Dydrogesterone alleviates periodontitis in perimenopausal women undergoing periodontal therapy by decreasing inflammation and mediating oral microbiota.

Objective: Dydrogesterone (DG), a synthetic isomer of progesterone, plays a potential regulatory role in the periodontal environment. The aim of this study was to investigate the potential effects of DG on periodontitis under periodontal therapy (PT) and the underlying mechanisms related to oral microbiota.

Methods: As a cohort study, perimenopausal women with periodontitis and abnormal uterine bleeding associated with ovulatory dysfunction were screened.

The "double-edged" role of progesterone in periodontitis among perimenopausal women undergoing or not undergoing scaling and root planing.

Objective: Progesterone (PG) is an important sex steroid hormone commonly administered to protect the endometrium in perimenopausal women. The present study aimed to explore differential responses of periodontitis to PG in perimenopausal women who did or did not undergo scaling and root planing (SRP).

Methods: A total of 129 perimenopausal women with mild-to-moderate periodontitis were enrolled and underwent treatment as follows: SRP (n = 35); SRP + PG (n = 34); PG (n = 31); and no treatment (s) (n = 29).

Reutilizing Waste Iron Tailing Powders as Filler in Mortar to Realize Cement Reduction and Strength Enhancement.

Recently, the massive accumulation of waste iron tailings powder (WITP) has resulted in significant environmental pollution. To solve this problem, this paper proposes an original mortar replacement (M) method to reuse waste solids and reduce cement consumption. In the experiment, the author employed an M method which replaces water, cement, and sand with WITP under constant water/cement and found that the strength development can be significantly improved.

Preparation and release kinetics of nitrendipine-loaded PLLA-PEG-PLLA microparticles by supercritical solution impregnation process.

In this work, drug-loaded polymer microparticles were prepared by a supercritical solution impregnation (SSI) process with nitrendipine as the model drug and PLLA-PEG-PLLA as the drug carrier. The morphology, size, distribution and functional groups of the drug-loaded microparticles were characterized by scanning electron microscopy (SEM), laser particle size analyzer and fourier transform infrared analysis (FTIR). The effects of pressure, temperature and cosolvent concentration on the drug loading and release property of the microparticles prepared with and without cosolvent were investigated.

[Preliminary survey on the host of Angiostrongylus cantonensis in three plateau lakes of Yunnan Province].

Objective: To investigated the intermediate hosts of Angiostrongylus cantonensis in three plateau lakes of Yunnan Province, and analyze the effect of temperature on A. cantonensis during 1991-2010.

Methods: An epidemiological investigation of angiostrongyliasis cantonensis in Erhai Lake, Fuxian Lake and Xingyun Lake was conducted from April to September in 2012.

[Application of PCR and PCR-derived technologies in the detection of Angiostrongylus cantonensis].

Angiostrongyliasis is a zoonotic disease and has become one of the potentially threatening food-borne parasitic infections in China. This article reviews the advances in the application of PCR and PCR-derived techniques in detection of Angiostrongylus cantonensis.

[Application of immune colloidal gold technique on the diagnosis of parasitoses].

Immune colloidal gold (ICG) technique is a simple, rapid, accurate diagnosis method. At present, ICG technique has been widely applied in the accessory diagnosis of parasitoses, and this article reviews the latest progress of ICG technique applied in parasitology.