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Effects of nano-carbon reinforcement on the swelling and shrinkage behaviour of soil

Jamal M. A. Alsharef, Mohd Raihan Taha, Ramez A. Al-Mansob, Tanveer Ahmed Khan, Mohd Raihan Taha

Sains Malaysiana, 2018;47:195-205.

In this study, the performance of two types of nanocarbons (NCs), namely carbon nanotubes (CNTs) and carbon nanofibers (CNFs), on the three-dimensional shrinkage and swelling properties of three clayey soils were investigated. The specimens of soil mixed with clay with bentonite contents of 0, 10 and 20% by weight of dry soil. NC contents of 0.05, 0.075, 0.10 and 0.20% were chosen to investigate the influence of different NC types, CNTs and CNFs. All soil specimens were compacted under maximum dry unit weight and optimum water content conditions by using standard compaction tests. The physical and mechanical characteristics of the reinforced samples were then determined. These included the desiccation cracking area, used to determine the crack intensity factor (CIF), as well as the shrinkage and swelling. The CIF for the soil specimens without NCs were higher than the soil specimens with NC additives. These results show that NCs decrease the development of desiccation cracks on the surface of compacted samples. The shrinkage and swelling tests showed that the rate of volume changing of the compacted soil specimens reduced with the increasing of NCs.
Traditional foodstuffs and household food security in a time of crisis

Muhialdin BJ, Filimonau V, Qasem JM, Algboory H

Appetite, 2021 10 01;165:105298.
PMID: 33989697 DOI: 10.1016/j.appet.2021.105298

Traditional foodstuffs play an important role in household food security. No research has, however, attempted to examine traditional foodstuffs in light of disasters and crises. Such research can provide a useful outlook on how traditional foodstuffs can aid households in a situation of disrupted food supply. This outlook becomes relevant in view of future disastrous events that can undermine household food security, especially in poor disadvantaged communities. This study examined the role of traditional foodstuffs during a major crisis. The study adopted an ethnographic perspective and the method of semi-structured household interviews to explore how traditional foodstuffs were used by communities in the city of Mosul, Iraq, under the ISIS administration and during the liberation war (2016-2017). The study showcased the critical role of traditional foodstuffs in survival of local households. It highlighted the importance of cross-generational knowledge of traditional foodstuffs in community preparedness for disasters and crises. The study proposed to integrate traditional foodstuffs into governmental strategies on household food security in Iraq, and beyond. It suggested including traditional foodstuffs in the humanitarian food supply chains in the regions prone to disasters and crises. Future research should examine the prerequisites for such inclusion, especially from the viewpoint of societal and political acceptance of traditional foodstuffs and methods of their production.
Fulltext A Comparison of the Incidence Rate for Joint Bleeding and FVIII Consumption between On-Demand versus Prophylaxis Factor VIII Replacement Therapy and the Direct Cost of Prophylaxis Treatment in Severe Haemophilia A Patients

Jamal M, Sathar J, Jamari J, Mohd Saffian S

Malays J Med Sci, 2023 Feb;30(1):129-136.
PMID: 36875203 DOI: 10.21315/mjms2023.30.1.11

BACKGROUND: Haemophilia A is a bleeding disorder caused by inadequate clotting factor VIII (FVIII). There are two main modes of treatment approach in severe haemophilia A patients either with on-demand or prophylaxis therapy with clotting factor FVIII concentrates. In this study, a comparison was made between the bleeding incidence rate of the on-demand and prophylaxis group in severe haemophilia A patients at Ampang Hospital, Malaysia.
METHODS: A retrospective study involving patients with severe haemophilia was conducted. The patient's self-reported bleeding frequency was retrieved from the patient's treatment folder from January to December 2019.
RESULTS: Fourteen patients received on-demand therapy, while the other 24 patients received prophylaxis treatment. The total number of joint bleeds in the prophylaxis group was significantly lower compared to the on-demand group (2.79 bleeds versus 21.36 bleeds [P < 0.001]). Furthermore, the total annual usage of FVIII was higher in the prophylaxis group compared to the on-demand group (1,506 IU/kg/year [± 905.98] versus 365.26 IU/kg/year [± 223.90], P = 0.001).
CONCLUSION: Prophylaxis FVIII therapy is an effective treatment in reducing the frequency of bleeding joints. However, this treatment approach is associated with high cost due to the high consumption of FVIII.
Synthesis and characterization of marine seagrass (Cymodocea serrulata) mediated titanium dioxide nanoparticles for antibacterial, antibiofilm and antioxidant properties

Narayanan M, Srinivasan S, Gnanasekaran C, Ramachandran G, Chelliah CK, Rajivgandhi G, et al.

