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Intestinal protozoa and intestinal helminthic infections among schoolchildren in Central Sudan

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Asian Pacific Journal of Tropical medicine 2010年第4期3卷 292-293页

作者： Abdel-aziz m.Ahmed Azam A.Afifi Elfatih m.malik Ishag Adam University of Khartoum Sudan Preventive medicine Federal Ministry of HealthSudan

Objective:To determine the prevalence of intestinal parasitic infections and soil-transmitted helminths(STHs) among primary schoolchildren in El dhayga,Central ***:In this cross-sectional study,three fresh faecal samples were collected from each child,which were examined by direct wet mount,brine flotation,formalin-ether and Kato-Katz *** intensity of each STH infection was expressed as the mean of eggs per gram counts of the three ***:In total,142(90.4%) of 157 children harboured at least one type of intestinal *** lumbricoides,Hymenolepis nana,Entamoeba histolytica and Giardia lamblia were the most common parasites found,with prevalence rates of 32.5%,30.6%,33.1%and 19.7%,*** of these 157 children,29(18.5%) harboured more than two intestinal parasitic *** cases of Schistosoma mansoni or Enterobius vermicularis were identified. Conclusions:The study demonstrates significant burden of intestinal protozoa and STH infections in this part of Sudan and highlights the need for preventive and intervention measures.

关键词： Schoolchildern Helminthes Intestinal Protozoa Sudan

Environmental Exposure to Lead as a Risk for Prostate Cancer

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Biomedical and Environmental Sciences 2002年第4期15卷 298-305页

作者： m．K．J．SIDDIQUI S．SRIVASTAVA 等 IndustialToxicologyReserachCentre PostBoxNo.80.M.G.Marg.Lucknow226－001India Dr RMLAvadhUniversityFaizabad－224001India

Objective To evaluate the possible role of environmental exposure to lead as a risk factor for prostate pathology in patients suffering from prostate cancer (PCA) and benign prostate hyperplasia (BPH). methods Blood lead (BPb) level was determined in PCA and BPH cases using a graphite furnace Atomic Absorption Spectrophotometer and compared with those in a control group living in the similar socioeconomic environment. Results BPb was significantly higher in PCA and BPH cases than in normals (Pmpared with controls (Pmeasured as malondialdehyde, and negative correlation between blood lead and antioxidant GSH level, indicative of possible generation of reactive oxygen species, were also observed after adjusting for age as a possible confounders. However, positive association between blood lead and TEARS was relatively higher in PCA patients (r=0.77, Pmal (r=0.30, Pmited power seem to suggest for the first time that environmental exposure of aging males to lead may be a risk factor for prostate cancer and/or benign prostate hyperplasia possibly through generation of reactive oxygen species and/or reducing the level of zinc which acts as a cellular growth protector.

关键词： Benign prostate hyperplasia Prostate cancer Blood lead Atomic Absorption Spectrophotometer

Characterization of face-centered cubic structure and deformation mechanisms in high energy shot peening process of TC17

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Journal of materials Science & Technology 2022年第15期110卷 136-151页

作者： C.Yang m.Q.Li Y.G.Liu School of materials Science and Engineering Northwestern Polytechnical UniversityXi’an 710072China

The face-centered cubic structure(fcc)and its deformation behaviors,as well as the distinctive role of fcc-Ti in nanocrystallization in TC17 subjected to high energy shot peening(HESP),were investigated by using comprehensive high-resolution transmission electron microscopy(HRTEm).The results showed that there was a stress-induced fcc-Ti in TC17 with a lattice constant of 0.420–0.433 nm and the B-type orientation relationship between the hcp-Ti and the fcc-Ti as[2-1-10]_(hcp)//[-110]_(fcc)and(0001)_(hcp)//(111)_(fcc),which was accomplished by the gliding of Shockley partial dislocations with Burgers vector of 1/3[01-10]on the basal *** deformation twinning dominated the subsequent deformation of fcc-Ti,producing two types of{111}twins with different *** them,the I-type twin with complete structure was generated by successive gliding of Shockley partial dislocations with the same Burgers vector of 1/6[11-2].In contrast,the cooperative slip of three Shockley partials,whose sum of Burgers vectors was equal to zero,produced the II-type twin with zero net macroscopic *** then,the emission of Shockley partial with the Burgers vector of 1/6[11-2]on every three(111)fccplanes resulted in the formation of a 9R *** to the dissociation effect of lamellar fcc-Ti and the superior deformation ability of fcc structure,the occurrence of fcc-Ti effectively promoted surface nanocrystallization of TC17.

