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| 1 | Advances in fabrication of ceramic corundum abrasives based on sol–gel process显示文摘Corundum abrasives with good chemical stability can be fabricated into various free abrasives and bonded abrasive tools that are widely used in the precision machining of various parts.However,these abrasives cannot satisfy the machining requirements of difficult-to-machine materials with high hardness,high strength,and strong wearing resistance.Although superhard abrasives can machine the above-mentioned materials,their dressing and manufacturing costs are high.By contrast,ceramic corundum abrasives fabricated by sol–gel method is a costeffective product between conventional and superhard abrasives.Ceramic corundum abrasives exhibit self-sharpening and high toughness.In this review,the optimization methods of ceramic corundum abrasive properties are introduced from three aspects:precursor synthesis,particle shaping,and sintering.Firstly,the functional mechanism of seeds and additives on the microstructural and mechanical properties of abrasives is analyzed.Specifically,seeds can reduce the phase transition temperature and improve fracture toughness.The grain size and uniformly dense structure can be controlled by applying an appropriate amount of multicomponent additives.Then,the urgent need of engineering application and machinability of special shape ceramic corundum abrasives is reviewed,and three methods of abrasive shaping are summarized.The micromold replication technique is highly advanced and can be used to prepare functional abrasives.Additionally,the influence of a new sintering method,namely,two-step sintering technique,on the microstructural and mechanical performance of ceramic corundum abrasives is summarized.Finally,the challenge and developmental trend of the optimization of ceramic corundum abrasives are prospected. | Baoteng HUANG Changhe LI Yanbin ZHANG Wenfeng DING Min YANG Yuying YANG Han ZHAI Xuefeng XU Dazhong WANG Sujan DEBNATH Muhammad JAMIL Hao Nan Li Hafiz Muhammad ALI Munish Kumar GUPTA Zafar SAID | 2021 | Chinese Journal of Aeronautics2021，34，6： | 11 |
| 2 | Cryogenic minimum quantity lubrication machining: from mechanism to application显示文摘Cutting fluid plays a cooling-lubrication role in the cutting of metal materials.However,the substantial usage of cutting fluid in traditional flood machining seriously pollutes the environment and threatens the health of workers.Environmental machining technologies,such as dry cutting,minimum quantity lubrication(MQL),and cryogenic cooling technology,have been used as substitute for flood machining.However,the insufficient cooling capacity of MQL with normal-temperature compressed gas and the lack of lubricating performance of cryogenic cooling technology limit their industrial application.The technical bottleneck of mechanical-thermal damage of difficult-to-cut materials in aerospace and other fields can be solved by combining cryogenic medium and MQL.The latest progress of cryogenic minimum quantity lubrication(CMQL)technology is reviewed in this paper,and the key scientific issues in the research achievements of CMQL are clarified.First,the application forms and process characteristics of CMQL devices in turning,milling,and grinding are systematically summarized from traditional settings to innovative design.Second,the cooling-lubrication mechanism of CMQL and its influence mechanism on material hardness,cutting force,tool wear,and workpiece surface quality in cutting are extensively revealed.The effects of CMQL are systematically analyzed based on its mechanism and application form.Results show that the application effect of CMQL is better than that of cryogenic technology or MQL alone.Finally,the prospect,which provides basis and support for engineering application and development of CMQL technology,is introduced considering the limitations of CMQL. | Mingzheng LIU Changhe LI Yanbin ZHANG Qinglong AN Min YANG Teng GAO Cong MAO Bo LIU Huajun CAO Xuefeng XU Zafar SAID Sujan DEBNATH Muhammad JAMIL Hafz Muhammad ALI Shubham SHARMA | 2021 | Frontiers of Mechanical Engineering2021，16，4： | 8 |
