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femoral shaft fractures——Reamed versus unreamed intramedullary nailing

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中华创伤骨科杂志 2004年第9期 92-94页

作者： James f.Kellam,Ladislav Nagy,Rodrigo f.Pesantez AO Publishing Stettbachstrasse 10 CH-8600 Dübendorf Switzerland AO Publishing Stettbachstrasse 10 CH-8600 Dübendorf Switzerland AO Publishing Stettbachstrasse 10 CH-8600 Dübendorf Switzerland

It appears that unreamed nailing is significantly faster (operative time) with less blood loss compared with unreamed nailing in the treatment of femoral shaft fractures; however, reamed nailing contributes to faster union times and fewer delayed unions. Neither appears to significantly increase the risk of other complications including pulmonary compromise. functional outcomes cannot be determined.

关键词： femoral shaft fracture Reamed intramedullary nailing Unreamed intramedullary nailing

Seasonal changes in sperm parameters, testicular histology and circulating levels of reproductive hormones in the male African straw-colored fruit bat (Eidolon helvum)

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Asian pacific Journal of Reproduction 2020年第4期9卷 197-203页

作者： Clifford N Abiaezute Chike f Oguejiofor Innocent C Nwaogu Ikechukwu R Obidike Udensi M Igwebuike Department of Veterinary Anatomy Faculty of Veterinary MedicineUniversity of NigeriaNsukka 410001Nigeria Department of Veterinary Obstetrics and Reproductive Diseases Faculty of Veterinary MedicineUniversity of NigeriaNsukka 410001Nigeria Department of Veterinary Physiology and Pharmacology Faculty of Veterinary MedicineUniversity of NigeriaNsukka 410001Nigeria

Objective: To investigate seasonal changes in some reproductive characteristics of the male African straw-colored fruit bat [Eidolon (E.) helvum] in a tropical rain forest area of South-East ***: Spermatozoal characteristics in the testes and cauda epididymides, testicular histology, and the circulating levels of the reproductive hormones, testosterone, follicle stimulating hormone and luteinizing hormone were evaluated in male bats captured in late January (peak dry season), late May (early rainy season) and late September (late rainy season) of 2019. The bats were captured in Obiagu community in Enugu State, South-East Nigeria. Data were analyzed with analysis of variance. Results: There were high serum concentrations of testosterone in early and late rainy season and of luteinizing hormone in early rainy season, but the concentrations of both hormones were low during peak dry season. These hormonal changes corresponded with the testicular seminiferous and spermatogenic activities and testicular and epididymal sperm concentrations, which were also maximal during early and late rainy season but minimal during peak dry season. Epididymal sperm motility and vitality were also high in early and late rainy season but low in peak dry season, while sperm morphological abnormalities were low in early and late rainy season but elevated in peak dry season. There was histological evidence that spermatogenesis did not cease completely during testis regression, but continued at a reduced rate during the dry season. Conclusions: The findings do not support concurrent epididymal sperm storage with testis regression in E. helvum. Altogether, these indicate that seasonal changes significantly alter sperm characteristics, testicular histology and circulating levels of reproductive hormones in E. helvum within the study area.

关键词： Eidolon helvum Spermatozoa Reproductive characteristics Seasonal changes

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秸秆分拨引导式玉米免耕防堵机构设计与试验

农业机械学报 2019年第8期50卷 52-58页

作者：牛萌萌方会敏 CHANDIO f A 史嵩薛艳芳刘虎山东省农业机械科学研究院济南250100 信德农业大学农业工程学院坦杜阿拉亚70060 山东省农业科学院玉米研究所济南250100

为解决免耕播种机麦茬地作业的拥堵问题,在拨抛式防堵装置的基础上提出秸秆分拨引导的防堵设计思路,设计了阿基米德螺线型防堵机构。该装置可引导秸秆攀升,实现层叠堆积,缓解秸秆平行拨离苗带时造成的秸秆局部集中,从而实现有效防堵。... 详细信息

为解决免耕播种机麦茬地作业的拥堵问题,在拨抛式防堵装置的基础上提出秸秆分拨引导的防堵设计思路,设计了阿基米德螺线型防堵机构。该装置可引导秸秆攀升,实现层叠堆积,缓解秸秆平行拨离苗带时造成的秸秆局部集中,从而实现有效防堵。运用离散元分析软件EDEM 2.7,建立了秸秆土壤防堵机构相互作用的仿真模型,分别对单个目标秸秆和秸秆群体进行运动追踪,验证了分拨引导和层叠堆积理念。对试验样机进行了田间性能试验和作业参数优选试验,结果表明:在播种过程中,阿基米德螺线型防堵机构作业顺畅,未发生中、重度堵塞及晾籽;防堵机构最佳工作参数为前进速度7 km/h、转速600 r/min,此时秸秆清除率最高,为92.6%。本文设计的防堵机构性能优于前期课题组设计的防堵机构和某商品化防堵机构。

