scholarly journals The effectiveness of Lemna perpusilla as phytoremediation agent in giant gourami culture media on 3 ppt

2015 ◽  
Vol 14 (2) ◽  
pp. 122 ◽  
Author(s):  
Alexander Burhani Marda ◽  
Kukuh Nirmala ◽  
Enang Harris ◽  
Eddy Supriyono
Keyword(s):  
Animal Feed ◽  
Culture Media ◽  
Water Salinity ◽  
Efficiency Ratio ◽  
Nitrogen And Phosphorus ◽  
Nitrite Level ◽  
Feed Efficiency Ratio ◽  
The Media ◽  
The Impact ◽  
Lemna Perpusilla

<p class="NoParagraphStyle" align="center"><strong>ABSTRACT</strong></p><p class="NoParagraphStyle" align="center"><strong> </strong></p><p class="NoParagraphStyle">The wasted from feed and feces containt nitrogen and phosphorus can decreased fertility and feability water quality. <em>Lemna perpusilla</em> (duckweed) is prospective to use as an agent of phytoremediation of organic waste and can used as animal feed because it has high protein content. Meanwhile water salinity could be accelerate the growth of giant gourami. The aim of this research was to analyze the ability of <em>L. perpusilla</em> in absorbing nutrients nitrogen and phosphorus in water salinity of 3 ppt. The research was conducted four treatments and three replications. The treatments were A (<em>L. perpusilla</em> and 3 ppt salinity), B (<em>L. perpusilla</em>, 3 ppt salinity and filter), C (<em>L. perpusilla</em>, 3 ppt salinity and aeration), and D (<em>L. perpusilla</em>, 3 ppt salinity, filter and aeration). Experiment were carried in aquaria 50×33×50 cm<sup>3</sup> in size with density of gourami fish 150/49.5 L for one month. The results showed that the ability of <em>L. perpusilla</em> to absorb N and P decreased from the beginning of the study due to lack of nutrient source of N and P in the aquaculture media, but increased because the impact of the feeding and  metabolism of the gourami. There was no different treatment effect for decreased N and P (P&gt; 0.05). The highest nitrite level was found in D treatment, it means that <em>L. perpusilla</em> not be able to absorb  N and P in the media 3 ppt salinity. However, the addition of 3 ppt salinity gives the best results for the survival rate and feed efficiency ratio.</p><p class="NoParagraphStyle"> </p><p class="NoParagraphStyle">Keywords: phytoremediation, <em>Lemna perpusilla</em>, giant gourami fish, nitrogen and phosphorus</p><p class="NoParagraphStyle"> </p><p class="NoParagraphStyle" align="center"><strong> </strong></p><p class="NoParagraphStyle" align="center"><strong>ABSTRAK</strong></p><p class="NoParagraphStyle" align="center"><strong> </strong></p><p class="NoParagraphStyle">Limbah pakan dan feses yang mengandung nitrogen dan fosfor dapat menyebabkan penurunan kesuburan dan kelayakan kualitas air.<em> Lemna perpusilla</em> (<em>duckweed</em>) baik digunakan sebagai agen fitoremediasi organik untuk limbah dan dapat digunakan sebagai pakan hewan karena mengandung protein yang tinggi, sementara media bersalinitas mampu mempercepat pertumbuhan ikan gurami. Tujuan dari penelitian ini adalah untuk menganalisis kemampuan <em>L. perpusilla</em> dalam mengabsorbsi nutrisi nitrogen dan fosfor pada air bersalinitas 3 ppt. Penelitian ini terdiri atas lima perlakuan dan tiga ulangan. Perlakuan yang diberikan adalah A (<em>L. perpusilla</em> dan salinitas 3 ppt), B (<em>L. perpusilla</em>, salinitas 3 ppt dan filter), C (<em>L. perpusilla</em>, salinitas 3 ppt dan aerasi), dan D (<em>L. perpusilla</em>, salinitas 3 ppt, aerasi dan filter). Akuarium yang digunakan berukuran 50×33×50 cm<sup>3</sup> dengan kepadatan ikan gurami 150 ekor/49,5 L dan waktu pemeliharaan selama satu bulan. Hasil penelitian ini menunjukkan bahwa kemampuan <em>L. perpusilla</em> menyerap limbah N dan P berkurang dari awal penelitian karena kurangnya sumber nutrisi N dan P pada media pemeliharaan, namun beranjak meningkat yang berdampak dari adanya pemberian pakan dan sisa metabolisme dari ikan gurame. Tidak ada perlakuan yang berpengaruh terhadap pengurangan N dan P (P&gt;0,05). Nilai nitrit tertinggi terdapat pada perlakuan D, hal ini berarti bahwa <em>L. perpusilla</em> tidak mampu untuk menyerap limbah N dan P pada media bersalinitas 3 ppt. Namun penambahan salinitas 3 ppt memberikan hasil yang terbaik bagi derajat kelangsungan hidup ikan gurami dan efisiensi pakan.</p><p class="NoParagraphStyle"> </p><p class="NoParagraphStyle">Kata kunci: fitoremediasi, <em>Lemna perpusilla</em>, ikan gurami, nitrogen dan fosfor</p><p> </p>

