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Rescue from complications after pancreaticoduodenectomies at a low-volume Caribbean center:Value of tailored peri-pancreatectomy protocols

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World Journal of Gastrointestinal Surgery 2024年第3期16卷 681-688页

作者： Shamir O Cawich Elijah Dixon Parul J Shukla Shailesh V Shrikhande Rahul R Deshpande Fawwaz Mohammed Neil W Pearce Wesley Francis Shaneeta Johnson johann Bujhawan Department of Surgery University of the West IndiesSt Augustine 000000Trinidad and Tobago Department of Surgery Faculty of MedicineUniversity of CalgaryCalgaryAlberta T2N2T9Canada Department of Surgery Weill Cornell Medical CollegeNew YorkNY 10065United States Department of Surgical Oncology Tata Memorial CenterHomi Bhabha National UniversityMumbai 400012India Department of Surgery Manchester Royal InfirmaryManchester M139WLUnited Kingdom University Surgical Unit Southampton General HospitalSouthampton SO166YDUnited Kingdom Department of Surgery University of the West IndiesNassau N-1184Bahamas Department of Surgery Morehouse School of MedicineAtlantaGA 30310United States Department of Surgery General Hospital in Port of SpainPort of Spain 000000Trinidad and Tobago

BACKGROUND Pancreaticoduodenectomy(PD)is a technically complex operation,with a re-latively high risk for *** ability to rescue patients from post-PD complications is as a recognized quality *** protocols were instituted at our low volume facility in the year *** To document the rate of rescue from post-PD complications with tailored protocols in place as a measure of *** A retrospective audit was performed to collect data from patients who experienced major post-PD complications at a low volume pancreatic surgery unit in Trinidad and Tobago between January 1,2013 and June 30,***-dardized definitions from the International Study Group of Pancreatic Surgery were used to define post-PD complications,and the modified Clavien-Dindo classification was used to classify post-PD *** Over the study period,113 patients at a mean age of 57.5 years(standard deviation[SD]±9.23;range:30-90;median:56)underwent PDs at this *** complications were recorded in 33(29.2%)patients at a mean age of 53.8 years(SD:±7.9).Twenty-nine(87.9%)patients who experienced major morbidity were salvaged after aggre-ssive treatment of their ***(3.5%)died from bleeding pseudoaneurysm(1),septic shock secondary to a bile leak(1),anastomotic leak(1),and myocardial infarction(1).There was a significantly greater salvage rate in patients with American Society of Anesthesiologists scores≤2(93.3%vs 25%;P=0.0024).CONCLUSION This paper adds to the growing body of evidence that volume alone should not be used as a marker of quality for patients requiring *** low volumes at our facility,we demonstrated that 87.9%of patients were rescued from major *** attributed this to several factors including development of rescue protocols,the competence of the pancreatic surgery teams and continuous,and adaptive learning by the entire institution,cul-minating in the development of tailored peri-pancreatectomy protoc

关键词： Pancreas Complication Rescue Failure Morbidity Mortality Pancreaticoduodenectomy

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General Solutions of First-Order Algebraic ODEs in Simple Constant Extensions

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系统科学与复杂性学报:英文版 2023年第4期36卷 1769-1788页

作者： MITTERAMSKOGLER johann Josef WINKLER Franz Research Institute for Symbolic Computation(RISC) Johannes Kepler Universität LinzA-4040 LinzAustria

If a first-order algebraic ODE is defined over a certain differential field,then the most elementary solution class,in which one can hope to find a general solution,is given by the adjunction of a single arbitrary constant to this *** of this type give rise to a particular kind of generic point—a rational parametrization—of an algebraic curve which is associated in a natural way to the ODE’s defining *** for the opposite direction,we show that a suitable rational parametrization of the associated curve can be extended to a general solution of the ODE if and only if one can find a certain automorphism of the solution *** automorphisms are determined by linear rational functions,i.e.,Möbius *** properties of rational parametrizations,in combination with the particular shape of such automorphisms,lead to a number of necessary conditions on the existence of general solutions in this solution ***,the desired linear rational function can be determined by solving a comparatively simple differential system over the ODE’s field of *** results hold for arbitrary differential fields of characteristic zero.

