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Articles by Jumaat H. Adam
Total Records ( 9 ) for Jumaat H. Adam
  Jumaat H. Adam , Hafiza A. Hamid , Mohd Afiq Aizat Juhari , Siti Norhafizah Ahmad Tarmizi and Wan Mohd Razi Idris
  The study to determine the species composition and community structure of pitcher plants in Rantau Abang, Terengganu was carried out using plot method. Nepenthes gracilis was recorded in plots 1-3 at 10, 30 and 50 m, N. rafflesiana was recorded in P2 and N. ampullaria in P3. Nepenthes gracilis differs morphologically from the other two species by its sessile leaves, decurrent leaf base, angular stem shape, very thin peristome and partly glandular inner pitcher cavity wall. Nepenthes ampullaria differed by its panicle inflorescence, cuneate lids’ shape, narrower than the mouth glandless, lower lid surface, bearing up to 6-flowered bracteolate pedicels and urceolate lower pitcher. Nepenthes rafflesiana differed by infundibulate and ellipsoid upper and lower pitcher, densely glandular lower lid surface, toothed inner peristome margin. Population structures of these species comprised of seedlings, saplings and matured plants. These species consist of 52.61% of juvenile stage (seedlings and saplings) and 47.39% of matured stage. A total 5.68 and 2.84% of these species population bear male and female inflorescence. Morisita’s Index of Dispersion Pattern and Chi-square test showed that the dispersion pattern of all life stages of these species was significantly aggregated. Their Id values were from 1.12 to 3.78. Matured plants and sapling of N. gracilis recorded the lowest and biggest Id. These species grow in soil that is acidic and low organic matter content. Nepenthes gracilis grows in sandy loam, loam and sandy clay; Nepenthes ampullaria and Nepenthes rafflesiana grow in sandy clay and loam.
  Jumaat H. Adam and Hafiza A. Hamid
  A dichotomous key and description of five pitcher plants taxa recorded from Universiti Kebangsaan Malaysia Campus is given. In this study, a new species is Nepenthes sharifah-hapsahii Adam and Hafiza is describe. Three other species and one hybrid found here are Nepenthes gracilis Korthals, Nepenthes ampullaria Jack, Nepenthes mirabilis (Loureiro) Druce and Nepenthes x trichocarpa Miquel. Nepenthes sharifah-hapsahii is closely related to Nepenthes gracilis but differ in having cylindrical upper stem, lamina base attenuate into petiole like region and not wing, lower lid surface densely covered with nectar glands, digestive glands on inner cavity covered by extended epidermal roof, peristome ribs distinct and pedicels commonly 2-flowered. On the other hand Nepenthes gracilis has angular upper stem, sessile leaves, lamina base decurrent, wings extends almost into one internode, lower lid surface sparsely covered with nectar glands, digestive glands exposed and epidermal roof poorly developed, persitome rib not distinct and pedicels all 1-flowered. Nepenthes ampullaria differs from the other taxa in having lower pitcher which is urceolate in shape, inner pitcher cavity wholly covered with digestive glands, lower lid surface not covered by nectar glands, paniculate inflorescence and pedicels commonly with 3-flowered and subtended by bract. Nepenthes mirabilis can be recognized and differentiated from the other species in having broad and flattened peristome and fimbriate leaves margin.
  Jumaat H. Adam and Hafiza A. Hamid
  Three species and two varieties of pitcher plants were recorded from Lambir Hill in Miri, Sarawak State of Malaysia. They were Nepenthes ampullaria Jack, Nepenthes gracilis Korthals, Nepenthes hookeriana Lindley, Nepenthes rafflesiana Jack var. subglandulosa Adam and Hafiza var. nova and Nepenthes mirabilis (Loureiro) Druce var. echinostoma (Hook fil) Adam and Wilcock. A dichotomous key to these taxa was given. Nepenthes ampullaria was found from 50 to 150 m. Nepenthes gracilis and Nepenthes rafflesiana var. subglandulosa was recorded at 100 m altitude but absent at 50 m altitude. Nepenthes hookeriana and Nepenthes mirabilis var. echinostoma were confined at altitude 50 m but were absent from altitude 100-150 m. These taxa can easily be identified by their morphological characters. Nepenthes ampullaria differs from the other species by possessing the paniculate inflorescence, bracteolate flowers, having only lower pitchers which is urceolate in shape, the lids sizes are distinctly smaller the mouth of the pitcher, lower lid surface glandless and trifid spurs Nepenthes gracilis differs from the other four taxa by it sessile leaves, leaves base being decurrent into two wings, the stem triangular in shape, inconspicuous peristome teeth, very thin peristome (≤1 mm) and inner surface of pitcher wall covered with exposed digestive glands. Nepenthes hookeriana differs from Nepenthes ampullaria by the present of both upper and lower pitchers in the former species and the absence of upper pitcher in the later species. Nepenthes hookeriana differs from Nepenthes gracilis by its cylindrical upper stem, infundibulate upper pitcher and inner pitcher cavity of both upper and lower pitchers covered with digestive glands; Nepenthes hookeriana can be distinguished from Nepenthes rafflesiana var. subglandulosa, Nepenthes mirabilis var. echinostoma by possessing inner pitcher cavity wall wholly covered with digestive glands and lower lid surface sparsely covered with honey glands. Nepenthes mirabilis var echinostoma strikingly differs from the other four taxa in having flattened and very thick peristome and the upper pitcher shape differentiate into tubulose upper half and infundibulate lower half.
