247 research outputs found
Vanilla norashikiniana R. Go et A. Raffi sp. nov., a new orchid species from Peninsular Malaysia
No full textA new species, Vanilla norashikiniana R. Go et A. Raffi, from Peninsular Malaysia is described and other aspects of interest discussed. It is so far known from a population in lower dipterocarp forests in Hutan Lipur Chemerong, Hulu Dungun, Terengganu and Hutan Simpan Semangkok, Selangor. A field key to the Peninsular Malaysian taxa (including Vanilla shenzhenica) is also provided
Electrochemical studies of carbon nanotube-reduced graphene oxide wrapped iron cobaltite for all-solid-state asymmetric supercapacitor / Akmal Arsyad Mohd Raffi
No full textSupercapacitors employing transition metal oxide electrodes exhibit larger specific capacitances and energy densities. However, transition metal oxides have smaller surface area, which limit the kinetic in redox reaction. Performance enhancement of the transition metal oxide electrodes can be achieved by incorporation of carbonaceous materials, to form composite electrode. However, incorporation of carbonaceous materials during the synthesis process can alter the morphology properties of the transition metal oxides. Iron cobaltite, FeCo2O4 with nanosheets morphology (FCO) was synthesized by hydrothermal method. It exhibits large specific surface area and pore volume, which enhances the loading and diffusion of ions within the electrode. Herein, we designed composite electrodes made up of FCO, reduced graphene oxide (rGO) and functionalized multi-walled carbon nanotubes (f-MWCNTs) while retaining the high specific surface area of the FCO nanosheets. The composite electrodes were prepared by a two-step hydrothermal process. The prepared composite electrodes were characterized for their structural, morphological, and electrochemical properties. The composite electrodes maintained the flower-like nanosheet structure of the pristine FCO. The electrochemical properties of FCO and its composites were examined by cyclic voltammetry (CV), galvanostatic charge discharge (GCD), and electrochemical impedance spectroscopy (EIS). At 3 A g-1, the composite electrode exhibits specific capacitance, Csp of 1797 F g-1 as compared with 943 F g-1 of the pristine FCO. The higher Csp of composites as compared to FCO is because high conductive f-MWCNT and rGO help in reducing the internal resistance of the electrode. However, excessive loading of f-MWCNT and rGO bring adverse effect to the Csp performance. This is because when f-MWCNT and rGO are in excess, the porous structure of FCO can be further closed up, which is supported by the Barrett-Joyner-Halenda (BJH) analysis. Used in an asymmetric supercapacitor, the composite electrode demonstrates maximum energy density of 34 Wh kg-1, maximum power density of 4479 W kg-1 and 92 % rate capability after 5000 cycles. In contrast, the pristine FCO retains only 70 % capacitance after 3000 cycles. The performance of supercapacitors in this work is comparable with other published works
Systematics, DNA barcoding and conservation of Vanilla species from Peninsular Malaysia
No full textAmong the 25 000 orchid species in Orchidaceae family, Vanilla is the most appreciated
as it is the only genus with species of high commercial agriculture value for its vanillin
production. The species from Peninsular Malaysia which represents the secondary gene pool of
the cultivated Vanilla planifolia serves as valuable resources for genetic improvement in
Vanilla. However, the potential of each species still remain in secrecy as the
genus is not comprehensively studied yet. This study was conducted to assess the native
species through systematics and molecular investigations. The data obtained will be used in their
conservation management. Therefore, efforts in locating, collecting and documenting local
Vanilla were initiated. The field samplings were conducted from 2011 to 2017 in the
states of Kedah, Perak, Pahang, Kelantan, Terengganu, Selangor, Negeri Sembilan and Johor. In
general, wild Vanilla populations in Peninsular Malaysia were difficult to locate because they were
found in many habitats. The diversity in the genus was updated with the discovery of two new
species to science, Vanilla norashikiniana R. Go et A. Raffi and Vanilla sanguineovenosa R.
Go et A. Raffi which made up the total count from this region to be represented by seven confirmed
species. Vanilla spp. most likely could tolerate the cardinal temperature of 17 to 27 oC, relative
humidity of 72 to 92% and 64 mm to 733 mm of monthly precipitation. Five important
growth events and their interactions with different environmental cues were presented with the
emphasized on the flowering stages. The fluctuations of temperature and high light intensity
were seen as the natural flowering promoters. Anthesis in Vanilla spp. were ideal to
be categorized into five important phases: floral evocation, floral bud emergence, ovary
development, size increment in bud and ovary and anthesis. Ephemeral flowering sequences of both
newly described taxa were photographed where the anthesis and senescence processes were
completed within 24 hours. Investigations at the histological level on accessions from Perak
revealed the taxonomic value of the marginal outlines from leaf transverse sections. Somatic chromosome counts (2n) among selected
accessions including two new species were found to be different in their most frequent number but
shared a common denominator of 2n= 24. Species discrimination inferred by the phylogenetic
trees generated from nuclear ribosomal internal transcribed spacer (nrITS) region had classified
the accessions into their respective genotypes with two unidentified genotypes suggesting presence
of additional species in this region. Barcoding gap was also reported in genetic
distance analysis with the speciation threshold recommended to be at 1.5%
divergence. Finally, provisional conservation action plan was proposed based on the
identified threats of which natural disasters and over collection from the wild were
noted as the major threats. Five approaches were evaluated to be pragmatic and should be
incorporated in the genus conservation action plan which were species mapping based on the
documented localities, local community involvement of Orang Asli, propagation via stem cuttings
using BAP, DNA barcodes deposition in BOLD and GenBank and also public education via MyBIS. This
project as a whole has successfully documented important findings in the botany and natural history
of the genus Vanilla from Peninsular Malaysia and these data are beneficial to the species
strategic management planning
Warna Lokal Minangkabau dalam Novel Dayon Karya Akmal Nasery Basral
No full textLocal colors have an influence on the development and introduction of the local culture of an area. The purpose of the study describes the local colors of Minangkabau in the novel Dayon by Akmal N Basral. Data collection techniques include reading techniques, note-taking techniques, and library techniques. The collected research data is analyzed through three stages including, data reduction, data presentation, and drawing conclusions. The results of the analysis show that there is a local color content in the novel Dayon by Akmal N Basral, including: a) Inyiak Tiger Beliefs, b) Minangkabau Community Customs, c) art, d) language, e) livelihood of foodstuffs, f) local animals, and g) Traditional Houses. The existence of local color content in Dayon's novel shows that the author photographed the activities of the Minangkabau people. The local content is able to become a characteristic of regional communities and is useful in shaping the character of the nation.  
