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Octa-O-Methoxy Resorcin [4] Arene Amberlite XAD-4 Polymeric Chelating Resin for Solid Phase Extraction, Preconcentration, Separation and Trace Determination of Ni(II), Cu(II), Zn(II) and Cd(II) Ions  [PDF]
Disha J. Vyas, Bharat A. Makwana, Keyur D. Bhatt, Vinod K. Jain
American Journal of Analytical Chemistry (AJAC) , 2013, DOI: 10.4236/ajac.2013.45030
Abstract:

Synthetic resin, Amberlite XAD-4 was linked covalently with the third generation supramolecule, octa-O-methoxy resorcin [4] arene through -N=N-group to form chelating resin, which has been characterized and effectively used for the separation and preconcentration of metal ions such as Ni(II), Cu(II), Zn(II) and Cd(II). Critical parameters such as pH, flow rate, sorption capacity, breakthrough studies, distribution coefficient, preconcentration factor, concentration of eluting agents responsible for quantitative extraction of metal ions were optimized. The synthesized resin showed good binding affinity towards Ni(II), Cu(II), Zn(II) and Cd(II) under selective pH conditions. Good breakthrough capacity and fast exchange kinetics of the resin lead to effective separation of metal ions from their binary and ternary mixture by column method on the basis of pH and eluting agents. The resin could be reused for about 8 -10 cycles. The proposed method having the analytical data with the relative standard deviation (RSD) < 2% and with recoveries of analytes higher than 98%, reflects upon the reproducibility and reliability of the method which has been successfully applied in the separation and determination of Ni(II), Cu(II), Zn(II) and Cd(II) ions in synthetic, natural and ground water samples.

Biosynthesis of Copper Nanoparticles and Their Antimicrobial Activity  [PDF]
Parth Parikh, Dipali Zala, Bharat A. Makwana
Open Access Library PrePrints (OALib PrePrints) , 2014, DOI: 10.4236/oalib.preprints.1200067
Abstract:

Development of green nanotechnology is generating interest of researchers toward ecofriendly biosynthesis of nanoparticles. Biomolecules present in plant extracts can be used to reduce metal ions to nanoparticles in a single-step green synthesis process. This biogenic reduction of metal ion to base metal is quite rapid, readily conducted at room temperature and pressure, and easily scaled up. In this study, biosynthesis of stable copper nanoparticles were done using datura meta leaf extract. These biosynthesized Cu nanoparticles? were characterized by UV/Vis-spectroscopy, Particle size analyzer (PSA), Transmission electron mictroscopy (TEM), Energy dispersive X-ray Analysis (EDX),Fourier transform infrared spectroscopy (FTIR). It was observed that the datura meta leaf extract can reduce copper ions into copper nanoparticles within 8 to 10 min of reaction time. Thus, this method can be used for rapid and ecofriendly biosynthesis of stable copper nanoparticles.Synthesis mediated by plant extracts is environmentally benign. The reducing agents involved include the various water soluble plant metabolites (e.g. alkaloids, phenolic compounds, terpenoids) and co-enzymes. Extracts of a diverse range of plant species have been successfully used in making nanoparticles. In addition to plant extracts, live plants can be used for the synthesis. It was found that copper nanoparticles were also found to exhibit reasonably good antimicrobial activity when compared with standard Chloramphenicol, which suggests its potential use as antimicrobial agent. Hence, there is scope to develop new methods for the synthesis of nanoparticles which should be required inexpensive reagent, less drastic reaction condition and eco-friendly.?

