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Journal of Rock Mechanics and Geotechnical Engineering 2019年第1期11卷 202-207页

作者： Hemant Agrawal a.k.mishra Department of Mining Engineering Indian Institute of Technology (Indian School of Mines)

The blast-induced ground vibration prediction using scaled distance regression analysis is one of the most popular methods employed by engineers for many decades. It uses the maximum charge per delay and distance of monitoring as the major factors for predicting the peak particle velocity(PPV). It is established that the PPV is caused by the maximum charge per delay which varies with the distance of monitoring and site geology. While conducting a production blasting, the waves induced by blasting of different holes interfere destructively with each other, which may result in higher PPV than the predicted value with scaled distance regression analysis. This phenomenon of interference/superimposition of waves is not considered while using scaled distance regression analysis. In this paper, an attempt has been made to compare the predicted values of blast-induced ground vibration using multi-hole trial blasting with single-hole blasting in an opencast coal mine under the same geological condition. Further,the modified prediction equation for the multi-hole trial blasting was obtained using single-hole regression analysis. The error between predicted and actual values of multi-hole blast-induced ground vibration was found to be reduced by 8.5%.

关键词： Peak particle velocity(PPV) Blast-induced ground vibration Scaled distance regression analysis Wave superimposition Single-hole blasting

Antimicrobial activities of isoalantolactone, a major sesquiterpene lactone of Inula racemosa

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Chinese Science Bulletin 2001年第6期46卷 498-501页

作者： a.k.mishra Institute of Functional Biomolecule State Key Laboratory of Pharma-ceutical Biotechnology School of Life Science Nanjing University Nanjing China

Isoalantolactone, a major constituent of Inula racemosa (Compositae) was tested for its antimicrobial action against five bacteria, six human and six plant pathogenic fungi. The lactone showed absolute toxicities at 500 μg/mL against 3 soil borne phytopathogenic fungi (Gaeu-mannomyces graminis var. tritici, Rhizoctonia cerealis and Phytophthora capsici) with the MICs determined to be 100, 100 and 300 μg/mL, respectively. At the MICs, isoalantolac-tone exhibited its *** nature of toxicity. The lowest fungicidal concentrations of the lactone to G. graminis var. tritici, R. cerealis and P. capsici were shown to be 150, 150 and 350 μg/mL, respectively. Moreover, isoalantolactonc displayed weaker antibacterial activities against Bacillus subtilis, Escherichia coli, Pseudomonas fluorecense, Sarcina lentus and Staphylococcus aureus with MICs of 125, 425, 150, 150 and 100 μg/mL, respectively. The investigation disclosed the strong inhibition of isoalantolactonc to the phytopatho-gcnic fungi,

关键词： isoalantolactone Inula racemosa antimicrobial.

MHD effect of mixed convection boundary-layer flow of Powell-Eyring fluid past nonlinear stretching surface

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Applied Mathematics and Mechanics(English Edition) 2014年第12期35卷 1525-1540页

作者： S.PANIGRAHI M.REZA a.k.mishra Department of Mathematics National Institute of Science & TechnologyBerhampur 761008 India Department of Mathematics Berhampur UniversityBerhampur 760007 India

Sufficient conditions are found for the existence of similar solutions of the mixed convection flow of a Powell-Eyring fluid over a nonlinear stretching permeable sur- face in the presence of magnetic field. To achieve this, one parameter linear group trans- formation is applied. The governing momentum and energy equations are transformed to nonlinear ordinary differential equations by use of a similarity transformation. These equations are solved by the homotopy analysis method （HAM） to obtain the approximate solutions. The effects of magnetic field, suction, and buoyancy on the Powell-Eyring fluid flow with heat transfer inside the boundary layer are analyzed. The effects of the non- Newtonian fluid （Powell-Eyring model） parameters ε and δon the skin friction and local heat transfer coefficients for the cases of aiding and opposite flows are investigated and discussed. It is observed that the momentum boundary layer thickness increases and the thermal boundary layer thickness decreases with the increase in ε whereas the momentum boundary layer thickness decreases and thermal boundary layer thickness increases with the increase in δ for both the aiding and opposing mixed convection flows.

关键词： stretching surface non-Newtonian fluid mixed convection

Thermally stimulated properties in ZnSe：Tb and ZnSe：(Mn, Tb) phosphors

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Journal of Semiconductors 2018年第2期39卷 13-16页

作者： a.k.mishra S.k.mishra S.P.Pandey kshama Lakshmi mishra SHEAT College of Engineerig Varansi (U.P.) India Army Public School kunraghat Gorakhpur (U.P.) India Department of Physics MM University Ambala Haryana India Shree Thakurdwara Balika Vidyalaya Ghaziabad (U.P.) India

Thermoluminescence studies were performed of ZnSe：Tb and ZnSe：（Mn, Tb） phosphors. A method of preparation for ZnSe phosphors doped with Tb and（Mn, Tb） has been discussed. The thermoluminescence（TL）properties of these phosphors have been studied from 100 to 370 k temperature after exciting by UV radiation（365 nm）at three uniform heating rates 0.4, 0.6 and 0.9 k/s. The trapping parameters like trap depth, lifetime of electrons and capture cross-section have also been determined using various methods.

