International Journal of Advanced Biological and Biomedical Research
Volume:6 Issue: 4, Autumn 2018

The purpose of this study was to examine the evaluating the potential of seed priming techniques in improving germination and early seedling growth of Aeluropus Macrostachys under salinity stress condition. This study was performed at the Islamic Azad University in Baft city which is located in southeast of kerman province (2250 meters above the sea level, 92º 17 N latitude and 56º 36 E longitude, and 220 mm annual rainfall). This experiment was conducted a completely randomized design. The factors examined include four levels of seed priming, control (without priming) with NaCl and CaCl2 KCl and five salinity levels (0, 4, 8, 12, 16 Desysimenz/m), respectively.In this experiment traits such as germination percentage, speed of germination, radicle length and shoot length were measured. Data were analyzed by using General Linear Models procedure of SAS software. In addition, Means were compared using Duncan’s multiple  range test. Results of this study showed that different seed priming treatments improved shoot and radicle length, germination percentage and speed of germination of Aeluropus Macrostachys specie.

Artificial fertilizers and mainly organophosphate herbicide are used by farmers to enhance their crop and control pests. In order to investigate the effects of Pretilachlore, fingerlings of caspian roach were exposed to a range of concentrations of toxin close to those of estuary for 96 h. Due to movement of these fingerlings in a gradient of salinity from freshwater to brackishwater some physiological parameters were also measured and compared in these environments. Cortisol levels were significantly increased in all groups exposed to Pretilachlore, and after transferring to brackishwater the amount of cortisol was increased in control group as well. K+ and Cl2- were increased in experimental groups, Na+ changes were irregular but more changes were observed in the high concentrations of toxin. The results indicate that, fingerlings exposed to organophosphate herbicides in freshwater, may encounter some problems in physiological adaptation for entering the sea which in turn would have a negative impact on returning adults and brooders.

Livestock have made major contribution to human societies by providing food, shelter, fuel, and services.  Sheep and goat are economically important livestock play an important socioeconomic role for small and large farmers in Libya.  Small ruminant animal meat is popular for Libyan customers, and demand is particularly high during religious and cultural festivals.  Small ruminants is valued for their meat, milk and manure, in addition, wool, hair and skin are becoming more attractive by modern and traditional industry.  They are popular among various communities, however, in societies.  Small ruminant animals play a significant role in the welfare of rural families since they provide both meat and milk as sources of energy and protein for human consumption.  Small stock requires relatively little capital to acquire and to feed compared to large stock.  Sheep and goat play an important role in most small-scale farming systems else where in the world.

All aquatic organisms are directly or indirectly affected by the physical characteristics of their environment, especially the chemical composition of the water. The high concentration levels, damage tissues and interfere with the normal growth and proliferation. The aim of this research was to Investigation acute toxicity of ZnSO4 and CuCl2 to Gambusia holbrooki by static bioassays at different water hardness. The acute toxicity of selected heavy metals to fish was determined in soft, hard and very hard water, respectively (25, 125 and 350 mg/L as CaCO3). Results showed that water hardness had a significant effect in terms of Cu and Zn toxicity in fish. The toxicity of Cu and Zn increased with decreasing water hardness. Results indicated that an increase in water hardness (from 25 to 350 mg/L as a CaCO3) substantially reduced the toxicity of Cu (up to 38-fold) and Zn (up to 264-fold) to fish at 96 hours exposure. The 96 hours LC50 values for fish were higher in the hard and very hard water compared to the soft water. Water hardness had a much smaller effect on the acute toxicity of Cu than the Zn in fish. Cu toxicity in all water types was higher than Zn toxicity forfish. In polluted areas, it is recommended to expand the aquaculture activities in the water resources that their hardness is higher than the average water hardness in the environment. The toxicity effect of other heavy metals on more diverse aquatic animals should be investigated in the future research.

One of the possible ways to ensure future food needs of an increasing world population involves the better water use through the development of crop varieties which need less water and are more tolerant to drought. In order to study the response of twenty landraces of bread wheat to drought stress, an experiment was conducted in a randomized complete block design with three replications under two irrigated and water stres conditions during 2010-2011 cropping season. Sixteen  drought tolerance indices including stress tolerance index (STI), stress susceptibility index (SSI), tolerance index (TOL), harmonic mean (HM), geometric mean productivity (GMP), mean productivity (MP), yield index (YI), yield stability index (YSI), sensitive drought index (SDI), drought resistance index (DI), abiotic tolerance index (ATI), relative decrease in yield index (RDY), stress non-stress production index (SNPI), modified stress tolerance index (MSTI), relative drought index (RDI) and stress susceptibility percentage index (SSPI) were calculated based on grain yield under drought (Ys) and irrigated (Yp) conditions. Grain yield in stress (Ys) condition was significantly and positively correlated with STI, GMP, MP, HM, YI, DI, RDI, YSI, SNPI, K1STI and K2STI. Grain yield in non-stress (Yp) condition was significantly and positively correlated with STI, MP, GMP, HM, YI, DI, ATI, K1STI, K2STI and SNPI. Grain yield in stress and non-stress conditions was significantly and negatively correlated with SSI. Results of this study showed that the indices K1STI, K2STI, SSPI, RDI, ATI, SNPI, and DI can be used as the most suitable indicators for screening drought tolerant cultivars. Cluster analysis classified the genotypes into three groups i.e., tolerant, susceptible and semi-tolerant or semi-sensitive to drought conditions. Therefore they are recommended to be used as parents for improvement of drought tolerant cultivars.

