检索结果-南通市图书馆

Anisotropic stellar structures in the f(T)theory of gravity with quintessence via embedding approach

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2021年第4期45卷 426-439页

作者： Allah Ditta mushtaq ahmad Ibrar Hussain G.Mustafa Department of Mathematics COMSATS University IslamabadLabore CampusPakistan National University of Computer and Emerging Sciences Chiniot-Faisalabad CampusPakistan School of Electrical Engineering and Computer Science National University of Sciences and TechnologyH-12IslanpabadPakistan Department of Mathematics Shanghai UniversityShanghai 200444China

This work suggests a new model for anisotropic compact stars with quintessence in f(T)gravity by us-ing the off-diagonal tetrad and the power-law as f(T)=βT^(n),where T is the scalar torsion andβand n are real *** acquired field equations incorporating the anisotropic matter source along with the quintessence field,in f(T)gravity,are investigated by making use of the specific character of the scalar torsion T for the observed stars PSRJ1614-2230,***-3,EXO1785-248,and *** is suggested that all the stellar struc-tures under examination are advantageously independent of any central singularity and are *** graphical analysis shows that various physical features which are crucially important for the emergence of the stellar structures are conferred.

关键词： quintessence power-law model f(T)gravity anisotropic compact stars

Potential for Pakistani traditional medicinal plants to combat diabetes

在线全文

学校读者我要写书评

暂无评论

Journal of Traditional Chinese Medicine 2014年第4期34卷 488-490页

作者： Mashwani Zia-ur-rehman Khan Mirajab ahmad mushtaq Department of Botany Pir Mehr Ali Shah Arid Agriculture University Rawalpindi 46300 Pakistan Department of Plant Sciences QuaidiAzam UniversityIslamabad 45320Pakistan Department of Plant Sciences QuaidiAzam UniversityIslamabad 45320Pakistan

OBJECTIVE: To investigate the potential of medicinal plants used in traditional healing in Pakistan to inhibit the glycation process. This may be useful in combatting diabetes mellitus and its ***: The in vitro antiglycation activity of 10 medicinal plants was examined by testing the ability of the extracts to inhibit the methyl-glyoxal-mediated development of fluorescence of bovine ***: Of the tested plants, Persicaria barbata,Geranium collinum and Berberis lyciumshowed significant inhibition of the formation of advanced glycation end products. The inhibitory capacity of these plants was 68.89%, 62.06% and 54.23%, respectively, compared with the positive control(rutin; 86%). All other plants inhibited AGE formation ***:These findings will be helpful for further research into the use of traditional herbal medicines with antiglycation properties in the treatment of diabetes.

关键词： Diabetes mellitus Plants medicinal Medicine traditional Antiglycation

Chemical characteristics,oxidative potential,and sources of PM_(2.5)in wintertime in Lahore and Peshawar,Pakistan

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2021年第4期33卷 148-158页

作者： mushtaq ahmad Qing Yu Jing Chen Siming Cheng Weihua Qin Yuepeng Zhang State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentBeijing Normal UniversityBeijing 100875China Department of Environmental Sciences University of PeshawarPeshawar 25120Pakistan

The chemical characteristics,oxidative potential,and sources of PM_(2.5)were analyzed at the urban sites of Lahore and Peshawar,Pakistan in February *** species,water soluble ions,and metal elements were measured to investigate the chemical composition and sources of PM_(2.5).The dithiothreitol(DTT)consumption rate was measured to evaluate the oxidative potential of PM_(2.5).Both cities showed a high exposure risk of PM_(2.5)regarding its oxidative potential(DTT v).Carbonaceous and some of the elemental species of PM_(2.5)correlated well with DTT v in both Lahore and ***,the DTT v of PM_(2.5)in Lahore showed significant positive correlation with most of the measured water soluble ions,however,ions were DTT-inactive in *** to the higher proportions of carbonaceous species and metal elements,Peshawar showed higher mass-normalized DTT activity of PM_(2.5)compared to Lahore although the average PM_(2.5)concentration in Peshawar was *** high concentrations of toxic metals also posed serious non-carcinogenic and carcinogenic risks to the residents of both *** component analysis coupled with multiple linear regression was applied to investigate different source contributions to PM_(2.5)and its oxidative *** sources of traffic and road dust resuspension and coal combustion,direct vehicle emission,and biomass burning and formation of secondary aerosol were identified as the major sources of PM_(2.5)in both *** findings of this study provide important data for evaluation of the potential health risks of PM_(2.5)and for formulation of efficient control strategies in major cities of Pakistan.

