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Problems of drinking water treatment along Ismailia Canal Province, Egypt

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2008年第3期9卷 232-242页

作者： Mohamed H.GERIESH Klaus-dieter BALKE Ahmed E.EL-RAYES Geology Department Faculty of ScienceSuez Canal UniversityP.C.41522IsmailiaEgypt Institute of Geosciences Teubingen University72076 TeubingenGermany

The present drinking water purification system in Egypt uses surface water as a raw water supply without a preliminary filtration *** the other hand,chlorine gas is added as a disinfectant agent in two steps,pre-and *** to these reasons most of water treatment plants suffer low filtering effectiveness and produce the trihalomethane(THM) species as a chlorination *** Ismailia Canal represents the most distal downstream of the main Nile *** its water contains all the proceeded pollutants discharged into the *** addition,the downstream reaches of the canal act as an agricultural drain during the closing period of the High Dam gates in January and February every ***,the wide industrial zone along the upstream course of the canal enriches the canal water with high concentrations of heavy *** obtained results indicate that the canal gains up to 24.06×106 m3 of water from the surrounding shallow aquifer during the closing period of the High Dam gates,while during the rest of the year,the canal acts as an influent stream losing about 99.6×106 m3 of its water *** reduction of total organic carbon(TOC) and suspended particulate matters(SPMs) should be one of the central goals of any treatment plan to avoid the disinfectants *** combination of sedimentation basins,gravel pre-filtration and slow sand filtration,and underground passage with microbiological oxidation-reduction and adsorption criteria showed good removal of parasites and bacteria and complete elimination of TOC,SPM and heavy ***,it reduces the use of disinfectants chemicals and lowers the treatment ***,this purification system under the arid climate prevailing in Egypt should be tested and modified prior to application.

关键词： Drinking water treatment Hazardous by-products Natural attenuation Ismailia Canal Egypt

The Impact of Brand Loyalty on Variables Influencing Customer Satisfaction and Online Reviews in the Hospitality Industry

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The Impact of Brand Loyalty on Variables Influencing Custome...

作者： Maximilian dieter Wolfgang Busse 上海交通大学

学位级别：硕士

The purpose of this paper is to investigate the diverging expectations of customer groups in the hospitality industry based on loyalty towards a *** the aim to understand how these expectations and attitudes transform,this paper utilizes user-generated content from more than 5000 unique online reviews of 14 hotels around New York Times Square sourced from ***.A research framework proposes a direct positive relationship between the six independent variables(Cleanliness,Dining,Location,Service,Amenities,Value for the Money)assessed in the online reviews and the dependent variable ‘Total Score'.Furthermore,four levels of loyalty(No,Low,Medium,High)are assumed to be moderators of these *** research findings suggest that ‘Service' is the strongest predictor of the dependent variable,followed by ‘Value for the Money'.‘Dining' is the only factor that fails to moderate the ‘Total Score' for the customer groups with loyalty levels of Medium and ***,a content-based analysis supports the crucial findings revealed by the *** results of this paper emphasize the significance of loyalty and its impact on satisfaction while providing valuable suggestions to find strategies supporting the production of positive user-generated content and stimulating e-Word-of-Mouth.

关键词： Brand Loyalty Consumer Behavior Hospitality Industry User-Generated Content e-Word-of-Mouth

A phylogeographic break and bioacoustic intraspecific differentiation in the Buff-barred Warbler(Phylloscopus pulcher)(Aves:Passeriformes,Phylloscopidae)

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Chinese Birds 2014年第1期5卷 3-14页

作者： Martin Packert Yue-Hua Sun Balduin S Fischer dieter Thomas Tietze Jochen Martens Senckenberg Natural History Collections Museum of ZoologyKonigsbrücker Landstraβe 159D-01109 DresdenGermany Key Laboratory of Animal Ecology and Conservation Institute of ZoologyChinese Academy of Science Institute of Ecology Evolution and DiversityGoethe UniversityMax-von-Laue-Straβe 1360439 Frankfurt am MainGermany Institute of Pharmacy and Molecular Biotechnology University of HeidelbergIm Neuenheimer Feld 36469120 HeidelbergGermany Institut für Zoologie Johannes Gutenberg-Universitat55099 MainzGermany