Susceptibility-weighted imaging (SWI) has continued to develop into a powerful clinical tool to visualize venous structures and iron in the brain and to study diverse pathologic conditions. It is a new art which evaluates and exploits the properties of blood, iron and other tissues. It is a magnitude or filtered phase images or combination of both, obtained with high-resolution 3D fully velocity compensated gradient echo sequence, The paramagnetic substance like deoxyhaemoglobin, product of blood degradation, ferritin, a non-heme iron are known causes of magnetic susceptibility in the tissues. SWI offers a unique contrast, different from spin attenuation, T1, T2, and T2. Edema is identical on SWI as on FLAIR because of short TR and long TE but does not reveal CSF signal because of low flip angle.SWI is not affected by low flow velocities and very useful for detecting vascular pathologies. With the advent of parallel imaging and the greater availability of clinical 3T MR images, it is now possible to image the entire brain with SWI in roughly 4 minutes.SWI images are best at higher SNR ratio, so quality is good at 3 T machine. It can also be performed on 1.5 T machine. SWI has been found to provide additional clinically useful information that is often complementary to conventional MR imaging sequences used in the evaluation of various neurologic disorders, including traumatic brain injury (TBI), coagulopathic or other hemorrhagic disorders, vascular malformations, cerebral infarction, neoplasms, and neurodegenerative disorders associated with intracranial calcification or iron deposition. As neuroradiologists become more aware of these various applications and as advances in software technology permit easier acquisition and better interpretation. Although SWI interpretation will require some experience, increasing its clinical use will, no doubt, reveal new applications. To date, the strongest indications for SWI are in neurovascular and neurodegenerative disease applications. On the basis of additional information provided by SWI, we can define a standard neuroprotocol, including conventional MR imaging, diffusion tensor imaging, PWI, and SWI. The major areas are the following: aging, atherosclerosis,MS,occult vascular disease, stroke, trauma, and tumors.With the new advent we can not only diagnose the pathology but also can monitor the progression of the neurological disease process.

For an optimum use of natural resources in the sustainable development trend, there is a need to identify ecological resources in the shortest period of time and minimum possible cost. In this article, we aimed Management ecosystem by Assessment of plant covers changes at Taleghan Township in a twenty year period. Percentage of landscape and number of patch were among the metrics that were calculated. The patch surface showed that the greatest plant cover change belonged to agriculture class that was decreased from 15.72 percent in 1987 to 0.67 percent in 2007 and limiest land use/cover change belonged to range class that was decreased from 62.8 percent in 1987 to 46.55 percent in 2007. What was significant from an environmental point of view was that the amount of bare lands was increased more than two fold (from 20.22 percent in 1987 to 48.3 in 2007) which indicates unexpected vegetation cover degradation. In this regards the tsunami of money have impose and accelerated changes in land use; In addition many of dry farming lands have been abandoned and this cased to convert that into the poor grasslands and bare lands. Moreover, we suggest that land use planning will be implemented in the other area of Alburz so that each land use will be applied in the suitable place.

Dena Biosphere Reserve located in Iran and is a 550 Biosphere Reserve in the worlds. This research was investigated in the two protected and non-protected areas, in a Dena Biosphere Reserve, Kohkeloye va Boyrahmad province, and central zagros forest, southwest of Iran. Inventory methods designed by systemetic-randomaiz method by use the rectangular plots that were 15×30 meters in the 100×100 m Net. In each plots information include qualities and quantities tree parameter measured. T-test was used to analysis of mean quantities tree parameter differences between protected and non-protected area. Data analyzing was done by Excel and SPSS16 software’s. Results showed that the DBH distribution in the reduced uneven- aged stand in protected area and reduced even aged in the non-protected area. Results showed that the mean of forest characteristics including DBH, height, canopy cover and, and density in the protected area are 38.5 (±5.5), 6.51 (± 0.9), 38 (±5.5) and 530 (±35) and this quantities parameters in protected area higher the non-protected area. Overall results showed that the qualities and quantities tree parameters in the non-grazed area higher the grazed area, and grazing has a negative effect on the qualities and quantities tree parameters.

Spatial pattern of trees can possibly indicate stand history, population dynamics, and species competition. This research was investigated in the Chahartagh forest reserve, Ardal region, chaharmehal and Bakhtiari Province, Central Zagros forest, and southwest Iranian state. In this study 53 hectare of the study area was selected and perfect inventory.  Information includes the position and kind of tree, height and two diameters of crown were recorded. To study of spatial pattern used the quadrat sampling methods. Inventory method designed in the base of systematic-randomize methods by use the nearest individual, and inventory accrued in the five treatment and measured 5×32 (total 160) sample (measured the nearest individual). To analysis of spatial pattern used the distance method and Johnson & Zimmer and Pielou indexes. Data analyzing was done by Ecological Methodological software’s. all applied indicators showed a clumped pattern for Crataegus sp chahartagh forest reserve in Central Zagros region, and Western Iranian state of Iran.