Pengaruh Penambahan Tepung Rimpang Temu Kunci (Boesenbergia Pandurata Roxb) Dalam Ransum Terhadap Ketahanan Tubuh Ayam Broiler (the Effect of Powder Addition Fingerroot Rhizome (Boesenbergia Pandurata Roxb) in the Diet on Broiler Body Resistance)

The aimed of the research was determined the effect of powder addition fingerroot rhizome in the diet on broiler body resistance with observed leukocyte total, heterophile lymphocyte ratio and bursa fabricius weight. The material used were 120 broiler (unsex) age of 1 week with body weight 321.78 ± 7.8 g. The research diet based on 3,133.83-3,229.79 kcal/kg metabolic energy and 21.00-21.33% crude protein with ingredients yellow corn, fine bran, soybean meal, fish meal, pollard, poultry meat meal (PMM), bran, premix, vegetable oil and powder of fingerroot rhizome. The research used completely randomize design (CRD) with 5 treatments and 4 replicates, consisted of 6 broilers per experimental. The treatment given was T0 (basal diet), T1 (basal diet + 0.8% fingerroot powder), T2 (basal diet + 1.2% fingerroot powder), T3 (basal diet + 1.6% fingerroot powder) and T4 (basal diet + 2.0% fingerroot powder). Parameters measured were leukocyte total, heterophile lymphocyte ratio and bursa fabricius weight. The data were analyzed according to analysis of variance. The result shown that the treatment had no significant effect (P>0.05) to total of leukocyte, heterophile lymphocyte ratio and bursa fabricius weight. Based on the results of the research concluded that the addition of fingerroot rhizome powder until 2% in broiler diet during 5 week of treatment didn\u27t changed body resistance of broiler

Pengukuran Efektivitas Tanaman Bayam (Amaranthus SP.) Dalam Penyerapan Logam Timbal (Pb) Pada Lahan Tpa Supit Urang, Malang

Penelitian telah dilakukan untuk mengukur efektivitas tanaman bayam (Amaranthus sp.) dalam menyerap logam timbal (Pb) pada lahan TPA Supit Urang, Malang. Penelitian dilakukan terhadap tanaman bayam yang ditumbuhkan dalam media tanah yang terkontaminasi logam berat Pb dengan konsentrasi awal 3,33 ppm. Pengamatan dilakukan dalam waktu 7, 11, 15, 19, 23 dan 27 hari setelah masa penanaman. Sampel tanaman dipisahkan antara bagian akar, batang dan daun. Dari hasil penelitian diperoleh bahwa konsentrasi Pb dalam tanah berkurang dan pada tanaman meningkat. Selama 27 hari, konsentrasi Pb dalam tanah yang ditanami bayam berkurang hingga 0,91 ppm. Pada awal pengamatan, konsentrasi Pb pada akar, batang dan daun tanaman bayam berturut-turut sebesar 1 ppm, 0,91 ppm dan 0,75 ppm. Pada akhir pengamatan, konsentrasi Pb pada akar, batang dan daun tanaman bayam berturut-turut sebesar 1,31 ppm, 1,15 ppm dan 1,09 ppm

Isolasi dan Karakterisasi Ralstonia Syzygii

Ralstonia syzygii is one of important pathogens of cloves. This study was aimed at obtaining pure culture of R. syzygi from diseased plant tissue samples. The acterium was isolated from infected clove plantations in Ungaran, Central Java. It had the ability to make clove seedlings show symptoms and then die 41 days after inoculation. The reisolated bacterium also showed its ability to kill clove seedlings after 17 days. The bacterium is gram negative, able to ultilize glucose, sucrose, maltose, mannitol, sorbitol, dulcitol, and glycerol, able to hydrolyze starch, grow well at 27oC, able to catalyze and release water and oxygen from hydrogen peroxyde (H2O2) and aerobically. Ralstonia syzygii merupakan salah satu patogen penting pada tanaman cengkeh. Penelitian ini dilakukan untuk mendapakan isolat murni R syzygii dari jaringan tanaman terinfeksi. Bakteri diisolasi dari pertanaman cengkeh sakit yang berasal dari daerah Ungaran, Jawa Tengah. Bakteri menunjukkan kemampuan untuk menyebabkan bibit tanaman cangkeh sakit dan kemudian mati 41 hsi. Bakteri hasil reisolasi juga menunjukkan kemampuannya menyebabkan sakit dan kematian pada bibit tanaman cengkeh setelah 17 hsi. Bakteri yang diperoleh bersifat gram negatif, mampu memanfaatkan glukosa, sukrosa, maltosa, manitol, sorbitol, dulsitol, dan gliserol, mampu menghidrolisis pati, tumbuh baik pada suhu 27o C, mampu mengkatalisis dan melepaskan air dan oksigen dari hydrogen peroxide (H2O2) dan bersifat aerob

Spatially Selective Assembly of Quantum Dot Light Emitters in an LED Using Engineered Peptides

Cataloged from PDF version of article.Semiconductor nanocrystal quantum dots are utilized in numerous applications in nano- and biotechnology. In device applications, where several different material components are involved, quantum dots typically need to be assembled at explicit locations for enhanced functionality. Conventional approaches cannot meet these requirements where assembly of nanocrystals is usually material-nonspecific, thereby limiting the control of their spatial distribution. Here we demonstrate directed self-assembly of quantum dot emitters at material-specific locations in a color-conversion LED containing several material components including a metal, a dielectric, and a semiconductor. We achieve a spatially selective immobilization of quantum dot emitters by using the unique material selectivity characteristics provided by the engineered solid-binding peptides as smart linkers. Peptide-decorated quantum dots exhibited several orders of magnitude higher photoluminescence compared to the control groups, thus, potentially opening up novel ways to advance these photonic platforms in applications ranging from chemical to biodetection. © 2011 American Chemical Society