Background: According to current taxonomy only three out of 27 Sinohimalayan leaf warbler species(Phylloscopidae) are considered genetically uniform across their entire breeding range along the Southeastern margin of the Qinghai-Tibetan Plateau, the Buff-barred Warbler(Phylloscopus pulcher) being one of them. Because marked differentiation among Himalayan and Chinese populations has been recently demonstrated for a number of Phylloscopus species(or sister species) we investigated the intraspecific variation of a mitochondrial gene, songs and morphology of P. pulcher in a phylogeographic ***: We sequenced a fragment of the mitochondrial cytochrome b, reconstructed haplotype networks and analyzed DNA polymorphism among Himalayan and Chinese populations. We measured time and frequency parameters of two distinct song types and analyzed among population-differentiation in a principal component analysis and a discriminant analysis. We also compared measurements of body size dimensions taken from museum ***: The mitochondrial haplotype network(cytb) was divided into two distinct clusters corresponding to geographic origin of samples. Pairwise genetic distances among Himalayan and Chinese mt DNA lineages account for 1.3% which coincides with Pleistocene lineage separation at roughly 650,000 years ago. Genetic diversity is slightly higher in the Chinese part of the species' range with respect to haplotype and nucleotide diversity while the less diversified Himalayan population lineage shows signs of recent range expansion. The vocal repertoire of P. pulcher comprises two distinct verse types that are combined with short interspersed click notes to long continuous song displays. Trill verse types showed significant differences among regions in almost all measured frequency and time parameters: Chinese males displayed more rapid and more broad-banded trills at a lower pitch. In contrast,warbling verse types showed a distinctively different structure

关键词： Phylloscopidae Phylogeography East–west divide Territorial songs Phylloscopus pulcher vegetus

Modeling hydraulic fracture in heterogeneous rock materials using permeability-based hydraulic fracture model

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Underground Space 2020年第2期5卷 167-183页

作者： Ming Li Peijun Guo dieter F.E.Stolle Li Liang Yitao Shi Department of Civil Engineering Northeastern UniversityBox 265 N3-11Wenhua RoadHeping DistrictShenyang 110819PR China Department of Civil Engineering McMaster University1280 Main Street WestHamiltonOntario L8S 4L8Canada

Hydraulic fracturing is one of the most important techniques for enhancing oil/gas *** permeability-based hydraulic fracture(PHF)model,which is based on the smeared-crack method and considers the interaction between the pore pressure and solid phase,is adopted in the present study for a fully-coupled simulation of the hydraulic fracture in a heterogeneous rock *** level set method(LSM),which is used to describe the distribution of material properties of heterogeneous rocks,is coupled with the PHF *** the coupled PHF–LSM model,a series of finite element method(FEM)simulations are carried out to investigate the characteristics of a hydraulic fracture(e.g.,the breakdown pressure and fracture propagation)in heterogeneous *** types of heterogeneous rocks are examined:layered rock,rock with distributed inclusions,and rock with random spatial variations in the material *** results of the numerical simulations show that the coupled PHF–LSM model can describe the material interface without changing the FEM mesh used to discretize the physical ***,the model effectively simulates hydraulic-fracturing problems for various heterogeneous rocks.

关键词： Hydraulic fracture Heterogeneous rock material Smeared-crack method Level set method

PET imaging in ischemic cerebrovascular disease:current status and future directions

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Neuroscience Bulletin 2014年第5期30卷 713-732页

