCA from January 2013 to January 2022 in Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine.Their clinical manifestations, laboratory and imaging data, treatment and prognosis were retrospectively analyzed. Results: These 17 children included 14 males and 3 females, with the age of (8.7±3.5) years. There were 4 anomalous left coronary artery (ALCA) and 13 anomalous right coronary artery (ARCA). Seven children presented with chest pain or chest pain after exercise, three patients presented with cardiac syncope, one complained chest tightness and weakness, and the other six patients had no specific symptoms. Cardiac syncope and chest tightness occurred in patients with ALCA. Fourteen children had the dangerous anatomical basis of myocardial ischemia caused by coronary artery compression or stenosis on imaging. Seven children had coronary artery repair, of whom two were ALCA and five were ARCA. One patient had received heart transplantation because of heart failure. The incidence of adverse cardiovascular events and poor prognosis in ALCA group was higher than that in ARCA group (4/4 vs. 0/13, P<0.05). They were followed up in the outpatient department regularly for 6 (6, 12) months; except for the one who lost visit, the rest of the patients had a good prognosis. Conclusions: Cardiogenic syncope or cardiac insufficiency usually occurs in ALCA, and adverse cardiovascular events and poor prognosis are more common in ALCA than in ARCA. Early surgical treatment should be considered for children with ALCA and ARCA accompanied by myocardial ischemia.
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Affiliation(s)
- D Q Zhu
- Department of Pediatric Cardiology, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - P Shi
- Department of Pediatric Cardiology, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - J Shen
- Department of Pediatric Cardiology, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - Y W Chen
- Department of Pediatric Cardiology, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - F Li
- Department of Pediatric Cardiology, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
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Chen YW, Ji W, Zhu DQ, Li F. [Efficacy and safety of implantable cardioverter-defibrillator implantation in pediatric tachycardia cases]. Zhonghua Er Ke Za Zhi 2020; 58:905-909. [PMID: 33120462 DOI: 10.3760/cma.j.cn112140-20200408-00361] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To analyze the indication, efficacy and complications of implantable cardioverter-defibrillator (ICD) implantation in children with severe tachycardia. Methods: The retrospective study collected the clinical data of 6 patients who accepted ICD implantation in Shanghai Children's Medical Center from January 2009 to January 2020. The etiologies of tachycardia, procedure of the ICD implantation and the operation associated complications were analyzed. Results: The 6 patients aged from 6 years and 5 months to 16 years and 2 months, and their weight were from 15.4 kg to 49.8 kg. Three patients were diagnosed with long QT syndrome, and the remaining three with catecholaminergic polymorphic ventricular tachycardia, hypertrophic cardiomyopathy and lethal cardiac channelopathy, respectively. All the patients suffered from drug-resistant ventricular tachycardia or ventricular vibration before the operation. After the ICD implantation, 3 patients had electric storm, which was alleviated after analgesics-sedatives treatment with chlorpromazine, dexmedetomidine or midazolam combined with fentanyl, as well as reset of the ICD parameters and support from psychological consultation. The other 3 patients did not undergo any complications as the above comprehensive strategies were given after the operation prophylactically. All patients continued anti-arrhythmic medicine after the operation and all survived at the end of the follow-up period lasted from 1 month to 7 years. Two patients had ventricular tachycardia (VT) and ventricular vibration, which were successfully recognized and defibrillated by ICD. Conclusions: ICD implantation is safe and effective in children and adolescent patients. The electric storm may happen after operation, which could be prevented by the comprehensive strategies including appropriate ICD parameter-setting, analgesics-sedatives treatment and psychological support.
