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Fulltext Effects of formulation on flowability of selected herbal powders using compendial methods and powder flow analyser

Etti, C. J., Yusof, Y.A., Chin, N. L., Mohd Tahir, S.

International Food Research Journal, 2016;23(101):225-230.
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This study was aimed at investigating the effects of formulation on flowability of selected
herbal powders which include Labisia pumila, Ortosiphon stamineus, Eurycoma longifolia
and Andrographis paniculata using compendial methods and a recently available powder
flow analyser. The material properties such as moisture content, particles sizes, tap and bulk
densities of the pure herbal powders and the formulated powders were measured to determine
Carr index and Hausner ratio which were indices of the compendial methods. Cohesion
index and caking strength were used as basis of flowability indicator using the powder flow
analyser. The flowability of the herbal powders were improved when they were formulated into
beverages mix by mixing each herbal powders with other ingredients like sugar and nondairy
creamer before analyzed using both the compendial methods and powder flow analyser. Both
methods of flowability measurements adopted in this work complemented each other in the
understanding and characterization of powder flowability.
Tableting Properties and Compression Models of Labisia pumila Tablets

Etti CJ, Yusof YA, Chin NL, Mohd Tahir S

J Diet Suppl, 2017 Mar 04;14(2):132-145.
PMID: 27487244

The tableting properties of Labisia pumila herbal powder, which is well known for its therapeutic benefits was investigated. The herbal powder was compressed into tablets using a stainless steel cylindrical uniaxial die of 13-mm- diameter with compaction pressures ranging from 7 to 25 MPa. Two feed weights, 0.5 and 1.0 g were used to form tablets. Some empirical models were used to describe the compressibility behavior of Labisia pumila tablets. The strength and density of tablets increased with increase in compaction pressure and resulted in reduction in porosity of the tablets. Smaller feeds, higher forces and increase in compaction pressure, contributed to more coherent tablets. These findings can be used to enhance the approach and understanding of tableting properties of Labisia pumila herbal powder tablets.
Assessing the mechanism of energy efficiency and energy poverty alleviation based on environmental regulation policy measures

Wu B, Liu S, Wang J, Tahir S, Patwary AK

Environ Sci Pollut Res Int, 2021 Aug;28(30):40858-40870.
PMID: 33772472 DOI: 10.1007/s11356-021-13605-2

This work aims to assess multidimensional energy poverty and energy efficiency for environmental policy measures using data envelopment analysis (DEA), a DEA-Like mathematical composite indicator applied on a dataset based on multiple sets of variables from South Asian economies. The multidimensional energy poverty index (MEPI) is computed to analyze the combining effects and energy poverty in these countries. Simultaneously, South Asia's metropolitan areas' population rose by 130 million between 2001 and 2011 and is projected to expand by approximately 250 million by 2030. The findings reveal that endogenous increasing population shocks account for about 72% of energy use. In contrast, the long-term effects of remittance revenue, economic growth, and urbanization on energy use are approximately 20%, 8.25%, and 0.03%, respectively. This work advocates more coordinated and innovative policies to eliminate energy poverty. It can act as a base for policymakers and government officials to make efficient policies and enforce them properly in the regional power sector. Policies should be designed around a smarter use of biomass for cooking, alternate sources for domestic energy production, increased programs for biomass-based cookstoves, and periodic regional-level energy database development.
Fulltext The frequency of pulmonary hypertension in newborn with intrauterine growth restriction

Abbas G, Shah S, Hanif M, Shah A, Rehman AU, Tahir S, et al.

