scholarly journals Voltammetric Evaluation of Diclofenac Tablets Samples through Carbon Black-Based Electrodes

2019 ◽  
Vol 12 (2) ◽  
pp. 83 ◽  
Author(s):  
Carlos Eduardo Peixoto da Cunha ◽  
Edson Silvio Batista Rodrigues ◽  
Morgana Fernandes Alecrim ◽  
Douglas Vieira Thomaz ◽  
Isaac Yves Lopes Macêdo ◽  
...  

Diclofenac (DIC) is a non-steroidal anti-inflammatory drug of wide use around the world. Electroanalytical methods display a high analytical potential for application in pharmaceutical samples but the drawbacks concerning electrode fouling and reproducibility are of major concern. Henceforth, the aim of this work was to propose the use of alternative low-cost carbon black (CB) and ionic liquid (IL) matrix to modify the surface of pencil graphite electrodes (PGE) in order to quantify DIC in raw materials, intermediates, and final products, as well as in stability assays of tablets. The proposed method using CB+IL/PGE displayed good recovery (99.4%) as well as limits of detection (LOD) of 0.08 µmol L-1 and limits of quantification (LOQ) of 0.28 µmol L−1. CB+IL/PGE response was five times greater than the unmodified PGE. CB+IL-PGE stands as an interesting alternative for DIC assessment in different pharmaceutical samples.

2007 ◽  
Vol 336-338 ◽  
pp. 939-941
Author(s):  
Yong Qiang Meng ◽  
Zhi Min Bai ◽  
Chang Hong Dai ◽  
Bao Bao Zhang

A new method for producing silicon carbide platelets with low cost and high yield was introduced. The silicon carbide platelets were synthesized by powder-heating techniques with carbon black and SiO2 powder as raw materials and CoCl2 as catalyst. The starting mixtures were heated at a temperature in the range of 1800-2000°C for the duration of about 2-4h to produce substantially completely unagglomerated silicon carbide platelets with a thickness of 5-20μm and the average diameter of 50-200μm. Compared to the conventional heating, the powder-heating technique is advantageous of less investment on equipment, easy to manufacture and convenient to operate. Furthermore, it is very suitable for realizing the scaled production because of the lower synthesizing temperature, shorter reaction time and greater output.


2021 ◽  
Vol 1 ◽  
pp. 2971-2980
Author(s):  
Clio Dosi ◽  
Nicolò Cocchi ◽  
Matteo Vignoli

AbstractAgainst a pandemic, speed is crucial, and open innovation (OI) helps to empower the human capital distributed around the world to tackle the disease and to launch rapid testing of possible solutions. This article aims at showing an OI program - called “TEN” Transform Emergency Now! - ideated and developed by the University of Bologna to identify, design, and implement useful solutions to tackle specific issues coming from pandemics. With an action research-innovation management approach, the University developed two iterations to identify what elements to take into account to define a program that works for this effort. In TEN, Frugal Innovation (FI) principles were injected in a 10 days hackathon to favor the use of locally available resources and raw materials and exclude non-essential features. Results show that Frugality can become an element of OI by (1) pushing the team towards basic functionality and minimal features of the solutions and low-cost implementation. (2) Designing, in parallel with the solution, an ‘implementation network’, with a specific process design and program's organizational perspective. We believe that TEN has the potential to be an OI approach designed for emergencies.


Cerâmica ◽  
2016 ◽  
Vol 62 (363) ◽  
pp. 242-248 ◽  
Author(s):  
F. Zenikheri ◽  
A. Harabi ◽  
B. Boudaira ◽  
F. Bouzerara ◽  
A. Guechi ◽  
...  

Abstract Porous ceramics of good quality cost a lot in the world market, which has limited their use in developing countries. This is why this work was mainly devoted to prepare low-cost and good quality ceramics, using kaolin (DD2 type) and calcite (CaCO3) available in abundance in Algeria. Based on previous results, 28 wt% CaCO3 ceramic was selected. The presence of CaCO3 favors to achieve porous samples characterized by a high percentage of porosity due to the CO2 release and CaO formation during its calcination at about 700 °C. The choice of these raw materials is based on their natural abundance (low price). It has been found that the samples had interesting characteristics: average pore size between 2.87 and 6.50 μm and porosity between 53 and 57%. It has also been found that the manufactured membrane supports are mainly constituted of gehlenite and anorthite phases. Moreover, the pore size distribution was mono-modal type. The surface and cross-section morphologies observed through a scanning electron microscope were also homogeneous and do not present any possible macro-defects (cracks, etc.).


2005 ◽  
Vol 10 (4) ◽  
pp. 737-756
Author(s):  
Christian Stoffaes

Contemporary developments are characterized at the same time by a series of economic changes and by a crisis in, international political leadership. The extent to which the density of economic relations has increased is such that a world economy is now a reality. The growing internationalization of the processes of trade and production and the internationalization of business strategies have resulted in a concentration and an oligopolization of the world economy. In the majority of the key development sectors, about ten firms at the most share the market, inducing by that very fact, an increase in specialization and, therefore, the search for a new international division, of work. The age of low-cost energy and raw materials that ensured a marked advantage to the industrialization nations seems at an end. The arrival on world markets of Third-world countries in the process of industrialization constitutes a new challenge. International competition is situated squarely in the economic field and the new international hierarchy is being established in accordance with the capacity of each participant to adapt to these new givens.


