1.Benzyl Functionalized Ionic Liquid as New Extraction Solvent of Dispersive Liquid-liquid Microextraction for Enrichment of Organophosphorus Pesticides and Aromatic Compounds
Yali WANG ; Liqin YOU ; Yuwen MEI ; Jianping LIU ; Lijun HE
Chinese Journal of Analytical Chemistry 2016;44(6):942-949
A benzyl functionalized ionic liquid, 1-benzyl-3-methylimidazolium bis [( trifluoromethyl ) sulfonyl]imide ([BeMIM][Tf2 N]), was synthesized and characterized as an extraction solvent of dispersive liquid-liquid microextraction ( DLLME) for enrichment and determination of 5 organophosphorus pesticides (phoxim, fenitrothion, chlorpyrifos, phorate and parathion) and 2 aromatic compounds (chloronaphthalene and anthracene) from environmental water samples by high-performance liquid chromatography ( HPLC). [BeMIM] [ Tf2 N] had higher extraction efficiency than 1-octyl-3-methylimidazolium bis [( trifluoromethyl) sulfonyl]imide and common organic solvents such as CCl4 and C2 Cl4 . The extraction was performed using 40 μL of [BeMIM][Tf2N] and 1 mL of methanol as extraction solvent and dispersive solvent respectively with centrifugal time of 5 min. Under the optimal conditions, the method proposed here provided a good linearity for all analytes with correlation coefficients between 0. 9994 and 0. 9998. The repeatability values, described as intra-day and inter-day relative standard deviations (RSDs) of five replicate experiments at three different concentrations of 10, 40 and 100 μg / L, were 1. 1% -4. 3% and 0. 8% -4. 8% , respectively. The limits of detection (LOD) were 0. 01 μg / L-1. 0 μg / L at a signal-to-noise ratio (S / N) of 3. This developed method was convenient and speedy, and could be employed to detect the analytes in three real environmental water samples with satisfactory relative recovery of 82. 7% -118. 3% and RSD of 0. 7% -5. 6% . Introduction of benzyl group into the imidazolium could obviously enhance the extraction efficiecny for analytes due to the π-πinteraction between [BeMIM] [ Tf2 N] and analytes. [ BeMIM] [ Tf2 N] was a satisfactory extraction solvent with a high enrichment factor of 339 and extraction efficiency of 81. 4% . Partition coefficients of all analytes in [BeMIM][Tf2 N]-DLLME system were determined and the extraction mechanism was discussed.
2.The process and inspiration of deinstitutionalization of mental health institutions of USA and other countries
Jun DING ; Dong JIN ; Tiebang LIU ; Zhijian ZHOU ; Liqin YOU ; Hong YANG
Chinese Journal of Hospital Administration 2014;30(8):636-640
During past 50 years,has achieved a great progress and derived some profound lessons worthy of learning and studying for our country.This article introduces the deinstitutionalization processes of mental health institutions,reinstitutionalization and the inspiration for Chinese mental health reform.Introduced the paper are the reform of deinstitutionalization of mental health institutions in USA and some other countries,and the concept of such a reform,pointing out inspirations of such a reform for mental health reform in China.
3.The study on the early diagnosis of hypoxic ischemic encephalopathy (HIE) in the newborns by fuzzy BP neural networks.
Li LIU ; Liqin HUO ; Feng ZHANG ; Chongxun ZHENG ; Jia YOU ; Xining HE ; Jie ZHANG
Journal of Biomedical Engineering 2011;28(4):814-829
This paper is aimed to study a method and feasibility of early diagnostic system using hypoxic ischemic encephalopathy (HIE) in the newborns. Fifteen non-invasive indicators with high sensitivity and specificity were selected for the early diagnosis of HIE on the basis of related researches from the literature and the researches in our laboratory. The diagnostic test was done with 140 cases with the HIE, using the fussy BP neural network experiment system. The initial results showed that the accuracy rate was 100% for the training set and 95% for the testing set, and the error rate was 5%. The data suggested that the fuzzy back-propagation neural networks, with the clinical comprehensive indicators, exhibited a high accuracy for the early diagnosis of HIE. This method provides an objective and convenient new way for the early clinical diagnosis of the HIE.
