ROLE OF VENTILATION, CALCIUM AND BORON ON SHOOT TIP NECROSIS AND HYPERHYDRICITY REDUCTION OF IN VITRO ROORSTOOCKS OF PISTACIO ‘BADAMI’ ȘI ‘UCB1’

Shoot tip necrosis (STN) is one of the main physiological disorders in the micropropagation of pistachios. In the current study, the effects of CaNO3.4H2O at 196 mg/L and 291 mg/L, H3BO3 at 196 mg/L and 291 mg/L, and CaCl2.2H2O at 2,980 mg/L on STN and hyperhydricity reduction of Pistacia vera L., ‘Badami’ and ‘UCB1’ rootstocks were assessed, compared to the MS standard medium containing 3% sucrose, 0.7% agar supplemented with benzyladenine (BA) (1.5 mg/L), indole butyric acid (IBA) (0.1 mg/L). For ventilation parameter, filter container vessels with a 50-µm microporous polypropylene membrane (Pardis®) were used. Based on the results, an increase in calcium chloride content of the MS standard medium prevented hyperhydricity in the UCB1 rootstock, whereas it increased STN, yellow leaves, decreasing the multiplication of shoots in the ‘Badami’ rootstock. The results also showed that increasing boric acid from 196 mg/L up to 291 mg/L decreased STN in the UCB1 rootstock and increased this disorder by 37% in the ‘Badami’ rootstock. Ventilation showed no significantly reducing effect on the percentage of STN in the regenerated shoots of the ‘Badami’ rootstock, whilst it decreased the STN of the ‘UCB1’ rootstock to the lowest percentage. For the ‘Badami’ rootstock, CaNO3.4H2O at 196 mg/L led to the highest proliferation rate, shoot height, shoot diameter, and leaf number, but for the ‘UCB1’ rootstock, an increase in the concentration of CaNO3.4H2O up to 291 mg/L under ventilated conditions resulted in an increase in proliferation, shoot height, and shoot diameter.

Analysis of a Fire in an Apartment of Timber Building Depending on the Ventilation Parameter

In modern buildings are also currently used the wooden-based construction systems. A wide range of uses the timber constructions in apartment buildings is a vision of the countries of the EU. The use of timber and the other recyclable materials in apartment buildings creates the precondition for the implementation, operation and disposal of environmental impacts of the EU 2020 Strategy. In the long term is important to transform the construction of buildings to a sustainable standard, which the application of wood in construction supports. Currently, the fire height of timber-based residential construction in most EU countries is limited to 5 storeys, provided that the timber structures are fire-protected. This paper deals with the influence of the ventilation parameter in the time and the intensity of the gas temperature during a fire in a model of an apartment building with a timber load-bearing structure. The load-bearing structure is made of CLT panels, with a mixed structural unit, i.e. with fire-resistant cladding of all load-bearing and fire-dividing structures. FDS (Fire Dynamics Simulator - PyroSim software) is used for dynamic simulations of fire in the model apartment.

Evaluating the Impact of Ventilator-Associated Parameters on Ventilation Free Days of non-ARDS Patients in ICU.

Background: Critically ill patients are not only mechanically ventilated because of ARDS, what kind of ventilation parameter setting is the optimal ventilation strategy for non-ARDS ICU patients?Methods: A retrospective cohort study for non-ARDS patients who received mechanical ventilation (MV), performed univariate, multivariate regression analysis, covariate balancing propensity score and inverse–probability–of–treatment weighting, and machines learning models to predict different outcomes. The included predicted factors are four parameters of mechanical ventilation (Driving pressure (DP) and its mediation of tidal volumes (VT) and positive end-expiratory pressure (PEEP), mechanical power (MP)), and the primary outcome was the ventilator-free days (VFD) at day 28.Results: The study included 2932 patients, low DP, low PEEP and low MP for non-ARDS patients could prolong VFD at day 28, reduce in-hospital mortality and length of hospital stay. However, the VT has no prognostic significance for the population. Among machine learning models with VFD, the randomforest had the best prediction.Conclusions: For non-ARDS patients who receive invasive ventilation for at least 48 hours, low DP, low PEEP and low MP are beneficial to the population. However, the effect of VT is inconclusive.

Research of Mine Ventilation Parameters Tester Based on ZigBee Technology

Mine ventilation parameters wireless tester which is based on ZigBee technology is proposed and designed according to the deficiencies of conventional ventilation resistance test method and mine ventilation resistance testing principle. The instrument is capable of simultaneously measuring between a certain range of two points of the temperature, humidity and barometric pressure in the roadway. And it can transmit test data by wireless to the main instrument. At the same time, the main instrument would display and storage the date for post-processing. The development of sensor technology,electronics and information technology and wireless communication technology make developing high-precision mine ventilation parameter analyzer for mine ventilation resistance test to be a reality.

3He MRI-based assessment of posture-dependent regional ventilation gradients in rats

A recently developed method for quantitative assessment of regional lung ventilation was employed for the study of posture-dependent ventilation differences in rats. The measurement employed hyperpolarized 3He MRI to detect the build-up of the signal intensity after increasing numbers of 3He breaths, which allowed for computation of a regional ventilation parameter. A group of six anesthetized rats was studied in both supine and prone postures. Three-dimensional maps of the ventilation parameter were obtained with high spatial resolution (voxel volume ∼2 mm3). Vertical (dorsal-ventral) gradients of the ventilation index, defined as the regional ventilation normalized by the average ventilation within the whole lung, were investigated. Variations in the regional distribution of the ventilation parameter, as well as of the ventilation index, could be detected, depending on the posture of the rats. In supine posture, ventilation was elevated in the dependent parts of the lungs, with a linear gradient of the ventilation index of −0.11 ± 0.03 cm−1. In prone posture, the distribution of ventilation was more uniform, with a significantly ( P < 0.001) smaller gradient of the ventilation index of −0.01 ± 0.02 cm−1. It is concluded that the 3He MRI-based method can detect and quantify regional ventilation gradients in animals as small as the rat and that these gradients depend on prone or supine posture of the animal.