  Jumaat H. Adam and Hafiza A. Hamid
  A dichotomous key and morphological descriptions and photographs of three species of pitcher plants recorded from Sabah were given. Nepenthes curtisii ssp. zakriana Adam and Wilcock is elevated to species level that is Nepenthes zakriana (Adam and Wilcock) Adam and Hafiza. A new species, Nepenthes naquiyuddinii Adam and Hafiza is described.
  Jumaat H. Adam , Abdul Manap Mahmud , Nurulhuda Edy Muslim , Hafiza A. Hamid and Masdahila Ahmad Jalaludin
  The purpose of this study was to carry out a vegetative study on the slope of Lok Kawi Hill. A total of 12 plots were laid between 20 to 350 m altitude on the slope of lowland hilly forest at Lok Kawi in Sabah State of Malaysia. These plots were subjected to cluster analysis using Ward Linkage Method (WLM) and Euclidean Distance Measurement (EDM). This similarity analysis classified them into five cluster groups (CGS). These CGS, denoted by three most dominant species in term of importance value were respectively named as Hevea brasiliensis-Parastemon urophyllum-Antidesma ghaesembilla Association (CGI); Chionanthus pachyphyllus-Parastemon urophyllum-Adinandra dumosa Association (CGII); Pithecellobium ellipticum-Calophyllum inophyllum-Arenga undulatifolia Association (CGIII); Calophyllum inophyllum-Croton oblongus-Cratoxylum arborescens Association (CG IV) and Oncosperma tigillarium-Sarcotheca glauca-Calophyllum inophyllum Association (CG V). The species diversity of these CGS were relatively poor. CGII and CGIII were each represented by 19 species, whereas CGIV, CGI and CGV comprised of 18, 10 and 6 species. In term of Basal Area Contribution (BAC), CGIII recorded the highest BAC, followed by CGII, CGIV, CGI and CGV. Density of trees between CGS was recorded highest in CGII, followed by CGIV, CGIII, CGI and CGV. Based on the species composition, CGI is an abandoned rubber plantation; CGII is a coastal vegetation with the presence of Oncosperma tigillarium; CGIII is a disturbed primary forest with the presence of Macranga hypoleuca, Macaranga gigantea and Mallotus paniculatus; CGIV is a disturbed primary forest with the presence of Vernonia arborea, Adinandra dumosa, Vitex pubescens and Macranga triloba; CGV is a disturbed primary forest with the presence of Macaranga gigantea. The value of species diversity differed between CGS. CGII have the highest R, H and E-values, 2.12, 2.393 and 0.813, followed by CGIII, CGIV, CGI and CGV. CGV possessed the lowest R, H and E-values among the five CGS that is 0.96, 0.814 and 0.454.
  Sumaia M.M. Bakoush , Wan A. Yaacob , Jumaat H. Adam and Nazlina Ibrahim
  Rafflesia cantleyi is locally known as Bunga Pakma has been used in Malaysian folk medicine by men as an energy drink or an aphrodisiac. However, there has been no evaluation of the effect of the repeated dosing of R. cantleyi bud. The current work was undertaken to evaluate the acclaimed aphrodisiac activity of R. cantleyi bud on male rats. The 40 adult male rats were divided into 4 groups (n =10 per group/dose). Rats in group A (control) were administered with 1 mL of distilled water while those in groups B, C and D were given same volume containing 250, 500 and 1000 mg kg–1 b.wt., of R. cantleyi bud water extract, respectively for 28 days. The effect of the extract on body weight, reproductive organ weight and serum testosterone concentration were determined. Sexual behavior parameters were monitored in male rats for weekly mounting test and on day 28 by pairing with a receptive female (1:1). The results revealed that the R. cantleyi bud water extract significantly increase body weight and serum testosterone content (p<0.05). Moreover, the bud extract markedly influence the orientation behavior of treated animals which showed more attraction towards female rats. Sexual behavior observations on the animals result revealed presence of precopulatory and copulatory behaviors (chasing, sniffing and mounting) by the tested male rats. The extract at doses 250, 500, 1000 mg kg–1 b.wt. significantly increase the frequency of mount and intromission (p<0.05). In addition, the ejaculation latency was significantly prolonged. The mount and intromission latencies were reduced significantly whereas ejaculation frequency significantly increased (p<0.05). Computed percentage of mounted, intromitted, ejaculated, index of libido and copulatory efficiency were higher in treated group compared to control group. The present study demonstrates that water extract of R. cantleyi bud increases testosterone level and enhances sexual behavior in male rats. The dose taken must be cautiously monitored.