Algorithms
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Diagnosis, Computer-Assisted
;
methods
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Early Diagnosis
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Female
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Fuzzy Logic
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Humans
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Hypoxia-Ischemia, Brain
;
diagnosis
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Infant, Newborn
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Male
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Neural Networks (Computer)
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Pattern Recognition, Automated
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methods
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Reproducibility of Results
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Sensitivity and Specificity
4.Influence of long non-coding RNA Gm15645 on the podocyte injury in diabetic nephropathy.
Huan WANG ; Guanqiao YOU ; Liqin GUO ; Ke XU ; Yansheng FENG
Chinese Journal of Medical Genetics 2021;38(10):1017-1020
OBJECTIVE:
To explore the influence of long non-coding (lnc) RNA Gm15645 on the podocyte injury in mice with diabetic nephropathy.
METHODS:
Male db/db mice (with Type 2 diabetes) with a genetic background of C57BLKs/J and db/m mice (healthy) born in littermates were randomly divided into three groups. db/db group was injected with lncRNAGm15645 shRNA lentivirus with a podocyte-specific marker NPHS2; db/db blank group was injected with saline, and db/db control group was injected withnon-sense lentivirus. The results of PAS staining, pathological changes of renal tissue, relative expression of GSK-3beta, and podocin expression were compared.
RESULTS:
lncRNAGm15 645 was overexpressed and podocin was down-regulated in the lentivirus overexpressed group. Mesangial cell proliferation, mesangial matrix hyperplasia, thickened basement membrane, widely fused foot process, and podocyte injury were observed by PAS staining. The expression of Gm15645 in the db/db group was significantly lower than that of the db/db blank group and db/db control group (P< 0.05), while the expression of podocin was higher (P< 0.05). Gm15645 was co-stained with podocin in renal tissue, and the target gene was GSK-3beta.
CONCLUSION
lncRNAGm15645 may provide an early biomarker for the occurrence of podocyte injury in diabetic nephropathy. The mechanism may be related to the feedback regulation of GSK-3beta gene.
Animals
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Diabetes Mellitus, Type 2
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Diabetic Nephropathies/genetics*
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Glycogen Synthase Kinase 3 beta
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Male
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Mice
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Podocytes
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RNA, Long Noncoding/genetics*
5.Application of pulse-coupled neural network combined with genetic algorithm on MR images of hypoxic-ischemic encephalopathy.
Li LIU ; Haiying SHI ; Liqin HUO ; Feng ZHANG ; Chongxun ZHENG ; Jia YOU ; Xining HE ; Jie ZHANG
Journal of Biomedical Engineering 2011;28(5):1019-1024
This paper is to provide a basis for the establishment of an early diagnostic system for hypoxic-ischemic encephalopathy (HIE) by performing segmentation and feature extraction of lesions on the MR images of neonatal babies with HIE. The segmentation on MR images of HIE based on the genetic algorithm (GA) combined with a pulse-coupled neural network (PCNN) were carried out. There were better segmentation results by using PCNN segmentation based on GA than PCNN segmentation with fixed parameters. The data suggested that a PCNN based on GA could provide effective assistance for diagnosis and research.
Algorithms
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Female
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Humans
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Hypoxia-Ischemia, Brain
;
diagnosis
;
physiopathology
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Image Processing, Computer-Assisted
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Infant, Newborn
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Magnetic Resonance Imaging
;
methods
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Male
;
Neural Networks (Computer)
6.Effect of self-management education based on nurse-leading on the quality of life in patients with chronic heart failure
Aixue YUE ; Liqin ZHU ; Jiaqian HE ; Ping XU ; Jia YOU ; Zhiying WANG ; Jianmei CHEN ; Jianpei PENG
Chinese Journal of Modern Nursing 2017;23(1):45-48
Objective To evaluate the effect of self-management education based on nurse-leading on the quality of life in patients with chronic heart failure (CHF).Methods Eighty patients with CHF in a tertiary hospital were enrolled in this study,and were divided into the intervention group and the control group randomly,with 40 cases in each group. Patients in the control group received conventional health education, while patients in the intervention group received the self-management education based on nurse-leading. The score of self-management behavior and the quality of life in two groups were evaluated and compared after six months.Results After six months,the score of self-management in the intervention group was (70.83±12.02), and was significantly higher than that in the control group (55.58±6.46) (t=9.675,P<0.05). The score of total quality of life and self-management in the intervention group was significantly higher than that in the control group (P<0.05).Conclusions Self-management education based on nurse-leading can improve the self-management and the quality of life of patients with CHF.