bluuebunny/crossref_metadata_2025 huggingface dataset:
Phytochemisty and Spermatogenic Potentials of Aqueous Extract of Cissus populnea (Guill. and Per) Stem Bark
Authors: Ojekale Anthony B. , Lawal Oladipupo A. , Lasisi Adedoyin K. , Adeleke Tajudeen I.
Published: May 2007

In vivoclinical trials involving the administration of crude extracts of Cissus populnea to male subjects (normospermic, oligospermic, and azoopermic) in a 72-day study revealed that continuous exposure of the subjects to the extracts over this period did not significantly (p ≤ 0.05) alter sperm count, morphology, motility, or volume. Antimicrobial screening of the extract against some selected microbial isolates secondarily implicated in male infertility revealed total inactivity against the microbial isolates screened, i.e.,Staphylococcus aureus,Salmonella paratyphi,Escherichia coli,Proteus mirabilis,Pseudomonas aeruginosa,Candida albicans, andKlebsiellasp. Phytochemistry revealed the presence of tannins, flavonoids, saponins, and steroids. The presence of these secondary metabolites was confirmed by thin layer chromatography. We conclude that oral administration of aqueous extracts of the stem bark of Cisssus populnea over a 72-day period to human subjects apparently had no fertility enhancement effects on sperm parameters monitored in this study.
Therapeutical Intervention, Relaxation, Mental Images, and Spirituality (RIME) for Spiritual Pain in Terminal Patients. A Training Program
Authors: de Araújo Elias Ana Catarina , Giglio Joel Sales , de Mattos Pimenta Cibele Andrucioli , El-Dash Linda Gentry
Published: May 2007

Therapeutic intervention involving the technique of Relaxation, Mental Images, and Spirituality (RIME) can foster the redefinition of spiritual pain in terminal patients. A training course was developed to instruct health care professionals in its use, and the results were followed up by evaluating reactions of professionals to its use in intervention with patients. Six subjects (a nurse, a doctor, three psychologists, and an alternative therapist), all skilled in palliative care, were invited to take part in the experience. They worked with 11 terminal patients in public hospitals of the cities of Campinas, Piracicaba, and São Paulo, located in Brazil. The theoretical basis for the study involves action research and phenomenology, and the results were analyzed using both qualitative and quantitative methods. The analysis of the experience of the professionals revealed 5 categories and 15 subcategories. The analysis of the nature of spiritual pain revealed 6 categories and 11 subcategories. The administration of RIME revealed statistically significant differences (p< 0.0001), i.e., patients reported a greater level of well-being at the end than at the beginning of sessions, which suggests that RIME led to the redefinition of spiritual pain for these terminal patients. The training program proposed has shown itself to be effective in preparing health care professionals for the use of RIME intervention.
Sense of Coherence and Physical Health. Testing Antonovsky's Theory
Authors: Flensborg-Madsen Trine , Ventegodt Søren , Merrick Joav
Published: May 2007

In a previous paper, we argued that the original 29-item sense of coherence (SOC) scale developed by Aaron Antonovsky (1923–1994) was insufficient according to its reflection of SOC. The purpose of this study was to create a new version of the original 29-item SOC scale in order to test his hypothesis of a causal link between SOC and physical health. This shorter version was built on the exact same idea, theory, and conceptualization used by Antonovsky, which resulted in a SOC scale containing only 9 abstract questions. These nine questions, in addition to two questions about physical and psychological health, made up a questionnaire answered by 100 people at the entrance hall of the University Medical Center (Rigshospitalet) in Copenhagen. According to Antonovsky’s famous hypothesis, a strong association should be found between SOC and physical health, but surprisingly, we found that the new scale was falsifying the hypothesis, with a correlation between SOC and physical health of only r = 0.044 (NS). However, a highly significant correlation was found with psychological health with r = 0.502 (p= <0.0005). The authors are in a predicament since we strongly believe in Antonovsky’s famous idea of the relationship between SOC and health. However, we believe that it is our emotional aspects that primarily determine our physical health, which we will demonstrate in a subsequent study, but the reason we did not find any significant correlation in this study was the fact that our nine-item SOC scale was very mental (mental in the sense of applying to conscious cognition and attitude). We consider the mental aspects to determine our psychological health and the emotional aspects to determine our physical health. Our conclusion is that the original 29-item SOC scale mixed a few emotional aspects into the otherwise mental construct, which is the reason for the relatively low correlations found until now, when using the original scale.
Intraprostatic Hydatid Cyst: An Unusual Presentation
Authors: Nouira Yassine , Binous Mohamed Y. , Nouira Kais , Mekni Amina , Kallel Yousri , Fitouri Zouhaier , Sallami Sataa , Horchani Ali
Published: May 2007

A case of intraprostatic cyst is reported. The patient presented with a completely evacuated hydatid cyst of the prostate. The intraprostatic cystic cavity that was communicating with the urethra developed urinary stones. The patient had transurethral resection of the prostate, the stones in the cyst were pushed into the bladder and fragmented using a ballistic lithotripter. Pathological examination concluded to a prostatic hydatid cyst that had evacuated through the urethra and was complicated by stone formation within the residual cavity. Postoperative course was uneventful and follow-up did not show evidence of recurrence. This is the first case of hydatid cyst of the prostate to present as an intraprostatic stone pouch.
New Age Teaching: Beyond Didactics
Authors: Vlaovic Peter D. , McDougall Elspeth M.
Published: May 2007

