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球磨与蒸汽联合处理玉米秸秆提高水解效率的研究

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湖南师范大学自然科学学报 2024年第1期47卷 10-15页

作者：黄其田 rasool Kamal 陆洪斌张珺璐龚志伟赵宗保中国科学院大连化学物理研究所生物技术部中国大连116023 武汉科技大学化学与化工学院中国武汉430080

为了开发绿色且高效的木质纤维素处理新技术,以玉米秸秆为模型原料,将球磨预处理与蒸汽预处理相结合用以提高玉米秸秆水解效率。研究结果表明:球磨预处理可显著提高秸秆水解效率,在10%固载量条件下,4 mm秸秆经过球磨预处理后,水解后葡... 详细信息

为了开发绿色且高效的木质纤维素处理新技术,以玉米秸秆为模型原料,将球磨预处理与蒸汽预处理相结合用以提高玉米秸秆水解效率。研究结果表明:球磨预处理可显著提高秸秆水解效率,在10%固载量条件下,4 mm秸秆经过球磨预处理后,水解后葡萄糖和还原糖的回收率分别由38%和36%提高至65%和58%;在球磨预处理的基础上,将秸秆浸入6 g·L-1NaOH并在121℃条件下蒸汽预处理1 h,水解后葡萄糖和还原糖的回收率均达到100%,且在此预处理条件下,当固载量由10%增加至30%时,葡萄糖和还原糖的回收率仍可达到77.14%和75.82%;另外,TOC和TN分析表明,在预处理条件优化和水解效率显著提高的同时,秸秆中的非糖副产物的水解率也显著提高,圆红酵母最高可在秸秆固载量为20%时获得的水解液中进行生长和油脂发酵,生物量、油脂产量和油脂含量分别为16.00 g·L-1,6.00 g·L-1和35.61%。

关键词：木质纤维素预处理酶法水解圆红酵母油脂

Combined alkaline and ultrasonic pretreatment of sludge before aerobic digestion

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Journal of Environmental Sciences 2009年第3期21卷 279-284页

作者： MAHAR rasool Bux Department of Environmental Science and Engineering Tsinghua University

Alkaline and ultrasonic sludge disintegration can be used as the pretreatment of waste activated sludge （WAS） to promote the subsequent anaerobic or aerobic digestion. In this study, different combinations of these two methods were investigated. The evaluation was based on the quantity of soluble chemical oxygen demand （SCOD） in the pretreated sludge as well as the degradation of organic matter in the subsequent aerobic digestion. For WAS samples with combined pretreatment, the released COD levels were higher than those with ultrasonic or alkaline pretreatment alone. When combined with the ultrasonic treatment, NaOH treatment was more efficient than Ca（OH）2 for WAS solubilization. The COD levels released in various sequential options of combined NaOH and ultrasonic treatments were in the the following descending order： simultaneous treatment 〉 NaOH treatment followed by ultrasonic treatment 〉 ultrasonic treatment followed by NaOH treatment. For simultaneous treatment, low NaOH dosage （100 g/kg dry solid）, short duration （30 min） of NaOH treatment, and low ultrasonic specific energy （7500 kJ/kg dry solid） were suitable for sludge disintegration. Using combined NaOH and ultrasonic pretreatment with optimal parameters, the degradation efficiency of organic matter was increased from 38.0% to 50.7%, which is much higher than that with ultrasonic （42.5%） or with NaOH pretreatment （43.5%） in the subsequent aerobic digestion at the same retention time.

关键词： waste activated sludge (WAS) ultrasonic treatment alkaline treatment aerobic digestion

Clinical Insights:Prevalence of β-Thalassemia Mutations(IVSI-5,FSC8/9,and CD41/42)in the Swat District

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Journal of Bio-X Research 2024年第1期7卷 1-7页

作者： Sumaia Saif Shah Lila Gulalai Ghani Murad Ali Rahat Akhtar rasool Muhammad Israr Department of Forensic Sciences University of SwatKhyber PakhtunkhwaPakistan Centre for Animal Sciences and Fisheries University of SwatKhyber PakhtunkhwaPakistan

