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Oligomeric donor with appropriate crystallinity for organic solar cells

Chinese Chemical Letters 2024年第2期35卷 289-294页

作者： Kaiming Yang min Lv Yanhong chang Kun Lu Zhixiang Wei CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Department of Environmental Science and Engineering University of Science and Technology BeijingBeijing 100083China Beijing Key Laboratory of Resource Treatment of Typical Industrial Pollutants Beijing 100083China

Improving the performance of all-small-molecule organic solar cells(ASM-OSCs)largely depends on the design and application of novel donors with appropriate *** molecular conjugation is an effective method for regulating molecular stacking and *** this work,we successfully designed and synthesized two novel acceptor-donor-donor-donor-acceptor(A-D-D-D-A)type oligomeric donors with three dithieno[2,3-d:2′,3′-d′]benzo[1,2-b:4,5-b']dithiophene(DTBDT)as the central unit,named as 3DTBDT-Cl and 3DTBDT,depending on with and without chlorine substitution on the thiophene side *** found that the introduction of chlorine atoms makes the blend films display stronger crystallinity but with large-scale phase separation morphology and more defects,which eventually leads to a power conversion efficiency(PCE)of only 10.83%,whereas the blend films based 3DTBDT with appropriate crystallinity achieved 13.74%*** with 3DTBDT-Cl/L8-BO,the 3DTBDT/L8-BO films exhibited a nanoscale bi-continuous interpenetrating network morphology with a smaller domain size and more suitable crystallinity,which guarantees the corresponding devices obtained more efficient exciton dissociation,efficient charge transport,reduced bimolecular recombination,and performed more balanced carrier *** results demonstrated that regulating the crystallinity of oligomeric donors to obtain the desired phase separation morphology in the blend films could facilitate further improving the performance of ASM-OSCs.

关键词： Linked donor unit Oligomeric donors Crystallinity regulation Organic solar cells

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Successful removal of two magnets in the small intestine by laparoscopy and colonoscopy: A case report

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World Journal of Clinical Cases 2021年第27期9卷 8226-8231页

作者： Ryang Geun Oh Cheol Gu Lee You Na Park yoo min Lee Department of Pediatrics Soonchunhyang University Bucheon HospitalBucheon 14584South Korea Department of Surgery Soonchunhyang University Bucheon HospitalBucheon 14584South Korea

BACKGROUND Ingestion of multiple magnets can cause serious gastrointestinal complications,such as obstruction,fistulae,and *** multiple magnets traverse the stomach,coordination between pediatric gastroenterologists and pediatric surgeons is recommended,and ultimate management is required dependent on clinical *** SUMMARY A 5-year-old girl swallowed 2 small magnets that then remained in the right lower quadrant(RLQ)of the abdomen for 3 d;this required endoscopic and laparoscopic *** X-ray and computed tomography revealed highdensity objects in the RLQ *** after proper bowel preparations on the third day of ingestion revealed no foreign body in the colonic area or the end of the *** two magnets were removed via colonoscopy with laparoscopic *** It is important to establish effective coordination between pediatric gastroenterologists and pediatric surgeons when using a non-invasive procedure to remove magnets.

关键词： Child Colonoscopy Foreign bodies Laparoscopy Magnets Case report

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Gut microbial interactions based on network construction and bacterial pairwise cultivation

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Science China(Life Sciences) 2024年第8期67卷 1751-1762页

作者： min-Zhi Jiang chang Liu chang Xu He Jiang Yulin Wang Shuang-Jiang Liu State Key Laboratory of Microbial Technology Shandong UniversityQingdao 266000China State Key Laboratory of Microbial Resources and Environmental Microbiology Research Center(EMRC)Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China

