Showing papers by "University of Malaya published in 1986"
TL;DR: In this paper, it was shown that the Bache Nepper-Christensen model for concrete strength works well when adapted to moduli of elasticity, and that the elasticity and Poisson's ratio in tension are equal to those in compression.
138 citations
TL;DR: In this paper, the notion of a conflict between two subsystems, logical and linguistic, is used in a developmental perspective to account, in a unified manner, for the observed discrepancy between subjects' behavior in deductive and inductive reasoning tasks and predictions based on formal logic.
Abstract: After a review of recent work connected with Grice's maxims of conversation, special attention is paid to the principles related to the concept of informativeness. The operation of those principles constrains logic by limiting the meaning of logical particles and, more importantly, by contradicting axioms and many theorems of the propositional calculus. It is argued that, as the development of the individual's formal operations proceeds, a conflict with laws of language use arises. The notion of a conflict between two subsystems, logical and linguistic, is used in a developmental perspective to account, in a unified manner, for the observed discrepancy between subjects' behavior in deductive and inductive reasoning tasks and predictions based on formal logic.
75 citations
TL;DR: In this paper, the feasibility of the POME electroflotation process was determined by monitoring the effluent quality as a function of electrolysis time, and the results showed that about 40% of the dissolved substances of POME could be anodically destroyed together with 86% of suspended particles, made up of mainly plant cell debris.
55 citations
TL;DR: Two cases of unilateral absent tube and ovary discovered incidentally during laparoscopy are presented, which are very rare, occurring in only one in 11241 females.
55 citations
TL;DR: In this article, the authors presented two simple non-Gaussian first-order autoregressive markovian Markovian processes which are easy to simulate via a computer and were constructed according to the stochastic difference equation Xn:=Vn:Xn−1+∊n:, where ∊n:} is an i.i.d.
Abstract: This paper presents two simple non-Gaussian first-order autoregressive markovian processes which are easy to simulate via a computer. The autoregressive Gamma process {Xn:} is constructed according to the stochastic difference equation Xn:=Vn:Xn−1+∊n:, where {∊n:} is an i.i.d. Exponential sequence and {Vn:} is i.i.d. with Power-function distribution defined on the interval [0,1). The autoregressive Weibull process {Xn:} is constructed from the probabilistic model Xn:= k.min (Xn−1:, Yn:) where {Yn:} is an i.i.d. Weibull sequence and k > 1.
48 citations
TL;DR: In this article, synthesis and spectroscopic data are presented for R3SnIV compounds, where R is predominantly p-tolyl, of the following types: R 3SnX·L (X = Cl, Br or NCS; L = neutral, monodentate oxygen donor), R 3snY (YH = 1,2,4-triazole, N-phenyl-N-benzoylhydroxamic, succinanilic, levulinic and hippuric acids) and [R3SnL2
39 citations
TL;DR: This work describes a method using intracerebral inoculation of immobilized fourth instar of Toxorhynchites splendens larvae for the isolation of dengue viruses from clinical specimens which yields results within a few days following incubation at 32 degrees C.
38 citations
TL;DR: Leuconotis eugenifolia and L .
34 citations
TL;DR: During fruit development of oil palm (Elaeis guineensis) oil deposition in the mesocarp startedca12–13 weeks after flowering (WAF) and continued until the fruit ripened at 20 WAF and over the next 1–2 weeks oil continued to be deposited but the fruit became loose and readily detached from the bunch.
34 citations
TL;DR: Chromatographic separation of the alkaloid fraction of the methanol extract from the stem bark of Pseuduvaria macrophylla resulted in the isolation of 1,2,3-trimethoxy-4,5-dioxo-6a,7-dehydroaporphine, together with possibly the known O -methylmoschatoline.
30 citations
TL;DR: Embryological and cytological studies on some members of the Dipterocarpaceae were undertaken and for the first time embryological studies have conclusively demonstrated reproduction by agamospermy in 5.
TL;DR: In this paper, the kinetics of the epoxidation of natural rubber latex stabilized by hexadecyltrimethyl-ammonium chloride were studied at 3, 15 and 25°C by the sampling technique.
TL;DR: In this article, the tin atom was determined by direct methods and refined to a final R value of 0.031 for 3736 observed Mo-Kα reflections, and the structure was shown to have a 9.2,2′-Bipyridyldichlorodi(p-tolyl)tin(IV), C24H22N2Cl2Sn, crystallizes in the monoclinic space group P21/c.
