Displaying publications 1 - 20 of 99 in total

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  1. Yusof MA, Ali HM
    Radiat Prot Dosimetry, 2011 Jul;146(1-3):38-41.
    PMID: 21729940 DOI: 10.1093/rpd/ncr102
    Planning and preparation in advance for radiological emergencies can help to minimise potential public health and environmental threats if and when an actual emergency occurs. During the planning process, emergency response organisations think through how they would respond to each type of incident and the resources that will be needed. In Malaysia, planning, preparation for and response to radiological emergencies involve many parties. In the event of a radiological emergency and if it is considered a disaster, the National Security Council, the Atomic Energy Licensing Board and the Malaysian Nuclear Agency (Nuclear Malaysia) will work together with other federal agencies, state and local governments, first responders and international organisations to monitor the situation, contain the release, and clean up the contaminated site. Throughout the response, these agencies use their protective action guidelines. This paper discusses Malaysian preparedness for, and response to, any potential radiological emergency.
  2. Rizal MR, Ali HM, Ng SW
    PMID: 21202448 DOI: 10.1107/S1600536808011975
    The Ni atom in the crystal structure of the centrosymmetric title compound, [Ni(C(19)H(15)N(6)S)(2)]·2C(2)H(6)OS, is N,S-chelated by the deprotonated Schiff bases in a square-planar geometry. The -CH=N-N=C(S)-NH-N=CH- frament is planar. The two indolyl -NH (donor) sites inter-act with dimethyl sulfoxide mol-ecules to furnish a layer motif.
  3. Rizal RM, Ali HM, Ng SW
    PMID: 21202401 DOI: 10.1107/S1600536808011082
    The mol-ecules of the title compound, C(10)H(10)N(4)S, are linked by N-H(indole)⋯S hydrogen bonds to form a linear hydrogen-bonded chain. There are two independent mol-ecules in the asymmetric unit.
  4. Rizal MR, Ali HM, Ng SW
    PMID: 21202400 DOI: 10.1107/S160053680801101X
    In the essentially planar title mol-ecule, C(10)H(9)BrN(4)S, the C=N double bond is in a trans configuration. In the crystal structure, the S atom acts as a hydrogen-bond acceptor for the aromatic NH, aliphatic NH and terminal NH(2) groups of three symmetry-related mol-ecules, forming a weak hydrogen-bonded layer structure.
  5. Rizal MR, Ali HM, Ng SW
    PMID: 21201898 DOI: 10.1107/S1600536808003164
    The molecule of the title compound, C(18)H(14)N(4), lies on a center of inversion such that there is one half-mol-ecule in the asymmetric unit. The N-N single bond adopts a trans configuration and the indole fused-ring system is nearly coplanar with the -CH=N-N=CH- fragment [dihedral angle = 9.8 (2)°]. Adjacent mol-ecules are linked by indole-azine N-H⋯N hydrogen bonds into a layer motif.
  6. Rizal MR, Ali HM, Ng SW
    PMID: 21202507 DOI: 10.1107/S1600536808014293
    The Ni atom in the centrosymmetric title compound, [Ni(C(10)H(9)N(4)S)(2)], is N,S-chelated by the deprotonated Schiff bases in a square-planar geometry. The -CH=N-N=C(S)-NH(2) frament is planar. Adjacent mol-ecules are linked by hydrogen bonds between the indolyl -NH (donor) site and the double-bond =N- (acceptor) site of an adjacent mol-ecule, forming a layer motif.
  7. Khaledi H, Olmstead MM, Fukuda T, Ali HM
    Inorg Chem, 2014 Nov 3;53(21):11348-50.
    PMID: 25320842 DOI: 10.1021/ic5019828
    Three isomeric 2[Pd(II)-Ni(II)] metal complexes, derived from indoleninyl meso-substituted dibenzotetraaza[14]annulene, were synthesized. The resulting dimers feature Ni···Ni or, alternatively, Ni···π interactions in staggered or slipped cofacial structures. A remarkable insertion of palladium into two different C-H bonds yielded a 4[Pd(II)-Ni(II)] rectangular complex with dimensions of 8.73 × 10.38 Å.
  8. Hashim H, Mughrabi FF, Ameen M, Khaledi H, Ali HM
    Molecules, 2012 Aug 03;17(8):9306-20.