The impact of distinct culture media inLeishmania infantumbiology and infectivity

Parasitology ◽  
2013 ◽  
Vol 141 (2) ◽  
pp. 192-205 ◽  
Author(s):  
NUNO SANTARÉM ◽  
JOANA CUNHA ◽  
RICARDO SILVESTRE ◽  
CÁTIA SILVA ◽  
DIANA MOREIRA ◽  
...  
Keyword(s):  
Cell Cycle Progression ◽  
Culture Media ◽  
Rational Approach ◽  
Cycle Progression ◽  
The Media ◽  
Parasite Biology ◽  
Basic Characteristics ◽  
The Impact

SUMMARYAn ideal culture medium forLeishmaniapromastigotes should retain the basic characteristics of promastigotes found in sandflies (morphology and infectivity). Furthermore, the media should not create a bias in experimental settings, thus enabling the proper extrapolation of results. To assess this we studied several established media for promastigote growth. We analysed morphology, viability, cell cycle progression, metacyclic profile, capacity to differentiate into axenic amastigotes and infectivity. Furthermore, using a rational approach from the evaluated media we developed a simple serum-free medium (cRPMI). We report that parasites growing in different media present different biological characteristics and distinctin vitroandin vivoinfectivities. The developed medium, cRPMI, proved to be a less expensive substitute for traditional serum-supplemented media for thein vitromaintenance of promastigotes. In fact, cRPMI is ideal for the maintenance of parasites in the laboratory, diminishing the expected loss of virulence over time typical of the parasite cultivation. Ultimately this report is a clear warning that the normalization of culture media should be a real concern in the field as media-specific phenomena are sufficient to induce biological bias with consequences in infectivity and general parasite biology.

scholarly journals Laboratory studies of the algaecide GreenTD: stability, algaecidal activity and reduction of microcystin production

2021 ◽  
Vol 64 (1) ◽  
Author(s):  
Il Kyu Cho ◽  
Jae Ung Seol ◽  
Md. Musfiqur Rahman ◽  
Dong-Gi Lee ◽  
Hyeongkyu Son ◽  
...  
Keyword(s):  
Liquid Chromatography ◽  
Harmful Algal Blooms ◽  
Algal Blooms ◽  
Limit Of Detection ◽  
Culture Media ◽  
Nitrogen And Phosphorus ◽  
Safety Level ◽  
Blue Green Algae ◽  
Microcystin Production ◽  
The Media

AbstractGreenTD (Dichlorobenzyl derivative, MW 362.17) is a new dichlorobenzyl derivative algaecide. It is effective and selective against harmful algal blooms (HABs). HABs cause serious problems for public health and fishery industries. Algae that cause HABs include Microcystis spp., Anabaena spp., and Aphanizomenon spp. Blooms of toxin-producing Microcystis aeruginosa occur regularly in fresh water where is rich in nitrogen and phosphorus nutrients. Environmental fate studies are needed to investigate the degradation of GreenTD. In the present study, we studied the persistence of GreenTD (90% aqueous solution) in water and toxic effects GreenTD on M. aeruginosa and reduction of microcystin production in the culture media. GreenTD was added in the water pots and microcystis media tubes at levels of 25 g/0.1 ha (0.5 mg/kg) and 50 g/0.1 ha (1.0 mg/kg). Samples were collected after 1, 3, 5, 7 and 14 days. The residues of GreenTD and microcystins in water and the media were determined using high performance liquid chromatography-diode array detection and ultra-performance liquid chromatography-tandem mass spectrometry, respectively. The half-life of GreenTD at concentrations of 0.5 and 1.0 mg/kg was 4.5 and 3.6 days, respectively. This result presents a safety level suitable for the acceptable guideline of water residue. The average recoveries of microcystins RR, YR, LR, and LA were 106–115%, 103–110%, 96–105% and 89–113% in the microcystis media, respectively. The limit of detection of (LOD) the microcystins was 0.1 µg/kg. No microcystins in the media were detected at the LOD (0.1 µg/kg). GreenTD at concentrations of 0.2 and 0.5 µg/kg had a 100% of control efficacy of M. aeruginosa. No growth of the blue-green algae was observed after 14 days of GreenTD application.

