The infrastructure of Liberia has been destroyed due to the prolonged civil war.In this situation,it's critical for the Medical Contingent to have a good self-communication to carry out medical support for the United Nations Mission in Liberia.The communication instruments,their management and maintenance are introduced in this paper.The communication support for large-scale movement is emphasized on.The methods for using effectively the restricted Internet connection are discussed in detail.To cope with the problems of poor communication between the Medical Contingent and homeland,an Internet connection system is put forward which is based on VSAT(very small aperture terminal)hardware platform and subscription of international Internet connection.The system is believed to be reliable,economical,flexible and convenient.

Objective By contrasting and analyzing the clinic manifestations, radiological features and pathological results of patients with bone invasion from skin of the lower limbs that were associated with malignancy, authors advanced X-ray diagnostic evidence to promote its diagnostic accuracy. Methods The radiological appearances of squamous cell carcinoma arising in chronic ulcers, sinus and scars of the lower limbs in 16 patients from February 1968 to April 2002 confirmed by pathology, were analyzed retrospectively. All cases were taken posterior-anterior and lateral radiograph before operation. There were 15 males and 1 females aging from 15 to 67 years (mean, 50.4 years). The lesion was located at the front of tibia in 15, and the middle inferior part of femur. The medical history of primary diseases varied from 1 to over 50 years with an average of 20 years and 3 months. Of 16 cases, the duration of 8 cases from a sudden change of state of an illness to the final diagnosis was 4 to 6 months, 4 cases above 1 year, and 4 cases were found with no any change of state of an illness. Results There were 14 cases observed as typical chronic osteomyelitis, which demonstrated peripheral osteolytic defect, 13 cases with osteolytic destruction spreading outwards from front of tibia, and 1 case with widespread osteolytic destruction in the middle and inferior part of femur. Floating-ice-like rudimental bone in the defect was found in 11 cases, and 4 case were observed with old fracture. 2 cases without obvious history of typical chronic osteomyelitis, 1 case with soft tissue trauma and 1 case of burn, showed small Saucer-like erosion of the cortex and huge lobar soft tissue masses. Moreover, patchy shadow and Codman's triangle were found in 1 case of burn. Furthermore, lobar soft tissue masses and huge ulcer accord with osteolytic destruction was observed in all cases, and soft tissue masses were larger than the area of bony destruction in 6 cases. Conclusion Roentgenogram could display shape, location and extension of bone invasion from skin of the lower limbs that were associated with malignancy, which contribute to diagnose the lesion and provide useful evidence for surgical plan.

Objective To study the clinical effectiveness of a modified laparoscopic high ligation in treatment of inguinal hernial sac in infants. Methods The high ligation of hernial sac was conducted using a modified method: the laparoscopic suture of hernia sac was performed with No. 4 thread in two semi-circles, facilitated by a No. 8 syringe needle holding outside of the body. Two thread ends were knotted outside by supporting trocar and then put back into the abdomen. The thread end was tightened and knotted subcutaneously at the groin. A total of 183 infants received the modified ligation.The average operation time, postoperative hospitalization stay, and the rates of postoperative reoccurrence and complication were observed and the operative efficacy was evaluated. Results The modified laparoscopic high ligation was successfully conducted in all the 183 infants (142 males and 41 females, 278 sides in total) without transitional opening. Unilateral operation time lasted from 6. 8-15. 2 min (with a mean of [13.1±1.2] min). Bilateral operation time lasted from 22. 7-33. 3 min (with a mean of [28.4±4.7] min). Postoperative hospitalization stay varied from 1 day to 3 days (with a mean of [2.3±0.6] days). The postoperative reoccurrence rate was 0.7%. Delitescence hernia was identified in 48 cases (35. 2%) and was treated by high ligation. Conclusion Our modifie dlaparoscopic high ligation for treatment of inguinal hernia sac is effective, easy-to-performandeasy- to-learn, making it worth popularizing in clinic.

Objective To estimate blood lead level of children in Jinchang city of Gansu province.Methods According to relevant request,256 children(male 133,female 123) aged 2-7 years from some kindergartens in Jinchang city were randornly selected from Oct. 2004 to Jun. 2005. Blood lead level was measured by atom-absorbing graphiteingle method.Results The average blood lead level of 256 children was(126.30?52.98)?g/L.The lowest blood lead level was 28.3 ?g/L while the highest was 268.0 ?g/L.And 160 children(62.54%) were found with a blood lead level ≥100 ?g/L(the diagnostic level of lead poisoning in children).The blood lead level became higher with the increase of children′s age,as groups aged 2-3 years group were lower than aged 5-6 years and 6-7 years groups,of which the differenes had statistical significance(P0.05).Conclusion Blood lead levels of children in Jinchang city and prevalence of lead poisoning are both relatively higher,to which enough attention shall be paid.

Protamex,flavorzyme and neutrase were used for bienzyme hydrolysis of Mytilus edulis.Protamex and flavorzyme were determined as the optimal hydrolases by analysis of hydrolysis effects.After bienzyme hydrolysis,ester forming yeast fermentation was used to prepare seasoner.The effects of fermentation of single or compound strains on the value of FAN were detected by formaldehyde titration method.The results showed that the value of FAN was 0.65% when the conditions of ester forming yeast 1274 were as follows:inoculation volume 5%(v/v),fermentation temperature 28℃ and culture time 72h after bienzyme hydrolysis;the value of FAN was 0.78% when the hydrolytic solution was fermented by compound strains including ester forming yeast 1274 and 1202 under the same fermentation conditions.After fermentation of ester forming yeast,the seasoner gave a full-bodied smell of ester with fermentation flavour.

