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NUCLEAR MAGNETIC RESONANCE STUDIES OF METAL COMPLEXES WITH ETHYLENEDIAMINE-N,N′-DIACETATE-N,N′-DI-β-PROPIONATE

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Journal of Rare Earths 1990年第4期8卷 246-251页

作者：牛春吉 E.N.rizkalla G.R.Choppin Changchun Institute of Applled Chemistry Academia SinicaChangchun 130022China Department of Chemistry the Florida State University

The complexes of metals(Mg,Ca,Sr,Ba,La,Y and Lu)with ethylenediamine-N,N′-diacetate-N, N′-di-β-propionate have been studied by proton nuclear magnetic resonance(PMR).The interesting quartet spectral pattern of acetate protons and multiplet spectral pattern of protons of propionate groups for the complexes of metal ions of high charge density have been *** results show that the chemical bond for these complexes is predominantly ionic and the lability of metal-nitrogen bond as well as metal- oxygen bond decreases with increasing charge density of cations.

关键词： Pro PROPIONATE DI DIACETATE-N,N NUCLEAR MAGNETIC RESONANCE STUDIES OF METAL COMPLEXES WITH ETHYLENEDIAMINE-N,N

Thermoelastic rotating contact of an FGM coating with temperature-dependent and arbitrary varying properties

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Science China(Technological Sciences) 2023年第4期66卷 1038-1049页

作者： ZHOU JiaLin SHEN Fei LIU Jing EL-BORGI sami KE LiaoLiang Department of Mechanics School of Mechanical EngineeringTianjin UniversityTianjin 300350China College of Engineering Huazhong Agricultural UniversityWuhan 430070Chin Mechanical Engineering Program Engineering BuildingTexas A&M University at QatarP.O.Box 23874Qatar

This paper investigates the frictional thermoelastic contact of a rigid spherical punch and functionally graded material(FGM)coated half-space with arbitrarily varying material *** material parameters include the elastic modulus,Poisson’s ratio,heat conduction parameter,and thermal expansion *** material parameters of the FGM coating and half-space are assumed to be temperature *** spherical punch is rotated in the FGM-coated half-space at a constant angular *** generated frictional heat is related to the friction coefficient,contact radius,angular velocity,and contact pressure.A theoretical formula for the thermoelastic rotating contact problem is established and solved using the finite element *** main objective of this paper is to investigate the effects of temperature dependence,gradient index,friction coefficient,angular velocity,and gradient form on the surface temperature and stresses.

关键词： rotating punch frictional heat functionally graded materials temperature dependence arbitrary properties

Real-time air pollution monitoring with sensors on city bus

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Digital Communications and Networks 2020年第1期6卷 23-30页

作者： sami Kaivonen Edith C.-H.Ngai Department of Information Technology Uppsala UniversitySweden

This paper presents an experimental study on real-time air pollution monitoring using wireless sensors on public transport *** study is part of the GreenIoT project in Sweden,which utilizes Internet-of-Things to measure air pollution level in the city center of *** deploying low-cost wireless sensors,it is possible to obtain more fine-grained and real-time air pollution levels at different *** sensors on public transport vehicles complement the readings from stationary sensors and the only ground level monitoring station in *** paper describes the deployment of wireless sensors on Uppsala buses and the integration of the mobile sensor network with the GreenIoT *** experiments have been conducted to evaluate the communication quality and data quality of the system.

关键词： Smart city Internet-of-Things Mobile sensor network Air pollution monitoring

Intraperitoneal rupture of the hydatid cyst: Four case reports and literature review

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World Journal of Hepatology 2019年第3期11卷 318-329页

作者： sami Akbulut Fatih Ozdemir Department of Surgery and Liver Transplant Institute Inonu University Faculty of Medicine

BACKGROUND Most patients with hydatid cysts are asymptomatic, and they are diagnosed incidentally during radiological evaluations performed for other ***, some patients develop symptoms and complications due to cyst size,location, and the relationship between the cyst and adjacent structures. The most serious complications that can occur are rupture of the cysts into the biliary tract,vascular structures, hollow viscus, and peritoneal cavity. We aimed to describe the management of four cases of intraperitoneal rupture of hydatid *** SUMMARIES Four patients aged between 27 and 44 years(two men and two women) were admitted to our clinic with sudden abdominal pain(n = 4), hypotension(n = 3),and anaphylaxis(n = 2). Three of the perforated cysts were located in the liver,and one was located in the spleen. Two patients developed cyst rupture after minor trauma, and the other two developed spontaneous rupture. Enzymelinked immunosorbent assay IgG results were positive for two patients and negative for the other two. All patients received albendazole treatment after surgical intervention(range: 2-6 mo). Two patients developed hepatic abscesses requiring drainage; one of these patients also developed hydatid cyst recurrence during postoperative follow-up(range: 25-80 mo).CONCLUSION Intraperitoneal rupture is a life-threatening complication of hydatid cysts. It is important to manage patients with surgical intervention as soon as possible with aggressive medical treatment for anaphylactic reactions.

关键词： Hydatid cyst Complication Inraperitoneal rupture Spontaneous rupture Traumatic rupture Anaphylactic reactions Case report

Quantitative estimation of dust fall and smoke particles in Quetta Valley

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2006年第7期7卷 542-547页

作者： sami Muhammad WASEEM Amir AKBAR Sher Department of Chemistry University of Balochistan Quetta 87300 Pakistan

Tightening of air quality standards for populated urban areas has led to increasing attention to assessment of air quality management areas, where violation of air quality standards occurs, and development of control strategies to eliminate such vio-lation of air quality standards. The Quetta urban area is very densely built and has heavy motorized traffic. The increase of emis-sions mainly from traffic and industry are responsible for the increase in atmospheric pollution levels during the last years. The dust examined in the current study was collected by both deposit gauge and Petri dish methods at various sites of Quetta Valley. Smoke particles were obtained by bladder method from the exhausts of various types of motor vehicles. The concentration of lead found in the smoke ranged from 1.5×10?6 to 4.5×10?6.

