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Manipulating guest-responsive spin transition to achieve switchable fluorescence in a Hofmann-type framework

Science China Chemistry 2024年第10期67卷 3339-3346页

作者： Xue-Ru Wu Shu-Qi Wu Zhi-Kun Liu ming-xing chen Jun Tao Osamu Sato Hui-Zhong Kou Engineering Research Center of Advanced Rare Earth Materials (Ministry of Education) Department of ChemistryTsinghua University Institute for Materials Chemistry and Engineering & IRCCS Kyushu University Key Laboratory of Cluster Science of Ministry of Education School of Chemistry and Chemical EngineeringLiangxiang CampusBeijing Institute of Technology Analytical Instrumentation Center College of Chemistry and Molecular EngineeringPeking University

The change of fluorescence emission manipulated by spin state transition attracts considerable attention owing to its potential applications in magneto-optical switching ***,we report two two-dimensional（2D） Hofmann-type spin crossover（SCO） metal-organic frameworks（MOFs）[FeⅡ（PNI）2{AgⅠ（CN）2}2]·CHCl3（3Ag·CHCl3） and[FeⅡ（PNI）2{AuⅠ（CN）2}2]·CHCl3（3Au·CHCl3） based on the fluorescent ligand N-（4-pyridylmethyl）-1,8-naphthalimide（PNI）.Both complexes exhibit interesting SCO behaviors switched by guest solvent molecules,namely three-step transitions for the solvated complexes and complete onestep hysteretic SCO for the desolvated ones,verified by temperature-dependent magnetic susceptibility measurements,Mossbauer spectra,structural analyses,and differential scanning calorimetry ***,temperature-dependent fluorescence spectra exhibit double peaks（monomer and excimer emission） with both emission peaks change consistent with the change in SCO properties during the solvent molecule *** this study,we integrated guest-responsive SCO behavior into MOFs to manipulate the multistability of spin state and fluorescence switching,providing a rational strategy for the development of stimuli-responsive multifunctional materials.

关键词： spin crossover fluorescence multifunctional materials metal-organic frameworks Hofmann-type

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Lithium carbonate-induced giant goiter and subclinical hyperthyroidism in a patient with schizophrenia:A case report and review of literature

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World Journal of Clinical Cases 2024年第20期12卷 4357-4364页

作者： xing-ming chen Zhi-Li Jiang Xiang Wu Xu-Guang Li Department of Psychiatry The Affiliated Brain Hospital of Guangzhou Medical UniversityGuangzhou 510370Guangdong ProvinceChina Department of General Surgery The Affiliated Brain Hospital of Guangzhou Medical UniversityGuangzhou 510370Guangdong ProvinceChina Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province The Ministry of Education of ChinaGuangzhou Medical UniversityGuangzhou 511436Guangdong ProvinceChina

BACKGROUND Lithium carbonate is used to manage various mood disorders,but it can cause thyroid abnormalities,including goiter,hypothyroidism,and *** rare cases,it can lead to giant goiter and subclinical hyperthyroidism,which may require surgical intervention in severe *** SUMMARY This case represents a rare development of giant goiter and subclinical hyperthyroidism in a schizophrenia patient who was subjected to prolonged lithium carbonate *** enlarged thyroid gland caused pressure on the airway and recurrent laryngeal nerve,which led to respiratory distress,hoarseness,and *** immediate danger of suffocation required urgent surgical *** this report,we describe the case of a 41-year-old Chinese *** sheds light on the etiology and challenges associated with managing a giant *** patient underwent a subtotal thyroidectomy to relieve airway compression and facilitate airway *** to the procedure,the patient was given iodine to ***,changes were made to the psychiatric medication *** surgery,the patient's respiratory function and vocal cord functionality improved significantly,and her mental state remained *** It is essential to monitor thyroid function,test thyroid antibody levels,and perform thyroid ultrasounds consistently in all patients undergoing long-term lithium carbonate *** vigilance helps prevent severe and potentially life-threatening thyroid enlargement.

关键词： Lithium carbonate Giant goiter Subclinical hyperthyroidism Schizophrenia Subtotal thyroidectomy Case report

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High-temperature chlorination of gold with transformation of iron phase

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Rare Metals 2016年第11期35卷 881-886页

作者： Zheng-Yao Li Wei-Wei Wang Kun Yue ming-xing chen School of Civil and Environmental Engineering University of Science and Technology Beijing

