Preparation and Properties of Urea Slow-Release Fertilizer Hydrogel by Sodium Alginate-Gelatin Biopolymer

2021 ◽  
Vol 889 ◽  
pp. 98-103
Author(s):  
Wilawan Hnoosong ◽  
Pornpairin Rungcharoenthong ◽  
Suntree Sangjan
Keyword(s):  
Nitrogen Fertilizer ◽  
Slow Release ◽  
Release Kinetics ◽  
Release Kinetic ◽  
Order Kinetic ◽  
High Solubility ◽  
Kinetic Rate ◽  
Kinetic Rates ◽  
Slow Release Fertilizers ◽  
The Way

Urea is high solubility nitrogen fertilizer. There is major nitrogen pollution in ecosystem. Slow-release nitrogen fertilizer the way to decrease nitrogen form agriculture. Slow-release nitrogen fertilizer the way to decrease nitrogen in agriculture. Slow-release formulations of nitrogen fertilizer were developed based on alginate-gelatin by using calcium chloride as the cross-linker in the egg-box model as hydrogels. Water-retaining ratio, loading behavior, and the release kinetics were examined. The release kinetic rates were investigated by Zero-order kinetic, First-order kinetic, Higuchi, Korsmeyer-Peppas, Weibull, and Hixson-Crowell models. The results showed that the S1G0.5 sample (alginate 1 g and gelatin 0.5 g) was the optimum condition for application as urea slow-release fertilizers because it was a minimal release kinetic rate for 12 hrs. These results indicate that the alginate-gelatin hydrogel can be a slow-release nutrient to plant an environmentally friendly fertilizer.

scholarly journals Effect of slow release fertilizers on container-grown woody plants

2008 ◽  
Vol 34 (No. 1) ◽  
pp. 35-41 ◽  
Author(s):  
F. Šrámek ◽  
M. Dubský
Keyword(s):  
Nitrogen Fertilizer ◽  
Woody Plants ◽  
Slow Release ◽  
First Year ◽  
Nutrient Source ◽  
Thuja Occidentalis ◽  
Slow Release Fertilizers ◽  
Second Year ◽  
Soluble Fertilizer ◽  
Pyracantha Coccinea

Slow-Release Fertilizers (SRF) Silvamix Forte and Silvagen were tested in two-year experiments with container-grown woody plants (<i>Pyracantha coccinea</i>, <i>Thuja occidentalis</i>). Several fertilizing systems were compared: preplant application of SRF into substrate as the sole nutrient source for a two-year period, preplant application of SRF and soluble fertilizer (PG Mix), and preplant application of SRF and soluble fertilizer together with additional fertilizing by solution of nitrogen fertilizer during both growing periods. A system with controlled-release fertilizer (CRF) Osmocote 5&minus;6 was chosen as a control variant; it was incorporated into substrate before planting in the first year and top-dressed in the second year. CRF Plantacote 6M (mixed into substrate before planting and top-dressed in the second year) and Osmocote 16&minus;18 applied only before planting were tested, too. The experiments showed that SRF Silvamix Forte and Silvagen give results comparable with CFR provided that they were incorporated together with soluble ferti-lizer dose and plants were fertilized by solution of nitrogen fertilizer during both growing periods.

Slow-release nitrogen fertilizer in carrot production on Prince Edward Island

2012 ◽  
Vol 92 (6) ◽  
pp. 1223-1228 ◽  
Author(s):  
K. R. Sanderson ◽  
S. A. E. Fillmore
Keyword(s):  
Nitrogen Fertilizer ◽  
Prince Edward Island ◽  
Assessment Tool ◽  
Slow Release ◽  
Urea Formaldehyde ◽  
Marketable Yield ◽  
Slow Release Fertilizer ◽  
Industry Standard ◽  
Slow Release Fertilizers ◽  
The Impact

Sanderson, K. R. and Fillmore, S. A. E. 2012. Slow-release nitrogen fertilizer in carrot production on Prince Edward Island. Can. J. Plant Sci. 92: 1223–1228. The impact of nitrogen management using slow-release fertilizers has not been examined for carrot (Daucus carota L.) production in Atlantic Canada. To assess the effects of such products, we evaluated five slow-release fertilizers over a 3-yr period. Treatments consisted of sulphur coated urea (SCU) (42–0–0), isobutylidene diurea (IBDU) (31–0–0), Nutralene® (methylene urea) (40–0–0), Sirflor® (urea formaldehyde) (38–0–0), UFLEXX™ (urea, dicyandiamide, N-(n-butyl) thiophosphoric triamide) (46–0–0) compared with industry standard (ammonium nitrate) (34–0–0). All slow-release fertilizer treatments supplied N at 50 kg N ha–1 pre-plant. Slow-release fertilizer treatments were compared with the industry standard of 50 kg N ha−1 pre-plant plus 50 kg N ha–1 as a top dress. UFLEXX™ increased biological and marketable yield by 7.5 and 18.7%, respectively, compared with the industry standard. Sirflor® produced the lowest yield. GreenSeeker® NDVI reading and LECO N were correlated at the mid-season sample. GreenSeeker® technology has potential as an in-field crop health assessment tool, however, further research is required to develop GreenSeeker® algorithms appropriate for carrot production in Prince Edward Island.