Microb Pathog, 2024 Apr;189:106595.
PMID: 38387848 DOI: 10.1016/j.micpath.2024.106595

Cymodocea serrulata mediated titanium dioxide nanoparticles (TiO2 NPs) were successfully synthesized. The XRD pattern and FTIR spectra demonstrated the crystalline structure of TiO2 NPs and the presence of phenols, flavonoids and alkaloids in the extract. Further SEM revealed that TiO2 NPs has uniform structure and spherical in shape with their size ranged from 58 to 117 nm. Antibacterial activity of TiO2 NPs against methicillin-resistant Staphylococcus aureus (MRSA) and Vibrio cholerae (V. cholerae), provided the zone of inhibition of 33.9 ± 1.7 and 36.3 ± 1.9 mm, respectively at 100 μg/mL concentration. MIC of TiO2 NPs against MRSA and V. cholerae showed 84% and 87% inhibition at 180 μg/mL and 160 μg/mL respectively. Subsequently, the sub-MIC of V. cholerae demonstrated minimal or no impact on bacterial growth at concentration of 42.5 μg/mL concentration. In addition, TiO2 NPs exhibited their ability to inhibit the biofilm forming V. cholerae which caused distinct morphological and intercellular damages analysed using CLSM and TEM. The antioxidant properties of TiO2 NPs were demonstrated through TAA and DPPH assays and exposed its scavenging activity with IC50 value of 36.42 and 68.85 μg/mL which denotes its valuable antioxidant properties with potential health benefits. Importantly, the brine shrimp based lethality experiment yielded a low cytotoxic effect with 13% mortality at 100 μg/mL. In conclusion, the multifaceted attributes of C. serrulata mediated TiO2 NPs encompassed the antibacterial, antioxidant and anti-biofilm inhibition effects with low cytotoxicity in nature were highlighted in this study and proved the bioderived TiO2 NPs could be used as a promising agent for biomedical applications.
Fulltext Changes in infants faecal characteristics and microbiota by inulin supplementation

K W Yap W, Mohamed S, Husni Jamal M, Diederick M, A Manap Y

J Clin Biochem Nutr, 2008 Nov;43(3):159-66.
PMID: 19015750 DOI: 10.3164/jcbn.2008055

The effects of inulin on the microbial composition and faecal characteristics in 36 healthy, formula-fed infants (average age 7.7 months) given 3 different daily dosages of native inulin (0.75 g/day, 1.00 g/day, and 1.25 g/day) were studied. At all levels of inulin consumption, a significant (p<0.05) reduction of potential pathogenic microorganisms such as clostridia was found. An intake of 1.25 g/day of inulin caused a significant (p<0.05) increase of Bifidobacterium spp. as well as a significant (p<0.05) decline in Gram-positive cocci and coliform bacteria. Inulin consumption resulted in a significant (p<0.05) decrease in faecal pH value and changes in faecal weight, faecal texture and colour, indicating improvement in healthy bile production and bacterial fermentation. It is concluded that inulin consumption in formula-fed infants after weaning positively affected the microbial composition of faeces and faecal properties.
Fulltext Angiotensin-Converting Enzyme (ACE) Inhibitors and Angiotensin Receptor Blockers (ARB) Are Protective Against ICU Admission and Mortality for Patients With COVID-19 Disease

ElAbd R, AlTarrah D, AlYouha S, Bastaki H, Almazeedi S, Al-Haddad M, et al.

Front Med (Lausanne), 2021;8:600385.
PMID: 33748156 DOI: 10.3389/fmed.2021.600385