关键词： thermoluminescence electroluminescence capture cross-section ionizing radiation phosphors Curie's method

Enhanced visible-light photocatalytic activity of multi-elements-doped ZrO_2 for degradation of indigo carmine

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Journal of Rare Earths 2015年第5期33卷 498-506页

作者： E.S.Agorku A.T.kuvarega B.B.Mamba A.C.Pandey a.k.mishra Department of Applied Chemistry University of Johannesburg University of South Africa College of Engineering Science and Technology Nanotechnology & Water Sustainability Research Unit Florida Campus Nanotechnology and Application Centre University of Allahabad

In this study, C,N,S-doped ZrO2 and a series of Eu doped C,N,S-ZrO2 photocatalysts were synthesized by a coprecipitation method using thiourea as the source of C, N and S and Eu（NO3）·6H2O as source of Eu. The materials were characterized by X-ray dif-fraction （XRD）, Raman spectroscopy, Fourier transform infrared spectroscopy （FTIR）, UV-visible diffuse reflectance spectroscopy, scanning electron microscopy （SEM）/energy dispersive X-ray spectroscopy （EDX）, and transmission electron microscopy （TEM）. Indigo carmine （IC） was chosen as a model for organic pollutants and used to evaluate the photocatalytic performance of the photo-catalysts under simulated solar light. Commercial ZrO2 was used as a reference material. XRD and Raman results indicated the for-mation of both tetragonal and monoclinic phase ZrO2 with particle size ranging from 8–30 nm. Multi-element doping had a great in-fluence on the optical responses manifested as red shift in the absorption edge. The highest photocatalytic activity towards IC was observed for the Eu,C,N,S-doped ZrO2 （0.6 mol.%Eu） sample （k=1.09×10–2 min–1）. The commercial ZrO2 showed the lowest photo-degradation activity （k=5.83×10–4 min–1）. The results showed that the control of Eu doping in the C,N,S-ZrO2 was very important in reducing electron-hole recombination. The synergistic effect of Eu, C, N, and S in the ZrO2 matrix led to enhanced utilization of simulated solar energy for the degradation of IC through narrowing of bandgaps.

关键词： photocatalysis indigo carmine multi-elements-doped ZrO2 rare earths

Design of Blast Using High Resolution Camera

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Design of Blast Using High Resolution Camera

The Seventh International Symposium on Rock Fragmentation by Blasting

作者： a.k.mishra R.N.Gupta Indian School of Mines Dhanbad National Institute of Rock Mechanics kGF India

The mining industry is leading towards a technology driven optimisation process. It has been realised that the unit operations such as drilling, blasting, excavation, loading, hauling and crushing are inter related variables in the total cost equations. Development, improvement and utilisation of innovative technologies are important for cost effectiveness of mineral industries. This paper explores the potential to exploit controls over the outputs of the primary blasting operation arising from developments in blast monitoring instruments and explosives technology. Blast design in Indian mines uses the method of trial and error to a large extent. As there cannot be a unique blast design that would serve the varied situations prevailing in mines, site specific and customised blast designs are required to accommodate the different blast environments encountered in the field with different geo-mining conditions. In this paper a new methodology has been proposed to design the blast in opencast coal mines. Blast monitoring studies have been conducted at three open pit coal mine in India. The mines are situated in Jharia and Singrauli Coalfield. The study has been conducted using high-resolution S-VHS video camera, velocity of detonation (VOD) recorder and seismographs.

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连续式电渗析法外理碱性黑液

国外纺织技术（化纤．染整．环境保护分册） 1989年第6期 42-45页

作者： a.k.mishra P.k.Bhattacharya 陈献明

前言关于电渗析法处理黑液的浓差极化及流体的动力学性质的资料很少。早期工作研究了在间歇式条件下,于三隔室电渗析中碱性黑液的电渗析法再生的可行性。应用电渗析法分离黑液的有些资料是有用的,但关于应用中性膜的资料很少。

关键词：染整碱性黑液电渗析法废液处理

Practice patterns among ophthalmic surgeons in treating concomitant oculoplastic conditions in preoperative period:A questionnaire-based study

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World Journal of Clinical Cases 2025年第1期13卷 29-37页

作者： Bijnya Birajita Panda Chitaranjan mishra Bhagabat Nayak Avik kumar Roy Logesh Balakrishnan Priyadarshini mishra Department of Ophthalmology All India Institute of Medical SciencesBhubaneswar 751019OdishaIndia Department of Vitreo-Retina Trilochan NetralayaSambalpur 768004India Department of Glaucoma Services LV Prasad Eye InstituteBhubaneswar 751013India Department of Statistics Apollo HospitalsChennai 823104India

