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Aktivitas Ekstrak Metanol Daun Sembung Rambat (Mikania micrantha Kunth) Terhadap Pertumbuhan Phytophthora sp. Im5 dari Batang Jeruk Siam (Citrus nobilis var. microcarpa)
Get PDFPhytophthora sp. Im5 is a pathogenic fungi that can cause brown rot gummosis on Siam citrus plant (Citrus nobilis). This research aims to determine the optimal concentration of Mikania micrantha leaf extract to effectively inhibit fungi isolates of species Phytophthora sp. Im5 from the stem of Siam citrus tree. The research was conducted from March to May 2017 at the Laboratory of Microbiology, Faculty of Mathematics and Science Tanjungpura University Pontianak. The research used poisoning food method with Completely Randomized Design consisting of 4 treatments with 3 replications. The concentration of extract used was 0; 0,55; 0,65; and 0,75 g/ml. The research showed that methanol leaf extract of M. micrantha leaf can inhibit the growth of fungi isolates of species Phytophthora sp. Im5. Methanol extract of M. micrantha with a concentration of 0,65 g/ml gave a strong inhibitory activity against the growth of fungi isolates of species Phytophthora sp. Im5 with a percentage of 63.2
Studi Analisis Perilaku Mencuci Tangan Terhadap Kepadatan Koloni Bakteri Sebelum dan Setelah Mencuci Tangan Pada Mahasiswa
Get PDFHandwashing with soap is a healthy behavior that has scientifically been proved to prevent the spread of infectious diseases. Students who are active on campus have risk factors of being contaminated by bacteria. This research aims to determine the correlation between the number of bacterial colonies on the palms and handwashing practices among students, and the difference between the number of bacterial colonies before and after washing hands with soap. This research used a pour plate method in accordance with the Standard Plate Count Method. The samples were 35 students. Based on the t-test, handwashing with soap showed a decrease in the number of bacterial colonies than before washing hands with soap, namely 1751.3 CFU / cm2 becoming 905.5 CFU / cm2 after washing hands. The logistic regression analysis and descriptive test showed that there is a correlation between the number of bacterial colonies on the palms and hand washing practices among students
Uji Antagonis Bakteri Rizosfer Potensial Proteolitik Terhadap Erwinia spp. dari Batang Tanaman Buah Naga (Hylocereus polyrhizus (Haw) Britt & Ros)
Get PDFErwinia is one of the pathogenic bacterias that causes the rot disease in the stem of dragon fruit plant. The controlling of pathogen bacteria can be done by utilizing bacteria biological. The purpose of this study is to determine the potential proteolytic rhizosphere bacteria that is able in inhibiting bacterial members of the genus Erwinia spp. which is isolated from the stem of dragon fruit plant. The winter uses double test as the method to determine the ability of bacterial antagonist. Potential proteolytic rhizosphere bacteria are found in eight isolates belonging to the genus Erwinia (BN II and BN IV). The result of antagonistic test shows that TN I rhizosfere bacterial isolate of Erwinia BN II genus with inhibit zone diameter of 12,47 mm and BN IV isolate with a diameter of 11,91mm inhibition zone
Ragam Jenis Semut (Hymenoptera: Formicidae) di Lahan Ga mbut Alami dan Perkebunan Sawit di Kecamatan Sungai Ambawang Kabupaten Kubu Raya
Get PDFAnts are one of bioindicators in peatland ecosystems. Peatlands are changing from natural conditions due to the oil palm plantations. This study aims to determine the diversity of ants in natural peatland and oil palm plantation at Sungai Ambawang District Kubu Raya. The research was located in 3 different sites, such as natural peatland, cleared peatland and the peatland that had been converted to oil palm plantation. Ants were collected by pit-fall trap, soil and leaf litter sieving, and bait trap method. There were 7 genera from 3 subfamilies (Dolichoderinae, Formicinae, and Myrmicinae) of ants found in this research. Dolichoderinae consisted of the genera Loweriella and Tapinoma, Formicinae consisted of Camponotus and Echinopla, while Myrmicinae consisted of Acanthomyrmex, Crematogaster, and Rhoptromyrmex. The Shannon diversity index (H’) of natural peatland was higher (H’ 1.12) than cleared peatland (H’ 0.00) and converted peatland (H’ 0.69). This indicates that the conversion of peatlands decreased ant species diversity
Uji Antagonis Isolat Jamur Rizosfer Lokal Terhadap Phytophthora sp. Im5 dari Pangkal Batang Tanaman Jeruk Siam (Citrus nobilis var. microcarpa)
Get PDFFungi isolate from members of species of Phytophthora sp. Im5 is one of the pathogens that cause Brown Rot Gummosis on siam citrus plant (Citrus nobilis var. microcarpa). The control of plant pathogens is biologically done by utilizing biological agents in form of rhizosphere fungi that have antagonistic activity. This research aims to determine the antagonistic activity of rhizosphere fungi ( isolate : Mucor sp. Im1, Penicillium sp. Im2, Penicillium sp. Im3, and Trichoderma sp. Im4 ) in controlling fungi isolate of species of Phytophthora sp.Im5. Isolation, identification and antagonistic test were conducted at Microbiology Laboratory, Faculty of Mathematics and Science of Tanjungpura University Pontianak from February to June 2017. This research used Completely Randomized Design with five treatments and three replications which obtained a total of 15 experimental units. The antagonistic test used double test methods. The highest antagonistic activity in suppressing the growth of fungi isolate Phytophthora sp. Im5 is fungi isolate Mucor sp. Im1 with a percentage of 45.48%
Prevalensi dan Intensitas Ektoparasit pada Insang Ikan Nila Merah (Oreochromis sp.) di Keramba Apung Sungai Kapuas Desa Kapur Kabupaten Kubu Raya
