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An extremely rare pedunculated lipoma of the hypopharynx: A case report

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World Journal of Clinical Cases 2019年第17期7卷 2652-2657页

作者： Qiang Sun chun-lin zhang Zhao-Hui Liu Department of Otolaryngology Head and Neck Surgery Affiliated Hospital of Zunyi Medical University

BACKGROUND Hypopharyngeal lipoma is a rare disease that can lead to asphyxiation after *** lipoma in the hypopharynx is an extremely rare histological *** lipoma should be resected in time after *** SUMMARY An 86-year-old female patient presented to our department with a long pedunculated mass protruding from her *** this time,the patient had no dyspnea,dysphagia,or throat *** examination showed stable vital signs and clear *** pedicel was derived from the posterior wall of the *** tumor was smooth,hyperemic and dark red,about 10 cm long,and 4 cm *** order to prevent airway obstruction,the hypopharyngeal tumor was excised in emergent *** pharyngeal cavity was exposed by a mouth gag during the operation.A disposable plasma knife was used to completely remove the tumor along the base of the new organism,and no active bleeding *** postoperative pathological results were sclerotic *** Lipoma in the pharynx is relatively *** with this condition must be referred immediately to Ear-Nose-Throat specialists and complete surgical excision should be performed as soon as possible to prevent serious complications,such as airway obstruction and death.

关键词： Hypopharynx tumor Sclerotic lipoma Plasma Case report

A facile protocol for N-Cbz protection of amines in PEG-600

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Chinese Chemical Letters 2012年第7期23卷 789-792页

作者： chun lin zhang Dong Feng zhang Hong Yi Zhao Zi Yun lin Hai Hong Huang Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation Institute of Materia MedicaPeking Union Medical College and Chinese Academy of Medical SciencesBeijing 100050China

An efficient and eco-friendly protocol for the chemoselective N-benzyloxycarbonylation of amines was *** reaction of amines with benzyl chloroformate（Cbz-Cl） in the presence of PEG-600 at room temperature afforded the corresponding N-Cbz derivatives in excellent *** method is applicable to the N-Cbz protection of aliphatic（acyclic and cyclic） and aromatic amines.

关键词： Benzyl chloroformate (Cbz-C1) N-Cbz protection Amines PEG-600

PIV EXPERIMENTAL RESEARCH OF INSTANTANEOUS FLOW CHARACTERISTICS OF CIRCULAR ORIFICE SYNTHETIC JET

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Journal of Hydrodynamics 2007年第4期19卷 453-458页

作者： XU Jing-lei SHA Jiang lin chun-feng zhang Kun-yuan School of Energy and Power Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 China

The instantaneous flow characteristics of circular orifice synthetic jet was experimentally studied by a phase-locked Particle Image Velocimetry （PIV） system. The instantaneous flowfields, including the forming, developing and breaking down of the vortex for the jet were clearly shown by the PIV experimental results. As the basis of the study of the instantaneous flow, 36 images were taken and phase-averaged for each condition. The PIV experiment was mainly focused on the time evolution of the vortex pairs formed in the push cycle, the saddle point existing in the suck cycle, the variation of the centerline velocity in the whole cycle and the cross-stream velocity profiles and their self-similarity. Finally, the orifice depth was changed from 1.5 mm to 2 mm and 3.5 mm in order to study the effect of different orifice depths on the flow structure, which shows that at all stream wise sections, the peak of the mass flux and momentum flux increases as the orifice depth increases. Furthermore, the nondimensional distance of the mass flux from the exit is the maximum, while the nondimensional distance of the centerline velocity peak from the exit is the minimum, and nondimensional distance of the momentum flux from the exit section is between them.

关键词： circular synthetic jet Particle Image Velocimetry (PIV) phase-locked

First branchial cleft cyst accompanied by external auditory canal atresia and middle ear malformation:A case report

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World Journal of Clinical Cases 2020年第16期8卷 3616-3620页

作者： chun-lin zhang chun-Lei Li Hang-Qi Chen Qiang Sun Zhao-Hui Liu Department of Otorhinolaryngology Head and Neck SurgeryAffiliated Hospital of Zunyi Medical UniversityZunyi 563000Guizhou ProvinceChina College of Zunyi Medical University Zunyi 563000Guizhou ProvinceChina

BACKGROUND We report a rare case of first branchial cleft anomaly(FBCA)accompanied by bony atresia of the external auditory canal,middle ear malformation,and location malformation of the facial nerve according to the intraoperative *** SUMMARY A 19-year-old male patient presented to our department with a mass behind the right earlobe and recurrent postauricular swelling and pain since childhood,he also had severe hearing loss in the right ear since *** patient underwent surgery including mass removal,mastoidectomy,and simultaneous meatoplasty and ossiculoplasty under *** facial palsy or recurrence was noted during postoperative *** FBCAs are rare,and to our knowledge,this is the first report of FBCA accompanied by external auditory canal bony atresia,middle ear malformation,and location malformation of the facial *** effective postauricular approach under microscopy facilitated complete lesion removal and simultaneous otologic reconstruction.