BACkGROUND Addressing oculoplastic conditions in the preoperative period ensures both the safety and functional success of any ophthalmic *** oculoplastic conditions,like nasolacrimal duct obstruction,have been extensively studied,whereas others,like eyelid malposition and thyroid eye disease,have received minimal or no *** To investigate the current practice patterns among ophthalmologists while treating concomitant oculoplastic conditions before any subspecialty ophthalmic *** A cross-sectional survey was disseminated among ophthalmologists all over *** survey included questions related to pre-operative evaluation,anaesthetic and surgical techniques preferred,post-operative care,the use of adjunctive therapies,and patient follow-up *** A total of 180 ophthalmologists responded to the *** practitioners(89%)felt that the ROPLAS test was sufficient during pre-operative evaluation before any subspecialty surgery was *** most common surgical techniques employed were lacrimal drainage procedures(Dacryocystorhinostomy)(63.3%),eyelid malposition repair(36.9%),and ptosis repair(58.7%).Post-operatively,47.7%of respondents emphasized that at least a 4-week gap should be maintained after lacrimal drainage procedures and eyelid ***-seven percent of ophthalmologists felt that topical anaesthetic procedures should be preferred while performing ocular surgeries in thyroid eye disease *** Approximately 50%of ophthalmologists handle prevalent oculoplastic issues themselves,seeking the expertise of an oculoplastic surgeon under particular *** ophthalmologists still favor using ROPLAS as a preliminary screening method before proceeding with cataract *** conditions and thyroid eye disease are not as commonly addressed before subspecialty procedures compared to issues like nasolacrimal duct obstruction and periocular infections.

关键词： Oculoplasty Ophthalmic plastic surgery Nasolacrimal duct obstruction Practice patterns Survey

Anticonvulsant potential of rosuvastatin in combination with carbamazepine and valproate in animal models of epilepsy

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World Journal of Methodology 2025年第2期15卷 137-144页

作者： Vandana Tayal Akash Mandal Ijasul Haque M Akhilesh mishra Bhupinder S kalra Vandana Roy Department of Pharmacology Maulana Azad Medical CollegeNew Delhi 110002India Department of Pharmacology MES Medical CollegePerintalmanna 679338KeralaIndia Department of Central Animal Facility Maulana Azad Medical CollegeNew Delhi 110002India

BACkGROUND Epilepsy impacts millions of people,with many not responding to existing *** evidence links neuroinflammatory processes to *** exhibit anti-inflammatory and neuroprotective properties,potentially offering antiepileptic *** To evaluate the anticonvulsant effects of rosuvastatin in animal models of *** Ninety-six albino mice were divided into 16 *** the maximal electroshock seizure(MES)model,eight groups received intraperitoneal vehicle,carbama-zepine,rosuvastatin,or a *** measured included seizure protection[tonic hind limb extension(THLE)],duration of THLE,seizure duration,and *** the pentylenetetrazol(PTZ)model,eight groups were pretreated with vehicle,valproate,rosuvastatin,or a combination,with outcomes measured as seizure latency,seizure duration,and *** In the MES model,rosuvastatin exhibited protection against THLE in a small percentage of *** shortens the duration of THLE in a dose-dependent ***,none of these were statistically significant com-pared to the control *** combination of rosuvastatin 10 mg/kg with carbamazepine 4 mg/kg resulted in a significant reduction in seizure duration compared to the control group,better than carbamazepine alone at 4 mg/kg and 6 mg/*** the PTZ model,rosuvastatin alone showed no significant effects on latency,duration of seizure,or ***,rosuvastatin 10 mg/kg combined with valproate 100 mg/kg significantly delayed the onset of seizures,seizure duration and mortality percentage,better than valproate alone at 100 mg/*** Rosuvastatin enhanced the anticonvulsant effects of carbamazepine and *** studies are required to explore the antiepileptic potential of rosuvastatin at various doses,durations,dosage forms,routes and models.

关键词： Antiepileptic Anticonvulsant Statins Rosuvastatin Maximal electroshock seizure Pentylenetetrazol

Epigenetic regulation of genes during development: A conserved themefrom flies to mammals

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Journal of Genetics and Genomics 2008年第7期35卷 413-429页

作者： Dasari Vasanthi Rakesh k mishra Centre for Cellular and Molecular Biology Council for Scientific and Industrial Research Uppal Road Hyderabad 500007 India

Eukaryotic genome is organized in form of chromatin within the nucleus. This organization is important for compaction of DNA as well as for the proper expression of the genes. During early embryonic development, genomic packaging receives variety of signals to eventually set up cell type specific expression patterns of genes. This process of regulated chromatinization leads to ＂cell type specific epigenomes＂. The expression states attained during differentiation process need to be maintained subsequently throughout the life of the organism. Epigenetic modifications are responsible for chromatin dependent regulatory mechanism and play a key role in maintenance of the expression state-a process referred to as cellular memory. Another key feature in the packaging of the genome is formation of chromatin domains that are thought to be structural as well as functional units of the higher order chromatin organization. Boundary elements that function to define such domains set the limits of regulatory elements and that of epigenetic modifications. This connection of epigenetic modification, chromatin structure and genome organization has emerged from several studies. Hox genes are among the best studied in this context and have led to the significant understanding of the epigenetic regulation during development. Here we discuss the evolutionarily conserved features of epigenetic mechanisms emerged from studies on homeotic gene clusters.

关键词： epigenetic Hox cluster chromatin boundary Polycomb group tirthorax group cellular memory