Get PDFRed tilapia (Oreochromis sp.) are cultured in floating cages of the Kapuas River in Kapur Village can be infected with ectoparasites, especially on the gills. This study aims to determine the types, prevalence and intensity of ectoparasites on the gills of red tilapia in floating cages of the Kapuas River in Kapur Village of Kubu Raya Regency. The samples were taken in April 2016 by random sampling method. The fish as many as 100 individuals were taken randomly from the floating cages in five locations. Ectoparasites were found consisting of two types which are members of the Class Monogenea, namely Dactylogyrus sp. and Gyrodactylus sp. The ectoparasite Dactylogyrus sp. mostly infected the red tilapia gills with the value of the average prevalence of 90% (infection category of almost always) and the value of the average intensity of 3.97 ind/individual. The Gyrodactylus sp. found on the gills had a value of the average prevalence of 49% (infection category of commonly) and the average intensity value of 1.76 ind/individual
Jenis-Jenis Gastropoda di Kawasan Hutan Mangrove Muara Sungai Kuala Baru Kecamatan Jawai Kabupaten Sambas
Get PDFThe Gastropodsis the most members of the phylum Mollusca and is most prevalent of aquatic and terrestrial habitats. This research aims to identify the Gastropods found in the mangrove forest area of Kuala Baru River Estuary. The research was carried out from January to March 2016. The Gastropods collected included treefauna, epifauna and infauna. The Gastropods of treefauna and epifauna were collected using the square transect method and the Gastropodsof infauna using hand sorting method. There were 12 genera of Gastropods found belonging to 9 families i.e. Ellobiidae, Potamididae, Neritidae, Ampullariidae, Pomatiopsidae, Littorinidae, Strombidae, Nassariidae and Olividae. The Ellobiidae are the mostmembers that often found in the mangrove forest area of Kuala Baru River Estuary. There were only four genera of Gastropods which were found in more than one station i.e.the Cassidula as many as 167 individuals, Pythia 21 individuals, Cerithidea 19 individuals and Terebralia 209 individuals. The Gastropods most commonly found each station is epifauna
Komposisi Mikroalga Epilitik di Sungai Mentuka Kabupaten Sekadau
Get PDFEphilitic microalgae is a microalgae that lives on a stone surface and it has an important role in aquatic ecosystem. The aim of this study are to know the composition of ephilitic microalgae and the condition of physical-chemical water in Mentuka River. This study was conducted 3 months from November 2016 to January 2017. This study used purposive random sampling method. The result shows that ephilitic microalgae which found in Mentuka River can be classify into two classes, namely Bacillariophyceae (15 genera) and Zygnematophyceae (4 genera). Synedra has the highest of average abundance in Mentuka River and the lowest is Fragilaria. Diversity and Evenness Index of ephilitic microalgae in every station categorized medium (H’= 1,53-1,65 dan E=0,52-0,56), meanwhile categorized of Dominance Index is low (C=0,29-0,34). The environmental condition in Mentuka River supports the life of ephilitic microalgae with temperature 26-28˚C, stream discharge is about 6,1-7 m/s, pH is about 6,8-7,3, dissolved oxygen is about 6,1-7 mg/L and CO2 is 3,9-5,0 mg/L
Struktur dan Profil Vegetasi Habitat Kukang Kalimantan (Nycticebus menagensis) Pelepasliaran Yayasan IAR Indonesia Di Hutan Lindung Gunung Tarak
Get PDFThe vegetation habitat of borneo slow loris in West Kalimantan has quite high potential for damage due to anthropogenic influences. The study aims to find out about the composition, structure and habitat vegetation profile of borneo slow loris at the release area of IAR Indonesia in Tarak Mountain Protection Forest. The data were collected from March to May 2016, by making plot transect. There were two transects consisting of three plots the size of 20 x 20m with four squared plots. The vegetation observed were trees, poles, saplings, seedlings and floor coverings. The data taken were the local and scientific names, number of individuals and habitus. The analysis was conducted on the density, relative density, frequency, relative frequency, dominance, relative dominance, Important Value Index (IVI), Diversity Index (H’) and dominance index (C’). The profile data taken were the position of trees, height of trees, height of first branching, DBH, crown cover, gap and stratification. The results of research showed that the vegetation composition comprised of 23 species of plants. The structure of the vegetation showed the highest IVI of tree regeneration i.e. Syzygium cuminii (117.14%) and the floor covering i.e. Piper crocatum (200%), H’ tree regeneration from 1.47 to 2.55, and floor coverings 0.00, C’ tree regeneration 0. 09 to 0.26 and floor coverings 1.00. The vegetation structure is composed of five strata, there is a vertical gap (± 1 m) and a horizontal gap (>2 m)
Struktur Anatomi Akar, Batang dan Daun Gaharu (Aquilaria malaccensis Lamk.) yang Mengalami Cekaman Kekeringan
Get PDFAgarwood (Aquilaria malaccensis) is a commodity of Non-Timber Forest Products (NTFPs), which has the result of the agar with the best quality and high value. Drought stress can impede the growth of the agarwood plant which can affect its morphology and anatomy. This research aims to determine the anatomical structure of the root, stem and leaf of the agarwood (A. malaccensis) that experiences drought stress. The research was conducted from July to October 2016. The drought stress in treatment (KL 25%) resulted in cross section of roots and stems of agarwood to have the length and thickness of cortical cells that becomes larger with a rectangular shape, in addition, the treatment (KL 25%) also resulted in the size of mesophyll tissue cells to become smaller