601 research outputs found
Dissolved Oxygen Concentration From the Water Around the Floating Cage Fish Culture Area and From the Area with No Cage, in the DAM Site of the Koto Panjang Reservoir
In floating cage fish culture activities, degradation of feed remain and fish feces willincrease the Dissolved Oxygen content in the surrounding area. A research aims to understandthe Dissolved Oxygen concentration in the water from the cage area and from the area that hasno cage has been done from July - November 2014. In the Koto Panjang Dam, the floating cagefish culture is in the DAM site. Samplings were conducted 4 times, once/ 2 weeks. In There were3 stations, namely 200 m upstream nof the cage area (S1), in the cage area (S2) and 200 mdownstream of the cage area (S3). each station, water samples were collected from 3 differentdepth, surface; 2 secchi and 4 secchi depths. Parameters measured were dissolved oxygenconcentration, phytoplankton, free carbon dioxide, nitrate, phosphate, temperature, pH,transparancy, and depth. Result shown the concentration of Dissolved Oxygen in the S1 was 4,52mg/L – 7,17 mg/L; in the S2 was 3,28 mg/L – 6,57 mg/L; and in the S3 4,00 mg/L – 6,87 mg/L.The highest concentration of the Dissolved Oxygen was in the upstream (S1) while the lowestwas in S2. Other water quality parameter measured were phytoplankton: 500 cells/L – 8,226cells/L; free carbon dioxide: 4,49 mg/L - 11,48 mg/L; temperature: 30,6oC – 31oC; pH: 5;transparancy 1,98 m – 2,55 m; depth: 27 m – 40 m. General the parts quality still support theaquatic organism life. the values of water quality parameters indicate that the water quality in theDAM site of the Koto Panjang is good and might be able to support the life of aquatic organismsin that area
Perancangan Media Promosi Video Profil Mandana Mas dengan Teknik Live Shoot sebagai Upaya Meningkatkan Brand Awareness
Mandana Mas is a company engaged in the fashion world that produce accessories made from beads. The purpose of designing this profile video media campaign is an effort to increase brand awareness of a Perusaahan. Further research conducted with qualitative research methods that will conduct interviews, observation, documentation, and literacy in order to obtain the data used to support the design of Mandana Mas's profile video. Keyword of designing video Mandana profile Mas've been through data analysis that has been done. Determining keywords is taken based on the data collected from interviews, observations, STP, literature studies, existing studies, and studies of competitors resulting in "Dynamic" as a keyword designing this profile video. The concept of "Dynamic" aims to demonstrate a business step of Mandana Mas who has integrity and innovative personality. So media video promotions and media profile supporter in the form of websites and product catalogs designed to give a picture of Mandana Mas information about working with integrity
Energy and Charged Particle Flow in 10.8 A GeV/c Au+Au Collisions
Experimental results and a detailed analysis are presented of the transverse
energy and charged particle azimuthal distributions measured by the E877
collaboration for different centralities of Au+Au collisions at a beam momentum
of 10.8 A GeV/c. The anisotropy of these distributions is studied with respect
to the reaction plane reconstructed on an event-by-event basis using the
transverse energy distribution measured by calorimeters. Results are corrected
for the reaction plane resolution. For semicentral events we observe directed
flow signals of up to ten percent. We observe a stronger anisotropy for slow
charged particles. For both the charged particle and transverse energy
distributions we observe a small but non zero elliptic anisotropy with the
major axis pointing into the reaction plane. Combining the information on
transverse energy and charged particle flow we obtain information on the flow
of nucleons and pions. The data are compared to event generators and the need
to introduce a mean field or nucleon-nucleon potential is discussed.Comment: RevTex, 25 pages, 13 figures included as one Postscript file,
submitted to Phys. Rev.
