scholarly journals Management of Aedes aegypti using green silver nanoparticles and botanical extracts

2020 ◽  
Vol 4 (1) ◽  
Author(s):  
Hassan Saeed ◽  
Muhammad Muhammad Tariq ◽  
Asim Gulzar ◽  
Zia-ur-Rehman Mashwani ◽  
Muhammad Safian Bajwa
Keyword(s):  
Silver Nanoparticles ◽  
Aedes Aegypti ◽  
Plant Extracts ◽  
Negative Impact ◽  
The Other ◽  
Lc50 Value ◽  
Development Of Resistance ◽  
Other Hand ◽  
Botanical Extracts

The excessive use of insecticides has led to development of resistance in Aedes aegypti and negative impact on environment and non-target organisms. To overcome these problems, emphasis is being laid for alternatives, therefore, in the present study, the toxicity of eight plant extracts and their green synthesized nanoparticles were evaluated against A. aegypti. Clove extracts caused the maximum mortalities of 92% and 90% of 3rd and 4th instar larvae of A. aegypti followed by ginger causing 90% and 78% mortalities respectively. On the other hand, the minimum mortalities of these larvae were caused by neem and garlic extracts. In case of green silver nanoparticles, the maximum mortalities of 3rd and 4th instar larvae of A. aegypti were caused by clove followed by ginger while the minimum mortalities were caused by nanoparticles of datura followed by garlic. All the green silver nanoparticles caused mortalities of both the instars of the mosquito above 80% with few exceptions. Datura extracts showed the minimum LC50 values after 72 hours of application followed by neem against the 3rd and 4th instar larvae of A. aegypti.  The highest LC50 value was observed in case of ginger followed by clove and eucalyptus. In case of silver nanoparticles, the minimum LC50 values after 72 hours were recorded in case of datura, neem and garlic while the values were the maximum in case of clove and ginger. The LC50 values decreased with the passage of time.

scholarly journals Application of Plant Extracts in Micropropagation and Cryopreservation of Bleeding Heart: An Ornamental-Medicinal Plant Species

Agriculture ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 542
Author(s):  
Dariusz Kulus ◽  
Natalia Miler
Keyword(s):  
Tissue Culture ◽  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Plant Extracts ◽  
The Other ◽  
White Gold ◽  
Natural Extracts ◽  
Other Hand ◽  
The Impact

Lamprocapnos spectabilis (L.) Fukuhara (bleeding heart) is valued both in the horticultural and pharmaceutical markets. Despite its great popularity, information on the in vitro tissue culture technology in this species is limited. There is also little knowledge on the application of plant extracts in the tissue culture systems of plants other than orchids. The aim of this study is to compare the utility of traditional plant growth regulators (PGRs) and natural extracts—obtained from the coconut shreds, as well as oat, rice, and sesame seeds—in the micropropagation and cryopreservation of L. spectabilis ‘Gold Heart’ and ‘White Gold’. The biochemical analysis of extracts composition is also included. In the first experiment related to micropropagation via axillary buds activation, the single-node explants were cultured for a 10-week-long propagation cycle in the modified Murashige and Skoog medium fortified either with 1.11 µM benzyladenine (BA) and 1.23 µM indole-3-butritic acid (IBA) or with 10% (v/v) plant extracts. A PGRs- and extract-free control was also considered. In the cryopreservation experiment, the same 10% (v/v) extracts were added into the medium during a seven-day preculture in the encapsulation-vitrification cryopreservation protocol. It was found that the impact of natural additives was cultivar- and trait-specific. In the first experiment, the addition of coconut extract favoured the proliferation of shoots and propagation ratio in bleeding heart ‘Gold Heart’. Rice extract, on the other hand, promoted callus formation in ‘White Gold’ cultivar and was more effective in increasing the propagation ratio in this cultivar than the conventional plant growth regulators (4.1 and 2.6, respectively). Sesame extract suppressed the development of the explants in both cultivars analysed, probably due to the high content of polyphenols. As for the second experiment, the addition of plant extracts into the preculture medium did not increase the survival level of the cryopreserved shoot tips (sesame and oat extracts even decreased this parameter). On the other hand, coconut extract, abundant in simple sugars and endogenous cytokinins, stimulated a more intensive proliferation and growth of shoots after rewarming of samples. Analysing the synergistic effect of conventional plant growth regulators and natural extracts should be considered in future studies related to L. spectabilis.

Effects of Concrete Compositions on the Elastic Modulus

2021 ◽  
Vol 322 ◽  
pp. 41-47
Author(s):  
Rudolf Hela ◽  
Lenka Bodnárová ◽  
Klára Křížová
Keyword(s):  
Compressive Strength ◽  
Elastic Modulus ◽  
Negative Impact ◽  
The Other ◽  
Technological Factors ◽  
Factors Influencing ◽  
Other Hand ◽  
Eurocode 2 ◽  
Compressive Strength Of Concrete ◽  
Reducing Costs

The paper comments on the influence of various technological factors influencing the values of elastic modulus. Today, the composition of concrete combines the classic input components with the significant use of mixed cements, active admixtures and superplasticizers in order to achieve the required compressive strength of concrete and durability while reducing costs. On the other hand, the composition of these concretes has a negative impact on the elastic modulus which are significantly lower than the values derived from compressive strength in Eurocode 2. At the end of the article is a list of measures that are a prerequisite for obtaining the required concrete elastic modulus.

