一种用魔芋精粉制取可溶性膳食纤维的方法

本发明公开了一种用魔芋精粉制取可溶性膳食纤维的方法，用含β-1，4葡聚糖内切酶的酶制剂来降解葡甘聚糖，由于魔芋葡甘聚糖中葡萄糖与甘露糖的摩尔比为1∶1.6，即以甘露糖为主，而β一1，4葡聚糖内切酶仅作用于葡：葡β-1，4糖苷键，而不作用于葡：甘连键或甘：甘连链。再通过对酶的加量以及作用条件的控制，使得这种酶解过程只能是一种很有限的降解，即掌握酶解程度使得所需的成份为一种粘度小、溶解性能好，但仍保持其凝胶特性的产物

玉竹低聚糖硫酸酯的制备方法和用途

本发明涉及天然物质的提取及其衍生物的制备和应用。通过以玉竹根状茎干粉为原料，先采用高浓度乙醇回流，过滤，滤渣用一定体积和浓度的乙醇浸提，过滤收集滤液，再用高浓度乙醇沉淀，沉淀用无水乙醇、丙酮、乙醚脱水，烘干即得玉竹低聚糖，再通过氯磺酸-吡啶法进行硫酸酯衍生修饰获得玉竹低聚糖的硫酸酯衍生物，该衍生物可应用于抗病毒药物

黄精多糖的抗单纯疱疹病毒作用

体外抗单纯疱疹病毒试验表明 :黄精多糖对非洲绿猴肾细胞 (Verocell)的最大无毒浓度为 16mg/mL .在对Vero细胞无毒性的浓度下对单纯疱疹病毒 1型 (Stoker株 )和 2型 (333株和Sav株 )均有显著的抑制作用 .对Stoker株的半抑制浓度 (IC50 )为 3 .95mg/mL ,最小有效浓度 (MIC)为 1.0mg/mL ;对 333株的IC50 为 8.0mg/mL ,MIC为 8.0mg/mL ;对Sav株的IC50 为 7.72mg/mL ,MIC为 4mg/mL .MTT染色的结果表明 ,黄精多糖能显著提高病毒感染的Vero细胞的活力 ,对细胞有保护作用 .图 1表 4参 1

黄精果聚糖同系混合物药物

本发明属于以中草药黄精为原料的天然药物，该药物是由葡萄糖残基和果糖残基这两种单糖残基组成的果聚糖的同系混合物。可作为治疗疱疹，流感，肝炎及爱滋病的药物，是一种高效低毒的天然抗病毒药物或先导化合物

基于聚类分析中国林蛙皮不同时期多不饱和脂肪酸含量变化规律

建立气相色谱方法测定同年9个不同生长期中国林蛙皮肤中花生四烯酸(AA)、二十碳五烯酸(EPA)和二十二碳六烯酸(DHA)含量,比较分析其含量差异。采用SPSS 19.0软件对各时期多不饱和脂肪酸(PUFA)含量进行聚类分析,探讨其变化规律,结果表明:9个时期中国林蛙皮肤中PUFA含量可聚为4大类,第一类为时期2018-09-21,第二类为时期2018-09-05,第三类为时期2018-01-08日和2018-04-26,第四类为时期2018-03-08、2018-03-19、2018-04-09、2018-10-18和2018-11-27,即中国林蛙全年不同生长时期皮肤中PUFA含量存在差异,在其深居冬眠期和上岸后捕食生长期时皮肤中PUFA含量总体较高。本文从中国林蛙全年各生长发育时期考察其皮肤组织营养物质含量差异,为进一步利用林蛙皮资源提供有力依据,对改善中国林蛙的养殖条件以及林蛙皮品质最佳期的确定具有重要的指导意义

Amplitude analysis of the decays D0 → π+π−π+π− and D0 → π+π−π0π0*

Using e+e− annihilation data corresponding to an integrated luminosity of 2.93 fb−1 taken at the center-of-mass energy √s = 3.773 GeV with the BESIII detector, a joint amplitude analysis is performed on the decays D0 → π+π−π+π− and D0 → π+π−π0π0 (non-η). The fit fractions of individual components are obtained, and large interferences among the dominant components of the decays D0 → a1(1260)π, D0 → π(1300)π, D0 → ρ(770)ρ(770), and D0 → 2(ππ)S are observed in both channels. With the obtained amplitude model, the CP-even fractions of D0 → π+π−π+π− and D0 → π+π−π0π0 (non-η) are determined to be (75.2 ± 1.1stat. ± 1.5syst.) % and (68.9 ± 1.5stat. ± 2.4syst.)%, respectively. The branching fractions of D0 → π+π−π+π− and D0 → π+π−π0π0 (non-η) are measured to be (0.688 ± 0.010stat. ± 0.010syst.)% and (0.951 ± 0.025stat. ± 0.021syst.)%, respectively. The amplitude analysis provides an important model for the binning strategy in measuring the strong phase parameters of D0 → 4π when used to determine the CKM angle γ(φ3) via the B− → DK− decay

Measurement of integrated luminosity of data collected at 3.773 GeV by BESIII from 2021 to 2024

We present a measurement of the integrated luminosity e+e- of collision data collected by the BESIII detector at the BEPCII collider at a center-of-mass energy of Ecm = 3.773 GeV. The integrated luminosities of the datasets taken from December 2021 to June 2022, from November 2022 to June 2023, and from October 2023 to February 2024 were determined to be 4.995±0.019 fb-1, 8.157±0.031 fb-1, and 4.191±0.016 fb-1, respectively, by analyzing large angle Bhabha scattering events. The uncertainties are dominated by systematic effects, and the statistical uncertainties are negligible. Our results provide essential input for future analyses and precision measurements