ANNIHILATION OF VERTICAL-BLOCH-LINE CHAINS IN THE WALLS OF ORDINARY HARD BUBBLES SUBJECTED TO JOINT STATIC BIAS FIELD AND IN-PLANE FIELD

For the ordinary hard bubbles(OHBs) of garnet bubble films, the annihilation of the vertical-Bloch line (VBL) chains in their walls subjected to joint static bias field H_b and in plane field H_ip was experimentally studied. The curves of two critical in-plane fields, H⁽¹⁾_ip and H′_ip, vs H_b were measured. By means of the so-called "head-cut" and "tail-cut" experiments designed in this work, it was verified that for the OHBs subjected to H_ip, their VBL chains with different lengths lose VBLs and become shorter simultaneously. It was also verified that the critical in-plane fields H⁽¹⁾_ipand H′_ip correspond to the break down of the shortest and longest VBL chains of OHBs, respectively.     

STABILITY OF SECOND KIND OF DUMBBELL DOMAINS SUBJECTED TO AN IN-PLANE FIELD AT DIFFERENT BIAS FIELDS

The softening process of the second kind of dumbbell domalns(liDs) in garnet bubble films subjected to an in-plane field H_ip at different static bias field H_b was studied experimentally. It was found that when H_b is larger, the remaining percentage of IID, R_IID, drops sharply at a certain H_ip, and with the increase of H_b the drop occurs at lower H_ip and becomes more intensive. We have confirmed that this is related to the "spontaneous-shrink" 0f IIDs, which plays an important role for the breakdown oF vertical Bloeh line chains of lids subjected to joint fields H_ip and H_b .     

玉米苞叶对水和红酒中苏丹红染料的薄膜微萃取法

农业废弃物玉米苞叶组织构造紧密,柔韧性好,表面含有丰富的含氧基团活性吸附位点。本文以玉米苞叶作为萃取相,建立了薄膜微萃取-高效液相色谱法(TFME-HPLC)分析水样和红酒中的苏丹红I和苏丹红Ⅱ。优化了影响萃取效率的主要因素。在优化的实验条件下,苏丹红I和苏丹红Ⅱ分别在20～500μg·L~(-1)范围内呈现良好的线性关系,相关系数均大于0.9980,检出限分别为1.9μg·L~(-1)和1.3μg·L~(-1)。该方法应用于水和红酒样品苏丹红染料的分析,回收率在84.61%～102.48%之间。结果表明,该TFME方法简单、绿色,适用于水样和红酒中苏丹红Ⅰ和苏丹红Ⅱ的检测分析。     

直流偏场和面内场联合作用下第二类哑铃畴的自发收缩

实验研究了第二类哑铃畴在直流偏场和面内场联合作用下的自发收缩现象，发现第二类哑铃畴的自发收缩不仅与面内场的大小有关，而且还与第二类哑铃畴在面内场中所处方向有关.采用照相法形象地揭示出：当第二类哑铃畴与面内场垂直时最容易发生自发收缩；当第二类哑铃畴与面内场平行时最难发生自发收缩.实验还证明了第二类哑铃畴在自发收缩过程中存在垂直布洛赫线的丢失现象.     

ANNIHILATION OF VERTICAL-BLOCH-LINE CHAINS IN THE WALLS OF THE SECOND KIND OF DUMBBELL DOMAINS SUBJECTED TO JOINT STATIC BIAS FIELD AND IN-PLANE FIELD

Experiments were statistically carried out on the behavior of vertical-Bloch-line(VBL) chains in the walls of the second kind of dumbbell domains (IIDs) is garnet bubble films subjected to joint action of static bias field H_b and in-plane field H_ip. The curves of the four critical in-plane fields, (H_ip)_IID-ID (H_ip)_IID-OHB (H_ip)_IID-SB and H'_ip vs H_b were measured and explained. In particular, in terms of two series of IID photos, a new experimental manifestation of the unknown "number effect" of VBL chains was found.     

直流偏场和面内场联合应用下第二类哑铃畴的自发收缩

实验研究了第二类哑铃畴在直流偏场和面内场联合应用下的自发收缩现象，发现第二类哑铃畴的自发收缩不仅与面内场的大小有关，而且不与第二类哑铃畴在面内场中所处方向有关。采用照相法形象地揭示出：当第二类哑铃畴与面内场垂直时最容易发生自发收缩；当第二类哑铃畴与面内场平行时最难发生自发收缩。