scholarly journals Stability and Effectiveness of Wetting Agents in Stored Growing Media

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 839D-839
Author(s):  
Santakumari Mane ◽  
James Turner ◽  
Stanley Kostka
Keyword(s):  
Water Retention ◽  
Storage Period ◽  
Wetting Agent ◽  
Media Composition ◽  
Treatment Rate ◽  
Media Control ◽  
The Media ◽  
Wetting Agents ◽  
Media Storage ◽  
Over Time

Three soilless media of different composition (peat: vermiculite, bark: peat: vermiculite, peat: vermiculite: polystyrene) received one of three wetting agent treatments (AquaGro 160 at 60 ml or 120 ml·m–3; or AquaGro L at 120 ml·m–3) and were subsequently analyzed for wettability after storage for up to 4 months. The respective untreated media served as the controls. All media were stored in closed bags at 24 ± 4C. Water retention was greater in wetting agent-treated media than in controls. Both wetting agents facilitated uniform distribution of water in the media. Control media became more difficult to wet over time, whereas wetting agent treatments maintained uniform wettability of media throughout the storage period. Wetting agent chemistry, treatment rate, and media composition influenced wetting characteristics during media storage. All three wetting agent treatments improved wetting of the peat: vermiculite over the 4-month test period. In bark media, AquaGro 160 applied at 120 ml·m–3 enhanced wetting throughout the study. Media containing polystyrene were difficult to wet. AquaGro 160 applied at 120 ml·m–3 improved wetting for up to 2 months.

scholarly journals Wetting Characteristics of Different Peat and Peat: Bark-based Potting Media: Influence of Wetting Agents in Improving Wetting and Rewetting Performance

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 583f-584
Author(s):  
Santakumari Mane ◽  
James A. Turner
Keyword(s):  
Water Retention ◽  
Unit Volume ◽  
Initial Moisture Content ◽  
Wetting Agent ◽  
Media Composition ◽  
Potting Media ◽  
The Media ◽  
Wetting Agents ◽  
Reduced Water ◽  
Agent Treatment

Eight different peat-based or peat: bark-based potting media were evaluated for their wetting performance when treated with the media wetting agent AquaGro 2000 (2–5 oz/yd3). Upon initial irrigation, no differences in wetting uniformity were observed in seven of the eight test media regardless of their media wetting agent treatments. In four media, water retention was reduced by media wetting agent treatment, however, uniform distribution of water was achieved. AquaGro 2000 improved uniformity of initial wetting in one medium in which the initial moisture content was 6.5%. Uniformity of wetting and water retention improved with increasing wetting agent rate. All media were allowed to air dry and then were re-irrigated. Wetting agent-treated media rewet uniformly, while rewetting varied greatly in untreated media (7.5%–82.5%). Less than 50% of the mass of untreated media wet subsequent to drying. Those portions of the untreated media that did wet retained up to three times more water per unit volume compared to AquaGro 2000-treated media. AquaGro 2000 enhanced uniformity of rewetting, reduced water logging, and improved drainage at all rates (2–5 oz/yd3) tested. Media composition (peat vs. peat: bark did not affect wetting agent efficacy.

scholarly journals 829 PB 311 WETTING AGENT EFFECTS ON TURF SOIL-WATER REPELLENCY

HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 552b-552
Author(s):  
John L. Cisar ◽  
Karen E. Williams
Keyword(s):  
Soil Water ◽  
Soil Depth ◽  
Water Drop ◽  
Water Repellency ◽  
Fine Sand ◽  
Wetting Agent ◽  
Water Repellent ◽  
Soil Water Repellency ◽  
Wetting Agents ◽  
Over Time

Soil-water repellency is often a problem for turfgrass grown on sand soils. Wetting agents used to alleviate repellency often provide mixed results. We evaluated AquagroL and an experimental material (ACA 864) at 0, 7, 14, and 21ml/m2 applied monthly to tifgreen bermuda grown on a soil-water repellent Margate fine sand over 6 months. Alleviation of repellency was based upon water drop penetration time (WDPT). Wetting agents did not effect turf quality, cover, or discoloration. Wetting agents did not reduce repellency 1 month after initial application. At 2 months, ACA 864 at 21ml/m2 significantly reduced WDPT. With repeat applications, lower rates of ACA 864 provided reductions in WDPT similar to the highest rate of ACA 864, suggesting an additive effect over time. There was a decline in WDPT for all wetting agent treatments, except the control, over time. Repellency decreased with soil depth, and repeat wetting agent application reduced WDPT at lesser depth.