    PMID: 22864239 DOI: 10.3390/molecules17089306
    Indolic compounds have attracted a lot of attention due to their interesting biological properties. The present study was performed to evaluate the subacute toxicity and anti-ulcer activity of BClHC against ethanol-induced gastric ulcers. Experimental animal groups were orally pre-treated with different doses of BClHC (50, 100, 200 and 400 mg/kg) in 10% Tween 20 solution (vehicle). Blank and ulcer control groups were pre-treated with vehicle. The positive group was orally pretreated with 20 mg/kg omeprazole. After one hour, all groups received absolute ethanol (5 mL/kg) to generate gastric mucosal injury except the blank control group which was administered the vehicle solution. After an additional hour, all rats were sacrificed, and the ulcer areas of the gastric walls determined. Grossly, the ulcer control group exhibited severe mucosal injury, whereas pre-treatment with either derivative or omeprazole resulted in significant protection of gastric mucosal injury. Flattening of gastric mucosal folds was also observed in rats pretreated with BClHC. Histological studies of the gastric wall of ulcer control group revealed severe damage of gastric mucosa, along with edema and leucocytes infiltration of the submucosal layer compared to rats pre-treated with either BClHC or omeprazole where there were marked gastric protection along with reduction or absence of edema and leucocytes infiltration of the submucosal layer. Subacute toxicity study with a higher dose of derivative (5 g/kg) did not manifest any toxicological signs in rats. In conclusions, the present finding suggests that benzyl N'-(5-chloroindol-3-ylmethylidene)hydrazinecarbodithioate promotes ulcer protection as ascertained by the comparative decreases in ulcer areas, reduction of edema and leucocytes infiltration of the submucosal layer.
  9. Salga MS, Ali HM, Abdulla MA, Abdelwahab SI
    Int J Mol Sci, 2012;13(2):1393-404.
    PMID: 22408397 DOI: 10.3390/ijms13021393
    The current study described the synthesis and the in vivo acute oral toxicity evaluations in Sprague Dawley rats. The compounds were characterized by elemental analyses, LC-MS, FTIR, (1)H NMR, (13)C NMR and UV-visible spectroscopy. In the acute toxicity study, a single administration of the compounds was performed orally to the rats at the single doses of 2000 mg/kg and they were then monitored for possible side effects, mortality or behavioral changes up to 14 days. The serum level of aspartate (AST), alanine aminotransferases (ALT), alkaline phosphate (ALP), triglyceride, high density lipoprotein (HDL), immunoglobulins (GAM) and the C-reactive proteins did not significantly change. The hematological indices white blood cells (WBC), haematocrit (HCT), red blood cells (RBC), mean corpuscular volume (MCV), mean corpuscular haemoglobin concentration (MCHC), and mean corpuscular hemoglobin (MCH) were within the normal range. The renal function indices examined were also within the reference range. Generally, the compounds exhibited low toxic effects as required for further in vivo therapeutic studies.
  10. Suleiman Gwaram N, Khaledi H, Ali HM, Olmstead MM
    Acta Crystallogr C, 2011 Jan;67(Pt 1):o6-9.
    PMID: 21206084 DOI: 10.1107/S0108270110046317
    The title compound, C(4)H(6)N(4)O·H(2)O, crystallized simultaneously as a triclinic and a monoclinic polymorph from an aqueous solution of 2,4-diaminopyrimidin-6-ol. Previously, an orthorhombic polymorph was isolated under the same experimental conditions. The molecular geometric parameters in the two present polymorphs and the previously reported orthorhombic polymorph are similar, but the structures differ in the details of their crystal packing. In the triclinic system, the diaminopyrimidinone molecules are connected to one another via N-H···O and N-H···N hydrogen bonding to form infinite chains in the [011] direction. The chains are further hydrogen bonded to the water molecules, resulting in a three-dimensional network. In the monoclinic system, the diaminopyrimidinone molecules are hydrogen bonded together into two-dimensional networks parallel to the bc plane. The water molecules link the planes to form a three-dimensional polymeric structure.
  11. Abdul Halim SN, Ali HM, Ng SW
    PMID: 21588862 DOI: 10.1107/S1600536810039516
    In the title compound, [Mn(C(13)H(8)N(3)O(3))(2)]·C(3)H(7)NO·H(2)O, the metal atom is O,N,O'-chelated by two deprotonated Schiff bases and exists in a distorted octa-hedral geometry. The N-H groups, the carbonyl group of the DMF mol-ecule and the uncoord-inated water mol-ecule engage in N-H⋯O and O-H⋯O hydrogen-bonding inter-actions, generating a hydrogen-bonded ribbon that propagates along [110].