In search of progenitors for supernova-less GRBs 060505 and 060614: re-examination of their afterglows

GRB060505 and GRB060614 are nearby long-duration gamma-ray bursts (LGRBs) without accompanying supernovae (SNe) down to very strict limits. They thereby challenge the conventional LGRB-SN connection and naturally give rise to the question: are there other peculiar features in their afterglows which would help shed light on their progenitors? To answer this question, we combine new observational data with published data and investigate the multi-band temporal and spectral properties of the two afterglows. We find that both afterglows can be well interpreted within the framework of the jetted standard external shock wave model, and that the afterglow parameters for both bursts fall well within the range observed for other LGRBs. Hence, from the properties of the afterglows there is nothing to suggest that these bursts should have another progenitor than other LGRBs. Recently, Swift-discovered GRB080503 also has the spike + tail structure during its prompt gamma-ray emission seemingly similar to GRB060614. We analyse the prompt emission of this burst and find that this GRB is actually a hard-spike + hard-tail burst with a spectral lag of 0.8$\pm$0.4 s during its tail emission. Thus, the properties of the prompt emission of GRB060614 and GRB080503 are clearly different, motivating further thinking of GRB classification. Finally we note that, whereas the progenitor of the two SN-less bursts remains uncertain, the core-collapse origin for the SN-less bursts would be quite certain if a wind-like environment can be observationally established, e.g, from an optical decay faster than the X-ray decay in the afterglow's slow cooling phase.Comment: 15 pages, 7 figures, 4 tables, ApJ in press; added Fig. 7 of the lag-luminosity relatio

The Anomalous Early Afterglow of GRB 050801

The ROTSE-IIIc telescope at the H.E.S.S. site, Namibia, obtained the earliest detection of optical emission from a Gamma-Ray Burst (GRB), beginning only 21.8 s from the onset of Swift GRB 050801. The optical lightcurve does not fade or brighten significantly over the first ~250 s, after which there is an achromatic break and the lightcurve declines in typical power-law fashion. The Swift/XRT also obtained early observations starting at 69 s after the burst onset. The X-ray lightcurve shows the same features as the optical lightcurve. These correlated variations in the early optical and X-ray emission imply a common origin in space and time. This behavior is difficult to reconcile with the standard models of early afterglow emission.Comment: 5 pages, 1 figure. Accepted for publication in ApJ Letter

The shallow-decay phase in both optical and x-ray afterglows of Swift GRB 090529A: Energy injection into a wind-type medium?

The energy injection model is usually proposed to interpret the shallow-decay phase in Swift GRB X-ray afterglows. However, very few GRBs have simultaneous signatures of energy injection in their optical and X-ray afterglows. Here, we report optical observations of GRB 090529A from 2000 sec to $\sim10^6$ sec after the burst, in which an achromatic decay is seen at both wavelengths. The optical light curve shows a decay from 0.37 to 0.99 with a break at $\sim10^5$ sec. In the same time interval, the decay indices of the X-ray light curve changed from 0.04 to 1.2. Comparing these values with the closure relations, the segment after 3$\times10^{4}$ sec is consistent with the prediction of the forward shock in an ISM medium without any energy injection. The shallow-decay phase between 2000 to 3$\times10^{4}$ sec could be due to the external shock in a wind-type-like medium with an energy injection under the condition of $\nu_o < \nu_c < \nu_x$. However, the constraint of the spectral region is not well consistent with the multi-band observations. For this shallow-decay phase, other models are also possible, such as energy injection with evolving microphysical parameters, or a jet viewed off-axis,etc.Comment: 19pages,2gigures, accepted by MNRA

Variable polarization in the optical afterglow of GRB 021004

We present polarimetric observations of the afterglow of gamma-ray burst (GRB) 021004, obtained with the Nordic Optical Telescope (NOT) and the Very Large Telescope (VLT) between 8 and 17 hours after the burst. Comparison among the observations shows a 45 degree change in the position angle from 9 hours after the burst to 16 hours after the burst, and comparison with published data from later epochs even shows a 90 degree change between 9 and 89 hours after the burst. The degree of linear polarization shows a marginal change, but is also consistent with being constant in time. In the context of currently available models for changes in the polarization of GRBs, a homogeneous jet with an early break time of t_b ~ 1 day provides a good explanation of our data. The break time is a factor 2 to 6 earlier than has been found from the analysis of the optical light curve. The change in the position angle of the polarization rules out a structured jet model for the GRB.Comment: 5 pages, 2 figures. Published in A&A letter

Short Gamma Ray Bursts: marking the birth of black holes from coalescing compact binaries

This contribution summarizes, as of early 2008, the observational and theoretical understanding of the origin, physics, and emission properties of short gamma-ray bursts in both electromagnetic and gravitational waves.Comment: 19 pages, appeared in the book "Physics of Relativistic Objects in Compact Binaries: From Birth to Coalescence", Astrophysics and Space Science Library, edited by M. Colpi, P. Casella, V. Gorini, U. Moschella, and A. Possent