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Search Results: 1 - 10 of 28 matches for " DEDY DURYADI SOLIHIN "
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Comparison of DNA Extraction Methods for Microbial Community Analysis in Indonesian Tempe Employing Amplified Ribosomal Intergenic Spacer Analysis
HAYATI Journal of Biosciences , 2012,
Abstract: Tempe fermentation involved complex microbial communities which are only revealed partially through culture dependent methods. Culture-independent methods would be potential to unravel this complex microbial fermentation. Appropriate DNA extraction is an essential tool to obtain reliable data from culture independent method. In this study, we employed two commercial DNA extraction methods to find the best one for microbial community characterization employing amplified ribosomal intergenic spacer analysis (ARISA). Our result showed that PowerFood Microbial DNA Isolation Kit-MOBIO (PFMDIK) is an excellent method for microbial DNA extraction from tempe. It gave high quantity and quality of DNA suitable for PCR amplification of 16S-23S rRNA intergenic spacer to yield a diverse and reproducible ARISA profile.
Functional Group of Spiders in Cultivated Landscape Dominated by Paddy Fields in West Java, Indonesia
HAYATI Journal of Biosciences , 2009,
Abstract: Distribution of spiders in all colonized environments is limited by biotic and abiotic factors requiring adaptations with respect to, for example microhabitat choice and hunting behavior. These two factors were frequently used to group spiders into functional groups. In this study our objectives were to (i) group of genera of spiders into functional group based on their microhabitat specificity, hunting behavior, and daily activity; and (ii) compare the number and composition of functional group of spider at each habitat type and period of paddy growth. The study was conducted at a landscape dominated by paddy fields in Cianjur Watershed for a period of 9 months. Four different habitat types (paddy, vegetable, non-crop, and mixed garden), were sampled using five trapping techniques (pitfall traps, farmcop suction, sweep netting, yellow-pan traps, and sticky traps). The Unweighted Pair-Group Average and the Euclidean Distances were used to generate dendrogram of functional group of spider. We found 14 functional groups of spider at genus level. The number of functional group of spider at four habitat types was differing, but the composition was similar, because all habitats were closed to each other. Habitat structure diversity and disturbance level influenced the number of functional group of spider. Different architecture of vegetation and availability of differ prey during paddy growth, causing the composition of functional group of spider in each period of paddy growth was changed, although its number was unchanged.
Nucleus Pearl Coating Process of Freshwater Mussel Anodonta woodiana (Unionidae)
HAYATI Journal of Biosciences , 2013,
Abstract: The limiting factor which is a weakness of sea water pearl production are high costs, the risk of major business failures and a long coating time. From the issue of freshwater pearls appear to have prospects of alternative substitution for sea water pearl. This present study aimed to evaluate effect of loads (the number and diameter nucleus) on freshwater pearl coating process and the number and size of the appropriate nucleus diameter, to produce the optimum coating thickness of half-round pearls. The research consists of experimental implantation of 2, 4, and 6 nucleus number per individual mussel was maintained by the method stocked in hapa in bottom waters. Observation method and factorial randomized block design used in the study of the influence of the load to the successfulness of pearl coating and the pearl layer thickness. The results showed that A. woodiana can be utilized as a producer of freshwater pearls. In addition, the number of optimum nucleus that can be attached to the mussel A. woodiana was 2 grains/individuals with a diameter of 10 mm. Shells implanted with the optimum nucleus diameter and number of pearls produced the highest layer thickness of 17 m after 9 months cultivation. This result was good enough compared with the layer thickness of sea water pearl production after the same cultivation time.
Molecular Phylogeny of Giant Clams Based on Mitochondrial DNA Cytochrome C Oxidase I Gene
HAYATI Journal of Biosciences , 2007,
Abstract: There is an uncertainty for the relationships among giant clam species of Tridacninae, in particular among species belongs to subgenus Chametrachea i.e. Tridacna crocea, T. maxima, and T. squamosa based on different genetic markers. This study examined the relationships among three species within subgenus Chametrachea compared to the previous studies. Neighbour Joining, Maximum Parsimony and Maximum Likelihood tree were constructed based on 455 bp of the mitochondrial DNA cytochrome c oxidase I gene from T. crocea, T. squamosa, T. maxima, T. gigas, and several sequences derived from Genbank for the outgroups. The results showed that giant clams formed a monophyletic group. Within Tridacna group, T. crocea was more closely related to T. squamosa than to T. maxima and they formed a monophyletic group. T. crocea and T. squamosa were sister taxa and sister group to T. maxima and T. gigas. Close affinity between T. crocea and T. squamosa was also supported by high similarity on nucleotide level (94.30%) and concordant with the results of the previous studies using mitochondrial 16S rRNA and nuclear 18S rRNA.
