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Food Science and Human Wellness 2023年第5期12卷 1571-1579页

作者： Zongshuai Zhu Anthony Pius Bassey Ming Huang iftikhar ali khan College of Food Science and Technology Nanjing Agricultural UniversityNanjing 210095China National R&D Center for Poultry Processing Technology Nanjing Huangjiaoshou Food Science and Technology Co.Ltd.Nanjing 211200China Institution of Agricultural Products Processing Jiangsu Academy of Agricultural SciencesNanjing 210095China

Investigation that protein oxidation to the formation of advanced glycation end products(AGEs)after chicken myofibrillar protein glycation is *** of protein oxidation induced by different concentrations of hydroxyl radicals(·OH)were developed after the chicken myofibrillar protein mild glycation(MPG).Results exhibited that levels of AGEs and surface hydrophobicity(H_(0))steadily increased with the a ddition of h ydrogen peroxide(H_(2)O_(2))***,levels of s ulfhydryl group,free amino group,and particle size gradually decreased with the H_(2)O_(2)*** protein carbonyl value increased in H_(2)O_(2)concentration until 10 mmol/***'s correlation indicated that MPG structure modification(unfolding and degradation)induced by protein oxidation were significantly positively correlated with AGEs concentration(P<0.05).Finally,a mechanism was proposed to hypothesize t he effect of protein oxidation on the formation of AGEs under MPG conditions.

关键词： Protein oxidation Glycated myofibrillar protein Structure changes Advanced glycation end products

Glyoxal induced advanced glycation end products formation in chicken meat emulsion instead of oxidation

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Food Science and Human Wellness 2022年第4期11卷 828-836页

作者： Rui Fang Zongshuai Zhu Anthony Pius Bassey iftikhar ali khan Ming Huang College of Food Science and Technology Nanjing Agricultural UniversityNanjing 210095China Center Testing International Pinbiao(Jiangsu) Certifi cation Technology Co.Ltd.Nanjing 210046China Shenzhen Key Laboratory of Marine Microbiome Engineering Institute for Advanced StudyShenzhen UniversityShenzhen 518060China Nanjing Huangjiaoshou Food Science and Technology Co.Ltd. Jiangsu Research Center for Livestock and Poultry Products Processing Engineering TechnologyNanjing 211200China

Advanced glycation end products(AGE) are potential harmful substances formed in the advanced Maillard reaction and increasingly investigated in muscle foods. However, the contribution of oxidation to the AGE formation is controversial. Moreover, reports on glyoxal(GO) induced AGE formation in chicken meat emulsion(CME) are limited. Thus, the effects of GO on emulsifying properties, rheological behavior and AGE formation in CME were investigated. Our findings exhibited that levels of Nε-carboxymethyllysine(CML) and Nε-carboxyethyllysine(CEL) were associated with lipid oxidation but not significantly(P > 0.05). Levels of AGE peaked when GO concentration ranged from 5 mmol/L(CML) to 10 mmol/L(CEL). The droplets’ aggregation associated with the disulfide bond when the concentration of GO was at 0.5–30 mmol/L while non-disulfide bond association occurred at 30–50 mmol/L GO concentration. In conclusion, compared to the effect of oxidation, GO exhibited the main role in the AGE formation of CME. This study will provide theoretical significance for further understanding and controlling the formation of AGE in CME.

