Preparation of ortho-symmetric double (OSD) Z-scheme SnO2\CdSe/ Bi2O3 sonocatalyst by ultrasonic-assisted isoelectric point method for effective degradation of organic pollutants

Siyi Li,Meng Zhang,Xue Ma,Jing Qiao,Hongbo Zhang,Jun Wang,Youtao Song 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.72 No.-

In this work, an ortho-symmetric double (OSD) Z-scheme SnO2\CdSe/Bi2O3 sonocatalyst is skillfullydesigned and synthesized via ultrasonic-assisted isoelectric point method and then the sonocatalyticactivity is studied under ultrasonic irradiation in the degradation of organic contaminants. The effects ofultrasonic irradiation time, sonocatalyst dosage, initial Rhodamine B concentration, organic dye kind andused times are investigated systemically. The formation of OH and h+ are confirmed by using t-BuOH andoxalate, respectively. The Rhodamine B can completely be degraded under given experimental conditionssuch as 10 mg/L Rhodamine B solution, 1.00 g/L OSD Z-scheme SnO2\CdSe/Bi2O3 dosage and 150 minultrasonic process. The formation of mainly intermediate products is studied by Liquid Chromatography–Mass Spectrometry. Moreover, the sonocatalytic reaction mechanism caused by OSD Z-schemeSnO2\CdSe/Bi2O3 is presented.

A Nomogram for Predicting the Infectious Disease-specific Health Literacy of Older Adults in China

Qinghua Zhang,Jinyu Yin,Yujie Wang,Li Song,Tongtong Liu,Shengguang Cheng,Siyi Shang 한국간호과학회 2024 Asian Nursing Research Vol.18 No.2

PurposeTo identify the predictors of infectious disease-specific health literacy (IDSHL), and establish an easy-to-apply nomogram to predict the IDSHL of older adults. MethodsThis cross-sectional study included 380 older adults who completed the IDSHL, self-rated health, socio-demographic and other questionnaires. Logistic regression was used to identify the IDSHL predictors. Nomogram was used to construct a predictive model. ResultsUp to 70.1% of older adults had limited IDSHL. Age, education, place of residence, self-rated health, and Internet access were the important influencing factors of IDSHL. The established nomogram model showed high accuracy (receiver operating characteristic curve: 0.848). ConclusionsThe IDSHL of Chinese older adults was significantly deficient. The constructed nomogram is an intuitive tool for IDSHL prediction that can not only contribute toward rapid screening of high-risk older adults with limited IDSHL but also provide guidance for healthcare providers to develop prevention strategies for infectious diseases.

Catalytic performance of amino acid/phosphotungstic acid as bi-functional heterogeneous catalyst for biodiesel production

Qingyu Zhang,Xiaoling Duan,Siyi Tang,Cunwen Wang,Weiguo Wang,Weiliang Feng,Tielin Wang 대한환경공학회 2023 Environmental Engineering Research Vol.28 No.1

In this study, a series of acid-base bi-functional catalysts were prepared by mixing different amounts of basic amino acids (AAs) and phosphotungstic acid (PTA), which exhibited the excellent performance in catalyzing conversion of oleic acid (OA) for the biodiesel production. The physicochemical properties of the catalysts were characterized and analyzed using modern testing techniques and characterization methods such as XRD, FT-IR, XPS, SEM, TEM, and Hammett titration. The various influence parameters were optimized using the central composite design based the response surface methodology, where the maximum biodiesel yield of 97.0% was achieved at the MeOH/OA molar ratio of 5.9, the catalyst loading of 8%, reaction time of 6 h, and reaction temperature of 65℃. Furthermore, the stability and reusability of the prepared catalyst were also demonstrated. At last, the possible catalytic mechanism of the prepared catalyst was comprehensively described.

