Laila Shahnaz’s scientific contributions

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Publications (3)


Comparison of Extraction Assays and Quantification of Protein from Ulva anandii (Cholorophycota)
  • Article

March 2024

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5 Reads

Journal of Sustainable Environmental

Laila Shahnaz

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Hafsah Anwar

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Amarah Baloch

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Amir Haider

Seaweeds contain many macronutrients including protein, therefore they can be utilized to fulfil the protein requirements of human beings. This research focused on extracting total protein in green seaweed Ulva anandii (Amjad et Shameel 1993), from the crude extracts, by using the trichloroacetic acid (TCA) and acetone precipitation methods, and the estimation of crude extract (water-soluble proteins), and those obtained from the two above-mentioned methods. The results indicate that the water-soluble proteins had the highest quantity (949.75µg/mL) followed by the TCA precipitation method (831µg/mL), while the acetone precipitation method had the least concentration of total protein (100 µg/mL). The study concludes that treatment with organic solvents lowers the quantity of protein extracted from U. anandii.


Fourier transform infrared (FT-IR) spectroscopic investigations of four agarophytes from northern Arabian sea

December 2019

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18 Reads

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8 Citations

Bangladesh Journal of Botany

The fresh specimens of Champia compressa Harvey, Gelidium usmanghanii Afaq-Husain and M. Shameel, Gracilaria foliifera (Forsskål) Børgesen and Hypnea musciformis (Wulfen) J. V. Lamouroux, were collected from the coastal areas of Karachi (Pakistan) and their yield of agar was observed. With preextraction technique the percentage of algal yield was found to range from 13 to 28%. High quality gel strength was determined by modulus of elasticity i.e. (550 – 612g/cm2) and 1090 kPa and extraction time was 2 hrs. The structure of agar and agar contents were investigated by FT-IR spectroscopy for the first time from Pakistan. The results revealed some interesting characters (non sulphated β-D galacto pyranose residues, 3,6 anhydro galactose vibration), which were not reported earlier.


The physiochemical properties of soil used in the pot experiment.
BIOREMEDIATION POTENTIAL OF SOME LOCAL GRASSES OF KARACHI CITY
  • Article
  • Full-text available

January 2019

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391 Reads

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4 Citations

Hina Shehnaz

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Sidra Naz

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Laila Shahnaz

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[...]

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The study was conducted to explore bioremediation potential of four commonly growing grass species e.g. Khabal (Cynodon dactylon) (Linnaeus) Persoon, Vetiver (Vetiveria zizanioides) (Linnaeus) Nash, Elephant (Pennisetum purpureum) Schumach. and jungle rice (Echinochloa colona) (Linnaeus) Link, common inhabitants of industrial disposal point, Sharafi Goth, Karachi, Pakistan. The highest fresh and dry weight recorded in Elephant grass (Pennisetum purpureum) i.e. 360g and 257g respectively. While the maximum shoot (147 cm) and root lengths (249 & 217 cm) were also revealed by the same species. The highest value of Lead (0.8 mg/kg) was observed in Vetiver (Vetiveria zizanioides), while Elephant (Pennisetum purpureum) showed the maximum bioaccumulation of Zinc (2.41 mg/kg) was observed in contaminated soil. However, high uptake level of Copper (2.44 mg/kg) and Cadmium (0.31 mg/kg) was observed from the mixed soil of Khabal (Cynodon dactylon). Whereas, Jungle rice (Echinochloa colona) exhibited remarkably low remediation capability.

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Citations (2)


... Table 1 summarizes the wavenumbers associated with the vibrational modes in the unmodified agar and modified agar (AG-1M), corroborating previous works. [20][21][22] The main bands are observed in the region between 800 and 1300 cm À 1 . The bands at 882 and 890 cm-1 are attributed to CÀ H bending at the anomeric carbon in β galactopyranosyl residues. ...

Reference:

Gel Biopolymer Electrolytes Based on Saline Water and Seaweed to Support the Large‐Scale Production of Sustainable Supercapacitors
Fourier transform infrared (FT-IR) spectroscopic investigations of four agarophytes from northern Arabian sea
  • Citing Article
  • December 2019

Bangladesh Journal of Botany

... They observed a lower value for Cu (144.7 mg/kg) and a higher Mn (2508 mg/kg) concentration in polluted soil. Shehnaz et al. [36] studied the bioremediation potential of selected local grasses and soil in Karachi city. They found different results for Cu (6.7 mg/kg), phosphorus (80.7 mg/kg), and potassium (806.7 mg/kg) in the target soil, while the percentage of saturation (28.3%) and TOM (0.3%) were much similar to the present results. ...

BIOREMEDIATION POTENTIAL OF SOME LOCAL GRASSES OF KARACHI CITY