Introduction: Corona Virus disease 2019 (COVID-19) caused by the Severe Acute Respiratory Syndrome coronavirus 2 (SARS-CoV-2) has become a global pandemic. The aim of this study was to investigate the impact of being on an Angiotensin-Converting Enzyme Inhibitors (ACEI) and/or Angiotensin Receptor Blockers (ARB) on hospital admission, on the following COVID-19 outcomes: disease severity, ICU admission, and mortality. Methods: The charts of all patients consecutively diagnosed with COVID-19 from the 24th of February to the 16th of June of the year 2020 in Jaber Al-Ahmed Al-Sabah hospital in Kuwait were checked. All related patient information and clinical data was retrieved from the hospitals electronic medical record system. The primary outcome was COVID-19 disease severity defined as the need for Intensive Care Unit (ICU) admission. Secondary outcome was mortality. Results: A total of 4,019 COVID-19 patients were included, of which 325 patients (8.1%) used ACEI/ARB, users of ACEI/ARB were found to be significantly older (54.4 vs. 40.5 years). ACEI/ARB users were found to have more co-morbidities; diabetes (45.8 vs. 14.8%) and hypertension (92.9 vs. 13.0%). ACEI/ARB use was found to be significantly associated with greater risk of ICU admission in the unadjusted analysis [OR, 1.51 (95% CI: 1.04-2.19), p = 0.028]. After adjustment for age, gender, nationality, coronary artery disease, diabetes and hypertension, ICU admission was found to be inversely associated with ACEI use [OR, 0.57 (95% CI: 0.34-0.88), p = 0.01] and inversely associated with mortality [OR, 0.56 (95% CI: 0.33-0.95), p = 0.032]. Conclusion: The current evidence in the literature supports continuation of ACEI/ARB medications for patients with co-morbidities that acquire COVID-19 infection. Although, the protective effects of such medications on COVID-19 disease severity and mortality remain unclear, the findings of the present study support the use of ACEI/ARB medication.
Fulltext Roles of Inorganic Oxide Based HTMs towards Highly Efficient and Long-Term Stable PSC-A Review

Shahinuzzaman M, Afroz S, Mohafez H, Jamal MS, Khandaker MU, Sulieman A, et al.

Nanomaterials (Basel), 2022 Aug 30;12(17).
PMID: 36080043 DOI: 10.3390/nano12173003

In just a few years, the efficiency of perovskite-based solar cells (PSCs) has risen to 25.8%, making them competitive with current commercial technology. Due to the inherent advantage of perovskite thin films that can be fabricated using simple solution techniques at low temperatures, PSCs are regarded as one of the most important low-cost and mass-production prospects. The lack of stability, on the other hand, is one of the major barriers to PSC commercialization. The goal of this review is to highlight the most important aspects of recent improvements in PSCs, such as structural modification and fabrication procedures, which have resulted in increased device stability. The role of different types of hole transport layers (HTL) and the evolution of inorganic HTL including their fabrication techniques have been reviewed in detail in this review. We eloquently emphasized the variables that are critical for the successful commercialization of perovskite devices in the final section. To enhance perovskite solar cell commercialization, we also aimed to obtain insight into the operational stability of PSCs, as well as practical information on how to increase their stability through rational materials and device fabrication.
Fulltext Recovery of FTO coated glass substrate via environment-friendly facile recycling perovskite solar cells

Chowdhury MS, Rahman KS, Selvanathan V, Hasan AKM, Jamal MS, Samsudin NA, et al.

RSC Adv, 2021 Apr 15;11(24):14534-14541.
PMID: 35423997 DOI: 10.1039/d1ra00338k

Organic-inorganic perovskite solar cells (PSCs) have recently emerged as a potential candidate for large-scale and low-cost photovoltaic devices. However, the technology is still susceptible to degradation issues and toxicity concerns due to the presence of lead (Pb). Therefore, investigation on ideal methods to deal with PSC wastes once the device attains its end-of-life is crucial and to recycle the components within the cell is the most cost effective and energy effective method by far. This paper reported on a layer-by-layer extraction approach to recycle the fluorine-doped tin oxide (FTO) coated glass substrate which is the most expensive component in the device architecture of mesoporous planar PSC. By adapting the sequential removal of each layer, chemical properties of individual components, including spiro-OMeTAD and gold can be preserved, enabling the material to be easily reused. It also ensured that the toxic Pb component could be isolated without contaminating other materials. The removal of all individual layers allows the retrieval of FTO conductive glass which can be used in various applications that are not only restricted to photovoltaics. Comparison of electrical, morphological and physical properties of recycled FTO glasses to commercial ones revealed minimal variations. This confirmed that the recycling approach was useful in retrieving the substrate without affecting its physicochemical properties.
Fulltext Psychometric evaluation of Oral Mucositis Daily Questionnaire: A cross-cultural adaptation of the Malay version in multiethnic adult autologous stem cell transplant

Wong SP, Tan SM, Danaee M, Muhamad K, Jamal M, Islahudin F, et al.