关键词：玉米免耕播种机防堵机构分拨引导阿基米德螺线

Laparoscopic Management of Undescended Testis: Results and Outcomes in a Pediatric Population

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Open Journal of Pediatrics 2022年第1期12卷 47-58页

作者： C. Kamadjou H. E Moby A. Kameni E. Muhawenimana f. f. Mouafo Tambo f. Angwafor Medical and Surgical Center of Urology Douala Cameroon faculty of Medicine and Pharmaceutical Sciences Department of Surgery and Specialties University of Douala Douala Came-roon Kigali Teaching Hospital Kigali Rwanda Gynaeco Obstetric and Pediatric Hospital Yaounde Cameroon Urology Residency Program Faculty of Medicine and Biomedical Sciences University of Yaoundé I Yaoundé Cameroon

Aim: This study aimed to evaluate the results of the laparoscopic treatment of high and intra-abdominal undescended testes. Methods: A retrospective study was carried out from 2014 to 2021 at the Centre medico-chirugicale d’urologie in Douala. We consulted the clinical records of 27 patients aged 6 - 15 years who underwent laparoscopic orchiopexy at our hospital. We included patients with unilateral or bilateral undescended testes as detected by palpation and excluded patients with incomplete clinical records. The data collected were entered into Microsoft Excel 2016 and exported to Epi info 7 for analysis. Continuous variables were presented as mean values and standard deviations while categorical variables were presented as frequencies and percentages. The threshold for statistical significance was set at p Results: The ages of the 27 participants ranged from 6 years to 15 years, with a mean age of 10.22 ± 2.68 years. Hypospadias was an associated abnormality in 7.41% of participants. The mean duration of the surgical procedure was 80.56 ± 30.30 minutes. The overall success rate of the laparoscopic procedure was 95.83%. The mean duration of postoperative hospital stay was 26.67 ± 7.69 hours. The only postoperative complication we encountered was testicular atrophy, which occurred in 7.41% of participants. All our patients underwent single-stage laparoscopic procedures. Conclusion: Laparoscopy, which is the technique of choice for the diagnosis and management of undescended testis, is more rapid, more effective, and characterized by a shorter hospital stay and fewer postoperative complications compared to open surgery. Single-stage procedures are as effective and safe as two-stage procedures.

关键词： Undescended Testis Laparoscopy Orchiopexy Orchiectomy Single-Stage Procedure

Computational fluid dynamics simulation on the longwall gob breathing

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International Journal of Mining Science and Technology 2017年第2期27卷 185-189页

作者： Samuel A.Lolon Jürgen f.Brune Gregory E.Bogin Jr. John W.Grubb Saqib A.Saki Aditya Juganda Department of Mining Engineering Colorado School of MinesCO 80401USA Department of Mechanical Engineering Colorado School of Mines CO 80401USA

In longwall mines, atmospheric pressure fluctuations can disturb the pressure balance between the gob and the ventilated working area, resulting in a phenomenon known as ‘‘gob breathing". Gob breathing triggers gas flows across the gob and the working areas and may result in a condition where an oxygen deficient mixture or a methane accumulation in the gob flows into the face area. Computational fluid Dynamics(CfDs) modeling was carried out to analyze this phenomenon and its impact on the development of an explosive mixture in a bleeder-ventilated panel scheme. Simulation results indicate that the outgassing and ingassing across the gob and the formation of Explosive Gas Zones(EGZs) are directly affected by atmospheric pressure changes. In the location where methane zones interface with mine air, EGZ fringes may form along the face and in the bleeder entries. These findings help assess the methane ignition and explosion risks associated with fluctuating atmospheric pressures.

关键词： CfDs Gob breathing barometric pressure Explosive gas zone Longwall mine Methane explosion

Phylogeny and taxonomy of Ophiognomonia(Gnomoniaceae,Diaporthales),including twenty-five new species in this highly diverse genus

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fungal Diversity 2012年第6期57卷 84-146页

作者： Donald M.Walker Lisa A.Castlebury Amy Y.Rossman Luis C.Mejía James f.White Department of Natural Sciences The University of FindlayFindlayOH 45840USA Systematic Mycology&Microbiology Laboratory USDA Agricultural Research ServiceBeltsvilleMD 20705USA Smithsonian Tropical Research Institute Apartado0843-03092BalboaAnconRepublic of Panama Department of Plant Biology and Pathology Rutgers UniversityNew BrunswickNJ 08901USA