scholarly journals The impact of sample processing and media chemistry on the culturable diversity of bacteria isolated from a cave

2020 ◽  
Vol 49 (3) ◽  
pp. 209-220
Author(s):  
Katey Bender ◽  
◽  
Katelyn Glover ◽  
Alexander Archey ◽  
Hazel Barton ◽  
...  
Keyword(s):  
Culture Media ◽  
Radical Scavenging ◽  
Community Interactions ◽  
Functional Roles ◽  
Molecular Approaches ◽  
Representative Species ◽  
Plate Counts ◽  
The Media ◽  
Metabolic Strategies ◽  
The Impact

Although molecular approaches can identify members of microbial communities in the environment, genomic information does not necessarily correlate with environmental phenotype. Understanding functional roles can be done by cultivating representative species, yet the culturablility of bacteria from caves remains low, at 0.02%, limiting our understanding of microbial community interactions and processes. We have investigated several factors influencing culturability of bacteria from a single sample location in Maxwelton Sink Cave, WV, USA. Extended incubation of inoculated plates showed a significant increase in colony counts from two to four weeks, indicating that extended incubations increase culturability. There were no significant differences in plate counts or diversity measures when the sample was suspended in different buffers prior to cultivation, while samples plated immediately after collection demonstrated higher culturability. Although supplementing the media with antibiotics reduced colony counts and cultured diversity, these plates did appear to contain a higher proportion of slow-growing oligotrophs. Finally, among a selection of culture media used, pyruvate agar showed the highest culturability and bacterial diversity, which may be a result of the oxygen radical scavenging effects of pyruvate. By identifying methods that improve culturable diversity, we hope to further understand the roles played by bacteria in cave communities, and test hypotheses that are best assessed using culture-based methods, such as screening for bioactive compounds or confirming in situ metabolic strategies.

The More Control, the Better?

2014 ◽  
Vol 26 (2) ◽  
pp. 81-91 ◽  
Author(s):  
Jeeyun Oh ◽  
Mun-Young Chung ◽  
Sangyong Han
Keyword(s):  
Mixed Design ◽  
Negative Effects ◽  
Story Structure ◽  
Content Type ◽  
High User ◽  
User Control ◽  
Rigorous Research ◽  
Control Versus ◽  
The Media ◽  
The Impact

Despite of the popularity of interactive movie trailers, rigorous research on one of the most apparent features of these interfaces – the level of user control – has been scarce. This study explored the effects of user control on users’ immersion and enjoyment of the movie trailers, moderated by the content type. We conducted a 2 (high user control versus low user control) × 2 (drama film trailer versus documentary film trailer) mixed-design factorial experiment. The results showed that the level of user control over movie trailer interfaces decreased users’ immersion when the trailer had an element of traditional story structure, such as a drama film trailer. Participants in the high user control condition answered that they were less fascinated with, absorbed in, focused on, mentally involved with, and emotionally affected by the movie trailer than participants in the low user control condition only with the drama movie trailer. The negative effects of user control on the level of immersion for the drama trailer translated into users’ enjoyment. The impact of user control over interfaces on immersion and enjoyment varies depending on the nature of the media content, which suggests a possible trade-off between the level of user control and entertainment outcomes.

The impact of news coverage of Russia in the media on export—import activities

2019 ◽  
pp. 30-44
Author(s):  
Elena A. Fedorovau ◽  
Svetlana O. Musienko ◽  
Igor S. Demin ◽  
Fedor Yu. Fedorov ◽  
Dmitriy O. Afanasyev
Keyword(s):  
News Coverage ◽  
The Media ◽  
The Impact

Markets for Purchased Farm Inputs

2005 ◽  
pp. 60-71
Author(s):  
E. Serova ◽  
O. Shick
Keyword(s):  
Agricultural Policy ◽  
Financial Constraints ◽  
Information Sources ◽  
Animal Feed ◽  
Government Policies ◽  
Market Institutions ◽  
Policy Makers ◽  
Government Organizations ◽  
The Impact ◽  
Farm Inputs

Russian policy makers argue that agriculture suffers from decapitalization due to financial constraints faced by producers. This view is the basis for the national agricultural policy, which emphasizes reimbursement of input costs and substitutes government and quasi-government organizations for missing market institutions. The article evaluates the availability of purchased farm inputs, the efficiency of their use, the main problems in the emergence of market institutions, and the impact of government policies. The analysis focuses on five groups of purchased inputs: farm machinery, fertilizers, fuel, seeds, and animal feed. The information sources include official statistics and data from two original surveys.