| 3 | Milling Force Model for Aviation Aluminum Alloy: Academic Insight and Perspective Analysis显示文摘Aluminum alloy is the main structural material of aircraft,launch vehicle,spaceship,and space station and is processed by milling.However,tool wear and vibration are the bottlenecks in the milling process of aviation aluminum alloy.The machining accuracy and surface quality of aluminum alloy milling depend on the cutting parameters,material mechanical properties,machine tools,and other parameters.In particular,milling force is the crucial factor to determine material removal and workpiece surface integrity.However,establishing the prediction model of milling force is important and difficult because milling force is the result of multiparameter coupling of process system.The research progress of cutting force model is reviewed from three modeling methods:empirical model,finite element simulation,and instantaneous milling force model.The problems of cutting force modeling are also determined.In view of these problems,the future work direction is proposed in the following four aspects:(1)high-speed milling is adopted for the thin-walled structure of large aviation with large cutting depth,which easily produces high residual stress.The residual stress should be analyzed under this particular condition.(2)Multiple factors(e.g.,eccentric swing milling parameters,lubrication conditions,tools,tool and workpiece deformation,and size effect)should be considered comprehensively when modeling instantaneous milling forces,especially for micro milling and complex surface machining.(3)The database of milling force model,including the corresponding workpiece materials,working condition,cutting tools(geometric figures and coatings),and other parameters,should be established.(4)The effect of chatter on the prediction accuracy of milling force cannot be ignored in thin-walled workpiece milling.(5)The cutting force of aviation aluminum alloy milling under the condition of minimum quantity lubrication(mql)and nanofluid mql should be predicted. | Zhenjing Duan Changhe Li Wenfeng Ding Yanbin Zhang Min Yang Teng Gao Huajun Cao Xuefeng Xu Dazhong Wang Cong Mao Hao Nan Li Gupta Munish Kumar Zafar Said Sujan Debnath Muhammad Jamil Hafiz Muhammad Ali | 2021 | Chinese Journal of Mechanical Engineering2021，34，1： | 7 |
| 4 | Correlation between electrical conductivity–optical band gap energy and precursor molarities ultrasonic spray deposition of ZnO thin films显示文摘ZnO thin films were deposited using the simple,flexible and cost-effective spray ultrasonic technique at different precursor molarities values.The films were deposited on a glass substrate at 350 C.This paper is to presentanewapproachtothedescriptionofcorrelationbetweenelectricalconductivityandopticalgapenergywith precursor molarity of ZnO thin films.The ZnO films exhibit higher electrical n-type semiconductors,whose band gap energy increased from 3.08 to 3.37 eV with an increasing of precursor molarity of 0.05 to 0.1 M.The maximum value of electrical conductivity of the films is 7.96(cm)1obtained in the ZnO thin film for precursor molarity0.125 M.The correlation between the electrical and the optical properties with the precursor molarity suggests that the electrical conductivity of the films is predominantly influenced by the band gap energy and the precursor molarity.The measurement of the electrical conductivity of the films with correlation is equal to the experimental with the error is about 1%in the higher conductivity. | Said Benramache Okba Belahssen Abderrazak Guettaf Ali Arif | 2013 | Journal of Semiconductors2013，34，11： | 5 |
| 5 | Nano-enhanced biolubricant in sustainable manufacturing:From processability to mechanisms显示文摘To eliminate the negative effect of traditional metal-working fluids and achieve sustainable manufacturing,the usage of nano-enhanced biolubricant(NEBL)is widely researched in minimum quantify lubrication(MQL)machining.It's improved tool wear and surface integrity have been preliminarily verified by experimental studies.The previous review papers also concluded the major influencing factors of processability including nano-enhancer and lubricant types,NEBL concentration,micro droplet size,and so on.Nevertheless,the complex action of NEBL,from preparation,atomization,infiltration to heat transfer and