关键词： Algebraic curve algebraic differential equation general solution Möbius transformation rational parametrization

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超细粉掺合料专用聚羧酸减水剂的制备及性能研究

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新型建筑材料 2024年第1期51卷 49-53,64页

作者：谢瑞兴于奂泽岳光亮唐樱燕彭立刚于彭 johann Plank 山东众森新材料有限公司山东济南250000 北京王府学校北京102209 山东众森科技股份有限公司山东济南250000 德国慕尼黑工业大学德国慕尼黑80539

为解决超细粉掺合料在混凝土应用中出现的黏度大、流速时间长、易抓底、收缩大的问题,通过合成原料的选择以及调整合成工艺,合成了超细掺合料专用聚羧酸减水剂ZS-CX。结果表明,采用EPEG单体、合成起始温度15℃、滴加反应时间60 min,MAP... 详细信息

为解决超细粉掺合料在混凝土应用中出现的黏度大、流速时间长、易抓底、收缩大的问题,通过合成原料的选择以及调整合成工艺,合成了超细掺合料专用聚羧酸减水剂ZS-CX。结果表明,采用EPEG单体、合成起始温度15℃、滴加反应时间60 min,MAP用量为单体质量的0.6%时,制备的减水剂性能最佳。与市售减水剂相比,净浆流动度、混凝土坍落度和扩展度增大,倒筒排空时间更短,达到5 s,Zeta电位绝对值大,而且混凝土60 d电通量小于1000 C、收缩率降低30%以上。

关键词：超细粉掺合料聚羧酸减水剂合成混凝土性能

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Rainwater harvesting in the challenge of droughts and climate change in semi-arid Brazil

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Journal of Southeast University(English Edition) 2014年第2期30卷 164-168页

作者： johann Gnadlinger Regional Institute for Appropriate Small-Scale Agriculture

Some successful experiences of rainwater harvesting in Brazil’s semi-arid region are shown how rural communities are living during the severe drought from 2011 to 2013 using technologies of rainwater harvesting for the household in agriculture livestock raising and the *** from the positive experiences principles of living in the challenge of droughts and climate change are elaborated and summarized into different guidelines for sustainable livelihood and production access to water and sufficient land area rainwater harvesting to provide water security to households and communities preservation recovering and management of drought-resistant vegetation emphases on raising of small and medium sized livestock and water and forage storage appropriate crop selection and sustainable extraction processing and marketing of crop products capacity building of the people. These principles contribute to preparing a national policy on living in harmony with the semi-arid climate. Rainwater harvesting is an important part of a package of measures which enables a sustainable livelihood in such a difficult environment.

关键词： rainwater harvesting semi-arid climate resilience sustainable livelihood policies

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Bare-throated spurfowl(Pternistis spp.)males across Africa impress females with bright throat colours during courtship

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Avian Research 2023年第3期14卷 416-424页

作者： johann H.van Niekerk Department of Environmental Sciences College of Agriculture and Environmental SciencesUniversity of South AfricaP.O.Box 392Pretoria0003South Africa

The role of bare body parts in sexual signalling in birds has received relatively little attention.I describe how the bare-throated spurfowl males saturate the colours of their throats to attract *** the 23 Afrotropical spurfowl species,the bare-throated subgroup includes Yellow-necked Spurfowl(Pternistis leucosceptus),Rednecked Spurfowl(***),Grey-breasted Spurfowl(***) and Swainson’s Spurfowl(***).The rest of the species include fully feathered throated *** colour intensity of bare throats was scored using an extensive online digital photographic archive encompassing the four species across the year’s *** throat(n=836) was assigned to one of four colour-intensity categories to explore the relationship between colour intensities,breeding cycles,and environmental *** for Swainson’s Spurfowl male saturation of throat colours correlated with monthly rainfall,which peaks one or two months before egg ***’s Spurfowl peaks during egg ***-necked Spurfowl has the largest bare ***-throated spurfowl males perform an elevated courtship display posture above the female to feature their throat *** such displays occur in feather-throated *** with low throat colour saturation harbour more ectoparasites on their bare throats than birds with saturated *** Red-necked Spurfowls have significantly larger bare throats than *** primary function of bare throats probably assists in thermoregulation,particularly in arid *** bare throat may have evolved a secondary role in ***-necked,Red-necked,and Greybreasted Spurfowls use their saturated throat colours as ornaments to court females during the breeding *** female throat colours(unsaturated) may discourage male interlopers and predation during egg *** appears to be carotenoid-food *** different colours among the bare-throated species may serve as prezygotic mechani