Testing potential new sites for optical telescopes in Australia
In coming years, Australia may find the need to build new optical telescopes to continue local programmes, contribute to global survey projects, and form a local multi-wavelength connection for the new radio telescopes being built. In this study, we refine possible locations for a new optical telescope by studying remotely sensed meteorological infrared data to ascertain expected cloud coverage rates across Australia, and combine these data with a digital elevation model using a geographic information system. We find that the best sites within Australia for building optical telescopes are likely to be on the highest mountains in the Hamersley Range in northwest Western Australia, while the MacDonnell Ranges in the Northern Territory may also be appropriate. We believe that similar seeing values to Siding Spring should be obtainable and with significantly more observing time at the identified sites. We expect to find twice as many clear nights as at current telescope sites. These sites are thus prime locations for future on-site testing
The p97-UBXD8 complex regulates ER-Mitochondria contact sites by altering membrane lipid saturation and composition
The intimate association between the endoplasmic reticulum (ER) and mitochondrial membranes at ER-Mitochondria contact sites (ERMCS) is a platform for critical cellular processes, particularly lipid synthesis. How contacts are remodeled and the impact of altered contacts on lipid metabolism remains poorly understood. We show that the p97 AAA-ATPase and its adaptor ubiquitin-X domain adaptor 8 (UBXD8) regulate ERMCS. The p97-UBXD8 complex localizes to contacts and its loss increases contacts in a manner that is dependent on p97 catalytic activity. Quantitative proteomics and lipidomics of ERMCS demonstrates alterations in proteins regulating lipid metabolism and a significant change in membrane lipid saturation upon UBXD8 deletion. Loss of p97-UBXD8 increased membrane lipid saturation via SREBP1 and the lipid desaturase SCD1. Aberrant contacts can be rescued by unsaturated fatty acids or overexpression of SCD1. We find that the SREBP1-SCD1 pathway is negatively impacted in the brains of mice with p97 mutations that cause neurodegeneration. We propose that contacts are exquisitely sensitive to alterations to membrane lipid composition and saturation
Active Tension Network model suggests an exotic mechanical state realized in epithelial tissues.
Mechanical interactions play a crucial role in epithelial morphogenesis, yet understanding the complex mechanisms through which stress and deformation affect cell behavior remains an open problem. Here we formulate and analyze the Active Tension Network (ATN) model, which assumes that the mechanical balance of cells within a tissue is dominated by cortical tension and introduces tension-dependent active remodeling of the cortex. We find that ATNs exhibit unusual mechanical properties. Specifically, an ATN behaves as a fluid at short times, but at long times supports external tension like a solid. Furthermore, an ATN has an extensively degenerate equilibrium mechanical state associated with a discrete conformal - "isogonal" - deformation of cells. The ATN model predicts a constraint on equilibrium cell geometries, which we demonstrate to approximately hold in certain epithelial tissues. We further show that isogonal modes are observed in the fruit y embryo, accounting for the striking variability of apical areas of ventral cells and helping understand the early phase of gastrulation. Living matter realizes new and exotic mechanical states, the study of which helps to understand biological phenomena
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Non-thermal plasma modulates cellular markers associated with immunogenicity in a model of latent HIV-1 infection
Effective control of infection by human immunodeficiency virus type 1 (HIV-1), the causative agent of the acquired immunodeficiency syndrome (AIDS), requires continuous and life-long use of anti-retroviral therapy (ART) by people living with HIV-1 (PLWH). In the absence of ART, HIV-1 reemergence from latently infected cells is ineffectively suppressed due to suboptimal innate and cytotoxic T lymphocyte responses. However, ART-free control of HIV-1 infection may be possible if the inherent immunological deficiencies can be reversed or restored. Herein we present a novel approach for modulating the immune response to HIV-1 that involves the use of non-thermal plasma (NTP), which is an ionized gas containing various reactive oxygen and nitrogen species (RONS). J-Lat cells were used as a model of latent HIV-1 infection to assess the effects of NTP application on viral latency and the expression of pro-phagocytic and pro-chemotactic damage-associated molecular patterns (DAMPs). Exposure of J-Lat cells to NTP resulted in stimulation of HIV-1 gene expression, indicating a role in latency reversal, a necessary first step in inducing adaptive immune responses to viral antigens. This was accompanied by the release of pro-inflammatory cytokines and chemokines including interleukin-1β (IL-1β) and interferon-γ (IFN-γ); the display of pro-phagocytic markers calreticulin (CRT), heat shock proteins (HSP) 70 and 90; and a correlated increase in macrophage phagocytosis of NTP-exposed J-Lat cells. In addition, modulation of surface molecules that promote or inhibit antigen presentation was also observed, along with an altered array of displayed peptides on MHC I, further suggesting methods by which NTP may modify recognition and targeting of cells in latent HIV-1 infection. These studies represent early progress toward an effective NTP-based ex vivo immunotherapy to resolve the dysfunctions of the immune system that enable HIV-1 persistence in PLWH
Proton and Pion Production in Au+Au Collisions at 10.8A GeV/c
We present proton and pion tranverse momentum spectra and rapidity
distributions for Au+Au collisions at 10.8A GeV/c. The proton spectra exhibit
collective transverse flow effects. Evidence of the influence of the Coulomb
interaction from the fireball is found in the pion transverse momentum spectra.
The data are compared with the predictions of the RQMD event generator.Comment: plain tex (revtex), 24 pages Submitted to Phys. Rev.
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