Association networks are widely applied for the prediction of bacterial interactions in studies of human gut ***,the experimental validation of the predicted interactions is challenging due to the complexity of gut microbiomes and the limited number of cultivated *** this study,we addressed this challenge by integrating in vitro time series network(TSN)associations and cocultivation of TSN taxon *** samples were collected and used for cultivation and enrichment of gut microbiome on YCFA agar plates for 13 *** cells were harvested for DNA extraction and metagenomic sequencing.A total of 198 metagenome-assembled genomes(MAGs)were *** dynamics of bacteria growing on the YCFA agar were used to infer microbial association *** experimentally validate the interactions of taxon pairs in networks,we selected 24 and 19 bacterial strains from this study and from the previously established human gut microbial biobank,respectively,for pairwise *** co-culture experiments revealed that most of the interactions between taxa in networks were identified as neutralism(51.67%),followed by commensalism(21.67%),amensalism(18.33%),competition(5%)and exploitation(3.33%).Genome-centric analysis further revealed that the commensal gut bacteria(helpers and beneficiaries)might interact with each other via the exchanges of amino acids with high biosynthetic costs,short-chain fatty acids,and/or *** also validated 12 beneficiaries by adding 16 additives into the basic YCFA medium and found that the growth of 66.7%of these strains was significantly *** approach provides new insights into the gut microbiome complexity and microbial interactions in association *** work highlights that the positive relationships in gut microbial communities tend to be overestimated,and that amino acids,short-chain fatty acids,and vitamins are contributed to the positive relationships.

关键词： human gut microbiome gut microbial pairwise interaction co-culture association network microbial community

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Extraction of lithium from the simulated pyrometallurgical slag of spent lithium-ion batteries by binary eutectic molten carbonates

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International Journal of minerals,Metallurgy and Materials 2022年第9期29卷 1715-1721页

作者： Hui Dang Zhidong chang Hualei Zhou Sihang Ma min Li Jialing Xiang Department of Chemistry and Chemical Engineering School of Chemistry and Biological EngineeringUniversity of Science and Technology BeijingBeijing 100083China

The effective and low-temperature extraction of lithium from the pyrometallurgical slag of spent lithium-ion batteries(LIBs)remains a great ***,potassium carbonate/sodium carbonate(K_(2)CO_(3)/Na_(2)CO_(3)),which could form a eutectic molten salt system at 720℃,was used as a roasting agent to extract lithium from pyrometallurgical *** was successfully extracted from the slag by K_(2)CO_(3)/Na_(2)CO_(3) roasting followed by water *** calculation results indicate that the lengths of Li-O bonds increase after K^(+)/Na^(+)adsorption,resulting in the easy release of Li^(+)from the LiAlSi_(2)O_(6) lattice after roasting with K_(2)CO_(3)/Na_(2)CO_(3).Thermogravimetry-differential scanning calorimetry results indicate that the eutectic phenomenon of K_(2)CO_(3) and Na_(2)CO_(3) could be observed at 720℃ and that the reaction of the slag and eutectic molten salts occurs at temperatures above 720℃.X-ray diffraction results suggest that Li^(+)in the slag is exchanged by K^(+)in K_(2)CO_(3) with the concurrent formation of KAlSiO_(4),while Na_(2)CO_(3) mainly functions as a fluxing *** lithium extraction efficiency can reach 93.87%under the optimal conditions of a roasting temperature of 740℃,roasting time of 30 min,leaching temperature of 50℃,leaching time of 40 min,and water/roasted sample mass ratio of 10:*** work provides a new system for extracting lithium from the pyrometallurgical slag of spent LIBs.

关键词： spent lithium-ion battery lithium recovery silicate structure low roasting temperature binary eutectic carbonates roasting

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Data-driven surrogate model for aerodynamic design using separable shape tensor method

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Chinese Journal of Aeronautics 2024年第9期37卷 41-58页

作者： Bo PANG Yang ZHANG Junlin LI Xudong WANG min chang Junqiang BAI State Key Laboratory for Srrenglh and Vibration of Mechanical Structures Xi'an Jiaotong UniversityXi'an 710049China Unmanned System Research Institute Northwestern Polytechmical UniversityXi'an 710072China