REPRESENTASI PERJUANGAN MANUSIA PERBATASAN NOVEL BATAS KARYA AKMAL NASERY BASRAL REPRESENTATION OF THE BORDER HUMAN STRUGGLE NOVEL BATAS WORKS AKMAL NASERY BASRAL
No full textThis article identifies and describes how the linkage of structural elements and the study of representations contained in the novel Limit Nasery Basral Akmal works. The purpose of this research is to develop the science that studies about the arts, especially the representation of the novel in life. Representation of the human struggle in the novel boundary limits Akmal works Nasery Basral identify similarities world described in the novel by the author of the reality of life in the area perbatasa Indonesia and Malaysia. In this representation studies have found similarities that human smuggling occurs in border areas of Indonesia and Malaysia, human trafficking, and the poor condition of education in Indonesia's border with Malaysia
TUGAS DAN TANGGUNG JAWAB CONCIERGE DALAM MENANGANI BARANG BAWAAN TAMU DI HOTEL DOUBLETREE SURABAYA
No full textThe purpose of writing this Final Project is to find out the duties and responsibilities of the concierge in handling guest luggage at the DoubleTree Surabaya Hotel. The writer who is also an training at the DoubleTree by Hilton Hotel Surabaya makes observations about the duties and responsibilities of the concierge at the DoubleTree by Hilton Hotel Surabaya. The author can conclude that the duties and responsibilities of the concierge in handling guests' luggage in the Front Office department at the Double Tree Hotel Surabaya include Check in, Check out, Change Room, guest grub, storage of guest luggage
A new Vanilla species from Peninsular Malaysia
No full textA new species, Vanilla sanguineovenosa R. Go & A. Raffi, from Peninsular Malaysia is described, illustrated, and other aspects of interest discussed. It is so far known from a small population in lower montane forests at Tapah, Perak. A field key to the Peninsular Malaysian taxa, including V. sumatrana is also provided
A new Vanilla species from Peninsular Malaysia
No full textA new species, Vanilla sanguineovenosa R. Go & A. Raffi, from Peninsular Malaysia is described, illustrated, and other aspects of interest discussed. It is so far known from a small population in lower montane forests at Tapah, Perak. A field key to the Peninsular Malaysian taxa, including V. sumatrana is also provided
Music as Propaganda for Humanitarian Diplomacy: Semiotic Analysis of Ferdinand de Saussure in The Song We Are The World
No full textIn this paper, the author will examine one of the songs with the most phenomenal theme of humanity, entitled We Are The World. In the making, this song was created as a charity song initiated by the USA for Africa which aims to raise funds for the prevention of hunger in the African region, precisely in Ethiopia. This is because Ethiopia is experiencing political instability and drought from 1984-1985. In this study, the author uses Ferdinand de Saussure's semiotic analysis to see the message of meaning contained in each of the lyrics. For the research methodology, the author uses a qualitative method to review this paper. Then the author also uses the concept of humanity as the basis of the research argument, the concept of love by Mahatma Gandhi and M. Said Ramadhan Al Buthi in their interpretation of Ali Imron verse 14 and uses propaganda theory to see the role of this song implies the value of humanity. Sources of data were obtained through literature review from Scopus and Google Scholar journal documents with the NVivo 12 Plus application as a lyric analysis tool. The findings resulting from this study are that with the song, moral and humanitarian messages can be conveyed well to the public by upholding universal ethical values towards humanity. It is proven that the song We Are The World always gets more enthusiasm in the community by always being commemorated on the date of its creation, and from the recording royalties it is allocated for charity activities. It is believed by the author as a parameter for the success of the song We Are The World to get more sympathy and become a symbolic song for human things
VANILLA YERSINIANA (ORCHIDACEAE), A NEW RECORD FOR PENINSULAR MALAYSIA
No full textESA, M. I. M., NORDIN, F. A., GO, R. & RAFFI, A. 2021. Vanilla yersiniana (Orchidaceae), a new record for Peninsular Malaysia. Reinwardtia 20(2): 49 − 53. — The genus Vanilla Plum. ex Mill. from Peninsular Malaysia is now enriched with the discovery of a newly recorded species, Vanilla yersiniana that made up its regional diversity to eight taxa. This species was documented from two adjacent secondary lowland forests in Perak; further south to the southern tail of Thailand. This paper describes the first record of V. yersiniana in Peninsular Malaysia with some high-lights of its morphology and ecology. The data presented will add to the present state of knowledge on the species botanical profile
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