TL;DR: Two new aristolactams named as enterocarpam-I and enterocarambam-II have been isolated and characterized from the stem bark of Orophea enterocalarpa as discussed by the authors.
TL;DR: Assessment of the permanganate reaction and AA positivity of amyloid deposits can reliably differentiate secondary from primary amyloidsosis and may contribute significantly to selection of patients for appropriate therapy.
TL;DR: The enzyme contents of four venom samples of Calloselasma rhodostoma were analyzed and there is significant variation in the contents of coagulant enzyme, arginine ester hydrolase, hyaluronidase, protease, phosphodiesterase, alkaline phosphomonoesterase and L-amino acid oxidase activities.
TL;DR: Glutathione S-transferase can be detected in both terrestrial and aquatic molluscs and was found to be present not only in the soluble fraction but also in the microsomes and mitochondria.
Abstract: 1. 1. Glutathione S-transferase can be detected in both terrestrial and aquatic molluscs. The enzyme is ubiquitiously distributed in the tissues of the mollusc, Achatina fulica. 2. 2. The kidney has the highest amount of activity on per gram basis when compared to other organs. 3. 3. The enzyme was found to be present not only in the soluble fraction but also in the microsomes and mitochondria. 4. 4. 100,000g supernatants from kidney homogenates contain isoenzymes that bind to both DEAE-Sephadex and CM-Cellulose columns. 5. 5. Such supematants can be resolved into four acidic and one basic form by isoelectric focussing. 6. 6. The enzyme is able to conjugate GSH on to DNCB, methyl iodide and p-nitrobenzyl chloride while it is unable to do the same with 1,2-epoxy-3-(p-nitrophenoxy) propane and ethacrynic acid. 7. 7. The molecular weight of the enzyme is about 40,000 daltons.
TL;DR: In this paper, a generalisation of the binomial negative non centree is proposed, which is defined as a convolution of variables binomiales negatives and pseudo-binomiales.
Abstract: On considere une generalisation de la loi binomiale negative non centree qui est une convolution des variables binomiales negatives et pseudo-binomiales
TL;DR: The meiotic sterility test of hybrids identified the Oncom cultures as N. intermedia Tai and not N. sitophilia as previously assumed, however, all theOncom isolates except one (H2118) differed from wild N.intermedia collected from remains of burnt vegetation.
TL;DR: It is shown that for supersymmetry to be manifest at nonzero temperatures, the thermal averages of all the auxiliary fields must vanish, and it therefore follows that broken supers asymmetry at zero temperature is never restored.
Abstract: It is shown that for supersymmetry to be manifest at nonzero temperatures, the thermal averages of all the auxiliary fields must vanish. It therefore follows that broken supersymmetry at zero temperature is never restored. But supersymmetry that is manifest at zero temperature may or may not be broken at nonzero temperatures. Several illustrative examples are considered.
TL;DR: The concept of madina, as religious centre, administrative capital and economic pivot for a society, state or kingdom, expressed in the Islamic concept of Madina (Gibbs and Kramers 1961: 291; Lapidus 1969: 69) pre-dates Muslim influence in Southeast Asia as mentioned in this paper.
Abstract: The concept of the city as religious centre, administrative capital and economic pivot for a society, state or kingdom, expressed in the Islamic concept of madina (Gibbs and Kramers 1961: 291; Lapidus 1969: 69) pre-dates Muslim influence in Southeast Asia. The physical as well as functional characteristics of the Southeast Asian city, deriving from its urban features, as distinct from its rural surroundings, were a culmination of gradual evolution since the rise, about the middle of the second century A.D., of the first trading ports and cities. The distinction between the city as urban centre and its rural surroundings is attested in the traditional Javanese view of the negara. In the fourteenth century Nawanatya the negara is defined as ‘all where one can go out (of his compound) without passing through paddy fields’ (Pigeaud 1960, 3: 121). It is by virtue of their evolutionary origins through their total symbiosis with the surrounding rural peripheries that Middle-Eastern and Southeast Asian cities, even pre-dating Islam, contrasted significantly with the cities of Medieval Christendom with formally constituted municipal laws and corporate institutions (Hourani 1970: 15).1 The pre-eminence of cities in their composite role as capitals for religious, political and economic activity was a significant feature of the historical evolution of pre-modern Southeast Asia and will constitute the definition of a city within the purview of this survey.
