h. mohammadzadeh

Sulfate is one of the important groundwater pollutant sources in many parts of the world and it can enter into groundwater from various sources, such as lithology (dissolution of evaporative and pyrite oxidation), atmosphere (sea water spray), industrial (combustion of fossil fuels, sulfide- minerals production, and agricultural fertilizers), and etc. Identifying sources of soluble sulfate in water sources is important.  The sulfate in groundwater can be investigated using isotope and geochemistry techniques. Using isotope (34S and 18O) and hydro geochemical techniques, it can be possible to find out: sulfate origins and the effective processes/reactions on sulfate concentrations and hydrogen sulfide gas (H2S) production. In this paper, for the first time, the sulfate source in groundwater of Sarpol Zahab and the parameters affecting sulfate concentration and its isotopic compositions (d34S and d18O) in groundwater were studied. Sarpol-e Zahab is located in the catchment area of Alvand river in the west of Kermanshah province, west of Iran. The formations of the region, based on age from old to new, include the Ilam, Gurpi, Amiran, Telezang, Pabdeh, Asmari, Gachsaran, Aghajari, Bakhtiari and Quaternary alluvium formations. Asmari formation and Quaternary alluvial sediments form the largest area of the region. Gachsaran formation contains evaporative materials which is reducing the quality of groundwater in the region. Ilam formation is effective in providing the organic matter required for the bacterial sulfate reduction process.
13 water samples were taken from the water resources (wells, springs and river) of Sarpol-e Zahab region in two steps (December 2014 and September 2015). Measuring field parameters (T, pH, Eh, Ec, and TDS) and sampling of water resources were performed according to the instructions of Groundwater and Geothermal Research Center (GRC), Ferdowsi University of Mashhad. Field parameters were measured by VWR Handheld Multi parameter Research meter at the location of each water source. The concentration of cations and the anions were determined by the devices inductively coupled plasma elemental analyzer (ICP-EA) and ion chromatography (IC), respectively. Chemical and isotopic analyses of all water samples were performed in Ottawa university geochemistry laboratory and Waterloo university isotope laboratory, respectively. The measurement reference for isotopic sulfate and oxygen were VCDT and VSMOW, respectively, and the value isotopic are expressed as permil ((‰.
The sulfate concentrations in different water resources of the region varied from 5 to 950 mg L, however, it is very high in Gandab spring’ water, due to the association with hydrocarbons, and in Patagh Tunnel water, due to discharging of water from Gachsaran Formation (339.6 mg L and 950.1mg L, respectively). Chenarpiran spring has the lowest sulfate concentration because it is located in highlands and is discharged from Asmari formation with good water quality. The amount of  d18O varied between 5.8 to 13.1 VCDT ‰ and the amount of  d34S ranges from 9.5 to 31.8 VSMOW ‰. In Gandab spring’ water, due to sulfate reduction by microorganisms, in addition to the unpleasant smell of sulfide hydrogen (H2S), the d34S and d18O values were enriched than the isotopic composition of other water sources ( about 31.8 ‰ and 10.3 ‰, respectively). In other hand, the Gel va Darreh spring's water, due to the effect of upstream bath waste water (soap and detergent with a value of about 1 ‰ for d34S), indicated depleted isotope values.
 The concentration and isotopic composition of sulfate in the water resources of the Sarpol-e Zahab region are affected by the geological, atmospheric, human and hydrocarbon materials. The impact of human and hydrocarbon factors on the concentration and isotopes of sulfate is local, however, the lithology effects are on all water resources of the region. Since, Gachsaran formation forms the alluvial aquifer bedrock of Ghaleshahin plain, the dissolution of gypsum has an effective role in the hydro chemical evolution of the alluvial aquifer of this plain. The lithology of the area is often limestone and evaporation. Due to the high solubility of these materials in water, they have been able to have a significant effect on sulfate isotopic in water sources. The amount of measured isotopic values indicated that the origin of evaporators and atmospheric sulfate is in water. The dissolution of the evaporation formation has reduced the water quality. The association of bedrock in the Gandab spring has led to have a reduction environment and the occurrence of sulfate reduction and production of hydrogen sulfide gas (H2S). The human activities (by making bath upstream) caused oxidizing conditions, isotopic depletion and contamination of the Glodarreh spring.

Selenium is one these trace mineral elements which is essential for health, immunity and maximum production performance of animals. Selenium is an essential trace element, and its importance for animal health and productivity has been well confirmed. Selenium has known to be involved in enzyme activity and preventing oxidative damage to body tissue. Selenium plays important roles in antioxidant defence systems, prevents cell damage and is necessary for growth, fertility, and immune system in farm animals. Recently, nano -elemental Se has attracted wide spread attention due to its high bioavailability and low toxicity, because nanometer particulates exhibit novel characteristics, such as great specific surface area, high surface activity, a lot of surface active centres, high catalytic efficiency and strong adsorbing ability and over and above the character of low toxicity of Se0. Dietary selenium is an essential trace element for animals and humans with a variety of biological functions. It plays important roles in the regulation of thyroid hormone metabolism, cell growth and antioxidant defence systems thus, together with alpha-tocopherol prevents cells against oxidative stress damage, also these compounds are necessary for growth, fertility, and immune system health in animals and humans. The in situ and in vitro usually use for determining of effect of additives on digestibilities of t feeds. Regarding to the importance of TMR feeding on dairy cattle nutrition, determining of its digestibilities with additive and without additive is necessary. The aim of this study was to investigate the effects of different forms of selenium sources on digestibility of high production lactating dairy cows TMR in vitro and in situ Techniques.