Widespread acceptance of laparoscopic urology techniques has posed many challenges to training urology residents and allowing postgraduate urologists to acquire often difficult new surgical skills. Several factors in surgical training programs are limiting the ability to train residents in the operating room, including limited-hours work weeks, increasing demand for operating room productivity, and general public awareness of medical errors. As such, surgical simulation may provide an opportunity to enhance residency experience and training, and optimize post-graduate acquisition of new skills and maintenance of competency. This review article explains and defines the various levels of validity as it pertains to surgical simulators. The most recently and comprehensively validity tested simulators are outlined and summarized. The potential role of surgical simulation in the formative and summative assessment of surgical trainees, as well as, the certification and recertification process of postgraduate surgeons will be delineated. Surgical simulation will be an important adjunct to the traditional methods of surgical skills training and will allow surgeons to maintain their proficiency in the technically challenging aspects of minimally invasive urologic surgery.
Predictors of Success after Extracorporeal Shock Wave Lithotripsy (ESWL) for Renal Calculi Between 20—30 mm: A Multivariate Analysis Model
Authors: El-Assmy Ahmed , El-Nahas Ahmed R. , Abo-Elghar Mohamed E. , Eraky Ibrahim , El-Kenawy Mahmoud R. , Sheir Khaled Z.
Published: May 2007

The first-line management of renal stones between 20—30 mm remains controversial. The Extracorporeal Shock Wave Lithotripsy (ESWL) stone-free rates for such patient groups vary widely. The purpose of this study was to define factors that have a significant impact on the stone-free rate after ESWL in such controversial groups. Between January 1990 and January 2004, 594 patients with renal stones 20—30 mm in length underwent ESWL monotherapy. Stone surface area was measured for all stones. The results of treatment were evaluated after 3 months of follow-up. The stone-free rate was correlated with stone and patient characteristics using the Chi-square test; factors found to be significant were further analyzed using multivariate analysis.Repeat ESWL was needed in 56.9% of cases. Post-ESWL complications occurred in 5% of cases and post-ESWL secondary procedures were required in 5.9%. At 3-month follow-up, the overall stone-free rate was 77.2%. Using the Chi-square test, stone surface area, location, number, radiological renal picture, and congenital renal anomalies had a significant impact on the stone-free rate. Multivariate analysis excluded radiological renal picture from the logistic regression model while other factors maintained their statistically significant effect on success rate, indicating that they were independent predictors. A regression analysis model was designed to estimate the probability of stone-free status after ESWL. The sensitivity of the model was 97.4%, the specificity 90%, and the overall accuracy 95.6%.Stone surface area, location, number, and congenital renal anomalies are prognostic predictors determining stone clearance after ESWL of renal calculi of 20—30 mm. High probability of stone clearance is obtained with single stone ≤400 mm2 located in renal pelvis with no congenital anomalies. Our regression model can predict the probability of the success of ESWL in such controversial groups and can define patients who would need other treatment modality.
Idiopathic Infected Hydrocele in a Toddler: A Case Report with Review
Authors: Sagar Jayesh , Kumar Suhas , Mondal D. , Shah D.K.
Published: May 2007

Idiopathic infected hydrocele in infants is a rare, but well-documented, entity in English literature; however, occurrence of such a condition in a toddler is not yet documented. Here we report the case of an idiopathic infected hydrocele in a toddler for the first time in English literature. We also discuss a review of literature and demonstrate management of infected hydrocele by antibiotics without any surgical intervention, also for the first time in English literature.
An Unusual Complication of Suprapubic Catheter Insertion
Authors: Ananthakrishnan Krishnan , Ayyathurai Rajinikanth , Chiran J.K. , Islam Waliul , Srinivasan Vaikuntam
Published: May 2007

A patient who had a small bowel mesentery perforation following insertion of a suprapubic catheter (SPC) is described. He had no bowel complaints immediately following the procedure, but presented 10 weeks later with insidious onset bowel obstruction due to the kink caused by the catheter. This complication occurred despite cystoscopy control and adequate bladder distension prior to the procedure. This isolated case illustrates the fact that regardless of the ease and frequency of SPC insertion, complications do occur.
A Prospective Pilot Study to Validate the Management Protocol for Patients Presenting with Acute Urinary Retention: A Community-Based, Nonhospitalised Protocol
Authors: Gopi Shyamala S. , Goodman Chris M. , Robertson Allison , Byrne Derek J.
Published: May 2007