关键词： TC17 Severe plastic deformation Stress-induced phase transformation Deformation twinning Nanocrystallization

Seasonality in the occurrence of two lepidopterous olive pests in Egypt

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Insect Science 2011年第5期18卷 565-574页

作者： Esmat m. Hegazi maria A. Konstantopoulou Annette Herz Wedad E. Khafagi Essam Agamy Sania Showiel Atwa Atwa Gehan m. Abd EI-Aziz Safaa m. Abdel-Rahman Faculty of Agriculture University of Alexandria Egypt Chemical Ecology and Natural Products Laboratory NCSR ＂Demokritos Ag. Paraskevi Athens Greece Federal Biological Research Centre for Agriculture and Forestry Institute for Biological Control Darmstadt Germany Plant Protection Research Institute Sabahia Alexandria Egypt Faculty of Agriculture Cairo University Cairo Egypt Plant Protection Research Institute Cairo Egypt Central Laboratory of Pesticides Alexandria Egypt

Prays oleae Bern, （Om） andPalpita unionalis Hfib., （Jm） are two of the most important pests in olive groves in Egypt. A 3-year monitoring study using sex pheromone traps in semi-arid and arid olive groves was performed. In the semi-arid grove, flight pattern of the Om was the same as in other mediterranean countries, but in dates concordating plant phenology. The moth completes three generations annually： the first flight is in march to April, the second is in may to June and the third occurs in August to October. In the arid olive grove, an interesting flight pattern was observed. First flight was always very close or overlapped with the second one with no male catches during August to October. However, eggs were present most of the season, indicating unusually high female presence and oviposition activity of the Om during the absence of males in the traps. Generally, moth densities were significantly lower in low fruiting years than in higher ones and were also lower in the arid olive grove than in the semi-arid one. In contrast, Jm males were present all season, exhibiting six to seven and three to four overlapping flight peaks in arid and semi-arid olive groves, respectively. moth densities were significantly higher in the arid olive grove than those in the semi-arid one. This study shows that trapping location and fruit beating year are characteristics that strongly affect the grove-specific information needed to estimate correctly adult emergence and thus the timing of control measures.

关键词： egg-laying activity monitoring olive growing areas Palpita unionalis Prays oleae sex pheromone

Vascular endothelial growth factor：an essential neurotrophic factor for motoneurons？

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Neural Regeneration Research 2018年第7期13卷 1181-1182页

作者： Paula m.Calvo Angel m.Pastor Rosa R.de la Cruz Departamento de Fisiologia Facultad de Biologia Universidad de Sevilla Sevilla Spain

Vascular endothelial growth factor（VEGF）,an angiogenic factor with neuroprotective effects：The VEGF was initially characterized by its vasculogenic and angiogenic activities and its capacity to promote vascular permeability（Yancopoulos et al.,2000）.VEGF is also known as VEGF-A and is the prototype member of a related group of five trophic factors,VEGF-B,VEGF-C,VEGF-D and placental growth factor（Pl GF;Lange et al.,2016）.

关键词： VEGFR Vascular endothelial growth factor:an essential neurotrophic factor for motoneurons

Ionospheric precursors of strong earthquakes observed using six GNSS stations data during continuous five years(2011-2015)

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Geodesy and Geodynamics 2023年第1期14卷 65-79页

作者： H.E.Eshkuvatov B.J.Ahmedov Y.A.Tillayev m.Arslan Tariq m.Ali Shah Libo Liu Ulugh Beg Astronomical Institute Astronomy St.33Tashkent 100052Uzbekistan National University of Uzbekistan University St.4Tashkent 100174Uzbekistan Institute of Fundamental and Applied Research National Research University TIIAMEKori Niyoziy 39Tashkent 100000Uzbekistan Centre for Earthquake Studies National Centre for PhysicsIslamabadPakistan Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijingChina College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China Heilongjiang mohe Observatory of Geophysics Institute of Geology and GeophysicsChinese Academy of SciencesBeijingChina

This study reports the morphological characteristics of anomalous variations in Global Navigation Satellite System Total Electron Content(GNSS-TEC) prior to the strong local earthquakes(EQ) that occurred during the period of *** have analyzed 20 earthquakes of magnitude m> 5.6.A statistical technique is implemented on the data of six GNSS stations located in Tashkent,Kitab,and maidanak in Uzbekistan,and Islamabad,multan,Quetta in *** results show continuous anomalous variations in TEC during 24 h befo re the occupancy of local *** is shown that the precursors before the occurrence of strong earthquakes,in particular of magnitude 5.7,7.7,7.5,7.8 and 7.3 are detected near Eastern Uzbekistan(26 may 2013),Southwestern Pakistan(24 September 2013),Hindukush region of Afghanistan(26 October 2015),and Central Nepal(25 April 2015) and(12 may 2015),*** ionospheric anomalies appearing before the strong earthquakes at six GNSS stations are registered in 14cases(70%) out of 20 selected *** is depicted that anomalies referred to as ionospheric precursors appeared about 1-7 days prior to the occurrence of strong earthquakes.

