The viability and life span of pollen were evaluated by TTC (2,3,5-triphenyl tetrazlium chloride) and the peroxidase solution, the stigma receptivity were estimated by benzidine-H2O2 method and the fruiting characteristics were investigated. The results showed that (1) Anoectochilus roxburghii and A. formosanus appeared the same up-and-down trend of the pollen viability, increased and then decreased. The storage temperature and storage time had significant impact on the pollen viability. With the extension of storage time, the pollen activity decreased. 4 degrees C refrigerator storage may be extended the pollen vitality. (2) The stigma had receptivity in 1st day and reached the highest level in the 4th day after blooming. A. roxburghii lost receptivity in the 8th day while A. formosanus lost receptivity in the 10th day after blooming. (3) The different pollination had significant impact on seed setting rate. The seed setting rate of artificial cross-pollination was higher than that of the artificial self-pollination. Collecting pollen in the 3rd day and carrying out artificial cross-pollination in the 4th day after blooming can significantly improve seed setting rate. The results provided technical assurance for A. roxburghii and A. formosanus breeding of new varieties and seed breeding.
Cell Survival ; China ; Flowers ; physiology ; Fruit ; growth & development ; Orchidaceae ; growth & development ; physiology ; Pollen ; growth & development ; Reproduction ; Temperature

Child ; Humans ; Sleep Wake Disorders ; diagnosis ; etiology ; Tourette Syndrome ; complications

OBJECTIVETo explore the effects and action mechanism of electroacupuncture (EA) pretreatment on rats with transient cerebral ischemia/reperfusion.

METHODSA total of 144 healthy SD male rats were randomly divided into a sham operation group (group S), an ischemia/reperfusion group (group I/R) and an EA pretreatment group (group EA), 48 rats in each one. The model of cerebral ischemia/reperfusion was established by using 4-vessel occlusion method in the group I/R; after 5 min of cerebral ischemia, the reperfusion was performed. The group EA was treated with EA at "Dazhui" (GV 14) and "Baihui" (GV 20) 5 days before model establishment, 30 min per time, once a day. In group S, bilateral foramen alares were exposed without burning on the vertebral arteries, and bilateral common carotid arteries were unfolded and not occluded. The rats in the group I/R and group EA were sacrificed 6 h, 12 h, 24 h and 48 h after reperfusion and those in the group S were sacrificed at corresponding time to collect hippocampus example. The Western-blot method was used to measure the expression of glucose-regulated protein 78 (GRP 78), and HE staining method was used to count the number of surviving neurons, and TUNEL method was used to measure the number of apoptotic neurons.

RESULTSCompare with the group S, the number of surviving neurons in hippocampus was reduced at each reperfusion time point and the number of apoptotic neurons was increased (all P<0.05) in the group I/R and the group EA; the expression of GRP 78 at each reperfusion time point in group I/R and group EA was increased (P<0.05). Compared with the group I/R, the number of surviving neurons in hippocampus was increased at each reperfusion time point and the number of apoptotic neurons was reduced in the group EA (P<0.05); the expression of GRP 78 at each reperfusion time point was further increased (P<0.05).

CONCLUSIONThe electroacupuncture pretreatment has obvious cerebral protection on rats with ischemia/reperfusion, which is related with further increasing the expression of GRP 78 in ischemia area, leading to relieved endoplasmic reticulum stress.

Animals ; Brain Ischemia ; genetics ; metabolism ; surgery ; therapy ; Electroacupuncture ; Heat-Shock Proteins ; genetics ; metabolism ; Hippocampus ; metabolism ; Humans ; Male ; Rats ; Rats, Sprague-Dawley ; Reperfusion

Objective To study the expression of macrophage inflammatory protein 2(MIP-2) and the interfering effects of naloxone in the brain edema caused by lioposacchride (LPS)in rats.Methods Eithty-four SD rats were randomly divided into 3 groups:normal saline group(NS group,n=28) 0.2 mL normal saline was injected by carotid into each rat;LPS group(n=28) with 200 ?g LPS;naloxone interfering group(NAL group,n=28)1 mg/kg naloxone was intraperitoneally injected at 10 min,1,2,6,12 h and following LPS injected 2 h before decapitation.The content of MIP-2 and even blue(EB) in brain tissue were detected at different time point.The brain water content was measured by drying method.Results The content of water and EB in LPS group were significan higher than those in NS group(P