关键词： Glyoxal Emulsion Oxidation Advanced glycation end products Chicken meat

Robust Half-Metallicity and Magnetic Properties of Cubic Perovskite CaFeO_(3)

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Chinese Physics Letters 2013年第4期30卷 192-196页

作者： Zahid ali iftikhar Ahmad Banaras khan Imad khan Materials Modeling Center Department of PhysicsUniversity of MalakandChakdaraDir(L)Pakistan Department of Physics Hazara UniversityMansehraPakistan

Theoretical studies of the cubic perovskite CaFeO3 are performed using the full potential linearized augmented plane-wave method with GGA+*** calculated structural parameters are consistent with the experimental *** tolerance factor reveals the cubic phase of the *** spin polarized electronic band structures and densities of states as well as the integer value of the magnetic moment of the unit cell(4μB)demonstrate that CaFeO_(3)is half *** in CaFeO_(3)is due to Fe^(+4)–O^(2)–Fe^(+4)superexchange *** robust properties of the compound show that with their compression up to a certain critical lattice constant,known as the robust transition lattice constant,an abrupt change in the electronic and magnetic properties occurs;the compounds lose their integer magnetic moment and become metallic.

关键词： integer cubic magnetic

Superposition of Stationary Wave Fields Via Atom Microscopy

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Communications in Theoretical Physics 2015年第3期63卷 340-346页

作者： Hizbullah Anwar ali khan Naveed khan iftikhar Ahmad Bakht Amin Bacha Department of Physics University of Malakand Chakdara Department of Physics Hazara University

We investigate one-dimensional position microscopy of a three-level atom moving through a stationary wave region under the condition of electromagnetically induced *** precise position information of an atom is observed on the resonance absorption and dispersion distribution spectrum of a weak probe *** and multiple localization peaks are observed in specific directions of the corresponding wave numbers and phase of the standing wave *** strength of space-independent Rabi frequency reduces the position uncertainty in the localized peaks without disturbing the probability of the *** a hot atomic medium the localized probability of an atom is reduced which depends upon the temperature of that *** results provide useful applications in the development of laser cooling,atom nanolithography and Bose-Einstein condensation.

关键词： 1D atom localization superposition of standing waves fields

Structural and optoelectronic properties of CsLnZnTe_(3)(Ln=La,Pr,Nd and Sm)

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Journal of Rare Earths 2023年第3期41卷 388-396,I0003页

作者： Imad khan Ihsan Ullah Izaz Ul Haq Akbar ali A.Dahshan Zahid ali iftikhar Ahmad Center for Computational Materials Science Department of PhysicsUniversity of MalakandChakdaraPakistan Department of Physics Faculty of ScienceKing Khalid UniversityP.O.Box 9004AbhaSaudi Arabia Department of Physics Faculty of SciencePort Said UniversityPort SaidEgypt Gomal University Dera Ismail KhanPakistan

Zinc telluride is a versatile wide band gap semiconductor used in many *** it has certain limitations like large dimensions and large band *** alkali metal to its bulk lattice(3D)can reduce its dimensions and lanthanide can produce a red shift in the energy gap by converting it into quaternary *** alkali and lanthanide incorporated quaternary zinc tellurides CsLnZnTe_(3)(Ln=La,Pr,Nd and Sm)form layered crystal structure in which_(∞)^(2)[LnZnTe_(3)]-layers are separated by Cs+*** famous lanthanide contraction is experimental both from lattice constants and bond *** calculated band gaps are 2.26,2.28,2.12,2.05 eV for CsLaZnTe_(3),CsPrZnTe_(3),CsNdZnTe_(3) and CsSmZnTe_(3),*** compounds show direct band gap *** energy band gaps of these compounds have not been evaluated yet both experimentally and *** loss functions,refractive index and dielectric functions were also calculated to explore the potential applications of CsLnZnTe_(3) in optoelectronic devices.

关键词： Chalcogenides Optical materials Electronic structure Dimensions reduction Ab-initio calculations Rare earths

An Algorithm to Reduce Compression Ratio in Multimedia Applications

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Computers, Materials & Continua 2023年第1期74卷 539-557页

作者： Dur-e-Jabeen Tahmina khan Rumaisa iftikhar ali Akbar Siddique Samiya Asghar Department of Electronic Engineering Sir Syed University of Engineering&TechnologyKarachiPakistan Department of Information&Computer Science Sir Syed University of Engineering&TechnologyKarachiPakistan