作者： Wolf-dieter Heiss Max Planck Institute for Neurological Research

Cerebrovascular diseases are caused by interruption or significant impairment of the blood supply to the brain, which leads to a cascade of metabolic and molecular alterations resulting in functional disturbance and morphological damage. These pathophysiological changes can be assessed by positron emission tomography （PET）, which permits the regional measurement of physiological parameters and imaging of the distribution of molecular markers. PET has broadened our understanding of the flow and metabolic thresholds critical for the maintenance of brain function and morphology： in this application, PET has been essential in the transfer of the concept of the penumbra （tissue with perfusion below the functional threshold but above the threshold for the preservation of morphology） to clinical stroke and thereby has had great impact on developing treatment strategies. Radioligands for receptors can be used as early markers of irreversible neuronal damage and thereby can predict the size of the final infarcts; this is also important for decisions concerning invasive therapy in large （＂malignant＂） infarctions. With PET investigations, the reserve capacity of blood supply to the brain can be tested in obstructive arteriosclerosis of the supplying arteries, and this again is essential for planning interventions. The effect of a stroke on the surrounding and contralateral primarily unaffected tissue can be investigated, and these results help to understand the symptoms caused by disturbances in functional networks. Chronic cerebrovascular disease causes vascular cognitive disorders, including vascular dementia. PET permits the detection of the metabolic disturbances responsible for cognitive impairment and dementia, and can differentiate vascular dementia from degenerative diseases. It may also help to understand the importance of neuroinflammation after stroke and its interaction with amyloid deposition in the development of dementia. Although the clinical application of PET

关键词： stroke dementia PET brain metabolism brain ischemia

Colony contact contributes to the diversity of gut bacteria in bumblebees （Bombus terrestris）

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Insect Science 2017年第2期24卷 270-277页

作者： Annelies Billiet Ivan Meeus Filip Van Nieuwerburgh dieter Deforce Felix Wackers Guy Smagghe Laboratory of Agrozoology Department of Crop Protection Faculty of Bioscience Engineering Ghent University B-9000 Ghent Laboratory of Pharmaceutical Biotechnology Faculty of Pharmaceutical Sciences Ghent University B-9000 Ghent BiobestNV B-2260 Westerlo Belgium

Social bees, like honeybees and bumblebees, have a close contact with nest mates of different developmental stages and generations. This could enhance bacterial transfer between nest mates and offers opportunities for direct transfer of symbionts from one generation to the next, resulting in a stable host specific gut microbiota. Gut sym- bionts of honeybees and bumblebees have been suggested to contribute in digestion and protection against parasites and pathogens. Here we studied the impact of contact with the bumblebee colony on the colonization potential of the bacterial families （i.e., Neisseri- aceae, Orbaceae, Lactobacillaceae and Bifidobacteriaceae） occurring in the gut of adult bumblebees （Bombus terrestris）. Bacterial profiles of the gut microbiota of B. terrestris were determined based on the hypervariable V4 region of the 16S rRNA using paired-end Illumina sequencing. In our experiments, we created different groups in which we grad- ually reduced the contact with nest mates and hive material. We made 3 observations：（i） reducing the contact between the colony and the bumblebee during adult life resulted in a significant drop in the relative abundance ofLactobacillus bombicola and Lactobacillus bombi; （ii） Bifidobacteriaceae required contact with nest mates to colonize the gut of B. terrestris and a significant lower bacterial diversity was observed in bumblebees that were completely excluded from colony contact during the adult life; （iii） Snodgrassella and Gilliamella were able to colonize the gut of the adult bumblebee without any direct contact with nest mates in the adult life stage. These results indicate the impact of the colony life on the diversity of the characteristic bumblebee gut bacteria.

关键词： bacterial transfer bumblebee gut Illumina sequencing microbiota social

A different gut microbial community between larvae and adults of a wild bumblebee nest （Bombus pascuorum）

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Insect Science 2018年第1期25卷 66-74页

作者： Anneleen Parmentier Ivan Meeus Filip Van Nieuwerburgh dieter Deforce Peter Vandamme Guy Smagghe Laboratory of Agrozoology Department of Crop Protection Faculty of Bioscience Engineering Ghent University Laboratory of Pharmaceutical Biotechnology Faculty of Pharmaceutical Sciences Ghent University Laboratory of Microbiology Department of Biochemistryand Microbiology Faculty of Sciences Ghent University Ghent Belgium

Although the gut microbial communities in adult bumblebees and their as- sociated functionalities are widely studied, descriptive data on the larval gut microbiota are still limited. The gut microbiota of a fully sampled wild Bombus pascuorum nest has been characterized, using the multiplexed Illumina MiSeq 16S ribosomal RNA ampli- con sequencing technique. The nesters and foragers inhabiting the same nest showed the typical core bacterial sequences and only marginal differences in their characterized gut microbiota. The gut microbial communities within the adult and larval specimens differed strongly, as the typical core gut bacteria in the adult bumblebees are absent in the larval bumblebees. The bacterial communities within the larval gut are dominated by bacterial phylotypes of Enterobacteriaceae and Lactobacillaceae, supplemented with genera be- longing to Corynebacteriales and Bacillales. The function of this larval gut microbiota, being different from the adult, remains to be determined.