anti-friction,is indistinct which limits preparation of process specifications and popularity in factories.Especially in the complex machining process,in-depth understanding is difficult and meaningful.To fll this gap,this paper concentrates on the comprehensive quantitative assessment of processability based on tribological,thermal,and machined surface quality aspects for NEBL application in turning,milling,and grinding.Then it attempts to answer mechanisms systematically considering multi-factor influence of molecular structure,physicochemical properties,concentration,and dispersion.Firstly,this paper reveals advanced lubrication and heat transfer mechanisms of NEBL by quantitative comparison with biolubricant-based MQL machining.Secondly,the distinctive filmformation,atomization,and infiltration mechanisms of NEBL,as distinguished from metal-working fluid,are clarified combining with its unique molecular structure and physical properties.Furtherly,the process optimization strategy is concluded based on the synergistic relationship analysis among process variables,physicochemical properties,machining mechanisms,and performance of NEBL.Finally,the future development directions are put forward aiming at current performance limitations of NEBL,which requires improvement on preparation and jet methods respects.This paper will help scientists deeply understand effective mechanism,formulate process specifications,and find future development trend of this technology. | Yanbin ZHANG Hao Nan LI Changhe LI Chuanzhen HUANG Hafiz Muhammad ALI Xuefeng XU Cong MAO Wenfeng DING Xin CUI Min YANG Tianbiao YU Muhammad JAMIL Munish Kumar GUPTA Dongzhou JIA Zafar SAID | 2022 | Friction2022，10，6： | 5 |
| 6 | Electrostatic atomization minimum quantity lubrication machining:from mechanism to application显示文摘Metal cutting fluids(MCFs)under flood conditions do not meet the urgent needs of reducing carbon emission.Biolubricant-based minimum quantity lubrication(MQL)is an effective alternative to flood lubrication.However,pneumatic atomization MQL has poor atomization properties,which is detrimental to occupational health.Therefore,electrostatic atomization MQL requires preliminary exploratory studies.However,systematic reviews are lacking in terms of capturing the current research status and development direction of this technology.This study aims to provide a comprehensive review and critical assessment of the existing understanding of electrostatic atomization MQL.This research can be used by scientists to gain insights into the action mechanism,theoretical basis,machining performance,and development direction of this technology.First,the critical equipment,eco-friendly atomization media(biolubricants),and empowering mechanisms of electrostatic atomization MQL are presented.Second,the advanced lubrication and heat transfer mechanisms of biolubricants are revealed by quantitatively comparing MQL with MCF-based wet machining.Third,the distinctive wetting and infiltration mechanisms of electrostatic atomization MQL,combined with its unique empowering mechanism and atomization method,are compared with those of pneumatic atomization MQL.Previous experiments have shown that electrostatic atomization MQL can reduce tool wear by 42.4%in metal cutting and improve the machined surface Ra by 47%compared with pneumatic atomization MQL.Finally,future development directions,including the improvement of the coordination parameters and equipment integration aspects,are proposed. | Wenhao Xu Changhe Li Yanbin Zhang Hafiz Muhammad Ali Shubham Sharma Runze Li Min Yang Teng Gao Mingzheng Liu Xiaoming Wang Zafar Said Xin Liu Zongming Zhou | 2022 | International Journal of Extreme Manufacturing2022，4，4： | 4 |