Acute urinary retention (AUR) in males is managed conventionally by hospital admission, alpha-adrenergic therapy, and trial without catheter. To reduce inpatient bed pressures, we set up a protocol to manage such patients in the community. We review our results in this paper. We performed a prospective study of male patients presenting to our acute admissions ward and Accident and Emergency department over 6 months. Patients with chronic urinary retention, macroscopic haematuria, sepsis, urinary tract infection, and/or serum creatinine >130 mmol/l were excluded from the study. Those enrolled were catheterised, commenced on alfuzosin (10 mg nocte), and discharged to the community. A trial without catheter (TWOC) was performed 5—7 days later. QoL/IPSS, peak flow rate, and residual volume assessment were performed following successful TWOC 3 months later.Thirty-one male patients with a median age of 69 years were studied and the median residual volume following catheterisation was 900 ml. The aetiology of AUR was benign prostatic hyperplasia (BPH) in 29 patients and constipation in the remaining 2 patients. TWOC was successful in 19 patients (61.3%) following first TWOC, 26 (83.9%) following second trial of voiding. The mean peak flow rate was 6.5 ml/sec and postvoid scan 165 ml, following an immediate TWOC. At 3 months follow-up, mean peak flow rate was 13.2 ml/sec, postvoid scan 26.5 ml, IPSS 4.5, and QoL score was 2. This study has shown that AUR can be managed safely and effectively in the community. Effective communication with the nurse urology specialist, general practitioner, and emergency department are crucial for the successful implementation of the protocol.
The Unusual Mass of Retrovesical Space: A Secondary Hydatid Cyst D?sease
Authors: Tuygun Can , Bakirtas Hasan , Imamoglu M. Abdurrahim , Sertcelik Nurettin , Zengin Kursad , Bozkurt Ibrahim Halil
Published: May 2007

Hydatic cyst of seminal vesicles is very rarely seen. We report a case who complained of the inability to void, which developed progressively with dysuria, frequency, nocturia, and tenesmus, due to a giant retrovesical hydatid cyst that displaced the bladder and rectosigmoid region.
Synostosis Between Pubic Bones due to Neurogenic, Heterotopic Ossification
Authors: Vaidyanathan Subramanian , Hughes Peter L. , Soni Bakul M.
Published: May 2007

Neurogenic, heterotopic ossification is characterised by the formation of new, extraosseous (ectopic) bone in soft tissue in patients with neurological disorders. A 33-year-old female, who was born with spina bifida, paraplegia, and diastasis of symphysis pubis, had indwelling urethral catheter drainage and was using oxybutynin bladder instillations. She was prescribed diuretic for swelling of feet, which aggravated bypassing of catheter. Hence, suprapubic cystostomy was performed. Despite anticholinergic therapy, there was chronic urine leak around the suprapubic catheter and per urethra. Therefore, the urethra was mobilised and closed. After closure of the urethra, there was no urine leak from the urethra, but urine leak persisted around the suprapubic catheter. Cystogram confirmed the presence of a Foley balloon inside the bladder; there was no urinary fistula. The Foley balloon ruptured frequently, leading to extrusion of the Foley catheter. X-ray of abdomen showed heterotopic bone formation bridging the gap across diastasis of symphysis pubis. CT of pelvis revealed heterotopic bone lying in close proximity to the balloon of the Foley catheter; the sharp edge of heterotopic bone probably acted like a saw and led to frequent rupture of the balloon of the Foley catheter. Unique features of this case are: (1) temporal relationship of heterotopic bone formation to suprapubic cystostomy and chronic urine leak; (2) occurrence of heterotopic ossification in pubic region; (3) complications of heterotopic bone formation viz. frequent rupture of the balloon of the Foley catheter by the irregular margin of heterotopic bone and difficulty in insertion of suprapubic catheter because the heterotopic bone encroached on the suprapubic track; (4) synostosis between pubic bones as a result of heterotopic ossification..Common aetiological factors for neurogenic, heterotopic ossification, such as forceful manipulation, trauma, or spasticity, were absent in this patient. Since heterotopic bone formation was observed in the pubic region after suprapubic cystostomy and chronic urine leak, it is possible that risk factors related to the urinary tract might have played a role in heterotopic bone formation, which resulted in synostosis between pubic bones.
Scintigraphic Demonstration of Urine Extravasation Secondary to Acute Ureteral Obstruction: A Case Report and Some Considerations about Acute Ureteral Obstruction
Authors: Sarmiento Federico M. , Sarmiento Arístides J.H. , Bardoneschi Edgardo , Sarmiento Arístides H.
Published: May 2007

Acute ureteral obstruction produces renal damage and complications that are proportional to the severity and length of the obstruction. Anatomic diagnosis of the obstruction may be insufficient to manage the patient. Intravenous urogram (IVU) is the method usually advised by radiologists to obtain functional information, but requires iodinated contrast agents. IVU anatomic information is superior to anatomic information obtained with renal scintigraphy, but normally the physician already has the anatomic information (unenhanced CT or ultrasound). A renal scan offers better physiologic information than the IVU, has neither adverse effects nor complications, is accurate to confirm or discard significant ureteral obstruction, and depicts obstruction complications. This paper presents a patient with spontaneous urine extravasation secondary to acute renal obstruction who is diagnosed with renal scintigraphy. The authors describe the scintigraphic signs of extraperitoneal, diffuse perinephric, urine extravasation and emphasize the role of renal scintigraphy in diagnosis and follow-up of renal colic.
Nonmyeloablative Allogeneic Stem-Cell Transplantation for Metastatic Renal Cell Cancer: A Review and Update
Authors: Erotocritou P. , Ahmed H. , Patel S.S. , Shergill I. , Patel H.R. , Shah P.M. , Arya M.
Published: May 2007

