In Übereinstimmung mit der vorangegangenen, theoretischen Ableitung hängen der Widerstand (R0) und die Stromspannungs [i-E) -Kurven von Mikropipetten, die als Elektroden in der Elektrophysiologie verwendet werden, vom Radius r0[cm] und der Konzentration c[Äq./cm 3] des Elektro­ lyten ab. Große Werte von r0 c [Äq./cm2] entsprechen Volumenleitung in der Öffnung. /?0vol ^ 1/ r0 c Abb. 3; die i-£-K...

Background and objectives: Free radicals and other oxidants have important roles in liver cell toxicity. Some natural products are potent scavengers of oxidative agents. Crocus caspius is an endemic species of Caspian forest. Flowers of Crocus genus contain phenolic compound and carotenoid as antioxidant agent. This study investigated the antioxidant and hepat...

Methanol extracts of different plants namely, Trichodesma africanum (Boraginaceae), Cleome rupicola (Capparceae) and Ochradenus baccatus (Resedaceae), were tested for larvicidal activity against 4 instar larvae of Aedes caspius and Culex pipiens mosquitoes. All plant extracts tested against Ae. caspius showed 100% mortality at 10μg/ml except the stem of O. baccatus which showed 90% mortality. H...

Mosquito-borne diseases are major health problems worldwide. Serological responses to mosquito saliva proteins may be useful in estimating individual exposure to bites from mosquitoes transmitting these diseases. However, the relationships between the levels of these IgG responses and mosquito density as well as IgG response specificity at the genus and/or species level need to be clarified pri...

Biogenic methods are an effective alternative to chemical in the preparation of nanoparticles. Our study used Crocus caspius extract synthesize gold nanoparticles (CC-AuNPs) a green manner. The eco-friendly synthesis AuNPs was conducted by optimizing temperature and concentration HAuCl4 extract. Synthesized CC-AuNPs were characterized using TEM, SEM, EDX, XRD, FTIR, UV–Vis spectroscopy. prepare...

Reactive oxygen species (ROS) can lead to haemolysis and eventually to diseases such as thalassemia and sickle cell anaemia. Their action can be counteracted by the antihaemolytic activity of therapeutic agents. The aim of our study was to identify plants that most efficiently counteract ROS-caused haemolysis. From ten plants known for their antioxidant activity (Orobanche orientalis G. Beck, C...

Most flowers display distinct colour patterns comprising two different areas. The peripheral large-area component of floral colour patterns attracts flower visitors from some distance and the central small-area component guides flower visitors towards landing sites. Whereas the peripheral colour is largely variable among species, the central colour, produced mostly by anthers and pollen or poll...

Nowadays it is very desirable to investigate and discover new antibacterial and antioxidant agents from natural products and medicinal plants. The current study was conducted to examine the antimicrobial and antioxidant properties of an endemic plant named Caspian saffron, Crocus caspius. After collecting C. caspius and drying them in the shade, ethanol, methanol and hydroalcohol extracts were ...

The present study aimed to identify the mosquito vectors distributed throughout AL-Ahsaa district situated in the eastern region of Saudi Arabia. Mosquito larvae were collected seasonally for one year (October 2009 to September 2010) from different breeding sites in seven rural areas utilizing long aquatic nets. Salinity and pH of these breeding sites were also measured seasonally. The survey r...