| 7 | Corneal sensitivity,ocular surface health and tear film stability after punctal plug therapy of aqueous deficient dry eye显示文摘·AIM: To evaluate the effect of punctal occlusion using thermosensitive(smart plug) versus silicone plug for management of aqueous deficient dry eye on cornea sensitivity, ocular surface health and tear film stability.·METHODS: A comparative prospective interventiona case study included 45 patients with bilateral severe form of aqueous deficient dry eye. In each patient, the smar plug was inserted in the lower punctum of the right eye which was considered as study group 1 and silicone plug was inserted in the lower punctum of the left eye o the same patient which was considered as study group2. All patients were subjected to careful history taking and questionnaire for subjective assessment of severity of symptoms. Corneal sensitivity, corneal fluorescein rose bengal staining, Schirmer's I test, tear film break up time and conjunctival impression cytology were performed pre and 1, 3 and 6mo post plug insertion.·RESULTS: A statistically significant improvement in subjective and objective manifestations occurred following treatment with both types of plugs(P <0.01)The thermosensitive plug caused significant overal improvement, decrease in frequency of application o tear substitutes and improvement of conjunctiva impression cytology parameters in the inserted side(P <0.01). Canaliculitis was reported in two eyes(4.4% following punctal occlusion using thermosensitive plug(study group 1). Spontaneous plug loss occurred in 21eyes(46.6%) in the silicone plug group(study group 2).·CONCLUSION: Improvement of subjective and objective manifestations of aqueous deficient dry eye occurs following punctal plug occlusion. Thermosensitive plug has good patient's compliance with fewer complications and lower rates of loss compared to the silicone plug. | Azza Mohamed Ahmed Said Mona Elsayed Farag Tarek Mohamed Abdulla Othman Ali Othman Ziko Wesam Mohamed Osman | 2016 | International Journal of Ophthalmology(English edition)2016，9，11： | 4 |
| 8 | Quantitative analysis of cefixime via complexation with palladium(Ⅱ) in pharmaceutical formulations by spectrophotometry显示文摘An optimized and validated spectrophotometric method has been developed for the determination of cefixime in pharmaceutical formulations. The method is based on the complexation reaction between cefixime and palladium ion in the presence of acidic buffer solution (pH 3) in ethanol-distilled water medium at room temperature. The complex absorbed maximally at 352 nm. Beer's law is obeyed in the working concentration range of 2.5-35 μg/mL with apparent molar absorptivity of 1.015×104L/mol cm and Sandell's sensitivity of 0.001 μg/cm2 /0.001 absorbance unit. The limits of detection and quantitation for the proposed method are 0.175 and 0.583 μg/mL, respectively. The effect of common excipients used as additives has been studied in the determination of cefixime. The proposed method has been successfully applied for the determination of cefixime in pharmaceutical formulations. The results obtained by the proposed method were statistically compared with the reference method using t and F values and found no significant difference between the two methods. | Syed Najmul Hejaz Azmi Bashir Iqbal Nada Said Hassan Al-Humaimi Iman Rashid Saif Al-Salmani Noora Ali Saad Al-Ghafri Nafisur Rahman | 2013 | Journal of Pharmaceutical Analysis2013，3，4： | 3 |
| 9 | Impact of cirrhosis on surgical outcome after pancreaticoduodenectomy显示文摘AIM:To elucidate surgical outcomes of pancreaticoduodenectomy(PD)in patients with liver cirrhosis.METHODS:We studied retrospectively all patients who underwent PD in our centre between January 2002and December 2011.Group A comprised patients with cirrhotic livers,and Group B comprised patients with non-cirrhotic livers.The cirrhotic patients had ChildPugh classes A and B(patient’s score less than 8).Preoperative demographic data,intra-operative data and postoperative details were collected.The primary outcome measure was hospital mortality rate.Secondary outcomes analysed included duration of the operation,postoperative hospital stay,postoperative morbidity and survival rate.RESULTS:Only 67/442 patients(15.2%)had cirrhotic livers.Intraoperative blood loss and blood transfusion were significantly higher in group A(P=0.0001).The mean surgical time in group A was significantly longer than that in group B(P=0.0001).Wound complications(P=0.02),internal haemorrhage(P=0.05),pancreatic fistula(P=0.02)and hospital mortality(P=0.0001)were significantly higher in the cirrhotic patients.Postoperative stay was significantly longer in group A(P=0.03).The median survival was 19 mo in group A and 24 mo in group B.Portal hypertension(PHT)was