In the context of increasing dimensionality of design variables and the complexity of constraints, the efficacy of Surrogate-Based Optimization(SBO) is limited. The traditional linear and nonlinear dimensionality reduction algorithms are mainly to decompose the mathematical matrix composed of design variables or objective functions in various forms, the smoothness of the design space cannot be guaranteed in the process, and additional constraint functions need to be added in the optimization, which increases the calculation cost. This study presents a new parameterization method to improve both problems of SBO. The new parameterization is addressed by decoupling affine transformations(dilation, rotation, shearing, and translation) within the Grassmannian submanifold, which enables a separate representation of the physical information of the airfoil in a highdimensional space. Building upon this, Principal Geodesic Analysis(PGA) is employed to achieve geometric control, compress the design space, reduce the number of design variables, reduce the dimensions of design variables and enhance predictive performance during the surrogate optimization process. For comparison, a dimensionality reduction space is defined using 95% of the energy,and RAE 2822 for transonic conditions are used as demonstrations. This method significantly enhances the optimization efficiency of the surrogate model while effectively enabling geometric constraints. In three-dimensional problems, it enables simultaneous design of planar shapes for various components of the aircraft and high-order perturbation deformations. Optimization was applied to the ONERA M6 wing, achieving a lift-drag ratio of 18.09, representing a 27.25% improvement compared to the baseline configuration. In comparison to conventional surrogate model optimization methods, which only achieved a 17.97% improvement, this approach demonstrates its superiority.

关键词： Aerodynamicdesign Grassmannian manifold Shape parameterization Surrogate-based optimiza-tion Data dimensionality reduction

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Endoscopic papillary large balloon dilation for the removal of bile duct stones

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World Journal of Gastroenterology 2013年第46期19卷 8580-8594页

作者： Jin Hong Kim min Jae Yang Jae Chul Hwang Byung Moo yoo Department of Gastroenterology Ajou University School of Medicine

Endoscopic papillary large balloon dilation(EPLBD)with endoscopic sphincterotomy(EST)has been widely used as the alternative to EST along with endoscopic mechanical lithotripsy(EML)for the removal of large or difficult bile duct ***,EPLBD without EST was recently introduced as its simplified alternative ***,we systematically searched PubMed,Medline,the Cochrane Library and EMBASE,and analyzed all gathered data of EPLBD with and without EST,respectively,by using a single standardized definition,reviewing relevant literatures,published between 2003and June 2013,where it was performed with largediameter balloons(12-20 mm).The outcomes,including the initial success rate,the rate of needs for EML,and the overall success rate,and adverse events were assessed in each and compared between both of two procedures:"EPLBD with EST"and"EPLBD without EST".A total of 2511 procedures from 30 published articles were included in EPLBD with EST,while a total of413 procedures from 3 published articles were included in EPLBD without *** the results of outcomes,the overall success rate was 96.5%in EPLBD with EST and97.2%in EPLBD without EST,showing no significant difference between both of *** initial success rate(84.0%vs 76.2%,P<0.001)and the success rate of EPLBD without EML(83.2%vs 76.7%,P=0.001)was significantly higher,while the rate of use of EML was significantly lower(14.1%vs 21.6%,P<0.001),in EPLBD with *** rate of overall adverse events,pancreatitis,bleeding,perforation,other adverse events,surgery for adverse events,and fatal adverse events were 8.3%,2.4%,3.6%,0.6%,1.7%,0.2%and 0.2%in EPLBD with EST and 7.0%,3.9%,1.9%,0.5%,0.7%,0%and 0%in EPLBD without EST,respectively,showing no significant difference between both of *** conclusion,recent accumulated results of EPLBD with or even without EST suggest that it is a safe and effective procedure for the removal of large or difficult bile duct stones without any additional risk of severe adv

关键词： Balloon dilation Endoscopic sphincteroto-my Common bile duct gallstones Lithotripsy Compli-cations Assessment Patient outcomes

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Metabolic syndrome, lifestyle risk factors, and distal colon adenoma: A retrospective cohort study

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World Journal of Gastroenterology 2011年第35期17卷 4031-4037页

作者： Moon-Chan Kim chang-Sup Kim Tae-Heum Chung Hyoung-Ouk Park Cheol-In yoo Department of Family Medicine Ulsan University Hospital University of Ulsan College of Medicine Ulsan 682-714 South Korea Department of Occupational and Environmental Medicine Ulsan University Hospital

AIM: To investigate relationships between colorectal adenoma incidence, metabolic syndrome (MS) components and lifestyle factors. METHODS: We conducted a retrospective cohort study using data from individuals who had multiple sigmoidoscopies for colon cancer at the Health Promotion Center of Ulsan University Hospital in Korea from 1998 to 2007. RESULTS: By multivariate analysis, the incidence of distal colon adenoma was increased by more than 1.76 times in individuals with at least one component of MS compared to those without a component of MS. After adjustment for age, gender, smoking, drinking, and physical exercise, only high body mass index (BMI) was significantly associated with the incidence of distal colon adenoma (Hazard ratio 1.66, 95% confidence interval 1.05-2.62). CONCLUSION: Our results suggest that high BMI may increase the risk of colorectal adenoma in Korean adults.

