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固定化Brucella sp. GXY-1降解苯酚的特性及其动力学研究

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辽宁师范大学学报（自然科学版） 2008年第3期31卷 343-346页

作者：周集体 m. salah uddin 关晓燕曲媛媛大连理工大学环境与生命学院辽宁大连116024 辽宁省海洋水产科学研究院辽宁省应用海洋生物实验室辽宁大连116023

利用大孔网状载体固定苯酚降解菌——布鲁氏杆菌(Brucella sp.)GXY-1菌株,并对固定化菌的制备条件及固定化菌降解苯酚的特性进行考察.结果表明,固定化菌株的最适温度为25～35℃,最适pH为7.0左右,摇床转速为150r/min,最大耐盐度为2%,比... 详细信息

利用大孔网状载体固定苯酚降解菌——布鲁氏杆菌(Brucella sp.)GXY-1菌株,并对固定化菌的制备条件及固定化菌降解苯酚的特性进行考察.结果表明,固定化菌株的最适温度为25～35℃,最适pH为7.0左右,摇床转速为150r/min,最大耐盐度为2%,比游离态菌株更能适应环境变化.固定化菌降解苯酚的速率明显高于游离菌,降解过程符合Andrews抑制模型,确定了模型参数:qmax=2.932h-1,Ks=286.227mg/L,Ki=97.720mg/L.

关键词：苯酚降解固定化布鲁氏杆菌动力学

Vanillylacetone attenuates cadmium chloride-induced hippocampal damage and memory loss through upregulation of nuclear factor erythroid 2-related factor 2 gene and protein expression

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Neural Regeneration Research 2024年第12期19卷 2750-2759页

作者： Fahaid H.A.L-Hashem.salah O.Bashir Amal F.Dawood moutasem S.Aboonq Ismaeel Bin-Jaliah Abdulaiziz m.Al-Garni mohamed D.morsy Department of Physiology College of MedicineKing Khalid UniversityAbhaSaudi Arabia Department of Basic medical Sciences College of MedicinePrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh 11671Saudi Arabia Department of Physiology College of MedicineTaibah UniversityAl-Madinah Al-MunawwarahSaudi Arabia Department of medicine College of MedicineKing Khalid UniversityAbhaSaudi Arabia

memory loss and dementia are major public health concerns with a substantial economic *** stress has been shown to play a crucial role in the pathophysiology of hippocampal damage-induced memory *** investigate whether the antioxidant and anti-inflammatory compound vanillyla cetone(zingerone) can protect against hippocampal damage and memory loss induced by cadmium chloride(CdCl_(2)) administration in rats,we explo red the potential involvement of the nuclear factor erythroid 2-related factor 2(Nrf2) signaling pathway,which is known to modulate oxidative stress and *** healt hy male Wistar rats were divided into five groups:vehicle-treated(control),vanillylacetone,CdCl_(2),vanillylacetone+ CdCl_(2),vanillylacetone+ CdCl_(2)+ brusatol(a selective pharmacological N rf2inhibitor) *** effectively attenuated CdCl_(2)-induced damage in the dental gyrus of the hippocampus and improved the memory function assessed by the morris Water maze ***,vanillylacetone markedly decreased the hippocampal tissue levels of inflammatory biomarkers(interleukin-6,tumor necrosis factor-α,intracellular cell adhesive molecules) and apoptosis biomarkers(Bax and cleaved caspase-3).The control and CdCl_(2)-treated groups treated with va nillylacetone showed reduced generation of reactive oxygen species,decreased malondialdehyde levels,and increased superoxide dismutase and glutathione activities,along with significant elevation of nuclear Nrf2 mRNA and protein expression in hippocampal *** the protective effects of vanillylacetone we re substantially blocked by the co-administration of brusatol(a selective N rf2 inhibitor).Va nillylacetone mitigated hippocampal damage and memory loss induced by CdCl_(2),at least in part, by activating the nuclear transcription factor ***,vanillylacetone exerted its potent antioxidant and antiinflammatory actions.