Metastatic renal cell carcinoma (RCC) is resistant to conventional chemotherapy and radiotherapy. However, immunotherapy appears to be effective in 15—20% of cases, with interleukin-2 becoming the standard therapy for this disease. As a consequence of the immune susceptibility of RCC, other avenues of immunotherapy are being explored, such as nonmyeloablative allogeneic stem cell transplantation (NST). A number of trials have shown NST to be effective in varying degrees, causing partial or complete regression. Although nonmyeloablative conditioning is safer than myeloablative conditioning, its role has yet to be clearly proven as many studies have shown variable effect. Alongside this limitation, transplant-related toxicity also forms obstacles. Regardless of the limitation of NST, further refinement of the technique, with appropriate patient selection, may lead to this being an effective therapeutic choice for a significant number of individuals.
Update on Robotic Laparoscopic Radical Prostatectomy
Authors: Matsunaga Garrett S. , Ahlering Thomas E. , Skarecky Douglas W.
Published: May 2007

The da Vinci surgical robot has been shown to help shorten the learning curve for laparoscopic radical prostatectomy (LRP) for both laparoscopically skilled and na surgeons[1,2]. This approach has shown equal or superior outcomes to conventional laparoscopic prostatectomy with regard to ease of learning, initial complication rates, conversion to open, blood loss, complications, continence, potency, and margin rates. Although the data are immature to compare oncologic and functional outcomes to open prostatectomy, preliminary data are promising.Herein, we review the technique and outcomes of robotic-assisted laparoscopic radical prostatectomy (RALP).
Histopathologic Outcomes of Robotic Radical Prostatectomy
Authors: Patel Vipul R. , Shah Sagar , Arend David
Published: May 2007

Robotically assisted laparoscopic radical prostatectomy is a minimally invasive alternative for the treatment of prostate cancer. We report the histopathologic and shortterm PSA outcomes of 500 robotic radical prostatectomies. Five hundred patients underwent robotic radical prostatectomy. The procedure was performed via a six trocar transperitoneal technique. Prostatectomy specimens were analyzed for TNM stage, Gleason’s grade, tumor location, volume, specimen weight, seminal vesicle involvement, and margin status. A positive margin was reported if cancer cells were found at the inked specimen margin. PSA data were collected every 3 months for the first year, then every 6 months for a year, then yearly. The average preoperative PSA was 6.9 (1–90) with Gleason’s score of 5 (2%), 6 (52%), 7 (40%), 8 (4%), and 9 (2%); postoperatively, histopathologic analysis showed Gleason's 6 (44%), 7 (42%), 8 (10%), and 9 (4%); 10, 5, 63, 15, 5, and 2% had pathologic stage T2a, T2b, T2c, T3a, T3b, and T4, respectively. Positive margin rate was 9.4% for the entire series. The positive margin rate per 100 cases was: 13% (1–100), 8% (101–200), 13% (201–300), 5% (301–400), and 8% (401–500). By stage, it was 2, 4, and 2.5% for T2a, T2b, T2c tumors; 23% (T3a), 46% (T3b), and 53% (T4a). For organ-confined disease (T2), the margin rate was 2.5% and it was 31% for nonorgan-confined disease. There were a total of 47 positive margins, 26 (56%) posterolateral, 4 (8.5%) apical, 4 (8.5%) bladder neck, 2 (4%) seminal vesicle, and 11 (23%) multifocal. Ninety-five percent of patients (n = 500) have undetectable PSA (<0.1) at average follow-up of 9.7 months. Recurrence has only been seen with nonorgan-confined tumors. Of those patients with a minimum follow-up of 1 year (average 15.7 months), 95% have undetectable PSA (<0.1). Our initial experience with robotic radical prostatectomy is promising. Histopathologic outcomes are acceptable with a low overall, positive margin rate. Shortterm biochemical recurrence-free survival has also been good. We believe that the precise dissection allowed by the advantages of laparoscopic robotic surgery will translate into excellent long-term oncologic outcomes. At this time, the lack of maturity of the PSA data prevent definitive comparison to the open approach.
Robotic-Assisted Surgery for Benign Urological Conditions
Authors: Murphy Declan G. , Challacombe Ben J. , Zaheer Lail-U-Mah , Khan M. Shamim , Dasgupta Prokar
Published: May 2007

Robotic technology for use in surgery has advanced considerably in the past 10 years. This has become particularly apparent in urology where robotic-assisted radical prostatectomy using the da VinciTMsurgical system (Intuitive Surgical, CA) has become very popular. The use of robotic assistance for benign urological procedures is less well documented. This article considers the current robotic technology and reviews the situation with regard to robotic surgery for benign urological conditions.
A Biased Median Filtering Algorithm for Segmentation of Intestinal Cell Gland Images
Authors: Wu Hai-Shan , Gil Joan
Published: May 2007