关键词： First branchial cleft anomaly External auditory canal atresia Middle ear malformation Case report

Study of the gas sources of the Ordovician gas reservoir in the Central-Eastern Ordos Basin

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Petroleum Science 2022年第3期19卷 949-962页

作者： Ji-Jun Li Zi-Wei Song chun-lin zhang Shuang-Fang Lu Mei-Jun Dong Shu-Ning zhang Jun Jiang Key Laboratory of Deep Oil and Gas China University of Petroleum(East China)QingdaoShandong266580China PetroChina Research Institute of Petroleum Exploration and Development Beijing100083China

The source of the natural gas in the Lower Paleozoic Ordovician strata in the Ordos Basin,China is a controversial *** the present study,the genesis and distribution characteristics of the Ordovician natural gas were qualitatively investigated based on the composition of the natural gas and the hydrocarbon isotopic ***,the kinetics of the carbon isotope were analyzed to determine the proportions of the gas in the Ordovician gas reservoir contributed from the Carboniferous-Permian and Ordovician *** results show the *** to the Upper Paleozoic natural gas,the Ordovician natural gas has a large dryness *** core areas where gypsum-salt rocks are developed,the gypsum-salt rocks completely isolate the gas *** weathering crust of the reservoir in the fifth member of the Majiagou Formation(Ma_(5)^(1+2))originates primarily from the Upper Paleozoic coal-measure source rocks,while the Ma_(5)^(5)and the pre-salt natural gas are mainly derived from the Ordovician source *** the areas where the gypsum-salt rocks are relatively well-developed,the gypsum-salt rocks isolate the gas source to some extent,the pre-salt gas reservoir is mainly derived from the Lower Paleozoic source rocks,and this contribution gradually increases with increasing *** the areas where the gypsum-salt rocks are not developed,the proportion of the contribution of the Upper and Lower Paleozoic source rocks to the gas source of the Ordovician gas reservoir is mainly controlled by the volume of gas generated and the other accumulation conditions,and it does not reflect the isolation effect of the gypsum-salt rocks on the gas *** Ordovician natural gas accumulation models in the central-eastern Ordos Basin can be divided into four types according to the differences in the gas sources.

关键词： Ordos Basin Majiagou Formation Carbon isotope kinetics Gypsum layer Gas source

Development of a large nanocrystalline soft magnetic alloy core with highμ'_(p)Qf products for CSNS-Ⅱ

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Nuclear Science and Techniques 2022年第8期33卷 45-54页

作者： Bin Wu Xiao Li Zhun Li chun-lin zhang Yang Liu Wei Long Xiang Li Jian Wu Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Spallation Neutron Source Science Center Dongguan 523803China University of Chinese Academy of Sciences Beijing 100049China

A waterproof nanocrystalline soft magnetic alloy core with a size of O.D.850 mm×I.D.316 mm×H.25 mm for radio frequency acceleration was successfully developed by winding 18μm 1k107b MA ***μ'_(p)Qf products reached 7.5,10,and 12 GHz at 1,3,and 5 MHz,***μ'_(p)Qf products of the MA core(O.D.250 mm×I.D.100 mm×H.25 mm)manufactured using a 13μm MA ribbon further increased by 30%.Detailed improvements on the MA core manufacture process are discussed *** high-power tests on the new MA cores demonstrated its good performance of waterproofness,particularly its stability of highμ'_(p)Qf *** MA core with highμ'pQf product and large size can operate under a high average RF power,high electric field,and in deionized water,which will be used in the China Spallation Neutron Source PhaseⅡ(CSNS-Ⅱ).