关键词： Body mass index Distal colon adenoma Korea Lifestyle risk factor Metabolic syndrome

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Co-deposition of lithium with rare earth from molten chlorides

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Chinese Journal of Chemistry 1991年第1期9卷 27-33页

作者： chang Kai-Guo ZHAO min-Shou changchun Institute of Applied Chemistry Academia SinicaChangchun 130022

The possibility of co-depostion of Li(Ⅰ)with RE(Ⅱ)has been investigated. The influ- ences of temperature and concentration of chlorides on the deposition potential have been studied. Linear scanning voltammetry, cyclic voltammetry and current reversal chronopotentiometry were used to study the co-deposition process. Both the electrochemical and electrolytic results clearly showed that Li(Ⅰ) and RE (Ⅱ) could co-deposit on the aluminum-copper electrode under selected conditions. Small amount of rare earth element behaved excellently as grain refiner in aluminum-lithium alloy.

关键词： lithium voltammetry electrolytic behaved reversal molten clearly possibility refiner resultant

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Ligamentum flavum hematoma following a traffic accident:A case report

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World Journal of Clinical Cases 2021年第21期9卷 6125-6129页

作者： Dongwoo Yu Wonho Lee min Cheol chang Department of Neurosurgery College of MedicineYeungnam UniversityTaegu 705-717South Korea Department of Radiology Topspine HospitalTaegu 41931South Korea Department of Physical Medicine and Rehabilitation Spine CenterCollege of MedicineYeungnam UniversityTaegu 705-717South Korea

BACKGROUND Ligamentum flavum hematoma(LFH)can cause compression of the spinal cord or nerve root,which results in neurological *** report a case of lumbar radicular pain due to LFH following a traffic *** SUMMARY A 59-year-old man complained of left buttock and lateral thigh pain that was dull in nature after a traffic accident 18 d prior to *** resonance imaging(MRI),taken 17 d after the traffic accident,revealed a mass lesion at the L4-5 *** MRI findings suggested subacute *** patient’s pain was not alleviated with conservative treatment,including oral medication and epidural steroid *** a partial-hemilaminectomy and removal of LFH,the patient’s pain completely *** Because early operation for decompression is important for a good outcome,clinicians should be able to determine LFH from MRI results and be aware of the possibility of LFH,especially in patients with a history of trauma.

关键词： Liga-mentum flavum hematoma Traffic accident Radicular pain Laminectomy Magnetic resonance imaging Case report

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Valsalva retinopathy following esophagogastroduodenosco py under propofol sedation:A case report

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World Journal of Gastroenterology 2014年第11期20卷 3056-3058页

作者： Ju-Hong Park min Sagong Woohyok chang Department of Ophthalmology Yeungnam University College of MedicineDaegu 705-717South Korea

We report a case of Valsalva retinopathy associated with esophagogastroduodenoscopy (EGD) under propofol sedation. A 43-year-old woman who had no previous history of systemic or ocular disease presented with a complaint of decreased vision in her left eye, which developed one day after EGD under propofol sedation. According to the referring physician, the patient had experienced multiple sustained Valsalva maneuvers during EGD. The fundus examination of the left eye showed a large preretinal hemorrhage surrounded by multiple small retinal hemorrhages in the posterior pole. One month later, fundus examination revealed a floating organized vitreous hemorrhage. The pars plana vitrectomy was performed to treat persistent vitreous hemorrhage. One month after vitrectomy, fundus examination showed normal retina and the patient’s vision recovered to 20/20. Valsalva maneuver can occur during EGD under sedation, and Valsalva retinopathy should be considered as a possible cause. Valsalva retinopathy should be included in the differential diagnosis when a patient complains of blurred vision following EGD.

关键词： Esophagogastroduodenoscopy Propofol Sedation Valsalva retinopathy

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