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Wu XW, Karuppiah C, Wu YS, Zhang BR, Hsu LF, Shih JY, James Li YJ, Hung TF, Kannan Ramaraj S, Jose R, Yang CC. Unveiling high-power and high-safety lithium-ion battery separator based on interlayer of ZIF-67/cellulose nanofiber with electrospun poly(vinyl alcohol)/melamine nonwoven membranes. J Colloid Interface Sci 2024; 658:699-713. [PMID: 38141392 DOI: 10.1016/j.jcis.2023.12.098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Revised: 12/11/2023] [Accepted: 12/14/2023] [Indexed: 12/25/2023]
Abstract
Due to the poor thermal stability of conventional separators, lithium-ion batteries require a suitable separator to maintain system safety for long-term cycling performance. It must have high porosity, superior electrolyte uptake ability, and good ion-conducting properties even at high temperatures. In this work, we demonstrate a novel composite membrane based on sandwiching of zeolitic imidazole frameworks-67 decorated cellulose acetate nanofibers (ZIF-67@CA) with electrospun poly(vinyl alcohol)/melamine (denoted as PVAM) nonwoven membranes. The as-prepared sandwich-type membranes are called PVAM/x%ZIF-67@CA/PVAM. The middle layer of composite membranes is primarily filled with different weight percentages of ZIF-67 nanoparticles (x = 5, 15, and 25 wt%), which both reduces the non-uniform porous structure of CA and increases its thermal stability. Therefore, our sandwich-type PVAM/x%ZIF-67@CA/PVAM membrane exhibits a higher thermal shrinkage effect at 200 °C than the commercial polyethylene (PE) separator. Due to its high electrolyte uptake (646.8%) and porosity (85.2%), PVAM/15%ZIF-67@CA/PVAM membrane achieved high ionic conductivity of 1.46 × 10-3 S cm-1 at 70 °C, as compared to the commercial PE separator (ca. 6.01 × 10-4 S cm-1 at 70 °C). Besides, the cell with PVAM/15%ZIF-67@CA/PVAM membrane shows an excellent discharge capacity of about 167.5 mAh g-1after 100 cycles at a 1C rate with a capacity retention of 90.3%. The ZIF-67 fillers in our sandwich-type composite membrane strongly attract anions (PF6-) through Lewis' acid-base interaction, allowing uniform Li+ ion transport and suppressing Li dendrites. As a result, we found that the PVAM/15%ZIF-67@CA/PVAM composite nonwoven membrane is applicable to high-power, high-safety lithium-ion battery systems that can be used in electric vehicles (EVs).
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Affiliation(s)
- Xiao-Wei Wu
- Battery Research Center of Green Energy, Ming Chi University of Technology, New Taipei City 24301, Taiwan, ROC; Department of Chemical Engineering, Ming Chi University of Technology, New Taipei City 243, Taiwan, ROC
| | - Chelladurai Karuppiah
- Battery Research Center of Green Energy, Ming Chi University of Technology, New Taipei City 24301, Taiwan, ROC.
| | - Yi-Shiuan Wu
- Battery Research Center of Green Energy, Ming Chi University of Technology, New Taipei City 24301, Taiwan, ROC
| | - Bo-Rong Zhang
- Battery Research Center of Green Energy, Ming Chi University of Technology, New Taipei City 24301, Taiwan, ROC; Department of Chemical Engineering, Ming Chi University of Technology, New Taipei City 243, Taiwan, ROC
| | - Li-Fan Hsu
- Battery Research Center of Green Energy, Ming Chi University of Technology, New Taipei City 24301, Taiwan, ROC
| | - Jeng-Ywan Shih
- Battery Research Center of Green Energy, Ming Chi University of Technology, New Taipei City 24301, Taiwan, ROC; Department of Chemical Engineering, Ming Chi University of Technology, New Taipei City 243, Taiwan, ROC
| | - Ying-Jeng James Li
- Battery Research Center of Green Energy, Ming Chi University of Technology, New Taipei City 24301, Taiwan, ROC; Department of Chemical Engineering, Ming Chi University of Technology, New Taipei City 243, Taiwan, ROC
| | - Tai-Feng Hung
- Battery Research Center of Green Energy, Ming Chi University of Technology, New Taipei City 24301, Taiwan, ROC
| | - Sayee Kannan Ramaraj
- PG and Research Department of Chemistry, Thiagarajar College, Madurai, Tamil Nadu, India
| | - Rajan Jose
- Center for Advanced Intelligent Materials & Faculty of Industrial Sciences and Technology, University Malaysia Pahang Al-Sultan Abdullah, 26300 Kuantan, Pahang, Malaysia
| | - Chun-Chen Yang
- Battery Research Center of Green Energy, Ming Chi University of Technology, New Taipei City 24301, Taiwan, ROC; Department of Chemical Engineering, Ming Chi University of Technology, New Taipei City 243, Taiwan, ROC; Department of Chemical and Materials Engineering, Chang Gung University, Kwei-shan, Taoyuan 333, Taiwan, ROC.
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Yang ZT, Zhang MT, Zhou JP, Wu D, Liu T, Zhang BR, Yun XD. [Progress in arthroscopic surgery for injury of superior labrum anterior posterior of shoulder joint]. Zhongguo Gu Shang 2023; 36:193-8. [PMID: 36825425 DOI: 10.12200/j.issn.1003-0034.2023.02.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Superior labrum anterior posterior (SLAP) injury is a major challenge for orthopedic surgeons, due to the poor healing ability of the injured labrum. Although arthroscopic surgery is the gold standard for the treatment of SLAP injury, there are still disputes about the adaptation of different surgical techniques, the choice of anchors during operation, knotted or knotless anchors, and fixation methods. The authors believe that arthroscopic repair of SLAP lesions is effective for young patients with intact glenoid labrum(<35 years old) or with extensive activity, where single and knotless anchor is preferred. For the older patients(≥35 years old) with degeneration and wear of glenoid labrum, biceps tenodesis is more preferable, and interference screw fixation technique is recommended. As for patients with failed SLAP repair, biceps tenodesis can achieve a high success rate as a revision surgery. By review of the relevant literature in recent years, this paper summarizes the adaptation of different surgical methods of arthroscopic treatment of SLAP injury, intraoperative anchoring techniques, fixation methods and other improved surgical techniques.
