MyMedR

Displaying all 5 publications

Abstract:

Sort:

Fulltext Dichlorido{2-morpholino-N-[1-(2-pyri-dyl)ethyl-idene]ethanamine-κN,N',N''}cadmium

Ikmal Hisham N, Suleiman Gwaram N, Khaledi H, Mohd Ali H

Acta Crystallogr Sect E Struct Rep Online, 2010;66(Pt 11):m1471.
PMID: 21588887 DOI: 10.1107/S1600536810043163

In the title compound, [CdCl(2)(C(13)H(19)N(3)O)], the Cd(II) ion is five-coordinate, with the N,N',N''-tridentate Schiff base ligand 2-morpholino-N-[1-(2-pyrid-yl)ethyl-idene]ethanamine and two Cl atoms in a distorted square-pyramidal geometry. In the crystal structure, C-H⋯Cl hydrogen-bonding inter-actions connect the mol-ecules into a three-dimensional network.
Isolation and characterization of a mo -reducing bacterium

Ghani B, Takai M, Hisham NZ, Kishimoto N, Ismail AK, Tano T, et al.

Appl Environ Microbiol, 1993 Apr;59(4):1176-80.
PMID: 16348915

A Mo -reducing bacterium (strain 48), which grew on medium supplemented with 200 mM Mo, was isolated from stream water obtained from Chengkau, Malaysia. The chemical properties of strain 48 conform to the characteristics of Enterobacter cloacae. Under anaerobic conditions in the glucose-yeast extract medium containing phosphate ion (2.9 mM) and Mo (10 mM), the bacterium reduced Mo to form molybdenum blue. Approximately 27% of Mo added to the medium was reduced after 28 h of cultivation. The reduction of Mo with glucose as an electron donor was strongly inhibited by iodoacetic acid, sodium fluoride, and sodium cyanide, suggesting an involvement of the glycolytic pathway and electron transport in Mo reduction. NADH and N,N,N',N' -tetramethyl-p-phenylenediamine served as electron donors for Mo reduction. When NADH was used as an electron donor, at first cytochrome b in the cell extract was reduced, and then molybdenum blue was formed. Sodium cyanide strongly inhibited Mo reduction by NADH (5 mM) but not the reduction of cytochrome b in the cell extract, suggesting that the reduced component of the electron transport system after cytochrome b serves as an electron donor for Mo reduction. Both ferric and stannous ions strongly enhanced the activity of Mo reduction by NADH.
Mycobacterium senegalense catheter-related bloodstream infection

Badarol Hisham N, Madon M, Masri SN, Amin-Nordin S

BMJ Case Rep, 2024 Apr 30;17(4).
PMID: 38688568 DOI: 10.1136/bcr-2024-259761

Catheter-related bloodstream infection (CRBSI) is one of the common healthcare-acquired infections imposing a high burden of morbidity and mortality on the patients. Non-tuberculous mycobacterium is a rare aetiology for CRBSI and poses challenges in laboratory diagnosis and clinical management. This is a case of a woman in her early 60s with underlying end-stage renal failure, diabetes mellitus and hypertension presented with a 2-week history of high-grade fever postregular haemodialysis, vomiting, lethargy and altered mental status.Blood cultures from a permanent catheter and peripheral taken concurrently yielded Mycobacterium senegalense, identified by matrix-assisted laser desorption/ionisation time-of-flight mass spectrometry, which established the diagnosis of CRBSI atypically presented with concurrent acute intracranial bleeding and cerebrovascular infarction at initial presentation. She was started on a combination of oral azithromycin, oral amikacin and intravenous imipenem, and the permanent catheter was removed. Despite the treatments instituted, she developed septicaemia, acute myocardial infarction and macrophage activation-like syndrome, causing the patient's death.
Fulltext Subject-Specific Effect of Metallic Body Accessories on Path Loss of Dynamic on-Body Propagation Channels

Rahim HA, Abdulmalek M, Soh PJ, Rani KA, Hisham N, Vandenbosch GA

Sci Rep, 2016 07 20;6:29818.
PMID: 27436496 DOI: 10.1038/srep29818

This paper presents the investigation of path loss variation for subject-specific on-body radio propagation channels, considering the effect of metallic spectacles and loop like metallic accessories. Adding metallic items may affect the operability of Body Centric Wireless Communications (BCWC). Measurements were carried out in an RF-shielded room lined with microwave absorbing sheets for strategically placed bodyworn antennas covering the upper front torso and the lower limbs. The path loss of the on-body radio channel was characterized explicitly taking into account the body size of the subjects. For metallic loop-like accessories, the results indicate that for underweight subjects, there was a slightly higher influence, up to 2%, compared to normal and overweight subjects. Our findings indicate that a noticeable effect exists on on-body channels for dynamic movements where the metallic watch acts as a local scatterer that affects the non-line-of-sight (NLOS) signal path between transmitter and receiver for underweight subjects in comparison to normal and overweight subjects. The path loss decreases when the receiving terminal was positioned very close to the metallic item. If a loop-like metallic accessory is not appropriately considered when designing the radio channel on a subject, the reliability of the body-centric wireless system may degrade.
Clinicopathological correlation of oral candidiasis - Our experience in a tertiary centre over two decades

Tan CC, Lim D, Mohd Hisham NQ, Elias NA, Azli AS, Goh YC

Malays J Pathol, 2023 Aug;45(2):237-246.
PMID: 37658533

INTRODUCTION: Oral candidiasis is one of the most common fungal infections that has been widely reported around the world. In Malaysia, the available studies for this infection are scarce.
MATERIALS AND METHODS: This is a 20-year retrospective study aimed to investigate the prevalence, demographic characteristics, clinical presentations, and the association of oral candidiasis with clinical parameters in oral candidiasis cases reported in the Faculty of Dentistry, Universiti Malaya from 1999 until 2019. A total of 12,964 histopathological records from the Oral Pathology Diagnostic and Research Laboratory (OPDRL) between 1999 to 2019 were retrieved. Oral candidiasis cases were selected according to the inclusion and exclusion criteria. Information of interest was obtained and analysed.
RESULTS: From the total records retrieved, 378 oral candidiasis cases were recorded and 82.8% were diagnosed from smear test. This study showed that oral candidiasis was predominantly reported in female (64.2%) and Indian population (64.2%). The peak incidence was in the sixth decades of life (27.0%). The most commonly affected site was tongue and coated tongue was the most common clinical presentation. More than 50% of the cases had comorbidity and 10.6% were associated with dentures. Ethnicity and site of occurrence were significantly associated (p<0.05) with oral candidiasis.
CONCLUSION: This is the first large-scale study of oral candidiasis cases in Malaysia. The findings of this study are useful for clinical assessment of patients suspected of oral candidiasis.