Background:Thalassemia is a prevalent condition characterized by decreased production or absence of hemoglobin globin *** are 2 types of thalassemia,alpha thalassemia and beta thalassemia(β-thalassemia),classified according to defects in the alpha or beta protein chain.β-Thalassemia results from a diverse range of mutations in theβsubunit of the hemoglobin gene(HBB).This results in severe reductions in erythrocyte and hemoglobin ***,more than 40,000 babies are born withβ-thalassemia *** are approximately 80 millionβ-thalassemia *** Pakistan,the annual birth rate ofβ-thalassemia major carriers is approximately 6,000,and 50,000 to 100,000 patients suffer from this common inherited ***-1,IVSI-5(G>C),Fr 8/9(+G),Fr 41/42(-TTCT),and del 619 are the 5 most common mutations that account for 90%ofβ-thalassemia cases in *** study aimed to investigate the prevalence ofβ-thalassemia mutations(IVSI-5,Fr 41/42,and Fr 8/9)in the Swat district and to analyze the blood morphology of different mutant thalassemia blood ***:A cross-sectional study was performed at the Forensic Research Lab University of Swat from December 2021 to March *** study included a total of 150 blood *** analysis of blood morphology through microscopy was carried out on samples from patients with differentβ-thalassemia mutations and normal *** DNA extraction was performed according to the Sambrook protocol,and DNA was quantified via agarose gel *** mutations were detected by amplification refractory mutation system(ARMS)-polymerase chain reaction(PCR).The frequencies of differentβ-thalassemia mutations were ***:Thalassemia blood cells were more hypochromic and microcytic than normal blood cells,although no differences were detected in the morphology of IVSI-5,Fr 8/9,or CD41/42 mutant blood *** IVSI-5,Fr 8/9,and CD41/42 mutations were analyzed through agarose ge

关键词： Thalassemia annually Pakistan

A functorial approach to categorical resolutions

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Science China Mathematics 2020年第10期63卷 2005-2016页

作者： rasool Hafezi Mohammad Hossein Keshavarz School of Mathematics Institute for Research in Fundamental Sciences(IPM)Tehran 19395-5746Iran

Using a relative version of Auslander’s formula,we give a functorial approach to show that the bounded derived category of every Artin algebra admits a categorical ***,in particular,implies that the bounded derived categories of Artin algebras of finite global dimension determine bounded derived categories of all Artin ***,this paper can be considered as a typical application of functor categories,introduced in representation theory by Auslander(1971),to categorical resolutions.

关键词： categorical resolutions Artin algebras Auslander’s formula

STABILITY ANALYSIS OF A CAPACITIVE FGM MICRO-BEAM USING MODIFIED COUPLE STRESS THEORY

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Acta Mechanica Solida Sinica 2013年第4期26卷 427-440页

作者： Behrokh Abbasnejad Ghader Rezazadeh rasool Shabani Mechanical Engineering Department Urmia University

Based on the Modified Couple Stress Theory,a functionally graded micro-beam under electrostatic forces is *** FGM micro-beam is made of two materials and material properties vary continuously along the beam thickness according to a *** and static pull-in voltages are obtained and it is shown that the static and dynamic pull-in voltages for some materials cannot be obtained using classic theories and components of couple stress must be taken into *** addition,it is shown that the values of pull-in voltages depend on the variation through the thickness of the volume fractions of the two constituents.

关键词： MEMS FGM micro-beam stability pull-in voltage electrostatic pressure modified couple stress theory

Structural and Mechanical Properties of Al/B_4C Composites Fabricated by Wet Attrition Milling and Hot Extrusion

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Journal of Materials Science & Technology 2013年第8期29卷 725-730页

作者： Morteza Alizadeh Mostafa Alizadeh rasool Amini Department of Materials Science and Engineering Shiraz University of TechnologyModarres Blvd.71555-313 ShirazIran Department of Metals Institute of Materials Science and EngineeringGraduate University of Advanced TechnologyP.O.Box 76315-115KermanIran

In this study, Al matrix composites reinforced by 7.5 and 15 vol.% B4C particles and also monolithic Al （Al without the B4C particles） were produced by wet attrition milling and subsequent hot forward extrusion processes. The microstructure of the composites, evaluated by scanning electron microscopy （SEM）, showed that the B4C particles were properly distributed in the Al matrix. Mechanical properties of the Al/B4C composites and monolithic Al were investigated by tensile, wear and hardness tests, The results revealed that with increasing content of B4C particles, the tensile strength and microhardness of composites increased but the elongation decreased. In addition, the tensile strength and microhardness of composite samples were higher than those of monolithic Al. The density measurements revealed that the density of composites decreased with increasing content of the B4C particles.