present in 16/67 cases of cirrhosis(23.9%).The intraoperative blood loss and blood transfusion were significantly higher in patients with PHT(P=0.001).Postoperative morbidity(0.07)and hospital mortality(P=0.007)were higher in cirrhotic patients with PHT.CONCLUSION:Patients with periampullary tumours and well-compensated chronic liver disease should be routinely considered for PD at high volume centres with available expertise to manage liver cirrhosis.PD is associated with an increased risk of postoperative morbidity in patients with liver cirrhosis;therefore,it is only recommended in patients with Child A cirrhosis without portal hypertension. | Ayman El Nakeeb Ahmad M Sultan Tarek Salah Mohamed El Hemaly Emad Hamdy Ali Salem Ahmed Moneer Rami Said Ahmed AbuEleneen Mostafa Abu Zeid Talaat Abdallah Mohamed Abdel Wahab | 2013 | World Journal of Gastroenterology2013，19，41： | 3 |
| 10 | Machinability of ultrasonic vibration-assisted micro-grinding in biological bone using nanolubricant显示文摘Bone grinding is an essential and vital procedure in most surgical operations.Currently,the insufficient cooling capacity of dry grinding,poor visibility of drip irrigation surgery area,and large grinding force leading to high grinding temperature are the technical bottlenecks of micro-grinding.A new micro-grinding process called ultrasonic vibration-assisted nanoparticle jet mist cooling(U-NJMC)is innovatively proposed to solve the technical problem.It combines the advantages of ultrasonic vibration(UV)and nanoparticle jet mist cooling(NJMC).Notwithstanding,the combined effect of multi parameter collaborative of U-NJMC on cooling has not been investigated.The grinding force,friction coefficient,specific grinding energy,and grinding temperature under dry,drip irrigation,UV,minimum quantity lubrication(MQL),NJMC,and U-NJMC micro-grinding were compared and analyzed.Results showed that the minimum normal grinding force and tangential grinding force of U-NJMC micro-grinding were 1.39 and 0.32 N,which were 75.1%and 82.9%less than those in dry grinding,respectively.The minimum friction coefficient and specific grinding energy were achieved using U-NJMC.Compared with dry,drip,UV,MQL,and NJMC grinding,the friction coefficient of U-NJMC was decreased by 31.3%,17.0%,19.0%,9.8%,and 12.5%,respectively,and the specific grinding energy was decreased by 83.0%,72.7%,77.8%,52.3%,and 64.7%,respectively.Compared with UV or NJMC alone,the grinding temperature of U-NJMC was decreased by 33.5%and 10.0%,respectively.These results showed that U-NJMC provides a novel approach for clinical surgical micro-grinding of biological bone. | Yuying YANG Min YANG Changhe LI Runze LI Zafar SAID Hafiz Muhammad ALI Shubham SHARMA | 2023 | Frontiers of Mechanical Engineering2023，18，1： | 3 |
| 11 | The Effect of a Flipping Classroom on Writing Skill in English as a Foreign Language and Students' Attitude Towards Flipping显示文摘 | Mervat Abd Elfatah Ali Said Ahmed | 2016 | US-China Foreign Language2016，14，2： | 3 |
| 12 | Association of gene variants with susceptibility to type 2 diabetes among Omanis显示文摘AIM:To investigate the association of 10 known common gene variants with susceptibility to type 2diabetes mellitus(T2D)among Omanis.METHODS:Using case-control design,a total of992 diabetic patients and 294 normoglycemic Omani Arabs were genotyped,by an allelic discrimination assay-by-design TaqMan method on fast real time polymerase chain reaction system,for the following gene variants:KCNJ11(rs5219),TCF7L2(rs7903146),CDKAL1(rs10946398),CDKN2A/B(rs10811661),FTO(rs9939609 and rs8050136),IGF2BP2(rs4402960),SLC30A8(rs13266634)CAPN10(rs3792267)and HHEX(rs1111875).T2D patients were recruited from the Diabetes Clinic(n=243)and inpatients(n=749)at Sultan Qaboos Univesity Hospital(SQUH),Muscat,Oman.Adult control participants(n=294)were volunteers from the community and from those visiting Family Medicine Clinic at SQU,for regular medical checkup.The difficulty in recruiting Omani participants with no family history of diabetes was the main reason behind the small number of control participants in this study.Almost all volunteers questioned had a relativewith diabetes mellitus.Inspite of the small number of normoglycemic controls in this