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Affiliation(s)
- Zhi-Tao Yang
- Department of Orthopaedics, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China
| | - Ming-Tao Zhang
- Department of Orthopaedics, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China
| | - Jian-Ping Zhou
- Department of Orthopaedics, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China
| | - Ding Wu
- Department of Orthopaedics, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China
| | - Tao Liu
- Department of Orthopaedics, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China
| | - Bo-Rong Zhang
- Department of Orthopaedics, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China
| | - Xiang-Dong Yun
- Department of Orthopaedics, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China; Key Laboratory of Bone and Joint Disease of Gansu Province, Lanzhou 730030, Gansu, China
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Liu T, Zhang MT, Yang ZT, Zhang BR, Jiang J, An LP, Liu FX, Yang WL, Yun XD. [Arthroscopic subscapularis augmentation for the treatment of recurrent dislocation of shoulder with severe glenoid injury]. Zhongguo Gu Shang 2022; 35:996-999. [PMID: 36280420 DOI: 10.12200/j.issn.1003-0034.2022.10.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
OBJECTIVE To investigate the method and clinical effects of the treatment of recurrent shoulder dislocation with severe glenoid injury by arthroscopic subscapularis augmentation. METHODS From March 2019 to August 2020, 16 patients with recurrent dislocation of shoulder with severe glenoid injury underwent arthroscopic subscapularis augmentation, including 10 males and 6 females, aged from 18 to 50 years old with an average of (29.06±10.54) years old, 4 cases of left shoulder and 12 cases of right shoulder.Visual analogue scale (VAS), American Shoulder and Elbow Surgeons (ASES) score and Rowe score were used to evaluate shoulder function and stability before and after operation. RESULTS All the 16 patients were followed up from 12 to 29 months, with an average of (18.75±7.26) months. VAS score decreased from 5.25±1.13 before operation to 1.37±0.65 at the final follow-up;ASES score increased from 59.44±9.93 before surgery to 90.88±4.00 at the final follow-up; Rowe score of shoulder increased from 51.56±8.89 before surgery to 92.19±7.06 at the final follow-up, and the differences were statistically significant (P<0.05). No dislocation was observed during follow-up. No clinical complications such as incision infection, vascular and nerve injury occurred in all patients after operation. CONCLUSION Arthroscopic subscapularis augmentation in the treatment of recurrent dislocation of shoulder with severe glenoid injury is satisfactory. It is an effective treatment method of recurrent dislocation of shoulder joint with severe glenoid injury, and external rotation function in patients with almost unaffected.
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Affiliation(s)
- Tao Liu
- Department of Orthopaedics, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China
| | - Ming-Tao Zhang
- Department of Orthopaedics, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China
| | - Zhi-Tao Yang
- Department of Orthopaedics, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China
| | - Bo-Rong Zhang
- Department of Orthopaedics, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China
| | - Jin Jiang
- Department of Orthopaedics, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China
| | - Li-Ping An
- Department of Orthopaedics, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China
| | - Fang-Xiang Liu
- Department of Orthopaedics, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China
| | - Wei-Li Yang
- Department of Orthopaedics, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China
| | - Xiang-Dong Yun
- Department of Orthopaedics, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China
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Yu YL, Zhang BR. [The works of Zhang Wenzhong as the Shang Yao Feng Yu in the early Tang Dynasty]. Zhonghua Yi Shi Za Zhi 2022; 52:276-281. [PMID: 36268663 DOI: 10.3760/cma.j.cn112155-20210301-00032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Zhang Wenzhong, a famous Chinese medical doctor in the early Tang Dynasty, was granted a particular position as Shang Yao Feng Yu, for the Empress Wu Ze Tian dealing with medication. He was good at dealing with stroke in particular. He also had unique viewpoints towards medical prescriptions and skills. He wrote medical books and developed his own medical theories. All these were recorded in both the Book of Tang and the New Book of Tang. However, most of his works had been lost due to time and the frequent wars in the middle and late Tang Dynasty. Six medical prescriptions signed by Zhang Wenzhong were discovered in documents unearthed from the Dun Huang Sutra Cave. They were believed to be important archives of Zhang Wenzhong's writing and medical thoughts. In addition, some pieces of work found in the documents unearthed from Tu Yu Gou were suspected of being written by Zhang Wenzhong. This can be compared with his works cited in the handed-down documents, such as The Collection of Secret Prescriptions (Wai Tai Mi Yao Fang). This paper takes a textual research approach to examine the medical works of Zhang Wenzhong, comparing the handed-down documents with the unearthed documents to examine his medical achievements.
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Affiliation(s)
- Y L Yu
- Institute of Science,Technology and Humanities, Shanghai University of Traditional Chinese Medicine,Shanghai 201203,China
| | - B R Zhang
- Institute of Science,Technology and Humanities, Shanghai University of Traditional Chinese Medicine,Shanghai 201203,China
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Zhang MT, Liu JX, Yang ZT, Liu T, Zhang BR, An LP, Yun XD. [Comparative study on arthroscopic double posterior medial approach versus open surgery for acute simple posterior cruciate ligament tibial avulsion fracture]. Zhongguo Gu Shang 2022; 35:506-511. [PMID: 35730218 DOI: 10.12200/j.issn.1003-0034.2022.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
OBJECTIVE To compare difference in clnical efficacy between arthroscopic double posterior internal approach and incisional surgery for acute simple posterior cruciate ligament tibial avulsion fractures. METHODS Totally 52 patients with acute simple posterior cruciate ligament tibial avulsion fractures treated from June 2016 to June 2020 were retrospectively analyzed and divided into two groups according to different surgical protocols, 27 patients in arthroscopic group were treated with arthroscopic double posterior internal approach, including 16 males and 11 females, aged from 19 to 52 years old, with an average age of (34.9±9.2) years old;25 patients in open reduction group were treated with posterior medial knee incision, including 14 males and 11 females, aged from 18 to 54 years old , with an average age of(33.7±8.4) years old. Operation time, incision length, intraoperative bleeding, hospitalization days, hospitalization cost, fracture healing, complications, postoperative Lysholm score and IKDC score at 12 months were observed and compared between two groups. RESULTS All patients in both groups were completed opertaion successfully without vascular or nerve injury, and 52 patients were followed up from 6 to 24 months with an average of (15.0±1.7) months. Operation time and hospitalization cost in arthroscopic group were significantly greater than those in open reduction group(P<0.05);intraoperative bleeding, incision length, and hospitalization days in arthroscopic group were less than those in open reduction group(P<0.05);preoperative Lysholm score in arthroscopic group and open reduction group were 49.1±2.3 and 48.9±1.1 respectively, and improved to 95.9±1.7 and 86.4±1.2 at 12 months after operation respectively(P<0.05);preoperative IKDC scores in arthroscopic group and open reduction group were 47.6±4.1 and 48.1±3.9 respectively, and improved to 96.9±1.5 and 87.1±1.4 at 12 months after operation(P<0.05). CONCLUSION Arthroscopic double posterior internal approach for acute simple posterior cruciate ligament tibial stop avulsion fracture has satisfactory early results and better efficacy than traditional open surgery, which has advantages of less trauma, faster recovery and easier operation.
