Histologic and histochemical studies were made upon the collagen and ground substance of the callus and diaphyseal bone at the fracture site in the tibia of rabbits. The main findings were as follows: 1. It was found that the acid mucopolysaccharides were most abundant in the cartilagenous callus, moderate in the newly formed bone trabeculae (fiber bone) and very scanty in the diaphyseal bone and the compact bone after remodelling of the fiber bone, being found only in the wall of lacunae, around the Haversian canals and at the cement lines. 2. In the ground substance of newly formed bone callus and cartilagenous callus, a PAS positive substance was found. The PAS reaction did not run parallelly with the positive reactions for acid mucopolysaccharides in these calluses. It was assumed that there was another mucopolysaccharide present, probably a neutral mucopolysaccharide. 3. During the process of remodelling of fiber bone callus into compact bone, the collagen, acid mucopolysaccharides and PAS positive substance were closely bound together, as evidenced by the disappearance of the positive staining reactions previously found in these components. 4. The matrix of the necrotic ends of the bone fragments and pieces of necrotic bone between the fracture ends were often enveloped and actually invaded by the newly formed bone. Beside osteoclastic activity, this may be a was one way of removal of the necrotic bone. The mechanism needs further clarification.

Histopathological examination of testes is important in assessing spermatogenesis and testicular function. Modified Davidson's fluid (mDF) has been proposed as a superior substitute for Bouin's fluid (BF) for fixation of adult animal testes. Besides, 4% paraformaldehyde (PFA) has been commonly used to fix testes with convenience. We compared the morphology of the rat testis fixed in 4% PFA, mDF, or BF using hematoxylin and eosin (HE)-stained sections. Fixation in 4% PFA resulted in obvious tissue shrinkage artifacts, especially between seminiferous epithelium cells. Shrinkage artifacts were also observed in the central area of the testes fixed in BF. Use of mDF did not cause shrinkage artifacts between seminiferous tubules, though a small amount can be observed in seminiferous tubules between germ cells. Clarity of nuclear detail in testes fixed in mDF and BF is better compared to 4% PFA. Our study demonstrated that fixation in mDF provided better morphologic details in the rat testis as compared with 4% PFA and BF.

OBJECTIVE To investigate the incidence of the cricopharyngeal bar in Chinese patients with dysphagia. METHODS One hundred and forty-six patients with dysphagia undertook a barium swallow radiological examination. Three patients with cricopharyngeal bar were further examined with esophagoscopy. RESULTS The incidence of cricopharyngeal bar was 14.4 %(21 out of 146). There is no significant difference between age groups, e.g. 14.3 % in elderly group and 13.8 % in adult group. CONCLUSION Some patients with dysphagia is associated with the appearance of the cricopharyngeal bar.

Objective:To investigatethe maternal and infant adverse outcomes of group B streptococcus (GBS) colonization during the late pregnancy.Methods:A total of 567 pregnant women who underwent obstetrics and gynecology examination in Yuyao People′s Hospital from December 2018 to June 2019 were selected for the study. Internal vaginal secretions of all the pregnant women were extracted from the lower 1/3 of the vagina for bacterial culture, and GBS culture and screening were performed on pregnant women. According to the results of GBS screening, pregnant women were divided into GBS negative group (8 cases) and GBS positive group (559 cases). The general condition and pregnancy outcomes of pregnant women were compared between the two groups, and the correlation between pregnancy outcomes and streptococcus colonization was analyzed.Results:There were no statistically significant differences in age, gestational weeks, number of births, number of pregnancies, history of abortion, residence area and ethnicity between the two groups ( P>0.05). The incidence of premature rupture of membranes and fetal distress in GBS positive group were higher than those in GBS negative group:5/8 vs. 7.69%(43/559), 3/8 vs. 5.01%(28/559), and the differences were statistically significant ( P<0.05). Spearman single factor correlation analysis showed that GBS colonization in pregnant women were positively correlated with premature rupture of membranes and fetal distress ( r = 0.632, 0.573, P<0.05). Conclusions:GBS colonization in late pregnancy is closely related to pregnancy outcomes, and strengthening GBS screening has great significance to reduce adverse pregnancy outcomes.