Digital Media and Memory Balkanization

2021 ◽  
Author(s):  
Francis L.F. Lee ◽  
Joseph M. Chan
Keyword(s):  
Social Media ◽  
Hong Kong ◽  
Collective Memory ◽  
Digital Media ◽  
Negative Impact ◽  
The Other ◽  
Other Hand ◽  
Political Forces ◽  
The One ◽  
The Impact

Chapter 8 discusses the impact of digital media on collective memory. The chapter examines both the positive and negative impact of digital and social media. On the one hand, the analysis notes how digital media provided the channels for memory mobilization and the archives for memory transmission. On the other hand, the analysis examines the problematics of memory balkanization. It explicates how political forces have shaped the development of digital and social media in Hong Kong and how competing representations of the Tiananmen Incident and commemoration activities are articulated and reinforced within distinctive memory silos.

Monte Carlo simulation of proton therapy using bio-nanomaterials

2016 ◽  
Vol 15 (3) ◽  
pp. 290-295
Author(s):  
Chafika Belamri ◽  
Anis Samy Amine Dib ◽  
Ahmed H. Belbachir
Keyword(s):  
Monte Carlo Simulation ◽  
Gold Nanoparticles ◽  
Silver Nanoparticles ◽  
Monte Carlo ◽  
Cancer Therapy ◽  
Proton Therapy ◽  
Platinum Nanoparticles ◽  
The Other ◽  
Other Hand

AbstractIntroductionIn recent years, there has been a spectacular development in nanomedicine field with new nanoparticles for diagnosis and cancer therapy. Although most researchers have been always interested in gold nanoparticles (GNPs)Materials and methodsIn the present work we present a comparison between the use of bio-nanomaterials in proton therapy.ConclusionConsequently, our results show that platinum nanoparticles (PtNPs) present an interesting advantages comparing with GNPs and silver nanoparticles. On the other hand, the use of PtNPs facilitates in a considerable way the proton therapy.

scholarly journals Oligopsony-Oligopoly The perfect imperfect competition

Nova Scientia ◽  
2014 ◽  
Vol 6 (11) ◽  
pp. 346
Author(s):  
Carlos Encinas-Ferrer
Keyword(s):  
Imperfect Competition ◽  
Negative Impact ◽  
The Other ◽  
Competitive Market ◽  
Double Negative ◽  
Effective Demand ◽  
Other Hand

Oligopoly and oligopsony have been studied extensively. However, the dual figure of the oligopsonistic-oligopolistic intermediary has not been. This dual personality has a double negative impact on the market, on one hand reduces the demand to producers who face a competitive market, lowering prices as buyers, and on the other hand reducing its offer by raising the prices as sellers. In this way, their benefits are increased buying cheap and selling expensive, affecting effective demand of the consumer and the effective supply of the initial producer.

scholarly journals Features of Reforming Procedural Legislation as an Obstacle to the Convergence of Criminal, Civil, Arbitration and Administrative Processes

2021 ◽  
Vol 17 (2) ◽  
pp. 64-69
Author(s):  
A. R. Sharipova
Keyword(s):  
Negative Impact ◽  
Criminal Procedure ◽  
The Other ◽  
Criminal Process ◽  
Procedural Law ◽  
Other Hand ◽  
The One

The negative impact of the existing legislative approach to reforming the criminal process on the possibility of its convergence with other procedural branches is considered. The unjustified separation of bills on reforming the CPC within the framework of unified procedural transformations is noted. Separate legislative work on the criminal process, on the one hand, and arbitration, civil and administrative, on the other hand, leads to the emergence of additional unjustified differences in the normative consolidation of universal institutions. Specific examples of undesirable divergence of lawsuits caused by uncoordinated lawmaking are given. The absence of convergence of procedural law among the goals of both sectoral, in particular, criminal procedure policy, and judicial policy is noted. The necessity of developing the concept and directions of judicial procedural policy is substantiated.

scholarly journals http://habibiaislamicus.com/index.php/hirj/article/view/67

2021 ◽  
Vol 5 (2) ◽  
pp. 161-178
Author(s):  
Farhana Niazi ◽  
Keyword(s):  
Large Scale ◽  
Negative Impact ◽  
Research Paper ◽  
The Other ◽  
Other Hand ◽  
Significant Research ◽  
Rape Survivor ◽  
Crimes Against Women ◽  
Near Future ◽  
Islamic Society