Exploring siRNA Umpired Nanogels: A Tale of Barrier Combating Carrier

2020 ◽  
Vol 26 (27) ◽  
pp. 3234-3250
Author(s):  
Sushil K. Kashaw ◽  
Prashant Sahu ◽  
Vaibhav Rajoriya ◽  
Pradeep Jana ◽  
Varsha Kashaw ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Biomedical Engineering ◽  
Viral Infections ◽  
Slow Release ◽  
Molecular Level ◽  
Release Kinetics ◽  
Biologically Active ◽  
Release Process ◽  
Rapid Release ◽  
Wide Range

Potential short interfering RNAs (siRNA) modulating gene expression have emerged as a novel therapeutic arsenal against a wide range of maladies and disorders containing cancer, viral infections, bacterial ailments and metabolic snags at the molecular level. Nanogel, in the current medicinal era, displayed a comprehensive range of significant drug delivery prospects. Biodegradation, swelling and de-swelling tendency, pHsensitive drug release and thermo-sensitivity are some of the renowned associated benefits of nanogel drug delivery system. Global researches have also showed that nanogel system significantly targets and delivers the biomolecules including DNAs, siRNA, protein, peptides and other biologically active molecules. Biomolecules delivery via nanogel system explored a wide range of pharmaceutical, biomedical engineering and agro-medicinal application. The siRNAs and DNAs delivery plays a vivacious role by addressing the hitches allied with chronic and contemporary therapeutic like generic possession and low constancy. They also incite release kinetics approach from slow-release while mingling to rapid release at the targets will be beneficial as interference RNAs delivery carriers. Therefore, in this research, we focused on the latest improvements in the delivery of siRNA loaded nanogels by enhancing the absorption, stability, sensitivity and combating the hindrances in cellular trafficking and release process.

Design and Synthesis of a Novel Gabapentin-Phosphotidylcholine Conjugate for Targeting to Phospholipase A2 Enzyme through Nanostructured Lipid Carrier

2020 ◽  
Vol 16 ◽  
Author(s):  
Anjali P.B ◽  
Jawahar N. ◽  
Jubie S. ◽  
Neetu Yadav ◽  
Selvaraj A. ◽  
...  
Keyword(s):  
Drug Release ◽  
Phospholipase A2 ◽  
Release Kinetics ◽  
Entrapment Efficiency ◽  
Structural Analog ◽  
Fickian Diffusion ◽  
Release Kinetic ◽  
Nanostructured Lipid Carrier ◽  
Discovery Studio

Background: : Epilepsy is a genuine neurological turmoil that effects around 50 million individuals around the world. Practically 30% of epileptic patients experience the ill effects of pharmaco-obstruction, which is related with social seclusion, subordinate conduct, low marriage rates, joblessness, mental issues and diminished personal satisfaction. At present accessible antiepileptic drugs have a restricted viability, and their negative properties limit their utilization and cause challenges in patient administration. Gabapentin 1-(aminomethyl)cyclohexane acetic acid, Gbp , (trade name Neurontin), a structural analog of γ-aminobutyric acid (GABA), BCS class 3 drug with having permeability issues. Objective: This work was an attempt to formulate and characterize a new approach to treat epilepsy by targeting to Phospholipase A2 Enzyme through Nanostructured Lipid Carrier. Methods: Docking studied carried out using Accelrys Discovery studio 4.1 Client and gabapentin and phosphotidylcholine were conjugated through chemical conjugation. Nanostructured lipid carrier (NLC) was prepared using hot homogenization technique. Results: The libdock score of Gabapentin- Phosphotidylcholine conjugate (192.535) were found to be more than Gabapentin (77.1084) and Phosphotidylcholine (150.212). For the optimized formulation the particle size (50.08), zeta potential (-1.48), PDI (0.472) and entrapment efficiency (77.8) was observed. The NLC was studies for in-vitro drug release studies and release kinetics. Finally found that the drug release from the NLC followed Higuchi release kinetic and the mode of drug release from the NLC was found to be Non- Fickian diffusion. Conclusion: The formulated Nanostructured lipid carrier of Gabapentin-Phosphotidylcholine conjugate may be able to use to prevent seizure.

scholarly journals Mechanochemical Preparation of Slow Release Fertilizer Based on Glauconite–Urea Complexes

Minerals ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 507 ◽  
Author(s):  
Maxim Rudmin ◽  
Elshan Abdullayev ◽  
Alexey Ruban ◽  
Ales Buyakov ◽  
Bulat Soktoev
Keyword(s):  
Milling Time ◽  
Slow Release ◽  
Mechanochemical Activation ◽  
Structural Characteristics ◽  
Fluorescence Analysis ◽  
Planetary Mill ◽  
X Ray Diffraction ◽  
Mechanochemical Method ◽  
X Ray ◽  
Slow Release Fertilizers

We investigated the mechanochemical synthesis of complex slow release fertilizers (SRF) derived from glauconite. We studied the effectiveness of the mechanical intercalation of urea into glauconite using planetary and ring mills. The potassium-nitric complex SRFs were synthesized via a mechanochemical method mixing glauconite with urea in a 3:1 ratio. The obtained composites were analyzed using X-ray diffraction analysis, scanning electron microscopy, X-ray fluorescence analysis, and infrared spectroscopy. The results show that as duration of mechanochemical activation increases, the mineralogical, chemical, and structural characteristics of composites change. Essential modifications associated with a decrease in absorbed urea and the formation of microcrystallites were observed when the planetary milling time increased from 5 to 10 min and the ring milling from 15 to 30 min. Complete intercalation of urea into glauconite was achieved by 20 min grinding in a planetary mill or 60 min in a ring mill. Urea intercalation in glauconite occurs much faster when using a planetary mill compared to a ring mill.

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