Crystal structure and the degradation products of Tenvermectin B.

The purpose of this work was to investigate the crystal structure and degradant products (DPs) of tenvermectin B (TVM B). A suitable crystal of TVM B was obtained from a solvent system (MeOH:formamide:HO = 2:5:2) and its absolute configuration was unambiguously established by single-crystal X-ray diffraction analysis. Meanwhile, a formamide-assisted crystallisation method for the purification of TVM B was developed.

Gender differences in the relationships between housework and metabolic markers: a longitudinal cohort study in China.

Background: Metabolic syndrome has become a major health threat throughout the world, but there are few studies that focus on the effects of housework on human metabolism. This study explores the association between housework and metabolic markers and examines whether there are gender differences in the relationship of housework intensity on these markers.

Methods: We obtained data for 2,624 participants from the China Health and Nutrition Survey and used binary logistic regression to analyze the association between housework and metabolic markers (triglycerides, high- and low-density lipoprotein cholesterol, hemoglobin, blood glucose, cholesterol, and blood pressure).

Predictive factors for successful sperm retrieval by microdissection testicular sperm extraction in men with nonobstructive azoospermia and a history of cryptorchidism.

This study aims to explore the factors influencing the success rate of the microdissection testicular sperm extraction (Micro-TESE) in patients with nonobstructive azoospermia (NOA) and cryptorchidism. Clinical data of 162 patients with cryptorchidism who underwent Micro-TESE due to infertility from December 2015 to May 2020 in the First Affiliated Hospital of Nanjing Medical University were analyzed retrospectively. In the univariate analysis, significant differences in the age of patient at the time of orchidopexy (median [interquartile range, IQR]: 7.

Association between gene rs907715 polymorphism and gastric precancerous lesions in a Chinese population.

Background: The single nucleotide polymorphisms of interleukin-21 () gene were confirmed to be related to various diseases, but no studies have examined the possible role of single nucleotide polymorphisms (SNPs) (rs907715, rs2221903, and rs12508721) in gastric precancerous lesions.

Aim: To explore the associations between SNPs of gene (rs907715, rs2221903, and rs12508721) and gastric precancerous lesions in a Chinese population.

Methods: Three SNPs of were genotyped using polymerase chain reaction-ligase detection reaction in 588 cases and 290 healthy controls from May 2013 to December 2016 in northwestern China.