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Interaction between adolescent sleep rhythms and gender in an obese population

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World Journal of Clinical Cases 2024年第1期12卷 86-94页

作者： Nan-Nan Wu Guo-Li Yan hong-yu zhang Ling Sun Min Hou Guang-Ming Xu Department of Laboratory Medicine Tianjin Chest HospitalTianjin 300222China Mental Health Center of Tianjin Medical University Tianjin Anding HospitalTianjin 300222China Department of Child and Adolescent Psychology Mental Health Center of Tianjin Medical UniversityTianjin 300222China

BACKGROUND The obesity rate of adolescents is gradually increasing,which seriously affects their mental health,and sleep plays an important role in adolescent *** To investigate the relationship between sleep rhythm and obesity among adolescents and further explores the interactive effect of sleep rhythm and gender on adolescent obesity,providing a theoretical basis for developing interventions for adolescent *** Research data source Tianjin Mental Health Promotion Program for *** April to June 2022,this study selected 14201 students from 13 middle schools in a certain district of Tianjin as the research subject using the convenient cluster sampling *** these students,13374 accepted and completed the survey,with an effective rate of 94.2%.The demographic data and basic information of adolescents,such as height and weight,were collected through a general situation *** sleep rhythm of adolescents was evaluated using the reduced version of the morningness-eveningness *** A total of 13374 participants(6629 females,accounting for 49.56%;the average age is 15.21±1.433 years)were *** them,the survey showed that 2942 adolescent were obesity,accounting for 22%and 2104 adolescent were overweight,accounting for 15.7%.Among them,1692 male adolescents are obese,with an obesity rate of 25.1%,higher than 18.9%of female *** is a statistically significant difference between the three groups(χ2=231.522,P<0.000).The obesity group has the smallest age(14.94±1.442 years),and there is a statistical difference in age among the three groups(F=69.996,P<0.000).Obesity rates are higher among individuals who are not-only-child,have residential experience within six months,have family economic poverty,and have evening-type sleep(P<0.05).Logistic regression analysis shows a correlation between sleep rhythm and adolescent ***-type sleep rhythm can increase the risk of obesity in male adoles

关键词： Adolescent Obesity Sleep rhythm Gender Interaction

Avoiding misdiagnosis of multilocular thymic cysts as malignant tumors on computer tomography

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World Journal of Clinical Cases 2024年第19期12卷 3671-3675页

作者： yu-hong zhang Yan-Miao Liu Kai-Li Shen Jing-Jing Wu Fu-Shan Tang Key Laboratory of Clinical Pharmacy in Zunyi City Zunyi Medical UniversityZunyi 563006Guizhou ProvinceChina Department of Traditional Chinese Medicine Central Hospital in Jinchang CityJinchang 737102Gansu ProvinceChina The First Clinical Institute Zunyi Medical UniversityZunyi 563006Guizhou ProvinceChina Department of Clinical Pharmacy Key Laboratory of Basic Pharmacology of Guizhou Province and School of PharmacyZunyi Medical UniversityZunyi 563006Guizhou ProvinceChina

This editorial provides insights from a case report by Sun et al published in the World Journal of Clinical *** case report focuses on a case where a multilocular thymic cyst(MTC)was misdiagnosed as a thymic tumor,resulting in an unnecessary surgical *** MTCs and thymic tumors are rare conditions that heavily rely on radiological imaging for accurate ***,the similarity in their imaging presentations can lead to misinterpretation,resulting in unnecessary surgical *** to the ongoing lack of comprehensive knowledge about MTCs and thymic tumors,we offer a summary of diagnostic techniques documented in recent literature and examine potential causes of *** computer tomography(CT)values surpass 20 Hounsfield units and display comparable morphology,there is a risk of misdiagnosing MTCs as thymic *** various differential diagnostic methods like biopsy,molecular biology,multi-slice CT,CT functional imaging,positron emission tomography/CT molecular functional imaging,magnetic resonance imaging and radiomics,proves advantageous in reducing clinical misdiagnosis.A deeper understanding of these conditions requires increased attention and exploration by healthcare ***,the continued advancement and utilization of various diagnostic methods are expected to enhance precise diagnoses,provide appropriate treatment options,and improve the quality of life for patients with thymic tumors and MTCs in the *** advancement and utilization of various diagnostic methods are expected to enhance precise diagnoses,provide appropriate treatment options,and improve the quality of life for patients with thymic tumors and MTCs in the future.