Objective To observe the Klotho expression in kidneys and renal tubular epithelial cells apoptosis in spontaneously hypertensive rats (SHRs) and the effects of cordyceps sinensis (CS), in order to study the mechanism of protective effects of CS on renal tubular cells apoptosis in hypertensive renal damage. Methods Twenty 22-week-old male SHRs were control group. After 8 weeks, the levels of 24 hours urinary protein (Upre), urinary N-acetyl-β-D-glucosaminidase (NAG), serum creatinine (Scr), blood urea nitrogen (BUN) and renal pathological changes were detected; the mRNA expression of Klotho, 053 and 021 was detected by RT-PCR; the protein expression of Klotho, 053, 021 and cleaved-caspase-3 was tested by Western blotting. TUNEL assay was applied to evaluate the renal tubular cell apoptosis. Results As compared to SHR group, the levels of 24 h urinary protein content [(52.16±29.3) mg, (49.97±32.5) mg, (54.67±30.09) mg vs (96.52±36.94) mg], urinary NAG [(44.13±9.11), (42.75±8.33), (41.96±7.88) U/L vs (54.07±6.57) U/L], Sct [(45.25±9.55), (43.76±8.65), (45.18±7.28) μmol/L vs (53.84±10.21) μmol/L]and BUN [(8.25±1.03), (8.40±1.58), (8.32±0.98) mmol/L vs (8.91±1.24) mmol/L]were decreased (all P<0.05), renal pathological changes were relieved, the levels of Klotho expression were up-regulated and the levels of p53 and p21 expression and cleaved-caspase-3 protein expression were down-regulated (all P<0.01), tubular cell apoptosis was decreased [7.56%±0.52%, 7.93%±0.37%, 7.37%±0.36% vs 13.32%±0.64%, P<0.01] in CS, Los and CS+Los group. Conclusions Klotho, p53 and p21 play important roles in renal tubular cells apoptosis in hypertensive renal damage. CS can up-regulate Klotho expression, down-regulate p53 and p21 expression and decrease the cleaved-caspase-3 expression and tubular cell apoptosis to ameliorate the hypertensive renal damage.

Objective To investigate the effects of radiosensitivity enhancement and inhibition of migration ability of human lung adenocarcinoma cells by celecoxib,a selective cyclooxygenase (COX)-2 inhibitor.Methods Human lung adenocarcinoma cells of the line A549 were cultured and then inoculated into six-well plates and randomly divided into 4 groups:control group,celecoxib group administered with celecoxib at the subtoxic doses 30 and 50 μmol/L,irradiated group exposed to 0,1,2,4,6,or 8 Gy by linear accelerator,and combined treatment (celecoxib + irradiation) group.The radiosensitizing effect of celecoxib was assessed by clonogenic cell survival test.The migration ability of the A549 cells was measured by scratch-wound test and the content of metalloproteinase-2 (MMP-2) in culture supernatant was detected with ELISA.Results The sensitization enhancement ratio of the celexib group was increased dosedependently.The values of D0 ,Dq,SF2 and D0.01 of the celecoxib + irradiation group were all significantly lower than those of the irradiated group.Scratch-wound test showed that the no-scratch area of the celecoxib + irradiation group and celecoxib group were all significantly wider than those of the mere irradiation and control groups and there was a dose-dependent manner,and the no-scratch area of the celecoxib + irradiation group was wlider than that of the celecoxib group.ELISA showed that the MMP-2 levels in the supernatant of the celecoxib group and celecoxib + irradiation group were respectively significantly lower than those of the control group and mere irradiated group (t = 3.78,5.79、3.15,P ＜ 0.05),however,there was not significant difference between the mere irradiation and control groups (t = 2.73,2.38,P ＞ 0.05).Conclusions Celecoxib enhances concentration-dependently the radiosensitivity of human lung carcinoma cell and inhibits the secretion of MMP-2 of the carcinoma cells,thus inhibiting their migration ability.

Objective To know the stability of 3 kinds of traditional Chinese drug injection with different solvent under different temperature and different storage time,and then reference to safty of clinical durgs. Methods Use particle analyzer,UV SpectropHotometer,pH Determination of three traditional Chinese medicine injection,at different temperatures and different times,the nuanber of particles,pH value,the value of UV absorbance Observe changes. Results The records of experimental data by repeated measures analysis of statistics: Ciwujia Injection,Aidi injection combined with normal saline solution after the particles of ≥ 10μm excess pharmacopoeia standards; ≥ 2μm number of particles is considerable,in the 32～35℃,Ciwujia at T=O min Aidi at T=I80 min ,the number of particles are smaller and with statistical significance,its pH value of the standard range. Xuesaitong injection with glucose injection ≥ 10μm particulate mixture at a higher temperature in excess of pH annacopoeia standards,number of ≥ 2 μm particles in the 4～8℃ and 20～23℃,T=30 min and 60 min time less with statistical significance,and its range of pH value less than pHarmacopoeia. Three kinds of Chinese medicine in the Department's largest UV absorbance peak value and appearance almost unchanged. Conclusions Different drugs in their relative Suggestions of temperature,time and place under intravenous drug use,or better terminal filter,in order to improve the safety of clinical medication.