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Affiliation(s)
- Ming-Tao Zhang
- Department of Orthopaedics, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China
| | - Jia-Xin Liu
- Department of Orthopaedics, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China
| | - Zhi-Tao Yang
- Department of Orthopaedics, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China
| | - Tao Liu
- Department of Orthopaedics, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China
| | - Bo-Rong Zhang
- Department of Orthopaedics, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China
| | - Li-Ping An
- Department of Orthopaedics, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China
| | - Xiang-Dong Yun
- Department of Orthopaedics, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China
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Zhang MT, Liu JX, Yang ZT, Liu T, Zhang BR, An LP, Yun XD. [Early efficacy analysis on arthroscopic autologous osteochondral grafting in the treatment of recurrent anterior shoulder dislocation]. Zhongguo Gu Shang 2022; 35:233-237. [PMID: 35322612 DOI: 10.12200/j.issn.1003-0034.2022.03.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
OBJECTIVE To investigate the early efficacy of arthroscopic autologous osteochondral grafting in the treatment of recurrent anterior shoulder dislocation. METHODS From January 2019 to January 2021, 17 patients with recurrent anterior dislocation of shoulder who underwent arthroscopic autologous osteochondral grafting were selected, including 12 males and 5 females, ranging in age from 17 to 55 years old, with a mean of (32.88±12.33) years old. Rowes rating system for Bankart repair(Rowe), Oxford Shoulder Instability Score (OSIS) and Simple Shoulder Test (SST) were compared before operation, 6 months after operation and at the latest follow-up. OSIS and SST used to evaluate shoulder function were recorded before surgery and at the latest follow-up. The shoulder mobility and intraoperative and postoperative complications were also recorded. RESULTS All 17 patients were followed up, and the duration ranged from 7 to 25 months, with a mean of (18.4±5.4) months. During the follow-up period, there was no re-dislocation, no vascular or nerve injury. Rowe score increased from 26.2±6.0 before operation to 74.4±4.0 and 82.4±3.1 after 6 months and the latest follow-up. There was significant difference in Rowe score between different time points after operation and before operation (P<0.05). The OSIS increased from 37.0±3.6 before operation to 47.4±2.6 and 52.7±2.6 after 6 months and the latest follow-up. There was significant difference in OSIS between different time points after operation and before operation (P<0.05). The SST score increased from 6.8±0.7 before operation to 9.8±0.8, 11.6±2.6 after 6 months and the latest follow-up. There was significant difference in SST score between different time points after operation and before operation (P<0.05). At the latest follow-up, the lateral external rotation and abduction external rotation activities of the patient were significantly improved compared with those before operation. CONCLUSION This study provides preliminary evidence that arthroscopic autologous osteochondral grafting can achieve satisfactory early clinical outcomes and stability in patients with recurrent anterior shoulder dislocation with glenoid fracture and defect less than <20%, which is a reliable and effective procedure.
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Affiliation(s)
- Ming-Tao Zhang
- Department of Orthopaedics, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China
| | - Jia-Xin Liu
- Department of Orthopaedics, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China
| | - Zhi-Tao Yang
- Department of Orthopaedics, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China
| | - Tao Liu
- Department of Orthopaedics, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China
| | - Bo-Rong Zhang
- Department of Orthopaedics, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China
| | - Li-Ping An
- Department of Orthopaedics, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China
| | - Xiang-Dong Yun
- Department of Orthopaedics, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China
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Zhang BR, Liu AH, Mo DP, Huo XC, Liu P, Jin HW, Miao ZR. [Endovascular thrombectomy in patients with intracranial large artery occlusion and atrial fibrillation]. Zhonghua Yi Xue Za Zhi 2019; 99:3068-3072. [PMID: 31648448 DOI: 10.3760/cma.j.issn.0376-2491.2019.39.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the safety and efficacy of mechanical thrombectomy in patients with atrial fibrillation complicated with acute intracranial arterial occlusion. Methods: Fifty-eight patients with atrial fibrillation complicated with acute intracranial arterial occlusion in the intervention group of East (Endovascular Therapy for Acute ischemic Stroke Trial) were analyzed. According to the TOAST (Trial of Org 10 172 in Acute Stroke Treatment) classification, patients were divided into ICAS (Intracranial Atherosclerotic Stenosis) group and cardiogenic embolism group. Clinical characteristics, treatment methods and clinical prognosis were compared between ICAS group and cardiogenic embolism group. Results: A total of 58 patients with atrial fibrillation complicated with acute intracranial arterial occlusion were included in this study, including 46 patients in the cardiogenic embolism group (79%) and 12 patients in the ICAS group (21%). The pre-hospital transport time in ICAS group was longer than that in cardiogenic embolism group (P<0.05).Patency rate in patients with atrial fibrillation complicated with acute intracranial arterial occlusion was 98.3% (57/58), The rate of patients with the 90-day function independent (mRS 0-2) was 51.7% (30/58). There were no statistically significant differences in functional independence, mortality rate, ICH and sICH at 90 days between the cardiogenic embolism group and the ICAS group. Conclusions: Mechanical thrombectomy is an effective method to treat patients with atrial fibrillation complicated with acute intracranial arterial occlusion.
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Affiliation(s)
- B R Zhang
- Beijing Neurosurgical Institute, Capital Medical University, Beijing 100070, China
| | - A H Liu
- Beijing Neurosurgical Institute, Capital Medical University, Beijing 100070, China
| | - D P Mo
- Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070, China
| | - X C Huo
- Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070, China
| | - P Liu
- Beijing Neurosurgical Institute, Capital Medical University, Beijing 100070, China
| | - H W Jin
- Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070, China
| | - Z R Miao
- Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070, China
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Wang LY, Feng X, Zhang BR, Ma N, Guo EK, Peng F, Tong X, Liu AH. [Efficacy analysis of LVIS and Enterprise stent assisted coil in the treatment of vertebral artery dissection aneurysm]. Zhonghua Yi Xue Za Zhi 2019; 99:685-689. [PMID: 30831618 DOI: 10.3760/cma.j.issn.0376-2491.2019.09.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To observe and evaluate the therapeutic efficacy of LVIS stent and Enterprise stent assisted coil in embolization of vertebral artery dissection aneurysm (VDA). Methods: Clinical data of 96 patients with VDAs treated by LVIS stent and Enterprise stent assisted coil were analyzed retrospectively between January, 2013 and June, 2017.Of all, the LVIS stent assisted coil was performed in 28 patients (LVIS-stent group) and Enterprise in 68 patients (Enterprise-stent group). The clinical and imaging follow-up were performed. The instant embolization rate, complications, and recurrence rate were analyzed and compared between the two groups. Results: Instant angiographic results:in the LVIS stent group, complete occlusion was achieved in 17 VDAs (60.7%), near-complete occlusion in 10VDAs (35.7%), and partial occlusion in 1 VDA (3.6%). In the Enterprise stent group, complete occlusion was achieved in 27 VDAs (39.7%), near-complete occlusion in 34VDAs(50.0%), partial occlusion in 7VDAs (10.3%). Procedure-related complications occurred in 3 patients (10.7%) in LVIS stent group and 3 patients (4.4%) in Enterprise stent group. DSA follow-up was performed during 6 to 12 months after surgery, and 10 patients with vertebral artery dissection aneurysm recurred, 2 in the LVIS group and 8 in the Enterprise stent group. The latest modified Rankin Scale score was 0 in 55 patients,1 in 13, 2 in 1, 3 in 1, and 6 in 1. Among them, all follow-up patients in the LVIS stent group had good prognosis, while in the Enterprise stent group, 50 patients (94.4%) had a good prognosis. Conclusions: The stent-assisted coils have a higher degree of embolization in the vertebral artery dissection aneurysms, a higher rate of near-total embolization, a lower incidence of neurological complications, and a good prognosis. The complete andnear-complete occlusion rates and the incidence of neurological complicationsin the LVIS group was higher than that in the Enterprise groupand the recurrence ratesin the LVIS group was lower than that in the Enterprise group,both with no statistically significant difference.