关键词： Thymic tumor Multilocular thymic cyst Misdiagnosis Differential diagnosis Imaging manifestation Computed tomography

Thermodynamics of the Dissociation of Carbonic Acid in Mixed Solvent.4. The System of NaHCO_3-Na_2CO_3-NaCl-Ethanol-Water

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Chinese Chemical Letters 1998年第12期9卷 0-0,0-0页

作者： hong yu zhang Department of Chemistry Liaoning University Shenyang 110036 China

The sendempirical method AM1 was used to calculate AHOF values ofperylenequinone (PQ), and HOF was used as a theoretical parameter to predict the scavengingability of Po hydroxyls. Owing to strong intramolecular hydrogen bonds and the electronattracting property of the keto-function, hydroxyls of PQ were so weak in scavenging free radicalsthat the its effect was negligible in photodynandc therapy. However, when Po was substitilted withstrong electron-donating groups, its scavenging activity was enhanced markedly.

关键词： Perylenequinonoid derivatives antioxidant AM1 method △HOF value

High-Temperature Structural Stabilities of Ni-Based SingleCrystal Superalloys Ni–Co–Cr–Mo–W–Al–Ti–Ta with Varying Co Contents

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Acta Metallurgica Sinica(English Letters) 2018年第2期31卷 127-133页

作者： yu zhang Qing Wang hong-Gang Dong Chuang Dong hong-yu zhang Xiao-Feng Sun Key Laboratory of Materials Modification by Laser Ion and Electron Beams (Dalian University of Technology) Ministry of Education Superalloys Division Institute of Metal Research Chinese Academy of Sciences

It has been recently pointed out that the compositions of industrial alloys are originated from cluster-plus-glueatom structure units in solid solutions. Specifically for Ni-based superalloys, after properly grouping the alloying elements into Al, Ni-like（Ni^-）, γ＇-forming Cr-like（Cr^-γ＇） and γ-forming Cr-like（Cr^-γ＇）, the optimal formula for single-crystal superalloys is established [Al–Ni^-12]（AlCr^-γ0：5Cr^-γ1：5）. The Co substitutions for Ni at the shell sites are conducted on the basis of the first-generation single-crystal superalloy AM3, formulated as [Al-Ni2-xCox]（Al1Ti0.25Ta0.25Cr1W0.25Mo0.25）, with x = 1.5, 1.75, 2 and 2.5（the corresponding weight percents of Co are 9.43, 11.0, 12.57 and 15.71, respectively）. The900 ℃ long-term aging follows the Lifshitz–Slyozov–Wagner theory（LSW theory）, and the Co content does not have noticeable influence on the coarsening rate of c0. The microstructure and creep behavior of the four（001） single-crystal alloys are investigated. The creep rupture lifetime is reduced as Co increases. The alloy with the lowest Co（9.43 Co） shows the longest lifetime of about 350 h at 1050 ℃/120 MPa, and all the samples show N-type rafting after creep tests.

关键词： Nickel-based single-crystal superalloys Cluster-plus-glue-atom model Composition formula Co

Complete catalytic oxidation of o-xylene over CeO_2 nanocubes

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Journal of Environmental Sciences 2011年第1期23卷 160-165页

作者： Lian He yunbo yu Changbin zhang hong He State Key. Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

The activities of CeO2 nanocubes calcined at different temperatures were tested for catalytic oxidation of o-xylene. Using CeO2 nanocubes as catalysts, complete catalytic oxidation of o-xylene was achieved below 210℃. The CeO2 nanomaterials were characterized by means of BET, X-ray diffraction （XRD）, transmission electron microscopy （TEM）, and high-resolution transmission electron microscopy （HRTEM）. From the TEM images, all CeO2 nanocubes displayed cubic morphology irrespective of calcination temperature. The HRTEM images revealed that these nanocubes were enclosed by reactive {001} planes, which may contribute to the intrinsically catalytic property of o-xylene oxidation. The higher activity of CeO2 nanocubes calcined at 550℃ than those calcined at above 550℃ was attributed to their smaller crystallite size and larger surface area. The influences of reaction conditions were also studied, which found that a higher reaction temperature was necessary for complete catalytic oxidation of o-xylene at higher weight hourly space velocity （WHSV） and o-xylene concentration.