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Affiliation(s)
- Y W Chen
- Department of Cardiology, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - W Ji
- Department of Cardiology, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - D Q Zhu
- Department of Cardiology, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - F Li
- Department of Cardiology, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
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Yang JB, Zhu DQ, Shao M, Li AW, Liu ZR, Gao RJ, Liu SY, Lou DD, Lyu Y, Fan Q. [Effects of Shengmai Jianghuang San on intestinal flora in nude mice with radio resistant cells of nasopharyngeal carcinoma]. Zhongguo Zhong Yao Za Zhi 2019; 44:553-558. [PMID: 30989922 DOI: 10.19540/j.cnki.cjcmm.20181203.001] [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] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Modern pharmacological studies have shown that Shengmai San has the effects of enhancing immunity and improving blood circulation, and Curcumae Longae Rhizoma(Jianghuang) has anti-inflammatory, anti-cancer, anti-oxidation and other functions. Shengmai San combined with Jianghuang is a new research direction in the study of anti-tumor of traditional Chinese medicines. The main treatment for nasopharyngeal carcinoma is radiation therapy, but radiation therapy can cause a variety of side effects, and it also changes the composition of the intestinal flora. In this study, the 16 s rDNA sequencing platform was used to perform macro-sequence sequencing of the intestinal flora samples of nude mice bearing the veins of Shengmai Jianghuang San, and then the results of intestinal flora data were analyzed to investigate the effect of Shengmai Jianghuang San on tumors. The results showed that Shengmai Jianghuang San combined with irradiation could enhance the therapeutic effect of tumor treatment. Radiation therapy would reduce the total number and diversity of intestinal flora in nude mice, and also change the structure of the flora. Shengmai Jianghuang San could protect the diversity of colonies, and also partially restore the colony imbalance caused by irradiation. This study provides a research idea for Shengmai Jianghuang San as a sensitizing adjuvant for radiotherapy of nasopharyngeal carcinoma.
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Affiliation(s)
- Jia-Bin Yang
- School of Traditional Chinese Medicine,Southern Medical University Guangzhou 510515,China
| | - Dao-Qi Zhu
- School of Traditional Chinese Medicine,Southern Medical University Guangzhou 510515,China
| | - Meng Shao
- School of Traditional Chinese Medicine,Southern Medical University Guangzhou 510515,China
| | - Ai-Wu Li
- Nanfang Hospital,Southern Medical University Guangzhou 510515,China
| | - Zhao-Ru Liu
- Nanfang Hospital,Southern Medical University Guangzhou 510515,China
| | - Rui-Jiao Gao
- School of Traditional Chinese Medicine,Southern Medical University Guangzhou 510515,China
| | - Shi-Ya Liu
- School of Traditional Chinese Medicine,Southern Medical University Guangzhou 510515,China
| | - Dan-Dan Lou
- School of Traditional Chinese Medicine,Southern Medical University Guangzhou 510515,China
| | - Ying Lyu
- Nanfang Hospital,Southern Medical University Guangzhou 510515,China
| | - Qin Fan
- School of Traditional Chinese Medicine,Southern Medical University Guangzhou 510515,China
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Liu QK, Zhu DQ, Tan XC, Yuan PQ, Cheng ZM, Yuan WK, Yang JY. Lumped reaction kinetic models for pyrolysis of heavy oil in the presence of supercritical water. AIChE J 2015. [DOI: 10.1002/aic.14978] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Qing-Kun Liu
- State Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 China
| | - Dao-Qi Zhu
- State Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 China
| | - Xue-Cai Tan
- State Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 China
| | - Pei-Qing Yuan
- State Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 China
| | - Zhen-Min Cheng
- State Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 China
| | - Wei-Kang Yuan
- State Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 China
| | - Jing-Yi Yang
- Research Institute of Petroleum Processing, East China University of Science and Technology; Shanghai 200237 China
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7
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Zhang DS, Liu YL, Zhu DQ, Huang XJ, Luo CH. Point application with Angong Niuhuang sticker protects hippocampal and cortical neurons in rats with cerebral ischemia. Neural Regen Res 2015; 10:286-91. [PMID: 25883629 PMCID: PMC4392678 DOI: 10.4103/1673-5374.152384] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [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] [Accepted: 07/02/2014] [Indexed: 11/04/2022] Open
Abstract
Angong Niuhuang pill, a Chinese materia medica preparation, can improve neurological functions after acute ischemic stroke. Because of its inconvenient application and toxic components (Cinnabaris and Realgar), we used transdermal enhancers to deliver Angong Niuhuang pill by modern technology, which expanded the safe dose range and clinical indications. In this study, Angong Niuhuang stickers administered at different point application doses (1.35, 2.7, and 5.4 g/kg) were administered to the Dazhui (DU14), Qihai (RN6) and Mingmen (DU4) of rats with chronic cerebral ischemia, for 4 weeks. The Morris water maze was used to determine the learning and memory ability of rats. Hematoxylin-eosin staining and Nissl staining were used to observe neuronal damage of the cortex and hippocampal CA1 region in rats with chronic cerebral ischemia. The middle- and high-dose point application of Angong Niuhuang stickers attenuated neuronal damage in the cortex and hippocampal CA1 region, and improved the memory of rats with chronic cerebral ischemia with an efficacy similar to interventions by electroacupuncture at Dazhui (DU14), Qihai (RN6) and Mingmen (DU4). Our experimental findings indicate that point application with Angong Niuhuang stickers can improve cognitive function after chronic cerebral ischemia in rats and is neuroprotective with an equivalent efficacy to acupuncture.