关键词： Air pollution DTT Health risk Oxidative potential Source apportionment

Wild melon: a novel non-edible feedstock for bioenergy

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2018年第2期15卷 405-411页

作者： Maria Ameen Muhammad Zafar mushtaq ahmad Anjuman Shaheen Ghulam Yaseen Biofuel Laboratory Department of Plant Sciences Quaid-i-Azam University Department of Environmental Science Female CampusInternational Islamic University Islamabad

In the present research work, a non-edible oil source Cucumis melo var. agrestis （wild melon） was systematically identified and studied for biodiesel production and its characterization. The extracted oil was 29.1% of total dry seed weight. The free fatty acid value of the oil was found to be 0.64%, and the single-step alkaline transesterification method was used for conversion of fatty acids into their respective methyl esters. The maximum conversion efficiency of fatty acids was obtained at 0.4 wt% NaOH （used as catalyst）, 30% （methanol to oil, v/v） methanol amount, 60 ℃ reaction temperature, 600-rpm agitation rate and 60-min reaction time. Under these optimal conditions, the conversion efficiency of fatty acid was 92%. However, in the case of KOH as catalyst, the highest conversion （85%） of fatty acids was obtained at 40% methanol to oil ratio, 1.28 wt% KOH, 60 ℃ reaction temperature, 600-rpm agitation rate and 45 min of reaction time. Qualitatively, biodiesel was characterized through Fourier transform infrared spectroscopy （FFIR） and gas chromatography and mass spectroscopy （GC-MS）. FTIR results demonstrated a strong peak at 1742 cm-1, showing carbonyl groups （C=O） of methyl esters. However, GC-MS results showed the presence of twelve methyl esters comprised of lauric acid, myristic acid, palmitic acid, non-decanoic acid, hexadecanoic acid, octadecadienoic acid and octadecynoic acid. The fuel properties were found to fall within the range recommended by the international biodiesel standard, i.e., American Society of Testing Materials （ASTM）： flash point of 91℃, density of 0.873 kg/L, viscosity of 5.35 cSt, pour point of - 13 ℃, cloud point of -10 ℃, total acid number of 0.242 mg KOH/g and sulfur content of 0.0043 wt%. The present work concluded the potential of wild melon seed oil as excellent non-edible source of bioenergy.

关键词： Cucumis melo var. agrestis Wild melon seed oil (WMSO) Transesterification Bioenergy Characterization Fuel properties

Arbuscular mycorrhizal fungi for salinity stress: Anti-stress role and mechanisms

在线全文

学校读者我要写书评

暂无评论

Pedosphere 2023年第1期33卷 212-224页

作者： Muzafar HDAR Syed MRAZVI Narender SINGH ahmad mushtaq Shahnawaz DAR Shabber HUSSAIN Department of Botany Kurukshetra UniversityKurukshetraHaryana 136119India Department of Plant Breeding and Genetics Sher-e Kashmir University of Agricultural Sciences and Technology of Kashmir(SKUAST-K)ShalimarSrinagar 190021India Research Center for Residue and Quality Analysis SKUAST-KShalimarSrinagar 190021India Krishi Vigyan Kendra(KVK)Kargil 11(Zanskar) SKUAST-KShalimarSrinagar 190021India

Salinity stress is considered one of the most harmful environmental plant stresses,as it reduces irrigated land crop production by over 20%***,it is imperative to develop salt-tolerant crops in addition to understanding various mechanisms enabling plant growth under saline stress ***,a novel biological approach that aims to address salinity stress has gained momentum,which involves the use of arbuscular mycorrhizal(AM)fungi in plant-microbe *** has been observed that most terrestrial plant root systems are colonized by AM fungi,which modulate plant growth in multiple *** such interactions,AM fungi obtain organic compounds from the host plant while providing mineral nutrients,including nitrogen,phosphorus,potassium,calcium,and sulfur,to the host *** recent decades,our understanding of the multifunctional roles played by AM fungi has been broadened and advanced,particularly regarding the mediation of mineral nutrients and the alleviation of stress(especially salt stress)in most crop *** uptake of phosphorus and augmented tolerance to salinity result in enhanced plant growth and *** evident anti-stress role of AM fungi and related mechanisms have been described separately,though they need to be analyzed and discussed ***,the present review addresses the major role of AM fungi in mitigating salt stress and their beneficial effects on plant growth and *** mechanisms employed by AM fungi to amplify the salt tolerance of host plants by increased nutrient accession(e.g.,phosphorus,nitrogen,and calcium),physiological changes(e.g.,photosynthetic efficiency,cell membrane permeability,water status,and nitrogen fixation),and biochemical changes(e.g.,the accumulation of different osmolytes such as proline and soluble sugars)are also ***,this review highlights the role of AM fungi in the Na+/H+*** plants,AM fungi inoculation increases the activities of mul

