scholarly journals Cassava starch-graft-poly(acrylonitrile)-coated urea fertilizer with sustained release and water retention properties

2018 ◽  
Vol 37 (7) ◽  
pp. 2687-2694 ◽  
Author(s):  
Alummoottil N. Jyothi ◽  
Swetha S. Pillai ◽  
Mancharyamkunnath Aravind ◽  
Salma A. Salim ◽  
Susan John Kuzhivilayil
Keyword(s):  
Sustained Release ◽  
Water Retention ◽  
Cassava Starch ◽  
Urea Fertilizer ◽  
Coated Urea ◽  
Water Retention Properties ◽  
Poly Acrylonitrile

Synthesis and Water Retention Properties of Poly(Acrylamide)-g-Kenaf Fiber Hydrogel

2015 ◽  
Vol 1119 ◽  
pp. 310-313
Author(s):  
Ila Najaa Ali Badaruddin ◽  
Shahrir Hashim
Keyword(s):  
Water Retention ◽  
Ammonium Persulfate ◽  
Solution Polymerization ◽  
Agricultural Field ◽  
Kenaf Fiber ◽  
Superabsorbent Hydrogel ◽  
Liquid Fertilizer ◽  
Urea Fertilizer ◽  
Water Retention Properties ◽  
Poly Acrylamide

The purpose of this research was to study water retention properties of superabsorbent hydrogel based on poly (acrylamide)/biofiller hydrogel and urea liquid fertilizer, by solution polymerization. Kenaf fiber (KF) was used as biofiller and the preparation of the poly (acrylamide)-grafted-kenaf fiber (PAAm-g-KF) hydrogel was carried out by polymerizing the monomer. Urea fertilizer was employed as polymerization media. N,N’-methylene bisacrylamide (MBA) was used as a crosslinker and ammonium persulfate (APS) as an initiator. Water retention of the hydrogel was studies in soil with three different samples (Controlled, PAAm Hydrogel, PAAm-g-KF). The PAAm-g-KF was also applied to agricultural field. The results show that PAAm-g-KF greatly improved water retention in the soil and agricultural field.

scholarly journals Carboxylated nanocellulose superabsorbent: Biodegradation and soil water retention properties

2021 ◽  
pp. 51495
Author(s):  
Ruth M. Barajas‐Ledesma ◽  
Vanessa N. L. Wong ◽  
Karen Little ◽  
Antonio F. Patti ◽  
Gil Garnier
Keyword(s):  
Soil Water ◽  
Water Retention ◽  
Soil Water Retention ◽  
Water Retention Properties

scholarly journals Applications of Hyaluronic Acid in Ophthalmology and Contact Lenses

Molecules ◽  
2021 ◽  
Vol 26 (9) ◽  
pp. 2485
Author(s):  
Wan-Hsin Chang ◽  
Pei-Yi Liu ◽  
Min-Hsuan Lin ◽  
Chien-Ju Lu ◽  
Hsuan-Yi Chou ◽  
...  
Keyword(s):  
Hyaluronic Acid ◽  
Dry Eye ◽  
Water Retention ◽  
Contact Lenses ◽  
Anterior Segment ◽  
Vitreous Body ◽  
Material Surface ◽  
Connective Tissues ◽  
Water Retention Properties ◽  
Bull's Eye

Hyaluronic acid (HA) is a glycosaminoglycan that was first isolated and identified from the vitreous body of a bull’s eye. HA is ubiquitous in the soft connective tissues of animals and therefore has high tissue compatibility for use in medication. Because of HA’s biological safety and water retention properties, it has many ophthalmology-related applications, such as in intravitreal injection, dry eye treatment, and contact lenses. Due to its broad range of applications, the identification and quantification of HA is a critical topic. This review article discusses current methods for analyzing HA. Contact lenses have become a widely used medical device, with HA commonly used as an additive to their production material, surface coating, and multipurpose solution. HA molecules on contact lenses retain moisture and increase the wearer’s comfort. HA absorbed by contact lenses can also gradually release to the anterior segment of the eyes to treat dry eye. This review discusses applications of HA in ophthalmology.