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Affiliation(s)
- Dong-Shu Zhang
- College of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong Province, China
| | - Yuan-Liang Liu
- College of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong Province, China
| | - Dao-Qi Zhu
- College of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong Province, China
| | - Xiao-Jing Huang
- College of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong Province, China
| | - Chao-Hua Luo
- College of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong Province, China
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Zhu DQ, Zou Q, Hu CH, Su JL, Zhou GH, Liu P. XRCC1 genetic polymorphism acts a potential biomarker for lung cancer. Tumour Biol 2015; 36:3745-50. [PMID: 25563194 DOI: 10.1007/s13277-014-3014-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Accepted: 12/23/2014] [Indexed: 12/14/2022] Open
Abstract
Lung cancer is one of the most common but serious cancers in the world. Both the X-ray repair cross-complementing group 1 (XRCC1) gene and the human multidrug resistance 1 (MDR1) gene are important candidate genes influencing the susceptibility to various diseases, including lung cancer. This study aimed to assess the correlation of genetic polymorphisms in XRCC1 and MDR1 with the susceptibility to lung cancer. In this study, a total of 320 lung cancer patients and 346 cancer-free controls in Chinese population were enrolled in this study. Data about the clinical characteristics and related risk factors of lung cancer were collected by questionnaires. The single-nucleotide polymorphisms (SNPs) of XRCC1 and MDR1 genes were genotyped by created restriction site-polymerase chain reaction method. Our data showed that the risk for lung cancer increased significantly among the variant Arg194Trp (C > T, rs1799782) and Arg399Gln (G > A, rs25487) of XRCC1, but there are no significant differences in the allelic and genotypic frequencies of c.1564A > T and c.3073A > C of MDR1 between lung cancer patients and cancer-free controls. In conclusion, these preliminary results suggest that the C > T, rs1799782 and C > T, rs25487 of XRCC1 genetic variants might be used as molecular markers for detecting lung cancer susceptibility.
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Affiliation(s)
- Dao-Qi Zhu
- Department of Oncology, Second Xiangya Hospital, Central South University, No. 139 Renmin Middle Road Avenue, Changsha, Hunan, 410011, China
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9
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Tan XC, Liu QK, Zhu DQ, Yuan PQ, Cheng ZM, Yuan WK. Pyrolysis of heavy oil in the presence of supercritical water: The reaction kinetics in different phases. AIChE J 2014. [DOI: 10.1002/aic.14677] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Xue-Cai Tan
- State Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 P.R. China
| | - Qing-Kun Liu
- State Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 P.R. China
| | - Dao-Qi Zhu
- State Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 P.R. China
| | - Pei-Qing Yuan
- State Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 P.R. China
| | - Zhen-Min Cheng
- State Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 P.R. China
| | - Wei-Kang Yuan
- State Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 P.R. China
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Abstract
It has been established that health professionals' smoking and physical activity influence their related health-promoting behaviours, but it is unclear whether health professionals' weight status also influences their related professional practices. A systematic review was conducted to understand the relationship between personal weight status and weight management practices. Nine eligible studies were identified from a search of the Cochrane Library, MEDLINE, EMBASE, PsycINFO, CINAHL and Chinese databases. All included studies were cross-sectional surveys employing self-reported questionnaires. Weight management practice variables studied were classified under six practice indicators, developed from weight management guidelines. Syntheses of the findings from the selected studies suggest that: normal weight doctors and nurses were more likely than those who were overweight to use strategies to prevent obesity in-patients, and, also, provide overweight or obese patients with general advice to achieve weight loss. Doctors' and nurses' own weight status was not found to be significantly related to their referral and assessment of overweight or obese patients, and associations with their relevant knowledge/skills and specific treatment behaviours were inconsistent. Additionally, in female, primary care providers, relevant knowledge and training, self-efficacy and a clear professional identity emerged as positive predictors of weight management practices. This review's findings will need to be confirmed by prospective theoretically driven studies, which employ objective measures of weight status and weight management practices and involve multivariate analyses to identify the relative contribution of weight status to weight management.