Gold in cyanide tailings from Shandong Province is mainly encapsulated by hematite and magnetite at distribution rates of 76.49 % and 10.88 %, ***-reduction one-step roasting of cyanide tailings was conducted under the following conditions： calcium chloride dosage of 6 %, bituminous coal dosage of 30 %, calcium oxide dosage of 10 %（all dosages are *** mass of cyanide tailings） at 1000 ℃ of roasting temperature. X-ray diffraction（XRD）, scanning electron microscopy（SEM）, and chemical-phase analysis were performed to investigate the effects of iron phase transformation on the high-temperature chlorination of *** indicate that the lattice structure of hematite undergoes expansion, pulverization, and reorganization when hematite is reduced to magnetite, which leads to42.03 % gold exposure, and the high-temperature chlorination rate of gold is 41.17 % at the same time. The structure of wustite formed by the reduction in magnetite is porous and loose, and thus 44.02 % of gold is exposed. The high-temperature chlorination rate of gold is increased by41.98 percentage points. When wustite is reduced to metallic iron, 4.42 % of gold is exposed, and the hightemperature chlorination rate of gold is increased by3.38 percentage points. Accordingly, the high-temperature chlorination of gold mainly occurs in two stages, in which Fe_2O_3 is reduced to Fe_3O_4, and Fe_3O_4 is reduced to Fe_xO finally.

关键词： Cyanide tailings Chlorination-reduction one-step roasting Transformation of iron phase Gold

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Rare narrow QRS tachycardia with atrioventricular dissociation: A case report

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World Journal of Clinical Cases 2020年第21期8卷 5420-5425页

作者： Chao Zhu ming-xing chen Gui-Jian Zhou Department of Cardiology The Affiliated Hospital of Yangzhou UniversityYangzhou UniversityYangzhou 225009Jiangsu ProvinceChina

BACKGROUND Most Mahaim fibers are right free-wall atriofascicular accessory pathways with only antegrade *** Mahaim fiber is not very rare;however,concealed nodoventricular fiber is a very rare kind of retrograde accessory pathway in supraventricular tachycardia with atrioventricular(AV)*** a few cases about successful ablation of the nodoventricular accessory pathway have been *** describe the case of a 32-year-old woman who underwent an electrophysiology study and radiofrequency(RF)ablation of a rare narrow QRS tachycardia with AV *** SUMMARY A 32-year-old woman with a history of paroxysmal palpitation was admitted to our hospital for RF *** revealed a narrow QRS complex tachycardia with the same morphology in sinus *** showed no structural heart disease.A right-sided concealed AV accessory pathway and a right-sided concealed nodoventricular accessory pathway were involved in the orthodromic atrioventricular reciprocating *** bundle-ventricular interval during tachycardia was the same as that in sinus *** tachycardia could be initiated and entrained by ventricular *** right ventricular stimulus introduced during the His-bundle refractory period when tachycardia occurred was able to advance the next atrial *** earliest atrial activation was mapped near the proximal slow AV nodal *** ablation of both accessary pathways was successfully performed under the guidance of a three-dimensional mapping system by recording the earliest retrograde atrial potential,and tachycardia could no longer be *** Narrow QRS tachycardia with AV dissociation is inducible by concealed nodoventricular fiber and ablated by recording the earliest retrograde atrial potential.

关键词： Atrioventricular dissociation Nodoventricular pathways Ablation Narrow QRS wave tachycardia Mahaim fiber Case report

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Nuclear mass based on the multi-task learning neural network method

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Nuclear Science and Techniques 2022年第4期33卷 96-103页

作者： xing-chen ming Hong-Fei Zhang Rui-Rui Xu Xiao-Dong Sun Yuan Tian Zhi-Gang Ge School of Nuclear Science and Technology Lanzhou UniversityLanzhou 730000China China Nuclear Data Center China Institute of Atomic EnergyBeijing 102413China

The global nuclear mass based on the macroscopic-microscopic model was studied by applying a newly designed multi-task learning artificial neural network(MTL-ANN). First, the reported nuclear binding energies of 2095 nuclei(Z ≥ 8, N ≥ 8) released in the latest Atomic Mass Evaluation AME2020 and the deviations between the fitting result of the liquid drop model(LDM)and data from AME2020 for each nucleus were *** compensate for the deviations and investigate the possible ignored physics in the LDM, the MTL-ANN method was introduced in the model. Compared to the single-task learning(STL) method, this new network has a powerful ability to simultaneously learn multi-nuclear properties,such as the binding energies and single neutron and proton separation energies. Moreover, it is highly effective in reducing the risk of overfitting and achieving better predictions. Consequently, good predictions can be obtained using this nuclear mass model for both the training and validation datasets and for the testing dataset. In detail, the global root mean square(RMS) of the binding energy is effectively reduced from approximately 2.4 MeV of LDM to the current 0.2 MeV, and the RMS of Sn, Spcan also reach approximately 0.2 MeV. Moreover, compared to STL, for the training and validation sets, 3-9% improvement can be achieved with the binding energy, and 20-30% improvement for S_(n), S_(p);for the testing sets, the reduction in deviations can even reach 30-40%, which significantly illustrates the advantage of the current MTL.