In recent years,it has been evident that internet is the most effective means of transmitting information in the form of documents,photographs,or videos around the *** purpose of an image compression method is to encode a picture with fewer bits while retaining the decompressed image’s visual *** transmission,this massive data necessitates a lot of channel *** order to overcome this problem,an effective visual compression approach is required to resize this large amount of *** work is based on lossy image compression and is offered for static color *** quantization procedure determines the compressed data quality *** images are converted from RGB to International Commission on Illumination CIE La^(∗)b^(∗);and YCbCr color spaces before being *** the transform domain,the color planes are encoded using the proposed quantization *** improve the efficiency and quality of the compressed image,the standard quantization matrix is updated with the respective image *** used seven discrete orthogonal transforms,including five variations of the Complex Hadamard Transform,Discrete Fourier Transform and Discrete Cosine Transform,as well as thresholding,quantization,de-quantization and inverse discrete orthogonal transforms with CIE La^(∗)b^(∗);and YCbCr to RGB *** to signal noise ratio,signal to noise ratio,picture similarity index and compression ratio are all used to assess the quality of compressed *** the relevant transforms,the image size and bits per pixel are also *** the(n,n)block of transform,adaptive scanning is used to acquire the best feasible compression *** of these characteristics,multimedia systems and services have a wide range of possible applications.

关键词： Color image compression color spaces discrete orthogonal transforms(DOTs) peak-to-signal noise ratio(PSNR) similarity index

Fault Tolerant Suffix Trees

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Computers, Materials & Continua 2021年第1期66卷 157-164页

作者： iftikhar Ahmad Syed Zulfiqar ali Shah Ambreen Shahnaz Sadeeq Jan Salma Noor Wajeeha Khalil Fazal Qudus khan Muhammad iftikhar khan Department of Computer Science and Information Technology University of Engineering and TechnologyPeshawar25120Pakistan Department of Computer Science Shaheed Benazir Bhutto Women UniversityPeshawar25000Pakistan Department of Information Technology FCITKing Abdulaziz UniversityJeddahSaudi Arabia Department of Electrical Engineering University of Engineering and TechnologyPeshawar25120Pakistan

Classical algorithms and data structures assume that the underlying memory is reliable,and the data remain safe during or after ***,the assumption is perilous as several studies have shown that large and inexpensive memories are vulnerable to bit ***,the correctness of output of a classical algorithm can be threatened by a few memory *** tolerant data structures and resilient algorithms are developed to tolerate a limited number of faults and provide a correct output based on the uncorrupted part of the *** tree is one of the important data structures that has widespread applications including substring search,super string problem and data *** fault tolerant version of the suffix tree presented in the literature uses complex techniques of encodable and decodable error-correcting codes,blocked data structures and fault-resistant *** this work,we use the natural approach of data replication to develop a fault tolerant suffix tree based on the faulty memory random access machine *** proposed data structure stores copies of the indices to sustain memory faults injected by an *** develop a resilient version of the Ukkonen’s algorithm for constructing the fault tolerant suffix tree and derive an upper bound on the number of corrupt suffixes.

关键词： Resilient data structures fault tolerant data structures suffix tree

Control of Wave Propagation and Effect of Kerr Nonlinearity on Group Index

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Communications in Theoretical Physics 2013年第7期60卷 87-92页

作者： Hazrat ali Ziauddin iftikhar Ahmed Department of Physics University of Malakand Department of Physics COMSATS Institute of Information Technology

We use four-level atomic system and control the wave propagation via forbidden decay rate. The Raman gain process becomes dominant on electromagnetically induced transparency (EIT) medium by increasing the forbidden decay rate via increasing the number of atoms [G.S. Agarwal and T.N. Dey, Phys. Rev. A 74 (2005) 043805 and K. Harada, T. Kanbashi, and M. Mitsunaga, Phys. Rev. A 73 (2006) 013803]. The behavior of wave propagation is dramatically changed from normal (subluminal) to anomalous (superluminal) dispersion by increasing the forbidden decay rate. The system can also give a control over the group velocity of the light propagating through the medium via Kerr field.