关键词： Particulate matter (PM) Dust fall Smoke Lead Gasoline

Modification of Assessment Method of Pulmonary Vascular Permeability and Its Application

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Chinese Science Bulletin 1994年第9期39卷 778-784页

作者：林耀广 sami I Said Peking Union Medical College Hospital Beijing 100730 PRC University of Illinois ChicagoU.S.A.

Pulmonary vascular permeability change is a very important pathophysiologicalabnormality and a basis of pulmonary edema in acute diseases of lung and ***, the measurement of pulmonary vascular permeability is a major approachto the assessment of lung injury. The change of pulmonary vascular permeability isusually estimated by determination of lung water (e.g. wet-to-dry lung weight ratio)

关键词： pulmonary vascular permeability albumin leak index wet-to-dry lung weight ratio vasoactive intestinal peptides.

Identification of novel catalytic features of endo-β-1,4-glucanase produced by mulberry longicorn beetle Apriona germari

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2007年第10期8卷 765-770页

作者： sami Amtul Jamil HAIDER Mohammed Kamran Institute of Biochemistry and Biotechnology University of the Punjab Lahore 54594 Pakistan

Mulberry longicorn beetle, Apriona germari, has been reported to produce two endo-β-1,4-glucanases or AgEGases (accession Nos. Q6SS52 and Q5XQD1). AgEGase sequence contains catalytic motif (amino acid residues 37~48), which is the characteristic of family Glycohydrolase 45 and is identified as the substrate binding site. The application of bioinformatics ap-proaches includes sequence analysis, structural modeling and inhibitor docking to relate the structure and function of AgEGases. We have dissected the sequence and structure of AgEGase catalytic motif and compared it with crystal structure of Humicola insolens endoglucanases V. The results show an involvement of sulfur containing amino acid residues in the active site of the enzyme. Cys residues and position of disulfide bonds are highly conserved between the two structures of endoglucanases of A. germari. Surface calculation of AgEGase structure in the absence of Cys residues reveals greater accessibility of the catalytic site to the substrate involving Asp42, a highly conserved residue. For the inhibition study, tannin-based structure was docked into the catalytic site of AgEGase using ArgusLab 4.0 and it resulted in a stable complex formation. It is suggested that the inhibition could occur through formation of a stable transition state analog-enzyme complex with the tannin-based inhibitor, as observed with other insect cellulases in our laboratory.

关键词： Cellulases AgEGase Apriona germari Inhibition Anthocyanidins

Comment on pediatric living donor liver transplantation decade progress in Shanghai: Characteristics and risks factors of mortality

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World Journal of Gastroenterology 2020年第30期26卷 4564-4566页

作者： sami Akbulut Tevfik Tolga Sahin Sezai Yilmaz Deaprtment of Surgery and Liver Transplant Institute Inonu University Faculty of MedicineMalatya 44280Turkey

Since the first successful liver transplantation was performed five decades ago,pediatric liver transplantation has become the gold standard treatment choice for pediatric liver disease,including metabolic diseases,liver tumors,and some acute liver *** improvements in immunosuppression,surgical techniques,and postoperative medical care,long-term outcomes of patients after liver transplantation have markedly improved,especially in pediatric patients.

关键词： Pediatric end stage liver disease Living donor pediatric liver transplantation Survival analysis Risk factors Living donor liver transplantation Outcomes

Scour hole reduction at a diversion channel junction using different entrance edge shapes

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International Journal of Sediment Research 2023年第6期38卷 811-820页

作者： Ahmed Yahya Abdulhafedh Nashwan Kamalaldeen Alomari Ahmed Mohammed sami Al-Janabi Department of Dams and Water Resources Engineering College of Engineering University of Mosul Department of Civil Engineering Cihan University-Erbil

In the current study,the effect of the entrance edge shape on the scour hole in the diversion junction region was experimentally *** investigation has considered three entrance modelsrounded edge shapes on one or both sides of the diversion channel entrance-with five different inlet edge radius ratios(rr) of 25%,37.5%,50%,62.5%,and 75% and five different diversion discharge ratios(Qr)of 7.5%,12.5%,17.5%,22.5%,and 30%.The results have found the direct relation between Qrand the scour depth to the diversion channel water depth ratio(ds/yb).Moreover,the use of a rounded edge shape on one or both sides of the diversion channel entrance instead of a sharp shape results in a reduction in scour depth to diversion channel water depth ratio(ds/yb) when the Qris greater than 20%.The results also indicated that the largest decrease in the scour coefficient(Kds) for the model with a rounded downstream edge compared with the sharp edge diversion channel entrance shape was 22% at a discharge ratio of 22.5% and an edge radius ratio of 37.5%.In addition,the entrance shape model with a rounded edge at the upstream outperformed other models in scour reduction with an average of all experiments of 5.77%.Finally,empirical relations for estimating scour depth for different rounded edge models in terms of the effective dimensionless parameters were established with coefficients of determination(R2) of not less than 0.853.

关键词： Open channel Diversion flow Entrance edge shape Scour Channel junctions