in order to investigate the effects of hinokitiol (0.1, 1, 5 and 10 micromolar), humic acid (100, 500. 1000 and 10000 ppm), sucrose (2.5, 5, 7.5, and 10 percent), and silver thiosulphate (0.25, 0.5, 1 and 2 mm) treatments on longevity and some quality characteristics of cut yelloween lily flowers, an experiment was conducted in the form of a completely randomized design of two replications (tim...

A simple and direct spectrophotometric methods for determination of zinc are based on reaction with azo dyes: 1-(2-pyridylazo)-2-naphtol (PAN) and Chromothrop 2B in the presence benzyldimethyldodecylammonium bromide (BDDABr) have been developed. Optimum concentrations of PAN, Chromothrop 2B, BDDABr and pH ensuring maximum absorbance were defined. The effect of foreign ions was elucidated. The c...

a simple, accurate and rapid high performance thin layer chromatography (hptlc)-densitometric method was developed for separation and determination of cetirizine (cet) as a long acting antihistamine and montelukast (mon) as an antileukotriene in pharmaceutical dosage forms. the compounds were separated on silica gel 60 f254 hptlc plates using a mixture of ethyl acetate : methanol : ammonia solu...

Electrical properties of locust leg muscle fibers were studied by means of intracellular electrodes. In most fibers, a depolarizing current pulse initiated a local response. A delayed decrease in membrane resistance appeared with more than about 10 mv depolarization. In some fibers a regenerative response also was found. Membrane constants were measured, applying the short cable model. The valu...

Adequate water intake, supporting both cardiovascular function and evaporative cooling, is a critical factor in mitigating the effects of heat waves, which are expected to increase with global warming. However, the regulation of water intake during periods of intermittent heat exposure is not well understood. In this study, the effects of access to water or no access during intermittent heat ex...

in this work the acidity constants of thiamine in water and water-triton x-100 micelle media solutions, at 25 °c, have been determined spectrophotometrically. to evaluate the ph- absorbance data, a resolution based on the combination of soft-and hard-modeling is applied. the acidity constants of all related equilibria are estimated using the whole spectral fitting of the collected data to an es...

The purpose of this study was to relate the proportions of bone-supported root length of a 2D view into the amount of a 3D bone-attached root surface area (BA-RSA) by using a dental laser scanner examination. White-light 3D scanning technology was used to probe 36 maxillary and 35 mandibular single-rooted premolars. The bone-supported height (BSH) and BA-RSA at designated levels (95-25%) were c...

We describe a new method for determining the concentration of total Ca in whole skeletal muscle samples ([CaT]WM in units of mmoles/kg wet weight) using the Ca-dependent UV absorbance spectra of the Ca chelator BAPTA (1,2-bis(2-aminophenoxy)ethane-N,N,N',N'-tetraacetic acid). Muscle tissue was homogenized in a solution containing 0.15 mM BAPTA and 0.5% sodium dodecyl sulfate (to permeabilize me...

PURPOSE To determine the impact of incubation solution composition on protein deposition to silicone hydrogel (SH) contact lenses using a simplistic and a complex model of the tear film. METHODS Three SH materials--senofilcon A (SA), lotrafilcon B (LB), and balafilcon A (BA)--were incubated in two different solutions; Solution A was a simplistic augmented buffered saline solution containing a...