关键词： Composites Mechanical properties Attrition milling Hot extrusion

On the monomorphism category of n-cluster tilting subcategories

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Science China Mathematics 2022年第7期65卷 1343-1362页

作者： Javad Asadollahi rasool Hafezi Somayeh Sadeghi Department of Pure Mathematics Faculty of Mathematics and StatisticsUniversity of IsfahanIsfahan 81746-73441Iran School of Mathematics and Statistics Nanjing University of Information Science&TechnologyNanjing 210044China

Let M be an n-cluster tilting subcategory of mod-Λ,whereΛis an Artin *** S(M)denote the full subcategory of S(Λ),the submodule category of Λ,consisting of all the monomorphisms in *** construct two functors from S(M)to mod-Λ,the category of finitely presented additive contravariant functors on the stable category of *** show that these functors are full,dense and objective and hence provide equivalences between the quotient categories of S(M)and mod-Λ.We also compare these two functors and show that they differ by the n-th syzygy functor,provided M is an n Z-cluster tilting *** functors can be considered as higher versions of the two functors studied by Ringel and Zhang(2014)in the case Λ=k[x]/and generalized later by Eiríksson(2017)to self-injective Artin *** applications are provided.

关键词： submodule categories n-abelian categories n-cluster tilting subcategories

An Improved Perturb and Observe Maximum Power Point Tracking Algorithm for Photovoltaic Power Systems

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Journal of Modern Power Systems and Clean Energy 2023年第4期11卷 1165-1175页

作者： rasool Kahani Mohsin Jamil M.Tariq Iqbal Department of Electrical and Computer Engineering Memorial University of NewfoundlandSt.John’sA1B 3X5Canada

This paper aims to improve the performance of the conventional perturb and observe(P&O)maximum power point tracking(MPPT)*** the oscillation around the maximum power point(MPP)is the main disadvantage of this technique,we introduce a modified P&O algorithm to conquer this *** new algorithm recognizes approaching the peak of the photovoltaic(PV)array power curve and prevents the oscillation around the *** key to achieve this goal is testing the change of output power in each cycle and comparing it with the change in array terminal power of the previous *** a decrease in array terminal power is observed after an increase in the previous cycle or in the opposite direction,an increase in array terminal power is observed after a decrease in the previous cycle;it means we are at the peak of the power curve,so the duty cycle of the boost converter should remain the same as the previous ***,an optimized duty cycle is introduced,which is adjusted based on the operating point of PV ***,a DC-DC boost converter powered by a PV array simulator is used to test the proposed *** the irradiance changes,the proposed algorithm produces an averageηMPPT of nearly 3.1%greater than that of the conventional P&O algorithm and the incremental conductance(In C)*** addition,under strong partial shading conditions and drift avoidance tests,the proposed algorithm produces an averageηMPPT of nearly 9%and 8%greater than that of the conventional algorithms,respectively.

关键词： Photovoltaic system maximum power point tracking(MPPT) perturb and observe(P&O) boost converter steady-state performance

Challenges for Expert Evidence in the Justice System of Pakistan

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Journal of Forensic Science and Medicine 2022年第2期8卷 62-67页

作者： Nouman rasool Muzamal rasool Center for Professional and Applied Studies LahorePunjabPakistan High Court LahorePunjabPakistan

Expert evidence is admissible under articles 59 and 164 of Qanun-e-Shahadat Ordinance,1984(Law of Evidence),in the courts of law in ***,the enacted laws and judicial precedents are inadequate to help a trial judge to get an answer to the question about the reliability and credibility of expert *** process of judicial scrutiny of the expert evidence is challenging in the absence of national guidelines/standards,nonaccreditation of crime laboratories,and poor scientific knowledge of judges and ***,the judges encounter difficulty in evaluating the knowledge and skills of an expert,validity of principles and methodologies used,application of quality management system,relatability,and reliability of expert *** facing difficulty in ascertaining the level of certitude of expert evidence,the courts accept the expert testimony only when it corroborates the prosecution's propositions,which is a kind of disservice to *** reliance of courts on expert evidence varies from case to case,which can be observed in the form of many sporadic judicial decisions.

关键词： Admissibility expert evidence forensic science justice system of Pakistan reliability