3 male ruminally cannulated sheep, average 43±4.8 kg of BW, were used in a replicated 3×3 Latin square experiment. Sheep were fed twice daily (08:00 and 18:00 h) at maintenance nutrition requirements with a basal diet consisting of 400 g/kg (dry matter) DM of basal concentrates and 600 g/kg DM of forage. Sheep were placed in metabolic cages individually and fresh water was freely available during the experimental period. This experiment was conducted in three periods of 28 days with 21 d adaptation period and 7 d for data tacking. Treatments were: 1. Basal diet + 0.3 ppm nano selenium, 2. Basal diet + 0.3 ppm organic selenium, 3. Basal diet + 0.3 ppm inorganic selenium. In gas production method, 300 mg of each treatment weighted and incubated for 2, 4, 6, 8, 12, 16, 24, 36, 48, 72, 96 hours. The Nylon bag method used to estimate ruminal disappearance of dry matter. Ruminal degradability was measured using nylon bag technique on day 22–28 of the experimental period. The samples 5 g of feed were weighed in 6 cm×12cm nylon bags made of monofilament Pecap polyester . Samples were incubated separately in duplicate bags and suspended in the rumen of each sheep and removed after 0, 2, 4, 8, 12, 16, 24, 36, 48 and 72 hours. All removed bags were rinsed in cold water until the bags were clean; the bags immediately were dried in an oven at 65◦C for 12 h, then 105 ◦C for 24 h in order to determine DM disappearance. in three steps digestion method, about 5 g of feed stuffs weighted in 6 cm×10cm nylon bags made of monofilament Pecap polyester . Samples were incubated separately in duplicate bags and suspended in the rumen of each sheep and removed after 12 hours. All removed bags were rinsed in cold water until the bags were clean; the bags immediately were dried in an oven to determine DM disappearance.

During most of incubation hours, the volume of produced gas was higher in nano selenium, organic selenium, inorganic selenium and control treatments, respectively. However, significant differences between treatments were occurred after 36 h of incubation. The most gas production potential (A) was measured in nano selenium, organic selenium and inorganic selenium compared with control treatments. There were not any significant differences between nano selenium and organic selenium in gas production potential. there wasn’t any significate differences between treatments in degradability of TMR dry matter. In three steps digestion experiment, nano treatment was higher than inorganic treatment in post ruminal digestion of TMR dry matter.

The results showed that the addition of various sources of selenium to the diet may improve rumen function.