study,this sample was sufficient for detection of genes and loci for common alleles influencing T2D with an odds ratio of≥1.3reaching at least 80%power.Data was collected from June 2010 to February 2012.RESULTS:Using binary logistic regression analysis,four gene variants showed significant association with T2D risk:KCNJ11(rs5219,P=5.8×10^(-6),OR=1.74),TCF7L2(rs7903146,P=0.001,OR=1.46),CDKAL1(rs10946398,P=0.002,OR=1.44)and CDKN2A/B(rs10811661,P=0.020,OR=1.40).The fixation index analysis of these four gene variants indicated significant genetic differentiation between diabetics and controls{[KCNJ11(rs5219),P<0.001],[TCF7L2(rs7903146),P<0.001],[CDKAL1(rs10946398),P<0.05],[CDKN2A/B(rs10811661),P<0.05]}.The highest genotype variation%between diabetics and controls was found at KCNJ11(2.07%)and TCF7L2(1.62%).This study was not able to detect an association of T2D risk with gene variants of IGF2BP2(rs4402960),SLC30A8(rs13266634),CAPN10(rs3792267)and HHEX(rs1111875).Moreover,no association was found between FTO gene variants(rs9939609 and rs8050136)and T2D risk.However,T2D risk was found to be significantly associated with obesity(P=0.002,OR=2.22);and with the Waist-to-Hip ratio(n=532,P=1.9×10^(-7),OR=2.4),[among males(n=234,P=1.2×10^(-4),OR=2.0)and females(n=298,P=0.001,OR=6.3)].CONCLUSION:Results confirmed the association of KCNJ11(rs5219),TCF7L2(rs7903146),CDKAL1(rs10946398)and CDKN2A/B(rs10811661)gene variants with susceptibility to T2D among Omani Arabs. | Sawsan Al-Sinani Nicolas Woodhouse Ali Al-Mamari Omaima Al-Shafie Mohammed Al-Shafaee Said Al-Yahyaee Mohammed Hassan Deepali Jaju Khamis Al-Hashmi Mohammed Al-Abri Khalid Al-Rassadi Syed Rizvi Yengo Loic Philippe Froguel Riad Bayoumi | 2015 | World Journal of Diabetes2015，6，2： | 3 |
| 13 | Minimum quantity lubrication machining of aeronautical materials using carbon group nanolubricant: From mechanisms to application显示文摘It is an inevitable trend of sustainable manufacturing to replace flood and dry machining with minimum quantity lubrication(MQL)technology.Nevertheless,for aeronautical difficult-tomachine materials,MQL couldn’t meet the high demand of cooling and lubrication due to high heat generation during machining.Nano-biolubricants,especially non-toxic carbon group nano-enhancers(CGNs)are used,can solve this technical bottleneck.However,the machining mechanisms under lubrication of CGNs are unclear at complex interface between tool and workpiece,which characterized by high temperature,pressure,and speed,limited its application in factories and necessitates in-depth understanding.To fill this gap,this study concentrates on the comprehensive quantitative assessment of tribological characteristics based on force,tool wear,chip,and surface integrity in titanium alloy and nickel alloy machining and attempts to answer mechanisms systematically.First,to establish evaluation standard,the cutting mechanisms and performance improvement behavior covering antifriction,antiwear,tool failure,material removal,and surface formation of MQL were revealed.Second,the unique film formation and lubrication behaviors of CGNs in MQL turning,milling,and grinding are concluded.The influence law of molecular structure and micromorphology of CGNs was also answered and optimized options were recommended by considering diverse boundary conditions.Finally,in view of CGNs limitations in MQL,the future development direction is proposed,which needs to be improved in thermal stability of lubricant,activity of CGNs,controllable atomization and transportation methods,and intelligent formation of processing technology solutions. | Xin CUI Changhe LI Wenfeng Ding Yun CHEN Cong MAO Xuefeng XU Bo LIU Dazhong WANG Hao Nan LI Yanbin ZHANG Zafar SAID Sujan DEBNATH Muhammad JAMIL Hafiz Muhammad ALI Shubham SHARMA | 2022 | Chinese Journal of Aeronautics2022，35，11： | 3 |
| 14 | 团头鲂、鳡及其杂交F1代的形态差异与系统发育研究显示文摘利用不同亚科的雌性团头鲂(Megalobrama amblycephala)和雄性鳡(Elopichthys bambusa)进行人工杂交获得子一代杂交个体,对团头鲂、鳡及其杂交子代的形态特征进行比较和分析,并对团头鲂(♀)×鳡(♂)的线粒体全基因组序列进行扩增和分析。结果显示,在传统可量性状和框架结构中,杂交F1的性状更加偏向于母本团头鲂。在可数性状上,杂交子代的背鳍棘数、胸鳍棘数、腹鳍棘数和臀鳍棘数与母本团头鲂及父本鳡都一致;而其余大多数性状,如背鳍鳍条数、腹鳍鳍条数、臀鳍鳍条数、侧线鳞数、侧线上鳞数、侧线下鳞数和鳔室数,杂交子代的性状更接近于母本团头鲂。杂交鱼的线粒体基因组序列全长为16623 bp,与母本团头鲂一致,其碱基组成为31.23%A、16.19%G、24.69%T和27.90%C,且具有一定的A+T偏向性。其线粒体基因组共编码37个基因,分别为13个蛋白质编码基因、22个tRNA基因和2个rRNA基因,还有1个非编码区(D-Loop)。系统发育树结果显示,团头鲂(♀)×鳡(♂)与母本团头鲂的亲缘关系较近,与父本鳡的亲缘关系较远。 | 陈静 SHALABY Hany said ali 易少奎 王卫民 | 2020 | 华中农业大学学报2020，39，1： | 2 |
