74 research outputs found
Visualisasi Penjualan Dan Lokasi Penjualan Menggunakan Google Map Serta Proyeksi Permintaan Flexy Dan Modem Di Masa Mendatang (Studi Kasus: PT. Telkom Indonesia)
Banyak lokasi penjualan produk Telkom yang tidak dapat teratasi karena banyaknya permintaan tapi kurangnya sales yang melayani konsumen. Aplikasi berbasis web akan dibuatkan dengan meggunakan peta google yang terintegrasi menggunakan basis data yang disesuaikan dengan Perusahaan. Metode yang digunakan dalam menyelesaikan penelitian ini yaitu dengan melakukan visualisasi sales dan letak lokasi penjualan di setiap STO (Sentral Telepon Otomatis) menggunakan Google Map serta melakukan proyeksi permintaan produk guna mengetahui besarnya pangsa pasar di setiap STO. Sebelum memasuki halaman untuk memasukkan data, dibuatkan login admin dan form pengisian data yang diperlukan untuk memudahkan pengisian data tanpa harus mengubah ke dalam basis data Oracle secara langsung. Tujuan dari penelitian ini adalah menunjukkan lokasi STO serta Plaza yang dimiliki oleh Telkom dengan cara memunculkan grafik pada gambar peta di Google Map dan melakukan perhitungan proyeksi permintaan produk Telkom di masa mendatang dengan menggunakan metode simple exponential smoothing. Hasil akhir dalam penelitian ini adalah aplikasi yang sudah terintegrasi dengan baik serta memberikan rekomendasi untuk meningkatkan penjualan yang rendah untuk di wilayah-wilayah tertentu
Inhibition of ovine in vitro fertilization by anti-Prt antibody: hypothetical model for Prt/ZP interaction
BACKGROUND: The impact of prion proteins in the rules that dictate biological reproduction is still poorly understood. Likewise, the role of prnt gene, encoding the prion-like protein testis specific (Prt), in ram reproductive physiology remains largely unknown. In this study, we assessed the effect of Prt in ovine fertilization by using an anti-Prt antibody (APPA) in fertilization medium incubated with spermatozoa and oocytes. Moreover, a computational model was constructed to infer how the results obtained could be related to a hypothetical role for Prt in sperm-zona pellucida (ZP) binding. METHODS: Mature ovine oocytes were transferred to fertilization medium alone (control) or supplemented with APPA, or pre-immune serum (CSerum). Oocytes were inseminated with ovine spermatozoa and after 18 h, presumptive zygotes (n = 142) were fixed to evaluate fertilization rates or transferred (n = 374) for embryo culture until D6-7. Predicted ovine Prt tertiary structure was compared with data obtained by circular dichroism spectroscopy (CD) and a protein-protein computational docking model was estimated for a hypothetical Prt/ZP interaction. RESULTS: The fertilizing rate was lower (P = 0.006) in APPA group (46.0+/−6.79%) when compared to control (78.5+/−7.47%) and CSerum (64.5+/−6.65%) groups. In addition, the cleavage rate was higher (P < 0.0001) in control (44.1+/−4.15%) than in APPA group (19.7+/−4.22%). Prt CD spectroscopy showed a 22% alpha-helical structure in 30% (m/v) aqueous trifluoroethanol (TFE) and 17% alpha in 0.6% (m/v) TFE. The predominant alpha-helical secondary structure detected correlates with the predicted three dimensional structure for ovine Prt, which was subsequently used to test Prt/ZP docking. Computational analyses predicted a favorable Prt-binding activity towards ZP domains. CONCLUSIONS: Our data indicates that the presence of APPA reduces the number of fertilized oocytes and of cleaved embryos. Moreover, the CD analysis data reinforces the predicted ovine Prt trend towards an alpha-helical structure. Predicted protein-protein docking suggests a possible interaction between Prt and ZP, thus supporting an important role for Prt in ovine fertilization
Is prnt a pseudogene? identification of ram prt in testis and ejaculated spermatozoa
A hallmark of prion diseases or transmissible spongiform encephalopaties is the conversion of the cellular prion protein (PrPC), expressed by the prion gene (prnp), into an abnormally folded isoform (PrPSc) with amyloid-like features that causes scrapie in sheep among other diseases. prnp together with prnd (which encodes a prion-like protein designated as Doppel), and prnt (that encodes the prion protein testis specific - Prt) with sprn (shadow of prion protein gene, that encodes Shadoo or Sho) genes, constitute the "prion gene complex". Whereas a role for prnd in the proper functioning of male reproductive system has been confirmed, the function of prnt, a recently discovered prion family gene, comprises a conundrum leading to the assumption that ruminant prnt is a pseudogene with no protein expression. The main objective of the present study was to identify Prt localization in the ram reproductive system and simultaneously to elucidate if ovine prnt gene is transcribed into protein-coding RNA. Moreover, as Prt is a prnp-related protein, the amyloid propensity was also tested for ovine and caprine Prt. Recombinant Prt was used to immunize BALB/c mice, and the anti-Prt polyclonal antibody (APPA) immune response was evaluated by ELISA and Western Blot. When tested by indirect immunofluorescence, APPA showed high avidity to the ram sperm head apical ridge subdomain, before and after induced capacitation, but did not show the same behavior against goat spermatozoa, suggesting high antibody specificity against ovine-Prt. Prt was also found in the testis when assayed by immunohistochemistry during ram spermatogenesis, where spermatogonia, spermatocytes, spermatids and spermatozoa, stained positive. These observations strongly suggest ovine prnt to be a translated protein-coding gene, pointing to a role for Prt protein in the ram reproductive physiology. Besides, caprine Prt appears to exhibit a higher amyloid propensity than ovine Prt, mostly associated with its phenylalanine residue.publishersversionpublishe
Relazioni della Campagna Glaciologica 2011
Relazioni annuali della Campagna Glaciologica del Comitato Glaciologico Italian
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