OBJECTIVE: To explore the relation between the behavior psychology analysis of partial mechanical injuries and the nature of death in high-falling cases, and provide reference, for such cases. METHODS: Of 311 death victims of high-falling injuries collected from 2008 to 2013, 205 cases were associated with partial mechanical injuries. The characteristics of injury formation, preliminary crime scene traces, fatal injury of high-falling, and text messages were all retrospectively analyzed. RESULTS: According to the investigation of preliminary crime scene traces, fatal injury of high-falling and text message, there were 86 suicide, 24 accident and 95 uncertainty in the 205 cases. According to the behavior psychology analysis of partial mechanical injuries, there were 80 suicide, 11 accident, and 4 homicide in the 95 uncertainty cases. CONCLUSION The partial mechanical injuries uncertainly caused by high-falling correlate with the manner of high-falling death. According to the behavior psychology analysis of the partial mechanical injuries in high-falling death cases, the presumption of high-falling death is usually accurate
Accidents/statistics & numerical data* ; Cause of Death ; Death ; Female ; Forensic Pathology ; Homicide/statistics & numerical data* ; Humans ; Male ; Retrospective Studies ; Suicide/statistics & numerical data* ; Uncertainty ; Wounds and Injuries/pathology*

DNA, Viral ; analysis ; False Positive Reactions ; Hepatitis B ; virology ; Hepatitis B virus ; genetics ; isolation & purification ; Humans ; Polymerase Chain Reaction ; methods ; standards ; Quality Control ; Reproducibility of Results ; Sensitivity and Specificity

OBJECTIVETo establish a model for one choosing controls with a suitable concentration for internal quality control (IQC) with qualitative ELISA detection, and a consecutive plotting method on Levey-Jennings control chart when reagent kit lot is changed.

METHODSFirst, a series of control serum with 0.2, 0.5, 1.0, 2.0 and 5.0ng/ml HBsAg respectively were assessed for within-run and between-run precision according to NCCLs EP5 document. Then, a linear regression equation (y=bx + a) with best correlation coefficient (r > 0.99) was established based on S/CO values of the series of control serum. Finally, one could choose controls with S/CO value calculated from the equation (y = bx + a) minus the product of the S/CO value multiplying three-fold between-run CV to be still more than 1.0 for IQC use. For consecutive plotting on Levey-Jennings control chart when ELISA kit lot was changed, the new lot kits were used to detect the same series of HBsAg control serum as above. Then, a new linear regression equation (y2 = b2x2 + a2) with best correlation coefficient was obtained. The old one (y1 =b1x1 + a1) could be obtained based on the mean values from above precision assessment. The S/CO value of a control serum detected by new lot kit could be changed to that detected by old kit lot based on the factor of y2/y1. Therefore, the plotting on primary Levey-Jennings control chart could be continued.

RESULTSThe within-run coefficient of variation CV of the ELISA method for control serum with 0.2, 0.5, 1.0, 2.0 and 5.0ng/ml HBsAg were 11.08%, 9.49%, 9.83%, 9.18% and 7.25%, respectively, and between-run CV were 13.25%, 14.03%, 15.11%, 13.29% and 9.92%. The linear regression equation with best correlation coefficient from a test at random was y = 3.509x + 0.180. The suitable concentration of control serum for IQC could be 0.5ng/ml or 1.0ng/ml. The linear regression equation from the old lot and other two new lots of the ELISA kits were y1 = 3.550(x1) + 0.226, y2 = 3.238(x2) +0.388, and y3 =3.428(x3) + 0.148, respectively. Then, the transferring factors of 0.960 (y2/y1) and 0.908 (y3/y1) were obtained.

CONCLUSIONThe results shows that the model established for IQC control serum concentration selecting and for consecutive plotting on control chart when the reagent lot is changed is effective and practical.