Dedy Setiawan
TEFLIN Journal , 2009,
Abstract: : The perceived needs of students learning EAP were analysed u-sing a questionnaire which investigated the subjectsa€ preference for particular topics and various modes of learning in relation to both the target and present situation. The target situation in the questionnaire was represented by items concerning study skills; while items concerning the present situation were oriented to the contents of the EAP course and its methodology and activities. The findings provide evidence for determining items for inclusion in an EAP programme. They also allow us to identify items as highly, reasonably or not at all recommended for inclusion.
Solihin Solihin,Chusharini Chamid,Garlan Sugarba
Bumi Lestari , 2009,
Abstract: One of diversification usage of coal is made for carbon active. The main element in coal which is very useful for carbon active is carbon (C) as other raw materials such as bone, coffee bean, coconut shell, etc. This research used carbonized coal from PT.Bukit Asam as a media to absorb methyl mercury (CH3Hg+2) solution. The carbonized coal has iodine number of ± 386 mg/gram after it was activated at 9000C for 1 hour. It has an adsorption level of 70-80% because the SEM photograph showed a pore size of coarse fraction higher than fine fraction. The degree of saturation is influenced by the grain size of the coal carbon active where the saturation degree of coarse fraction was relatively faster than the fine fraction. Moreover, weightier and bigger debit of carbon active could adsorb higher MeHg concentration.
M. Solihin Arianto
Al-Jami'ah : Journal of Islamic Studies , 2006,
Abstract: Beberapa sarjana Muslim pada periode Islam awal telah mencurahkan perhatian yang cukup besar dalam pengklasifikasian ilmu pengetahuan dengan tujuan mengorganisasikan pengetahuan yang dapat ditransmisikan dengan cara sistemik kepada generasi berikutnya. Upaya pengklasifikasian pengetahuan ini semestinya memberikan kontribusi yang cukup signifikan dalam lingkungan perpustakaan atau pusat informasi Islam, terutamauntuk menempatkan disiplin pengetahuan tertentu atas sebuah dokumen dari seluruh organisasi pengetahuan yang ada. Di sisi lain, skema klasifikasi pengetahuan yang dihasilkan sarjana-sarjana Barat seperti DDC, LCC, dan UDC telah mendominasi lembaga-lembaga informasi di seluruh dunia termasuk negara-negara Islam.Bagaimanapun, akhirnya disadari bahwa skema-skema klasifikasi tersebut tidak memuaskan institusi-institusi informasi Islam karena mempunyai beberapa kelemahan dan perlakuan yang kurang memadai untuk mengorganisasikan dokumendokumen dalam bidang studi ke-Islaman. Berkaitan dengan hal tersebut, tulisan ini berusaha mengkaji berbagai upaya yang telah dilakukan perpustakaan-perpustakaan beberapa negara Islam seperti Arab Saudi, Iran, Pakistan, Indonesia, dan Malaysia dalam mengembangkan skema klasifikasi pengetahuan Islam. Di samping itu, berbagai problem dan tantangan ke depan yang dihadapi perpustakaan-perpustakaan tersebut sebagai akibat sistem klasifikasi Islam yang diterapkan secara berbeda antara satu negara dengan lainnya juga dibahas dalam artikel ini.
