Search Results

You are looking at 1 - 6 of 6 items for :

  • Biochemistry x
Clear All
Open access

Asiata Omotayo Ibrahim, Misbaudeen Abdul-Hammed, Samuel Adewale Adegboyega, Monsurat Olajide and Akeem Abefe Aliyu

. Arlington, Virginia: Association of Official Analytical Chemists. Baranska, M., Schu, W., Schulz, H., 2006, Determination of lycopene and β-carotene content in tomato fruits and related products: Comparison of FT-Raman, ATR-IR, and NIR Spectroscopy. Analytical Chemistry, 78 (24): 8456-8461 Burton-Freeman, B., Reimers, K.J., 2011, Tomato consumption and health: Emerging benefits. American Journal of Lifestyle Medicine, 5 (2): 182-191. Cohen, S., Itkin, M., Yeselson, Y., Tzuri, G., Portnoy, V., Harel-Baja, R., Lev, S., Sa’ar, U., Davidovitz-Rikanati, R

Open access

Vladimír Frišták, Wolfgang Friesl-Hanl, Martin Pipíška, Barbora Richveisová Micháleková and Gerhard Soja

Abstract

This paper evaluates the effect of simulated conditions of artificial aging on sorption capacity of two types of biochar. These were produced by slow pyrolysis from different feedstock - beech wood chips (BC A) and garden green waste residues (BC B). Cadmium served as a model for potentially toxic metals. Twenty freeze-thaw cycles were used to simulate physical aging. The determination of biochar physicochemical properties showed main changes in CEC and SA values of aged sorbents. The maximum sorption capacities of aged BC A sorbent were higher by about 26 % and aged BC B sorbent by about 20% compared to Qmax of non-aged biochar. Qmax of aged BC B peaked at 9.4 mg g-1 whereas BC A sorbed significantly less Cd. FT-IR analyses confirmed the changes in structural composition and content of functional groups on biochar surfaces. The artificial physical aging model was assessed as an efficient tool for investigation of natural weathering conditions.

Open access

Nadarajan Viju, Nagarajan Ezhilraj, Chellamnadar Vaikundavasagom Sunjaiy Shankar, Stanislaus Mary Josephine Punitha and Sathianeson Satheesh

Abstract

Bacteria associated with surfaces have been frequently cited as a potential source for the isolation of bioactive metabolites. In this study, bacteria associated with marine gastropod, Babylonia sp. were isolated and screened for antibacterial activity against biofilm-forming bacteria. The antibiofilm and antifouling effect of the selected surface- associated bacterial strains were examined under in vitro and in vivo conditions. Results showed that the extracellular polymeric substances (EPS) of the bacterial strain CML associated with gastropod species considerably reduced the adhesion of biofilm-forming bacteria on glass coupons. Besides, the antifouling coat prepared by incorporating of this EPS into polyurethane varnish prevented the settlement of biofoulers on test substratum submerged in marine waters. The functional groups present in the EPS were analyzed using FT-IR. The bacterium responsible for the production of the bioactive EPS was identified as Bacillus subtilis subsp. by 16S rRNA gene sequencing. More detailed characterization of the identified bioactive EPS could lead to the isolation of a novel natural antifouling product.

Open access

Cyril Dube, Roman Tandlich and Brendan Wilhelmi

References Abdelnaeim MY, El Sherif IY, Attia AA, Fathy NA, El-Shahat MF (2016) Impact of chemical activation on the adsorption performance of common reed towards Cu(II) and Cd(II). Int. J. Miner. Process. 157: 80-88. Ahmaruzzaman M (2010) A review on the utilization of fly ash. Prog. Energy Combust. Sci. 36: 327-363. Akyuz S, Akyuz T (2008) FT-IR and FT-Raman spectroscopic studies of adsorption of isoniazid by montmorillonite and saponite. In Vib. Spectrosc., A collection of papers presented at the 4 th International Conference on Advanced

Open access

Stefan Demcak, Magdalena Balintova, Maria Hurakova, Marina V. Frontasyeva, Inga Zinicovscaia and Nikita Yushin

of Fe (ii) and Zn (ii) using fresh eichhornia crassipes. I: Doctoral dissertation, Universiti Malaysia, Pahang. Schwanninger M, Rodrigues JC, Pereira H, Hinterstoisser B (2004) Effects of short-time vibratory ball milling on the shape of FT-IR spectra of wood and cellulose. Vib. Spectrosc. 36: 23-40. Šćiban M, Radetić B, Kevrešan Ž, Klašnja M (2007) Adsorption of heavy metals from electroplating wastewater by wood sawdust. Bioresour. Technol. 98: 402-409. Shukla A, Zhang YH, Dubey P, Margrave JL, Shukla SS (2002) The

Open access

Ottó Dóka, Andrea Brunori, Rezső Schmidt, Dane Bicanic and György Végvári

content in seed and plant of tartary buckwheat (Fagopyrum tataricum). In: Proceeding of the 9th International Symposium on Buckwheat. Prague, Czech Republic, August 18-22, 2004, 626-629. Park CH, Kim YB, Choi YS, Heo K, Kim SL, Lee KC, Chang KJ, Lee HB (2000) Rutin content in food products processed from groats, leaves and flowers of buckwheat. Fagopyrum. 17: 63-66. Rajan T, Muthukrishnana S (2013) Characterization of phenolic compounds in Pseudarthria viscida root extract by HPLC and FT-IR analysis. Asian J. Pharm. Clin. Res. 6: 274