| 15 | Biological Stability of Water-Based Cutting Fluids:Progress and Application显示文摘The application of cutting fluid in the field of engineering manufacturing has a history of hundreds of years,and it plays a vital role in the processing efficiency and surface quality of parts.Among them,water-based cutting fluid accounts for more than 90%of the consumption of cutting fluid.However,long-term recycling of water-based cutting fluid could easily cause deterioration,and the breeding of bacteria could cause the cutting fluid to fail,increase manufacturing costs,and even endanger the health of workers.Traditional bactericides could improve the biological stability of cutting fluids,but they are toxic to the environment and do not conform to the development trend of low-carbon manufacturing.Low-carbon manufacturing is inevitable and the direction of sustainable manufacturing.The use of nanomaterials,transition metal complexes,and physical sterilization methods on the bacterial cell membrane and genetic material could effectively solve this problem.In this article,the mechanism of action of additives and microbial metabolites was first analyzed.Then,the denaturation mechanism of traditional bactericides on the target protein and the effect of sterilization efficiency were summarized.Further,the mechanism of nanomaterials disrupting cell membrane potential was discussed.The effects of lipophilicity and the atomic number of transition metal complexes on cell membrane penetration were also summarized,and the effects of ultraviolet rays and ozone on the destruction of bacterial genetic material were reviewed.In other words,the bactericidal performance,hazard,degradability,and economics of various sterilization methods were comprehensively evaluated,and the potential development direction of improving the biological stability of cutting fluid was proposed. | Lizhi Tang Yanbin Zhang Changhe Li Zongming Zhou Xiaolin Nie Yun Chen Huajun Cao Bo Liu Naiqing Zhang Zafar Said Sujan Debnath Muhammad Jamil Hafiz Muhammad Ali Shubham Sharma | 2022 | Chinese Journal of Mechanical Engineering2022，35，1： | 2 |
| 16 | 四个脂肪酸合成酶基因在哺乳动物细胞中的超表达提高长链多不饱和脂肪酸生物合成效率显示文摘DHA(22:6n-3)、EPA(20:5n-3)和ARA(20:4n-6)三种长链多不饱和脂肪酸在生物体内活性最强,它们在促进大脑发育和功能维持以及在预防和治疗心血管疾病、炎症、癌症等多种疾病方面有着重要作用。然而,尽管哺乳动物体内有完整的长链多不饱和脂肪酸合成酶系,但哺乳动物合成这些长链多不饱和脂肪酸的效率很低而主要依赖于食物获取。本研究应用转基因方法,将哺乳动物来源的Δ6和Δ5脂肪酸去饱和酶以及Δ6和Δ5脂肪酸延长酶这4种酶的编码基因构建成为一个多基因表达载体,然后转染哺乳动物细胞HEK293T,实现了4个目的基因的超表达,再通过气质联用(GC-MS)分析证实了DHA、EPA和ARA等长链多不饱和脂肪酸的合成效率及水平显著增加,DHA的水平更是提高了2.5倍。由此可见,哺乳动物具有某种抑制长链多不饱和脂肪酸高水平合成的机制,但通过Δ6和Δ5脂肪酸去饱和酶以及Δ6和Δ5脂肪酸延长酶的超表达,能够打破哺乳动物这种抑制机制,从而显著提高DHA、EPA、ARA等的合成水平。同时,本研究的思路也为在转基因动物中生产长链多不饱和脂肪酸提供了重要的启示。 | 朱贵明 Abdulmomen Ali Mohammed Saleh Said Ahmed Bahwal 汪坤福 王明富 王迪迪 葛堂栋 孙洁 | 2014 | 生物工程学报2014，30，9： | 2 |
| 17 | A review on phase change energy storage: materials and applications显示文摘 | Mohammed M Farid Amar M Khudhair Siddique Ali K Razack Said Al-Hallaj | 2003 | Energy Conversion and Management2003，，9： | 2 |
| 18 | Effect of deep cryogenic treatment on the properties of 80CrMo12 5 tool steel显示文摘The effect of deep cryogenic treatment on the mechanical properties of 80CrMo12 5 tool steel was investigated. Moreover, the effects of stabilization (holding at room temperature for some periods before deep cryogenic treatment) and tempering before deep cryogenic treatment were studied. The results show that deep cryogenic treatment can eliminate the retained austenite, making a better carbide distribution and a higher carbide amount. As a result, a remarkable improvement in wear resistance of cryogenically treated specimens is observed. Moreover, the ultimate tensile strength increases, and the toughness of the sample decreases. It is also found that both stabilization and tempering before deep cryogenic treatment decrease the wear resistance, hardness, and carbides homogeneity compared to the deep cryogenically treated samples. It is concluded that deep cryogenic treatment should be performed without any delay on samples after quenching to reach the highest wear resistance and hardness. | Kamran Amini Said Nategh Ali Shafyei Ahmad Rezaeian | 2012 | International Journal of Minerals,Metallurgy and Materials2012，19，1： | 2 |