Sci Rep, 2020 05 15;10(1):8064.
PMID: 32415157 DOI: 10.1038/s41598-020-65065-2

Intrauterine growth restriction (IUGR) is a clinical definition applied to neonates born with clinical features of malnutrition and in-utero growth retardation irrespective of their birth weight percentile. This study was aimed to determine the frequency of pulmonary hypertension (PH) in neonates with IUGR. In this descriptive cross-sectional study, we followed 96 neonates with IUGR (≤28 days) and 38 neonates without IUGR born in the department of the neonatal intensive care unit children hospital complex Multan, Pakistan. We analyzed certain factors such as gender, gestational age (GA) (weeks), birth weight (BW in kg), weight percentile (WP) for GA, meconium aspiration syndrome (MAS), birth asphyxia (BA) and respiratory distress syndrome (RDS) for pulmonary hypertension (PH) in IUGR and non-IUGR group. GA was measured by the Ballard scoring system. Echocardiography was performed for all patients by the pediatric cardiologist to measure pulmonary arterial (PA) pressure using Bernoulli's equation. Out of total 96 IUGR neonates, 33.3% (n = 32) suffered from PH, of which 65.3% (n = 18) were male and 43.7% (n = 14) were female. The percentages of IUGR neonates with BA, MAS and RDS were 34.4%, 18.8% and 22.9% respectively. The data were analyzed using the SPSS-16 software to test the statistical significance of the results. A p-value less than 0.05 was considered significant. When the chi-square test was applied, it depicted that MAS was significantly associated with PH in IUGR neonates (p = 0.0001) compared to non-IUGR neonates. Our findings suggested an increased chance of PH in IUGR neonates and MAS may be a strong factor.
First-principle investigations of structural, electronic, thermal, and mechanical properties of AlP1-xBix alloys

Oumelaz F, Nemiri O, Boumaza A, Meradji H, Ghemid S, Khenata R, et al.

J Mol Model, 2023 Mar 31;29(4):124.
PMID: 37000284 DOI: 10.1007/s00894-023-05497-5

CONTEXT: In this work, a comprehensive study concerning the physical properties of ternary alloys system (AlP1-xBix) at different concentrations is presented. The obtained results from our first-principle calculations are compared with previously reported studies in the literature and discussed in detail. Our computed results are found in a nice agreement where available with earlier reported results. Electronic band structures at the above-mentioned concentrations are also determined. Likewise, the impact of the varying temperature and pressure on Debye temperature, heat capacity, and entropy is analyzed as well. Furthermore, elastic constants and related elastic moduli results are also computed. Our results show that alloys are stable and found to be in brittle nature. This is the first quantitative study related to ternary alloys (AlP1-xBix) at mentioned concentrations. We soon expect the experimental confirmation of our predictions.
METHOD: The calculations are performed, at concentrations x=0.0, 0.25, 0.5, 0.75, and 1.0 by using the "full potential (FP) linearized (L) augmented plane wave plus local orbital (APW+lo) method framed within density functional theory (DFT)" as recognized in the "WIEN2k computational code". The "quasi-harmonic Debye model" approach is employed to determine the thermal properties of the title alloys.
Effect of Surface Functional Groups on the Electronic Behavior and Optical Spectra of Mn2N Based MXenes

Ul Haq B, Kim SH, Rasool Chaudhry A, AlFaify S, Butt FK, Tahir SA, et al.

Chemphyschem, 2024 Jun 17;25(12):e202300605.
PMID: 38517984 DOI: 10.1002/cphc.202300605

The extensive applications of MXenes, a novel type of layered materials known for their favorable characteristics, have sparked significant interest. This research focuses on investigating the influence of surface functionalization on the behavior of Mn2NTx (Tx=O2, F2) MXenes monolayers using the "Density functional theory (DFT) based full-potential linearized augmented-plane-wave (FP-LAPW)" method. We elucidate the differences in the physical properties of Mn2NTx through the influence of F and O surface functional groups. We found that O-termination results in half-metallic behavior, whereas the F-termination evolves metallic characteristics within these MXene systems. Similarly, surface termination has effectively influenced their optical absorption efficiency. For instance, Mn2NO2 and Mn2NF2 effectively absorb UV light ~50.15×104 cm-1 and 37.71×104 cm-1, respectively. Additionally, they demonstrated prominent refraction and reflection characteristics, which are comprehensively discussed in the present work. Our predictions offer valuable perspectives into the optical and electronic characteristics of Mn2NTx-based MXenes, presenting the promising potential for implementing them in diverse optoelectronic devices.