  Jumaat H. Adam
  A total of 1255 pitcher plants belonging to two species were recorded from 11 plots set between 2610 m to 2970 m altitude on Mount Kinabalu, each with an area of 0.01 hectare. Of these plants, 1180 (94%) belonged to Nepenthes villosa, followed by N. kinabaluensis contained 75 (6%) plants. The density of N. villosa and N. kinabaluensis ranged from 0 to 260 and 0 to 65 plants respectively. Nepenthes villosa was recorded absent in P5, whereas N. kinabaluensis was recorded in P2, P3 and P11. Differences in density of both species between the study plots is influenced by combination of factors, which include topography, soil, habitat, different light intensities reaching the forest floor and water deficient due to exposure to wind and light intensities at higher altitudes. The Id values were greater than 1 for both species in all plots showing contagious dispersion pattern. Size class distribution and population structure varied for both species between plots. Generally there were more seedlings and juveniles than mature plants of both species at different elevations indicating regenerating populations. In mature plants there were more male than female plants in both species.
  Muhammad Barzani Gasim , Jumaat H. Adam , Mohd Ekhwan Hj Toriman , Sahibin Abd. Rahim and Hafizan Hj. Juahir
  Dungun is one of the seven districts in the Terengganu State, Malaysia, located between 4°36’10“to 4°53’02“N and 103°07’25“to 103°25’50“E. It occupies an area stretching from hilly region in the western to coastal plain in the eastern. Topographically the Dungun district comprises 35% lowland area, 20% swamp and other water bodies and 45% forest reserves. The forest reserve area occupies the hilly region that is found scattered from beach to inland areas. Flood occurs almost every year in Dungun district. During flood, Dungun and its surrounding area was inundation by coastal flood water up to 1.50 m depth. The floods were caused either by tidal surges from the ocean or direct runoff from the rivers. Storm surges cause widespread devastation to low-lying coastal areas. Monsoon season in the east coast of Peninsular Malaysia which includes Terengganu is influenced by Northeast monsoon, characterized by heavy rainfall commencing from October and end of March annually. Consequently, severe floods occur almost every year all over Terengganu between November and December. Four factors are identified and related to the occurrence of flood phenomenon in Terengganu: (1) High intensity of rainfall, (2) River regime, e.g., low water current, (3) Back water phenomenon and (4) Velocity and wind direction that opposed to the direction of river flow. The occurrence of flashflood everywhere has caused property damages and lost of life.
  Sumaia M.M. Bakoush , Wan A. Yaacob , Jumaat H. Adam and Nazlina Ibrahim
  Rafflesia cantleyi (Rafflesiaceae) is a parasitic flowering plant scarcely found in the Peninsular Malaysia. The bud of this plant is sought after by folk medicinal practitioner for various uses by men and women. Scientific evidences on this plant are however limited. In this study we explored the antioxidant activity, total phenolic content and the total flavonoid content of the aqueous extracts from R. cantleyi bud parts including disk, perigone tube and bract. The antioxidant activity was determined by employing three different systems including scavenging activity of 2, 2-diphenyl-1-picrylhydrazyl radicals (DPPH), hydrogen peroxide (H2O2 ) scavenging activity and Ferric Reducing Antioxidant Power (FRAP). The antioxidant activity of bract extract was higher than those of perigone tube and disk. Total phenolic and total flavonoids contents were significantly higher (p<0.05) in the bract compared to perigone tube and disk. Strong correlation between total phenolic and antioxidant properties was indicated. The result of this study showed that bract of R. cantleyi bud possesses significant free radical scavenging property with this antioxidant activity contributed by the phenolic compounds. The results supported the traditional medicinal use of the bract as energy drink which is due to its natural sources of antioxidants.
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