Propranolol (PL), a non-selective beta-blocker, is a cardiovascular drug widely used to treat hypertension. The present study was concerned with assessing the cytogenetic effects of this drug on Chinese hamster ovary (CHO) cell line. MTT assay was then carried out to determine the cytotoxicity index (IC50) of the drug. The IC50 value of PL was 0.43±0.02 mM. To investigate the clastogenic effect...

A first principles model of a cement grinding circuit is developed for the purpose of multi-variable model predictive control (MPC). The model is based on a series of mixed flow reactors with an ideal screen to model flow between the two chambers in the ball mill. The separator is modelled by efficiency curves. Breakage of the particles is modelled as a first order process in terms of functions...

Cutting tools are widely used in manufacturing processes and drilling is the most commonly used machining process. Although drill-bits used in drilling may not be expensive, their breakage can cause damage to expensive work piece being drilled and at the same time has major impact on productivity. Predicting drill-bit breakage, therefore, is important in reducing cost and improving productivity...

BACKGROUND Implant breakage after the fixation of traumatic fractures is rare; however, when it occurs, it is debilitating for the patients and a challenge for surgeons. The purpose of this study was to analyze and identify the independent risk factors for implant breakage of traumatic fractures treated with plate osteosynthesis. METHODS We reviewed the medical records of patients with a frac...

the rotor of enegelberg whitener was equipped with a screw conveyor to reduce broken rice percentage. according to preliminary experiments this modification could reduce broken rice percentage about 2.5%. further experiment was performed to determine the effect of rotor speeds and blade positions on white rice quality. to do this, five rotor speeds, consisting 500, 600, 700, 800 and 900 r.p.m a...

It is difficult to extract small and dense objects with random state, such as grain impurity, in image of vehicle-mounted dynamic rice flow on combine harvester. Therefore, this paper improves Deeplabv3+ by constructing MobileNetv2 coding layer adding ECA(Efficient Channel Attention) Encoder Decoder improve extraction accuracy high-dimensional features images a large number state. In addition, ...

Composite or closely linked maize (Zea mays) Ac/Ds transposable elements can induce chromosome breakage, but the precise configurations of Ac/Ds elements that can lead to chromosome breakage are not completely defined. Here, we determined the structures and chromosome breakage properties of 15 maize p1 alleles: each allele contains a fixed fractured Ac (fAc) element and a closely linked full-le...

Plates of austenitic stainless steel are often used in orthopedic surgery for fixing ends of the broken bones and for repairing fractures. The paper analyzes a premature breakage of six plates for fixing broken bones with different patients during their recovery. Each plate's breakage can induce serious aftermaths such as a new surgery, unexpected undesired complications and a prolonged healing...

Detection of tool breakage is very important for automated machining operations. This paper presents a negative-selection algorithm for tool breakage detection. The method is inspired by the defense mechanism of the immune system, which discriminates between self and non-self. Here self is deened to be normal cutting operations and non-self is any deviation beyond allowable variation of the cut...

To investigate whether the fragile X syndrome is associated with a generalised chromosomal instability, we compared the frequency and distribution of chromosomal breakage in lymphocytes grown in low folate medium from normal subjects and from patients with the syndrome. Although low folate conditions increased the rate of chromosome breakage, no difference in frequency or distribution of chromo...