关键词： biochemical and physiological changes osmolytes plant-microbe interaction salt stress sodium accumulation

Ethnopharmacological evaluation and antioxidant activity of some important herbs used in traditional medicines

在线全文

学校读者我要写书评

暂无评论

Journal of Traditional Chinese Medicine 2016年第5期36卷 689-694页

作者： Sofia Rashid mushtaq ahmad Muhammad Zafar Asad Anwar Shazia Sultana Shahzadi Tabassum Sidra Nisar Ahmed Department of Plant Sciences Quaid-i-Azam University Institute of Biochemistry and Biotechnology Pir Mehr Ali Shah (PMAS) University of Arid Agriculture

OBJECTIVE: To document the indigenous knowledge and evaluate the antioxidant activity of medicinal herbs used for treatment of various ***: The ethnomedicinal data were collected through semi-structured interviews of local informants along with collection of herbarium specimens. The antioxidant activity was evaluated by using 1-diphenyl-2-picryl-hydrazyl radical scavenging ***: A total of 12 important medicinal herbs were evaluated for ethnomedicinal uses and antioxidant activity. Medicinal plant diversity showed that Solanaceae was the dominating family(3 spp.),followed by Asteraceae and Lamiaceae(both 2spp.). Leaves(31%) were most frequently used in preparation of traditional medicines, and the most recommended mode of preparation was powder(28%). The antioxidant results revealed that thehighest activity was found in Atropa acuminata and Crocus ***: The results of this study proved that A. accuminata and C. sativus can be the excellent sources of antioxidant compounds. A sustainable use and conservation of the valuable natural resource greatly promote the development of functional food additives and cosmetics.

关键词： Plants medicinal Medicine Traditional Antioxidants Ethnopharmacology

Sinapic acid ameliorates D-galactosamine/lipopolysaccharideinduced fulminant hepatitis in rats:Role of nuclear factor erythroidrelated factor 2/heme oxygenase-1 pathways

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2021年第7期27卷 592-608页

作者： mushtaq ahmad Ansari Mohammad Raish Yousef A Bin Jardan Ajaz ahmad Mudassar Shahid SheikhFayaz ahmad Nazrul Haq Mohammad Rashid Khan Saleh A Bakheet Department of Pharmacology and Toxicology College of PharmacyKing Saud UniversityRiyadh 11451Saudi Arabia Department of Pharmaceutics College of PharmacyKing Saud UniversityRiyadh 11451Saudi Arabia Department of Clinical Pharmacy College of PharmacyKing Saud UniversityRiyadh 11451Saudi Arabia

BACKGROUND Sinapic acid(SA)has been shown to have various pharmacological properties such as antioxidant,antifibrotic,anti-inflammatory,and anticancer *** mechanism of action is dependent upon its ability to curb free radical production and protect against oxidative stress-induced tissue *** To study the hepatoprotective effects of SA against lipopolysaccharide(LPS)/Dgalactosamine(D-GalN)-induced acute liver failure(ALF)in *** Experimental ALF was induced with an intraperitoneal(i.p.)administration of 8μg LPS and 800 mg/kg D-GalN in normal *** was administered orally once daily starting 7 d before LPS/D-GalN *** Data showed that SA ameliorates acute liver dysfunction,decreases serum levels of alanine transaminase(ALT),and aspartate aminotransferase(AST),as well as malondialdehyde(MDA)and NO levels in ALF model ***,pretreatment with SA(20 mg/kg and 40 mg/kg)reduced nuclear factor kappalight-chain-enhancer of activated B cells(NF-κB)activation and levels of inflammatory cytokines(tumor necrosis factor-αand interleukin 6).Also,SA increased the activity of the nuclear factor erythroid-related factor 2/heme oxygenase-1(Nrf2/HO-1)signaling *** In conclusion,SA offers significant protection against LPS/D-GalN-induced ALF in rats by upregulating Nrf2/HO-1 and downregulating NF-κB.