关键词： Bare-throated spurfowls Breeding Colour saturation Ornaments Pternistis spp. Sexual size dimorphism

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Vocal behavior of Crested Guineafowl(Guttera edouardi) based on visual and sound playback surveys in the Umhlanga Lagoon Nature Reserve,Kwa Zulu-Natal province,South Africa

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Chinese Birds 2015年第3期6卷 132-139页

作者： johann H.van Niekerk Department of Environmental Sciences College of Agriculture and Environmental SciencesUniversity of South Africa

Background:Generally speaking,playbacks were often ineffective to determine the group sizes of birds since mainly males from leks *** limitation has not been tested properly for flocking birds such as Crested Guineafowl(Guttera edouardi) with the view to use it as a counting *** aims of the study reported in this paper were(1) to describe the cal s of Crested Guineafowl in a social context;(2) to interpret cal s in an evolutionary context;and(3) to demonstrate that playbacks can be used to locate and count Crested Guineafowl in smal isolated ***:The vocal behavior of Crested Guineafowl was observed during a survey conducted in the Umhlanga Lagoon Nature Reserve(Kwa Zulu-Natal,South Africa) from November 2010 to June *** line observations and sound playback methods were ***:The behavioral context and structure of cal s were *** eight cal s described for Crested Guineafowl were produced mainly to unite flock members in the dense understory,where visibility was poor,and to repel *** not disturbed,Crested Guineafowl were quiet and only made soft contact ***:The high rate of call back and the fact that flocks invariably approach the source of the call en masse,shows that field researchers are able to assess the population size of Crested Guineafowl with sound playbacks along a *** value of playbacks as a conservation tool is assessed.

关键词： Guttera edouardi Playback Calls Social behavior Flocking Transect surveys

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Orange River Francolins(Scleroptila levaillantoides)persist in fragmented Highveld farming landscapes,South Africa

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Avian Research 2017年第2期8卷 83-90页

作者： johann H.van Niekerk Department of Environmental Sciences College of Agriculture and Environmental ScienceUniversity of South AfricaPO Box 392Pretoria 0003South Africa

Background:How do Orange River Francolins(Scleroptila levaillantoides) adapt to an intensive farming landscape with grass(grazing) camps and crop cultivation? To answer this question, a study was carried out in south-east of johannesburg in South Africa to clarify the interaction of francolins with a landscape consisting of land use ***:A transect-road of 45 km was traversed weekly during November 2015–October 2016 through flat maize(Zea mays) and cattle(Bos primigenius) grazing fields. Francolins were counted in three land use mosaic types along the transect-road(including the road):grass camps on both sides of the road(grass/grass edges); arable fields on both sides(arable/arable edges) and arable land on one side with grass camps on the opposite side of the road(arable/grass edges).Results:Francolins used all three mosaic types, but the arable/arable edges were least frequented. Nonetheless, the arable/arable edges played an important part:francolins, including females with chicks, moved along the arable/arable edges, which enabled contact between sub-populations, and the arable/arable edges provided temporary cover(e.g. stubble and maize plants) and ploughed firebreaks to forage(e.g. for bulbs).Conclusion:Cultivation of crop within grasslands does not constrain breeding, movement and habitat use by the Orange River Francolin. For conservation purposes it is critical that the fine-scale mosaic of grazing and cultivation areas remain intact.