A highly active Z-scheme NiGa2O4/anthraquinone/MoO3 photocatalyst via charge transfer for sunlight photocatalytic simultaneous conversions of nitrite and sulfite

Xue Ma,Siyi Li,Zhihui Qu,Meng Zhang,Jing Qiao,Xin Cui,Chunquan Wang,Jun Wang,Youtao Song 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.78 No.-

The separation efficiency of photogenerated electron-hole pairs (e –h+) is an important factor for ahighly photocatalytic activity of Z-scheme photocatalytic system. In order to suppress the recombining ofphotogenerated e and h+ and enhance the electron transfer rate, anthraquinone (AQ) as special electrontransfer channel is combined with NiGa2O4 and MoO3, forming a Z-scheme NiGa2O4/AQ/MoO3photocatalyst. Due to unique chemical and physical properties, AQ provides a novel electron transmissionway. Compared with traditional conductive channels (for example, noble metals and graphene), in thisway, the AQ may greatly enhance the electron transfer efficiency. In addition, the related morphology,optical properties and chemical composition were investigated by a sequence of characterizationmethods. The influences of photocatalyst species, irradiation time and used times in simultaneouslyconverting nitrite and sulfite under simulated sunlight were also studied. The results indicate that theprepared Z-scheme NiGa2O4/AQ/MoO3 photocatalyst exhibits a much high activity. The conversion ratesof nitrite and sulfite can reach 89.81% and 94.47%, respectively, under simulated sunlight irradiation forfour hours. The enhanced photocatalytic activity is attributed to the fact that AQ can rapidly transferelectron by inner charge transfer. This charge transfer way can provide a new idea to design subsequentphotocatalysts.

Detection of Spinal Muscular Atrophy Using a Duplexed Real-Time PCR Approach With Locked Nucleic Acid-Modified Primers

Pan Jianyan,Zhang Chunhua,Teng Yanling,Zeng Sijing,Chen Siyi,Liang Desheng,Li Zhuo,Wu Lingqian 대한진단검사의학회 2021 Annals of Laboratory Medicine Vol.41 No.1

Background: Spinal muscular atrophy (SMA) is an autosomal recessive neuromuscular disorder mainly caused by homozygous deletions that include exon 7 of the survival motor neuron 1 (SMN1) gene. A nearby paralog gene, SMN2, obstructs the specific detection of SMN1. We optimized a duplexed real-time PCR approach using locked nucleic acid (LNA)-modified primers to specifically detect SMN1. Methods: An LNA-modified primer pair with 3´ ends targeting SMN1 specific sites c.835-44g and c.840C was designed, and its specificity was examined by real-time PCR and Sanger Sequencing. A duplexed real-time PCR approach for amplifying SMN1 and control gene albumin (ALB) was developed. A randomized double-blind trial with 97 fresh peripheral blood samples and 25 dried blood spots (DBS) was conducted to evaluate the clinical efficacy of the duplexed approach. This new approach was then used to screen 753 newborn DBS. Results: The LNA-modified primers exhibited enhanced specificity and 6.8% increased efficiency for SMN1 amplification, compared with conventional primers. After stabilizing the SMN1 test by optimizing the duplexed real-time PCR approach, a clinical trial validated that the sensitivity and specificity of our new approach for detecting SMA patients and carriers was 100%. Using this new approach, 15 of the screened 753 newborns were identified as carriers via DBS, while the rest were identified as normal individuals. These data reveal a carrier rate of 1.99% in Hunan province, South Central China. Conclusions: We have developed a novel, specific SMN1 detection approach utilizing real-time PCR with LNA-modified primers, which could be applied to both prenatal carrier and newborn screening.

Metabolism Characteristics of Mycoplasma pneumoniae Infection in Asthmatic Children

Luo Jiaying,Chen Huian,Zhang Qiyong,Huang Xinyun,Qin Xu,Li Jing,Chen Siyi,Xiao Yongxin,Sun Lihong,Sun Baoqing 대한천식알레르기학회 2022 Allergy, Asthma & Immunology Research Vol.14 No.6