Crimes against women include many crimes, but this research paper focuses on rape cases and seeks to find out when television channels cover rape cases, what are the consequences of it, how they affect the Islamic society and what has been said about it in the light of Qur'an and Hadith? This topic is also important because no significant research paper on this subject has been written in Pakistan before and no clear picture has emerged. The pamphlet assumes that the broadcasting of incidents of rape of women on television channels is having a negative impact on the society, which has been investigated in every possible way. In this regard, various incidents of rape from 2012 to 2014 have been studied in the broadcasts of two television channels. A survey was also conducted to gauge public opinion, which revealed a variety of views. The survey included all kinds of questions that cover the entire subject. On the other hand, an interview with a victim has been conducted to find out the opinion of the rape survivor; while an interview with an individual associated with electronic media and a psychologist is also part of this pamphlet. The study found that news channels do not pay attention to a single statement while covering rape incidents, while on the other hand, the identity of the victim is revealed, which is also denied by our religion Islam and the Qur'an. According to the findings, more research is needed in the near future, and television channels need to collaborate with researchers and give them access to content. Similarly, there is a need for a large-scale comprehensive study in which data from all over the country is collected so that a complete picture can emerge.

scholarly journals Whole-Farm Revenue Protection as a Factor of Economic Stability in Crop Production

2020 ◽  
Vol 12 (16) ◽  
pp. 6349
Author(s):  
Željko Kokot ◽  
Todor Marković ◽  
Sanjin Ivanović ◽  
Maja Meseldžija
Keyword(s):  
Crop Production ◽  
Negative Impact ◽  
The Other ◽  
Plant Production ◽  
Market Prices ◽  
Market Risks ◽  
Other Hand ◽  
Management Measures ◽  
Revenue Insurance ◽  
Insurance Model

Crop production is largely unprotected and exposed to a great number of production factors. On the other hand, farmers are exposed to fluctuations in the market prices of their products every year, which often has a negative impact on the profits made. There are various risk management measures in plant production, and insurance is certainly one of the most effective instruments. One of the recent insurance models is Whole-Farm Revenue Insurance (WFRP), which is an American insurance model that has been applied since 2015. The essence of WFRP is to ensure that all crops on the farm are secured against production and market risks with only one policy. The aim of the research in this paper is to present WFRP as an entirely new model of revenue insurance on the example of a typical Serbian farm specializing in crop production. The WFRP model works by determining the insured revenue before the start of the production year. If at the end of the production year, for any reason, the realized revenue falls below the level of insured revenue, the farmer is entitled to indemnification. Due to the drought that hit the region where the analyzed farm is located, the yields were reduced, and thus the expected revenue was also reduced, and the farmer was entitled to damages of $5697. On the other hand, it is the farmer’s obligation to pay $373 to the insurer as a risk transfer fee. The authors proved that even such complex insurance models can be applied in countries such as Serbia, where awareness of the importance of insurance of agricultural production is still not developed.

scholarly journals Differences in the resistant variants of Enterobacter cloacae selected by extended-spectrum cephalosporins.

1996 ◽  
Vol 40 (5) ◽  
pp. 1289-1293 ◽  
Author(s):  
J C Fung-Tomc ◽  
E Gradelski ◽  
E Huczko ◽  
T J Dougherty ◽  
R E Kessler ◽  
...  
Keyword(s):  
Enterobacter Cloacae ◽  
Fresh Medium ◽  
The Other ◽  
Beta Lactamase ◽  
Development Of Resistance ◽  
Extended Spectrum ◽  
Other Hand ◽  
Porin Protein ◽  
Very High ◽  
Serial Dilutions

The rates of development of resistance to ceftriaxone, ceftazidime, cefepime, and cefpirome in 10 strains of Enterobacter cloacae were determined by daily transfer for 7 days to fresh medium containing twofold serial dilutions of the antibiotics. Development of resistance to ceftriaxone was the most rapid; this was followed by ceftazidime, cefpirome, and cefepime. Resistant variants selected by ceftriaxone and ceftazidime were cross-resistant and produced very high levels of beta-lactamase. On the other hand, resistant variants selected by cefepime and cefpirome often had moderately high levels of beta-lactamase and diminished levels of the 39- to 40-kDa porin protein.

scholarly journals Simulation software VENTSIM™ the influence of implementation of work abandoned sealings ventilation of an underground coal mine

2018 ◽  
pp. 5-13 ◽  
Author(s):  
Moisés Oswaldo Bustamante-Rúa ◽  
Alan José Daza-Aragón ◽  
Pablo Bustamante-Baena
Keyword(s):  
Working Conditions ◽  
Coal Mine ◽  
Negative Impact ◽  
Simulation Software ◽  
Air Injection ◽  
The Other ◽  
Economic Losses ◽  
Equivalent Resistance ◽  
Underground Coal Mine ◽  
Other Hand

It is common to find that in some mines in the coalfield of Sinifaná not exercise proper control over sealings and therefore the air can make tours of areas that do not require to be ventilated at the mine. This has a major negative impact, since often the air does not reach to operating fronts of the adequately form and makes it impossible for people can have appropriate working conditions; on the other hand it generated highly relevant economic losses related to the air injection to abandoned works. With the present study is pretend to assess how is the influence of the sealings in the behavior of the mine, in the equivalent resistance and the flows to the work fronts, this in order to establish in the case of the mine selected, which sealings can be implemented and thus optimize ventilation in the mine.

Sign in / Sign up

Export Citation Format

Share Document