关键词： Agriculture Edge habitat Management Mosaics Orange River Francolin Scleroptila levaillantoides

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Population structure and mating system of the Red-crested Korhaan(Lophotis ruficrista) in South Africa

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Chinese Birds 2015年第1期5卷 43-51页

作者： johann H van Niekerk Department of Environmental Sciences College of Agriculture and Environmental Sciences University of South Africa

Background: The mating system of the korhaans and bustards in southern Africa is either based on polygyny or monogamy. The Red-crested Korhaan(Lophotis ruficrista) has been described as polygynous but otherwise very little is known about its breeding biology. The aims were to describe the population structure and male behavior during ***: The data collected for this paper was mainly based on field transect surveys carried out in 2009, 2010 and 2011. The population structure of the Red-crested Korhaan in the temperate Borakalalo Game Reserve(BGR)was compared with that in the arid Molopo Nature Reserve(MNR)(both situated in the North West province of South Africa). The study was mainly conducted in the BGR but additional work was conducted in the MNR for ***: The difference in mean group sizes between MNR(1.03) and BGR(1.07) was statistically not *** sizes were not affected by climate despite the fact that the BGR received about 650 mm precipitation per annum and the MNR about 200 mm. In both reserves the apparent sex ratios were skewed in favor of males(1:0.29 in the BGR and 1:0.1 in the MNR). The population was dispersed in a clumped manner which is ascribed to the formation of leks. Leks were positioned in open habitat while females invariably concealed themselves under ***: The leks formed the pivot of the mating system of the Red-crested Korhaan and are identifiable social structures that field ecologists can use to monitor population stability.

关键词： Lophotis ruficrista Leks Mating system Dispersion Group size

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On the structure in the ΛN cross section at the ∑N threshold

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Chinese Physics C 2021年第9期45卷 157-166页

作者： johann ha.denbauer Uf-G.MeiBner Institute for Advanced Simulation Institut fur Kemphysik and Julich Center for Hadron PhysicsForschungszentrum JulichD-52425 JulichGermany Helmholtz-Institut fiir Strahlen-und Kemphysik and Bethe Center for Theoretical Physics Universitat Bonn53115 BonnGermany Tbilisi State University 0186 TbilisiGeorgia

The complexity of threshold phenomena is exemplified on a prominent and long-known case-the structure in theΛp cross section(invariant mass spectrum)at the opening of the∑N *** mass splitting between the∑baryons together with the angular momentum coupling in the^(3)S_(1)-^(3)D_(1)partial wave imply that,in principle,up to six channels are *** hyperon-nucleon potentials that provide an excellent description of the available low-energy Λp and∑N scattering data,the shape of the resulting Λp cross section is discussed and the poles near the ∑N threshold are *** for a strangeness S=-1 dibaryon is provided,in the form of a(unstable)∑N bound state in the vicinity of the ∑N *** for level shifts and widths of ∑^(-)p atomic states are given.

关键词： hyperon-nucleon interaction dibaryon threshold effects

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Targeting leukemic fusion proteins with small interfering RNAs:recent advances and therapeutic potentials

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Acta Pharmacologica Sinica 2006年第3期27卷 273-281页

作者： Maria THOMAS johann GREIL Olaf HEIDENREICH Department of Molecular Biology Interfaculty Institute for Cell BiologyEberhard Karls University TuebingenAuf der Morgenstelle 1572076 TuebingenGermany Paediatric University Hospital Im Neuenheimer Feld 15369120 HeidelbergGermany

RNA interference has become an indispensable research tool to study gene func-tions in a wide variety of *** of their high efficacy and specificity,RNA interference-based approaches may also translate into new therapeutic stra-tegies to treat human *** particular,oncogenes such as leukemic fusionproteins,which arise from chromosomal translocations,are promising targets forsuch gene silencing approaches,because they are exclusively expressed in pre-cancerous and cancerous tissues,and because they are frequently indispensablefor maintaining the malignant *** review summarizes recent deve-lopments in targeting leukemia-specific genes and discusses problems andapproaches for possible clinical applications.

关键词： small interfering RNA small hairpin RNA RNA interference leukemic fusion genes leukemia

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