Asia Pac J Oncol Nurs, 2023 Feb;10(2):100180.
PMID: 36880090 DOI: 10.1016/j.apjon.2022.100180

OBJECTIVE: Mucositis is one of the most feared side effects of cancer treatment. Psychometric analysis of a patient self-assessment score, the oral mucositis daily questionnaire in Malay (OMDQ-Mal) and its construct validity by means of confirmatory factor analysis (CFA) is lacking. This research aimed to test the validity and reliability of OMDQ-Mal.
METHODS: A total of 114 autologous stem-cell transplantation patients aged ≥ 18 years old at a national hematology center in Malaysia from April 2019 to December 2020 completed OMDQ-Mal concurrently with physician scores. Internal consistency and reproducibility were determined by Cronbach alpha and intraclass correlation coefficient, respectively. Correlations with physician scores were determined by Spearman correlation. Discriminative validity and construct validity were determined by Mann-Whitney U and CFA, respectively.
RESULTS: OMDQ-Mal demonstrated high internal consistency (α = 0.874). Test-retest reliability between paired days were moderate to excellent (95% CI = 0.676-0.953). Items in OMDQ-Mal had moderate to strong correlations with physician scores (ρ = 0.503-0.721). Discriminative validity indicated that the scores of scales were significantly different between participants with severe and mild conditions. Construct validity results of loading factors 0.708-0.952; composite reliability 0.879-0.974; average variant extracted 0.710-0.841; and heterotrait-monotrait ratio 0.528 established the convergent and divergent validity.
CONCLUSIONS: In conclusion, the OMDQ-Mal, which captured important quality of life responses, demonstrated adequate validity and reliability. This was supported by a two-component model CFA. The strong correlation of OMDQ-Mal with both physician scores indicated its potential as a comprehensive patient-reported outcome measure of mucositis of the entire alimentary tract.
Fabrication and performance evaluation of polymeric membrane using blood compatible hydroxyapatite for artificial kidney application

Zaman SU, Saif-Ur-Rehman, Zaman MKU, Rafiq S, Arshad A, Khurram MS, et al.

Artif Organs, 2021 Nov;45(11):1377-1390.
PMID: 34152645 DOI: 10.1111/aor.14020

In the current study, a phase inversion scheme was employed to fabricate hydroxyapatite (HA)/polysulfone (PSF)-based asymmetric membranes using a film applicator with water as a solvent and nonsolvent exchanging medium. Fourier Transform Infrared (FTIR) and X-ray diffraction (XRD) spectroscopic studies were conducted to confirm the bonding chemistry and purity of filler. The inherent thick nature of PSF generated sponge-like shape while the instantaneous demixing process produced finger-like pore networks in HA/PSF-based asymmetric membranes as exhibited by scanning electron microscope (SEM) micrographs. The FTIR spectra confirmed noncovalent weak attractions toward the polymer surface. The leaching ratio was evaluated to observe the dispersion behavior of HA filler in membrane composition. Hydrophilicity, pore profile, pure water permeation (PWP) flux, and molecular weight cutoff (MWCO) values of all formulated membranes were also calculated. Antifouling results revealed that HA modified PSF membranes exhibited 43% less adhesion of bovine serum albumin (BSA) together with >86% recovery of flux. Membrane composition showed 74% total resistance, out of which 60% was reversible resistance. Biocompatibility evaluation revealed that the modified membranes exhibited prothrombin time (PT), and thrombin time (TT) comparable with typical blood plasma, whereas proliferation of living cells over membrane surface proved its nontoxic behavior toward biomedical application. The urea and creatinine showed effective adsorption aptitude toward HA loaded PSF membranes.
Hydatigera taeniaeformis in urban rats (Rattus rattus) in Faisalabad, Pakistan

Alvi MA, Li L, Ohiolei JA, Qamar W, Saqib M, Tayyab MH, et al.

Infect Genet Evol, 2021 Aug;92:104873.
PMID: 33905888 DOI: 10.1016/j.meegid.2021.104873

Hydatigera taeniaeformis formerly referred to as Taenia taeniaeformis is a cestode of cats (definitive hosts) and rodents (intermediate hosts). The prevalence of the metacestode larval stage has been reported in rodents in many parts of the world even though the genetic polymorphisms or intraspecies variation is still understudied. Here, we report a prevalence of 22.09% (38/172) from an urban rodent population in Pakistan and a nucleotide diversity (cox1) of 0.00463 among the population. Infection was higher in male (27.85%) and adult (32.29%) rats than female and sub-adult/young rats. Interestingly, The median-joining network and phylogenetic construction comprising isolates from China, Japan, Kenya, Laos, Malaysia, Senegal, the United Arab Emirates, and countries in Europe demonstrated that Pakistani H. taeniaeformis are closer to Asian and African population than those of European origin. The results of the study will add-in preliminary data for H. taeniaeformis and will also contribute to understand the global molecular epidemiology and population structure of H. taeniaeformis.

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