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Affiliation(s)
- D Q Zhu
- Second Military Medical University, School of Nursing, Shanghai, China
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11
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Nie MY, Zhou LM, Wang QH, Zhu DQ. Enantiomer separation of mandelates and their analogs on cyclodextrin derivative chiral stationary phases by capillary GC. ANAL SCI 2001; 17:1183-7. [PMID: 11990593 DOI: 10.2116/analsci.17.1183] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [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: 11/23/2022]
Abstract
Enantiomer separation of mandelates and their analogs, which are important intermediates in asymmetric synthetic and pharmaceutical chemistry, was investigated by capillary gas chromatography using different cyclodextrin derivative chiral stationary phases (CD CSPs). The used cyclodextrin derivatives included permethylated beta-CD (PMBCD), permethylated gamma-CD, heptakis(2,6-di-O-butyl-3-O-butyryl)-beta-CD, heptakis(2,6-di-O-pentyl-3-O-acetyl)-beta-CD and heptakis(2,6-di-O-nonyl-3-O-trifluoroacetyl)-beta-CD (DNTBCD), respectively. Among all the CSPs used, PMBCD and DNTBCD exhibited the broadest and best enantioselectivity for all the racemates investigated. Some thermodynamic parameters were evaluated and an enthalpy-entropy compensation effect was observed in enantiomer separation processes of mandelates and their analogs. Based on thermodynamic data and molecular mechanics calculations, the chiral recognition mechanism of mandelate derivatives on CD CSPs is discussed.
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Affiliation(s)
- M Y Nie
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, P R China.
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12
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Tang YH, Zhu DQ, Guan YF. [Preparation and evaluation of wide-bore stainless-steel packed capillary liquid chromatographic columns]. Se Pu 2001; 19:289-92. [PMID: 12545482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2023] Open
Abstract
A zero-dead volume column end and a conical shaped slurry reservoir for wide-bore stainless-steel packed capillary liquid chromatographic columns were designed and evaluated. A detailed procedure for the preparation of reversed-phase stainless-steel packed capillary columns with 0.5 mm-1.0 mm i.d. is described. The influences of the column length and the packing material on the column performance have been studied. Columns were evaluated by the reduced plate height vs reduced velocity curve and the peak asymmetric factor. Experimental results showed that the column efficiency and the reproducibility were better than 75% of theoretical value and 6% RSD, respectively. Separations of antiepileptic drugs and chlorinated benzenes are demonstrated.
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Affiliation(s)
- Y H Tang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116012, China
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13
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Miao H, Guan YF, Wang HW, Zhu DQ. [Dynamic pre-concentration method of gas sample]. Se Pu 2001; 19:71-3. [PMID: 12541851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2023] Open
Abstract
By utilizing the combination of frontal chromatography at ambient temperature, back-flushing and temperature gradient thermal desorption, a prototype of a dynamic pre-concentration system has been designed and evaluated. It realized the enrichment for gas samples of boiling point higher than - 103 degrees C without cryogenic facilities. To reduce the sample volume and enhance enrichment factor, the technique of momentarily non-steady state produced at the beginning of back-flushing, and the negative temperature gradient generated during thermal desorption were utilized, resulting a very sharp desorption band. Standard samples were tested to demonstrate the applicability of the method. At 10 mL sample volume, the enrichment factor was 100.
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Affiliation(s)
- H Miao
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116012, China
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14
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Zhu DQ. [Pulmonary X-ray manifestations of necrotizing granulomatosis]. Zhonghua Fang She Xue Za Zhi 1983; 17:249-52. [PMID: 6233110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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15
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Zhu DQ. [Preoperative and postoperative angiography in portal hypertension]. Zhonghua Fang She Xue Za Zhi 1983; 17:94-7. [PMID: 6226510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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16
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Zhu DQ, Dai ZR, Li JC, Jiang ZK. [Studies on piperaquine as long-acting antimalarial drug against Plasmodium berghei in mice]. Yao Xue Xue Bao 1982; 17:894-8. [PMID: 6763837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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17
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Li YT, Hu YG, Huang HZ, Zhu DQ, Huang WJ, Wu DL, Qian YL. Hydroxypiperaquine phosphate in treatment of falciparum malaria. Chin Med J (Engl) 1981; 94:301-2. [PMID: 6788464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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Jiang ZM, Zhu Y, Zeng XJ, Yang NF, Xu BZ, Lu YJ, Chen LY, Zhu DQ. [Certain problems of total parenteral nutrition in clinical practice (author's transl)]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1980; 2:42-6. [PMID: 6449303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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