Design of inductive electrostatic boom spray system based on embedded closed electrode structure and droplet distribution test in soybean field.

The large water demand, insufficient deposition on the back of the leaf and the uneven distribution of droplets are the problems of traditional agricultural ground plant protection machinery, which leads to low agricultural control efficiency. Combined with the advantages of electrostatic spray technology and the characteristics of high working efficiency and low probability of droplets drift of ground sprayer, an inductive electrostatic boom spray system based on embedded electrode structure is designed and mounted on a large self-propelled boom sprayer for field testing. Based on the working characteristics of the fan nozzle and the analysis of the theory of charge, the inductive electrostatic spray device is designed.

Dynamics and ecological reassembly of the human gut microbiome and the host metabolome in response to prolonged fasting.

Introduction: Prolonged fasting is an intervention approach with potential benefits for individuals with obesity or metabolic disorders. Changes in gut microbiota during and after fasting may also have significant effects on the human body.

Methods: Here we conducted a 7-days medically supervised water-only fasting for 46 obese volunteers and characterized their gut microbiota based on whole-metagenome sequencing of feces at five timepoints.

Corrigendum: Bio-high entropy alloys: Progress, challenges, and opportunities.

[This corrects the article DOI: 10.3389/fbioe.2022.

Bio-high entropy alloys: Progress, challenges, and opportunities.

With the continuous progress and development in biomedicine, metallic biomedical materials have attracted significant attention from researchers. Due to the low compatibility of traditional metal implant materials with the human body, it is urgent to develop new biomaterials with excellent mechanical properties and appropriate biocompatibility to solve the adverse reactions caused by long-term implantation. High entropy alloys (HEAs) are nearly equimolar alloys of five or more elements, with huge compositional design space and excellent mechanical properties.

Medical high-entropy alloy: Outstanding mechanical properties and superb biological compatibility.

Medical metal implants are required to have excellent mechanical properties and high biocompatibility to handle the complex human environment, which is a challenge that has always existed for traditional medical metal materials. Compared to traditional medical alloys, high entropy alloys (HEAs) have a higher design freedom to allow them to carry more medical abilities to suit the human service environment, such as low elastic modulus, high biocompatible elements, potential shape memory capability. In recent years, many studies have pointed out that bio-HEAs, as an emerging medical alloy, has reached or even surpassed traditional medical alloys in various medical properties.

Computer vision-aided bioprinting for bone research.

Bioprinting is an emerging additive manufacturing technology that has enormous potential in bone implantation and repair. The insufficient accuracy of the shape of bioprinted parts is a primary clinical barrier that prevents widespread utilization of bioprinting, especially for bone design with high-resolution requirements. During the last five years, the use of computer vision for process control has been widely practiced in the manufacturing field.

Bathing and toileting difficulties of older adults in rural China: the role of environment.

Background: For older adults, difficulties in bathing and toileting are often the most prevalent in the index of Activities of daily living (ADL). This study aims to examine how environmental factors are associated with difficulty of bathing and toileting among older adults in rural China.

Method: The data are from the 2014 Thousand-Village Survey (TVS), a national survey of Chinese rural residents of old age.

Leisure Activity Engagement Among the Oldest Old in China, 1998-2018.

To examine the trends of leisure activity engagement among the oldest old in China for the past 2 decades. Our panel data came from the Chinese Longitudinal Healthy Longevity Survey, which systematically asked respondents about their current participation in leisure activities over a 20-year period. The final sample contained 66 789 interviews from 1998 to 2018.

Twelve-week study of moxa smoke: occupational exposure in female rats.

Objective: To assess the toxicity of moxa smoke in rats.

Methods: Forty-eight female Wister rats were randomly divided into 4 groups (n = 12/group) to simulate moxa smoke exposure in Chinese medicine clinics (CMCs): the control group, and three moxa-smoke exposed groups of PM10 mass concentrations 3-5, 7-9 and 27-30 mg/m3 , respectively. These concentrations were 1 × , 2-3 × , and 7-9 × fold the concentrations found in CMCs.

Mechanical Respond and Failure Mode of Large Size Honeycomb Sandwiched Composites under In-Plane Shear Load.

The present work focuses on the in-plane shear respond and failure mode of large size honeycomb sandwich composites which consist of plain weave carbon fabric laminate skins and aramid paper core. A special size specimen based on a typical element of aircraft fuselage was designed and manufactured. A modified in-plane shear test method and the corresponding fixture was developed.

Metabolite profiling of Huaiyang with different mowing crops.

The main purpose of our study was to identify and compare secondary metabolites due to different mowing in order to make better use of Huaiyang . The metabolite profiling of Huaiyang with two mowing crops was performed using a rapid resolution liquid chromatography system with quadrupole time-of-flight mass spectrometer (RRLC-QTOFMS) followed by multivariate statistical analyses. Principal Component Analysis (PCA) results showed a clear distinction between two mowing crops.

Repeated exposure to moxa-burning smoke: its acute and chronic toxicities in rats.

Objective: To assess toxicities of the air in Chinese medicine clinics polluted by moxa-burning smoke due to moxibustion-derived burning products (MBP).

Methods: Both acute and chronic toxicity studies were conducted. For the acute toxicity study, five groups of Wistar rats (n = 16/group, male: female = 1∶1) were exposed to five different concentrations (95%, 90%, 85%, 80% and 75%, respectively) of MBP for 2 h.

[Effects of Blood Activating Wind Dissipating Acupuncture on Blood Pressure of Prehypertension Patients].

Objective: To observe the effects of blood activating wind dissipating acupuncture (BAWDA) on blood pressure (BP) of prehypertension (PHT) patients.

Methods: Totally 60 PHT patients were assigned to the control group and the acupuncture group according to random digit table, 30 in each group. All patients were intervened by life style.

[Analysis and evaluation on the nutrition components of Huaiyang Medicago polymorpha with different mowing crops].

Objective: Analyze and evaluate systematically on the nutrient component variations of Huaiyang Medicago polymorpha cultivated in autumn greenhouse with different mowing crops.

Methods: Cultivated all the Medicago polymorpha grops in six greenhouses in November 2013, mowed totally six times with every 30 days, finally collected all the mature part of the whole grass on the ground (seeds before and after threshing) and straws which amount to nine crops. After vacuum dried at low temperature then grinded into superfine powder.

The effect of procyanidin on expression of STAT1 in type 2 diabetes mellitus SD rats with focal cerebral ischemia.

Objectives: Diabetes with cerebral infarction is a common disease that severely impacts health. This study investigated the effect of procyanidin (PC) on the expression of signal transducers and activators of transcription (STAT1) in type 2 diabetes mellitus SD rats with focal cerebral ischemia. We then explored the protective mechanisms of PC in type 2 diabetes mellitus SD rats with focal cerebral ischemia, to provide theory evidence for its clinical application.