Homogenates of salivary glands from Locusta migratoria possess phenoloxidase (PO) activity. This study investigates the activation of prophenoloxidase (PPO) in these glands in vitro. When freshly dissected salivary glands from L. migratoria are incubated with the immunogen laminarin, and then homogenized, a 4-fold increase in PO activity (expressed as a percentage of the total PO) can be measur...

Aims: Currently, the blue light of resin curing unit is frequently used in dental treatment. However, the influence of the blue light irradiation on oral tissue is not clear. The aim of this study was to elucidate the effect of dental blue light irradiation on vascular smooth muscle. Methods: Isolated rat descending aorta was suspended in a superfusion chamber and superfused continuously with K...

Culture media for mouse preimplantation development are usually derived from two basic solutions: Krebs-Ringer and Tyrode. We have used outbred mice (OF1) to make a comparative analysis of derived media of both types and their success in sustaining development from the one-cell to the blastocyst stage. The best results (up to 50%), in terms of overcoming the two-cell block and sustaining develo...

Amaç: Kardiyopulmoner Bypass (KPB) sırasında prime solüsyonu olarak kullanılan farklı sıvıların oksidatif stresi nasıl etkilediğini ortaya koyarak açık kalp cerrahisine katkı sağlamayı amaçlıyoruz. Yöntem: Bu çalışmaya çeşitli nedenlerle ameliyatı geçiren 21 erkek ve 9 kadın olmak üzere toplam 30 hasta dahil edildi. Hastalar solüsyonlarına göre 1. Grup: Laktatlı Ringer, 2 Isolyte S iki gruba ay...

Small (18-25 microm diam) dorsal root ganglion (DRG) neurons are known to express high levels of tetrodotoxin-resistant (TTX-R) sodium current and the mRNA for the alpha-SNS sodium channel, which encodes a TTX-R channel when expressed in oocytes. These neurons also preferentially express the high affinity receptor for nerve growth factor (NGF), TrkA. Levels of TTX-R sodium current and of alpha-...

It has been recently indicated that relaxation of the guinea-pig taenia by Q-adrenergic stimulants or papaverine is associated with increased concentration of cyclic AMP (cyclic adenosine-3', 5'-monophosphate) in the cells (1-5). On the other hand cyclic GMP (cyclic guanosine-3', 5'-monophosphate) is present in considerable amounts in various mammalian tissues, particularly in the gastrointesti...

We investigated the current reformulation of the commercially available intraocular preparation of carbachol for its effect on corneal thickness and endothelial cell ultrastructure. A 15-minute perfusion in the specular microscope with 0.01% carbachol caused a significant increase in the corneal swelling rate, which returned to control values after 75 minutes of reperfusion with Krebs Ringer bi...

y-tial intermetallic alloy have a good potential for use as biomaterial, due to its good corrosion resistance. in this paper, two fundamental electrochemical techniques namely electrochemical impedance spectroscopy and potentiodynamic anodic polarization were used to evaluate the corrosion performance of g-tial in ringer's solution. surface modification treatments were employed with the pu...

While working on the heart of Rana tigrina by the perfusion method recommended by Burridge (1935), I started with a fairly concentrated solution of pure synthetic thiamin chloride in concentration of one part in 1,000 of Ringer and watched the results. No sooner the drug was perfused than the heart, which had been beating normally so far, was suddenly arrested in diastole and remained as such t...