Filariasis is a problematic tropical vector borne infection. Here, the author proposes an idea on a physical change, serum Specific gravity, in serum of filariasis cases and further extrapolates for its clinical usefulness. According to this study, the finalized estimated serum Specificity in filariasis is more than that of normal condition. The change of the Specific gravity due to additional content or mass can be demonstrated and might be useful for diagnosis and following up of filariasis.

One of the factors which affects the gas lift performance is Specific gravity of a lift gas (or the Molecular weight), which can influence the gas solubility in oil and has a direct effect on the gas lift performance. There are some previous researches which have included the lift gas Specific gravity in their modeling, but in none of them, a comprehensive research about the effect of lift gas Specific gravity in gas allocation optimization, gas lift stability, economic factors, and some other aspects of gas lift is done. This research, concentrating on lift gas Specific gravity, introduces an easy and inexpensive method for increasing the oil production in gas lifted wells. In addition, the effect of injection gas Specific gravity in some phenomena such as the stability of the flow in a single well and in a gas allocation optimization has been studied, and an easy way to escape the unstable flow introduced. Moreover, the result shows that changing the gas composition causes three different behaviors based on the range of changes. In a group of wells, changing the Specific gravity of gas causes a different injection pattern, but its effect on total production is not huge. Finally, similar to the case of single wells, changing the Specific gravity of a group of wells has changed the production in three regions and has its Specific sensitivity to the change of the injection gas Specific gravity in each region.

Two experiments were conducted to evaluate the relationships between nutrients degradability, kinetics of hydration, functional Specific gravity (FSG) of the three types of beet pulp (BP) including fine (FBP), nor-mal (NBP) and pelleted (PBP) BP. In experiment 1, about 3 g of samples was weighed in sealed nylon bags (6 cm´7.5 cm, 40±5 mm pore size), incubated in rumen of two cannulated Holstein steers at 0, 3, 6, 12, 18, 24, 36 and 48 h. The dry matter (DM) degradation was different among the treatments for soluble, slowly and potentially degradable fractions, rate of degradation, and effective degradability. In experiment 2, after ruminal incubation of two bags at 0, 0.5, 1, 1.5, 3, 6, 12, 18, 24, 36 and 48 h, the bags were removed with-out and with washing, the kinetic of hydration, functional Specific gravity (FSG) measured with pycnome-ter. Hydration rate and water holding capacity (WHC) were different. Grinding and pelleting decreased hydration rate and WHC of BP, but increased initial and final FSG over incubation time. Soluble, slowly degradable, and indigestible fraction of DM explained 82.4, 94.8, 2.7, 54.2, 87.3 and 79.7%; 34.1, 50.0, 2.2, 31.4, 62.2 and 63.4%; and 89.1, 12.2, 68.0, 84.7 and 92.9% of the total variation of the fractional rate of degradation, effective degradability, hydration rate, WHC, initial and final FSG, respectively. In addition, the correlations between digestion and hydration parameters were high. As BP has lower than critical size, can easily pass from the reticulorumen orifice, therefore, its FSG is more important to control ruminal re-tention time and degradation.

Barite is an important additive material to increase the weight of excavation mud. It has been used extensively in the excavation mud industry. The barite particle sizes used in excavation mud is very important. There is a direct relationship between the amount on the sift of 200 and 325 mesh. By reducing particle sizes of the 200 and 325 mesh, the Specific gravity of the barite power increased slightly. It could be concluded that increasing the size of the barite powder particle can reduce density, but this should be considered as a laboratorial error. Thus, granulation has a great influence on the viscosity of barite powder. According to previous studies dimensions below 325 mesh are very influential on viscosity. It can be said excavating companies consume more barite powder when the Specific gravity of excavation mud is diminished because barite powder can enhance Specific gravity but the viscosity goes up. There will be more problems in the excavation mud if viscosity increases.

This experiment was carried out to evaluate the effect of Specific gravity (SG) and particle size (PS) of Chromium-mordanated alfalfa neutral detergent fiber (NDF) markers on estimation of particulate rumen turnover. Thirty-two multiparous, mid lactation Holstein dairy cows (body weight=654±24 kg) were allot-ted to a completely randomized design experiment with two replications in a 4×4 factorial method. The experiment was accomplished over 21 d (adaptation, 14 d; sample collection, 7 d). Cows were ad libitum fed twice daily at 09: 00 and 21: 00 with similar total mixed rations. To prepare the marker, alfalfa in the individual bales was chopped for theoretical cut length 19, 10 and 5 mm. The fine alfalfa was prepared by grinding the 5 mm cut alfalfa through a 2 mm screen. The marker preparation followed a modified proce-dure of Uden et al. (1980) by different PS (8.45, 4.38, 3.00 and 1.10 mm) and K2Cr2O7 concentration in mordanting solution (50, 300, 500 and 900 g/kg K2Cr2O7 instead of 300 g/kg). Fecal grab samples were taken at 0, 6, 12, 16, 20, 24, 30, 36, 48, 60, 72, 96, 120 and 144 h after dosing. Reduction of PS and en-hancement of K2Cr2O7 concentration increased SG of marker, ruminal passage rate, but decreased ruminal mean retention time, time delay and total mean retention time. The coefficient of correlation between SG and PS of marker, ruminal passage rate, time delay and ruminal mean retention time were -0.62, -0.70 and 0.65; 0.45, 0.75 and 0.12, respectively. The SG of themarker was the most influential factor affecting ru-minal passage rate and mean retention time.