TL;DR: Column chromatographic and GCMS analyses for minor and trace noncarotenoid hydrocarbons of crude palm oil and palm fatty acid distillate revealed the presence of a wide range of n-alkanes (C12H26 to C36H74) and nalkenes in addition to the major component, squalene as discussed by the authors.
Abstract: Column chromatographic and gas chromatographic-mass spectroscopic (GCMS) analyses for minor and trace noncarotenoid hydrocarbons of crude palm oil and palm fatty acid distillate revealed the presence of a wide range of n-alkanes (C12H26 to C36H74) and n-alkenes in addition to the major component, squalene. Hydrocarbon components concentrated in palm fatty acid distillate where squalene was dominant, but degradation products such as alkenes (from fatty acids or glycerides), aromatic hydrocarbons (from carotenes) and diterpene hydrocarbons (from tocotrienols) were detected in significant quantities, superseding the naturally occurring n-alkanes. Mechanisms proposed suggest that degradation of the valuable vitamin E or tocotrienols needs to be minimized in physical refining.
TL;DR: Aerobic pretreatment of palm oil mill effluent (POME) greatly reduces the C, NO3 and NH4 content of POME but increases the organic N and pH as mentioned in this paper.
TL;DR: In this article, the authors discuss the method of Liu Hui (3rd century) for evaluating the ratio of the circumference of a circle to its diameter, now known as π.
TL;DR: In this article, it was shown that if the two blocks of a connected graph G are H and K2, then G is chromatically unique if and only if H is vertex-transitive and chromatic unique.
Abstract: We proved that if a connected graph is chromatically unique, then it has at most two blocks. Furthermore each of these blocks is vertex-transitive and chromatically unique. It is then shown that if the two blocks of a connected graph G are H and K2, then G is chromatically unique if and only if H is vertex-transitive and chromatically unique. This answers a conjecture of Whitehead and Zhao in the affirmative.
TL;DR: Soldier defense secretions of the genusHospitalitermes were chemically analyzed by GC-MS and were found to contain volatile monoterpenes and polyoxygenated diterpenes, indicating that colonies of this species can be separable into two chemically distinct groups.
Abstract: Soldier defense secretions of the genusHospitalitermes (Isoptera, Termitidae, Nasutitermitinae) were chemically analyzed by GC-MS and were found to contain volatile monoterpenes and polyoxygenated diterpenes. Interspecific and intraspecific chemical variations forH. umbrinus, H. hospitalis, H. flaviventris, andH. bicolor are described. Interspecific variations in monoterpene and diterpene structures and compositions were evident. A remarkable example of large intraspecific variation from a single species was observed inH. umbrinus, indicating that colonies of this species can be separable into two chemically distinct groups. The diterpenes found in one of these groups have unusually high molecular weights.
TL;DR: A brain abscess due to Pseudomonas pseudomallei is presented and the importance of early diagnosis and prompt treatment with prolonged antibiotic therapy is emphasised.
Abstract: A brain abscess due to Pseudomonas pseudomallei is presented. Central nervous system involvement in melioidosis is rare and generally occurs in association with disseminated infection. The importance of early diagnosis and prompt treatment with prolonged antibiotic therapy is emphasised.
TL;DR: In this paper, a bivariate generalisation of the non-central negative binomial distribution is considered, which is constructed as a latent structure model, as an extension of an accident proneness model investigated by Edwards/Gurland (1961), and as a reversible stochastic counter model.
Abstract: Another bivariate generalisation (Type V) of the non-central negative binomial distribution is considered. This generalisation is constructed (i) as a latent structure model; (ii) as an extension of an accident proneness model investigated by Edwards/Gurland (1961); and (iii) as a reversible stochastic counter model. The third construction gives, as a result, an apparently new formulation of the Edwards/Gurland model. The probabilities, moments, recurrence formulas and some properties are given. An application to the data used by Holgate (1966) is considered.
TL;DR: In this article, a 7-hydroxyaporphine, dasymachaline, having the cis H-6a and H-7 configuration has been isolated from the leaves Desmos DasymACHalus together with the known alkaloid dicentrinone.