Purpose: Studies have shown that Mycoplasma pneumoniae (Mp) infection can aggravate symptoms in asthmatics. However, the mechanism by which Mp infection exacerbates asthma remains unclear. Metabolomics can help identify the mechanism of Mp aggravating asthma in children, thereby providing more a potential target for improving clinical treatment programs. In this article, we analyzed the metabolic level of patients to explain how Mp aggravates asthma in children. Methods: We divided the subjects into the asthma, Mp infection, asthma combined with Mp infection and healthy groups. Patients’ peripheral blood was collected for metabolic and interaction analysis. Cytokine levels were measured via serum and exhaled breath condensate (EBC). Results: A total of 150 participating subjects were divided into four groups after exclusion. We found out that there were different metabolic pathways between the healthy and disease groups. The major pathways of both asthma and asthma combined with Mp infection were valine, leucine and isoleucine biosynthesis; malate-aspartate shuttle was the main differential pathway for Mp infection. Moreover, even though three disease groups involved 81 metabolites at the same time, compared with asthma combined with Mp infection, 2 single disease groups still involved different amino acid pathways (phenylalanine, tyrosine and tryptophan biosynthesis; valine, leucine and isoleucine biosynthesis). Interaction analysis showed that Mp infection in asthmatic patients not only activated cytokines, but also activated Toll-like receptors (TLRs) 2 and 6. Finally, the levels of interleukin (IL)-4, IL-8, IL-13 and tumor necrosis factor-α in EBC with asthma combined with Mp infection were significantly higher than the 2 single disease groups. Conclusions: Mp infection in asthmatic children can cause changes in the levels of various amino acids in the body, which were enriched in the pathways such as valine, leucine and isoleucine biosynthesis. Palmitic acid can activate TLR2, and iloprost reduces IL-10 levels, ultimately leading to the increased airway inflammation.

Study on the optimization of the decolorization of orange essential oil

Jing-Nan Ren,Yan Zhang,Gang Fan,Mei-Ping Wang,Lu-Lu Zhang,Zi-Yu Yang,Siyi Pan 한국식품과학회 2018 Food Science and Biotechnology Vol.27 No.4

The effects of diatomite, activated clay and acticarbon on the decolorization of orange essential oil were investigated. Single factor and orthogonal tests were performed to determine the optimum discoloring conditions. The results showed that the activated clay exhibited the most satisfactory effect on discoloring. Then it was used as the decolorizer for the decolorization of orange essential oil. The highest decolorization rate (84.5%) was obtained using 10% activated clay at 60 C for 30 min. The contents of oxygenated compounds (linalool and citral) increased from 1.4 to 3.1% after decolorization. Sensory assessment revealed that the orange essential oil after decolorization using activated clay had a mellow and characteristic orange aroma. Chromaticity analysis showed that it had excellent transparency and yellow color under the optimized condition. Thus, decolorization with activated clay could maintain the quality and prolong the storage of orange essential oil.

Extended State Observer Based Adaptive Backstepping Nonsingular Fast Terminal Sliding-mode Control for Robotic Manipulators with Uncertainties

Zhenghong Xu,Xiaohui Yang,Wenjie Zhang,Wei Zhang,Shuang Yang,Siyi Zhou,Peter Xiaoping Liu 제어·로봇·시스템학회 2022 International Journal of Control, Automation, and Vol.20 No.9

This paper proposes a novel robust finite-time tracking control scheme for robotic manipulators with uncertainties and external disturbances. In order to reduce the chattering phenomenon and enhance the robustness of the system, we design a novel extended state observer with filter function for estimating the lumped term of system uncertainties and external disturbances. We adopt the backstepping mechanism to design an adaptive backstepping nonsingular fast terminal sliding mode controller, achieve finite time convergence of the tracking errors while avoiding the singularity problem. An adaptive update law is designed for the switching gain, which further weakens the chattering problem. The finite-time convergence of tracking errors and the stability of the closed-loop system are ensured by the Lyapunov criterion. In comparison with other control methods, numerical simulation on a two-link rigid robot manipulator demonstrates the effectiveness and superiority of the proposed method.

Yeast Extract: Characteristics, Production, Applications and Future Perspectives

Tao Zekun,Yuan Haibo,Liu Meng,Liu Qian,Zhang Siyi,Liu Hongling,Jiang Yi,Huang Di,Wang Tengfei 한국미생물·생명공학회 2023 Journal of microbiology and biotechnology Vol.33 No.2

Yeast extract is a product prepared mainly from waste brewer’s yeast, which is rich in nucleotides, proteins, amino acids, sugars and a variety of trace elements, and has the advantages of low production cost and abundant supply of raw material. Consequently, yeast extracts are widely used in various fields as animal feed additives, food flavoring agents and additives, cosmetic supplements, and microbial fermentation media; however, their full potential has not yet been realized. To improve understanding of current research knowledge, this review summarizes the ingredients, production technology, and applications of yeast extracts, and discusses the relationship between their properties and applications. Developmental trends and future prospects of yeast extract are also previewed, with the aim of providing a theoretical basis for the development and expansion of future applications.