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  • 1
    Online Resource
    Online Resource
    Universe Scientific Publishing Pte. Ltd. ; 2017
    In:  Electronics Science Technology and Application Vol. 4, No. 1 ( 2017-07-21)
    In: Electronics Science Technology and Application, Universe Scientific Publishing Pte. Ltd., Vol. 4, No. 1 ( 2017-07-21)
    Abstract: 〈 p 〉 Soil ,the carrier of agricultural production and important part of the ecological environment, is heavily contaminated with hazards heavy metals. Therefore, it is oblige to research analytical techniques that could efficiently determine the total content of heavy metals in soil. The determination of heavy metals in soil was disturbed by matrix elements or spectral interferences . In this study , this problem was solved by internal standard method . GBW07402、GBW07448、GBW07423、GBW07428、GBW074079 soil sample were chosen to be the Certified Reference Materials, soils was prepared by microwave digestion with mixed acid following analyzed for determination the content(Cr,Cu, Pb,Ba,Ni,Mn ) by Inductively coupled plasma mass spectrometric in 50ug/L internal standard concentration, the method was validated by compared with certified values 、method contrast(standard addition method versus internal standard method scan the same prepared solution ) and recovery check. The results of internal standard method are in excellent agreement with the indicative values and the date obtained from standard addition method, respectively. Recoveries were adequate being in the acceptable range of 90-99% and RSD of & lt;6.7 % for all the elements at three level of 5,20 and 50mg/kg with quantified by standard addition method and internal standard method .Finally, The graphy of quality control(n=100)were obtained to guide internal quality control in laboratory 〈 /p 〉
    Type of Medium: Online Resource
    ISSN: 2424-8460 , 2251-2608
    Language: Unknown
    Publisher: Universe Scientific Publishing Pte. Ltd.
    Publication Date: 2017
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  • 2
    In: Frontiers in Earth Science, Frontiers Media SA, Vol. 9 ( 2021-4-22)
    Abstract: Diagenetic evolution is an important controlling factor of shale gas reservoirs. In this study, based on field outcrop and drilling core data, analytical techniques including X-ray diffraction (XRD), field emission scanning electron microscope combined with a focused ion beam (FIB-FESEM), and energy-dispersive spectroscopy (EDS) analyses were performed to determine the diagenetic evolution of the Longmaxi Formation shale and reveal the effect of diagenetic evolution on the shale gas exploration and development in the Sichuan Basin, Southwest China. The eodiagenesis phase was subdivided into two evolution stages, and the mesodiagenesis phase was subdivided into three evolution stages in the basin margin and center. Absorbed capacity and artificial fracturing effect of the Longmaxi Formation shale gas were related to mineral composition, which was influenced by sedimentary characteristics and diagenetic evolution. The diagenetic system in the basin margin was more open than that in the basin center due to a different burial history. The more open diagenetic system, with more micro-fractures and soluble constitute (e.g., feldspar), was in favor for the formation and preservation of secondary dissolved pores and organic pores in the basin margin. The relatively closed diagenetic system with stronger compaction resulted in deformation of pore space in the central basin.
    Type of Medium: Online Resource
    ISSN: 2296-6463
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2021
    detail.hit.zdb_id: 2741235-0
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  • 3
    In: Frontiers in Physiology, Frontiers Media SA, Vol. 13 ( 2022-8-8)
    Abstract: Background: Electrocardiogram (ECG) and carotid ultrasound (CUS) are important tools for the diagnosis and prediction of cardiovascular disease (CVD). This study aimed to investigate the associations between ECG and CUS parameters and explore the feasibility of assessing carotid health with ECG. Methods: This cross-sectional cohort study enrolled 319 healthy Chinese subjects. Standard 12-lead ECG parameters (including the ST-segment amplitude [STA]), CUS parameters (intima-media thickness [IMT] and blood flow resistance index [RI]), and CVD risk factors (including sex, age, and systolic blood pressure [SBP] ) were collected for analysis. Participants were divided into the high-level RI group (average RI ≥ 0.76, n = 171) and the normal RI group (average RI & lt; 0.76, n = 148). Linear and stepwise multivariable regression models were performed to explore the associations between ECG and CUS parameters. Results: Statistically significant differences in sex, age, SBP, STA and other ECG parameters were observed in the normal and the high-level RI group. The STA in lead V 3 yielded stronger significant correlations (r = 0.27–0.42, p & lt; 0.001) with RI than STA in other leads, while ECG parameters yielded weak correlations with IMT (|r| ≤ 0.20, p & lt; 0.05). STA in lead V 2 or V 3 , sex, age, and SBP had independent contributions ( p & lt; 0.01) to predicting RI in the stepwise multivariable models, although the models for IMT had only CVD risk factors (age, body mass index, and triglyceride) as independent variables. The prediction model for RI in the left proximal common carotid artery (CCA) had higher adjusted R 2 (adjusted R 2 = 0.31) than the model for RI in the left middle CCA (adjusted R 2 = 0.29) and the model for RI in the right proximal CCA (adjusted R 2 = 0.20). Conclusion: In a cohort of healthy Chinese individuals, the STA was associated with the RI of CCA, which indicated that ECG could be utilized to assess carotid health. The utilization of ECG might contribute to a rapid screening of carotid health with convenient operations.