关键词： CeO2 nanocubes o-xylene catalytic oxidation calcination temperature

Is HOMO Energy Level a Good Parameter to Characterize Antioxidant Activity

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Chinese Chemical Letters 2000年第8期11卷 727-730页

作者： hong yu zhang De Zhan CHEN Department of Biological and Chemical Engineering Zibo UniversityZibo 255091 Department of Chemistry Shandong Teachers'UniversityJinan 250014

Semiempirical quantum chemical method AM1 was employed to calculate the highest occupied molecular orbital (HOMO) energy levels (E-HOMO) for various types of antioxidants. It was verified that the correlation between logarithm of free radical scavenging rate constants (1gks) and E-HOMO substantially arises from the correlation between E-HOMO and O-H bond dissociation energies (BDE) of antioxidants. Furthermore, E-HOMO were poorly correlated with the logarithm of relative free radical scavenging rate constants (1gk(3)/k(1)) for various types of antioxidants that possess complex structures (r = 0.5602). So in a broad sense, E-HOMO was not an appropriate parameter to characterize the free radical scavenging activity of antioxidants.

关键词： AM1 antioxidant free radical HOMO energy level O-H bond dissociation energy structure-activity relationship

Organic materials with hydrostatic pressure induced mechanochromic properties

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Chinese Chemical Letters 2016年第8期27卷 1367-1375,1470页

作者： Lu Wang Kai-Qi Ye hong-yu zhang State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin University

Mechanochromic organic materials are a typical class of stimuli materials that has response to external physical stimuli such as shearing,grinding,and compressing *** compounds with mechanochromic characters in solid forms have attracted significant attention in the past decades due to their potential applications in sensors and memory *** anvil cell is an emerging technology that can provide isotropic pressure in a tiny *** a new stimuli method can be applied in investigating optical variation of mechanochromic *** this review,we focus on mechanoluminescence systems that are responsive to isotropic compression under high pressure and summarize the recent advances on organic materials studied by the diamond anvil cell.

关键词： Organic solids Mechanochromic Diamond anvil cell Stimuli response Hydrostatic pressure

The saproxylic beetle assemblage associated with different host trees in Southwest China

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Insect Science 2008年第3期15卷 251-261页

作者： Jie Wu Xiao-Dong yu hong-zhang Zhou Institute of Zoology Chinese Academy of Sciences Beijing China

Dead wood is a habitat for many insects and other small animals, some of which may be rare or endangered and in need of effective protection. In this paper, saproxylic beetle assemblages associated with different host trees in the subtropical forests in southwestern China were investigated. A total of 277 species （1 439 specimens） in 36 beetle families were collected from 117 dead wood samples, of which 101 samples were identified and respectively belonged to 12 tree genera. The number of saproxylic beetle species varied greatly among logs of different tree genera, with the highest diversity on logs of Juglans. Generally, broad-leaved trees had a higher richness and abundance of saproxylic species than coniferous trees. Cluster analysis revealed that assemblages from broad-leaved tree genera were generally similar （except for Betula） and assemblages from coniferous trees formed another distinct cluster. The subsequent indicator analysis proposed that there are different characteristic species for different cluster groups of host tree genera. In our study, log diameter has no positive influence on beetle species density. Conversely, comparisons of individual-based rarefaction curves suggested that beetle species richness was highest in the small diameter class both in coniferous and broad-leaved tree genera. With increased wood decay, proportion of habitat specialists （saproxylic beetles living on one tree genus） decreased, whereas proportion of habitat generalists （living on more than three tree genera） increased. The beetle species density was found to be higher in early stages, and decreased in later stages as well. A negative influence of altitude on saproxylic beetle species richness and abundance was detected. It was indicated that different tree genera and altitudes possibly display cross effects in modulating the altitudinal distribution and host preference of the beetles.

关键词： China host trees Saproxylic beetle subtropical forest

A Modified Projection Method for Linear Feasibility Problems

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International Journal of Automation and computing 2009年第4期6卷 401-405页

作者： Yi-Ju Wang hong-yu zhang School of Operations Research and Management Science Qufu Normal University Rizhao 276800 PRC

In this paper, we present a modified projection method for the linear feasibility problems （LFP）. Compared with the existing methods, the new method adopts a surrogate technique to obtain new iteration instead of the line search procedure with fixed stepsize. For the new method, we first show its global convergence under the condition that the solution set is nonempty, and then establish its linear convergence rate. Preliminary numerical experiments show that this method has good performance.

关键词： Linear feasibility problem (LFP) projection method global convergence convergence rate computational experiments