In this paper, we introduce a biased median filtering image segmentation algorithm for intestinal cell glands consisting of goblet cells. While segmentation of individual cells are generally based on the dissimilarities in intensities, textures, and shapes between cell regions and background, the proposed segmentation algorithm of intestine cell glands is based on the differences in cell distributions. The intestine cell glands consist of goblet cells that are distributed in the chain-organized patterns in contrast to the more randomly distributed nongoblet cells scattered in the bright background. Four biased median filters with long rectangular windows of identical dimension, but different orientations, are designed based on the shapes and distributions of cells. Each biased median filter identifies a part of gland segments in a particular direction. The complete gland regions are the combined responses of the four biased median filters. A postprocessing procedure is designed to reduce the defects that may occur when glands are located very close together and to narrow the gapping areas because of the thin distribution of goblet cells. Segmentation results of real intestinal cell gland images are provided to show the effectiveness of the proposed algorithm.
Development of a Positive Youth Development Program: Helping Parents to Improve Their Parenting Skills
Authors: Shek Daniel T.L. , Lee Britta M.
Published: May 2007

The Project P.A.T.H.S. (Positive Adolescent Training through Holistic Social Programs) is a positive youth development program that attempts to promote holistic development in adolescents in Hong Kong. In the Tier 2 Program of this project, social workers are expected to develop positive youth development programs for adolescents having greater psychosocial needs. They are required to submit proposals that will be evaluated in terms of whether the proposals are evidence based, and appropriate evaluation mechanisms are included. With reference to the literature on parental control processes that Chinese parents may be loose in their behavioral control and they tend to overemphasize academic excellence, it is argued that improvement of the parenting skills of parents of Chinese adolescents is an important area to be addressed. To facilitate social workers to prepare the related proposals, a sample proposal on how to improve the parenting skills of Chinese parents is described, including its conceptual framework, proposed program, and evaluation plan. It is argued that this supportive approach (i.e., preparation of a sample proposal) can help social workers to develop quality proposals on positive youth development programs in Hong Kong.
Transplantation: Polyomavirus Nephropathy and the Risk of Specific Immunosuppression Regimens
Authors: Wu Christine , Randhawa Parmjeet , McCauley Jerry
Published: May 2007

BK virus is ubiquitously present in the latent state in humans, and awareness of the importance of BK polyomavirus is emerging among the kidney transplant community. First discovered in 1971 in the urine of a renal transplant recipient, BK virus nephropathy (BKVN) has come to be recognized as a significant cause of genitourinary disease and potential graft loss in the kidney transplant patient. In this review, we discuss the risk factors, available methods of diagnosis and therapeutic monitoring, and current approaches to therapy of BKVN.
The Roles of Porous Coral Sands in Initial Enrichment of Ammonia-Oxidizing Bacteria
Authors: Guo Qing , Wu Zao-he , Qian Ming-liang , Gu Binhe
Published: May 2007

The purpose of this study was to investigate the roles of coral sands in the enrichment and isolation of ammonium-oxidizing bacteria (AOB). We hypothesized that the porous coral sands provided additional surface area and nutrients for the growth of periphytic AOB. In the present study, an orthogonal test was designed to compare the AOB conversion rates of ammonium-nitrogen (NH4+N) to nitrite-nitrogen (NO2--N) among various combinations of culture media. Results showed that the conversion of NH4+N to NO2--N increased significantly when the coral sands were added, implying that coral sands were beneficial to the growth of AOB. Additions of potassium dihydrogen phosphate (KH2PO4) or sodium bicarbonate (NaHCO3) to the media became unnecessary when coral sands were used, but the addition of KH2PO4was needed when the molar nitrogen to phosphorus (N:P) ratio reached 10 in the enrichment media using calcium carbonate (CaCO3) powder as a calcium source.
A Prospective Longitudinal Study of Seasonality in African Students Living in the Greater Washington, D.C. Metropolitan Area
Authors: Guzman Alvaro , Zebrak Ryszard , Rohan Kelly J. , Sumar Irshad A. , Savchenko Svetlana , Stiller John W. , Valadez-Meltzer Adela , Olsen Cara , Lapidus Manana , Soriano Joseph J. , Postolache Teodor T.
Published: May 2007

We conducted a prospective, longitudinal study of seasonality in a vulnerable population, i.e., African students who migrated to a temperate climate. Consistent with previous cross-sectional studies, we hypothesized lower mood and energy, and higher appetite and weight, in fall/winter than in spring/summer. Four cohorts of African students attending a year-long nursing school program without vacation in Washington, D.C., were assessed monthly for 1 year. Forty-three subjects (mean age = 33.46 ± 6.25), consisting of predominantly females (76.7%), completed the study. The cohorts began their academic program in different seasons (one each in winter, spring, summer, and fall), inherently minimizing confounding influences on seasonality, such as academic and immigration stress, as well as allowing adjustment for an order effect. At each assessment, students completed three 100-mm visual analog scales for mood, energy, and appetite, and were weighed on a digital scale. For each standardized dependent variable, a repeated measure ANOVA was used and, if a significant effect of month was identified, averages for spring/summer and fall/winter were compared using paired ttests. In addition, a mixed model for repeated measures was applied to raw (nonstandardized) data. Body weight was significantly higher in fall/winter than in spring/summer (p < 0.01). No seasonal differences in mood, energy, or appetite were found. Benefiting from certain unique features of our cohorts allowing adjustment for order effects, this is the first study to identify a seasonal variation in body weight with a peak in winter using longitudinal monthly measurements.
Mood Sensitivity to Seasonal Changes in African College Students Living in the Greater Washington D.C. Metropolitan Area
Authors: Guzman Alvaro , Rohan Kelly J. , Yousufi Samina M. , Nguyen Minh-Chau , Jackson Michael A. , Soriano Joseph J. , Postolache Teodor T.
Published: May 2007