    Type of Medium: Online Resource
    ISSN: 1664-042X
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2022
    detail.hit.zdb_id: 2564217-0
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  • 4
    Online Resource
    Online Resource
    Frontiers Media SA ; 2017
    In:  Frontiers in Cellular and Infection Microbiology Vol. 7 ( 2017-03-16)
    In: Frontiers in Cellular and Infection Microbiology, Frontiers Media SA, Vol. 7 ( 2017-03-16)
    Type of Medium: Online Resource
    ISSN: 2235-2988
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2017
    detail.hit.zdb_id: 2619676-1
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  • 5
    In: Frontiers in Public Health, Frontiers Media SA, Vol. 9 ( 2021-10-13)
    Abstract: Objective: To determine the relationship between the health literacy of patients with diabetes mellitus (DM) and the accessibility of internet surfing for information concerning DM. Methods: A multistage stratified sampling method was utilized to conduct a questionnaire survey on DM health literacy and internet accessibility among 1,563 patients with DM in Gansu Province in 2020. Logistic regression was performed to analyze the factors that influence health literacy and internet accessibility; while the chi-square test was used to compare the differences in needs. Results: Among 1,563 valid questionnaires collected with an effective rate of 95.7%, there were 65.4, 66.3, or 51.1% of patients with DM were found to have good health knowledge, attitudes, or practice levels, respectively. Occupation, income, disease course of DM, and accessibility to the internet were the main factors influencing health literacy. Age, residency, occupation, education, income, and family history of DM were the factors influencing accessibility to internet surfing for DM. The expectations from patients with DM for the capacity to obtain DM information from traditional sources or through internet sources was 1,465 (93.7%) or 1,145 (73.3%), respectively. Patients with DM had a 2-fold higher desire to obtain DM health information from internet media if the patients had access to the internet than those without ( P & lt; 0.05). Conclusions: The socioeconomic status and access to the internet were the main contributing factors for health literacy, as socioeconomic status is closely related to access to the internet.
    Type of Medium: Online Resource
    ISSN: 2296-2565
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2021
    detail.hit.zdb_id: 2711781-9
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  • 6
    Online Resource
    Online Resource
    Frontiers Media SA ; 2021
    In:  Frontiers in Public Health Vol. 9 ( 2021-8-16)
    In: Frontiers in Public Health, Frontiers Media SA, Vol. 9 ( 2021-8-16)
    Abstract: Objective: From the health care and societal perspectives, this study aimed to evaluate the clinical and economic effects of acupuncture as an adjunctive therapy for patients receiving methadone maintenance treatment (MMT). Methods: We conducted a parallel-arm RCT in China in 2019. Patients were included who met the diagnostic criteria and receive MMT for more than 30 days. Patients were randomly assigned to the exposed group (acupuncture plus MMT) or control group (MMT) at a 1:1 ratio. Daily methadone dosage, drug cravings using the VAS score, and insomnia using the Pittsburgh Sleep Quality Index (PSQI) were chosen as the effectiveness indexes, and the quality-adjusted life years (QALYs) was chosen as the utility index. Results: Overall, 123 patients were included. The exposed group was significantly ( P & lt; 0.05) better than the control group in the improvement of daily methadone dosage (17.68 vs. 1.07), VAS (38.27 vs. 2.64), and PSQI (2.18 vs. 0.30). The QALY was 0.0784 (95%CI: 0.0761–0.0808) for the exposed group and 0.0762 (95%CI: 0.0738–0.0787) for the control group. The total cost of the exposed group (2869.50 CNY) was higher than the control group (2186.04 CNY). The ICER of daily methadone dosage (41.15), VAS (17.86), and PSQI (313.51) were shown to be economically efficient. While ICUR (310,663.64 CNY/QYLY) was higher than the cost suggested by WHO. Conclusion: Acupuncture as an adjuvant therapy for MMT patients realizes its cost-effectiveness by reducing the dosage of methadone, improving drug cravings, and alleviating insomnia. It helps to improve quality of life, but since its cost exceeds what society is willing to pay, further study is needed.
    Type of Medium: Online Resource
    ISSN: 2296-2565
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2021
    detail.hit.zdb_id: 2711781-9
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  • 7
    Online Resource
    Online Resource
    Institute of Electrical and Electronics Engineers (IEEE) ; 2023
    In:  IEEE Transactions on Neural Systems and Rehabilitation Engineering Vol. 31 ( 2023), p. 1837-1846
    In: IEEE Transactions on Neural Systems and Rehabilitation Engineering, Institute of Electrical and Electronics Engineers (IEEE), Vol. 31 ( 2023), p. 1837-1846
    Type of Medium: Online Resource
    ISSN: 1534-4320 , 1558-0210
    Language: Unknown
    Publisher: Institute of Electrical and Electronics Engineers (IEEE)
    Publication Date: 2023
    detail.hit.zdb_id: 2021739-0
    SSG: 12
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  • 8
    Online Resource
    Online Resource
    Walter de Gruyter GmbH ; 2011
    In:  Clinical Chemistry and Laboratory Medicine Vol. 49, No. 10 ( 2011-01-01)
    In: Clinical Chemistry and Laboratory Medicine, Walter de Gruyter GmbH, Vol. 49, No. 10 ( 2011-01-01)
    Type of Medium: Online Resource
    ISSN: 1437-4331 , 1434-6621
    Language: Unknown
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2011
    detail.hit.zdb_id: 1492732-9
    SSG: 15,3
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