A Downward Spiral? A Panel Study of Misinformation and Media Trust in Chile

2021 ◽  
pp. 194016122110252
Author(s):  
Sebastián Valenzuela ◽  
Daniel Halpern ◽  
Felipe Araneda
Keyword(s):  
News Media ◽  
Panel Study ◽  
Future Research ◽  
Panel Survey ◽  
Downward Spiral ◽  
The Media ◽  
Media Trust ◽  
People’S Attitudes ◽  
Over Time

Despite widespread concern, research on the consequences of misinformation on people's attitudes is surprisingly scant. To fill in this gap, the current study examines the long-term relationship between misinformation and trust in the news media. Based on the reinforcing spirals model, we analyzed data from a three-wave panel survey collected in Chile between 2017 and 2019. We found a weak, over-time relationship between misinformation and media skepticism. Specifically, initial beliefs on factually dubious information were negatively correlated with subsequent levels of trust in the news media. Lower trust in the media, in turn, was related over time to higher levels of misinformation. However, we found no evidence of a reverse, parallel process where media trust shielded users against misinformation, further reinforcing trust in the news media. The lack of evidence of a downward spiral suggests that the corrosive effects of misinformation on attitudes toward the news media are less serious than originally suggested. We close with a discussion of directions for future research.

scholarly journals Elucidation of Gram-Positive Bacterial Iron(III) Reduction for Kaolinite Clay Refinement

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3084
Author(s):  
Hao Jing ◽  
Zhao Liu ◽  
Seng How Kuan ◽  
Sylvia Chieng ◽  
Chun Loong Ho
Keyword(s):  
Iron Reduction ◽  
Growth Conditions ◽  
Cellular Interaction ◽  
Kaolin Clay ◽  
Media Composition ◽  
Gram Positive ◽  
Kaolinite Clay ◽  
Gram Positive Bacteria ◽  
Rich Media ◽  
The Media

Recently, microbial-based iron reduction has been considered as a viable alternative to typical chemical-based treatments. The iron reduction is an important process in kaolin refining, where iron-bearing impurities in kaolin clay affects the whiteness, refractory properties, and its commercial value. In recent years, Gram-negative bacteria has been in the center stage of iron reduction research, whereas little is known about the potential use of Gram-positive bacteria to refine kaolin clay. In this study, we investigated the ferric reducing capabilities of five microbes by manipulating the microbial growth conditions. Out of the five, we discovered that Bacillus cereus and Staphylococcus aureus outperformed the other microbes under nitrogen-rich media. Through the biochemical changes and the microbial behavior, we mapped the hypothetical pathway leading to the iron reduction cellular properties, and found that the iron reduction properties of these Gram-positive bacteria rely heavily on the media composition. The media composition results in increased basification of the media that is a prerequisite for the cellular reduction of ferric ions. Further, these changes impact the formation of biofilm, suggesting that the cellular interaction for the iron(III)oxide reduction is not solely reliant on the formation of biofilms. This article reveals the potential development of Gram-positive microbes in facilitating the microbial-based removal of metal contaminants from clays or ores. Further studies to elucidate the corresponding pathways would be crucial for the further development of the field.

scholarly journals The Linguistic Features of Acronyms in Arabic

SAGE Open ◽  
2017 ◽  
Vol 7 (4) ◽  
pp. 215824401774671
Author(s):  
Abdel Rahman Mitib Altakhaineh
Keyword(s):  
Formation Process ◽  
Relevance Theory ◽  
Contextual Effects ◽  
Word Formation ◽  
Linguistic Features ◽  
Radio Stations ◽  
Depth Analysis ◽  
The Media ◽  
Processing Effort ◽  
Over Time