The purpose of this study was to estimate the degree of seasonality and prevalence of winter- and summer-type seasonal affective disorder (SAD) in African immigrant college students in comparison with African American peers. A convenience sample of 246 African immigrants and 599 African Americans studying in Washington, D.C. completed the Seasonal Pattern Assessment Questionnaire (SPAQ), which was used to calculate a global seasonality score (GSS) and to estimate the prevalence of winter- and summer-type SAD. Degree of seasonality was related to a complex interaction between having general awareness of SAD, ethnicity, and gender. A greater percentage of African students reported experiencing a problem with seasonal changes relative to African American students, and had summer SAD, but the groups did not differ on GSS and winter SAD. African students reported more difficulties with seasonal changes than their African American peers, which could represent a manifestation of incomplete acclimatization to a higher latitude and temperate climate. As Africans also had a greater rate of summer SAD, this argues against acclimatization to heat.
Analysis of Climate Change Affecting German Forests by Combination of Meteorological and Phenological Data within a GIS Environment
Authors: Schröder Winfried , Pesch Roland , Schmidt Gunther , Englert Cordula
Published: May 2007

The regional assessment of global change effects on plant phenology usually relies on local observations that need to be up-scaled. Therefore, methodological difficulties mostly related to data spatial resolution and congruency arise while performing broader-scale evaluations. Geostatiscs could be a useful tool to solve this type of problem, provided that a database with adequate spatial and temporal resolution is available. An assessment of variations in air temperature and plant phenology was carried out at the country level by using two German datasets regarding spring phenological phases of 15 plant species and air temperature. The data were collected from 1961–2002 at 1,279 and 675 sites, respectively. The annual mean air temperature in Germany was found to rise from 8.3°C in the 1961–1990 period to 9.1°C in the 1991–2002 term. The overall 15-species mean for the start of spring was found to be 6 days earlier in the latter period. The geostatistical analysis of the data revealed the suitability ofSyringa vulgaristo be used as an indicator species to detect phenological changes in German forests. Moreover, their spatial patterns were found to be related to altitude and latitude. Therefore, geostatistics proved to be a useful tool to overcome some of the methodological problems related to the regional assessments of global change impacts on terrestrial ecosystems.
Alterations of the Biochemical Pathways of Plants by the Air Pollutant Ozone: Which are the True Gauges of Injury?
Authors: Heath Robert L.
Published: May 2007

Plant strategies to survive ozone stress include exclusion or tolerance of ozone. If these processes fail, past observations of ozone injury have indicated many physiological and metabolic changes then occur; most of these changes are likely to have been initiated at the level of gene expression, suggesting signal transduction. In the last decade considerable understanding of the biochemical process within plants has been developed. Currently there are several hypotheses regarding a response of plants to ozone fumigation: [1] membrane dysfunction and alteration of purpose; [2] stress ethylene interactions; [3] impairment of photosynthesis via changes in Rubisco levels and the guard cells so that the stomata do not track correctly the environment; [4] antioxidant protection through metabolites and enzyme systems to reduce the oxidant load; and [5] general impairment or disruption of metabolic pathways.

Many believe that free radicals and other oxidative products, formed in plant leaves under ozone exposure, are responsible for much of the spread of the biochemical alterations. There are obvious chemicals that may account for the changes that are observed, such as hydrogen peroxide. Once the ozone enters the tissue, evidence suggests the first line of defense is a range of antioxidants, such as ascorbate, glutathione peroxidase, superoxide dismutase, and catalase. If overwhelmed, subsequent events occur which are highly suggestive of systemic acquired resistance. Furthermore, other defensive indicators, such as salicylic acid and jasmonic acid, tend to increase, but more slowly than ethylene, and spread their signaling effects more widely in the plant.

The primary set of metabolic reactions that ozone triggers is thought to be “wounding“ responses with a secondary response of senescence. The dramatic strides in understanding the genetic make-up of plants, gene control, and signal transduction/control over the last few years will only accelerate in the future. We need now to have an understanding of those events that can be translated into more detailed schemes of how ozone alters much of the basic metabolism of plants and how plants counteract or cope with ozone. What is now known about how varied biochemicals and their pathways are changed upon ozone exposure will be discussed.
Contribution of Ambient Ozone to Changes in Scots Pine Defoliation. Step II of Lithuanian Studies
Authors: Augustaitis Algirdas , Augustaitiene Ingrida , Kliucius Almantas , Girgzdiene Rasele , Sopauskiene Dalia
Published: May 2007

