Study on the Lactation Volume and Related Factors of Mother’s Milk in Puerperal Women Separated from Infant

Objective: To investigate the lactation volume and milk secretion of mother’s milk in puerperal women separated from mother and infant, and to study the related influencing factors. Methods: Selected February 2015-February 2020 in Foshan women and children’s hospital 420 cases of maternal as the research object, using lactation related factors comprehensive questionnaire of maternal and infant separation of puerperal women for continuous determination of amount of lactation, and 1 - 7 days and 8 to 14 days postpartum lactation quantity and Pearson correlation analysis, using multiple linear regression analysis to affect maternal separation of puerperal women in lactation of breast volume related factors were analyzed. Results: The lactation volume of the puerperal women was on the rise within 14 days after delivery. 14 days mammary volume ware 545.13 - 243.18 ml, postpartum lactation II period start time was (67.48 + 26.57) h. The correlation coefficient between lactation volume on day 4 and lactation volume on day 14 was 0.04 (P < 0.05). Pregnancy-induced hypertension syndrome, lactation II period start time, birth gestational age, maternal age is affecting maternal separation of the main factors of puerperal women lactation milk. Conclusion: Early maternal separation of puerperal women breast milk lactation quantity is little, lactation II later period start time, delay rate is high: in clinical nursing work, should pay attention to produce age is bigger, smaller gestational age and birth with pregnancy-induced hypertension syndrome, maternal lactation stage II startup delay, should be timely intervention of maternal and infant separation maternal management effectively, promote successful lactation and increase the amount of lactation, for clinical guidance and provides some references for the separation of puerperal women breastfeeding.

High-Entropy Spinel Oxide Nanofibers as Catalytic Sulfur Hosts Promise the High Gravimetric and Volumetric Capacities for Lithium–Sulfur Batteries

The exploration of new catalytic hosts is highly important to tackle the sluggish electrochemical kinetics of sulfur redox for achieving high energy density of lithium–sulfur batteries.Herein,for the first time,we present high-entropy oxide(HEO,(Mg_(0.2)Mn_(0.2)Ni_(0.2)Co_(0.2)Zn_(0.2))Fe_(2)O_(4))nanofibers as catalytic host of sulfur.The HEO nanofibers show a synergistic effect among multiple metal cations in spinel structure that enables strong chemical confinement of soluble polysulfides and fast kinetics for polysulfide conversion.Consequently,the S/HEO composite displays the high gravimetric capacity of 1368.7 mAh g^(−1) at 0.1 C rate,excellent rate capability with the discharge capacity of 632.1 mAh g^(−1) at 5 C rate,and desirable cycle stability.Furthermore,the S/HEO composite shows desirable sulfur utilization and good cycle stability under a harsh operating condition of high sulfur loading(4.6 mg cm^(−2))or low electrolyte/sulfur ratio(5μL mg^(−1)).More impressively,the high volumetric capacity of 2627.9 mAh cm^(−3) is achieved simultaneously for the S/HEO composite due to the high tap density of 1.92 g cm^(−3),nearly 2.5 times of the conventional sulfur/carbon composite.Therefore,based on high-entropy oxide materials,this work affords a fresh concept of elevating the gravimetric/volumetric capacities of sulfur cathodes for lithium–sulfur batteries.