Species of Ophiognomonia are leaf-inhabiting endophytes,pathogens,and saprobes that infect plants in the families Betulaceae,fagaceae,Juglandaceae,Lauraceae,Malvaceae,Platanaceae,Rosaceae,Salicaceae,and *** on extensive collecting,this speciesrich genus is now known to have a world wide distribution in primarily temperate areas,although some species are known from the *** of DNA sequences from three markers including guanine nucleotide-binding protein subunit beta-like protein(MS204),translation elongation factor 1α(tef-1α),and the ITS region including ITS1,5.8 S rDNA and ITS2 regions(ITS)were used to define phylogenetic species in *** plant association correlated with these ***-five new species of Ophiognomonia and two new combinations are proposed with descriptions and *** addition,descriptions and illustrations are provided for 12 other species of Ophiognomonia.A key is provided to the 45 currently accepted species of *** disposition of additional names in Ophiognomonia is also discussed.

关键词： Birch foliar pathogen Butternut canker GCPSR Genealogical sorting index Host associations MS204 Multilocus phylogeny Walnut anthracnose and leaf blotch

Peliosis hepatis associated with hereditary haemorrhagic telangiectasia

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Gastroenterology Report 2013年第3期1卷 203-206页

作者： f.Alessandrino P.f.felisaz A.La fianza foundation IRCCS Policlinico San MatteoInstitute of RadiologyUniversity of PaviaPaviaItaly

Hereditary haemorrhagic telangiectasia(HHT)is an autosomal,predominantly inherited disease characterized by diffuse telangiectases involving the skin,mucous membranes,lung,brain,gastrointestinal tract and *** hepatis is a rare,benign disorder causing sinusoidal dilatation and the presence of multiple blood-filled lacunar spaces within the *** report a case of an HHT patient with incidental magnetic resonance findings of focal hepatic peliosis.

关键词： peliosis hepatis hereditary haemorrhagic telangiectasia magnetic resonance imaging

Lattice Distortion Analysis Directly from High Resolution Transmission Electron Microscopy Images —the LADIA Program Package

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Journal of Materials Science & Technology 2002年第2期18卷 135-138页

作者： Y.Rau, N.Y.Jin-Phillipp and f.PhillippMax-Planck-Institut fiir Metallforschung, Heisenbergstrasse 1, Stuttgart, D-70569, Germany [ Manuscript received November 22, 2001] Max-Planck-Inst. für Metall. Heisenbergstrasse 1 D-70569 Stuttgart Germany

Direct strain mapping from high resolution transmission electron microscopy images is possible for coherent structures. At proper imaging conditions the intensity peaks in the image have a constant spatial relationship with the projected atom columns. This allows the determination of the geometry of the projected unit cell without comparison with image simulations. The fast procedure is particularly suited for the analysis of large areas. The software package LADIA is written in the PV-WAVE code and provides all necessary tools for image processing and analysis. Image intensity peaks are determined by a cross-correlation technique, which avoids problems from noise in the low spatial frequency range. The lower limit of strain that can be detected at a sampling rate of 44 pixels/nm is≈2%.

关键词： High-resolution transmission electron microscopy Distortion analysis

Hakim-Adams syndrome secondary to syphilis

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Case Reports in Clinical Medicine 2013年第6期2卷 377-379页

作者： Ricardo Krause Martinez de souza Alexandre Zatera fernanda Leal Suzano flavia de Oliveira Braga Samanta fabrício Blattes da Rocha Ricardo Ramina Pedro Andre Kowacs Ambulatorio de Desordens da Memoria e do Comportamento Instituto de Neurologia de CuritibaCuritibaBrazil Instituto de Psiquiatria do Parana CuritibaBrazil Servico de Neurologia e Neurocirurgia CuritibaBrazil

Normal pressure hydrocephalus (NPH) secondary to syphilis is an atypical form of neurosyphilis with an unusual clinical presentation and uncommon neuroimaging findings. A case of Syndrome de Hakim-Adams occurring in a 79-year-old male was admitted for investigation of a dementia syndrome. The patient presented with clinical features and neuroimaging compatible with NPH. Syphilis serology was reactive and compatible with active disease. The patient was treated with crystalline penicillin (4 million units every 4 hours for 21 days) and was assessed again after three months, when his cognition and gait had improved and the urinary incontinence had resolved. According to this information, we describe a case of syphilis mimicking normal pressure hydrocephalus, making clear the importance of the investigation of sexually transmitted diseases in the differential diagnosis of dementia, even in patients without established risk supposedly.

关键词： Neurosyphilis Hakim-Adams Syndrome Syphilis Normal Pressure Hydrocephalus