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Objective To investigate the dynamic changes of the contents of brain water and Ca,Fe,Cu,Zn,Mg and microvascular damage in hippocampal tissue of radiation-injured rat brain.Methods The rats were randomly divided into control group,protective group (with intraperitoneal injection of 10％ MgSO4,400 mg/kg body weight + a single dose of 20 Gy electron beam irradiation in whole brain) and irradiation alone group (with intraperitoneal injection of normal saline,400 mg/kg body weight + a single dose of 20 Gy electron beam irradiation to the entire brain) with 18 rats assigned to each group and 3 rats sampled at each time point.Radiation-induced brain injury (RBI) was modeled by irradiating the rat' s whole brain with 5 MeV electrons.A dry-wet weight method was used to detect brain water content (BWC),and the level of microvascular damage was detected with HE staining of brain tissue slices,and the contents of Ca,Fe,Cu,Zn,Mg in hippocampus were detected with inductively coupled plasma atomic emission spectroscopy at different time points after radiation.Results BWC in the irradiated rats at 7,14 and 30 d post-irradiation was higher than that of control group (t =3.21,-2.11,2.82,P ＜0.05),andBWC in the protective group was less than that in the irradiated group (t =2.84,4.33,1.90,P ＜ 0.05).Microvascular thrombosis was induced in the radiated brain but this thrombosis was reduced by MgSO4.Thecontents of Ca and Fe in the brain tissue after 1,3,7 d of irradiation was higher than that of control group(t =11.41,6.81,14.03,17.17,6.89,9.12 and 5.43,5.66,3.60,P ＜ 0.05),and the content of Cain the protective group at various time post-irradiation was less than that in the irradiated group (t =5.35,5.28,11.02,14.26,5.68,9.10,P ＜0.05).The content of Cu (1,7,14,60 d post-irradiation) andZn (1,7,14,30,60 d post-irradiation) of the irradiated group was less than that of the control group(t =4.24,3.76,4.76,3.86 and 5.25,4.78,26.53,6.67,11.37,P ＜ 0.05),and the content of Cuin the protective group at different time points post-irradiation was less than that of the irradiated alonegroup (t =4.23,3.57,4.01,4.73,3.78,3.44,P ＜0.05),the content of Zn in the protective group(14 d post-irradiation) was higher than that of the irradiated group (t =6.21,P ＜ 0.05).The content ofMg in the irradiated group (7 d post-irradiation) was less than that of the control group (t =5.85,P ＜0.05).Conclusions The contents of Ca,Fe,Cu and Zn were imbalanced in the radiation-injured ratbrain,and the supplement of MgSO4could recover the balance of Ca,Fe,Cu and Zn content and alleviateradiation-induced brain injury.

ObjectiveThe purpose of the study was to observe and analysis the actual dosage of patients with breast cancer using metal oxide semiconductor field effect transistor (MOSFET) detector.MethodsFirst, Phantom measurements were performed to investigate dose distribution in the area of the junction in a half-field matching method and the influence of factors related to the accelerator. In vivo dose measurements were performed for patients with breast cancer to investigate the skin dose and the junction of supraclavicular-axillary field and tangential field in 6 MV X-ray beams. ResultsPhantom measurements showed that the relative deviation in the junction were within + 3％, and the dose distributions in the junction area depended on the matching field direction (x or y). In vivo measurement of tangential region for patients showed that, the maximum dose deviation between measurement and calculation was -30. 39％,the minimum deviation was - 18. 85％, the average dose deviation was -24. 76％. The dose deviation of tangential fields for patients with breast-conserving surgery was larger than that patients with radical surgery (t =2. 40 ,P＜0. 05), while dose deviation of supraclavicular-axillary fields was not significantly different. The average values of 15 fraction in the junction area showed more stable than one individual measurement.ConclusionsIt is important to real-time, in vivo measurement of radiation dose during radiotherapy in patients with breast cancer, and change treatment plan in time, to ensure the accuracy of target dose.