This study investigates the phonological, semantic, and pragmatic features of acronyms in Arabic. Acronyms in Arabic have appeared quite recently as a result of globalization and exposure to or contact with, mainly, English via radio stations and TV channels, which are broadcasting in English and in some countries, for example, Morocco in both English and French. Through in-depth analysis, it has been observed that acronyms in Arabic are subject to different restrictions: (a) The phonological combinations are formed on the basis of Arabic templates; hence, should be compatible with Arabic phonotactics, for example, consonant clusters should be broken up by vowels; (b) the connotation of the acronyms should not be negative; and (c) in conformity with relevance theory, when the acronyms are homophonous to existing words, the former maximize contextual effects with minimum processing effort. The fact that they appear in certain contexts also reduces the processing effort. It has also become evident that the period between the establishment of the movement or party and the first use of the acronym decreases over time, provided that the acronyms are frequently mentioned in the media. The examination of acronyms in different languages shows that acronymization is quite pervasive cross-linguistically; this may suggest that not any word-formation process can easily spread; it needs to be prevalent and potentially universal.

scholarly journals Social Representations of the Environment in Press Media

2015 ◽  
Vol 25 (61) ◽  
pp. 261-269 ◽  
Author(s):  
Gislei Mocelin Polli ◽  
Brigido Vizeu Camargo
Keyword(s):  
Paradigm Shift ◽  
Social Representations ◽  
Representational Content ◽  
Environmental Issues ◽  
Paradigm Shifts ◽  
Qualitative Survey ◽  
The Press ◽  
Global Impacts ◽  
The Media ◽  
Over Time

Environmental issues are given prominence in the media and scientific circles. From the 60’s until early 2010 there were changes in the way people related to the environment, with a paradigm shift occurring regarding the environment. This study sought to identify the representational content disseminated by the press media on the environment in different periods. A qualitative survey was therefore conducted of documents, and data were obtained through texts published in a magazine with national circulation. The data were analyzed using the ALCESTE program with a Lexicographic Analysis. It was identified that the press media reflects the paradigm shifts, and publications dating from the late 60’s are compatible with the old paradigm, evolving over time, and are now compatible with the new environmental paradigm. The results indicate that currently the environment needs care in all its aspects and lack of care creates global impacts.

Effect of postharvest dipping in insecticides on the vase life of Geraldton waxflower

1996 ◽  
Vol 36 (3) ◽  
pp. 373 ◽  
Author(s):  
KA Seaton ◽  
DC Joyce
Keyword(s):  
Wetting Agent ◽  
Vase Life ◽  
Ambient Temperatures ◽  
Application Rates ◽  
Wetting Agents ◽  
Chamelaucium Uncinatum

In postharvest dipping treatment of Geraldton waxflower (Chamelaucium uncinatum), 13 insecticides tested at recommended application rates caused no visual injury, but some reduced vase life. Flowers of cv. Purple Pride were more sensitive to insecticides than leaves. There was no loss of vase life of flowers following dipping in chlorpyrifos, dimethoate or permethrin. Following dipping in deltamethrin, carbaryl, dichlorvos, cypermethrin, endosulfan or fenvalerate there was 31-49% loss of vase life. No loss of vase life was observed for cv. Alba, after dipping in carbaryl, fenvalerate or dimethoate. Insecticide dips containing wetting agent and a fungicide (e.g. a combination of deltamenthrin, Aqua and benomyl) was a suitable dip for Geraldton waxflower. Wetting agents varied in their effect on vase life. Aqua shortened vase life less than Agral, and D-CTrate less than D-C-Tron. Stems rapidly lost weight when held out of water following dipping, and vase life was reduced when ambient temperatures were above 30�C or drying times exceeded 60 min. It was concluded that flowers should be kept cool and well hydrated following dipping treatment.

scholarly journals In vitro shoot regeneration through anther culture of Brassica spp.

1970 ◽  
Vol 35 (2) ◽  
pp. 331-341 ◽  
Author(s):  
MA Sayem ◽  
M Maniruzzaman ◽  
SS Siddique ◽  
M Al-Amin
Keyword(s):  
Plant Regeneration ◽  
Anther Culture ◽  
Shoot Regeneration ◽  
Callus Induction ◽  
Maximum Rate ◽  
Media Composition ◽  
Shoot Initiation ◽  
The Media