Self-Medication Practice with Nonprescription Medication among University Students: a review of the literature
Dedy Almasdy,Azmi Sharrif
Archives of Pharmacy Practice , 2011,
Abstract: Objective: To review the literature relating to self-medicationpractice with nonprescription medication among universitystudents.Methods: A narrative review of studies on self-medicationpractice with nonprescription medication among universitystudent was performed. An extensive literature search wasundertaken using indexing services available at UniversitiSains Malaysia (USM) library. The following keywords wereused for the search: self-care, self-medication, over-thecountermedicine, nonprescription medicine, minor illnesses,minor ailment, university population and communitypharmacy. Electronic databases searched were Science Direct,Medline, ISI Web of Knowledge, Inside Web, JSTOR, SpringerLink, Proquest, Ebsco Host and Google Scholar. Theseelectronic databases were searched for full text paperspublished in English.Results: Eleven studies were identified. In general, the reviewhas shown that self-medication practice with nonprescriptionmedication highly prevalence among university students. Thereasons for self-medication are vary among this populationand the main symptoms leading to self-medication areheadache or minor pain; fever, flu, cough, or cold; anddiarrhoea.The common medication is analgesic, antipyreticproducts, cough and cold remedies, anti allergy andvitamins or minerals. The sources of the medicines arepharmacy, home medicine cabinet, supermarket/shopand other person such as family, friend, neighbours andclassmates. The sources of drug information are familymember, previous experience, pharmacy salesman,doctor or nurse, advertisement and others. The reviewalso has shown that the self-medication practice couldhave many problems.Conclusions: The review provides insights about theself-medication practices among the university students.These practices were highly prevalence among universitystudents. The symptoms leading to self-medication arevary, thus the medication used and the medicationsources. It needs an adequate drug information andappropriate pharmaceutical care in self-medicationpractice appropriately among university student. Furtherstudy looking into the self-medication related problemsassociated with non-prescription products is needed.
Application of Multivariate Geostatistics to Investigate the Surface Sediment Distribution of the High-Energy and Shallow Sandy Spiekeroog Shelf at the German Bight, Southern North Sea  [PDF]
Ella Meilianda, Katrin Huhn, Dedy Alfian, Alexander Bartholomae
Open Journal of Marine Science (OJMS) , 2012, DOI: 10.4236/ojms.2012.24014
Abstract: Surface sediment data acquired by the grab sampling technique were used in the present study to produce a high-resolution and full coverage surface grain-size mapping. The objective is to test whether the hypothetically natural relationship between the surface sediment distribution and complex bathymetry could be used to improve the quality of surface sediment patches mapping. This is based on our hypothesis that grain-size characteristics of the ridge surface sediments must be intrinsically related to the hydrodynamic condition, i.e. storm-induced currents and the geometry of the seabed morphology. The median grain-size data were obtained from grab samples with inclusive bathymetric point recorded at 713 locations on the high-energy and shallow shelf of the Spiekeroog Barrier Island at the German Bight of the Southern North Sea. The area features two-parallel shoreface-connected ridges which is situated obliquely WNW-SSE oriented and mostly sandy in texture. We made use the median grain-size (d50) as the predictand and the bathymetry as the covariable to produce a high-resolution raster map of median grain-size distribution using the Cokriging interpolation. From the cross-validation of the estimated median grain-size data with the measured ones, it is clear that the gradient of the linear regression line for Cokriging is leaning closer towards the theoretical perfect-correlation line (45°) compared to that for Anisotropy Kriging. The interpolation result with Cokriging shows more realistic estimates on the unknown points of the median grain-size and gave detail to surface sediment patchiness, which spatial scale is more or less in agreement with previous studies. In addition to the moderate correlation obtained from the Pearson correlation (r = 0.44), the cross-variogram shows a more precise nature of their spatial correlation, which is physically meaningful for the interpolation process. The present study partially contributes to the framework of habitat mapping and nature protection that is to fill the gaps in physical information in a high-energetic and shallow coastal shelf.
Preparation of Activated Carbon from Maize Stems by Sulfuric Acids Activation and Their Application in Copper (II) Ion Sorption
Dedy Suhendra,Erin Ryantin Gunawan
Makara Seri Sains , 2010,
Abstract: Activated carbons were prepared from maize (Zea mays L.) stems by sulfuric acids activation or chemical methods. The dry maize stems are usually used as low-value energy resources in many countries, burned in the field, or discarded, which are unfavorable to environment. This motivates the investigation of producing value-added products from the dry maize stems, such as activated carbons, as well as solving some environmental problems. The preparation process consisted of sulfuric acid impregnation at different impregnation ratio followed by carbonization at 250-400 oC for 1-4 h. The results show that the impregnation ratio was 1.25, the optimum activation temperature was 300 oC and the activation time was 1 h. The sorption capacity of the activated carbon was 25.1 mg/g.
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