Barley grain is one of the major feedstuff in ruminant animal’s nutrition due to its high energy density and lower price than grains such as corn. Rate of barley starch digestion in the rumen is critical issue in high-grain fed ruminants because it is associated with higher performance of animal. Feeding high amount of barley in ruminant animal rations can cause an increase in the incidence of digestive disorders including reduced feed intake, off-feed, acidosis, and liver abscesses. Processing methods such heat treatment can affect physical characteristics and ruminal fermentation of grain. Moreover, barley grains from diverse cultivars are different in their chemical composition and fermentation characteristics due to geographical, environmental and genetic variations as well as their interactions. This experiment was conducted to investigate the effects of variety and heat treatment duration on physical characteristics and ruminal disappearance of barley grain. Two varieties of endemic barley grain (i.e. Sahand and Makoei) were prepared from Seed and Plant Improvement Institute, Karaj, Iran. The grains were roasted in three time duration (5, 10 or 15 min at 120o C) in a cast iron container. The experiment was conducted using a 2*3 factorial design. The samples were dried in 60° oven for 48 hours. Chemical composition was determined according to prescribed procedures of AOAC (2002). Neutral detergent finer (NDF) and acid detergent fiber (ADF) were measured by method of Van-Soest et al. (1991). Bulk density of sample was determined using the method described by Montgomery and Baumgardt (1965). Water holding capacity (WHC) determined by filtration method (Robertson and Eastwood, 1981). Dry matter solubility and ash solubility of samples were determind by method of Giger-Reverdin (2000). Dry matter degradability was measured by in situ technique using two fistulated Ghezel sheep (fed 60% forage + 40% concentrate). Samples were put in the polyester bags and incubated in the rumen for 2, 4, 8, 12, 16, 24, 36, and hours. After the specific incubation periods, bags were washed under running tap water until the effluent was clear and then dried at 55◦C for 48 h. Bags and contents were weighed to estimate DM disappearance (DMD). Kinetic parameters of DM degradation was estimated by the nonlinear regression procedure of SAS (SAS Inst. Inc., Cary, NC) using the model of McDonald (1981) y = a + b (1 − e−c(t−lag)). Data were subjected to analysis as a factorial in a completely randomized design using the General Linear Model (GLM) procedure of SAS. Roasting increased dry matter (DM) content of both barley varieties (P<0.05). An increase in ADF and NDF content of roasted grain was due to decrease in water content of grain. Sahand variety showed higher degradability than Makoei (P<0.05). Dry matter degradability of both barley varieties decreased during 16 to 48 h of incubation due to roasting process (P<0.05); however, these varieties showed different kinetics of degradation during early period of incubation. Roasting increased DM degradability of the Sahand variety during initial 6 h of incubation; however, it showed different pattern in the Makoie variety. The rapid and slow degradable fractions (ie; a and b) decreased by roasting duration in both varieties (P<0.05). Also heat processing of barley grain resulted in a lower effective degradability of dry matter (P<0.01). Effective degradability of Sahand variety was higher than Makoie in all passage rates and all duration of heat processing (P<0.05). Fractional rate of degradability did not change by heat treatment. Makoei variety had higher water holding capacity (WHC), bulk density (BD), dry matter solubility (DS), and ash solubility (AS) than Sahand (P<0.05). Roasting increased WHC and decreased BD in both varieties (P<0.05) but had no effect on DS and AS. There were positive correlations between BD100 and Ether Extract (EE), NDF and ADF content of barley grain, which were 0.53, 0.40, and 0.35, respectively. Also, water holding capacity showed high positive correlation with NDF and ADF content (r =0.84 and r =0.71 respectively) and as expected conversely correlated with EE content (r = -0.61) of barley grain. Both of DMS and AS conversely correlated with EE content of barley grain (r = -0.24 and r = -0.49 respectively). The results of the current study demonstrated that it is possible to decrease ruminal degradability of barley grain by using the right roasting treatment and choosing the proper variety. Makoei variety showed more decrease in fractional rate of digestion, which should be considered in the ration formulation

In this paper firt of all we introduce a generalization of torsion freeness of acts over monoids, called -torsion freeness. Then in section 1 of results we give some general properties and in sections 2, 3 and 4 we give a characterization of monoids for which this property of their right Rees factor, cyclic and acts in general implies some other properties, respectively.

Zarivar Lake، located in west of Marivan -Kurdistan province، is an important natural freshwater body in Iran. Therefore، it is essential to investigate and to protect the water resources of the lake''s catchment area. In this research، to develop the Marivan meteoric water line (MMWL - δ18O vs. δ2H)، to determine the surface (lake) and groundwater interactions، to investigate the factores effecting on water quality، and to find out the origin of cations and anions، water samples (rain، lake and ground waters) were collected during measurements of fild parameters (TDS، EC، pH and T). Based on isotope results، the MMWL is obtained as δ2H = 7. 5 δ18O + 9. 0 and the average δ18O values of rain، groundwater and lake water are -8. 3‰، -7. 0‰، and 5. 5‰، respectively، and δ2H values of these waters are -53. 6‰، -42. 2‰، and 16. 9‰، respectively. Isotopic results also indicate that the origin of groundwater resources is meteoric water with minor evaporation lost، however، the lake water showes relatively high evaporation lost. The d-excess indicates that the influence of the Mediterranean water masses on this area. Bsed on hydrchemical results it seems that the composition of both groundwater and lake water is attributed to natural rock-dissolution proccesses، with anthropogenic sources (fertelizers، waste water، etc.) for some ions (Cl-، SO42) in the lake water. Mineral saturation indexes indicate the existence of very low amount of evaporative minerals، and low retention time of water within the aquifer. Cluster analysis of water quality parameters and sampling locations shows similarity amoung all groundwater samples taken around the lake. In addition، all lake water samples also have similar quality، except samples taken from North and South of the lake، and groundwater discharges into the lake from the North West area. The results of factor analysis indicate that three factors controlling about 83. 3% of total sample variations.

Expressing pain is common in adolescent, however it needs more attention in children. Regarding that such studies are less, the purpose of this study was pain assessment in children. This descriptive study was done in surgery units of three teaching hospitals - Child Care, Shohada, Imam Reza- in Tabriz, 2007. Data collection tools including children's pain check list that was completed by observation and individual interview with head nurses in all units. Validity of scale with content validity and r eliability of scale were evaluated by Cronbach alpha. Finding of this study showed the tool face for review was used only in one unit, But in other units, behavioral symptoms such as crying and malaise (75%) were considered. There weren’t any fact review or registration of pain in units. Acetaminophen was the most common drug for pain relief and distraction (%100), toys (%75) and placebo (%25) were the most common non-drug methods. For reducing pain during painful procedures, Lidocaine was used for embedding fully catheter and nasogastric tube in one of the units. It seems that pain assessment and relieving pain are not well arranged. Therefore, it is necessary to prepare facilities for control of pain in children hospitals.