A new incision for unilateral cleft lip repair developed using animated simulation of repair on computer
Sahay A,Bharat R
Indian Journal of Plastic Surgery , 2007,
Abstract: Background: Unilateral cleft lip repair continues to leave behind some amount of dissatisfaction, as a scope for further improvement is always felt. Most surgeons do not like to deviate from the standard Millard′s/ triangular techniques, or their minor modifications, as no one likes to experiment on the face for fear of unfavourable outcomes. The computer can be utilized as a useful tool in the analysis and planning of surgery and new methods can be developed and attempted subsequently with greater confidence. Aim: We decided to see if an improved lip repair could be developed with the use of computers. Materials and Methods: Analysis of previous lip repairs was done to determine where an improvement was required. Movement of tissues, by simulating an ideal repair, using image warping software, on digital images of cleft lip was studied in animation sequences. A repair which could reproduce these movements was planned. A new incision emerged, which had combined the principles of Millard′s and Randall / Tennyson repairs, with additional features. The new method was performed on 30 cases. Conclusions: The results were encouraging as the shortcomings of these methods were minimized, and the advantages maximized.
Severe acute renal failure in malaria.
Mehta K,Halankar A,Makwana P,Torane P
Journal of Postgraduate Medicine , 2001,
Abstract: BACKGROUND: We have noticed a recent rise in the incidence and severity of acute renal failure (ARF) in malaria. AIM: To study the incidence, severity and outcome of ARF in malaria. SETTING and DESIGN: It is a retrospective analysis of data of one year from a tertiary medical centre in a metropolitan city. MATERIALS AND METHODS: Patients with ARF and smear positive malaria were evaluated. STATISTICAL ANALYSIS: Results were expressed as mean, range and standard deviation. RESULTS: Out of 402 detected smear positive malaria, 24 had ARF. Eighteen were of the age group 21-40 years. Plasmodium falciparum (PF) was detected in 16, Plasmodium vivax in three, and mixed infection in five. Non-oliguric ARF was seen in 14. Eighteen showed severe ARF (Serum creatinine >5 mg%). Twenty-two patients needed dialysis. Prolonged ARF lasting for 2-6 weeks was seen in eight. Seventeen patients recovered completely, while seven showed fatal combination of disseminated intravascular coagulation (DIC), acute respiratory distress syndrome (ARDS), severe ARF and PF malaria. No response was seen to chloroquine and artesunate given alone and twenty patients required quinine. CONCLUSION: ARF necessitating dialysis was seen in 92% of patients with ARF in malaria. PF infection, severe ARF, DIC and ARDS were poor prognostic factors. Resistance was noted to both chloroquine and artesunate.
Dimensionality Reduction of Affine Variational Inequalities Using Random Projections
Bharat Prabhakar,Ankur A. Kulkarni
Mathematics , 2014,
Abstract: We present a method for dimensionality reduction of an affine variational inequality (AVI) defined over a compact feasible region. Centered around the Johnson Lindenstrauss lemma, our method is a randomized algorithm that produces with high probability an approximate solution for the given AVI by solving a lower-dimensional AVI. The algorithm allows the lower dimension to be chosen based on the quality of approximation desired. The algorithm can also be used as a subroutine in an exact algorithm for generating an initial point close to the solution. The lower-dimensional AVI is obtained by appropriately projecting the original AVI on a randomly chosen subspace. The lower-dimensional AVI is solved using standard solvers and from this solution an approximate solution to the original AVI is recovered through an inexpensive process. Our numerical experiments corroborate the theoretical results and validate that the algorithm provides a good approximation at low dimensions and substantial savings in time for an exact solution.
Formulation and Evaluation of Once Daily Sustained release matrix tablet of Pramipexole Dihydrochloride
Patel Nishi A,Makwana Sandip T,Patel Zubin P,Solanki Sejal M
International Journal For Pharmaceutical Research Scholars , 2012,
Abstract: The objective of this study was to formulate & evaluate sustained release matrix tablet of PramipexoleDihydrochloride. Pramipexole Dihydrochloride being highly water soluble drug so, hydrophilic matricesalone are not able to control the drug release for 24 hours. Matrix forming agents like hydroxyl propylmethyl cellulose, rosin & glyceryl behenate in varying concentrations were studied to get the desiredsustained release profile over a period of 24 hours. The granules were evaluated for bulk density, angleof repose, compressibility index. Matrix tablets were evaluated for weight variation, hardness, friability& in-vitro release. Release profile of F11 with 15% gum rosin and 25% glyceryl behenate was found tobe 99.7% in 24 hrs which was considered as the optimized formulation. Release profile of formulationF11 was found to be very close to theoretical profile of Pramipexole. The drug release followed zeroorder and found to be diffusion controlled with erosion having high correlation for Higuchi relatedpattern.
Fig (Ficus carica L.) – a new host record of Uncinula aspera Doige var. aspera U. Braun
NARENDER K. BHARAT* and A.K. GUPTA
Indian Phytopathology , 2011,
Abstract:
Are old running shoes detrimental to your feet? A pedobarographic study
Ulfin Rethnam, Nilesh Makwana
BMC Research Notes , 2011, DOI: 10.1186/1756-0500-4-307
Abstract: This was a prospective study involving 11 healthy female volunteers with no previous foot and ankle problems. New running shoes were provided to the participants. Plantar pressures were measured using the Novel Pedar system while walking with new and participants' personal old running shoes. Plantar pressures were measured in nine areas of the feet. Demographic data, age of old running shoes, Body Mass Index (BMI), peak pressures and pressure-time integral were acquired. The right and left feet were selected at random and assessed separately. Statistical analysis was done using the paired t test to compare measurements between old and new running shoes.The mean peak pressures were higher in new running shoes (330.5 ± 79.6 kiloPascals kPa) when compared to used old running shoes (304 ± 58.1 kPa) (p = 0.01). The pressure-time integral was significantly higher in the new running shoes (110 ± 28.3 kPa s) compared to used old running shoes (100.7 ± 24.0 kPa s) (p = 0.01).Plantar pressure measurements in general were higher in new running shoes. This could be due to the lack of flexibility in new running shoes. The risk of injury to the foot and ankle would appear to be higher if running shoes are changed frequently. We recommend breaking into new running shoes slowly using them for mild physical activity.Footwear characteristics have been implicated as a cause of foot pain [1]. Use of customised insoles was found to alleviate post work foot discomfort in healthy individuals whose jobs required long periods of standing and walking [2]. Ill fitting footwear has been associated with foot pain [3]. Individually fitted sport shoes were found to be effective in reducing the incidence of foot fatigue [4]. There is an association between using inappropriate footwear and injuries [5]. An association between injuries and the age of sport shoes has been reported [6]. The recommendations are that running shoes need to be changed every 500 - 700 kilometres as they lose their shock-ab
Unilateral blue sclera: A diagnostic enigma?
Makwana N,Jagannathan M
Indian Journal of Plastic Surgery , 2003,
Abstract:
OPTIMIZATION OF RESONANCE FREQUENCY OF CIRCULAR PATCH ANTENNA AT 5 GHZ USING PARTICLE SWARM OPTIMIZATION
Falguni Raval,Jagruti Makwana
International Journal of Advances in Engineering and Technology , 2011,
Abstract: The microstrip antenna is small in size, simpler and less expensive to manufacture. They are more compatible than reflector antennas with printed-circuit technology. The microstrip patch antenna is a type of antenna that is thin, and has easy manufacturability, which provides a great advantage over traditional antennas. The Particle Swarm Optimization (PSO) has been introduced to the electromagnetic community for few years. In this paper PSO has been used for optimization of resonant frequency of circular probe-fed patch antenna. The investigation is made at a microwave frequency of 5 GHz. This Optimization problem has two variables which are height of dielectric substrate (h) and radius of the circular patch (a). The PSO algorithm is developed using ‘Turbo C’.In order to verify the PSO algorithm, the Rosenbrock function is used as a performance test problem.
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