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The Isolation, Selection and Determination of Endophytic Bacteria from Bamboo, Gamal, Tulsi, and Alamanda
No full textEndophytic bacteria have many benefits, including increasing plant growth by producing phytohormones, increasing the production of mineral absorption, nitrogen fixation, reducing damage due to weather changes and increasing plant resistance to disease. Based on the above, it is necessary to select endophytic bacteria from various plants to be used as biocontrol agents. This study aims to obtain endophytic bacterial isolates that have the potential as biocontrol agents and plant growth supporters from bamboo shoots, Gamal, Tulsi, Lotus, and Alamanda. This research method includes sampling, endophytic bacteria isolation, hypersensitive, hemolysis, phosphate solvent, chitinolytic, proteolytic, and antagonist tests. Isolation of endophytic bacteria in 5 plants using 22 plant parts had a diversity of isolates. The isolated plant parts produced 1 to 7 isolates that had different morphology. The total isolates obtained were 59 isolates. In antagonistic observations, there was one isolate of endophytic bacteria that showed a clear zone when tested together with S. rolfsii, namely the isolate with code A24 from allamanda flower. From the data obtained, it is known that the endophytic bacterial isolates had an effect on inhibiting the growth of the pathogenic fungus S. roflsii, the endophytic bacterial isolates Consortium, A21 and the endophytic bacterial isolates A22 had no incidence of disease, while the bacterial isolates T00 (Bx) with an average disease incidence of 40% and 30% disease intensity. Meanwhile isolates A23, A24 and A25 had an average disease incidence ranging from 13.3%-26.6%, while controls had the highest disease incidence, namely 53.3% and disease intensity 66.6%
Komunitas Serangga pada Tanaman Orok-Orok (Crotalaria striata) di Berbagai Habitat
Get PDFHasmiandy Hamid, Damayanti Buchori, Sjafrida Manuwoto, dan Hermanu Triwidodo. To study insect community at orok-orok plantation (Crotalaria striata) from different habitat, we observed insects that interacted with Crotalaria plantation. There were four habitat type that used in this research, habitat open area and others were agroforestry habitat. We counted about nine ordo from insect that interacted with Crotalaria plant. More than 70% member of ordo, include to Hymenoptera, specially Formicidae. Not all function member of the ordo that known, but some of them are pollinator, parasitoid, predator and herbivore. KEY WORDS: Insect community, habitat type, Crotalaria
HAMA TANAMAN BELIMBING DI WILAYAH KABUPATEN BLITAR JAWA TIMUR
Get PDFPests of star fruit in Blitar District, East Java. Pest attack causes the production of star fruit decreases. This study aim was to identify the pests of star fruit in Blitar District which could provide an information about pest species, damage symptoms and damage intensity. The research was conducted during August – September 2014 in Gogodeso, Karangsonoand Pojok Villages at Blitar District, East Java. Observations of the pests ware done by determining the four locations of plantation on each villages randomly. Three plants sample were choosen in each plantation location diagonally. Each plant was divided into four quadrant according to wind directions. One branch in the bottom was choosen in each quadrant. Nine species were recorded as pests of starfruit in Blitar district. Pest was identified on the leaf was Pteroma plagiophleps, on the branch was Zeuzera coffeae, on the flower were Toxoptera aurantii and Maconellicoccus hirsutus, whereas those on the fruit were Toxoptera aurantii, Maconellicoccus hirsutus, Thrips javanicus, Helopeltis bradyi, Cryptophlebia leucotreta, Bactrocera dorsalis, and Bactrocera carambolae. The population density of M. hirsutus was higher in Karangsono than in other villages. The highest damage intensity was caused by Bactrocera spp., C. leucotreta and H. bradyi (occured in Gogodeso), whereas the highest damage intensity of T. javanicus occurred in Pojok.</jats:p
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
THE ABUNDANCE AND DIVERSITY OF THRIPS (THYSANOPTERA: THRIPIDAE) ON CHILI (Capsicum annuum L.) AND CAYENNE (Capsicum frutescens L.) IN BOGOR
No full textBiologi dan statistik demografi Thrips parvispinus Karny (Thysanoptera: Thripidae) pada tanaman cabai (Capsicum annuum Linnaeus)
No full textThrips parvispinus Karny (Thysanoptera: Thripidae) merupakan hama penting pada tanaman cabai di Indonesia. Hama ini dapat ditemukan pada semua bagian tanaman, khususnya bunga dan daun. Informasi mengenai biologi dan statistik demografi T. parvispinus masih terbatas. Oleh karena itu, penelitian ini bertujuan untuk mempelajari biologi dan statistik demografi serangga hama ini. Sebanyak 50 individu nimfa instar ke-1 dipelihara pada daun cabai dalam kurungan serangga yang terbuat dari gelas plastik (d = 4 cm dan t = 8 cm). Perkembangan, individu yang hidup dan mati, dan jumlah telur yang diletakkan setiap imago dicatat setiap hari. Pergantian instar ditandai dengan adanya eksuvia. Data yang terkumpul digunakan untuk mendapatkan informasi biologi, seperti perkembangan setiap instar, periode praoviposisi, siklus hidup, lama hidup imago, dan fekunditas. Data hasil pengamatan kemudian disusun dalam bentuk neraca kehidupan untuk mendapatkan data statistik demografi dengan menggunakan metode Jackknife. Hasil penelitian menunjukkan bahwa, tahap perkembangan pradewasa terdiri atas 5 fase, yaitu telur, 2 stadia nimfa, prapupa, dan pupa dengan rataan perkembangan berturut-turut selama 4,79, 1,36, 3,54, 1,08, dan 1,96 hari. Rataan masa praoviposisi, siklus hidup, lama hidup imago, dan fekunditas berturut-turut adalah 1,11 hari, 13,68 hari, 8,55 hari (betina), 6,00 hari (jantan), dan 15,33 telur. Kurva kesintasan T. parvispinus merupakan kurva tipe III dengan laju pertambahan intrinsik (r) 0,16 individu per imago betina per hari, laju reproduksi bersih (R0) 5,71 individu per induk per generasi, lama generasi (T) dan waktu berlipat ganda (DT) 11,49 hari dan 4,57 hari.</jats:p
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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