关键词： normal and anomalous dispersion Kerr field group index

Control of Group Velocity via Spontaneous Generated Coherence and Kerr Nonlinearity

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Communications in Theoretical Physics 2014年第9期61卷 410-416页

作者： Hazrat ali iftikhar Ahmad Ziauddin Department of Physics University of Malakand Khyber Pakhtunkhwa Pakistan Department of Physics COMSATS Institute of Information Technology Islamabad Pakistan Institute of Photonics Technologies National Tsing Hua University

A four-level N-type atomic medium is considered to study the effect of spontaneous generated coherence(SGC) and Kerr nonlinearity on light pulse propagation. A light pulse is propagating inside the medium where each atom follows four-level N-type atom-field configuration of rubidium(85Rb) atom. The atom-field interaction leads to electromagnetically induced transparency(EIT) process. The atom-field interaction is accompanied by normal dispersion and in the presence of SGC and Kerr nonlinearity the dispersion property of the proposed atomic medium is modified,which leads to enhancement of positive group index of the medium. The enhancement of positive group index then leads to slow group velocity inside the medium. A more slow group velocity is also investigated by incorporated the collective effect of SGC and Kerr nonlinearity. The control of group velocity inside a four-level N-type atomic medium via collective effect of SGC and Kerr nonlinearity is the major part of this work.

关键词： Kerr nonlinearity spontaneous generated coherence and group index

Exploring the potential of Sentinel-2A satellite data for aboveground biomass estimation in fragmented Himalayan subtropical pine forest

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Journal of Mountain Science 2020年第12期17卷 2880-2896页

作者： Mobushir Riaz khanI iftikhar Ahmad khan Muhammad Hasan ali BAIG LIU Zheng-jia Muhammad Irfan ASHRAF School of Environmental Science Charles Sturt UniversityAlburyNSW 2640Australia Institute of Geo-information&Earth Observation Arid Agriculture University RawalpindiPakistan&(ii)Department of ForestAzad Jammu&Kashmir Muzaffarabad-i3100Pakistan Institute of Geo-information&Earth Observation(IGEO) PMAS Arid Agriculture University Rawalpindi 46300Pakistan Institute of Geographic Sciences and Natural Resources Research Chinese Academy of SciencesBeijing 100101China Department of Forestry&Range Management PMAS Arid Agriculture University Rawalpindi 46300Pakistan

The Sentinel-2 A satellite having embedded advantage of red edge spectral bands offers multispectral imageries with improved spatial,spectral and temporal resolutions as compared to the other contemporary satellites providing medium resolution *** study was aimed at exploring the potential of Sentinel-2 A imagery to estimate Above Ground Biomass(AGB) of Subtropical Pine Forest in Pakistan administered *** developed an AGB predictive model using field inventory and Sentinel 2 A based spectral and textural parameters along with topographic features derived from ALOS Digital Elevation Model(DEM).Field inventory data was collected from 108 randomly distributed plots(0.1 ha each) across the study *** stepwise linear regression method was employed to investigate the potential relationship between field data and corresponding satellite *** and carbon mapping of the study area was carried out through established AGB estimation model with R(o.86),R2(0.74),adjusted R2(0.72) and RMSE value of 33 t/*** results showed that first order textures(mean,standard deviation and variance) significantly contributed in AGB predictive modeling while only one spectral band ratio made contribution from spectral *** study leads to the conclusion that Sentinel-2 A optical data is a potential source for AGB estimation in subtropical pine forest of the area of interest with added benefit of its free of cost availability,higher quality data and long-term continuity that can be utilized for biomass carbon distribution mapping in the resource constraint study area for sustainable forest management.

关键词： Field inventory Forest Biomass Sentinel 2A AGB Modelling Spectral features Textures