关键词： bumblebee gut Illumina sequencing larvae microbiota nest sample size

Robotic surgery and liver transplantation:A single-center experience of 501 robotic donor hepatectomies

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Hepatobiliary & Pancreatic Diseases International 2022年第4期21卷 334-339页

作者： Maren Schulze Yasser Elsheikh Markus Ulrich Boehnert Yasir Alnemary Saleh Alabbad dieter Clemens Broering Organ Transplant Center of Excellence King Faisal Specialist Hospital&Research CentreP.O.Box 3354Riyadh 11211Saudi Arabia

Background:Over the past two decades robotic surgery has been introduced to many areas including liver *** liver surgery is an alternative minimally invasive ***,moving on to the complexity of living donor hepatectomies,the advantages of robotic versus laparoscopic approach have convinced us to establish the robotic platform as a standard for living donor ***:From November 2018 to January 2022,501 fully robotic donor hepatectomies,including 177 left lateral donor lobes,112 full left lobes and 212 full right lobes were *** were donated to 296 adult recipients and 205 pediatric *** age,sex,body weight,body mass index(BMI),graft weight,graft to body weight ratio(GBWR),operative time,blood loss,first warm ischemic time,pain score,length of intensive care unit(ICU)stay and hospital stay,and complications were retrospectively analyzed based on a prospectively kept *** were evaluated for graft and patient survival,age,sex,BMI,body weight,model of end-stage liver disease score,blood loss,transfusions,operative time,cold ischemic time,length of hospital stay and ***:There was no donor *** cases needed to be converted to open *** median blood loss was 60 mL(range 20-800),median donor operative time was 6.77 h(range 2.93-11.53),median length of hospital stay was 4 days(range 2-22).Complication rate in donors classified following ClavienDindo was 6.4%(n=32)with one grade Ⅲ ***-year actual recipient overall survival was 91.4%;87.5% for adult recipients and 97.1% for pediatric ***-year actual graft overall survival was 90.6%;87.5% for adult recipients and 95.1% for pediatric ***-hospital mortality was 6%,9.1%(27/296)for adult recipients and 1.4%(3/205)for pediatric *** recipients’morbidity was 19.8%(n=99).Twenty-eight recipients(5.6%)had biliary and 22(4.4%)vascular ***(12.0%)recipients needed to

关键词： Living liver donor Innovation Robotic donor surgery Donor safety Minimally invasive donor surgery

Recent advances in hepatitis B virus research:A German point of view

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World Journal of Gastroenterology 2007年第1期13卷 8-13页

作者： dieter Glebe Institute of Medical Virology Justus-Liebig University of Giessen Giessen Germany

More than 30 years after the discovery of human hepatitis B virus （HBV） this virus remains to be one of the major global health problems. In infected adolescents or adults, 5%-10% will lead to a chronic carrier state, whereas in infected neonates up to 90% develop chronicity. It is estimated that about 370 million people are chronic carriers of HBV worldwide. In many regions of the world, chronic HBV infection is still the major cause of liver cirrhosis and hepatocellular carcinoma. During the last 30 years, many steps of the viral life cycle have been unravelled, mainly due to cloning, sequencing and expression of the genomic DNA extracted from HBV virions. This has lead to the development of a safe and efficient vaccine and sensitive tests for HBV surface prol^in （HBsAg） allowing reliable diagnosis and screening of blood products. More recently, a growing number of reverse transcriptase inhibitors have been developed. However, together with these improvements new defidencies in prevention and cure of HBV infections are becoming apparent. Although HBV is a DNA virus, it is highly variable under immunity or drug induced selection pressure, resulting in vaccine-related escape mutants and drug resistance. To overcome these challenging problems new antivirals and optimised vaccines have to be developed.

关键词： Hepatitis B virus Molecular biology Viral life cycle Animal system Antiviral therapy