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Affiliation(s)
- L Y Wang
- Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070 Chian
| | - X Feng
- Beijing Hospital Neurosurgery Beijing100005 Chian
| | - B R Zhang
- Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070 Chian
| | - N Ma
- The Neurosurgery Department, the First Hospital of Shanxi Medical University, Taiyuan 030001, China
| | - E K Guo
- Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070 Chian
| | - F Peng
- Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070 Chian
| | - X Tong
- Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070 Chian
| | - A H Liu
- Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070 Chian
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Ma N, Zhang BR, Feng X, Wang LY, Peng F, Liu AH. [Efficacy analysis of the endovascular treatment for 175 unruptured vertebrobasilar dissecting aneurysms]. Zhonghua Yi Xue Za Zhi 2018; 98:2176-2179. [PMID: 30032521 DOI: 10.3760/cma.j.issn.0376-2491.2018.27.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To analyze the clinical characteristics, clinical effect and follow-up outcome of the different endovascular treatment techniques in the treatment of unruptured vertebrobasilar dissecting aneurysms (VBDAs). Methods: The clinical data of 160 consecutive patients (175VBDAs) from January 2012 to December 2016 in Beijing Tiantan hospital were retrospectively analyzed.All of the 175 aneurysms were treated with endovascular embolization, including 115 stent-assisted coils, 27 simple stents, 21 blood flow diverting devices, and 12 parent arteries occlusion.The imaging and clinical follow-up were performed after the operation. Results: Headache including cervical-occipital pain(43.1%)was the most common clinical manifestation.The incidence of perioperative complications was 3.75%, no intraoperative bleeding and no deaths.The imaging findings of 113 aneurysms were followed up for (9.9±7.3) months.Of the 71 stent-assisted coils, 62 recovered well and 9 relapsed; of the 19 aneurysms treated with simple stent, 4 recovered well, 11 improved, 2 stable and 2 relapsed; of the 15 aneurysms treated by the blood flow diverting devices, 4 recovered and 11 improved; all of the 8 aneurysms with parent arteries occlusion recovered well.A total of 144 patients were follow-up (17.3±16.6) months by the Modified Rankin Scale(mRS) score: 140 patients were 0-2 score and 4 patients were 3-6 score. Conclusions: The clinical manifestations of the unruptured VBDAs are complex, and the headache is the most common clinical symptom.Endovascular treatment for the treatment of unruptured VBDAs is safe and feasible.The principle of individualization should be followed during embolization.
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Affiliation(s)
- N Ma
- Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, Beijing 100050, China
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Zhang BR, Larsson B, Lundeheim N, Rodriguez-Martinez H. Relationship between embryo development in vitro and 56-day nonreturn rates of cows inseminated with frozen-thawed semen from dairy bulls. Theriogenology 2007; 48:221-31. [PMID: 16728121 DOI: 10.1016/s0093-691x(97)84069-1] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/1996] [Accepted: 04/10/1997] [Indexed: 11/22/2022]
Abstract
Frozen-thawed bull semen with > 50% post-thaw motility from 40 batches (21 bulls, 2 consecutive ejaculates per batch) was used for fertilization (IVF) and embryo development in vitro to assess the relationship between field and laboratory fertility using a retrospective approach. Each frozen batch was tested in 3 or 4 replicates with 30 oocytes per replicate. Field fertility, quantified as the 56-d nonreturn rate and based on 89 to 441 artificial inseminations per frozen batch, ranged between 46.2 and 74.8%. The cleavage and blastocyst rates after IVF varied from 29.0 to 81.9% and from 1.8 to 32.0%, respectively, with significant differences among frozen batches. Rates of cleavage and blastocyst formation were significantly related to the nonreturn rate (r = 0.59, P < 0.001; r = 0.35, P < 0.05, respectively). The interaction between cleavage and blastocyst rate was 0.69 (P < 0.001). Significant variations (P < 0.05) among frozen semen batches within 15 bulls with >/= 2 different semen batches were found for the nonreturn rate (13.3%) of 2 bulls, for cleavage rates (26.7%) in 4 bulls and for blastocyst rates (20.0%) in 3 bulls. Significant differences (P < 0.05) among replicates within the 40 frozen semen batches were only found in 3 batches (7.5%) for the cleavage rate and in 7 batches (17.5%) for blastocyst rate. Overall, bull and frozen semen batch were the greatest sources of variation in the cleavage rate (30.6 and 29.4%, respectively), while testing date was the greatest source of variation in the blastocyst development rate (21.7%). The results indicated that in vitro fertilization and, to a lesser extent, culture to the blastocyst stage could be useful in estimating the potential fertilizing ability of frozen-thawed semen from dairy bulls.
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Affiliation(s)
- B R Zhang
- Department of Obstetrics & Gynecology Swedish University of Agricultural Sciences Uppsala, Sweden
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11
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Yang WQ, Dai L, You LP, Zhang BR, Shen B, Qin GG. Catalyst-free synthesis of well-aligned ZnO nanowires on In0.2Ga0.8N, GaN, and Al0.25Ga0.75N substrates. J Nanosci Nanotechnol 2006; 6:3780-3. [PMID: 17256330 DOI: 10.1166/jnn.2006.623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Well-aligned ZnO nanowires have been synthesized vertically on In0.2Ga0.8N, GaN, and Al0.25Ga0.75N substrates, using a catalyst-free carbon thermal-reduction vapor phase deposition method for the first time. The as-synthesized nanowires are single crystalline wurtzite structure, and have a growth direction of [0001]. Each nanowire has a smooth surface, and uniform diameter along the growth direction. The average diameter and length of these nanowires are 120-150 nm, and 3-10 )m, respectively. We suggest that the growth mechanism follow a self-catalyzing growth model. Excitonic emission peaked around 385 nm dominates the room-temperature photoluminescence spectra of these nanowires. The room-temperature photoluminescence and Raman scattering spectra show that these nanowires have good optical quality with very less structural defects.
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Affiliation(s)
- W Q Yang
- School of Physics, Peking University, Beijing 100871, PR China
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12
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Huo HB, Dai L, Xia DY, Ran GZ, You LP, Zhang BR, Qin GG. Synthesis and optical properties of ZnTe single-crystalline nanowires. J Nanosci Nanotechnol 2006; 6:1182-4. [PMID: 16736786 DOI: 10.1166/jnn.2006.179] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Single-crystalline ZnTe nanowires with the zincblende structure have been synthesized on silicon (Si) substrates via a vapor phase transport method. The ZnTe (99.99%) powders were used as the source, and 10 nm-thick thermal evaporated gold (Au) film was used as the catalyst. The as-prepared ZnTe nanowires have diameters of 30-80 nm and lengths of more than 10 microm. The products were analyzed by X-ray diffraction, field emission scanning electron microscopy, and high-resolution transmission electron microscopy. Optical properties of these nanowires were investigated by room-temperature Raman scattering spectrum and temperature-dependent photoluminescence measurements. The results show that the as-prepared ZnTe nanowires are of high crystal quality.
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Affiliation(s)
- H B Huo
- School of Physics, Peking University, Beijing, P R China
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13
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Ding WJ, Qian QF, Hou XL, Feng WY, Chen CY, Chai ZF, Zhang BR, Wang K. A preliminary study of chromium distribution in chromium-rich brewer's yeast cell by NAA. Biol Trace Elem Res 2002; 88:193-9. [PMID: 12296429 DOI: 10.1385/bter:88:2:193] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The purpose of this study was to assess the chromium (Cr) distribution in chromium-rich brewer's yeast cell. The chromium concentrations in the cell wall and protoplast fractions of the chromium-rich yeast were determined by neutron activation analysis (NAA). Moreover, the combined state of chromium and amino acid content in the Cr-rich brewer's yeasts was analyzed and measured. The experimental results indicate that the introduction of water-soluble chromium(III) salt as a component of the culture medium for yeasts results in a substantial amount of chromium absorbed through the cell wall by the yeast, among which 80.9% are accumulated in the protoplast. It implies that, under optimal conditions, yeasts are capable of accumulating large amounts of chromium and incorporating chromium into organic compounds.