关键词： GNSS TEC Earthquakes Ionospheric precursors

A European perspective on Digital Earth

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International Journal of Digital Earth 2011年第4期4卷 271-284页

作者： AAnnoni m.Craglia m.Ehlers Y.Georgiadou A.Giacomelli m.Konecny N.Ostlaender G.Remetey-Fulopp D.Rhind P.Smits S.Schade European Commission Joint Research CentreIspraItaly Institute for Geoinformatics and Remote Sensing University of OsnabrueckOsnabrueckGermany Faculty for Geo-information Sciences and Earth Observation University of TwenteEnschedeThe Netherlands Pibinko MilanItaly Department of Geography Masaryk UniversityBrnoCzech Republic Hungarian Association for Geo-information BudapestHungary Portsmouth Hospitals NHS Trust PortsmouthUK

The purpose of this paper is to contribute to the definition of a European perspective on Digital Earth(DE),identify some actions that can contribute to raise the awareness of DE in the European context and thus strengthen the European contribution to the International Society for Digital Earth(ISDE).The paper identifies opportunities and synergies with the current policy priorities in Europe(Europe 2020,Innovation Union and Digital Agenda)and highlights a number of key areas to advance the development of DE from a European perspective:(1)integrating scientific research into DE;(2)exploiting the Observation Web with human-centred sensing;and(3)governance,including the establishment of stronger linkages across the European landscape of funding streams and *** paper is offered also as a contribution to the development of this new vision of DE to be presented at the next International DE Conference in Perth,Australia,in August *** global recognition of this new vision will then reinforce the European component and build a positive feedback loop for the further implementation of DE across the globe.

关键词： Digital Earth Europe Observation Web volunteered geographic information

maternal body condition during latepregnancy is associated with in utero development and neonatal growth of Holstein calves

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Journal of Animal Science and Biotechnology 2021年第3期12卷 984-994页

作者： A.S.Alharthi D.N.Coleman I.A.Alhidary m.m.Abdelrahman E.Trevisi J.J.Loor Department of Animal Production College of Food and Agriculture SciencesKing Saud UniversityRiyadh 11451Saudi Arabia Department of Animal Sciences and Division of Nutritional Sciences University of IllinoisUrbanaIL 61801USA Department of Animal Sciences Food and Nutrition(DIANA)Faculty of AgricultureFood and Environmental ScienceUniversitàCattolica del Sacro Cuore29122 PiacenzaItaly

Background:Nutritional management in the dry period can alter body condition score(BCS)in dairy cows,a subjective measure of body *** such,differences in BCS during late-pregnancy not only mirror nutrient utilization by fat depots,but also can play important roles on the metabolic and hormonal *** investigated the association between cow BCS during late-pregnancy on developmental parameters and blood variables of neonatal ***-nine multiparous Holstein cows were retrospectively divided by prepartal BCS into normal BCS≤3.25(NormBCS;3.02±0.17,n=30)or high BCS≥3.75(HighBCS;3.83±0.15,n=19)*** samples were collected from cows at−10 d relative to *** weight,hip and wither height,hip width and body length were measured at birth and weekly through weaning(42 d of age)and until 9 weeks of *** blood samples were collected from the jugular vein at birth(before receiving colostrum,0 d),24 h after first colostrum and at 7,21,42 and 50 d of *** data were subjected to ANOVA using the mixed procedure of *** statistical model included day,BCS,and their ***:Dry matter intake(kg/d or%of body weight)during the last 4 weeks of pregnancy was lower(P≤0.06)in HighBCS *** concentrations of fatty acids,ceruloplasmin,and nitric oxide were greater overall(Pms with *** addition,plasma concentrations of fatty acids,albumin and urea(Pmaintained a lower postnatal body weight(P=0.04),hip and wither height,hip width,and body length,there was no difference(P>0.05)in daily starter intake and average daily gain due to maternal ***:Overall,results highlight an association between BCS during late-gestation on in utero calf development and postna

关键词： metabolism Neonate Nutritional programming Transition cow

Asphaltene Surface Erosion in Air Plasma

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Plasma Science and Technology 2010年第1期12卷 81-86页

作者： m. VILLA m. CALIXTO-RODRIGUEZ H. mARTINEZ J. C. POVEDA P. G. REYES P. ALTUZAR Faculty of Sciences Autonomous University of the State of Mexico State of Mexico Mexico Institute of Physical Sciences Autonomous National University of Mexico 62210 Cuernavaca Morelos Mexico Energy Research Center Autonomous National University of Mexico 62580 Temixco Morelos Mexico

Optical emission spectroscopy was applied for plasma characterization during erosion of substrates of asphaltene. The amount of 100 mg of asphaltene was carefully applied to an electrode and exposed to air plasma glow discharge at a pressure of 1.0 Tort. The plasma was generated in a stainless steel discharge chamber by an AC generator with a frequency of 60 Hz and an output power of about 60 W. The electron temperature was found to be 6.88 eV, and the ion density is about 3.5×10^16 cm^-3. As the asphaltene was exposed to the air plasma, the surface was etched. The emission from molecular bands CS2,O3, N2^＋, NO, O2, CS, S2, CN, C7H7, C2, H2, C2^-, NiO, N2 and SO, and atomic line O, were observed and some of them were used to monitor the evolution of asphaltene erosion. The asphaltene weight was reduced gradually with an etching rate of about 0.844 mg/min, during the first 20 min.

关键词： optical emission spectroscopy asphaltene erosion