This study aimed to explore if changes in peak ozone (O3) concentrations may reinforce the phytotoxic effects of air concentration of acidifying compounds and their deposition, as well as unfavorable climatic factors on pine crown defoliation. Forty-eight pine stands with more than 8000 sample pine trees have been monitored annually. The impact of sulfur dioxide (SO2) on pine defoliation was found to be the most significant. The impacts of peak O3concentrations, acid deposition, and amount of precipitation were considerably lower, whereas the impact of air temperature, the least. Contribution of peak O3concentrations to the integrated impact of acid deposition and amount of precipitation on pine defoliation was most significant, whereas the contribution to the impact of acidifying air compounds, mainly SO2, was the least. No synergetic effect between peak O3concentrations and high temperature during vegetation period was detected.
Fetus In Fetu — A Mystery in Medicine
Authors: Majhi A. K. , Saha K. , Karmakar M. , Sinha Karmakar K. , Sen A. , Das S.
Published: May 2007

Fetus in Fetu (FIF) is a rare condition where a monozygotic diamnionic parasitic twin is incorporated into the body of its fellow twin and grows inside it. FIF is differentiated from teratoma by the presence of vertebral column. An eight year old girl presented with an abdominal swelling which by X-ray, ultrasonography and CT scan revealed a fetiform mass containing long bones and vertebral bodies surrounded by soft tissue situated on right lumber region. On laparotomy, a retroperitoneal mass resembling a fetus of 585 gm was removed. It had a trunk and four limbs with fingers and toes, umbilical stump, intestinal loops and abundant scalp hairs but was devoid of brain and heart. Histology showed various well-differentiated tissues in respective sites. FIF is a mystery in reproduction and it is scarce in literature in such well-developed stage.
Chemokines
Authors: Horuk Richard
Published: May 2007

Chemokines are a family of polypeptides that direct the migration of leukocytestoward a site of infection. They play a major role in autoimmune disease and chemokine receptors have recently been found to mediate HIV-1 fusion. In this short review we examine the role of chemokines in host defence and in the pathophysiology of autoimmune diseases. We conclude by discussing various therapeutic approaches that target chemokine receptors and that could be beneficial in disease.
Towards a Chinese Conception of Adolescent Development in a Migration Context
Authors: Lam Ching-man
Published: May 2007

Although there are many well-known theories of adolescent development in the West, there is a notable lack of theory with empirical support to understand the process and outcome of Chinese adolescent development. This paper attempts to advance a Chinese conception of adolescent development in a migration context. A qualitative study approach was used to explore the experiences and views of 19 Chinese-Canadian adolescents from Hong Kong and ten of their parents. The findings indicate that parents and adolescents co-construct the dominant theme of “covert parental control” in the adolescent development process, and the concept of “self in relational networks” as the adolescent development outcome. Based on the developmental experiences of these Chinese-Canadian adolescents, a culturally sensitive model of Chinese adolescent development is proposed. This model incorporates culture and migration as two essential components of the framework for a theory regarding Chinese adolescent development. It acknowledges the experience of Chinese-Canadian immigrants, takes account of the participants' personal meanings, and incorporates the indigenous Chinese cultural concepts of bao (reciprocity), guan (guidance), and guanxi (relationship).
Criminal Mediation for Minors in Israel
Authors: Kandel Isack , Arie Yael , Glasner Sharon
Published: May 2007

Mediation was introduced in Canada in 1974 in order to handle a crime of robbery and vandalization committed by adolescents. After mediation, these adolescents agreed to apologize to each of their victims and pay restitution. Several countries (Canada, England, Finland, and the U.S.) have now made this opportunity available in the cases of young offenders. This review describes the process in the south of Israel. We find this method very powerful, but further studies are needed. Due to resource problems, it will not become mainstream in the near future.
Dissociated Steroids
Authors: Catley Matthew C.
Published: May 2007

Glucocorticoids (GCs) are some of the most important drugs in clinical use today. They are mainly used to suppress disease-related inflammation and are widely used for the treatment of many inflammatory diseases including asthma and arthritis. However, GCs are also associated with debilitating side effects that place limitations on the long-term use of these drugs. The development of a GC with reduced side effects would allow more effective treatments for patients who require long-term suppression of inflammation. GCs exert their effects by binding and activating the GC receptor (GR). The activated receptor then binds GC response elements (GREs) in the promoter of genes, and activates transcription (transactivation) or interferes with the activation of transcription by inhibiting the transactivating function of other transcription factors, such as AP-1 and NF-ĸB (transrepression). Transrepression is believed to be responsible for the majority of the beneficial anti-inflammatory effects of GCs, whereas transactivation is believed to play a bigger role in the unwanted side effects of GCs. Compounds that can dissociate the transactivation function of GCs from the transrepression function may, therefore, have an improved therapeutic index. A number of these dissociated corticosteroids have been developed.In vitroassays using these compounds appear to show good dissociation. However,in vivo, the dissociation appears to be lost and these compounds still produce many of the side effects associated with conventional GCs. A better understanding of the molecular mechanisms behind GC-induced effects would allow the design of novel selective GR modulators with an improved therapeutic index.
TNF-α as a Therapeutic Target in Acute Pancreatitis — Lessons from Experimental Models
Authors: Malleo Giuseppe , Mazzon Emanuela , Siriwardena Ajith K. , Cuzzocrea Salvatore
Published: May 2007