关键词： hippocampus neuroprotective Nrf2 gene oxidative stress vanillylacetone

Influence of Sanitization Process on maintaining Sweet Potato Quality for Export

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Journal of Agricultural Science and Technology(A) 2024年第1期14卷 31-37页

作者： Saneya m.El Neshawy Tharwa m.Elkholi salah H.Hegazy Department of Post-harvest Diseases Plant Pathology Research InstituteAgricultural Research Center(ARC)Giza 12619Egypt Central Administration for medical Services Ministry of AgricultureDokii 12611Egypt General manager of AgroFood Company Limited Dokii 12611Egypt

The whole cold-chain for exporting sweet potato(native variety“Abees”),to foreign market included immediate curing operation directly after harvest helped in healing skin texture,however,in order to reduce postharvest soft rot(Rhizopus stolonifer)incidence following trimming,and washing,ultraviolet light(UV-C)treatment was used as a main sanitizer for eliminating the soft *** of the roots to UV-C(254 nm)was applied in a UV-C room on freshly harvested and cured sweet potato while rolling up on a movable line at 20 cm distance for 1,2,and 3 *** combining UV-C treatment with chlorine(200 ppm)on roots,marked and significant reduction of the total microbial load and Rhizopus potential was achieved on root surfaces respectively compared with chlorine *** also reduced soft rot percentage to almost 0%*** 3 months of cold-storage,quality assessment of sweet potato showed that root characteristics were markedly *** ability of UV-C light to induce phenylalanine ammonia lyase(PAL)enzyme activity in root tissue and maintain the activities of peroxidase and polyphenol oxidase,however with slight increase,was ***-C caused an increase of phenol content in sweet potato tissue that made an activation of defense reaction against the rot causal *** the exposure time to UV-C light increased,a higher content of phenols ***,UV-C application caused decrease in sugar content of root tissue that is flavored by soft rot-causal pathogen.

关键词： Sweet potato(Ipomoea batatas) soft rot Rhizopus stolonifer UV-C light cold storage microbial load

Ultralong hydroxyapatite-based forward osmosis membrane for freshwater generation

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Frontiers of Chemical Science and Engineering 2024年第9期18卷 37-49页

作者： mohamed Gamal Gomaa Hamdy maamoun Abdel-Ghafar Francesco Galiano Francesca Russo Alberto Figoli El-Sayed Ali Abdel-Aal Abdel-Hakim Taha Kandil Bahaa Ahmed salah Central metallurgical Research and Development Institute(CmRDI) 11421 CairoEgypt Chemistry Department Faculty of ScienceHelwan University11795 CairoEgypt Institute on membrane Technology(CNR-ITm) 87036 RendeItaly

Increasing global water shortages are accelerating the pace of membrane manufacturing,which generates many environmentally harmful *** challenges need a radical rethink of developing innovative membranes that can address freshwater production without generating environmentally harmful *** work utilized the synthesized ultra-long hydroxyapatite(UHA)by the solvothermal method using the green solvent oleic acid in preparing UHA-based forward osmosis *** membranes were developed using different loading ratios of graphene oxide(GO)by vacuum-assisted filtration *** prepared GO/UHA membranes were identified using X-ray diffraction,scanning electron microscope,Fourier-transform infrared spectroscopy,and X-ray photoelectron *** contact angle and pore size distribution were determined for the obtained GO/UHA *** obtained hierarchical porous structure in the prepared membranes with interconnected channels results in a stable water flux with reverse salt *** best water flux rate of 42±2 L·m^(–2)·h^(–1)was achieved using the 50 mg GO/UHA membrane,which is 3.3 times higher than the pristine membrane,and a reverse salt flux of 67 g·m^(-2)·h^(–1).The obtained results showed a promising capability of a new generation of sustainable inorganic-based membranes that can be utilized in freshwater generation by energy-efficient techniques such as forward osmosis.

关键词： forward osmosis ultra-long hydroxyapatite graphene oxide inorganic-based membrane

A Proposed Design, Implementation and Control of Doubly Fed Switched Reluctance motor

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CES Transactions on Electrical machines and Systems 2019年第1期3卷 101-106页

作者： Eid Gouda m.salah H. the Electrical Engineering Department Faculty of EngineeringMansoura University35516Egypt

In this paper,rotor of switched reluctance motor(SRm)is employed by mounting copper windings on the rotor poles as well as the stator *** and stator windings are excited from DC supply in order to increase the developed electro-magnetic torque;thus enhancing the output power of the drive and keeping the system ***,the proposed SRm offers higher reliability than conventional one,if excitation of rotor windings is lost,the drive will turn into a conventional SRm,the drive will continue running as a conventional *** element method magnetics(FEmm)software is applied to obtain the magnetic characteristics of the proposed SRm.A control strategy for excitation of rotor and stator windings is ***/Simulink modeling of the proposed SRm is given and validated by practical *** Results on a prototype show that the proposed SRm is capable of achieving an increased torque compared with conventional SRm drive.