| 19 | Characterization of Tunisian marine sediments in Rades and Gabes harbors显示文摘The objective of this article is to study the geotechnical and environmental characteristics of sediments dredged from two Tunisian harbors:Rades and Gabes.The first harbor represents the main facility place in the national transport chain.The second one is selected as its sediments present a serious ecological constraint caused by the discharge of wastes into the marine environment.These sediments are either discarded at sea or landfilled despite their harmful effects on the environment.The article is divided into three main sections.The first one presents the material that was carried for Rades and Gabes harbors.The conservation conditions and the used experimental tests are detailed.Geotechnical characterization includes the determination of the grain size distribution,the water content,the Atterberg limits,the methylene blue value,the specific area,the bulk density,the specific unit weight,the organic and carbonate contents.Environmental characterization is assessed by the determination of metals concentrations in a leaching solution.The second section deals with the description and analysis of geotechnical properties of Rades and Gabes harbors' sediments.The results obtained show that Rades harbor sediments are slightly sandy clayey silts whereas Gabes harbor sediments are silty sands characterized by a highly plastic clay fraction.Both of the two sediments don't exhibit a high organic content.Finally,chemical,mineralogical and environmental properties are presented and then analysed.The experimental results obtained show that Rades and Gabes sediments could be used as a sand substitute in the formulation of a new construction material.Gabes harbor sediments are more polluted than Rades harbor sediments. | Imen BEL HADJ ALI Zoubeir LAFHAJ Mounir BOUASSIDA Imen SAID | 2014 | International Journal of Sediment Research2014，29，3： | 2 |
| 20 | Vegetable Oil-Based Nanolubricants in Machining:From Physicochemical Properties to Application显示文摘Cutting fluid is crucial in ensuring surface quality and machining accuracy during machining.However,traditional mineral oil-based cutting fluids no longer meet modern machining’s health and environmental protection require-ments.As a renewable,pollution-free alternative with excellent processing characteristics,vegetable oil has become an inevitable replacement.However,vegetable oil lacks oxidation stability,extreme pressure,and antiwear proper-ties,which are essential for machining requirements.The physicochemical characteristics of vegetable oils and the improved methods’application mechanism are not fully understood.This study aims to investigate the effects of viscosity,surface tension,and molecular structure of vegetable oil on cooling and lubricating properties.The mechanisms of autoxidation and high-temperature oxidation based on the molecular structure of vegetable oil are also discussed.The study further investigates the application mechanism and performance of chemical modification and antioxidant additives.The study shows that the propionic ester of methyl hydroxy-oleate obtained by epoxidation has an initial oxidation temperature of 175℃.The application mechanism and extreme pressure performance of conventional extreme pressure additives and nanoparticle additives were also investigated to solve the problem of insufficient oxidation resistance and extreme pressure performance of nanobiological lubricants.Finally,the study discusses the future prospects of vegetable oil for chemical modification and nanoparticle addition.The study provides theoretical guidance and technical support for the industrial application and scientific research of vegetable oil in the field of lubrication and cooling.It is expected to promote sustainable development in the manufacturing industry. | Xiaotian Zhang Changhe Li Zongming Zhou Bo Liu Yanbin Zhang Min Yang Teng Gao Mingzheng Liu Naiqing Zhang Zafar Said Shubham Sharma Hafiz Muhammad Ali | 2023 | Chinese Journal of Mechanical Engineering2023，36，4： | 2 |
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