A considerable body of experimental evidence suggests that tumor necrosis factor (TNF)-α plays a major role in several aspects of inflammation and shock. In particular, it is pivotal in many detrimental effects of acute pancreatitis, and it represents a major determinant of the systemic progression and end-organ damage (such as acute lung injury and liver failure) of this pathologic condition. Given the importance of TNF-α in the pathogenesis of acute pancreatitis, investigators have regarded blocking the action of this mediator as an attractive treatment option. Different specific and nonspecific inhibitors have been developed with promising results in animal models, but, on the other hand, no clinical trials have been designed so far. Difficulties in clinical applications may be multifactorial; experimental models are not fully reliable and reproduce at least some aspects of human disease, timing of intervention should be related to changes in TNF-α serum levels, and inclusion criteria should be accurately selected to better define the population most likely to benefit.
A comprehensive computational characterization of conserved mammalian intronic sequences reveals conserved motifs associated with constitutive and alternative splicing
Authors: Voelker Rodger B. , Berglund J. Andrew
Published: May 2007

Orthologous mammalian introns contain many highly conserved sequences. Of these sequences, many are likely to represent protein binding sites that are under strong positive selection. In order to identify conserved protein binding sites that are important for splicing, we analyzed the composition of intronic sequences that are conserved between human and six eutherian mammals. We focused on all completely conserved sequences of seven or more nucleotides located in the regions adjacent to splice-junctions. We found that these conserved intronic sequences are enriched in specific motifs, and that many of these motifs are statistically associated with either alternative or constitutive splicing. In validation of our methods, we identified several motifs that are known to play important roles in alternative splicing. In addition, we identified several novel motifs containing GCT that are abundant and are associated with alternative splicing. Furthermore, we demonstrate that, for some of these motifs, conservation is a strong indicator of potential functionality since conserved instances are associated with alternative splicing while nonconserved instances are not. A surprising outcome of this analysis was the identification of a large number of AT-rich motifs that are strongly associated with constitutive splicing. Many of these appear to be novel and may represent conserved intronic splicing enhancers (ISEs). Together these data show that conservation provides important insights into the identification and possible roles of cis-acting intronic sequences important for alternative and constitutive splicing.
Development of indole chemistry to label tryptophan residues in protein for determination of tryptophan surface accessibility
Authors: Ladner Carol L. , Turner Raymond J. , Edwards Robert A.
Published: May 2007

Solvent accessibility can be used to evaluate protein structural models, identify binding sites, and characterize protein conformational changes. The differential modification of amino acids at specific sites enables the accessible surface residues to be identified by mass spectrometry. Tryptophan residues within proteins can be differentially labeled with halocompounds by a photochemical reaction. In this study, tryptophan residues of carbonic anhydrase are reacted with chloroform, 2,2,2‐trichloroethanol (TCE), 2,2,2‐trichloroacetate (TCA), or 3‐bromo‐1‐propanol (BP) under UV irradiation at 280 nm. The light‐driven reactions with chloroform, TCE, TCA, and BP attach a formyl, hydroxyethanone, carboxylic acid, and propanol group, respectively, onto the indole ring of tryptophan. Trypsin and chymotrypsin digests of the modified carbonic anhydrase are used to map accessible tryptophan residues using matrix‐assisted laser desorption/ionization time‐of‐flight mass spectrometry (MALDI‐TOF MS). Tryptophan reactivity is determined by identifying peptides with tryptophan residues modified with the appropriate label. The reactivity is calculated from the frequency that the modification is identified and a semiquantitative measure of the amount of products formed. Both of these measures of tryptophan reactivity correlate significantly with the accessible surface area of tryptophan residues in carbonic anhydrase determined from the X‐ray crystal structure. Therefore the photochemical reaction of halocompounds with tryptophan residues in carbonic anhydrase indicates the degree of solvent accessibility of these residues.
The Antihypertensive Efficacy and Safety of a Chronotherapeutic Formulation of Propranolol in Patients With Hypertension
Authors: Sica Domenic A. , Neutel Joel M. , Weber Michael A. , Manowitz Neil
Published: May 2007

This study evaluated the antihypertensive efficacy and tolerability of a chronotherapeutic formulation of propranolol designed for nighttime dosing (propranolol controlled release [CR]). A total of 434 patients with mild‐to‐moderate hypertension were randomized to placebo or to one of four doses of propranolol CR (80, 120, 160, or 640 mg/d). At baseline, the mean morning blood pressures were similar in each treatment group and averaged 152/101 mm Hg. After 8 weeks of treatment, morning diastolic blood pressure, the primary efficacy measurement, was significantly reduced from baseline in placebo (‐6.98 mm Hg) and all propranolol groups (p<0.001). The decreases ranged from 10.1 mm Hg in the 80‐mg/d group to 11.0 mm Hg in the 120‐mg/d group and were significantly larger than placebo in the 120–, 160‐, and 640‐mg/d groups
(p<0.05). Blood pressure measured in the evening (trough) demonstrated similar antihypertensive efficacy. Heart rate and rate‐pressure product were reduced in a dose‐related manner by propranolol CR. The formulation was well tolerated with only fatigue and dizziness being reported more frequently than in the placebo group. Propranolol CR is an effective antihypertensive formulation that May reduce blood pressure during the morning period of maximum cardiovascular risk.