Effect of the Gene Knock-out and Gene Knock-in on Mannitol Production in .

can be used to produce mannitol by fermentation, but the mannitol productivity is not high. Therefore, in this study modify the chromosome of by genetic methods to obtain high-yield strains of mannitol production. In this study, gene knock-out strains and gene knock-in strains were constructed by a two-step homologous recombination method.

Early and late Iron supplementation for low birth weight infants: a meta-analysis.

Background: Iron deficiency in infancy is associated with a range of clinical and developmentally important issues. Currently, it is unclear what is the optimal timing to administer prophylactic enteral iron supplementation in preterm and very low birth weight infants. The objective of this meta-analysis was to evaluate early compared with late iron supplementation in low birth weight infants.

Risk factors for recurrent respiratory infections in preschool children in china.

Objective: To identify and compare risk factors for recurrent respiratory infections in preschool children between resident and floating population in Yiwu, China.

Methods: Investigations was conducted in resident and floating population in Yiwu city, Zhejiang province. A structured questionnaire was used to collect information on influence factors.

Associations of IL-2 and IL-4 Expression and Polymorphisms With the Risks of Mycoplasma pneumoniae Infection and Asthma in Children.

Introduction: Asthma is an inflammatory disorder of the airways and the symptoms of asthma could be exacerbated by Mycoplasma pneumoniae infection. Interleukin-2 and interleukin-4 have been implicated in immune and inflammatory reactions. We examined the associations of IL2 and IL4 polymorphisms and expression with the risks of asthma and M.

Comparison of risk factors for recurrent respiratory infections between urban and rural preschool children in Yiwu, China.

Background: Many studies have shown an association between the risk of increased recurrent respiratory infections and socioeconomic and fostering factors, but often only a few risk factors have been studied. This study aimed to identify and compare such factors between urban and rural preschool children.

Methods: Case control studies were conducted in Yiwu urban and rural areas respectively in Zhejiang Province.

Environmental noise alters gastric myoelectrical activity: Effect of age.

Aim: To evaluate the effect of age and acoustic stress on gastric myoelectrical activity (GMA) and autonomic nervous system function.

Methods: Twenty-one male subjects (age range 22-71 years, mean 44 years) were recruited and exposed, in random order, to three auditory stimuli (Hospital noise, conversation babble and traffic noise) after a 20-min baseline. All periods lasted 20 min and were interspersed with a 10 min of recovery.

[Follow-up study for newborns and infants who failed hearing screening].

Objective: To study the audiological characteristics of newborns and infants who failed hearing screening.

Methods: One hundred and six infants failed hearing screening received follow-up study with routine audiological evaluations (auditory brainstem response, distortion product otoacoustic emission, tympanometry and visual reinforcement audiometry).

Results: Sixty-five infants (61.

Gastric electrical stimulation does not significantly affect canine gastric acid secretion and 24-hour gastric pH.

Gastric electrical stimulation (GES) was shown to improve symptoms in patients with gastroparesis. However, the underlying mechanisms remain unclear. This study assessed the influence of various patterns of GES on fasting and postprandial gastric acid secretion and 24-hr gastric pH.

Gastric electrical-stimulation effects on canine gastric emptying, food intake, and body weight.

Objective: It has been reported that electrical stimulation at the distal stomach can disrupt intrinsic gastric electrical activity and delay gastric emptying. Gastric dysrhythmia and impaired gastric emptying are associated with upper gastrointestinal symptoms and weight loss. The purpose of this study was to evaluate the effect of low-frequency/long-pulse gastric electrical stimulation (GES), at proximal and distal stomach, on canine gastric emptying, food intake, and body weight.