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Affiliation(s)
- W J Ding
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, People's Republic of China
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14
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Abstract
Fresh spermatozoa from bulls established as 'good freezers' and 'poor freezers' (consistently > or = 50% or < 20% motile spermatozoa after cryopreservation, respectively) were incubated for 96 h in Tes/Tris-egg yolk or TALP-egg yolk media at 37 degrees, 20 degrees , 5 degrees or 0 degrees C. The TALP extender contained 0, 100 or 200 mM glycine betaine (GB) to test the hypothesis that GB would efficiently maintain spermatozoa function during long-term incubation. The percentage of motile spermatozoa declined over time in a temperature- and medium-dependent fashion. No spermatozoa were motile by 24 h incubation at 37 degrees C or by 72 h incubation at 0 degrees C, and there were no significant differences in the percentage of motile spermatozoa from either category of bull when spermatozoa were incubated in any media for less than 24 h. Spermatozoa from poor freezers were significantly more motile than spermatozoa from good freezers after 96 h at 20 degrees or 5 degrees C in TALP alone; however, GB at both 100 and 200 mM increased the percentage of motile spermatozoa in poor and good freezers and eliminated these differences. Overall, the presence of GB at either 100 or 200 mM significantly improved the percentage of motile spermatozoa at 20 degrees, 5 degrees and 0 degrees C, but not at 37 degrees C.
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Affiliation(s)
- B R Zhang
- Department of Biomedical Sciences, Ontario College of Veterinary Medicine, Canada
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15
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Yuan FC, Ran GZ, Chen Y, Zhang BR, Qiao YP, Fu JS, Qin GG, Ma ZC, Zong WH. [Photoluminescence from Er-doped silicon-rich silicon oxide film and Er-doped silicon-rich silicon nitride film and its annealing behavior]. Guang Pu Xue Yu Guang Pu Fen Xi 2001; 21:763-765. [PMID: 12958888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Room temperature photoluminescence (PL) with a peak at 1.54 microns was observed from silicon oxide, silicon-rich silicon oxide, silicon nitride and silicon-rich silicon nitride films, all doped with Er and grown by the magnetron sputtering technique. To determine the optimum annealing temperature for the 1.54 microns PL, these films were annealed in the range of 600-1,100 degrees C with an interval of 100 degrees C. Among these four types of films annealed at an identical temperature, the intensity of 1.54 microns PL peak of the Er-doped silicon-rich silicon oxide film was always the strongest one, which arrived at a maximum in 800 degrees C annealing. A 1.38 microns PL band was also observed in each of these four types of films, and which in the silicon-rich silicon oxide or silicon-rich silicon nitride films was found to be correlated with the 1.54 microns PL band in intensity.
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Affiliation(s)
- F C Yuan
- Department of Physics, Quanzhou Teacher's College, Quanzhou 36200, China
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16
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Hettinger AM, Allen MR, Zhang BR, Goad DW, Malayer JR, Geisert RD. Presence of the acute phase protein, bikunin, in the endometrium of gilts during estrous cycle and early pregnancy. Biol Reprod 2001; 65:507-13. [PMID: 11466219 DOI: 10.1095/biolreprod65.2.507] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Noninvasive, epitheliochorial placental attachment in the pig is regulated through endometrial production of protease inhibitors. The objective of the present study was to determine if the light-chain serine protease inhibitor of the inter-alpha-trypsin inhibitor family, bikunin, is produced by the porcine endometrium during the estrous cycle and early pregnancy. Western blot analysis revealed the presence of bikunin in uterine flushings of gilts collected during the luteal phase of the estrous cycle and early pregnancy (Days 12-18). However, bikunin unbound to the inter-alpha-trypsin heavy chains was detected only in endometrial explant culture medium obtained from estrus and pregnant (Days 12, 15, and 18) gilts. Endometrial bikunin gene expression was lowest on Day 10 of the estrous cycle and pregnancy, followed by a 30- to 77-fold increase on Day 15 of the estrous cycle and pregnancy. Bikunin gene expression decreased on Day 18 of the estrous cycle, whereas endometrial bikunin gene expression continued to increase in pregnant gilts. Bikunin mRNA was localized to the uterine glands between Days 15 and 18 of the estrous cycle and pregnancy. In addition to its role as a protease inhibitor, bikunin functions in stabilization of the extracellular matrix, which suggests that bikunin could be involved with facilitating placental attachment to the uterine epithelial surface in the pig.
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Affiliation(s)
- A M Hettinger
- Department of Animal Science, Oklahoma Agriculture Experiment Station, Oklahoma State University, Stillwater, Oklahoma 74078, USA
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17
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Merkies K, Larsson B, Kjellén L, Zhang BR, Buhr MM, Rodríguez-Martínez H. Relationship between heparin binding to spermatozoa and the fertility of dairy bulls. Theriogenology 2000; 54:1249-58. [PMID: 11192183 DOI: 10.1016/s0093-691x(00)00431-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The presence of heparin in in vitro media has been implicated in improved fertility parameters of bull spermatozoa. In a previous study, Zhang et al. (25) obtained an estimate of bull nonreturn rates based on spermatozoal concentration, motility and zona pellucida binding (24). The objective of this study was to test for a relationship between fertility parameters previously estimated for the same batch of cryopreserved semen (25) and amount of heparin bound to spermatozoa. 3H-heparin binding to spermatozoa was assessed by radioimmunoassay, and statistical correlations were drawn to previously measured sperm characteristics. Preliminary experiments established optimal binding conditions of 25 degrees C, and 60 min incubation with 3H-heparin at a concentration of 50,000 cpm. 3H-heparin bound to an average of 2.2 x 10(6) receptors/cell with a Kd of 2.0 x 10(-7) M. The total 3H-heparin bound to spermatozoa from different bulls was significantly different (P<0.003). However, the total 3H-heparin bound to spermatozoa was not correlated with any measured sperm parameter, including zona pellucida binding, embryo cleavage and blastocyst formation, and 56-day nonreturn rates (P>0.19). Thus, the total amount of heparin bound to the surface of spermatozoa may not be relevant to fertilizing ability.
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Affiliation(s)
- K Merkies
- Department of Obstetrics and Gynaecology, Swedish University of Agricultural Sciences (SLU), Uppsala
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18
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Zhang BR, Larsson B, Lundeheim N, Håård MG, Rodriguez-Martinez H. Prediction of bull fertility by combined in vitro assessments of frozen-thawed semen from young dairy bulls entering an AI-programme. Int J Androl 1999; 22:253-60. [PMID: 10442298 DOI: 10.1046/j.1365-2605.1999.00178.x] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
In the present study, we assessed the degree to which various bull sperm traits, including the ability to bind to homologous zona pellucidae (ZP) and to fertilize in vitro, were related to field fertility after AI as 56d-non-return rates (56d-NRR based upon 8620 AIs) with frozen-thawed semen from 12 Swedish Red and White young (11-13 months) bulls (3 freezing batches/bull, 1-2 consecutive ejaculates/batch), entering a national breeding program and housed at two AI-bull stations. Significant (p < 0.01) correlations among in vitro tests were found for swim-up separated spermatozoa (concentration and concentration of motile spermatozoa) with the ZP-binding assay (ZBA, r = 0.72 and r = 0.73, respectively) and blastocyst rates (r = 0.79 and r = 0.79, respectively). A strong correlation was found between cleavage and blastocyst rates (r = 0.81, p < 0.01). Whereas bull station influenced (p < 0.05-0.001) all these variables, bull only affected (p < 0.05) ZBA and cleavage. There was no significant difference in 56d-NRRs (p > 0.05, range 62-67.2%) among bulls, once the absolute NRRs had been corrected for season, area and parity. Neither bull, batch nor station had a significant effect on field fertility (p < 0.05). None of the single sperm traits/tests in vitro correlated significantly with in vivo fertility. A correlation with bull fertility was, however, found when measures of sperm traits were combined and predicted NRRs, calculated by regression analyses, were tested against observed 56d-NRRs. The predictive bull fertility, based on the tested three frozen batches, varied from 61.8 to 67.5% (p < 0.05) and was highly correlated with the observed fertility NRRs (r = 0.92, p < 0.001). Although the results suggest that the combined analyses of swim-up separated sperm traits, ZBA and IVF can be used to predict bull fertility, it might not be possible to determine the life-time fertility of a breeding sire owing to the limited number of observations made.