2008 ◽  
Vol 368-372 ◽  
pp. 824-826 ◽  
Author(s):  
Yong Qiang Meng ◽  
Chang Hong Dai ◽  
Zu Wei Song

A new method for producing silicon carbide platelets with low cost and high yield was introduced. The silicon carbide platelets were synthesized by double-heating technique with carbon black and SiO2 powder as raw materials without using any catalysts. The starting mixtures were heated at a temperature in the range of 1800-2000°C for the duration of about 2-4h to produce substantially completely unagglomerated silicon carbide platelets with the thickness of 5-15μm and the average diameter of 50-150μm. Compared to the conventional heating, double-heating technique has different heating mechanism and has advantages of less investment for equipment, easy to manufacture and convenient to operate. Furthermore, it is very suitable for realizing the scaled production because of the lower synthesizing temperature, shorter reaction time and greater output.


Author(s):  
Mahesh K. Joshi ◽  
J.R. Klein

The role of emerging markets is changing in the twenty-first century, from the traditional provider of low-cost, labor-intensive goods to a global growth engine. These emerging economies are growing at double the rate of advanced economies because of technology and global connectivity. Traditionally they have been big exporters of commodities and raw materials to the rest of the world. The export of commodities has contributed significantly to the development of industrial and physical infrastructure in many countries around the world. However, emerging markets are also lucrative markets and an important source of growth for many international companies as they export their products or increase their presence in these markets by opening subsidiaries or through joint venture mechanisms. Today these markets are coming into their own, moving from sole source exporters feeding the world’s growth to becoming increasingly significant normative economic members of the global family.


Author(s):  
Lina Yurievna Lagutkina

The author of the article discloses the prospects of development of the world feed production for aquaculture based on the analysis of key innovative technological and market trends. The author specifies that shortage, high cost, low ecological compatibility of traditional raw materials - fish flour - are among major limiting factors in the development of production of feeds for aquaculture. This fact, in turn, limits sustainable development of aquaculture both in Russia, and in the world in general. The article presents the overview of a current status of the world industry of feed production in aquaculture, where the regional situation is studied, as well. For the first time, there is given the outlook of innovative technologies in feed production based on the alternative sources of protein (on the example of projects of leading aquabiotechnological companies) which will determine industry’s objectives for the mid-term perspective.


Author(s):  
В.Н. СУРОВЦЕВ ◽  
Е.Н. ПАЮРОВА

Проанализированы проблемы на рынке молока и молочных продуктов России в условиях глобального экономического кризиса: перепроизводство молока в основных странах-экспортерах, снижение закупочных цен на сырое молоко, снижение цен на биржевые товары в мире и России в 2020 году, тренд на уменьшение спроса на молочные продукты на мировом рынке в среднесрочном периоде, снижение общего спроса на молочные продукты на внутрироссийском рынке при падении реальных доходов населения, изменение структуры потребления. Проведена оценка новых возможностей и угроз для развития отрасли: со стороны потребителей — рост цен на продовольствие, снижение доходов; с позиции производителей молока — снижение закупочных цен, рост требований к сырью для производства продукции с увеличенными сроками годности, дефицит рабочей силы, вероятное сокращение господдержки в результате снижения цен на углеводороды, попытки регулирования цен; со стороны перерабатывающих предприятий — сокращение спроса, снижение цен на готовую продукцию вслед за мировыми ценами. Обоснованы приоритеты инвестирования в молочном скотоводстве и основные формы совершенствования государственной поддержки отрасли, обеспечивающие эффективную адаптацию производителей молока к новым экономическим условиям, повышение устойчивости отрасли при усилении макроэкономических рисков. The article analyzes the problems in the Russian milk and dairy products market in the context of the global economic crisis: overproduction of milk in the main exporting countries, lower purchase prices for raw milk, lower prices for commodities in the world and in Russia in 2020, trend to reduce demand for dairy products on the world market in medium term, a decrease in total demand for dairy products in the Russian market with a decrease in the purchasing power of the population, a change in the structure of consumption. An assessment of new opportunities and threats to the development of the industry was carried out: on the part of consumers — rising food prices, lower incomes; from the perspective of dairy producers — reduction in purchase prices, increased requirements for raw materials for the production of products with extended periods, labor shortages, the likely reduction in state support as a result of lower prices for hydrocarbons, attempts to regulate prices; on the part of processing enterprises — reduction of demand, reduction of prices for finished goods following world prices. The investment priorities in dairy cattle breeding and the main forms of improving state support for the industry, ensuring the effective adaptation of milk producers to new economic conditions, increasing the sustainability of the industry with increasing macroeconomic risks, are substantiated.


2020 ◽  
Vol 4 (1) ◽  
pp. 41-48
Author(s):  
Teodoro Astorga Amatosa ◽  
Michael E. Loretero

Bamboo is a lightweight and high-strength raw materials that encouraged researchers to investigate and explore, especially in the field of biocomposite and declared as one of the green-technology on the environment as fully accountable as eco-products. This research was to assess the technical feasibility of making single-layer experimental Medium-Density Particleboard panels from the bamboo waste of a three-year-old (Dendrocalamus asper). Waste materials were performed to produce composite materials using epoxy resin (C21H25C105) from a natural treatment by soaking with an average of pH 7.6 level of sea-water. Three different types of MDP produced, i.e., bamboo waste strip MDP (SMDP), bamboo waste chips MDP (CMDP) and bamboo waste mixed strip-chips MDP (MMDP) by following the same process. The experimental panels tested for their physical-mechanical properties according to the procedures defined by ASTM D1037-12. Conclusively, even the present study shows properties of MDP with higher and comparable to other composite materials; further research must be given better attention as potential substitute to be used as hardwood materials, especially in the production, design, and construction usage.


2019 ◽  
Author(s):  
Yu Wang ◽  
Nachuan Yang ◽  
Yi Shuai ◽  
Yunpeng Zhang ◽  
Kanghua Chen

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