Soil wetting-drying and water-retention properties in a mine-soil treated with composted and thermally-dried sludges

2011 ◽  
Vol 62 (5) ◽  
pp. 696-708 ◽  
Author(s):  
G. Ojeda ◽  
S. Mattana ◽  
M. Bonmatí ◽  
S. K. Woche ◽  
J. Bachmann
Keyword(s):  
Water Retention ◽  
Mine Soil ◽  
Soil Wetting ◽  
Water Retention Properties

scholarly journals Kinetika Slow Release Pupuk Urea Berlapis Chitosan Termodifikasi

2017 ◽  
Vol 1 (2) ◽  
Author(s):  
YC Danarto ◽  
Anggita Nugrahey ◽  
Sela Murni Noviani
Keyword(s):  
Water Retention ◽  
Slow Release ◽  
Zero Order ◽  
Release Profile ◽  
Nitrogen Release ◽  
Diffusion Kinetic ◽  
Urea Fertilizer ◽  
First Order ◽  
Modified Chitosan ◽  
Urea Content

<p>During this time, the use of urea is not efficient, because about 40-70% of nitrogen in the fertilizer is not absorbed by plants. In order to increase the effectivity of nitrogen release in urea fertilizer, it needs to be coated with modified chitosan as slow releasing agent to form a hydrogel material by forming a cross linking with glutaraldehyde cross-linker.The aims of this research is to study the mechanism and the appropriate kinetic model of nitrogen release in slow releasing fertilizer of modified chitosan. This research was conducted by analyzing the ability of bio-hydrogel by calculating the percentage of swelling ratio and water retention of hydrogel and the nitrogen release in slow releasing fertilizer both in the soil and water. The experiments were conducted by varying the amount of urea used which  30 gram, 40 gram, 50 gram, 60 gram and 70 gram of urea fertilizer. The The release profile is then plotted on several models of diffusion kinetic such as zero order, first order, higuchi and korsmeyer peppas. The appropriate model of diffusion kinetic is chosen by the largest correction factor (R2).The results showed that nitrogen release of the slow releasing fertilizer in the soil with 50% urea content  and  the  water  followed  korsmeyer  peppas  model  with  fickian  mechanism. Nitrogen release in the soil with urea content of 30%, 40%, 60%, and 70% followed the korsmeyer peppas model with nonfickian mechanism.</p>

scholarly journals The water retention properties of biochar derived from broiler poultry litter as applied to the Botswana soil

2020 ◽  
Vol 1 (1) ◽  
pp. 66-72 ◽  
Author(s):  
Thapelo Shomana ◽  
Daniel Botha ◽  
Paul Şerban Agachi
Keyword(s):  
Water Loss ◽  
Water Retention ◽  
Arable Land ◽  
Poultry Litter ◽  
Field Capacity ◽  
Exchange Capacity ◽  
Convincing Evidence ◽  
Similar Response ◽  
Zero Hunger ◽  
Water Retention Properties

Crop farming in Botswana is very modest and of high risk compared to its neighboring countries because of significant dependency on reduced and unreliable rainfall and as a result of soils with poor water holding capacity and low cation exchange capacity. For this reason, only about two thirds of the available arable land are planted and of the planted land only about half is harvested, which translates into only one third of productive arable land. This study examines how addition of poultry litter (PL) biochar affects water retention properties of Botswana’s sandy soils. While many variables should be studied to fully comprehend this aspect, this paper exploits in detail, effects of biochar addition in reducing rate of water loss by evaporation. This work provides convincing evidence that addition of PL-derived biochar (as little as 10%) can significantly reduce water loss by evaporation, thus increasing water soil retention. It is demonstrated that water retention properties increase with increasing rate of biochar application. Two types PL-derived biochar were studied: (i) one with sunflower husks bedding and another (ii) with woodchips bedding. Though both biochars showed similar response to the test, the biochar with sunflower husks was slightly superior. Biochar also indicated significant hygroscopicity, when dried and left exposed to the atmosphere, as moisture content increased with increasing humidity. Based on initial indicators, further study should be done at laboratory and field scale to determine optimum conditions of biochar application in the quest to improve food security for Botswana, as well as improve employment and environmental goals of the country. A comprehensive further study should critically examine Field Capacity, Permanent Wilting Point, and Plant Available Water. As an ultimate goal, enhancing soil moisture retention properties of Botswana’s sandy soil enables to increase success rate in the traditional farming sector and, consequently, offers potential to accomplish “No Poverty” and “Zero Hunger” sustainable development goals.

Changes in water retention properties due to the application of sugar foam in red soils

2011 ◽  
Vol 98 (12) ◽  
pp. 1834-1839 ◽  
Author(s):  
C. Pérez-de-los-Reyes ◽  
J.A. Amorós Ortíz-Villajos ◽  
F.J. García Navarro ◽  
S. Bravo Martín-Consuegra ◽  
C. Sánchez Jiménez ◽  
...  
Keyword(s):  
Water Retention ◽  
Red Soils ◽  
Water Retention Properties
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