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Affiliation(s)
- B R Zhang
- Department of Obstetrics and Gynaecology, Swedish University of Agricultural Sciences (SLU), Uppsala, Sweden
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19
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Xia JH, Liu CY, Tang BS, Pan Q, Huang L, Dai HP, Zhang BR, Xie W, Hu DX, Zheng D, Shi XL, Wang DA, Xia K, Yu KP, Liao XD, Feng Y, Yang YF, Xiao JY, Xie DH, Huang JZ. Mutations in the gene encoding gap junction protein beta-3 associated with autosomal dominant hearing impairment. Nat Genet 1998; 20:370-3. [PMID: 9843210 DOI: 10.1038/3845] [Citation(s) in RCA: 323] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Hearing impairment is the most commonly occurring condition that affects the ability of humans to communicate. More than 50% of the cases of profound early-onset deafness are caused by genetic factors. Over 40 loci for non-syndromic deafness have been genetically mapped, and mutations in several genes have been shown to cause hearing loss. Mutations in the gene encoding connexin 26 (GJB2) cause both autosomal recessive and dominant forms of hearing impairment. To study the possible involvement of other members of the connexin family in hereditary hearing impairment, we cloned the gene (GJB3) encoding human gap junction protein beta-3 using homologous EST searching and nested PCR. GJB3 was mapped to human chromosome 1p33-p35. Mutation analysis revealed that a missense mutation and a nonsense mutation of GJB3 were associated with high-frequency hearing loss in two families. Moreover, expression of Gjb3 was identified in rat inner ear tissue by RT-PCR. These findings suggest that mutations in GJB3 may be responsible for bilateral high-frequency hearing impairment.
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Affiliation(s)
- J H Xia
- National Lab of Medical Genetics of China, Changsha, Hunan, PRC.
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20
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Zhang BR, Larsson B, Lundeheim N, Rodriguez-Martinez H. Sperm characteristics and zona pellucida binding in relation to field fertility of frozen-thawed semen from dairy AI bulls. Int J Androl 1998; 21:207-16. [PMID: 9749351 DOI: 10.1046/j.1365-2605.1998.00114.x] [Citation(s) in RCA: 95] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The present study examined the relationship between bull sperm characteristics immediately post-thaw and some characteristics registered after swim-up, including the ability of spermatozoa to bind to homologous zona pellucidae (ZP) in vitro, and fertility after artificial insemination (AI) of 9426 females. Frozen-thawed semen from 22 AI bulls of the Swedish Red and White Breed, represented by 43 different frozen batches (1-4 batches/bull, 2 consecutive ejaculates/batch), was examined with the aim of determining concentration, motility patterns, morphology and membrane integrity. In addition, the frozen-thawed spermatozoa were subjected to a swim-up procedure and those separated in this way were tested with two assays of sperm-binding to the ZP of homologous oocytes in vitro (ZBA), using either a relative ZBA index against a control bull of proven high fertility or absolute binding (Absolute ZBA). The correlations of the various sperm traits and 56-day non-return rates (NRR) after field AI were retrospectively examined as single traits and as combinations of traits (combined measures), including regression analysis of significant traits. Among the sperm characteristics, positively significant (p < 0.01) correlations with NRR were found for linear motility post-thawing (r = 0.45-0.59) and the concentration of motile spermatozoa after swim-up (r = 0.43-0.63). Results obtained with the absolute ZBA approach were significantly (p < 0.05) correlated with NRR (r = 0.50), whereas the correlation between NRR and the ZBA index was not significant. The use of combined measures of sperm traits, including the ability to bind to ZP, showed a stronger predictive correlation with NRR (r = 0.68-0.75), compared with single traits. The results suggest that the combined analysis of sperm linear-motility patterns, swim-up separated sperm motility and absolute ZBA can provide a valuable assessment of the fertilizing capacity of AI bull semen.
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Affiliation(s)
- B R Zhang
- Department of Obstetrics and Gynaecology, Faculty of Veterinary Medicine, Swedish University of Agricultural Sciences, Uppsala, Sweden
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21
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Zhu ZG, Li HH, Zhang BR. Expression of endothelin-1 and constitutional nitric oxide synthase messenger RNA in saphenous vein endothelial cells exposed to arterial flow shear stress. Ann Thorac Surg 1997; 64:1333-8. [PMID: 9386700 DOI: 10.1016/s0003-4975(97)00859-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
BACKGROUND It has long been speculated that increased blood flow shear stress might be one of the major factors affecting the patency of grafted saphenous vein in coronary artery bypass operations. The underlying cellular and molecular mechanisms for so-called "shear stress damage" have not yet been well elucidated. METHODS Endothelial cells harvested from human saphenous vein were cultured in vitro and then exposed to a high arterial level flow shear stress in the parallel flow chamber. The expression levels of endothelin-1 and constitutional nitric oxide synthase by the endothelial cells were evaluated semiquantitatively at the gene transcription (messenger RNA) level using reverse transcription polymerase chain reaction. RESULTS After 7 hours of exposure to arterial level shear stress, the expression of constitutional nitric oxide synthase messenger RNA by saphenous vein endothelial cells was significantly reduced, whereas the expression of endothelin-1 messenger RNA was substantially increased. These changes were more predominant at 24 hours. CONCLUSIONS Arterial level flow shear stress could cause important changes in the gene transcription level in saphenous vein endothelial cells within a short period of time. The functional alterations of saphenous vein endothelial cells, as manifested by the increased expression of endothelin-1 and decreased expression of nitric oxide synthase messenger RNA, might play a crucial role in the vein graft remodeling process.