In order to make students have integrative qualities and reform the shortage of former teaching methods in the food microbiology experiment,a new experiment teaching system was established,introducina the integrative and innovative experiment to the students gradually.The reformation of experiment in food microbiology has trained the students well and improved their special skills.Most important of all,it can offer them a chance to realize their own ideas.The students can design an innovative and integrative experiment to carry out their originalities.Good effects have been made since this system is very helpful to improve their consciousness of innovation and integrative abilities in doing experiments.

Objective To analyze the clinical features of rectal and perianal inflammatory myofibroblastic tumor and evaluate its diagnosis and treatment.Method Clinicopathological data of 3 cases diagnosed as inflammatory myofibroblastic tumor from January,2005 to June,2011 were retrospectively reviewed.Results Inflammatory myofibroblastic tumor presents as infiltrative growth mass with rich vascularization on CT or MRI,and is difficult to distinguish from hemangioma and other rectal tumors.Preoperative biopsy usually fails to ascertain the entity of mass,and pathological examination of the whole resected specimen with immunohistochemical staining is needed to make final diagnosis.All 3 cases underwent sphincter preserving surgery.One case received a second radical operation 16 months after primary resection because of local recurrence.All patients are followed up to now,with a survival time of 67 months,55 months,and 35 months respectively.Conclusions Rectal and perianal inflammatory myofibroblastic tumor is difficult to diagnose on preoperative imaging examinations or biopsy.Immunohistochemical staining is needed to make final diagnosis.Sphincter preserving surgery with complete tumor removal could achieve long term survival.

1,3,5-Trimethylbenzene (1,3,5-TMB) was used as the pore-enlarging modifier to expand the pore size of MCM-41 (mobil company of matter) mesoporous silica nanoparticles. The solvent impregnation method was adopted to assemble non-water-soluble β-carotene into the pore channel of MCM-41. The MCM-41 and drug assemblies were characterized by TEM, FT-IR, elemental analysis and N2 adsorption-desorption. The results showed that MCM-41 has good sphericity and regular pore structure. The research also investigated the optimal loading time, the drug loading and the vitro stability of the β-carotene. As a drug carrier, the modified MCM-41 showing a shorter drug loading time, the drug loading as high as 85.58% and the stability of β-carotene in drug assemblies has improved. The study of this new formulation provides a new way for β-carotene application.
Drug Carriers ; chemistry ; Drug Delivery Systems ; Drug Stability ; Nanoparticles ; chemistry ; Silicon Dioxide ; chemistry ; beta Carotene ; chemistry ; pharmacology

With low molecular weight chitosan and poloxamer 188 as the joint carriers, ginsenoside Rg3 solid dispersions were prepared by using the solvent evaporation method for an in vitro dissolution test. Subsequently, differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and X-ray diffraction (X-RD) were adopted for a phase analysis. The results showed that the 60 min in vitro cumulative dissolution rate of ginsenoside Rg3 solid dispersions prepared with low molecular weight chitosan and poloxamer 188 at the ratio of 2:1 exceeded 90%, and the drug was dispersed in carriers in an amorphous state. Therefore, ginsenoside Rg3 solid dispersions prepared with low molecular weight chitosan and poloxamer 188 could help significantly improve the drug dissolution, with a practical application value.
Chitosan ; chemistry ; Drug Compounding ; methods ; Ginsenosides ; chemistry ; Molecular Weight ; Poloxamer ; chemistry ; Solvents ; chemistry

To establish the online two-dimensional liquid chromatography by using double gradient liquid chromatography system and UV detector, in order to simultaneously determine the content of paeoniflorin, paenol, amygdaloside and cinnamic acid. A pump of the two-dimensional liquid chromatography was adopted as the one-dimensional separation pump. C18 (3.0 mm x 150 mm, 3 microm) was used as the analytical column, with acetonitrile as the organic phase and 0.08% phosphoric acid + 0.08% triethylamine as the aqueous phase for gradient elution at the flow rate of 0.5 mL x min(-1). Another pump of the two-dimensional liquid chromatography was adopted as the two-dimensional separation pump. PAII C18 was used as the analytical column, with acetonitrile as the organic phase and 20 mmol, pH 3.0 monopotassium phosphate as the aqueous phase for gradient elution at the flow rate of 0.8 mL x min(-1). The detection wavelengths were set at 218, 230, 275 nm by using wavelength time-switching program. The linearity range of paeoniflorin, amygdaloside, paeonol and cinnamic acid were 5.55-222 (r = 0.999 7), 6.6-264 (r = 0.999 8), 3.3-132 (r = 0.999 5) and 0.315-12.6 mg x L(-1) (r = 0.999 7), respectively. The average recoveries of the four components were between 96.12% and 103.9%. The experiment proved that this method was so rapid and accurate in determination results that it could be used for evaluating drug quality.
Capsules ; Chromatography, Liquid ; methods ; Drugs, Chinese Herbal ; chemistry ; Online Systems ; Time Factors