The experiment was conducted to investigate the performance of three different genotypes (BARI Sarisha-6, BARI Sarisha-8, and BARI Sarisha-11) in two different media viz., MS and B5 with different concentrations of phytohormone (2, 4-D) for callus induction from uninucleate stage anthers of Brassica and subsequent plant regeneration in MS media with different concentrations of phytohormone (BAP and NAA). Among the genotypes, BARI Sarisha-8 showed the best performance for all the parameters of callus induction. The performance of BARI Sarisha-6 was poor compared to others. Maximum rate of callus induction (%) was observed in MS + 0.5 mg/L 2, 4-D followed by B5 + 0.5 mg/L 2,4-D. The media combination MS + 1.0 mg/L BAP 0.3 mg/L 2,4-D showed the best performance for maintenance of calli. Significant variations were observed among the genotypes and media composition for shoot regeneration. Among the genotypes, BARI Sarisha-8 showed the best performance for shoot regeneration followed by BARJ Sarisha-l1. The genotype BARI Sarisha-8 produced higher percent of shoots/calli and required minimum days for shoot initiation. Higher percent calli without shoot were produced by the genotype BARI Sarisha-6. The media combination MS + 2.0 mg/L BAP + 0.5 mg/L NAA showed the best performance for shoot regeneration and required maximum days for shoot initiation. Keywords: Regeneration; BARI Sarisha-6; BARI Sarisha-8; BARI Sarisha-11; anther culture; phytohormone  DOI: 10.3329/bjar.v35i2.5896Bangladesh J. Agril. Res. 35(2) : 331-341, June 2010

scholarly journals Newspaper attention and policy activities in Spain

2013 ◽  
Vol 33 (1) ◽  
pp. 65-88 ◽  
Author(s):  
Laura Chaqués Bonafont ◽  
Frank R. Baumgartner
Keyword(s):  
Policy Process ◽  
Front Page ◽  
Political Leaders ◽  
Daily Newspapers ◽  
Media Attention ◽  
Comprehensive Database ◽  
Media System ◽  
The Media ◽  
Over Time

AbstractSpain's newspapers are characterised by strong partisan identities. We demonstrate that the two leading newspapers nonetheless show powerful similarities in the topics of their coverage over time. The media system is strongly related to the policy process and it shows similar levels of skew (attention focuses on just a few topics) and friction (attention lurches rapidly from topic to topic) as others have shown for policy processes more generally. Further, media attention is significantly related to parliamentary activities. Oral questions in parliament track closely with media attention over time. Our assessment is based on a comprehensive database of all front-page stories (over 95,000 stories) in El País and El Mundo, Spain's largest daily newspapers, and all 7,446 oral questions from 1996 to 2009. The paper shows that explanations of friction and skew in governmental activities should incorporate media dynamics as well. Political leaders are clearly sensitive to media salience.

scholarly journals Occurrence and epidemiological aspects of potato silver scurf in California

2004 ◽  
Vol 22 (4) ◽  
pp. 690-695 ◽  
Author(s):  
Marcos G. Cunha ◽  
David M. Rizzo
Keyword(s):  
Storage Period ◽  
Storage Conditions ◽  
Silver Scurf ◽  
Inoculum Potential ◽  
Helminthosporium Solani ◽  
Potato Tubers ◽  
Commercial Potato ◽  
Tuber Disease ◽  
Fusarium Sp ◽  
Over Time

A new potato tuber disease has been observed in the Tulelake region, California, USA, since 1995, with tuber symptoms suggestive of silver scurf disease (Helminthosporium solani). In this work we isolated, identified and demonstrated the nature of the causal agent of this potato disease in California. In addition, the distribution of H. solani in potato fields and the inoculum potential at harvest time were investigated. Disease progress and H. solani spore populations were also characterised under commercial storage conditions. The main fungal genera associated with potato tubers in storage were Helminthosporium solani, Colletotrichum sp., Fusarium sp., and Rhizoctonia sp. The results of Koch's postulates indicated that H. solani is responsible for the outbreak of silver scurf in the Tulelake region. In a disease survey in three commercial potato fields naturally infested, H. solani infections occurred in all fields. However, the extension of the infections differed significantly between the fields. During potato storage, silver scurf usually increased over time. The percentage of the tuber surface covered by silver scurf varied from 3.5% up to 35.5% during the storage period. The number of H. solani lesions per tuber also progressively increased from 6% up to 35%, six months after storage. H. solani spore populations also increased over time in all studied potato stores; nevertheless, they followed no consistent pattern, exhibiting multiple and variable peaks of increase and reduction during the period of storage.

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