  12. Abdul Halim SN, Ali HM, Ng SW
    PMID: 21588861 DOI: 10.1107/S1600536810039504
    The metal atom of the title compound, [Zn(C(13)H(8)N(3)O(2)S)(2)]·C(3)H(7)NO·H(2)O, is O,N,O'-chelated by two deprotonated Schiff bases and it exists in a distorted octa-hedral geometry. The N-H groups of the ligands, the carbonyl group of the DMF mol-ecule and uncoordinated water mol-ecule engage in N-H⋯O and O-H⋯O inter-actions, generating a hydrogen-bonded ribbon that propagates along [110]. One thienyl ring is disordered over two positions in a 1:1 ratio.
  13. Lee SM, Ali HM, Lo KM, Ng SW
    PMID: 21580251 DOI: 10.1107/S1600536810005829
    In the title compound, [Sn(C(6)H(11))(2)(C(19)H(14)N(2)O(3))], the Sn(IV) atom is O,N,O' chelated by the deprotonated Schiff base ligand and exists in a cis-trigonal-bipyramidal environment, completed by the two cyclohexyl ligands.
  14. Lee SM, Ali HM, Lo KM, Ng SW
    PMID: 21582002 DOI: 10.1107/S1600536809002943
    In the title ion-pair, C(22)H(29)Cl(2)N(4)O(2) (+)·C(2)F(3)O(2) (-), ammonium-carboxyl-ate N-H⋯O hydrogen bonds link two cations and two anions about a centre of inversion to generate a hydrogen-bonded tetramer. In the cation, one of the imino N atoms is protonated and donates a hydrogen bond to the O atom of the adjacent chloro-phenyl ring. The other imino N atom acts as a hydrogen-bond acceptor from a phenolate O atom.
  15. Lee SM, Ali HM, Lo KM, Ng SW
    PMID: 21582001 DOI: 10.1107/S1600536809002906
    In the toluene hemisolvated tripodal tris-(2-amino-ethyl)amine Schiff base, C(30)H(33)Cl(3)N(4)O(3)·0.5C(7)H(8), one of the three imino N atoms is protonated, forming a hydrogen bond with the O atom at an adjacent benzene ring. The other two imino N atoms act as hydrogen-bond acceptors from phenolate OH groups. The toluene solvent mol-ecule is disordered about a centre of inversion.
  16. Lee SM, Lo KM, Ali HM, Ng SW
    PMID: 21578975 DOI: 10.1107/S1600536809050661
    The title Schiff base, C(14)H(14)N(2)O(2), is close to being planar (r.m.s. deviation for the non-hydrogen atoms = 0.052 Å) and an intra-molecular N-H⋯O hydrogen bond generates an S(6) ring. In the crystal, the moleucles are linked by O-H⋯O hydrogen bonds, giving rise to helical chains propagating along the c axis of the tetra-gonal unit cell.
  17. Abdul Alhadi AA, Ali HM, Ng SW
    PMID: 21582611 DOI: 10.1107/S1600536809010563
    The benzohydrazide mol-ecule of the title compound, C(14)H(11)N(3)O(7)·H(2)O, is planar (r.m.s. deviation = 0.068 Å). The benzohydrazide mol-ecule and the uncoordinated water mol-ecule inter-act through O-H⋯O hydrogen bonds; these together with O-H⋯N and N-H⋯O hydrogen bonds form a three-dimensional network.
  18. Abdul Alhadi AA, Ali HM, Ng SW
    PMID: 21582613 DOI: 10.1107/S1600536809010812
    The benzohydrazide mol-ecule in the title dihydrate, C(14)H(11)ClN(2)O(5)·2H(2)O, is non-planar, with the two aromatic rings at either side of the -C(=O)-NH-N=CH- unit forming a dihedral angle of 29.7 (2)°. The benzohydrazide mol-ecule is linked to the water mol-ecules by O-H⋯O and N-H⋯O hydrogen bonds, with other O-H⋯O hydrogen bonds leading to a layer structure.
  19. Abdul Alhadi AA, Ali HM, Ng SW
    PMID: 21582612 DOI: 10.1107/S1600536809010575
    The benzohydrazide mol-ecule of the title compound, C(14)H(10)BrClN(2)O(5)·CH(3)OH, is non-planar, the two aromatic rings at either side of the -C(=O)-NH-N=CH- unit being twisted by 5.9 (1)°. The benzohydrazide mol-ecule is linked to the solvent mol-ecule by an O-H⋯O hydrogen bond. Mol-ecules are connected by further O-H⋯O hydrogen bonds and an N-H⋯O link into a two-dimensional array.
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