关键词： Sinapic acid D-galactosamine/lipopolysaccharide Oxidative stress Fulminant hepatitis Antioxidant Nuclear factor erythroid-related factor 2/heme oxygenase-1 pathways

Multiquadric Radial Basis Function Approximation Scheme for Solution of Total Variation Based Multiplicative Noise Removal Model

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2021年第1期126卷 55-88页

作者： mushtaq ahmad Khan Ahmed BAltamimi Zawar Hussain Khan Khurram Shehzad Khattak Sahib Khan Asmat Ullah Murtaza Ali University of Engineering and Technology Mardan23200Pakistan University of Hail HailSaudi Arabia University of Engineering and Technology Peshawar25000Pakistan Politecnico di Torino Torino10129Italy

This article introduces a fastmeshless algorithm for the numerical solution nonlinear partial differential equations(PDE)by Radial Basis Functions(RBFs)approximation connected with the Total Variation(TV)-basedminimization functional and to show its application to image denoising containing multiplicative *** capabilities used within the proposed algorithm have not only the quality of image denoising,edge preservation but also the property of minimization of staircase effect which results in blocky effects in the *** is worth mentioning that the recommended method can be easily employed for nonlinear problems due to the lack of dependence on a mesh or integration *** numerical investigations and corresponding examples prove the effectiveness of the recommended algorithm regarding the robustness and visual improvement as well as peak-signal-to-noise ratio(PSNR),signal-to-noise ratio(SNR),and structural similarity index(SSIM)corresponded to the current conventional TV-based schemes.

关键词： Denoised image multiplicative and speckle noises total variation(TV)filter Euler-Lagrange restoration equation multiquadric radial basis functions meshless and mesh-based schemes

斜纹夜蛾抗性种群中酶抑制剂对杀虫剂的增效作用(英文)

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

昆虫学报 2009年第6期52卷 631-639页

作者： mushtaq ahmad Plant Protection Division Nuclear Institute for Agriculture and Biology

采用浸液生测法研究了斜纹夜蛾Spodoptera litura巴基斯坦抗性种群中酶抑制剂[胡椒基丁醚(PBO)和脱叶膦(DEF)]对丙溴磷、灭多威、硫双灭多威、氯氰菊酯、氯氟氰菊酯、联苯菊酯、茚虫威和多杀菌素等杀虫剂的增效作用。结果表明:PPO和DEF... 详细信息

采用浸液生测法研究了斜纹夜蛾Spodoptera litura巴基斯坦抗性种群中酶抑制剂[胡椒基丁醚(PBO)和脱叶膦(DEF)]对丙溴磷、灭多威、硫双灭多威、氯氰菊酯、氯氟氰菊酯、联苯菊酯、茚虫威和多杀菌素等杀虫剂的增效作用。结果表明:PPO和DEF对氨基甲酸酯杀虫剂灭多威和硫双灭多威均具有增效作用,但对有机磷杀虫剂丙溴磷不具有增效作用。两种抑制剂对氯氰菊酯均产生增效作用,但对联苯菊酯没有增效作用。PPO和DEF增加了氯氟氰菊酯对Multan种群的毒性,但没有增加其对Mailsi种群的毒性。DEF对多杀菌素具有增效作用,但PBO对其没有增效作用。PBO和DEF对氨基甲酸酯杀虫剂、拟除虫菊酯杀虫剂、茚虫威和多杀菌素具有明显的增效作用,这说明细胞色素P450单加氧酶和酯酶的解毒作用至少部分参与了斜纹夜蛾对这些杀虫剂的抗性过程。不过,两种增效剂对杀虫剂增效作用范围有限,暗示对于斜纹夜蛾巴基斯坦种群而言,其他的机制(如靶位点不敏感、表皮穿透作用降低)可能是更重要的抗性机制。

关键词：斜纹夜蛾杀虫剂抗性增效作用胡椒基丁醚(PBO) 脱叶膦(DEF)