关键词： Macroscopic–microscopic model Binding energy Neural network Multi-task learning

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Minimally invasive transforaminal lumbar interbody fusion aided with computer-assisted spinal navigation system combined with electromyography monitoring

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Chinese Medical Journal 2012年第22期125卷 3947-3951页

作者： LUO Wei ZHANG Fan LIU Tie DU xing-li chen An-ming LI Feng Huazhong Univ Sci & Technol Tongji Med Coll Tongji Hosp Dept Orthopaed Wuhan 430030 Hubei Peoples R China San Xia Univ Dept Orthopaed People Hosp Yichang 1 Yichang 443000 Hubei Peoples R China Capital Med Univ Beijing Chaoyang Hosp Dept Orthopaed Beijing 100020 Peoples R China

Background Minimally invasive techniques are gaining wide-spread application in lumbar fusion surgery, because they may have advantage over conventional open surgery in approach-related morbidity. This research was aimed to evaluate the safety and accuracy of the techniques of minimally invasive transforaminal lumbar interbody fusion by using a computer-assisted spinal navigation system combined with electromyography monitoring. Methods Sixteen patients underwent minimally invasive transforaminal lumbar interbody fusion. A computer-assisted spinal navigation system and electromyography were used for guiding pedicle screw placement. The operative duration, blood loss, complications, and fluoroscopic time were recorded. Clinical outcome was assessed by Visual Analog Scale and Oswestry Disability Index. Radiographic images were obtained to evaluate the accuracy of pedicle screw placement and fusion rates. Results The Visual Analog Scale and Oswestry Disability Index scores were vastly improved postoperatively. A total of 64 pedicle screws were implanted and three were regarded as misplacement by post-operative CT scan. Three screw trajectories were adjusted according to intra-operative stimulus-evoked electromyography monitoring. The average fluoroscopy time in each patient was 31.8 seconds, which equals to 7.9 seconds per pedicle screw. No patients had instrument related neurological complications, infection, implant failure or revision. Successful fusion was found in all patients. Conclusions The combination of navigation system and real-time electromyography monitoring can make the minimally invasive operation more safe and accurate while decreasing radiation exposure time of the medical staff and patient and minimizing the chance and the degree of the pedicle screw misplacement.

关键词： minimally invasive spine surgery computer-assisted navigation, transforaminal lumbar interbodyfusion, electromyographic monitoring

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Physical and Electrochemical Characterization of Hydrothermal Prepared α'-NaV_2O_5 Crystals

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Chemical Research in Chinese Universities 2010年第2期26卷 291-293页

作者： HU Fang WEI Ying-jin JIANG Tao ming xing chen Gang WANG Chun-zhong College of Physics State Key Laboratory of Superhard Materials Jilin University Changchun 130012 P. R. China

a＇-NaV2O5 was prepared by a simple hydrothermal process. X-ray diffraction confirmed the orthorhombic structure of a＇-NaV2O5, with preferential growth along the （001） direction. Scanning electron microscopy showed a＇-NaV205 was composed of flake-shaped crystals. X-ray photoelectron spectroscopy confirmed the co-existence of V^4＋ and V^5＋ in a＇-NaV2O5, which results in an average V^4.5＋ oxidation state of a＇-NaV2O5. The observed Raman bands are ascribed to different V-O vibrations, a＇-NaV205 shows a reversible specific capacity of about 100 mA·h·g^-1 between 3.5 and 1.0 V, with a good capacity retention. The good electrochemical stability of the material is attributed to its structural stability during Li^＋ intercalation.

关键词： Lithium ion battery Vanadium bronze Electrochemical performance

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Fluorescence emission modulation in cyanido-bridged Fe(Ⅱ)spin crossover coordination polymers

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Science China Chemistry 2022年第8期65卷 1569-1576页

作者： Xue-Ru Wu Zhi-Kun Liu Min Zeng ming-xing chen Jun Tao Shu-Qi Wu Hui-Zhong Kou Department of Chemistry Tsinghua UniversityBeijing 100084China Key Laboratory of Cluster Science of Ministry of Education School of Chemistry and Chemical EngineeringLiangxiang CampusBeijing Institute of TechnologyBeijing 102488China Analytical Instrumentation Center College of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Institute for Materials Chemistry and Engineering&IRCCS Kyushu University744 MotookaNishi-kuFukuoka 819-0395Japan

Synergistic fluorescent spin crossover(SCO)bifunctional molecular materials have novel applications in the molecule-based magneto-optical ***,we report two novel three-dimensional(3D)Hofmann-type fluorescent SCO complexes[Fe^(II)-(tppe)MI(CN)_(2)]ClO_(4)·nSolv(tppe=tetra-(4-pyridylphenyl)ethene,M=Ag(tppe-Ag),Au(tppe-Au)).Both complexes show one-step abrupt SCO with the transition temperature of 230 K for tppe-Ag,and 245 K for tppe-Au accompanied by a color change from red to light *** SCO process is confirmed by the variable-temperature single-crystal X-ray diffraction analysis on *** the first time,the abnormal increase in emission intensity and concomitant large bathochromic shifts in the fluorescence spectra during the SCO process are realized in the 3D Hofmann-type coordination polymers expanded by the tetradentate tppe ***,tppe-Ag exhibits the unprecedented fluorescence emission from green to the edge of yellow.