关键词： Doubly Fed SRm SRm Control Wounded Rotor.

Evaluation of hybrid closed-loop insulin delivery system in type 1 diabetes in real-world clinical practice:One-year observational study

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World Journal of Diabetes 2024年第3期15卷 455-462页

作者： Ahmed Eldib Shilton Dhaver Karim Kibaa Astrid Atakov-Castillo Tareq salah marwa Al-Badri Abdelrahman Khater Ryan mcCarragher Omnia Elenani Elena Toschi Osama Hamdy Department of Clinical Behavioral&Outcomes ResearchJoslin Diabetes CenterBostonMA 02215United States Department of medicine Harvard Medical SchoolBostonMA 02115United States

BACKGROUND In 2016,the Food and Drug Administration approved the first hybrid closed-loop(HCL)insulin delivery system for adults with type 1 diabetes(T1D).There is limited information on the impact of using HCL systems on patient-reported outcomes(PROs)in patients with T1D in real-world clinical *** this independent study,we evaluated glycemic parameters and PROs over one year of continuous use of medtronic’s 670G HCL in real-world clinical *** To assess the effects of hybrid closed loop system on glycemic control and quality of life in adults with *** We evaluated 71 patients with T1D(mean age:45.5±12.1 years;59%females;body weight:83.8±18.7 kg,body mass index:28.7±5.6 kg/m2,A1C:7.6%±0.8%)who were treated with HCL at Joslin Clinic from 2017 to *** measured A1C and percent of glucose time-in-range(%TIR)at baseline and 12 *** measured percent time in auto mode(%TiAm)for the last two weeks preceding the final visit and assessed PROs through several validated quality-of-life surveys related to general health and diabetes *** At 12 mo,A1C decreased by 0.3%±0.1%(P=0.001)and%TIR increased by 8.1%±2.5%(P=0.002).The average%TiAm was only 64.3%±32.8%and was not associated with A1C,%TIR or ***,provided at baseline and at the end of the study,showed that the physical functioning submodule of 36Item Short-Form Health Survey increased significantly by 22.9%(Pmia fear survey/worry scale decreased significantly by 24.9%(Pm Areas In Diabetes reduced significantly by-17.2%(P=0.002).The emotional burden submodules of dietary diversity score reduced significantly by-44.7%(P=0.001).Furthermore,analysis of Clarke questionnaire showed no increase in awareness of hypoglycemic ***-5 showed no improvements in subject’s wellbeing among participants after starting the 670G HCL ***,analysis of Pittsburgh Sleep Quality Index showed no difference in sleep quality,sleep latency,or duration o

关键词： Artificial pancreas Continuous blood glucose monitor Type 1 diabetes Hybrid closed-loop insulin delivery Quality of life

The Effect of Atrial Septal Defect Closure on Cardiac Volumetric Changes in Adults, Transcatheter Versus Surgical Closure, a Pilot Cardiac magnetic Resonance Study

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Congenital Heart Disease 2023年第6期18卷 679-691页

作者： Amr mansour Noha m.Gamal Alaa m.Nady Amr Ibraheem Dalia m.salah Khaled m.El-maghraby Cardiology Department Congenital and Structural Heart Disease UnitAin Shams University HospitalsFaculty of MedicineAin Shams UniversityCairoEgypt Cardiology Department Faculty of MedicineAssuit UniversityAssuitEgypt Cardiothoracic Surgery Department Faculty of MedicineAssuit UniversityAssuitEgypt Anesthesia Department Faculty of MedicineAssuit UniversityAssuitEgypt