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Affiliation(s)
- Z G Zhu
- Department of Cardiothoracic Surgery, ChangHai Hospital of Second Military Medical University, People's Republic of China
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22
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Jaakma U, Zhang BR, Larsson B, Niwa K, Rodriguez-Martinez H. Effects of sperm treatments on the in vitro development of bovine oocytes in semidefined and defined media. Theriogenology 1997; 48:711-20. [PMID: 16728165 DOI: 10.1016/s0093-691x(97)00295-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/1997] [Accepted: 04/07/1997] [Indexed: 11/18/2022]
Abstract
Bovine in vitro matured oocytes were inseminated with frozen-thawed spermatozoa prepared by A) swim-up through Fert-TALP supplemented with hyaluronic acid (HYA, 1 mg/ml), heparin (5.0 microg/ml) and bovine serum albumin (BSA, 6 mg/ml) or B) washing by centrifugation in modified Brackett-Oliphant medium (mBO) supplemented with 10 mM caffeine-sodium benzoate. For Method A, in vitro fertilization (IVF) was performed in Fert-TALP supplemented with 6 mg/ml BSA, 5.0 microg/ml heparin, 20 microM D-penicillamine, 10 microM hypotaurine and 1 microM epinephrine. For Method B it was performed in mBO medium supplemented with 10 mg globulin-free BSA/ml and 10 microg heparin/ml. Presumptive zygotes were cultured in 1 of 3 culture media: 1) BSAITS - TCM 199 supplemented with 10 mg/ml BSA and ITS (5 microg/ml insulin, 5 microg/ml transferrin, and 5 ng/ml sodium selenite); 2) BECM - bovine embryo culture medium; and 3) BECM supplemented with ITS. Altogether, a significantly higher proportion of oocytes developed to the blastocyst stage after insemination with spermatozoa prepared by Method A than by Method B (17.9 vs 7.1%, respectively; P < 0.001). For Method A, the cleavage rate and the proportion of zygotes with >2 cells 48 h after insemination did not differ significantly between any of the 3 culture media assayed, but blastocyst formation was significantly stimulated in BSAITS and BECMITS compared with that in BECM (20.7 and 22.1% vs 10.7%, respectively; P < 0.05). For Method B, the cleavage rate and the proportion of zygotes with >2 cells were significantly lower in BSAITS than in BECM and BECMITS (56.4 and 28.7% vs 71.6 and 42.1%; and 70.2 and 51.1%, respectively; P < 0.05). However, no significant differences were recorded in blastocyst development rates between any of the culture media assayed (6.4 to 7.4%; P > 0.05).
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Affiliation(s)
- U Jaakma
- Department of Reproductive Biology Estonian Agricultural University, Tartu, Estonia
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23
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Fazeli AR, Zhang BR, Steenweg W, Larsson B, Bevers MM, van den Broek J, Rodriguez-Martinez H, Colenbrander B. Relationship between sperm-zona pellucida binding assays and the 56-day nonreturn rate of cattle inseminated with frozen-thawed bull semen. Theriogenology 1997; 48:853-63. [PMID: 16728177 DOI: 10.1016/s0093-691x(97)00310-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/1996] [Accepted: 04/25/1997] [Indexed: 11/18/2022]
Abstract
Assays based on sperm-zona pellucida binding have been developed as diagnostic tests to predict the fertilizing potential of mammalian spermatozoa. Recently, we reported on the development of a sperm-zona pellucida binding assay (SZBA) for bull spermatozoa. The aim of the present study was to develop a hemi-zona assay (HZA) for bull spermatozoa and to investigate the relationship between SZBA and HZA outcomes and in vivo fertility. Frozenthawed semen samples from 8 fertile Swedish Red and White bulls (one ejaculate per bull) designated as the test semen samples and a single ejaculate from a fertile Holstein-Friesian bull designated as the control semen sample were used in this study. In the SZBA, 2 groups of 20 oocytes per semen test sample and in the HZA a minimum of 6 matching pairs of hemizonae were used for comparison of sperm binding with control semen. Sperm binding to matching hemi-zonae of individual semen samples was equal, and clearly demonstrated the feasibility of the HZA for cattle. A significant correlation was found between the SZBA and the HZA indices obtained from the different semen test samples (r = 0.42, P < 0.001; n = 67). There was no significant relation between the SZBA indices and the 56-d nonreturn rate of the test samples. However, the HZA indices of the semen test samples and the 56-d nonreturn rate were significantly correlated (r = 0.46, P < 0.0001; n = 67). It is concluded that HZA can be regarded as a potential assay for predicting the fertilizing ability of bovine semen samples. However, further studies using more semen samples are necessary to confirm this view.
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Affiliation(s)
- A R Fazeli
- Department of Herd Health and Reproduction University of Utrecht, Utrecht, The Netherlands.
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24
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Qin GG, Song HZ, Zhang BR, Lin J, Duan JQ, Yao GQ. Experimental evidence for luminescence from silicon oxide layers in oxidized porous silicon. Phys Rev B Condens Matter 1996; 54:2548-2555. [PMID: 9986102 DOI: 10.1103/physrevb.54.2548] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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25
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Zhang BR, Larsson B, Rodriguez-Martinez H. Influence of batches of bovine oocytes on the outcome of an intact zona pellucida binding assay and in vitro fertilization. Int J Androl 1995; 18:213-20. [PMID: 7591195 DOI: 10.1111/j.1365-2605.1995.tb00413.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A series of experiments was performed in vitro to determine the variation between batches of abattoir-derived bovine oocytes to bind and to be fertilized by frozen-thawed spermatozoa provided by a single ejaculate from a bull with high field fertility after artificial insemination. Fourteen batches of oocytes, collected over a 90-day period, were divided randomly into two equal groups at each sampling period. One group of oocytes was subjected to in-vitro maturation and subsequently in-vitro fertilization (IVF) while the other group was used as intact oocytes in a zona binding assay (ZBA). Fertilized oocytes were evaluated for penetration and pronuclear formation and, in the ZBA, the number of spermatozoa bound to each oocyte was registered. Neither the results of the ZBA nor the IVF results varied significantly (p = 0.45) between batches. Furthermore, when a sperm concentration of 0.5 x 10(6)/ml was used, the number of spermatozoa bound to the zona pellucida correlated significantly with the frequency of oocytes penetrated after IVF (r = 0.76). The results suggest that variation between the batches of oocytes has no detrimental significance for the application of intact zona pellucida binding or IVF for assaying frozen-thawed bull semen, provided that a large number of oocytes/batch (> 15) are assayed.
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Affiliation(s)
- B R Zhang
- Swedish University of Agricultural Sciences, Uppsala, Sweden
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Hultén F, Zhang BR, Forsberg M, Dalin AM. Applying a Progesterone Assay to Faecal Samples Collected from Sows during the Oestrous Cycle. Reprod Domest Anim 1995. [DOI: 10.1111/j.1439-0531.1995.tb00613.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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27
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Zon LJ, Hao JH, Zhang BR. [Mitral valve replacement with preservation of papillary muscles and chordae tendineae: a report of 53 cases]. Zhonghua Wai Ke Za Zhi 1994; 32:553-5. [PMID: 7720428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Mitral valve replacement with preservation of papillary muscles and chordae tendineae (MVRP) was carried out in 53 cases in this group, among whom 17 underwent combined mitral and aortic valve replacement (AVR), 36 underwent simple mitral valve replacement (MVR) and tricuspid valve plasty was performed in 28 cases simultaneously. All the patients were given echocardiography one and six months after operation respectively which showed: (1) The left ventrical function of this group was obviously superior to that of the conventional mitral valve replacement (MVRC) group in the same period (SVI, EF, FS, P < 0.05) (2) The open shut velocity of the prosthetic disc was quicker (3) The contradictory movement of the ventrical septum disappeared. The follow-up for 2 to 36 months showed that all the patients were alive and healthy. It is suggested that MVRP can facilitate better recovery of the left ventrical function than MVRC and long-term results are excellent.