МАРКЕТИНГОВІ АСПЕКТИ ФУНКЦІОНУВАННЯ ЛІТЕРАТУРНИХ КОНКУРСІВ ТА ПРЕМІЙ

2020 ◽  
pp. 90
Author(s):  
O. Bondar
Keyword(s):  
Publishing House ◽  
Target Audience ◽  
Point Of View ◽  
Information Support ◽  
Literary Field ◽  
Non Profit ◽  
Functional Aspects ◽  
The Media ◽  
Literary Prizes ◽  
The Impact

<p><em>In this study, I have collected and summarized the functional aspects of a literary prize, contest, and rating, which indicate their affiliation with the marketing complex of the publishing house for the first time. For this purpose, I have analyzed and summarized the common concepts of the functioning of literary prizes and contests as advertising tools for publishing activity. Because the previous studies are only focused on the fact of the impact of the prize on the promotion of editions but do not explain it, these aspects have been considered and introduced by me from the book production’s point of view. I investigated that the prizes and the contests in the literary field are effective marketing tools, which meet many publisher’s needs at the same time and can be considered a non-profit form of capital. I have reviewed the works of other authors, who accept that the economic success of the book is rising if the author is a winner of the literary prize or contest. I have found out that the book prize activates the demand for the book, and the literary contest is a tool to track the reader’s reaction to a future publication. In this way, literary prizes and contests can be considered as a way of conducting a marketing dialogue with the target audience. I have focused on the information support of literary national and international prizes and contests by the media, which attracts attention to the book and forms the reader’s interest. The literary prizes and contests are also considered as a way of exploring trends and their changes, familiarization the popular genres among the target audience and fixation the current choice of modern readers. Literary prizes and contests motivate the authors to improve their literary excellence, are the source of new authors and works, and assist in increasing sales of books. However, further research is recommended.</em></p><strong><em>Key words:</em></strong><em> book prize, book rating, literary contest, literary prize, functions of the literary prizes.</em>

The Process of Globalization and Its Impact on Media

2016 ◽  
Vol 1 (4) ◽  
pp. 150
Author(s):  
Veton Zejnullahi
Keyword(s):  
New Technology ◽  
World Order ◽  
Modern Society ◽  
Media Access ◽  
Four Corners ◽  
The World ◽  
The Media ◽  
The Republic ◽  
Human Eyes ◽  
The Impact

The process of globalization, which many times is considered as new world order is affecting all spheres of modern society but also the media. In this paper specifically we will see the impact of globalization because we see changing the media access to global problems in general being listed on these processes. We will see that the greatest difficulties will have small media as such because the process is moving in the direction of creating mega media which thanks to new technology are reaching to deliver news and information at the time of their occurrence through choked the small media. So it is fair to conclude that the rapid economic development and especially the technology have made the world seem "too small" to the human eyes, because for real-time we will communicate with the world with the only one Internet connection, and also all the information are take for the development of events in the four corners of the world and direct from the places when the events happen. Even Albanian space has not left out of this process because the media in the Republic of Albania and the Republic of Kosovo are adapted to the new conditions under the influence of the globalization process. This fact is proven powerful through creating new television packages, written the websites and newspapers in their possession.

ACOUSTIC PANEL CHICKEN FEATHER WASTE ENVIRONMENTALLY FRIENDLY

2020 ◽  
Author(s):  
Ansarullah ◽  
Ramli Rahim ◽  
Baharuddin Hamzah ◽  
Asniawaty Kusno ◽  
Muhammad Tayeb
Keyword(s):  
Animal Feed ◽  
Environmentally Friendly ◽  
Selling Price ◽  
Chicken Feather ◽  
Chicken Feathers ◽  
The Road ◽  
Feather Waste ◽  
Chicken Feather Waste ◽  
Almost All ◽  
The Impact

Chicken feathers are the result of waste from slaughterhouses and billions ofkilograms of waste produced by various kinds of poultry processing. This hal is a veryserious problem for the environment because it causes the impact of pollution. Hasmany utilization of chicken feather waste such as making komocen, accessories,upholstery materials, making brackets to the manufacture of animal feed but from theresults of this activity cannot reduce the production of chicken feathers that hiscontinuously increase every year. This is due to the fact that the selling price of chickenmeat has been reached by consumers with middle to upper economic levels. This caneasily be a chicken menu in almost all restaurants and restaurants to the food stalls onthe side of the road. An alternative way of utilizing chicken feathers is to makecomposite materials in the form of panels. Recent studies have shown that the pvacmaterial can be utilized as a mixing and adhesive material with mashed or groundfeathered composites to form a panel that can later be used as an acoustic material.The test results show that the absorption of chicken feathers and pvac glue into panelscan absorb sound well with an absorption coefficient of 0.59, light. This result is veryeconomical so it is worth to be recommended as an acoustic material. Apart from theresults of research methods carried out is one of the environmentally friendly activitiesin particular the handling of waste problems

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