Background:Closure of an atrial septal defect(ASD)reduces right-side heart volumes by abolishing shunting with simultaneous improvement of the left ventricle(LV)ﬁlling and functions due to ventricular interdependence,thereby improving ***,studies conducted on atrial volume changes after ASD closure are *** magnetic resonance(CmR)is considered as the gold standard method for measuring cardiac volume and ***:We aimed to study the effect of transcatheter and surgical closure of secundum ASD on cardiac volumes and systolic functions as well as the fate of tricuspid regurgitation(TR),using CmR ***:We prospectively enrolled 30 adult patients with isolated secundum ASD who were referred to ASD *** evaluation of cardiac chambers indexed volumes,systolic function,myocardial mass index,and tricuspid regurgitant fraction were done at before and 6 months after ***:RV volumes decreased in both groups when compared to baseline(p-value 0.001),the device group had more reduction in volumes and more improvement in RV function after closure(p-value 0.001)when compared to the surgical *** changes in the RV mass index were insigniﬁcant between both groups(p-value 0.31).Functional TR improved to the same extent in both *** ventricular end diastolic volume index(LVEDVI)and LV mass index increased sig-niﬁcantly in both groups when compared to baseline in both groups but with no difference between groups p-value 0.01),left ventricular end systolic volume index(LVESVI)changes were insigniﬁ*** systolic function improved in patients who underwent device closure only(63.53±3.85 vs.67.13±4.34,p-value 0.01).There was a signiﬁcant reduction in right atrial(RA)volumes and an insigniﬁcant decrease in left atrial(LA)volumes,with no difference between ***:Transcatheter and surgical secundum ASD closure resulted in volumetric changes in some cardiac chambers with better improvement in bi-ventricular

关键词： Atrial septal defect closure cardiac volumetric changes functional tricuspid regurgitation cardiac CmR

微旋转切向双曲混合流体中悬浮混合纳米粒子的流变学

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Journal of Central South University 2023年第4期30卷 1231-1245页

作者： m.N.ABRAR salah uddin Kamran AKHTAR Department of Civil Engineering National University of Sciences and TechnologyBalochistan Campus QuettaQuetta 86000Pakistan National University of Sciences and Technology Islamabad 44000Pakistan

流体运动通过线性拉伸片而实现。本研究结合多种流动和热现象,如多孔介质、倾斜磁流体、焦耳热以及速度和热滑移因子,用数值方法研究了切向双曲混合纳米流体通过多孔薄片的微旋转效应。得到的数学公式是一组非线性耦合偏微分方程。为了... 详细信息

流体运动通过线性拉伸片而实现。本研究结合多种流动和热现象,如多孔介质、倾斜磁流体、焦耳热以及速度和热滑移因子,用数值方法研究了切向双曲混合纳米流体通过多孔薄片的微旋转效应。得到的数学公式是一组非线性耦合偏微分方程。为了得到近似解,引入了相似性变量。利用Runge-Kutta-Fehlberg 45 (RKF-45)和射门技术,得到主导微分方程的数值解。用图示法表示相关参数的物理意义。为了验证数值结果,与已经发表的数据进行比较。假设流体的流速随Weissenberg数和渗透率的增加而减小,流体的角速度随表面条件参数的增加而明显著加快。表面摩擦因数随Weissenberg数的增加而有效减小,随大的速度滑移参数的增大而增大。结果证实,较高的银和铜纳米颗粒体积分数具有提高流动流体导热率的潜力。混合纳米流体可广泛应用在工程中,比如核冷却、海水淡化、机加工、制冷、热交换器、太阳能集热器和发动机冷却等。此外,在微旋转切向双曲流体中混入纳米流体可提高系统的热能力,可将其应用于依赖热传递的机械系统。

关键词：微极性流体混合纳米流体切向双曲流体多孔介质滑移因子倾斜磁流体

Volatility spillovers,structural breaks and uncertainty in technology sector markets

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Financial Innovation 2023年第1期9卷 2908-2938页

作者： Linn Arnell Emma Engström Gazi salah uddin mdBokhtiar Hasan Sang Hoon Kang Landshypotek Bank StockholmSweden Department of management and Engineering Linköping UniversityLinköpingSweden Department of Finance and Banking Islamic UniversityKushtia 7003Bangladesh School of Business Pusan National UniversityBusanRepublic of Korea

This study uses the dynamic conditional correlation to investigate how technology subsector stocks interact with financial assets in the face of economic and financial *** results suggest that structural breaks have diverse effects on financial asset connectedness and that the level of bond linkage increases when the trend *** see a growing co-movement between the technology sector and major financial assets when uncertainty is ***,our findings indicate that the connectedness response varies depending on the type of uncertainty shock.

关键词： Technology sector Diversification Dynamic conditional correlation Uncertainty Structural breaks