In Vitro Fertility of Post-thawed Epididymal Ram Spermatozoa After Storage at 5 °C Before Cryopreservation

This study addressed the effects of storage duration of epididymides at 5 °C before sperm collection and their fertility after cryopreservation in vitro. Spermatozoa from one of the testes pairs were immediately collected, evaluated and frozen (control group). The remaining epididymides were cooled to 5 °C and stored for 24, 48, 72, and 96 h (experimental groups), after which spermatozoa were collected and frozen as in the control group. Before and after thawing, sperm motility, sperm viability and plasma membrane integrity were assessed. The fertilizing ability of frozen-thawed spermatozoa of each group was evaluated by in vitro fertilization of matured sheep oocytes. Sperm quality (sperm motility, viability, and plasma membrane integrity) at collection and after cryopreservation decreased as the duration of the epididymal storage interval increase (P < 0.05). The motility decreased steadily along the studied time periods. Although, the fertilizing ability of post-thawed epididymal spermatozoa gradually decreased as the storage period was prolonged, the spermatozoa collected from the cauda epididymides stored at 5 °C for up to 96 h were able to fertilize 16%-65% of oocytes in vitro. Results of the present study showed that ram epididymal spermatozoa survive in storage at 5 °C for up to 96 h. These spermatozoa maintain their fertilizing ability and may be suitable for use in IVF and other assisted reproductive procedures

Understanding Creative Behavior Among Indonesian Radio Station Managers: a Conceptual Framework

The main purpose of the article is to increase understanding in some personal characteristics affecting creative performance among Indonesian radio station managers' leadership context. Organizational researchers and managers alike have long held the view that individual creativity is critical for organizational success. The first element of improvement creativity, that is, the ‘person', is obvious. New ideas are not generated or implemented by organizations or technology, but come into being through efforts of dedicated people. Thus, it is important to understand people's personality, motivations, skills, level of experiences, and psychological preferences. A number of propositions for future research in relational of individual creativity model are also suggested

Studi Absorpsi Co2 Menggunakan Kolom Gelembung Berpancaran Jet (Jet Bubble Column)

A Study of CO2 Absorption Using Jet Bubble Column. The phenomenon of plunging jet gas-liquid contact occurs quite often in nature, it's momentum carries small air bubbles with it into the reactor medium. The momentum of the liquid stream can be sufficient to carry small bubbles completely to the bottom of the vessel. A stream of liquid falling toward a level surface of that liquid will pull the surrounding air along with it. It will indent the surface of the liquid to form a trumpet-like shape. If the velocity of the stream is high enough, air bubbles will be pulled down, i.e. entrained into the liquid. This happens for two main reasons: air that is trapped between the edge of the falling stream and the trumpet-shaped surface profile and is carried below the surface. This study investigates the potential of a vertical liquid plunging jet for a pollutant contained gas absorption technique. The absorber consists of liquid jet and gas bubble dispersed phase. The effects of operating variables such as liquid flowrate, nozzle diameter, separator pressure, etc. on gas entrainment and holdup were investigated. The mass transfer of the system is governed by the hydrodynamics of the system. Therefore a clear and precise understanding of the above is necessary : to characterize liquid and gas flow within the system, 2. Variation in velocity of the jet with the use of different nozzle diameters and flow rates, 3. Relationship between the liquid and entrained airflow rate, 4. Gas entrainment rate and gas void fraction

Sistem Pakar Berbasis Web dengan Menggunakan Metode Forward Chaining untuk Mendiagnosa Kerusakan Mobil Daihatsu Ayla

Pembahasan pada penelitian ini mengenai pembuatan situs web yang dimanfaatkan sebagai salah satu sarana referensi bagi pengguna kendaraan dalam memperbaiki kendaraannya. Contoh kasus yang akan dibawakan penulis adalah sistem pakar dalam untuk mendeteksi kerusakan mobil Daihatsu Ayla. Penulis membuat web sederhana yang menampilkan jenis jenis kerusakan yang ada pada mobil Daihatsu Ayla dan bagaimana cara untuk memperbaiki kerusakan tersebut. Sehingga diharapkan lewat web ini menjadi pertolongan pertama bagi pengendara mobil dalam memperbaiki kendaraannya ketika keadaan darurat atau menjadi pendamping ketika pengendara mencoba memperbaiki kendaraannya sendiri di rumah