Environmental Chemistry

Manahan, Stanley E.

doi:10.1201/9781315160474

Cited by 101 publications

(59 citation statements)

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“…The texture as well as physicochemical properties of soils affect its heavy metal contents and control directly or indirectly the nature of reactions that occur on the surfaces of their constituting particles (Manahan 1994;He et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Soil characterization and heavy metal pollution assessment in Orabi farms, El Obour, Egypt

et al. 2019

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Background: Soil pollution negatively impacts on food safety and human health. The main aim of this work is to determine the As, Cd, Cr, Cu, and Pb concentrations in Orabi farms, El Obour city, Egypt. The contamination of soil with these metals was assessed by contamination factors (CF), degree of contamination (DC), pollution load index (PLI), ecological risk factor (Er), potential ecological risk index (PRI), and index of geoaccumulation (I geo ). Eleven soil samples were collected from Orabi farms and analyzed for physicochemical characteristics. Results:The results indicate that Orabi soils are considered alkaline (pH = 8.11), weakly calcareous (CaCO 3 = 3.6%), sandy (sand = 90.23%) soils, and non-saline to slightly saline (EC = 4840.68 μS/cm) in nature. In addition, it contains negligible organic matter percent (OM = 3.15%) and so it is classified as mineral soil. The average concentrations of As, Cd, Cr, Cu, and Pb were 147. 46, 2.31, 44.50, 4.10, and 13.01 mg/kg, respectively. Conclusion: The calculated I geo , CF, and Er recorded that investigated soil samples are uncontaminated with Cr, Cu, and Pb, considerably contaminated with Cd, and highly contaminated with As. The calculated integrated pollution indices PRI, PLI, and DC showed that soil samples were contaminated with the studied heavy metals. The high CF values of As and Cd are the main contributor to soil high contamination. The application of fertilizers and other agricultural practice in the study area must be paid attention.

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Section: Introductionmentioning

confidence: 99%

Soil characterization and heavy metal pollution assessment in Orabi farms, El Obour, Egypt

et al. 2019

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“…Figure 9 shows the measured concentration of NO in NO-OFP-MB (9:1 and 1:1 v/v) per ml of solution. Water saturated with a combination of NO and OFP either at 1:1 or 9:1 v/v mixture ratio contains 0.96 or 1.72 mM NO at room temperature (Manahan, 2017). The NO dose of NO-OFP-MB 1:1 and 9:1 v/v was 3.1 and 2.8-fold higher than that of water saturated with an equivalent NO and OFP mixture ratio.…”

Section: Resultsmentioning

confidence: 93%

Bactericidal Activity of Lipid-Shelled Nitric Oxide-Loaded Microbubbles

Lafond¹,

Shekhar²,

Panmanee³

et al. 2020

Front. Pharmacol.

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The global pandemic of antibiotic resistance is an ever-burgeoning public health challenge, motivating the development of adjunct bactericidal therapies. Nitric oxide (NO) is a potent bioactive gas that induces a variety of therapeutic effects, including bactericidal and biofilm dispersion properties. The short half-life, high reactivity, and rapid diffusivity of NO make therapeutic delivery challenging. The goal of this work was to characterize NO-loaded microbubbles (MB) stabilized with a lipid shell and to assess the feasibility of antibacterial therapy in vitro. MB were loaded with either NO alone (NO-MB) or with NO and octafluoropropane (NO-OFP-MB) (9:1 v/v and 1:1 v/v). The size distribution and acoustic attenuation coefficient of NO-MB and NO-OFP-MB were measured. Ultrasound-triggered release of the encapsulated gas payload was demonstrated with 3-MHz pulsed Doppler ultrasound. An amperometric microelectrode sensor was used to measure NO concentration released from the MB and compared to an NO-OFP-saturated solution. The effect of NO delivery on the viability of planktonic (free living) Staphylococcus aureus (SA) USA 300, a methicillin-resistant strain, was evaluated in a 96 well-plate format. The co-encapsulation of NO with OFP increased the total volume and attenuation coefficient of MB. The NO-OFP-MB were destroyed with a clinical ultrasound scanner with an output of 2.48 MPa peak negative pressure (in situ MI of 1.34) but maintained their echogenicity when exposed to 0.02 MPa peak negative pressure (in situ MI of 0.01. The NO dose in NO-MB and NO-OFP-MB was more than 2-fold higher than the NO-OFPsaturated solution. Delivery of NO-OFP-MB increased bactericidal efficacy compared to the NO-OFP-saturated solution or air and OFP-loaded MB. These results suggest that encapsulation of NO with OFP in lipid-shelled MB enhances payload delivery. Furthermore, these studies demonstrate the feasibility and limitations of NO-OFP-MB for antibacterial applications.

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“…Jumlah penduduk Desa Pematang Rahim 3.577 jiwa, mata pencaharian penduduk Pematang Rahim sebagai petani, nelayan, pedagang, perbengkelan, dan PNS. Penduduk sebagai petani sebanyak (407 kepala keluarga) yang menanam berbagai jenis tanaman dengan komoditas unggulan kelapa sawit, selain itu terdapat tanaman holtikultura seperti pisang dengan jumlah pohon sebanyak 42.100 pohon dengan produksi buah pisang 1.020 kuintal [3].…”

Section: Pendahuluanunclassified

Prospek Pemanfaatan Limbah Batang Pisang Dalam Mendukung Ekonomi Kreatif Masyarakat Ramah Lingkungan

Syarifuddin

Hamzah

2019

dinamisia

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Abstract Dedication has been carried out in the Farmers Group (Canggam Craftfirra) and Karya Maju Farmers Group on Pematang Rahim Village, Mendahara Ulu District, East Tanjung Jabung Regency. Implementation of service for 8 months from May to November 2018. Objectives for empowering group members in supporting the banana cultivation program and processing banana stem waste as an environmentally friendly paper raw material. The results of dedication activities show that high public interest in utilizing the technology of processing banana stem waste as a raw material for paper to make household handicrafts (home industry) is caused so far Banana stem waste is only wasted and has not been processed into paper pulp. The use of banana stem waste has the advantage of being easily available, easy to do and the price is relatively cheap, so that its use will provide benefits for farmer groups and craftsmen. The prospect of using banana stem waste can be applied to support the creative economy. Keywords: waste banana stems, paper pulp, handicrafts

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Environmental Chemistry

Cited by 101 publications

References 0 publications

Soil characterization and heavy metal pollution assessment in Orabi farms, El Obour, Egypt

Soil characterization and heavy metal pollution assessment in Orabi farms, El Obour, Egypt

Bactericidal Activity of Lipid-Shelled Nitric Oxide-Loaded Microbubbles

Prospek Pemanfaatan Limbah Batang Pisang Dalam Mendukung Ekonomi Kreatif Masyarakat Ramah Lingkungan

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