Enzyme-Linked Immunosorbent Assay ; methods ; standards ; Evaluation Studies as Topic ; Hepatitis B Surface Antigens ; blood ; Humans ; Quality Control ; Reagent Kits, Diagnostic ; standards ; Reproducibility of Results

Objective:To investigate the use of intravenous infusion in the rehabilitation of stroke survivors so as to further standardize and reduce the rate of use.Methods:Stroke survivors hospitalized in rehabilitation departments in Shandong Province in the first 5 months of 2021 were the study′s subjects. Data on the use of intravenous infusion were compiled including the medicine administered, the reason for the infusion, as well as the duration and the number of days of infusion. The rehabilitative effect, stroke complications and hospitalization costs were recorded, as well as the attitude toward the use of infusion and any measures taken to reduce their use.Results:The utilization rate of intravenous infusion was 31.72%. The drugs infused were mainly to improve circulation and feed the nerves. Short-term infusion had no adverse effects on functional recovery, but long-term infusion had negative effects and led to complications. The average daily cost of stroke survivors receiving intravenous infusion was significantly lower than that of patients not receiving it, and the proportion of their drug expenditure in the total cost was also significantly higher. There was no significant difference in the average length of hospital stay between patients receiving and not receiving infusion.Conclusions:Intravenous infusion predicts greater drug use, and long-term infusion has a bad effect on rehabilitation and recovery. Various measures should be taken to reduce the utilization of intravenous infusion and standardize its application.

OBJECTIVETo evaluate therapeutic effects of Wallis interspinous dynamic stabilization in treating ASD after lumbar spinal fusion.

METHODSTotally 40 patients (included 16 males and 24 females, aged 25 to 60 years old) with degenerative disc disease were treated with posterior interbody fusion. Among them, 20 cases (treatment group) were treated with posterior interbody fusion combined with Wallis interspinous dynamic stabilization, while other 20 cases (control group) only treated with posterior interbody fusion. JOA score and VAS score were compared after inserted Wallis interspinous dynamic stabilization at 1 month and 3 years, and changes of intervertebral disc height of adjacent segment and cross-sectional area of the canal were tested and compared.

RESULTSAll patients were followed up from 3 to 5 years with an average of 3.6 years. All injuries were healed at stage I and the pain were released after treatment. There were no significant meaning in JOA score and VAS score at 1 month after treatment between two groups (P>0.05), while had meaning at 3 years (P<0.05). There were no statistical significane in intervertebral disc height of adjacent segment and cross-sectional area of the canal at 1 month after treatment (P>0.05), while had statistical meaning at 3 years (P<0.05).

CONCLUSIONThere is no difference in immediate effects between two groups. Both of them can obtain good results for effective decompression. Medial-term effectiveness of treatment group is obviously better than control group, which depends on Wallis interspinous dynamic stabilization to plays good biology effects and effective accelerate adjacent degeneration caused by lumbar fusion.

Adult ; Decompression, Surgical ; Female ; Humans ; Intervertebral Disc Degeneration ; surgery ; Lumbar Vertebrae ; surgery ; Male ; Middle Aged ; Spinal Fusion ; Treatment Outcome

The binding mechanism between pefloxacin mesylate (PM) and transferrin (Tf) was explored using spectral experiment combined with molecular modeling techniques. The binding parameters and thermodynamic functions of PM-Tf solution system were measured at different temperatures. The effect of PM on molecular conformation of Tf was investigated and the interaction mechanism was also discussed. The results showed that dynamic quenching mechanism occurs with PM binding to Tf. The value of binding distances (r) is low, which indicates the occurrence of energy transfer. The drug had conformational effect on Tf, which resulted in changes of hydrophobic environment of the binding domain in Tf. According to the obtained thermodynamic parameters, the main interaction force between PM and Tf is attributed to hydrophobic bonding. The results of molecular modeling revealed that hydrophobic and hydrogen bonds are main binding forces in the PM-Tf system. These results were in accordance with spectral experiments. The research results have given a better theoretical reference for the study of pharmacological mechanism between protein and quinolone.
Hydrophobic and Hydrophilic Interactions ; Models, Molecular ; Pefloxacin ; chemistry ; metabolism ; Protein Binding ; Protein Conformation ; Thermodynamics ; Transferrin ; chemistry ; metabolism