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Affiliation(s)
- L J Zon
- Changhai Hospital, Second Military Medical University, Shanghai
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28
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Mei J, Zhang BR, Zhu JL. [Treatment of MSOF after heart valve replacement: an analysis of 53 cases]. Zhonghua Wai Ke Za Zhi 1994; 32:342-4. [PMID: 7842957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
We treated 53 patients with multiple system organ failure (MSOF) following heart valve replacement. MVR was performed in 20 cases, AVR in 6 and DVR in 27. Before operation, NYHA functional class II was in 5, III in 17, and IV in 31. MSOF of all 53 patients occurred within 2-7 days after operation, and failing organs involved heart, lungs, kidneys, brain, gastrointestinal and blood coagulation system. The patients with the maximum organ failure had 6 failing organs, 36 of the 53 patients were living and 17 (32.1%) died. The mortality correlated positively with the number of failing organs. The results of MSOF which occurred sequentially were better compared with those occurred simultaneously. The death rate in patients with class IV was higher than that in those class II, III. The type of operation (MVR, AVR, DVR) did not effect the result of MSOF. The causes and management of MSOF after heart valve replacement were discussed.
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Affiliation(s)
- J Mei
- Changhai Hospital, Second Military Medical University
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29
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Zhang BR, Zhu JL, Hao JH. [Surgical treatment of combined valvular disease in 680 patients]. Zhonghua Wai Ke Za Zhi 1994; 32:325-8. [PMID: 7842953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Between 1982 and May 1993, we operated on 680 patients with combined valvular disease. Previous operations were including closed mitral commissurotomy in 87, and bioprosthetic valve replacement in mitral position in 15. The types of combined valve disease included mitral valve disease combined with functional tricuspid regurgitation (FTR) (245), with organic tricuspid disease (OTD) (10); mitral and aortic disease (258), combined with FTR (128), and with OTD (39). The early mortality was 4.7% in total 2.4% and 6.1% respectively in MVR or DVR plus tricuspid procedures. The main cause of early death was low cardiac output syndrome. The late mortality was 2.6% pt-yr, congestive heart failure and coagulant-related hemorrhage were the predominant causes of late death. We considered that FTR is the outcome of right ventricle decompensation, while tricuspid valve must be actively inspected intraoperatively, and must be corrected completely. OTD can be successfully repaired in most patients. Myocardial protection should be emphasized, and continuous perfusion of cold blood cardioplegia and controlled reperfusion of warm blood contained mannitol have marked effect.
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Affiliation(s)
- B R Zhang
- Changhai Hospital, Second Military Medical University, Shanghai
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30
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Zhang BR, Xu ZY, Zhu JL. [Pathological classification and clinical implications on rheumatic heart disease with giant heart]. Zhonghua Wai Ke Za Zhi 1994; 32:333-7. [PMID: 7842955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Between Jan. 1982 and July, 1993, 102 patients with rheumatic giant heart disease (cardio-thoracic ratio > or = 0.8) underwent valve replacement. Heart functional class III was in 54 patients, and class IV in 48. Early mortality was 8.8%, late mortality 3.6%. We classified the patients into five types, based on the valvular lesions, dilated degree of each atrial and ventricular chamber: Type I, giant left atrium (LA); Type II, obvious enlargement of LA and left ventricle (LV); Type III; obvious enlargement of LA, right atrium and ventricule (RA and RV); Type IV; all chambers obviously dilated; Type V, giant LA and RA. Clinical results showed that this kind of classification can reflect kinds of diseased valves, pathophysiological changes and clinical characteristics, and postoperative early and late outcomes, also can offer useful suggestions to operative method selection, and has great clinical significance for perioperative management.
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Affiliation(s)
- B R Zhang
- Changhai Hospital, Second Military Medical University
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31
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Hao JH, Zhang BR, Chen RK. [Valvuloplasty of rheumatic tricuspid valve disease]. Zhonghua Wai Ke Za Zhi 1994; 32:21-2. [PMID: 8045195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
This paper reports 49 cases with rheumatic tricuspid lesions underwent tricuspid valvuloplasty. Tricuspid stenosis was in 26, and combined with incompetence in 23. Posterior-septal, anterior-septal, and anterior-posterior commissural fusions were 9, 7, and 5 cases respectively. Tricuspid repair was used in all cases, fused chordae, papillary muscles and valvular commissures were each divided, then De Vaga's or Kay's annuloplasty was performed to correct the residual regurgitation. The associated procedures included DVR in 33, MVR in 15, and AVR in 1. Hospital death was 3 cases. All early survivors were followed up (2 months to 7 yrs, mean 4.2 yrs). There was no late death, heart functional class I was in 34, class II in 10 and class III in 2. Echocardiography performed 6 months postoperatively, showed no tricuspid regurgitation was in 38, moderate regurgitation in 8, and the right atrial volume decreased in various degrees. The principles and the methods of tricuspid valve repair in patients with rheumatic tricuspid lesions were discussed.
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Affiliation(s)
- J H Hao
- Changhai Hospital, Second Military Medical College, Shanghai
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Jia CX, Zhang BR, Zhu JL. [Effect of magnesium on arrhythmia after valvular replacement]. Zhonghua Xin Xue Guan Bing Za Zhi 1988; 16:200-1, 252. [PMID: 3229327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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33
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Zhu JL, Zhang BR, Cai YZ. [Emergency treatment of acute immobilization of the tilting disc prosthesis at operation: a report of 4 cases]. Zhonghua Wai Ke Za Zhi 1987; 25:528-30, 556. [PMID: 3446457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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34
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Yu MX, Zhang BR, Bai KL, Wang DT. [Relationship between the pathology of skin lesions and immunological parameters or clinical activity in SLE]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1986; 8:347-52. [PMID: 2952305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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35
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Zhang BR, Zhu JH, Geng ZJ. [Follow-up survey of 60 patients with mitral valve replacement using a flexible stent porcine aortic valve xenograft]. Zhonghua Xin Xue Guan Bing Za Zhi 1985; 13:252-4, 317-8. [PMID: 3836879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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36
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Cai YZ, Zhang BR, Zhu JL, Cai KH, Mao ZN, Jia ZQ, Fu JZ, Ye JW, Yu JR. Experimental studies on the pathogenesis of acute respiratory distress syndrome. Chin Med J (Engl) 1985; 98:528-37. [PMID: 3932020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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37
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Cai YZ, Zhang BR, Chen RK. [Mitral valve replacement with the Shanghai-made tilting disc prosthesis: a report of 222 consecutive cases]. Zhonghua Xin Xue Guan Bing Za Zhi 1985; 13:81-3, 156. [PMID: 4042852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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38
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Cai YZ, Zhang BR, Chen RK, Zhu JL, Hao JH, Geng ZJ. Experience with 124 consecutive elective mitral valve replacements with a Shanghai-made tilting disc prosthesis. Chin Med J (Engl) 1985; 98:299-304. [PMID: 3924526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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39
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Yuan X, Li JD, Liu JW, Li YS, Zhang BR. Sclerotic fasciitis. A clinical and pathologic analysis of 21 cases. Chin Med J (Engl) 1984; 97:515-25. [PMID: 6441688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
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40
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Liu BH, Zhang LY, Zhang BR. Intrauterine contraceptive device insertion with suture fixation at cesarean section. Chin Med J (Engl) 1983; 96:141-4. [PMID: 6406171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
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41
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Yuan X, Li JD, Liu JW, Li YS, Zhang BR. [Sclerotic fasciitis. A clinicopathological analysis of 21 cases]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1982; 4:372-6. [PMID: 6221817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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