关键词： fluorescence spin crossover multifunctional materials coordination polymers synergetic effect

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Using ketamine in a patient with a near-occlusion tracheal tumor undergoing tracheal resection and reconstruction: A case report

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World Journal of Clinical Cases 2022年第23期10卷 8417-8421页

作者： Xiao-Han Xu Hui Gao xing-ming chen Hao-Bo Ma Yu-Guang Huang Department of Anesthesiology Peking Union Medical College HospitalBeijing 100730China Department of Otolaryngology-Head and Neck Surgery Peking Union Medical College HospitalBeijing 100730China Department of Anesthesia Critical Care and Pain MedicineBeth Israel Deaconess Medical CenterBostonMA 02215United States

BACKGROUND Tracheal tumors may cause airway obstruction and pose a significant risk to ventilation and *** to its rarity,there is currently no established protocol or guideline for anesthetic management of resection of upper tracheal tumors,therefore individualized strategies are *** are limited number of reports regarding the anesthesthetic management of upper tracheal resection and reconstruction(TRR)in the *** successfully used intravenous ketamine to manage a patient with a near-occlusion upper tracheal tumor undergoing *** SUMMARY A 25-year-old female reported progressive dyspnea and *** showed an intratracheal tumor located one tracheal ring below the glottis,which occluded>90%of the tracheal *** patient was scheduled for *** the risk of complete airway collapse after the induction of general anesthesia,we decided to secure the airway with a tracheostomy with spontaneous *** surgeons needed to transect the trachea 1-2 cartilage rings below and above the tumor borders:a time-consuming *** and movement needed be minimized;thus,we added intravenous ketamine to local anesthetic *** tracheostomy,an endotracheal tube was placed into the distal trachea,and general anesthesia was *** surgeons resected four cartilage rings with the tumor attached and anastomosed the posterior tracheal *** performed a video-laryngoscopy to place a new endotracheal ***,the surgeons anastomosed the anterior tracheal *** patient was extubated *** Ketamine showed great advantages in the anesthesia of upper TRR by providing analgesia with minimal respiratory depression or airway collapse.

关键词： Ketamine Near-occlusion Upper tracheal tumor Tracheal resection and reconstruction Tracheostomy Case report

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A novel classification of tracheal defects and the reconstruction strategies:A retrospective study based on 106 cases

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World Journal of Otorhinolaryngology-Head and Neck Surgery 2023年第1期9卷 66-73页

作者： Xin Xia Zhu Xiao-Li Ying-Ying Zhu Wen-Wen Diao xing-ming chen Department of Otolaryngology-Head and Neck Surgery Peking Union Medical College HospitalPeking Union Medical College and Chinese Academy of Medical SciencesBeijing100730China

Objective:The study aims to present a novel classification of tracheal defects and the corresponding reconstruction ***:The retrospective study was designed to analyze patients with diagnosed primary or secondary tracheal tumors from 1991 to *** techniques,complications and prognosis were *** status and patient outcomes were the principal follow-up *** defects were classified into two plane sizes(vertical(V)and horizontal(H)planes).Vertical defects were further categorized into three groups based on their tracheal ring numbers(V 1,≤5 rings;V 2,6-10 rings;and V 3,>10 rings).Tracheal defects with horizontal plane size H 1 and H 2 represent defects less and more than one-half the circumference of ***,suitable reconstruction strategies were planned primarily based on"V"and"H"*** reconstruction strategies performed were sleeve resection followed by an end-to-end anastomosis,window resection with sternocleidomastoid myoperiosteal flap reconstruction,defects conversion with rotation anastomosis,and modified tracheostomy with secondary flap ***:A total of 106 patients diagnosed with tracheal defects were enrolled in the study,of whom 59 patients underwent sleeve resection followed by end-to-end anastomosis;40 patients received window resection alongside sternocleidomastoid(SCM)myoperiosteal flap reconstruction;five patients received converting defects with rotation anastomosis and two patients underwent modified tracheostomy with secondary stage flap *** stenosis occurred in three V 2H 1 defect cases and were treated by a second reconstruction *** unilateral recurrent laryngeal nerve paralysis occurred in two patients with the V 3H 2 defect type,who were treated by temporary tracheotomy and partial vocal cord resection and extubated successfully during *** 106 patients achieved airway patency with adequate laryngeal function at the end of

关键词： Classification Tracheal defect Tracheal reconstruction

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