关键词： Large size magnetic alloy core High insulation and low stress coating Waterproof structure Transverse magnetic field annealing High power MA-loaded cavity

Positron emission computed tomography/single photon emission computed tomography in Parkinson disease

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Chinese Medical Journal 2020年第12期133卷 1448-1455页

作者： Nian-Ting Yao Qian Zheng Zi-Qian Xu Jian-Hong Yin lin-Guang Lu Qi Zuo Su Yang chun-lin zhang ling Jiao Guizhou Medical University GuiyangGuizhou 550004China Department of Neurology The Affiliated Hospital of Guizhou Medical UniversityGuiyangGuizhou 550004China Department of Biology Guizhou Medical UniversityGuiyangGuizhou 550004China

Parkinson disease(PD)is the second-most common neurodegenerative *** main pathological mechanism is the selective degeneration and deletion of dopaminergic neurons in the dense part of the substantia nigra and the damage of dopaminergic neurons caused by the abnormal deposition of a Lewy body,leading to a decreased dopamine *** emission computed tomography(PET)/single photon emission computed tomography(SPECT)is a molecular imaging technology that can directly or indirectly reflect changes in molecular levels by using a specific *** the research and development on the tracers of related enzymes for labeling dopamine transporter and dopamine receptor and for being involved in dopamine formation,this imaging technology has been applied to all aspects of PD *** not only contributes to clinical work but also provides an important theoretical basis for exploring the pathological mechanism of PD at a molecular ***,this review discusses the application value of PET/SPECT in PD in terms of early diagnosis,disease severity evaluation,clinical manifestations,differential diagnosis,and pathological mechanism.

关键词： Parkinson disease Positron emission computed tomography Single photon emission computed tomography Dopamine transporter ^18F-fluorodeoxyglucose

Influence of sulfate on the generation of bitumen components from kerogen decomposition during catagenesis

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Petroleum Science 2021年第6期18卷 1611-1618页

作者： Jia Wu Wen Qi Fu-Jie Jiang Qing-Yong Luo chun-lin zhang Huan-Zhen Hu Zi Wang Qi-Sheng Ma Yong-chun Tang State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing102249China College of Geoscience China University of Petroleum(Beijing)Beijing102249China PetroChina Research Institute of Petroleum Exploration&DevelopmentdNorthwest LanzhouGansu730020China PetroChina Research Institute of Petroleum Exploration&Development Beijing100083China University of Southern California Los AngelesCA90089USA Power Environmental Energy Research Institute CovinaCA91722USA

High-quality source rocks in saline lacustrine or marine sedimentary environments often show early peak petroleum generation and enhanced hydrocarbon yields,which have conventionally been attributed to organosulfur-enhanced thermal decomposition of kero ***,there is increasing awareness that the coexisting inorganic salts,particularly sulfates,might also contribute to the acceleration of petroleum *** this study,we investigated the influence of sulfates on the thermal decomposition of kerogen sampled from the Pingliang Formation in the Ordos *** results demonstrate that the kerogen samples mixed with sulfate generate more hydrocarbons with a lower peak production temperature than their sulfate-free *** chemical analysis revealed that the presence of sulfates significantly facilitated the generation of resins and asphaltenes at temperatures below 350℃,corresponding in our simulations to the early stage of petroleum generation(Easy%R_o <1.0%).We hypothesize that sulfates can promote the fragmentation of kerogen via direct thermochemical oxidation into a complex mixture of bitumen components that consist mostly of compounds typically encountered in the classical resin and asphaltene *** findings reveal a new reaction paradigm between sulfates and organic macromolecules that could offer useful guidance in the exploration for low-maturity oils.

关键词： Sulfate Kerogen Thermal decomposition Resins and asphaltenes Redox reactions

Treatment of mallet fractures with a transverse two-hole mini plate

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Chinese Medical Journal 2019年第22期132卷 2757-2759页

作者： Ge Xiong Yong-Bin Gao Wei Zheng chun-lin zhang Kun Liu Zi-Run Xiao Department of Hand Surgery Beijing Jishuitan HospitalBeijing 100035China

To the Editor:Mallet fracture is a very common hand *** non-surgical treatment for some small fragment cases without distal interphalangeal joint(DIPJ)subluxation is acceptable,many authors have considered restoring the joint surface with accurate reduction to be important to prevent secondary osteoarthritis,loss of movement,and poor cosmetic outcomes.[1]To obtain an accurate reduction,several reduction and fixation techniques(such as extension block pinning,hook plate fixation,umbrella handle like K-wire fixation,and so on)have been developed.[2-4] But when the fracture fragment is small or comminuted,stable fixation is quite difficult to achieve based on the current *** develop a more universal method to deal with different types of mallet fractures with fewer complications,a transverse two-hole mini plate was used.

关键词： plate transverse handle