There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.

Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

I and i

다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

抗原变异可使得多种致病微生物易于逃避宿主免疫应答。表达在感染红细胞表面的恶性疟原虫红细胞表面蛋白1（PfPMP1）与感染红细胞、内皮细胞、树突状细胞以及胎盘的单个或多个受体作用，在黏附及免疫逃避中起关键的作用。每个单倍体基因组var基因家族编码约60种成员，通过启动转录不同的var基因变异体为抗原变异提供了分子基础。

疟原虫var基因转换速率变化导致抗原变异[英]／Paul H, Robert P, Christodoulou Z, et al//Proc Natl Acad Sci U S A

[신간의 별자리x] 우리/미술, 그리고 ‘슬픔의 박물관’

The chemistry of graphene oxide is discussed in this critical review Particular emphasis is directed toward the synthesis of graphene oxide, as well as its structure Graphene oxide as a substrate for a variety of chemical transformations, including its reduction to graphene-like materials, is also discussed This review will be of value to synthetic chemists interested in this emerging field of materials science, as well as those investigating applications of graphene who would find a more thorough treatment of the chemistry of graphene oxide useful in understanding the scope and limitations of current approaches which utilize this material (91 references)

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The chemistry of graphene oxide

In this study, novel humidity-responsive actuators are developed based on firm heterojunction of glycerol-cross-linked polyvinyl alcohol (Gly@PVA) and porous polyvinylidene fluoride (PVDF) via a facile strategy for achieving humidity control and anti-condensation functions. The firm heterojunction of Gly@PVA and PVDF with extremely high interfacial toughness is achieved by simply bonding the Gly@PVA layer and plasma-treated porous PVDF layer via a coating–freezing–drying process. The addition of glycerol in polyvinyl alcohol (PVA) increases the moisture adsorption capacity, resulting in a significant mismatch between the humidity-responsive properties of the humidity-active Gly@PVA and inert PVDF layers. With the mass ratio of glycerol to PVA as 17.5%, the Gly@PVA/PVDF bilayer actuators exhibit humidity-responsive bending behaviors with a bending angle change as large as 216.4° when the environmental relative humidity (RH) changes from 25 to 95%. Based on the humidity-responsive bending property, Gly@PVA/PVDF bilayer films are designed and patterned as humidity-responsive smart gates. By equipping sealed chambers and food crispers with such smart gates, which can rapidly open and release excessive moisture out in time when the inside RH exceeds a critical value, excellent performances of humidity control, anti-condensation, and food preservation are effectively achieved. The proposed strategy is highly promising for developing efficient humidity-responsive actuators for various applications. 

Humidity-Responsive Actuators Based on Firm Heterojunction of Glycerol-Cross-linked Polyvinyl Alcohol and Porous Polyvinylidene Fluoride as Smart Gates for Anti-condensation

Wound microenvironment with excess reactive oxygen species (ROS) can significantly inhibit wound healing. Encouraged by hydrogen molecules (H2) with effective ROS scavenging and calcium hydride (CaH2) with sufficient H2 supply, the authors for the first time employed CaH2 as a therapeutic H2 donor and starch as a diluent to construct CaH2 pulvis dressing for wound healing treatment. It has been found that CaH2 by generating H2 exhibited excellent ROS scavenging performance, favorable for preserving the oxidative‐stress‐induced cell death. After being applied onto the skin wound, the CaH2 pulvis dressing with the unique ROS‐scavenging ability can accelerate skin wound healing in healthy/diabetic mice (small animal models) and Bama mini‐pigs (large animal model). Such CaH2 dressing can release H2 to relieve the inflammation levels, decrease the secretion of pro‐inflammatory cytokines, increase the infiltration of inflammation‐suppressive immune cells, and promote the regeneration of new blood vessels and collagens, thereby accelerating wound healing. This work highlighted that the integration of anti‐oxidation and anti‐inflammation functions based on CaH2 dressing endowed it with a promising possibility for the treatment of inflammatory diseases.

Calcium Hydride‐Based Dressing to Promote Wound Healing

Nanoplatforms for Raman Molecular Imaging in Biological Systems

Objective: To investigate the occurrence and degree of radiation-induced injury in vagina after radical radiotherapy of cervical cancer. Methods: A total of 282 cases of patients with cervical cancer were collected from November 2016 to September 2017. All of the above patients underwent radical radiotherapy from 2008 to 2017 in the First Affiliated Hospital of Xi'an Jiaotong University. The patients' International Federation of Gynecology and Obstetrics (FIGO) staging (2009) , brachytherapy dose, whether receive synchronous chemotherapy or not, age and body mass index (BMI) for the occurrence and severity of vaginal radiation injury at different time periods were analyzed by cross-sectional survey method. The single factor would be analyzed by the method of Chi-square test and the multiple factors would be analyzed by logistic regression method to checkout. Results: Of the 282 patients, the incidence of radiation-injury in vaginal was 84.4% (238/282) , with the incidence rate of degree Ⅰ,Ⅱ and Ⅲ radiation injury were respectively 50.7% (143/282), 29.8% (84/282) and 3.9% (11/282; χ(2)=153.375, P 2- 2- 0.05) . The multifactor analysis indicated that the brachytherapy dose was an independent factor affecting the occurrence of vaginal radiation-induced injury (P=0.043) . Conclusion: After the radical radiotherapy of cervical cancer, the vaginal radiation-induced injury is associated with the dose of brachytherapy.

Zhuang Liu

Papers

Humidity-Responsive Actuators Based on Firm Heterojunction of Glycerol-Cross-linked Polyvinyl Alcohol and Porous Polyvinylidene Fluoride as Smart Gates for Anti-condensation

Calcium Hydride‐Based Dressing to Promote Wound Healing

Nanoplatforms for Raman Molecular Imaging in Biological Systems

[Occurrence of radiation-induced injury in vagina after radical radiotherapy of cervical cancer and its affecting factors].

Porous functional materials with excellent solar-thermal and electro-thermal properties for desalination of saline water