The relationships between chlorophyll-a dynamics and certain physical and chemical variables in the temperate eutrophic Çaygören Reservoir, Turkey

The Çaygören Reservoir was sampled monthly from February 2007 to January 2009 at three stations to determine the relationships between the chlorophyll-a (Chl-a) dynamics and soluble reactive phosphorus (SRP), nitrate-nitrogen (NO3-N), ammonium-nitrogen (NH4-N), water discharge, water transparency, water temperature (T), specific conductance (SC) and pH. Thermal stratification occurred in the reservoir from May to September. The maximum chlorophyll-a concentrations were measured (using a YSI multi probe) in the fall and the minimum concentrations were recorded in the winter. Differences in the concentrations of chl-a , SRP and NO3-N were significant among seasons (p0.01). The differences in the Secchi disk transparency were significant both among sampling stations and seasons (p<0.05). The results of this study suggest that high chl-a concentrations resulted from the increase in available light in the spring and deep mixing in the fall which provided nutrients needed for phytoplankton growth

Monocular Vision SLAM for Indoor Aerial Vehicles

This paper presents a novel indoor navigation and ranging strategy by using a monocular camera. The proposed algorithms are integrated with simultaneous localization and mapping (SLAM) with a focus on indoor aerial vehicle applications. We experimentally validate the proposed algorithms by using a fully self-contained micro aerial vehicle (MAV) with on-board image processing and SLAM capabilities. The range measurement strategy is inspired by the key adaptive mechanisms for depth perception and pattern recognition found in humans and intelligent animals. The navigation strategy assumes an unknown, GPS-denied environment, which is representable via corner-like feature points and straight architectural lines. Experimental results show that the system is only limited by the capabilities of the camera and the availability of good corners

Mating type idiomorphs of Pyrenophora teres in Turkey

Pyrenophora teres f. maculata (Ptm) and Pyrenophora teres f. teres (Ptt) causes spot form and net form of net blotch diseases of barley, respectively. Although both forms of P. teres are morphologically similar, their symptoms and genetic background differ. In this study, 175 single spore (109 Ptm and 66 Ptt) isolates obtained from different regions of Turkey were evaluated for their mating type distribution and prevalence. Fungal isolates of both forms were verified using species-speci.c polymerase chain reaction (PCR) primers. For mating type determination studies, duplex PCR was performed using MAT-specific single nucleotide polymorphism primers. Sixty and 49 of 109 Ptm isolates were found as MAT1-1 and MAT1-2 types, respectively and 43 and 23 of 66 Ptt isolates were found as MAT1-1 and MAT1-2 types, respectively. These results show the possibility of sexual reproduction among the Ptm isolates in Turkey and Ptt population of Central Anatolia, Turkey. However, the overall pattern of Ptt isolates did not support the sexual reproduction hypothesis in Turkey. Sexual reproduction in the life cycle of P. teres is important since it could lead to genetic and pathogenic variation. As a result of new sexual combinations more virulent pathotypes of P. teres may occur

Effects of probiotic and organic acid on performance and organ weights in broiler chicks

ABSTRACT This experiment was conducted to study the effects of probiotic (P) and organic acid (OA) on performance and some organs in broiler chicks. Seventy two 1-d-old (male and females) broiler chicks (Ross PM) consisted of 4 groups (Control, 02 % Probiotic (Saccharomyces cerevisiae), 04 % OA and 02 % P + 04 % OA, each of which had 25 chicks. The analysis of the data indicated that no significant effect between the groups was found in body weight, feed intake, hot carcass, gizzard, liver and large intestine weight, but a significant difference in small intestine weight was observed (P&lt;0.001). According to the results of this study, it was found that the provision of mentioned probiotic or organic acids to the diet of broiler throughout 42 days had no effect on performance

[3-Hy­droxy­methyl-1,4-bis­(4-methyl­phen­yl)naphthalen-2-yl]methanol

In the title compound, C26H24O2, the crowded naphthalene ring system is essentially planar [maximum deviation of 0.027 (2) Å for one of the C atoms of the unsubstituted ring]. In the crystal, mol­ecules are connected by O—H⋯O hydrogen bonds into chains along the a axis. Pairs of the oppositely oriented chains are further cross-linked by O—H⋯O hydrogen bonds, forming infinte bands of alternating R 4 4(8) dimers and R 2 2(14) motifs

At The Five And Ten Cent Store

https://digitalcommons.library.umaine.edu/mmb-vp/4681/thumbnail.jp

Efficacy of Spinetoram for the Control of Bean Weevil, Acanthoscelides obtectus (Say.) (Coleoptera: Chrysomelidae) on Different Surfaces

Simple Summary Contact toxicity of spinetoram on three different surfaces, concrete, ceramic floor tile and laminate flooring, against Acanthocelides obtectus (Say.) was evaluated in laboratory bioassays. Our results provide data on the insecticidal effect of spinetoram for the control of A. obtectus on various surfaces; however, its efficacy varies according to the surface type, exposure time and concentration. In conclusion, our laboratory tests indicated that spinetoram at 0.025 and 0.05 mg active ingredient (AI)/cm(2) achieved satisfactory control at relatively short exposures by contact action of A. obtectus adults on three surfaces, commonly encountered in legume storage facilities and warehouses. In this study, the contact toxicity of spinetoram on three different surfaces, concrete, ceramic floor tile and laminate flooring, against Acanthocelides obtectus (Say.) (Coleoptera: Chrysomelidae) was evaluated in laboratory bioassays. Different concentrations were evaluated ranging from 0.0025 to 0.05 mg AI/cm(2), against adults of A. obtectus. Adult mortality was measured after 1-, 3-, 5- and 7-day exposure. After 1-day exposure, the mortality was low on all surfaces, ranging from 0 to 27.2%. After 5- and 7-day exposure, spinetoram at concentrations of 0.01 mg/cm(2) and above achieved 100% or close mortality on concrete and laminate flooring surface, whereas low concentrations (0.0025, 0.005 and 0.0075 mg AI/cm(2)) resulted in significantly lower mortality levels, ranging from 1.6 to 30.8%, than high concentrations. In the case of ceramic floor tile surface, spinetoram treatments at all tested concentrations did not result in 100% mortality. Significant differences were recorded among the surfaces, depending on concentrations and exposure intervals. After 3-, 5- and 7-day exposure, mortality levels on ceramic floor tile surface were generally higher at low concentrations than those on the concrete and laminate flooring surfaces, whereas those on concrete and laminate flooring surfaces were significantly higher at high concentrations than ceramic floor tile surface. These results indicate that spinetoram at 0.025 and 0.05 mg AI/cm(2) achieve satisfactory control at relatively short exposures on common types of surfaces and thus can be used as an effective insecticide against A. obtectus